Cooling device

FIELD: heating.

SUBSTANCE: invention is referred to electric engineering and may be used for cooling devices. Cooling device freezes products without additional inducer due to compressor motor operation in cooling cycle at alternating speed rates from power supply voltage.

EFFECT: improvement of productivity by freezing.

4 cl, 7 dwg

 

The invention relates to a cooling device, in which the compressor motor, ensure the implementation of the refrigeration cycle performed with the possibility of action with variable speed.

In prior art cooling devices, preferably in refrigerators, performance freezing is determined by the performance of the compressor, which implements the cooling cycle. Compressors significant performance provide the best freeze under certain conditions, but the energy consumption is much higher when they work with constant performance. Therefore, in order to obtain higher efficiency compressors with variable capacity and variable speed are preferred. But for variable speed compressors require such devices as the agent or the inverter to regulate themselves and their speed. Therefore, in addition to increasing cost, you receive a number of factors that affect efficiency, and therefore the total efficiency decreases.

According to the method of the prior art in accordance with the description of the patent application U.S. No. 4566289 describes a cooling device with high performance freezing, performed with the opportunity to work in several modes and driven by the power system overall is of use during operation separately from the inverter.

The purpose of the present invention is to provide a cooling device in which a refrigeration cycle is provided by the compressor, if necessary, from the mains power supply with variable speed.

The cooling unit is designed to perform these tasks, shown in the accompanying drawings, in which

Figure 1 - block diagram of the cooling device.

Figure 2 - schematic representation of the engine control unit that contains thermostat, which provides a direct drive motor.

Figure 3 - schematic representation of the engine control unit containing the inverter with a logical control unit and thermostat, which provides a direct drive motor.

4 is a schematic illustration of the engine control unit, which actuates the three-phase with a Wye motor from a single phase voltage source directly through thermostat or through the inverter layout Steinmetz.

5 is a schematic illustration of the engine control unit, which actuates the three-phase connection triangle motor from a single phase voltage source directly through thermostat or through the inverter layout Steinmetz.

6 is a schematic illustration of the inverter circuits containing logiteck the first control unit and thermostat, which actuates a single-phase motor from a single-phase voltage source.

7 is a schematic illustration of the inverter circuits containing logic control unit and thermostat, which operates a three-phase motor from a three phase voltage source.

The cooling device (1) includes a motor (2), which provides for circulation of a refrigerant and which is supplied from a source (A) supply such as a voltage supply; and a unit (4) motor control that controls the engine (2).

Block (4) management engine includes an inverter circuit (3)providing the voltage from the source (A) power to operate the motor (2) at a desired frequency; a switching unit (5), which passes the voltage from the source (s) power engine (2); and thermostat (6), which depending on the determined temperature level carries out the start-up switching unit (5) and/or inverter circuit (3) and thereby allows operation of the engine (2) from the first voltage supply and then from the inverter scheme (3).

According to the implementation of the invention: thermostat (6)installed in the cooling device (1), acts as a switch in block (4) management engine by determining the temperature; thus actuates the motor (2) sleep is Ala from mains voltage supply and generates a signal in the inverter circuit (3) to activate the control. The inverter circuit (3) in this implementation has at least one unit (22) controls the properties of the logical unit management: software management and with such hardware as a microprocessor and/or memory device; a Converter (24) to obtain the corresponding data from the incoming temperature data, such as analog-to-digital Converter, the device input/output serial peripheral interface and the pathogen (23), such as the causative agent in the form of a gate MOS structures for control switches (figure 3).

Another implementation of the invention uses at least one block (31) of the control thermostat is made with the possibility to determine the temperature at a single point or at several points, with the software that controls the operation of the block (31) of the control thermostat and the points with which it is connected; and with such hardware, as at least a microprocessor and/or memory device. In this implementation in the cooling device (1) has an electronic thermostat (6), which acts as a switch unit (4) controlling the motor, determining one or more values of temperature and actuates a motor (2) from the first voltage network Energon is bienia and manages all the operating mode of the engine (2), through the start, and the inverter circuit (3), and a switching unit (5) at the right time. However, regardless of the presence of the control unit in the cooling device (1) electronic thermostat (6) controls the motor (2) by measuring their values and thus controls the cycle of the cooling unit (figure 2).

