Controllable throttling device
(57) Abstract:Usage: refrigeration and can be used to regulate the degree of filling of the evaporator with the refrigerant. The inventive controllable throttling device consists of a sealed cylindrical housing with mechanical input and output channels, and also accommodated in the housing movable ferromagnetic regulatory body, the stroke limiter in the form of a fixed orifice plates installed in the entrance channel, sectional electromagnetic coil covering the housing, a temperature sensor and a control device. The movable body in the form of ferromagnetic bullet with a through axial channel, a stabilizer at the tail end, a nose portion which is made in the form of a truncated cone, paired with the surface of the fixed washer input channel, while the ferromagnetic slug spring-loaded, and the control signal from the control unit to the sectional electromagnetic coil. 1 C.p. f-crystals, 2 Il. The invention relates to refrigeration and can be used to regulate the degree of filling of the evaporator with refrigerant.Known regulator microemulator does not have sufficient reliability due to possible freezing of moisture in the exhaust holes regulating needle.The prototype is controlled throttling device (OUD), containing a cylindrical housing with input and output channels with protective washers and the control coil, the space between which floats capsule with elastic shell and ferromagnetic bullets, between which is antifreeze. As forming the shell under the action of the coil cross-section of the throttle is changed.The presence of an elastic membrane (Teflon FT-4 or from a material based on rubber) leads to a significant reduction of the service life. Due to repeated deflections of the elastic membrane may cause cracks, leaks leads to loss of coolant, and hence the operability of the throttling device.The purpose of the invention is to enhance reliability. This objective is achieved in that in a controlled throttling device containing a sealed enclosure with mechanical input and output channels, and also accommodated in the housing movable ferromagnetic regulatory body, the restrictor in the form of a fixed orifice plates installed in the entrance channel, sectional electromagnetic coil covering the housing, the sensor temperature is m, the stabilizer at the tail and nose are made in the form of a truncated cone, paired with surface fixed throttle washer input channel.Another difference is that the ferromagnetic spring-loaded bullet.These constructional features not described in the known sources of scientific, technical and patent information, and the proposed solution meets the criterion of "significant differences".In Fig. 1 shows the device in a state minimum cooling power; Fig.2 diagram of the control device.The device shown in Fig.1, consists of a sealed cylindrical housing 1 with mechanical input and output channels 2, the stroke limiter in the form of a throttle washers 3 and 4, sectional electromagnetic coil 5, covers the body, the ferromagnetic bullet 6 with a through axial channel, the tail part which contains the stabilizer 7 and the nose in the form of a truncated cone is associated with a fixed throttling washer input channel 2, a sensor 8 temperature (Fig.2), the control device 9. In addition, in the case of de-energizing the electromagnetic sectional coil ferromagnetic bullet in tori no current in the coil, the refrigerant flows through the throttle device 3, ferromagnetic slug 6 is not included in the throttle washer, which corresponds to the maximum opening of the throttle, i.e., the maximum flow rate of the refrigerant. When reducing the heat load of the refrigeration unit the signal from the temperature sensor 8 is supplied to the control device 9 and the winding of the electromagnetic coil is fed a certain tension, which uses well-known regularization scheme.The magnetic forces of the bullet is drawn partially into the gap of the orifice plates 3, its position is determined by the equality of forces of the magnetic field and the flow resistance of the refrigerant. In this case, one part of the refrigerant is throttled in the gap between the movable slug 6 and the fixed throttle washer 3, and the other in the axial channel of the bullet.In the case of reducing the cooling capacity to the minimum level to the coil is automatically given this tension, in which the ferromagnetic slug 6 completely covers throttling washer 3. In this case, the refrigerating agent is choked in the axial channel. The selection voltage is regulating device 9 on the basis of the signal from the temperature sensor 8.Device with spring-loaded bullet works as follows.HT coolant is expanded in the axial channel. When voltage is applied from the control unit of the magnetic forces pull the ferromagnetic bullet from throttling washer, increasing the flow rate of the refrigerant.To prevent full of ice formation on the surface and in the axial channel 6 bullets or disturbing thermal regime on the section of the coil 5 is supplied with high-voltage pulse. Coil jerks around along the stream and back, resulting in the destruction of the crust of ice, and a sharp increase in the consumption of the agent leads to defrost the remaining pieces of ice on the inner surface of orifice plates in the axial channel of the mobile bullets 6.Feasibility and economic effect of the use of the invention in a simplified maintenance, simple design, no elastic membrane subjected to repeated deformation and the increase in the duration of uptime. 1. CONTROLLABLE THROTTLING DEVICE containing a sealed cylindrical housing with end input and output channels, and also accommodated in the housing movable ferromagnetic regulatory body, the restrictor in the form of a fixed orifice plates installed in the entrance channel, sectional electr to improve reliability, the movable body in the form of ferromagnetic bullet with a through axial channel, a stabilizer at the tail and nose are made in the form of a truncated cone, paired with the surface of the fixed orifice plates of the input channel.2. The device under item 1, characterized in that the ferromagnetic spring-loaded bullet.
