CN216557791U

CN216557791U - Air conditioner expansion valve of low deviation

Info

Publication number: CN216557791U
Application number: CN202123160901.1U
Authority: CN
Inventors: 鲁凡
Original assignee: Shenzhen Nuotei Electromechanical Equipment Co ltd
Current assignee: Shenzhen Nuotei Electromechanical Equipment Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-05-17
Anticipated expiration: 2031-12-15

Abstract

The utility model relates to a low-deviation air-conditioning expansion valve which comprises a T-shaped pipe, wherein one end of the T-shaped pipe is a piston pipe with a sealed end, the other end of the T-shaped pipe is a liquid inlet pipe, the other end of the T-shaped pipe is a liquid outlet pipe, a screw rod motor and a piston are arranged in the piston pipe, the screw rod motor is in transmission connection with the piston, the piston can block the liquid inlet pipe and the liquid outlet pipe under the driving of the screw rod motor, a pressure relief through hole which is communicated with the piston pipe and the liquid inlet pipe or the piston pipe and the liquid outlet pipe is formed in the piston pipe, a flow sensor is arranged on the liquid outlet pipe, a control circuit board is arranged at the end part of the piston pipe, and the screw rod motor and the flow sensor are both electrically connected with the control circuit board. The utility model discloses a through the flow sensor from the area, pressure sensor's data feedback real time control electronic expansion valve's aperture, can greatly reduce the deviation, and set up the control mechanism of electronic expansion valve in the pipeline, prevent that the refrigerant from revealing.

Description

Air conditioner expansion valve of low deviation

Technical Field

The utility model relates to the technical field of expansion valves, in particular to a low-deviation air conditioner expansion valve.

Background

The throttling mechanism is one of the important parts in the refrigerating device, and has the functions of throttling saturated liquid (or supercooled liquid) under the condensing pressure in a condenser or a liquid receiver, reducing the throttled liquid to the evaporation pressure and the evaporation temperature, and simultaneously regulating the flow of refrigerant entering an evaporator according to the change of load.

The electronic expansion valve is a comparatively intelligent throttle mechanism, and the electronic expansion valve has the advantages that: the flow regulating range is large, the control precision is high, the intelligent control is applicable, and the quick change of the refrigerant flow with high efficiency can be applicable. The opening of the electronic expansion valve can be adapted to the rotating speed of the compressor, so that the amount of the refrigerant conveyed by the compressor is matched with the liquid supply amount of the valve, the capacity of the evaporator is exerted to the maximum extent, and the optimal control of the air-conditioning refrigeration system is realized.

However, since the piston is fixed by a threaded structure, the position of the piston may be changed and deviated due to vibration during transportation or use, or impurities and moisture are brought into the electronic expansion valve by the refrigerant to cause deviation of the electronic expansion valve, and the control mechanism of the conventional electronic expansion valve is arranged outside the pipeline, so that the problem of air tightness is easily caused under the condition of long service time or severe service environment, and the refrigerant is leaked.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing defects, the utility model provides an air conditioner expansion valve with low deviation.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides an air conditioner expansion valve of low deviation, includes the T venturi tube, the piston tube that the one end of T venturi tube was sealed for the tip, the other end of T venturi tube is the feed liquor pipe, the other end of T venturi tube is the drain pipe in addition one end, be equipped with lead screw motor, piston in the piston tube, lead screw motor and piston transmission are connected, the piston can be with feed liquor pipe and drain pipe separation under lead screw motor's drive, set up the pressure release through-hole that feeds through piston tube and feed liquor pipe or intercommunication piston tube and drain pipe on the piston, be equipped with flow sensor on the drain pipe, piston tube tip is equipped with control circuit board, lead screw motor, flow sensor all are connected with control circuit board electricity.

Preferably, the piston is provided with a pressure relief hole which is communicated with the piston tube and the liquid outlet tube.

Preferably, the piston is provided with a limiting through hole, the screw rod motor extends to form a limiting rod parallel to a screw rod of the screw rod motor, and the limiting rod penetrates through the limiting through hole.

Preferably, an insulating block is arranged between the screw rod motor and the piston, and the insulating block is connected with the piston pipe in a sealing mode.

Preferably, the screw motor is one of a screw stepping motor and a screw stepping speed reduction motor.

Preferably, filter screens are arranged in the liquid inlet pipe and the liquid outlet pipe.

Preferably, the liquid inlet pipe and the liquid outlet pipe are both connected with a movable connector in a sealing manner.

The utility model has the beneficial effects that: the utility model discloses a combine flow sensor, pressure sensor and electronic expansion valve to be in the same place, through the aperture of feedback real time control electronic expansion valve, can greatly reduce the deviation, and set up the control mechanism of electronic expansion valve in the pipeline, the problem of gas tightness appears in avoiding that can be fine reduces the deviation, prevents that the refrigerant from revealing, very big extension electronic expansion valve's life.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

part names and serial numbers in the figure: 1-piston tube 11-screw motor 12-piston 121-limit rod 13-insulating block 2-liquid inlet tube 21-filter screen 22-loose joint 3-liquid outlet tube 31-flow sensor 4-control circuit board.

Detailed Description

To more clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention. In addition, directional terms used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer to directions only as shown in the attached drawings, and are used for better and clearer explanation and understanding of the present invention, and do not indicate or imply orientation which the present invention must have, and thus, should not be construed as limiting the present invention.