According to the implementation of the present invention, thermostat (6) is between the lower temperature (Tbottomand upper temperature level (Ttop), and when in the cooling device (1) defines the lower temperature level (Tbottom), then thermostat (6) generated by the signal transmits this temperature level (Tbottomin the inverter circuit (3), disconnects the engine (2), as the engine temperature level (Tbottomno need, through the switching unit (5) enters the engine (2) in the state in which he operates from a voltage supply through thermostat (6); and when in the cooling device (1) is defined upper temperature level (Ttop), then thermostat (6) generated by the signal transmits this temperature level (Ttopin the inverter circuit (3)when the engine (2) is not working at this temperature level (Ttop); performs the engine start (2) to work from the first voltage supply and the eating starts the cooling in the cooling device (1), starts the inverter circuit (3) for the engine (2) with higher speeds for greater freezing; and when in the cooling device (1) is defined temperature level between the lower temperature (Tbottomand upper temperature level (Ttop), thermostat (6) generated by the signal transmits this temperature level in the inverter circuit (3) and does not interfere with the operation of the inverter circuit (3) or switching circuit (5), until the temperature reaches the lower temperature level (Tbottom) or the upper temperature level (Ttop).

In this implementation of the invention, according to which the inverter circuit (3) and/or a switching unit (5) includes thermostat (6), the inverter circuit (3) for single-phase motor (2) contains four diode, a capacitor and a four transistor in the inverter is made in the form of single-phase bridge (6); or, on the other hand, in the industrial application of the inverter circuit (3) is designed as a three-phase bridge with four to six diodes, preferably with one or more capacitors, and with six transistors (Fig.7).

In accordance with another implementation of the invention: cooling device (1) with three-phase motor (2) is supplied from the non-three-phase source schema Steinmetz. In this implementation inverting the scheme (3) is preferably six, of the power switch (21). The power switch (21) controls the unit (22) controls. This ensures effective management of the three-phase motor (2) Wye (4) or three-phase motor (2) with the connection of the triangle (figure 5), which are both supplied from single-phase power source.

If you want to increase the freezing, the engine (2) should work with other frequency values. The inverter circuit (3), the motors (2)non engines type compressor of variable capacity, especially single-phase motors, to work in a changing environment. If the engine (2) will always operate from the inverter circuit (3), you may be experiencing such difficulties: at the beginning of engine operation (2) initial current will rise to a level that may damage the inverter circuit (3). Therefore, the switching unit (5) is used to transfer voltage from a source (s) power engine (2), either directly from the source (A) power, either through the inverter circuit (3).

Through the implementation of the present invention freezing is provided with the lowest power consumption when the ambient temperature is not in the range of 32.5-40,1°S, which are considered abnormal conditions; and when the cooling device (1) in the gap with the optimal performance, and compressors, which performance is below the required level.

According to the implementation of the invention, depending on measured their temperature thermostat (6) activates the motor (2), or directly to the voltage supply from the source (A) power supply, or by using the inverter circuit (3). Therefore, thermostat (6)installed in the cooling device (1), engine (2) with variable speed is provided economically without the use of additional control Board or such additional devices. According to the implementation of the invention, as during starting of the engine is supplied from a source (A) power, therefore, the inverter circuit can be performed with a smaller number of parts and therefore less cost.

The numbering of the COMPONENTS IN the DRAWINGS:

1. The cooling unit

2. Engine

3. Inverter schematic

4. The engine control unit

5. The switching unit

6. Thermostat

21. The power switch

22. The control unit inverter

23. Pathogen

24. Converter

31. The control unit thermostat

1. The cooling device (1)containing a motor (2)providing the ability to perform the cooling cycle and recorded from the source (A) power, for example, from the voltage supply; b is OK (4) engine control (2), including the inverter circuit (3)which controls the engine (2) and adjusts the frequency of the engine (2) in accordance with the voltage coming from the source (A) power supply; a switching unit (5), which passes the voltage from the source (s) power engine (2); thermostat (6), which depending on the determined temperature level starts switching unit (5) and/or inverter circuit (3) and thereby allows operation of the engine (2) from the first voltage supply and then from the inverter scheme (3), characterized in that it contains the block (4) management engine that includes an electronic thermostat that acts as a switch unit (4) controlling the motor and engaged to start the engine (2) voltage of the supply network when one or more measured their temperature values, and controls the operating mode of the engine (2), starting and inverter circuit (3), and a switching unit (5) at the right time; managing the engine (2) by measuring their values, and thus governs the cycle of the cooling unit.

