Adjustable throttle device

 

(57) Abstract:

Adjustable throttle device for liquid refrigerant includes a housing with connections for supplying liquid refrigerant and drainage of the liquid-vapor mixture. Fixed capillary tube connected to the pipe outlet. In the device consistently are perforated tube, guide tube covering the outside of the perforated tube, and a movable capillary tube, connected through the nozzle from the guide tube and put in a stationary guide tube. External magnetic coil placed on the body. On the guide tube fixed magnetic coil and the support ring. The support ring rests on the spring. The body is made channels, communicating respectively with the steam cavity between the casing and the stationary capillary tube and nozzle for steaming. The use of the invention will allow to expand the area of controlling the flow of liquid refrigerant and refrigerant boiling point. 3 Il.

The invention relates to refrigeration equipment, namely, equipment for refrigerating machines, and can be used in small and medium refrigeration machines used in all fields of technology.

The disadvantages of the known device should be attributed not wide enough area of regulating the flow of liquid hedging.

Known capillary tube for throttling the liquid refrigerant (see A. C. 1267135) with nozzles for supplying liquid refrigerant and drainage of the liquid-vapor mixture, which is part of the length is made with evenly spaced or, to regulate the boiling temperature of the refrigerant by changing the hydraulic resistance is bent in the form of a loop with the location of pinches on its inner side, while the nozzles supplying liquid refrigerant and drainage of the liquid-vapor mixture is installed with the possibility of a counter move.

The disadvantage of this device should include a limited area of regulating the flow of liquid refrigerant, the possibility of a counter-movement of the nozzles supplying liquid refrigerant and drainage of the liquid-vapor mixture is also limited h is not adjustable.

Known adjustable throttle device (see patent GB 1 the author capillary tube, connected to the pipe outlet.

The disadvantage of this device is the lack of zone controlling the flow of liquid refrigerant, while the length and diameter of the stationary capillary tubes and nozzles for supplying liquid refrigerant and drainage of the liquid-vapor mixture is permanent and is not adjustable.

The present invention is directed to the solution of the technical problem consisting in the extension zone, controlling the flow of liquid refrigerant and the temperature of the boiling refrigerant by changing the value of the hydraulic resistance of the capillary tube due to the regulation of its length.

The problem is solved so that the adjustable throttle device for liquid refrigerant, comprising a housing with connections for supplying liquid refrigerant and drainage of the liquid-vapor mixture and a fixed capillary tube connected to the pipe outlet, additionally made in the form of consecutive perforated tube, the guide tube covering the outside of the perforated tube, and a movable capillary tube connected through the nozzle from the guide tube and put in a stationary guide tube, as well as the s, and on the guide tube fixed magnetic coil and a support ring made based on the spring and the body is made channels, communicating respectively with the steam cavity between the casing and the stationary capillary tube and pipe outlet pair, which is equipped with a case.

Equipment adjustable throttle device by placing in a glass casing perforated tube, which externally covers the guide tube with fixed thereto a magnetic coil and a support ring, through a nozzle associated with a movable capillary tube that is put into a fixed capillary tube on the housing connected to the pipe outlet of the liquid-vapor mixture of refrigerant on the outer surface of the glass body is placed external magnetic coil, allows adjustable changing the total length of the capillary tube, depending on the electrical influence on the static magnetic coil and linear movement in a glass casing movable magnetic coil.

Equipment movable tube fixed support ring, which rests on the spring, working on their own compression or expansion, allows otkluchki and stationary tubes depending on the operating conditions of the refrigeration machine, part of which is inserted an adjustable throttle tube.

Execution in the case of channels, which communicate, respectively, a steam chamber between the casing and the stationary capillary tube and between the housing and the movable capillary tube with a pipe outlet pair, which is equipped with a housing, allows a power outage stationary magnetic coils, to ensure equality of pressure in the regulated throttle device and the capacitor, which simplifies operation conditions.

