Thermoelectric cooling unit
SUBSTANCE: thermoelectric cooling unit is applied in refrigerating engineering. A thermoelectric cooling unit includes two or more thermoelectric modules (2) arranged in sealed chamber (4) pre-vacuumised and filled with dry gas. Hot junctions of thermomodules are connected to liquid radiator (6) of the sealed chamber, and cold junctions are connected to condensers (7). Into each condenser there built are three independent thermosyphons (8) with internal steam lines (10); besides, evaporation zone (9) of thermosyphons is in the housing of air radiator (3) separated with heat-insulating insert (5) from the liquid radiator of the sealed chamber, which provides unidirectional heat transfer in case of power interruption of thermoelectric modules. Heat-insulated housing (1) forms internal and external thermal circuits. Fan (11) and electric heater (12) are installed on the air radiator housing.
EFFECT: use of the invention provides electric energy cost reduction.
The present technical solution relates to refrigeration, and particularly to thermoelectric cooling devices.
Analysis of design features thermoelectric cooling devices shows that to achieve the minimum temperature in the cooling chamber and to obtain the maximum efficiency must meet the following requirements:
thermoelectric modules (TEM) should be installed in a sealed (vacuum) chamber filled with dry gases and prevent the penetration of moisture;
each TEM must be separated from the cooling chamber thermal shutter, preventing the passage of heat when power is off, the TEM;
Temps should be in good thermal contact (preferably soldered) with devices for supplying and discharging the heat;
device for supplying and discharging the heat must provide a high density heat capacity (up to 10 W/cm2).
Known thermoelectric refrigeration unit , which contains two or more TEM, on the cold and hot junctions of which are mounted radiators. The space between the radiator and the space between the hot and cold junctions filled with moisture-proof insulating material. In this unit, radiators attached to the cold and hot junctions of thermoelectric modules directly without thermal shutter, so disabling ele is Tropicana through TEM from the radiator hot junction in the cooling chamber will be a large heat flux, that will significantly reduce the efficiency of a thermoelectric unit. A small area of contact of hot and cold junctions with air radiators will lead to large temperature changes, which would also cause a decrease in cooling capacity. Filling the cavity between the hot and cold junctions insulating waterproof material does not guarantee the sealing TEM and, in addition, the insulation has a thermal conductivity that provides a parasitic flow of warmth.
Known thermoelectric cooling unit , containing a cooled chamber and an intermediate circulating coolant circuit including a pump, an external heat exchanger with fan and placed in a refrigerated chamber of thermoelectric cooling unit. However, this setting has no heat of the shutter, as liquid cooling loop is always filled with fluid and a power outage TEM (or failure) will be a flow of heat from the hot junctions to the cold. From the description it is not clear whether provided sealing TEM, as it significantly affects the cooling capacity. In General, thermoelectric cooling unit has a complex and cumbersome device, and a cooling unit occupies a significant portion of the volume of the cooled camera.
Known thermoelectrochemical , which contains a series of thermopile with heat pipes for hot and cold junctions and device alternately activate thermopile. In this design the heat pipes perform the role of thermal shutter only in case of simultaneous shutdown of all thermocouples. As homogeneous junctions of all of thermocouples are located on the surface of one of the pipes, in the event of an outage of one or more thermocouples in the wall of the heat pipe will be a flow of heat that will significantly deteriorate the characteristics of the fridge. In addition, the elements in this design are not sealed, which is a disadvantage.
Closest to the proposed solution is a thermoelectric unit , which is selected as a prototype. Thermoelectric block contains thermopile by the first and second options for hot and cold, and on the third and on the cold or hot junctions that have heat pipes, made in the form of aluminum multi-channel flat tubes, partially filled with coolant. On the opposite junctions of thermopile on the third option is installed flowing liquid heat exchangers. However, in this thermoelectric unit no sealing TEM, so on cold junctions will be condensation and frost, significantly hudayi the cooling capacity of the unit. When turning off the power supply unit, the heat will be intense to penetrate into the volume of the refrigerating chamber through the heat pipes, which are made of material with high thermal conductivity and have high direct and inverse heat transfer capability. In addition, the cold junctions of thermoelectric modules are not isolated from each other and have thermal contact through the body of heat pipes. In a partial shutdown of TEM or the output part of them down the heat from the hot junctions to the cold will flow through the idle temps, which will reduce the efficiency of the refrigerator. The temps on the edges of the heat pipe will also be condensation or numerate frost, which inevitably reduces the efficiency of heat exchange of the heat sink and the entire unit as a whole.