2. The cooling device (1) according to claim 1, characterized in that it contains the schema (7) management engine having the properties of a logical control unit and containing the inverter circuit (3)which has at least one unit (22) management software is obespechenie to operate and with such hardware, as the microprocessor and/or memory device; a Converter (24) to obtain the corresponding data from the data measured temperature, for example, analog-to-digital Converter, the device input/output serial peripheral interface and the pathogen (23)to control the switches.

3. The cooling device (1) according to claim 1, characterized in that the block (4) management engine includes a switching unit (5) and the inverter circuit (3)connected to Steinmetz 4, resulting in the ability to work a three-phase motor (2) from the single-phase voltage of the supply network.

4. The cooling device (1) according to claim 2, characterized in that the block (4) management engine includes an inverter circuit (3), which has a unit (22) controls with multiple power switch (21), the software to control the power switch (21) and a storage device.



 

Same patents:

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3 cl, 21 dwg

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FIELD: electrical engineering.

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1 dwg

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FIELD: electrical engineering; electrical machines and inductor generators in particular.

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FIELD: railway transport.

SUBSTANCE: invention relates to devices which control motor-fans in forced air cooling system of electric locomotive traction motors. Proposed device contains motor-fan 2 whose electric motor is connected through controllable converter 4 to power supply source 3, automatic regulator 9 of said power converter 4 with input comparison element 7. Output of current sensor 5 of electric locomotive traction motors and output of electric parameters pickup 8 of electric motor of motor-fan 2 are connected to inputs of automatic regulator. Nonlinear functional converter 6 is provided additionally being connected between output of traction motor current sensor 5 and one of inputs of comparison element 7.

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Inductor generator // 2318289

FIELD: electrical engineering; electrical machines such as inductor generators.

SUBSTANCE: proposed inductor generator has front and rear end plates with radial holes, stator in the form of stack carrying running winding, rotor in the form of sprocket with axial magnetic circuits, built-in rectifier, field coils mounted on end plates and placed in magnetic contact with axial magnetic circuits, as well as rotor hollow shaft with radial holes, one of its extensions being provided with plug and other one communicates with inlet port of cooling system. Novelty is that rotor is provided with additional disks having radial ducts in vicinity of radial holes of rotor, radial holes of end plates, and end portions of rotor winding.

EFFECT: improved thermophysical characteristics, simplified mechanical design due to dispensing with separate fan.

1 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: device is designed for use as drive motor, for instance, for pump. Proposed motor has rotor 16 with driving shaft 20 and stator 14 enclosed in stator casing 26. Stator casing is enclosed in outer casing 36. Intermediate chamber 38 is found between stator casing 26 and outer casing 36 which is hermetically closed and filled up with cooling agent 42. Cooling agent 42 is moved by impeller 48. for this purpose impeller 48 is connected with driving shaft 20 of drive motor 12 by means of magnetic coupling 52 with permanent magnet which can be made as synchronous, hysteretic or induction coupling of drive.

EFFECT: improved reliability owing to prevention of clogging of drive motor cooling system.

22 cl, 10 dwg

FIELD: electric engineering, in particular, specific structural features of electric machines, namely - inductive generators.

SUBSTANCE: in synchronous generator, which contains frontal and back lids with apertures, stator in form of a packet with working winding, rotor with excitation source, hollow shaft of rotor with radial apertures and with central aperture, which is connected to input aperture of cooling system, air conductor and rectifier, according to given invention, rectifier is made in form of horizontal assembly with linear placement of diodes, where horizontal assembly is positioned in aperture of hollow shaft and held by cantilevers which pass through walls of air ducts and are held on lids. Usage of aforementioned structure allows substantial improvements to generator cooling, especially that of its rectifier, which is positioned first along air route, and also provides for increased compactness of structure, because shaft hollow is used for placement of rectifier, which simultaneously allows to reduce axial dimensions of generator.

