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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 the prior art that it is difficult to accurately control the flow rate of 0 pulses and cannot make full use of the pulses in the small opening area.

Method used

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no. 1 approach

[0046] Please refer to Figure 5 , Figure 6 . in, Figure 5 It is a structural schematic diagram of the electronic expansion valve according to the first embodiment of the present invention, Figure 6 is a schematic diagram of the 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, a first connecting pipe 12 and a second connecting pipe 13 connected to the valve seat 11 for refrigerant circulation, The top of valve seat 11 is also fixedly connected with shell 14, and in the inside of shell 14, is provided with the magnetic rotor 15 that responds to the signal of coil and rotates, and the screw mandrel 16 that is fixedly connected with magnetic rotor 15, and cooperates with screw mandrel, wire The rotational movement of the rod is converted into the lifting movement of the nut 1...

no. 2 approach

[0059] Please refer to Figure 10 , Figure 10 It is a schematic diagram of the cooperation structure between 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 conical surface 221, a straight portion 222, and a second valve port conical surface 223 arranged in sequence, wherein the straight portion 222 is generally in the shape of Cylindrical, the first taper surface 221 of the valve port and the second taper surface 223 of the valve port both extend along the axial direction away from the straight portion 222 , and gradually increase the inner diameter, thereby forming an inner taper shape. The junction of the first taper surface 221 of the valve port and the straight portion 222 forms a junction line, and the plane where it is located is the second plane N2. ...

no. 3 approach

[0064] Please refer to Figure 11 , Figure 11 It is a schematic diagram of the coordination structure between 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 with the screw rod, a first valve needle cone surface 212 connected with the main body section 211 and a valve needle cone surface 212 connected with the first valve needle cone surface 212 . The second valve needle cone surface 213 and the third valve needle cone surface 214 can be set according to the requirement of flow regulation.

[0066] The valve port 32 is generally a hollow cylindrical straight section 321 without any conical surface. The maximum diameter of the second needle conical surface 213 is larger than the inner diameter of the straight section 321 . The top of the valve port defines a second p...

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PUM

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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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