The technical result achieved by using the proposed invention is to increase the cooling capacity of thermoelectric cooling unit, reducing the minimum temperature in the refrigerating chamber, enhancing the efficiency and reliability of the refrigerator.
This technical result is achieved by the fact that temps are installed in a sealed chamber which vacuumized to a pressure of ≈10-5mm RT. Art. to remove residual moisture and then filled with inert gas. Most preferred is xenon, the conductivity of which 4.6 R is for less than thermal conductivity of air.
This technical result is reinforced by the fact that the hot junctions TEM napivayutsa on the surface of the water-cooled heat sink, which ensures minimum temperature difference in thermal contact.
This technical result is reinforced by the fact that the liquid radiator has two opposing channel for flow of the coolant. This ensures a uniform temperature distribution over the surface of the radiator. The need for this is due to the fact that thermoelectric elements forming thermal junctions connected in TEM consistently. Structurally the same junctions, such as hot can be located on different parts of the hot plate and may have different temperature with non-uniform heat sink temperature. The temperature difference of a few degrees significantly affects the efficiency of the entire series circuit.
This technical result is reinforced by the fact that the cold junctions of each thermoelectric modules are independent from each other capacitors provide the supply of heat to the TEC from the air radiator cooling chamber. Each capacitor is connected with an air heat sink with heat pipes (thermosyphons)role of thermal shutters. Disabling TEM (or failure) of the condenser casing is heated to a temperature of ecolego radiator however, the penetration of heat into the cooling chamber is prevented due to the extremely low thermal conductivity of thermosyphons.
Strengthening the technical result is driven by the fact that each capacitor is connected with an air radiator through several independent thermosyphons (in particular construction 3). The use of multiple parallel coupled thermosyphons can: reduce the temperature drop at thermosyphon through the direct transfer of heat from the air of the radiator to the condenser; to increase the uniformity of heat transfer across the contact area of the capacitor, to increase the reliability of the design, since the TEM keeps working even when one working thermosyphon.
Strengthening the technical effect is achieved also due to the fact that the coolant in thermosyphons applied harmless freon R-134A, and thermosyphon is made with internal steam tube to reduce the temperature difference between the air cooler and condenser.
Strengthening the technical effect contributes to the fact that thermoelectric unit is not useful volume of the refrigerating chamber, it is placed outside, the air from the camera is fed to the air cooler through the inlet by means of the fan, here it is cooled and returned to the chamber through Yagodnoe hole. thermal control system disables the power supply when the desired air temperature in the refrigeration chamber. Air cooler is equipped with a heater for periodic removal from the edges of the frost, which prevents efficient heat transfer.
The essence of the invention is illustrated in the drawing, which shows a General view of a thermoelectric refrigerator.
Thermoelectric cooling unit includes a heat insulating housing (1), inside of which there are two or more TEC Peltier (2) and air cooler (3). Temps are in a sealed chamber (4), previously evacuated and filled with gas. The air housing, the heat sink is separated from the liquid radiator sealed chamber with thermal paste (5). Hot junctions of thermoelectric modules soldered to the liquid radiator (6), and cold junctions connected through thermal grease to the capacitor (7). In each capacitor built three independent thermosyphon (8)and evaporators (9) thermosyphons are in the air housing, a radiator, and inside thermosyphon includes a steam tube (10). The fan (11) ensures the supply of air from the chamber of the refrigerator, an electric heater (12) is installed on the housing of the air radiator.
The device operates as follows.
When you enable TEM cold junctions are cooled condensers heat the new pipes. The warmth coming from the volume of the refrigerating chamber with air, is passed first air to the radiator, then through the heat pipe is supplied to the cold junctions of thermoelectric modules. The power of TEM is performed when the value of the current strength corresponding to the maximum refrigeration efficiency (according to the passport manufacturer TEM). When reaching into the refrigerating chamber set temperature, thermostat turns off the power supply temps and fan that saves energy. The value of the reverse heat flow through thermoelectric unit remains minimal, it contributes to the preservation of the cooled state of the refrigerating chamber. The electric heater is switched off when the power supply temps and fan periodically heats the air to the radiator to eliminate on his ribs condensate and frost preventing efficient heat transfer.