EFFECT: improved operational characteristics due to reduction of consumed power and improvement of thermo-physical characteristics.

1 dwg

FIELD: electric engineering, in particular, specific structural features of electric machines, namely - inductive generators.

SUBSTANCE: in synchronous generator, which contains frontal and back lids with apertures, stator in form of a packet with working winding, rotor with excitation source, hollow shaft of rotor with radial apertures and with central aperture, which is connected to input aperture of cooling system, air conductor and rectifier, according to given invention, rectifier is made in form of horizontal assembly with linear placement of diodes, where horizontal assembly is positioned in aperture of hollow shaft and held by cantilevers which pass through walls of air ducts and are held on lids. Usage of aforementioned structure allows substantial improvements to generator cooling, especially that of its rectifier, which is positioned first along air route, and also provides for increased compactness of structure, because shaft hollow is used for placement of rectifier, which simultaneously allows to reduce axial dimensions of generator.

EFFECT: improved operational characteristics due to reduction of consumed power and improvement of thermo-physical characteristics.

1 dwg

FIELD: electric engineering and electric mechanical engineering, namely - systems for cooling electric machines, primarily turbo-generators, with closed ventilation cycle.

SUBSTANCE: in accordance to the invention, electric machine includes body (1), comprising coolers (5), (6) of stator (2) and rotor (4), stator (2), having radial channels (11) in end zones of core, rotor (4), installed in stator (2) with air gap and having ventilation channels (13) with inputs and outputs on different rotation radiuses, ventilators (7), positioned on both sides of rotor barrel, and chambers (8), (9), one of which, chamber (8) for collecting cold air, is positioned between coolers (5) of stator and external surface of stator core (2), and another one, chamber (9) for collecting heated air, is positioned in placement zones of frontal parts of winding (10) of stator (2), outputs of stator coolers (5) and inputs into radial channels (11) of end zones of stator core are connected to chamber (8) for collecting cold air, and outputs of radial channels (11) of end zones, inputs of rotor coolers (6), inputs into ventilators (7) and outputs of rotor channels are connected to chamber (9) for collecting heated air, while outputs of coolers (6) of rotor (4) are connected to inputs of rotor channels, and high pressure zone (14) of ventilators (7) is connected to stator coolers inputs. In accordance to the invention, press plates have channels (12), inputs of which are connected to chamber (8) for collecting cold air, and outputs are connected to chamber (9) for collecting hot air, and main zone of stator core has water cooling system in form of coolers, positioned between packets (3) of stator core. Method for cooling the electric machine characterized above is realized as follows. Cooling air from stator coolers through the chamber for collecting cold air of stator, set up between stator coolers and external surface of stator core, and from rotor coolers, is directed by means of forcing elements, namely ventilators, positioned on both sides of rotor barrels, and rotor channels, along various routes into channels of rotor and stator core, and the air heated up in these channels is directed into chamber for collecting heated air, set up in zones of placement of frontal parts of stator winding, to inputs of rotor coolers and to inputs of ventilators and further - to stator coolers, where one route is set up from stator coolers, from outputs of which cooling air is directed from external surface of stator core into radial channels of end zone of stator core, another route is set up from rotor coolers, from outputs of which cooling air is directed into rotor channels. One more route, in accordance to the invention, is set up starting at rotor coolers, from outputs of which cooling air is directed into channels of press plates of stator core, while cooling of stator winding and main stator core is performed by water, circulating in pipes of coolers, which are positioned between main stator core packets.

EFFECT: increased cooling efficiency of stator winding and core, reduced material consumption of high power electric machines.

2 cl, 1 dwg

FIELD: electric engineering and electric mechanical engineering, namely - systems for cooling electric machines, primarily turbo-generators, with closed ventilation cycle.

