Electronic expansion valve

An electronic expansion valve, valve port technology, applied in the direction of lift valve, valve details, valve device, etc., can solve the problems of inability to make full use of the pulse in the small opening area, and it is difficult to accurately control the 0-pulse flow, so as to improve the consistency, The effect of expanding the adjustment range and reducing the manufacturing cost

Active Publication Date: 2015-09-23
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is to provide an electronic expansion valve, which can solve the defects in th

Method used

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  • Electronic expansion valve
  • Electronic expansion valve
  • Electronic expansion valve

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Example

[0045] The first embodiment

[0046] Please refer to Figure 5 , Image 6 . among them, Figure 5 It is a schematic diagram of the electronic expansion valve structure of the first embodiment of the present invention, Image 6 It is a schematic diagram of the valve needle structure of the electronic expansion valve in the first embodiment.

[0047] Such as Figure 5 As shown, the electronic expansion valve includes a valve body 1 and a coil (not shown in the figure). The valve body 1 includes a valve seat 11, which is connected to the valve seat 11 and is used for refrigerant circulation through a first connecting pipe 12 and a second connecting pipe 13, The upper part of the valve seat 11 is also fixedly connected with a housing 14. Inside the housing 14, a magnetic rotor 15 that rotates in response to a signal from the coil, a screw 16 fixedly connected to the magnetic rotor 15 and a screw rod are arranged to connect the wire The rotating movement of the rod is converted into a ...

Example

[0058] Second embodiment

[0059] Please refer to Picture 10 , Picture 10 It is a schematic diagram of the matching structure of the valve needle and the valve port of the electronic expansion valve according to the second embodiment of the present invention.

[0060] In this embodiment, the structure of the valve port 22 is the same as that of the first embodiment, including a first valve port cone 221, a straight section 222, and a second valve port cone 223 arranged in sequence, wherein the straight section 222 is generally Cylindrical shape, the first valve port cone surface 221 and the second valve port cone surface 223 both extend along the axial direction away from the straight section 222 and gradually increase the inner diameter to form an inner cone shape. The junction between the first valve port cone surface 221 and the straight section 222 forms a boundary line, and the plane where it is located is the second plane N2.

[0061] The valve needle 31 includes a main body...

Example

[0063] The third embodiment

[0064] Please refer to Picture 11 , Picture 11 It is a schematic diagram of the matching structure of the valve needle and the valve port of the electronic expansion valve according to the third embodiment of the present invention.

[0065] In this embodiment, the valve needle 21 is the same as the first embodiment, including a main body section 211 connected to the screw rod, a first valve needle cone surface 212 connected to the main body section 211, and a first valve needle cone surface 212 connected to the The second valve needle cone surface 213 and the third valve needle cone surface 214 can be set according to the needs of flow adjustment.

[0066] The valve port 32 as a whole is a straight section 321 that is generally hollow cylindrical without a tapered surface. The maximum diameter of the second valve needle tapered surface 213 is greater than the inner diameter of the straight section 321. The top of the valve port defines a second plane ...

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Abstract

The invention discloses an electronic expansion valve comprising an electromagnetic coil, a valve body having a valve port and a valve needle matched with the valve port to adjust flow for the electronic expansion valve. The electronic expansion valve is characterized in that the valve needle comprises a main body section, a first conical surface part adjacent to the main body section; the valve port is formed by an isometric straight section; when zero pulse is applied to the electromagnetic coil, the straight section has not contact with the valve needle; and an intersected plane between the plane where top end of the straight section lies and the valve needle is on the first conical surface part.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to an electronic expansion valve. Background technique [0002] In the technical field of refrigeration and heating, the electronic expansion valve is the refrigerant flow control part of the refrigeration and heating equipment. Refrigerant flow. [0003] In some systems, when the electronic expansion valve fails when it is fully closed, or the control system fails, if the compressor continues to run, it will cause partial vacuuming of the refrigeration circuit, which will damage the compressor or even damage the entire refrigeration system. Therefore, in these systems, fully closed electronic expansion valves with flow are gradually used to replace ordinary fully closed non-flow electronic expansion valves. , still has a certain flow rate, which can effectively avoid the problem of vacuum in the refrigeration system circuit caused by the continuous operation of t...

Claims

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Application Information

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IPC IPC(8): F16K31/06F25B41/06F16K1/32F25B41/31
CPCF16K1/00F16K1/38F16K27/0254F16K27/029F16K31/0655F25B41/31
Inventor 不公告发明人
Owner ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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