The location of the TEM in a sealed volume filled with an inert gas (such as xenon), significantly reduces heat loss, since thermal conductivity of xenon 4.6 times less than thermal conductivity of air, vacuum the same volume eliminates convective and conductive heat loss. Disabling TEM in thermosyphons reverse transfer of heat by movement of the coolant is impossible, but the heat in his body. The number is the amount of heat is calculated by the formula:
where λ is thermal conductivity of the material, S is the cross section of the casing pipe, l is the length of the pipe section, ΔT is the temperature difference.
Estimates show that when the temperature difference λ=40°With one aluminum pipe length of 100 mm, an inner diameter ⌀10 mm and a wall thickness of 1 mm is the heat flux capacity
the stainless steel pipe with a wall thickness of 0.5 mm, while due to the heat vapors of freon inside of this tube heat flow is only Q=0.3 mW.
All signs etc is stavlennika thermoelectric cooling unit increase its cooling capacity and efficiency, the reduction of energy consumption during operation and increased reliability. In thermoelectric converters temperature difference between the hot and cold junctions and the cooling capacity are inversely proportional dependence in accordance with the load characteristics of TEM, therefore reducing the overall temperature difference through the use of heat pipes provides increased cooling capacity and decrease the temperature in the refrigerating chamber. For power supply TEM is used, the optimal value of current at which the refrigeration efficiency maximum TEM. Heat pipe type "thermosyphon" are thermal shutters, which gives the possibility to implement a system of control which periodically turns off the power to thermoelectric unit upon reaching a predetermined temperature in the refrigerating chamber to increase efficiency. Is the vacuum volume of the TEM or filling it with an inert gas, because you know that the most high performance TEM corresponds to the vacuum conditions in the gas environment, even with a small water content, performance TEM significantly deteriorate due to condensation and frost on the cold junctions. Installation of an electric heater is necessary due to the fact that the formation of frost or condensation on the price of the Ah air radiator significantly reduces the heat transfer coefficient and performance thermoelectric unit as a whole.
The present design, in comparison with the previously known, provides increased efficiency of the refrigerator, reduced energy consumption, reduced cooling time of the refrigerating chamber and allows you to get a lower (-18°C) temperature in the refrigerating chamber.
Known to the patent applicant and information materials not found thermoelectric refrigeration units with aggregate characteristics similar to the set of distinctive features of the proposed object.
1. RF patent №2092753, F25D 11/00, F25B 21/02, publ. 10.10.1997,
2. RF patent №2267720, F25B 21/02, publ. 10.01.2006,
3. RF patent №2008581, F25B 21/02, publ. 28.02.1994,
4. RF patent №2112908, F25B 21/02, F28D 15/02, publ. 10.06.1998,
Thermoelectric cooling unit containing two or more thermoelectric module associated hot junctions with liquid radiator and cold junctions with the condensers of the heat pipes, wherein thermoelectric modules are placed in a sealed chamber filled with an inert gas, in a liquid radiator uses a counter flow of the coolant, the cold junctions of each module installed on a stand-alone condenser that is connected with an air radiator three independent heat pipe thermosyphon type, made of titanium or stainless steel, and paricelli heat pipes integrated in the housing of the air radiator, on the surface of which has an electric heater and fan.
SUBSTANCE: device includes a thermoelectric battery used as a thermal pump and connected to an AC network through a rectifier and a temperature regulator and consisting of thermoelectric modules, the plates of which are thermally connected to heat exchangers respectively for supply of low-potential heat and removal of heat to the heated room. The thermoelectric battery is made of one or several parallel connected electrical circuits, each of which is formed with series connected thermoelectric modules, the number of which in the circuit is determined by the following ratio: n=KUo/Umax, where Uo - supply voltage of thermoelectric battery at the rectifier outlet, Umax - maximum allowable supply voltage of one module of the circuit, K=2-5 - electric load reduction factor of one module.
EFFECT: increasing the ratio of generated thermal power to consumed electrical power.