SUBSTANCE: in accordance to the invention, electric machine includes body (1), comprising coolers (5), (6) of stator (2) and rotor (4), stator (2), having radial channels (11) in end zones of core, rotor (4), installed in stator (2) with air gap and having ventilation channels (13) with inputs and outputs on different rotation radiuses, ventilators (7), positioned on both sides of rotor barrel, and chambers (8), (9), one of which, chamber (8) for collecting cold air, is positioned between coolers (5) of stator and external surface of stator core (2), and another one, chamber (9) for collecting heated air, is positioned in placement zones of frontal parts of winding (10) of stator (2), outputs of stator coolers (5) and inputs into radial channels (11) of end zones of stator core are connected to chamber (8) for collecting cold air, and outputs of radial channels (11) of end zones, inputs of rotor coolers (6), inputs into ventilators (7) and outputs of rotor channels are connected to chamber (9) for collecting heated air, while outputs of coolers (6) of rotor (4) are connected to inputs of rotor channels, and high pressure zone (14) of ventilators (7) is connected to stator coolers inputs. In accordance to the invention, press plates have channels (12), inputs of which are connected to chamber (8) for collecting cold air, and outputs are connected to chamber (9) for collecting hot air, and main zone of stator core has water cooling system in form of coolers, positioned between packets (3) of stator core. Method for cooling the electric machine characterized above is realized as follows. Cooling air from stator coolers through the chamber for collecting cold air of stator, set up between stator coolers and external surface of stator core, and from rotor coolers, is directed by means of forcing elements, namely ventilators, positioned on both sides of rotor barrels, and rotor channels, along various routes into channels of rotor and stator core, and the air heated up in these channels is directed into chamber for collecting heated air, set up in zones of placement of frontal parts of stator winding, to inputs of rotor coolers and to inputs of ventilators and further - to stator coolers, where one route is set up from stator coolers, from outputs of which cooling air is directed from external surface of stator core into radial channels of end zone of stator core, another route is set up from rotor coolers, from outputs of which cooling air is directed into rotor channels. One more route, in accordance to the invention, is set up starting at rotor coolers, from outputs of which cooling air is directed into channels of press plates of stator core, while cooling of stator winding and main stator core is performed by water, circulating in pipes of coolers, which are positioned between main stator core packets.

EFFECT: increased cooling efficiency of stator winding and core, reduced material consumption of high power electric machines.

2 cl, 1 dwg

FIELD: electrical and electromechanical engineering; generators and other cooled electrical machines.

SUBSTANCE: novelty is that proposed electric current generator that has open-circuit gas cooling system, stator frame, rotor, and stator is provided in addition with gas-tight barriers installed within stator frame at stator iron stack ends, gas discharge manifold mounted on outer surface of stator frame, and gas supply manifolds, on its ends.

EFFECT: provision for energy and resource conservation in manufacture and in service, enhanced operating reliability of generator.

2 cl, 2 dwg

FIELD: electrical and electromechanical engineering; generators and other cooled electrical machines.

SUBSTANCE: novelty is that proposed electric current generator that has open-circuit gas cooling system, stator frame, rotor, and stator is provided in addition with gas-tight barriers installed within stator frame at stator iron stack ends, gas discharge manifold mounted on outer surface of stator frame, and gas supply manifolds, on its ends.

EFFECT: provision for energy and resource conservation in manufacture and in service, enhanced operating reliability of generator.

2 cl, 2 dwg

Air conditioner // 2332621

FIELD: air conditioning.

SUBSTANCE: invention pertains to the technology of air conditioning. The air conditioner has a heat source device and a terminal device, joined by connection pipes for a coolant, in which there is exact determination of whether the contour of the coolant has the required amount of coolant or not. The conditioner can work, when switched in any of the normal working modes, in which the heat source device, consisting of a compressor and a lateral heat exchanger of the heat source device, is joined to terminal devices, consisting of lateral expansion valves and terminal lateral heat exchangers, using connection pipes. Each device is controlled depending on the work load of the terminal devices, or the working mode is determined by the quantity of the coolant, in which the terminal devices carry out cooling operations, and the running power of the compressor is regulated such that, the pressure during evaporation of terminal lateral heat exchangers is constant with control of lateral expansion valves such that, the degree of super heating on outlets openings of terminal lateral heat exchangers have a positive value.

EFFECT: accurate determination of whether the coolant contour has the required amount of coolant in a monofunctional conditioner.

12 cl, 10 dwg

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