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Electronic expansion valve

A technology of electronic expansion valve and spool, which is applied in the direction of lifting valve, valve detail, valve device, etc., to avoid excessive fluid pressure

Active Publication Date: 2012-10-31
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to design a high-reliability electronic expansion valve, which can not only avoid the influence of excessive fluid pressure and fluid fluctuation on the performance of the electronic expansion valve, but also realize the function of two-way flow

Method used

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Embodiment Construction

[0047] figure 1 It is a structural schematic diagram of one of the specific embodiments of the electronic expansion valve provided by the present invention, Figure 2a and Figure 2b respectively figure 1 The front view and top view of the spool structure of the electronic expansion valve in image 3 for figure 1 Schematic diagram of the connection between the bellows of the electronic expansion valve and the support shaft.

[0048] like figure 1 , Figure 2a / Figure 2b ,and image 3 shown.

[0049] The electronic expansion valve includes a cover body 6 riveted and fixed to the valve body 3 and a drive device 4 fixed in the cover body 6. In this embodiment, it is specifically a stepping motor 41. The front end of the motor 41 is connected to a transmission shaft 42. The cooperation between the nut 43 and the transmission shaft 42 can convert the rotational motion of the motor 41 into the axial motion of the transmission shaft 42 . The detection and control modu...

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Abstract

The invention relates to an electronic expansion valve and belongs to the technical field of refrigeration control. The electronic expansion valve comprises a driving device controlled by a sensing signal, a transmission device, a valve body (3) with a first channel (31) and a second channel (32), a throttle sleeve body (1), a valve core (2), wherein the throttle sleeve body (1) is fixed on the valve body (3) and is provided with a throttle opening (11), the valve core (2) can slide relatively to the throttle sleeve body (1) under the driving the driving device so as to control the size of the throttle opening, and the throttle opening (11) is a circumferential direction opening hole which is formed in the throttle sleeve body (1). The electronic expansion valve is characterized by further comprising a corrugated pipe (8) which can form a valve cavity with the throttle sleeve body (1), wherein the valve core (2) is arranged in the valve cavity and is provided with a pressure balance through hole (24). The electronic expansion valve disclosed by the invention is suitable for bothway circulation of commercial air conditioners with large capacity, and can avoid the influence (caused by over-large fluid pressure and over-large fluid fluctuation) on the operation performances of the electronic expansion valve.

Description

technical field [0001] The invention relates to an electronic expansion valve, which is a device for controlling throttling flow by adjusting the size of an orifice, belongs to the technical field of refrigeration control, and is suitable for a two-way flow electronic expansion valve used in commercial large-capacity air-conditioning systems. Background technique [0002] As a throttling device, the electronic expansion valve is widely used in the circuit of the refrigeration system. Its function is to adjust the cooling capacity flowing into the evaporator, supply the optimum amount of refrigerant to the evaporator, and ensure the stable operation of the refrigeration system. However, in refrigeration systems, especially electronic expansion valves used in large-capacity commercial air-conditioning systems, due to the high operating pressure of the system and large throttling changes, the valve needle is required to have a long working stroke, so there are special requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/34F16K31/02F16K41/10F16K47/08
Inventor 不公告发明人
Owner ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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