SUBSTANCE: in a thermoelectric module, the space enclosed between inner surfaces of heat exchange plates is filled with waterproof heat insulating coating that is inert to materials of elements of the thermoelectric module, with heat conductivity equal to and less than 0.001 W/m·K to volume V, where Vmin is restricted with outer surfaces of peripheral branches of peripheral rows of thermal elements of a thermoelectric module and end surfaces of heat exchange plates, and Vmax is restricted with inner surfaces of heat exchange plates of hot and cold joints, switching buses and end surfaces of heat exchange plates. Technical result of the invention is increase in maximum temperature difference of cold and hot joints at the module hot side temperature of Thot=27°C and increase in maximum cooling capacity.
EFFECT: avoiding heat transfer due to emission, heat conductivity and convection through air between the plates of cold and hot joints.
SUBSTANCE: system comprises a control unit and a thermoelectric unit, comprising a base with a heat insulation gasket with one or more through holes for installation of one or more thermoelectric assemblies, comprising a thermoelectric battery installed between the joined external radiator-heat exchanger, which is directly pressed to the plate of the thermoelectric battery and the inner radiator-heat exchanger, which is pressed to its other plate via a heat conductor, extended to formation of a gap with the value of 1-5 mm between the base and the surface of the external radiator. On radiators there are DC fans installed, at the same time minus terminals of both fans of basic assembly via a control unit switch are connected to a minus terminal of its source of supply, a plus terminal of the inner radiator fan is connected to the plus terminal of the source of supply, and the plus terminal of the external radiator fan is connected with the output terminal of the switchboard, onto which during operation of the unit in the heating mode the negative polarity of thermoelectric battery supply is installed.
EFFECT: increased cold efficiency in the mode of cooling and increased reliability in the heating mode, reduced consumption of power, dimensions.
SUBSTANCE: invention refers to medical equipment and aims at producing apparatuses implementing an optimum program of reverse thermal exposure on a human body area. The device comprises a control element in the form of series or parallel connected groups with series or parallel connected thermocouples, temperature sensors arranged on the thermally exposing surface of the control element, a direct current source, a first switch with its input connected to a DC source and with its output connected to the groups of thermocouples, a program control unit, a control unit of thermal power of the thermocouples contacts of which are in a supply circuit of the thermocouples, a two-temperature selector, a comparison unit, a second switch a control input of which is connected to an output of a program control unit. Outputs of the two-temperature selector are connected to input of the second switch an output of which and an output of the temperature sensors are connected to inputs of the comparison unit connected to a control input of a control unit.
EFFECT: use of the invention provides the higher performance of the device.
SUBSTANCE: invention refers to medical equipment, more specifically to diagnostic systems based on temperature skin sensitivity detection. A patient skin cold and warm receptor sensor comprises a thermode (3), a thermode temperature sensor and metre (7), a heat module (1), which implements the Peltier effect and containing heat exposure (2) and heat exchanger (4) surfaces, radiator system (5), a direct current source (10), a first switch (11), a second switch (13), a control signal generator (14), a dual-channel temperature metre controller (12), a pulse counter (16), a patient-controlled pulse generator (15). The thermode (3) is equipped on the heat exposure surface (2) of the heat module (1); the radiator system (5) is placed on the heat exchange surface (4) of the heat module (1); a temperature sensor (7) is positioned in the thermode channel (3). Outputs of the direct current source (10) are connected to inputs of the first switch (11); outputs of the first switch (11) are connected to poles of the heat module (1); outputs of the temperature sensor (7) are connected to inputs of the dual-channel temperature metre controller (12). Each switching output of the dual-channel temperature metre controller (12) is connected to one of the two inputs of the second switch (13); output contacts of the second switch (13) are in a circuit of the power supply of the heat module (1). An output of the control signal generator (14) is connected in parallel to control inputs of the first and second switches (11, 13), and an output of the pulse generator (15) is connected to an input of the pulse counter (16).
EFFECT: invention shall simplify the heat circuit of temperature skin sensitivity detectors.