FIELD: cooling equipment, particularly to control coolant flow.
SUBSTANCE: flow regulator is formed of capillary tubes serially connected one to another and having different inner diameters and lengths. The capillary tubes are arranged so that capillary tube having greater diameter is installed before one having lesser diameter in direction of coolant flow from cooling unit condenser.
EFFECT: increased efficiency of cooling unit operation in cooling and heat pump regimes, as well as simplified manufacturing and computation.
FIELD: heating; refrigerating or freezing plants.
SUBSTANCE: closed refrigerating circuit comprises compressor (1), condenser (2), evaporator (4), receiver (9), capillary tube (8) between condenser and receiver, capillary tube (10) between receiver and evaporator and thermal contact (11) between suction pipeline and receiver. Suction pipeline is oriented so that sucked gas passes through receiver from its lower part to upper part. Cooling agent in receiver flows from its upper part to lower part. There is thermal contact (12) between suction pipeline and capillary tube (8), which connects condenser and receiver.
EFFECT: superheating of sucked gas, prevention of water condensation in suction pipeline and increased efficiency factor.
2 cl, 3 dwg
FIELD: instrument making.
SUBSTANCE: invention relates to refrigerating equipment. The proposed refrigerating unit incorporates consecutively mounted device to increase operating medium temperature and pressure, condenser, throttling device and evaporator. It comprises additional pipeline with its input connected to aforesaid device that serves to increase operating medium temperature and pressure and output connected to condenser output and throttling device input. Aforesaid additional pipeline is fitted parallel to the said condenser and furnished with superheated vapor metered-feed device that receives the said superheated vapor from the device to increase operating medium temperature and pressure. The superheated vapor metered-feed device represents a jet, electromagnetic valve, or servo-drive gate.
EFFECT: increased refrigeration ratio.
2 cl, 4 dwg
SUBSTANCE: cooling loop (2) for circulation of coolant in preliminary specified direction of flow contains in the direction of flow heat-eliminating heat exchanger (4), throttle valve (8) of evaporator, evaporator (10), compressor (22), internal heat exchanger (16), "cold face" of which is located between evaporator (10) and compressor (22), sensor (24) of temperature on inlet, located between evaporator (10) and internal heat exchanger (16), and sensor (26) of temperature on inlet, located between internal heat exchanger (16) and compressor (22), and control device (28) for control of throttle valve (8) of evaporator on the basis of measurements by temperature sensors on outlet and inlet. Control device is implemented with ability of control by throttle valve (8) of evaporator on the basis of installation of temperature on outlet in sensor (24) of temperature on inlet and shift of temperature installation on outlet on the basis of measurement by sensor (26) of temperature on outlet.
EFFECT: providing of adaptation of cooling loop to different conditions of operation in winter and summer modes.
12 cl, 1 dwg
SUBSTANCE: proposed invention relates to a refrigerating unit with a throttle pipe (1) and a suction pipe (2) for cooling agent; the throttle pipe (1) in the first point (A) of the suction pipe (2) is inserted into the suction pipe (2) and connected to it. The throttle pipe (1) and the suction pipe (2) are interconnected in another, second point (B) of the suction pipe (2) where the outer surfaces of the throttle pipe (1) and the suction pipe (2) are contacting. As per the invention the outer surfaces of the throttle pipe (1) and the suction coil (2) in the second point (B) are interconnected by ultrasonic welding. The proposed invention relates also to the method of connection of the throttle pipe (1) and the suction pipe (2).
EFFECT: application of the invention allows for the cheap and simple protection of the throttle pipe against crumpling at the point of insertion into the suction pipe.
6 cl, 1 dwg
FIELD: heating systems.