The embodiment of the utility model is shown in figure 1, a low-deviation air-conditioning expansion valve comprises a T-shaped pipe, one end of the T-shaped pipe is a piston pipe with a sealed end, the end of the piston pipe 11 is sealed to prevent refrigerant leakage, the other end of the T-shaped pipe is a liquid inlet pipe, the other end of the T-shaped pipe is a liquid outlet pipe, preferably, the liquid inlet pipe 2 and the liquid outlet pipe 3 are both vertical to the piston pipe 11, further preferably, the piston pipe 11 is parallel to the liquid inlet pipe 2/the liquid outlet pipe 3, a screw rod motor and a piston are arranged in the piston pipe, the piston 12 can move along the axial direction of the piston pipe 11, the screw rod motor is in transmission connection with the piston, when the screw rod motor 11 works, the screw rod motor 11 can control the piston 12 to move along the axial direction of the piston pipe 11, the piston can block the liquid inlet pipe and the liquid outlet pipe under the driving of the screw rod motor, the screw rod motor 11 can further control the size of a communication opening between the liquid inlet pipe 2 and the liquid outlet pipe 3 by controlling the piston 12, the piston is provided with a pressure relief through hole which is communicated with the piston tube and the liquid inlet tube or the piston tube and the liquid outlet tube, the pressure relief through hole can balance the pressure at the two ends of the piston 12 and reduce the obstruction when the piston 12 moves due to uneven pressure at the two ends of the piston 12, the liquid outlet tube is provided with a flow sensor, the flow sensor 31 can detect the flow of the refrigerant in the liquid outlet tube 3 so as to determine the size of a communication opening between the liquid inlet tube 2 and the liquid outlet tube 3 controlled by the lead screw motor 11, thereby the capacity of the evaporator is exerted to the maximum extent and the optimal control of the air-conditioning refrigeration system is realized, the end part of the piston tube is provided with a control circuit board, the lead screw motor and the flow sensor are both electrically connected with the control circuit board, the pressure sensor 21 arranged in the outlet of the evaporator can obtain the outlet pressure of the evaporator and feed the information back to the control circuit board 4, thereby eliminating the influence caused by the flow resistance in the coil tube of the evaporator, the capacity of the evaporator is exerted to the maximum extent.

Further improvement, the pressure relief hole that sets up on the piston 12 communicates piston tube 1 and drain pipe 3, and pressure relief hole intercommunication piston tube 1 and drain pipe 3 can make less refrigerant get into piston tube 1, reduce the influence to guaranteeing lead screw motor 11.

Further improvement, as shown in fig. 1, a limiting through hole is formed in the piston 12, a limiting rod 121 which is horizontal to a screw rod of the lead screw motor 11 extends, the limiting rod 121 penetrates through the limiting through hole, and the piston 12 can be prevented from rotating in the piston tube 11 through the matching of the limiting rod 121 and the limiting through hole, so that the lead screw motor 11 can better control the piston 12, and errors are reduced.

In a further improvement, as shown in fig. 1, an insulating block 13 is arranged between the screw motor 11 and the piston 12, the insulating block 13 is connected with the piston tube 1 in a sealing manner, and the insulating block 13 can prevent refrigerant from entering the screw motor 11, reduce the influence of the refrigerant on the screw motor 11, and reduce errors.

In a further improvement, as shown in fig. 1, the screw motor 11 is one of a screw stepping motor and a screw stepping deceleration motor, and the stepping motor has high precision, fast response speed and long service life, and is suitable for the scene.

Further improvement, as shown in fig. 1, filter screens 21 are arranged in the liquid inlet pipe 2 and the liquid outlet pipe 3, impurities and moisture in the refrigerant need to be filtered before the refrigerant enters the throttling device for throttling and pressure reduction, otherwise, the refrigeration system has poor refrigeration effect, and the influence of the impurities and the water on the refrigeration system can be reduced by increasing the filter screens 21.

In a further improvement, as shown in fig. 1, the liquid inlet pipe 2 and the liquid outlet pipe 3 are both connected with a movable joint 22 in a sealing manner, and the movable joint 22 can be detachably connected with other parts of the refrigeration system, so that the refrigeration system is convenient to maintain.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.

Claims

1. A low deviation air conditioner expansion valve is characterized in that: including the T venturi tube, the one end of T venturi tube is the piston tube that the tip sealed, the other end of T venturi tube is the feed liquor pipe, the one end in addition of T venturi tube is the drain pipe, be equipped with lead screw motor, piston in the piston tube, lead screw motor and piston transmission are connected, the piston can be with feed liquor pipe and drain pipe separation under lead screw motor's drive, set up the pressure release through-hole that feeds through piston tube and feed liquor pipe or intercommunication piston tube and drain pipe on the piston, be equipped with flow sensor on the drain pipe, piston tube tip is equipped with control circuit board, lead screw motor, flow sensor all are connected with control circuit board electricity.

2. The expansion valve of claim 1, wherein the piston is provided with a pressure relief hole for communicating the piston tube and the outlet tube.

3. The expansion valve of claim 1, wherein the piston has a through hole, and the screw motor has a rod parallel to the screw, and the rod is inserted into the through hole.

4. The expansion valve of claim 1, wherein an insulating block is disposed between the screw motor and the piston, and the insulating block is hermetically connected to the piston tube.

5. The expansion valve of claim 1, wherein the screw motor is one of a screw stepping motor and a screw stepping deceleration motor.

6. The expansion valve of claim 1, wherein the inlet and outlet pipes are provided with filter screens.

7. The expansion valve of claim 1, wherein the inlet and outlet pipes are sealed with movable joints.