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Balance part sealing structure for bidirectional thermal expansion valve

A thermal expansion valve and sealing structure technology, applied in shaft seals, valve details, valve devices, etc., can solve the problems of poor sealing performance, large temperature deviation and complex structure of thermal expansion valves, and achieve good sealing performance and temperature sensing. Reliable, highly adjustable effect

Inactive Publication Date: 2007-10-03
ZHEJIANG CHUNHUI INTELLIGENT CONTROL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing thermostatic expansion valves used for throttling in vapor compression heat pump systems can only work in one direction due to structural design defects that make the thermostatic expansion valves have poor sealing performance
And it is external temperature sensing, that is, use an external temperature sensing tube to sense the temperature, and the temperature sensing tube is connected to the bellows through the connecting tube, so the temperature sensing deviation is large
In order to solve the two-way work, a throttling device consisting of two thermal expansion valves and two one-way valves, or one thermal expansion valve and four one-way valves is adopted. Although it can effectively achieve two-way throttling, the structure is relatively complicated and the cost is low. high

Method used

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  • Balance part sealing structure for bidirectional thermal expansion valve
  • Balance part sealing structure for bidirectional thermal expansion valve
  • Balance part sealing structure for bidirectional thermal expansion valve

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Embodiment Construction

[0015] The present invention mainly consists of a valve body 3 with a membrane box 2 and a gas return passage 4 at the upper end, an air inlet and return pipe 9 and an air return pipe 10 placed at the left and right ends of the air return passage 4, and a liquid inlet pipe 7 placed at the lower part of the valve body 3. The liquid inlet hole 5, the liquid outlet hole 6 with the liquid outlet pipe 8, the valve core 18 placed between the liquid inlet hole 5 and the liquid outlet hole 6, and the balance spring 19 with the adjustment screw 20 placed under the valve core 18 , the transmission rod 15, the centering steel ball 13, and the valve needle 16 placed between the bellows 2 and the valve core 18, the positioning block 14 with the rubber sealing ring 17 of the balance part embedded in the bottom of the return air passage 4 of the valve body 3 , The seal nut 23 placed at the bottom of the valve body 3 etc. constitutes.

[0016] Accompanying drawing 1, 2, 3, 4, 5, 6 are the cro...

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Abstract

The balance part sealing structure for bi-directional thermal expansion valve belongs to the field of throttle device technology for steam compressing heat pump system. The balance part sealing structure consists of mainly the upper valve body with diaphragm box and gas returning channel, inlet gas returning pipe and outlet gas returning pipe on two ends of the gas returning channel, liquid inlet hole and liquid outlet hole in the lower part of the valve body, valve core between the liquid inlet hole and the liquid outlet hole, balance spring with regulating screw, transfer part between the diaphragm box and the valve core, centering steel ball, valve needle, positioning block with sealing rubber ring, sealing nut, etc. The present invention has reasonable design, simple structure, bi-directional operation, excellent sealing performance, good temperature sensing performance and high regulating sensitivity.

Description

technical field [0001] The invention relates to a sealing structure of a balance part of a bidirectional thermal expansion valve, and belongs to the technical field of throttling devices for vapor compression heat pump systems. Background technique [0002] The existing thermal expansion valve used for throttling of the vapor compression heat pump system can only work in one direction due to structural design defects that make the thermal expansion valve have poor sealing performance. And it is an external temperature sensing, that is, an external temperature sensing tube is used to sense the temperature, and the temperature sensing tube is connected with the bellows through a connecting tube, so the temperature sensing deviation is large. In order to solve the two-way work, a throttling device consisting of two thermal expansion valves and two one-way valves, or one thermal expansion valve and four one-way valves is adopted. Although it can effectively r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K41/02
Inventor 邓永林顾其江
Owner ZHEJIANG CHUNHUI INTELLIGENT CONTROL
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