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Direct acting electric valve

An electric valve, direct-acting technology, used in lift valves, valve details, valve devices, etc., can solve problems such as refrigerant leakage, failure of axial locking force, and inability to effectively ensure that the valve core position remains unchanged.

Inactive Publication Date: 2015-07-22
ZHEJIANG SANHUA CLIMATE & APPLIANCE CONTROLS GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After the direct-acting electric valve is powered off, the inherent positioning torque of the motor is transmitted to the nut and the valve core through the screw rod, so as to maintain the position of the valve core and ensure that the valve port does not leak. However, in actual work, due to vibration and other reasons, it will As a result, the transmission thread of the screw and the nut slips, causing the axial locking force transmitted by the motor to the nut and the valve core through the screw to fail, so that it is impossible to effectively ensure that the position of the valve core remains unchanged, and the position of the valve core will inevitably change lead to refrigerant leakage

Method used

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Embodiment Construction

[0031] The core of the present invention is to provide a direct-acting electric valve, which can ensure that the position of the valve core remains unchanged after the motor is powered off, so that the valve core is always in contact with the valve port, effectively avoiding valve port leakage.

[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] What needs to be explained here is that the upper and lower localizers involved in this article are based on Figure 1 to Figure 4 The components are located in the drawings and the positions of the components are defined only for the clarity and convenience of expressing the technical solution. It should be understood that the orientation words used herein shall not limit the scope of protection claimed in this application.

[0034...

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Abstract

The invention discloses a direct acting electric valve. The direct acting electric valve comprises a valve base having a valve cavity, a motor arranged at the upper end of the valve base, and a lead screw, wherein a rotor of the motor is relatively fixed with the axial position of the valve base; the upper end of the lead screw is fixedly connected with the rotor; the lead screw is connected with a nut in a thread fit manner; the nut is connected with a valve core; the valve core is driven by the nut to axially move to open or close a valve port formed in the valve base; a spring is arranged between the nut and the valve core; the valve core is located in a total closing state; the valve core is tightly sealed with the valve port under the effect of the spring; and the lower end of the nut is bonded with the valve core. Through the design, when the failure of the axial locking force transferred to the nut and the valve core by the motor through the lead screw due to the slippage of transmission threads of the lead screw and the nut caused by vibration or other factors is generated, the valve core can be tightly pressed on the valve port through the elastic force of the spring to prevent leakage.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to a direct-acting electric valve. Background technique [0002] For commercial air conditioners such as multi-split or modular units, one outdoor unit is connected to multiple indoor unit systems. A flow control valve needs to be installed on the refrigerant circuit of each indoor unit to cut off the refrigerant or adjust the flow. The requirement for this flow control valve is to be able to adjust the flow at any opening degree and to operate stably, and because it needs to be installed on the refrigerant circuit of each indoor unit, it is also necessary for the flow control valve to meet the requirements of miniaturization and large capacity. [0003] In order to achieve the above requirements, a direct-acting electric valve is proposed. The screw of the direct-acting electric valve is fixed to the motor rotor, and the axial position of the motor rotor and the va...

Claims

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Application Information

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IPC IPC(8): F16K1/00F16K1/32F16K31/04F16K31/50
CPCF16K1/00F16K1/32F16K31/04F16K31/50
Inventor 不公告发明人
Owner ZHEJIANG SANHUA CLIMATE & APPLIANCE CONTROLS GRP CO LTD
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