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Electromagnetic valve

A solenoid valve and a new type of technology, applied in the field of solenoid valves, can solve the problems of surface quality damage, low pass rate, and high process scrapping rate, and achieve the effects of simple structure, improved product pass rate, and guaranteed pass rate.

Inactive Publication Date: 2009-01-07
ZHEJIANG SANHUA CLIMATE & APPLIANCE CONTROLS GRP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] Since the sleeve of the original scheme is a semi-closed structure in the shape of a pen sleeve, the surface of the small valve seat 2.9.1 can only be processed first and then welded, that is, it will not be processed after welding. Due to the influence of welding heat, its surface quality will be affected. A certain degree of damage, so that the pass rate after mass production is low, and the process scrap rate is high

Method used

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] Such as figure 2 As shown, the solenoid valve with figure 1 Compared with the structure shown, it is also composed of the main valve 3, the pilot valve 2 and the electromagnetic coil 1. Except for the differences mentioned below, the other structures and working principles of the detailed structure are not substantially different from those of the prior art, and will not be repeated here. .

[0036] figure 2 Solenoid valve shown with figure 1 The structures shown differ in the structure of their pilot valves:

[0037] The end of the sleeve 2.8 of the pilot valve adjacent to the small valve seat (the left end in the figure) is blocked by an end cover 2.10. Usually, the end cover 2.10 is sealed on the sleeve 2.8 adjacent to the small valve seat 2.9 in the form of welding. One end; in order to facilitate welding and ensure a good sealing effect, th...

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Abstract

The present invention relates to a novel electromagnetic valve with a pilot valve structure, which belongs to a system control element in a refrigeration-circulating system. The prior art has the defect that the structural problem causes the injury of the surface quality of a small valve seat, which reduces the qualified rate of products. The electromagnetic valve comprises a main valve, a pilot valve and an electromagnetic coil; wherein, the pilot valve is provided with a bushing; a small valve seat is welded in the cavity of the bushing; the end of the bushing, which is close to the electromagnetic coil, is hermetically welded with an end enclosure, and the other end of the bushing is blocked by an end cover. Since the end of the bushing, which is close to the small valve seat, is blocked by the end cover, both ends of the bushing are open, particularly, the end of the bushing, which is close to the small valve seat, is open, thereby, after being welded, the small valve seat can be precisely processed in order to avoid the injury of the surface quality of the small valve seat caused by welding, ensure the precision degree of the surface of the small valve seat and increase the qualified rate of products. Meanwhile, since the structure is simple, the qualified rate of mass production can be ensured.

Description

technical field [0001] The invention relates to a solenoid valve with a pilot valve used in a refrigerating cycle system, such as a reversing solenoid valve used in a heat pump air conditioner. , The function of heating in winter, and it can also be used for defrosting of heat pump air conditioning system. Background technique [0002] The structural principle of the original solenoid valve scheme is as follows: figure 1 As shown, it is composed of electromagnetic coil 1, pilot valve 2 and main valve 3. Its structure and working principle are described as follows: [0003] The main valve consists of a cylindrical valve body 3.1, on which there is an exhaust pipe D (that is, a high-pressure area) connected to the compressor exhaust port, and a suction pipe S (that is, a high-pressure area) connected to the compressor suction port. It is a low-pressure area), the connecting pipe E connected with the indoor heat exchanger, the connecting pipe C connected with the outdoor hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/065F16K27/00
Inventor 黄松炎郭晖
Owner ZHEJIANG SANHUA CLIMATE & APPLIANCE CONTROLS GRP CO LTD
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