The figure 1 shows a longitudinal section of an adjustable throttle device, in figures 2 and 3 are schematic entry of the inventive adjustable throttle device in the circuit of the refrigeration machine.

Adjustable throttle device (figure 1) includes a housing 1 and secured on the Cup 2 of the casing, a pipe for supplying liquid refrigerant 3 and an associated perforated guide tube 4; the inside of the Cup 2 of the body is placed a movable magnetic coil 5, is placed on the guide tube 6 passing through the seal 7; outside of the Cup 2 of the housing, the external magnetic coil 8 conclusions 9, a closed casing 10.

On the guide tube 6 is fixed movable by operably 14.

In the housing 1 provided with a tapered adapter 15 and installed the bearing 16, a stationary capillary guide tube 17 and the spacer-damper 18. In the lower part of the housing 1 has an inlet 19 of the outlet of the liquid-vapor mixture of refrigerant.

In the housing 1 provided with channels 20 and 21, connected respectively with the steam cavity 22 between the housing 1 and fixed capillary guide tube 17 and the cavity 23 between the housing 1 and the movable capillary tube 14. The channels 20 and 21 is plugged tubes 24 and 25; the cavity 22 I 23 through the channels 20 and 21 are connected with the pipe outlet pair 26.

In the circuit of the refrigerating machine (figures 2, 3) in the refrigerant circuit installed evaporator 27, the compressor 28, a capacitor 29, the liquid conduit 30, an adjustable throttle device 31 (figure 1), a steam pipe 32; on the liquid line 30 is installed solenoid valve SV, steam pipe 32 is installed solenoid valve SV.

Adjustable throttle device (figures 1-3) works as follows.

The liquid refrigerant from the condenser 29 through SW pipeline 30 is supplied to the controllable throttle device 31 through the pipe 3 and the perforated tube 4 Postup; the C nozzle 13, the liquid flows sequentially moving the capillary tube 14 and the stationary capillary guide tube 17, in which, because of the hydraulic resistance to the flow of fluid, lowering the pressure and temperature of the liquid refrigerant. The liquid refrigerant passes through pipe 19 and enters the evaporator 27.

A pair of evaporated refrigerant from the evaporator 27 sucked by the compressor 28 and forced into the condenser 29, where it is condensed, passing in the liquid phase. Through SW and liquid tubing 30, the liquid refrigerant flows through the adjustable throttle device 31. The cycle is completed.

When the flow rate of the liquid refrigerant, depending mainly on the initial parameters such as pressure and temperature after the condenser, and at some time needed to deliver liquid refrigerant to the equilibrium state corresponding to the pressure and temperature in the evaporator, the determining factor is the extent of the impact on the hydraulic fluid resistance, i.e., the absolute length of the tube.

Regulation of the flow rate and parameters of the refrigerant supplied through an adjustable throttle device according to figure 1, Khujand is 17. This is achieved by the sequential inclusion of the purpose of the electric power of the external electromagnetic coil 8 and the linear (step) move "down and back" coil 5 connected to the coil 8 of the electromagnetic forces. (Communication of findings 9 coil 8 control circuit of the refrigeration machine for consistent regulation not shown).

Moving coil 5 is provided by adjusting the total length of the movable capillary tube 14 and the stationary capillary tube 17 in the interval from the minimum length when moving the capillary tube 14 is in its extreme lower position, resting on the spacer-damper 18, up to the maximum length when moving the capillary tube 14 is in its extreme upper position in the stationary capillary tube 17, defined by the high placement of the coil 5 in the coil 8.

When driving coil 5 with the tube 6 up fluid from the internal cavity of the Cup 2 of the housing through the perforations of the tube 4 is returned into the tube 6. When moving tube 6 "up - down - up ring 11 communicates with the spring 12. The nature of the interaction of the ring 11 with the spring 12 is determined by the mode of operation of the refrigeration machine, which works adjustable capillaria 29 and drain all of the liquid refrigerant in the evaporator 27 (figure 2);

a partly flooded condenser 29 and unflooded evaporator 27 (figure 3).