4 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: device includes a vortex tube with a tangential inlet, a swirler and a braking device, cold and hot heat exchangers, between which thermoelectric modules are installed. Heat exchangers are made in the form of pipelines of trapezoidal section and arranged in turn along the vortex pipe on its outer side: hot - cold - hot, etc. in a circumferential direction with radial gaps relative to each other. Thermoelectric modules are adjacent with one of their flat thermosensitive surfaces to the lateral side of the pipeline of trapezoidal section of hot heat exchangers, and with the other flat thermosensitive surface to the lateral side of pipeline of trapezoidal section of cold heat exchangers.
EFFECT: improving reliability; enlarging functional capabilities; reducing temperature dissipation of hot and cold flows; increasing the efficiency.
3 cl, 6 dwg
SUBSTANCE: invention relates to field of medicine and can be used at stations of blood transfusion, in surgical and resuscitation departments of hospitals and clinics, as well as in medical research institutions. Device for freezing blood components, placed in polymeric containers, contains consisting of two connected to each other by means of hinge, parts, thermally isolated case with lock, control system, two temperature sensors, two units of semiconductor thermal batteries based on Peltier elements, unit of emergency alarm and recordation of process parameters, connected with system of visual and sound alarm and sensor of circuit voltage, sensor of door position and electric power supply source. Working chamber, shape of internal surface of which repeats shape of external surface of polymeric container with blood components, is placed in thermally isolated case. Device additionally contains first and second systems of forced air cooling, with each of units of semiconductor thermal batteries based on Peltier elements being in direct thermal contact with respective part of working chamber; in each of two parts of thermally isolated case made are through air channels, connected with respective systems of forced air cooling.
EFFECT: invention ensures high rate of freezing with low energy consumption.
2 cl, 1 dwg
SUBSTANCE: invention relates to medical equipment ad is intended for local temperature and magnetic impact on reflex zones of human lower extremities and can also be used for therapeutic massage. Device contains rubber strap in form of lower part of human leg, provided in its upper part with string for tightening and socket for connecting vacuum cleaner hose, which includes massage elements, consisting of thermoelectric module, massage applicators and air aluminium radiator. In rubber strap circuits of thermoelectric module supply are located. Source of magnetic field for magnetic impact is located between massage applicator and thermoelectric module, massage elements, contacting lower surface of foot being made in form of flat plate, containing rod from highly heat-conducting material, which has relief surface, formed by projections of rounded shape with different radii of curvature and sizes of projections. Rod is fixed on plate with possibility of its free rotation around its axis.
EFFECT: application of invention makes it possible to extend arsenal of means of local temperature and magnetic impact on reflex zones.
FIELD: machine building.
SUBSTANCE: heat-chamber comprises electronic control unit including power supply, parameter setting unit, indication unit, controller, and isothermal case with battery of thermoelectric modules. Electronic control unit is made up of side-mounted structure and comprises extra unit of setting temperature variation rate and channel of communication with test bench control computer. Isothermal unit is made up of detachable assembly including thermoelectric unit with thermostatically controlled chamber and base with through hole to accommodate sealed union with turntable secured thereon and fitted on test bench drive motor shaft. Said union consists of three sleeved axially fitted one onto the other.
EFFECT: reduced heat losses, higher accuracy and expanded performances.
FIELD: power engineering.
SUBSTANCE: device comprises a vessel radiator with a cooling object fixed in it, a heat conducting element with contact surfaces, an adjacent thermoelectric battery, cold and hot solders of which are parallel to each other and are thermally connected with the inner surface of the vessel radiator wall and the wall of the cooling object. The contact surfaces of the heat conducting element are made with an inclination relative to each other, and the inner surface of the vessel radiator wall is made with an inclination relative to the cooling object wall and is provided with a collar and limiting planks, at the same time the angle of inclination of the inner surface of the vessel radiator wall to the cooling object wall is equal to the angle of inclination of contact surfaces of the heat conducting element. The thermoelectric battery is installed on the inner surface of the vessel radiator between limiting planks with a support against the collar, and the heat conducting element is installed as capable of displacement for pressing of its contact surfaces to the wall of the cooling object and cold solders of the thermal battery and is equipped with a displacement device.
EFFECT: expansion of functional capabilities and improved manufacturability of a thermoelectric cooling device.
FIELD: manufacture of thermoelectric ice-making machines.