SUBSTANCE: suction orifice tube intended for refrigerating device includes suction tube (13) routed parallel to suction tube (13), orifice tube (14) and adhesive tape (19), the middle strip (20) of which is bonded to orifice tube (14), and two side strips (21, 22) enveloping middle strip (20) are bonded to suction tube (13) and covered on suction tube (13) from the side opposite to orifice tube (14). Free end of side strip (21, 22) is sealed with plastic or elastic mixture. Suction orifice tube manufacturing device has at least the first and the second roller (1, 2; 3, 4; 5, 6; 7, 8), the circles of which face each other and form clearance (15, 24); at that, at least on circumferential surface of the first roller (1; 3; 5; 7) there is slot (10, 25) for suction tube for directing suction tube (13) through clearance (24), and at slot bottom (10, 25) for suction tube there formed is slot (12) for orifice tube for directing orifice tube (14) in contact with suction tube (13).
EFFECT: use of invention will allow increasing resistance of suction orifice tube.
9 cl, 8 dwg
SUBSTANCE: cooling circuit for circulation of carbon dioxide as cooling agent in it has the first expansion device for expansion of cooling agent from high pressure to intermediate pressure and the second expansion device for expansion of cooling agent from intermediate pressure to evaporation pressure. The first expansion device is made in the form at least of two in-parallel connected valves (a, b, c, d) so that in case of failure in the valve (a) or at the valve (a) the latter is switched off, and at least one of the remaining operating valves (b, c, d) continues providing the controlled operation of cooling circuit.
EFFECT: use of invention excludes the need for switching off the whole cooling circuit in case of failed valve.
13 cl, 1 dwg
FIELD: power industry.
SUBSTANCE: thermal-pipe steam-ejector cooling machine includes evaporation chamber of high pressure, which is connected to nozzle inlet of ejector. Receiving chamber of ejector is connected to evaporation chamber of low pressure. Diffuser is connected to condensation chamber equipped with wick. Evaporation chambers of high and low pressure are placed coaxially in one housing, their side walls are covered from the inside with wicks covered in their turn with casings with gaps at upper and lower edge walls. Evaporation chambers are divided between each other as to steam with horizontal partition connected to casing of evaporation chamber of high pressure. Inside evaporation chamber of high pressure there located is entrainment trap and receiving pipeline connected to distributing pipeline located in evaporation chamber of low pressure. After horizontal partition, the housing is equipped on the lateral side with vertical partitions after which there placed are condensing chambers covered from the inside with their wicks separated between each other with a partition into high-pressure segment and low-pressure segment. Ejectors are mounted into vertical partitions of condensing chambers and connected with their nozzle inlets to evaporation chamber of high pressure through distributing and receiving pipelines.
EFFECT: increasing efficiency of thermal-pipe steam-ejector cooling machine.
FIELD: machine building.
SUBSTANCE: cooling or heating system contains at least compressor (2), condenser (4), adjusting device (17A), evaporator (20) and control device (7A). Control device (7A) receives liquid from condenser (4) and has an outlet orifice into pipeline (9) for condensate and inlet facilities coming into signal channel (6, 10). Pipeline (9) for condensate is coupled with adjusting device (17A). Control facilities (12, 13) are connected to the signal channel for control over adjusting device (17A) opening. The system is equipped with evaporating facilities (8, 11, 18, 34) for evaporation of liquid coming into signal channel (6, 10). Control device (7A) is installed in the condenser or near inlet orifice of condenser (4), owing to which the said control is actuated with amount of liquid evaporated in signal channel (6, 10).
EFFECT: reduced losses of power.
17 cl, 7 dwg
SUBSTANCE: disclosed is a method of calibrating an overheating sensor (5) for a refrigeration system, according to which: the amount of liquid coolant in the evaporator (1) is increased, for example, by increasing the degree of opening of the control valve (3); at least one parameter, for example, temperature of the coolant coming out of the evaporator (1), is monitored, from which the overheating value of the coolant can be determined; the possibility of reducing said parameter is provided; when the value of the monitored parameter is set at an essentially constant level, the corresponding overheating (SH) value is taken as zero; the overheating sensor (5) is calibrated in accordance with said level at which the overheating value (SH) is equal to zero. A constant level of the value of said parameter indicates that the liquid coolant can pass through the evaporator (1) and, consequently, the overheating value of the coolant at the outlet of the evaporator (1) is equal to zero.
EFFECT: disclosed method enables to calibrate an overheating sensor at the operating site of the refrigeration system, owing to which there is no need to calibrate said sensor at the manufacturing plant and, as a result, the need to monitor conformity of calibration data of a particular sensor.
11 cl, 10 dwg