When stopping of the compressor 28 of the refrigeration machine is stationary magnetic coil 8 is disconnected from the power line.

Mode with dry capacitor, the spring 12 returns the ring 11 and an associated tube 6 to the lowest position. In this case, the spring 12, running on its own compression. When the compressor stops 28 (see figure 2) open SW and SW. Liquid refrigerant passes from the condenser 29 in the evaporator 27.

Through the pipe 32 at the open SW cavity 22 and 23 through the pipe 26 are reported in the condenser 29, providing in the entire scheme of refrigerating machines identical pressure.

When starting the compressor 28 is closed SW and SW, the coil 8 is supplied to the power supply. Pairs of high-pressure refrigerant through the channels 20, 21, 22 and through the gap between the tubes 14 and 17 enters the evaporator 27 and sucked by the compressor 28.

The machine operates in the normal mode, the accumulation of refrigerant in the condenser and metered supply of liquid refrigerant to the evaporator 27 depending on the heat load.

In partially flooded condenser arena, the spring 12 is open at its radiatia. When the compressor stops 28 (see figure 3) is closed SW and open CV. No liquid refrigerant passes from the condenser 29 in the evaporator 27.

Through the pipe 32 at the open SW cavity 22 and 23 through the pipe 26 are reported in the condenser 29, providing in the entire scheme of refrigerating machines identical pressure.

When starting the compressor 28 is opened SW and closes SW, the coil 8 is supplied to the power supply. Pairs of high-pressure refrigerant through the channels 20, 21, 22 and through the gap between the tubes 14 and 17 enters the evaporator 27 and sucked by the compressor 28. The machine operates in the normal mode, the accumulation of refrigerant in the condenser and metered supply of liquid refrigerant to the evaporator 27 depending on the heat load.

Thus, the inventive adjustable throttle device, in comparison with the known, allows you to:

depending on the initial parameters such as pressure and temperature after the condenser and at some time needed to deliver liquid refrigerant to the equilibrium state corresponding to the pressure and temperature in the evaporator, to provide flow control and parameters of the refrigerant at brainy, working on your own compression or expansion, to ensure the device is used in the circuits of refrigeration machines with dry or flooded condenser.

Adjustable throttle device for liquid refrigerant, comprising a housing with connections for supplying liquid refrigerant and drainage of the liquid-vapor mixture and a fixed capillary tube connected to the pipe outlet, characterized in that the device is equipped with a successive perforated tube, the guide tube covering the outside of the perforated tube, and a movable capillary tube connected through the nozzle from the guide tube and put in a stationary guide tube and the outer magnetic coil placed on the housing, and a spring operating on its own compression or extension, and a guide tube fixed magnetic coil and the support ring, performed based on the spring and the body is made channels, communicating respectively with the steam cavity between the casing and the stationary capillary tube and pipe outlet pair, which is equipped with a case.

 

Same patents:

Evaporative unit // 2185577
The invention relates to evaporative unit with at least two spaced each other with a serial connection, loaded from the compressor with the refrigerant through the injection site evaporators different cooling capacity, and the lower evaporator cooling capacity is made in the form of a sheet, while the evaporator is higher cooling capacity equipped with a pipe serving to guide the refrigerant, and is connected in series before the lower evaporator cooling capacity

The invention relates to refrigeration and can be used to regulate the degree of filling of the evaporator refrigerant

The invention relates to refrigeration and can be used in vapor compression refrigeration systems (PHU) for various purposes to regulate the flow of liquid refrigerant in the cycle with simultaneous throttling

The flow of fluid // 2005966
The invention relates to refrigeration, and controls the flow of liquid or gas passing through the heat exchangers, mainly refrigeration units and systems

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.

2 dwg

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

Refrigerating unit // 2362095

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

FIELD: mechanics.

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

FIELD: heating.

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

FIELD: heating.

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.

5 dwg

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

FIELD: physics.

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

Up!