SUBSTANCE: proposed thermoelectric ice-making machine has housing with ice mold mounted on it which is provided with thermoelectric modules and straight-flow heat exchangers on vertical walls and hinged cover under it, reservoir above ice mold and polarity selector switch of thermoelectric modules. Thermoelectric ice-making machine is provided with water filter mounted in housing above reservoir equipped with thermoelectric modules and straight-flow heat exchangers on its vertical hat-conducting walls, drain branch pipe with cock fitted on the outside of housing under reservoir and reversible motor mechanically linked with pusher located between vertical walls of ice mold and hinged cover; water filter is hydraulically connected with reservoir, straight-flow heat exchangers of reservoir and ice mold; reservoir is hydraulically connected with drain branch pipe and ice mold.
EFFECT: increased productivity of ice-making machine.
6 cl, 5 dwg
FIELD: electric engineering.
SUBSTANCE: device has computer system block, thermoelectric module, cooling system block, heat drain for draining heat from thermoelectric module to environment, heat guide for draining heat from cooled computer system block, thermoelectric module for thermostatting of processor, container with melting substance, heat guide for draining heat from thermoelectric module, processor, power block.
EFFECT: higher reliability, higher efficiency, broader functional capabilities.
FIELD: refrigerating engineering; small-sized thermoelectric coolers for drinks used in automobile transport facilities.
SUBSTANCE: proposed thermoelectric container has casing with handle and thermoelectric module mounted vertically inside it; said module is provided with heat sink in form of radiator with electric fan and heat-conducting plate, cup-shaped insert with threaded cover for vertical motion and removal from casing; provision is made for power supply polarity switch for thermoelectric module and cord with plug. Casing is provided with flat spring projecting inside casing opposite heat-conducting plate, electric sensor showing availability of cup-shaped insert in casing and easily detachable plate with fastening holes located under casing. Cover of cup-shaped insert is provided with central hole and damper above it mounted on axle for lateral shift.
EFFECT: ease in use; extended functional capabilities.
3 cl, 7 dwg
FIELD: cooling equipment, particularly to produce cold in autonomous fixed and movable devices, for instance in domestic refrigerators.
SUBSTANCE: refrigerating plant comprises cooled chamber and intermediate coolant circulation loop. The loop includes pump, outer heat-exchanger with fan and thermoelectric cooling unit arranged in cooled chamber and having thermoelectric modules. The thermoelectric modules comprise heat-absorbing and heat-generating junctions. Heat-removing tube is installed in cooled chamber wall. The heat-removing tube is made as a cup in which outlet tube is arranged so that the outlet tube is spaced from heat-removing tube bottom to create annular heat-dissipating channel. Heat-generating junctions of thermoelectric modules are installed on outer surface of heat-removing tube so that the heat-generating junctions are uniformly distributed along heat-removing tube length. Heat-generating junctions are arranged in cooled chamber. Outlet tube is connected to pump inlet. Pump outlet is attached to heat-exchanger inlet. Heat-exchanger outlet is linked with heat-removing tube. Outer surface of heat-removing tube is cylindrical or polyhedral. Cross-sectional area of annular heat-dissipating channel is not less than that of outlet tube. Width of gap between inlet section of outlet tube and heat-removing tube bottom is not less than 0.25 from inner diameter of outlet tube. Outlet tube has orifices inclined towards fluid flow in outlet tube and formed in area of thermoelectric cooling module arrangement.
EFFECT: increased efficiency due to reduced heat losses and reduced power inputs, extended range of application due to extended temperature range of plant operation and simplified usage.
3 cl, 6 dwg
FIELD: heating or cooling systems.
SUBSTANCE: proposed device depending for its operation on Peltier effect has thermoelectric battery assembled of Peltier cells. Battery has two thermal-contact surfaces and at least two electric contacts. Switch is inserted in battery power conductor in series with circuit for measuring potential difference across battery electric contacts. Device also has switch control safety gear that functions to cyclically vary its position. At least one surface of thermoelectric battery can mount temperature transducer; newly introduced in device is electronic thermometer incorporating unit that compares measured temperature with desired value and is connected to temperature transducer and to switch safety gear.
EFFECT: reduced temperature setting transient time and temperature measurement error.
2 cl, 2 dwg
FIELD: apparatuses for producing metallic belts with amorphous structure.
