Electronic expansion valve

A technology of electronic expansion valve and valve needle, which is applied in the direction of lifting valve, valve device, valve details, etc., can solve the problems of increasing the risk of system leakage, complex controller, and increasing system assembly cost, so as to reduce the risk of leakage, The effect of reducing the assembly process and reducing the overall cost

Active Publication Date: 2013-09-11
EMERSON CLIMATE TECH (SUZHOU) CO LTD
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  • Abstract
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Problems solved by technology

[0004] However, adopting the above structure, on the one hand, the overall cost of the system is increased due to the addition of an independent electromagnetic switch valve, and on the other hand, in order to connect the electromagnetic switch valve in series, two brazing points will be added in the pipeline (that is, The inlet and outlet of the electromagnetic switch valve), which not only increases the assembly cost of the system but also increa...

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  • Electronic expansion valve
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Embodiment Construction

[0057] The following description of preferred embodiments is exemplary only and in no way restricts the invention and its application or usage.

[0058] first refer to Figure 1-4 The configuration of the electronic expansion valve according to the first embodiment of the present invention is described.

[0059] The electronic expansion valve 1 according to the present invention may include a valve part 10 for regulating the flow rate of fluid flowing through the electronic expansion valve and an electromagnetic holding mechanism 60 for holding and releasing the actuator in the valve part 10 .

[0060] Specifically, the valve component 10 may include a valve body 12 . The valve body 12 is provided with an inlet 12 - 1 connected to the inlet pipe 14 and an outlet 12 - 2 connected to the outlet pipe 16 . A valve seat 18 may be provided at the outlet 12 - 2 of the valve body 12 . The electronic expansion valve 1 may further include a valve needle 24 capable of opening and clos...

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Abstract

The invention relates to an electronic expansion valve (1) which comprises a valve part (10) used for adjusting fluid flow. The valve part (10) comprises a valve body (12), a valve seat (18) arranged in the valve body, a valve needle (24) capable of opening and closing the valve seat, an actuating mechanism driving the valve needle to move axially, as well as a drive mechanism for providing power for the actuating mechanism, wherein the actuating mechanism comprises a spindle (50) capable of moving axially. The electronic expansion valve further comprises an electromagnetic maintaining mechanism (60) used for maintaining the spindle, and the structure includes that when the electromagnetic maintaining mechanism is powered up, the spindle is maintained in a first axial position, and in the first axial position, the valve needle can adjust opening of the valve seat, when the electromagnetic maintaining mechanism is powered off, the spindle is released to a second axial position, and in the second axial position, the valve needle closes the valve seat. According to the invention, when a system is powered off, the electronica expansion valve can be automatically closed.

Description

technical field [0001] The invention relates to an electronic expansion valve. Background technique [0002] The electronic expansion valve is an important part in the refrigeration / heating system, mainly used to regulate the flow of refrigerant fluid. A traditional electronic expansion valve generally includes a driving mechanism (stepping motor), an actuator (threaded screw mechanism), a throttling mechanism (needle and valve seat) and related auxiliary mechanisms. [0003] However, after the traditional electronic expansion valve is powered off, the electronic expansion valve cannot be automatically closed because the threaded screw mechanism loses its driving force. Therefore, in order to safely cut off the flow path, an independent electromagnetic switch valve (usually a normally closed valve, which opens when power is turned on and closes when power is off) is usually connected in series upstream or downstream of the electronic expansion valve. In this way, when the ...

Claims

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Application Information

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IPC IPC(8): F16K31/06F16K1/00F25B41/06F25B41/34
Inventor 沈珂刘敬喜韩荣耀胡飞雪
Owner EMERSON CLIMATE TECH (SUZHOU) CO LTD
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