SUBSTANCE: apparatus includes inductor where consumable metallic rod and rotating drum with cooled surface are arranged. Drum is in the form of hollow cylinder with central one-piece metallic axle. Thermoelectric different-power modules are mounted inside drum for producing belt with cyclically alternating properties. Heat absorbing junctions of modules are in contact with inner side of lateral surface of drum. Heat separating junctions of modules are in contact with one-piece metallic axle.
EFFECT: enhanced efficiency of apparatus, improved quality of belts with amorphous structure.
2 cl, 1 dwg
FIELD: medicine, applicable for local temperature affect on reflexogenic zones of human lower extremities, may be also used for a curative massage.
SUBSTANCE: in a rubber cloth the device has elements consisting of a thermoelectric module, whose first junctions are in a thermal contact with an applicator, which has a great number of metal lugs, and the second junctions - with a heat exchanger. Supply circuits of the thermoelectric modules are laid in the rubber cloth. The device represents a bag having the shape of the human lower extremity, it is made of rubber cloth and provided in the upper section with a tie for tightening and a branch pipe for connection of the vacuum cleaner hose. The applicator is made in the form of a metal plate, one of its plane surfaces has saw-tooth lugs, and the other is in a thermal contact with the first junctions of the thermoelectric module. The gap between the heat exchanger made in the form of an air aluminium radiator and the metal plate free of the thermoelectric module is filled with a dielectric compound. The thermoelectric modules are connected to the supply circuits so as to obtain a staggered temperature field.
EFFECT: produced an arbitrary temperature gradient of the applicator.
FIELD: transport engineering; air conditioning system.
SUBSTANCE: invention can be used in cabs of passenger and cargo vehicles. proposed air cooling and heating plant has unit of thermoelectric batteries with supply source and channels to pass liquid heat carrier from side of hot and cold heat transfers said heat transfers are connected to closed circulation circuits of hot and cold heat carriers. Cold heat carrier circulation circuit includes air radiator-cooler and first circulating pump. Hot heat carrier circulation circuit includes radiator-heater and second circulating pump. Radiator-heater and radiator-cooler are furnished with fans to blow through heated and cooled air, respectively. Thermoelectric battery unit is installed in housing in which two equal-volume spaces are formed. Heat exchange radiators are installed on cold and hot heat transfers whose packing factor is not less than 1000m2/m3.
EFFECT: simplified design, improved weight and dimension characteristics, reduced cost of servicing, improved ecological safety in operation.
FIELD: temperature control units for rocketry and space engineering.
SUBSTANCE: proposed thermostatting system includes propellant tank, heat-transfer loop with heat exchanger and supercharger, cooling radiator and two thermo-electric batteries. "Cold" commutating plates of these batteries on which first temperature sensors are mounted form thermal contact with external surface of tank over entire external surface. "Hot" commutating plates on which second temperature sensor (common for two sensors) is mounted form similar thermal contact with heat exchanger. Thermo-electric batteries are energized from self-contained power supply units whose voltage may be changed on signal received from control units. Control units receive signals from first individual temperature sensors and from common second temperature sensor. In case any "hot" commutating plate gets overheated, thermo-electric battery is disconnected by signal from second temperature sensor and is connected again as soon as temperature drops. Supply voltage is changed by signals of first temperature sensors.
EFFECT: increased term of storage of liquid component of rocket propellant at retained characteristics of engines.
SUBSTANCE: device can be used for local temperature influence onto reflex areas of human body. Thermo-electric semiconductor device has members incorporated into rubber canvas. The members have to be thermo-electric module, which has first seams to be in thermal contact with applicator having metal protrusions, and second seams are in contact with liquid heat exchanger. Power circuits of thermo-electric members and channels for supplying and removing fluid from heat exchangers are put inside rubber canvas. Applicator is made in form of metal plate. One flat surface of plate has saw-shaped protrusions, and the other surface is in thermal contact with first seams. Space between metal plate and fluid heat exchanger, which space doesn't contain thermo-electric module, is filled in with dielectric compound. Thermo-electric modules are connected to power circuits for supply of hetero-polar electric current to adjacent thermo-electric modules.
EFFECT: creation of temperature gradient of applicator according to random scheme.
2 cl, 3 dwg