Pilot type control valve

Abstract

The guide type control valve of the invention comprises a main valve (5) and an electric pilot valve (7), wherein the main valve comprises the following components: a valve body (10) which is formed with a valve chamber (13) for leading in and leading out the fluid; and a main valve core (20) which is sliding-freely inserted in the valve body (10) and does opening or closing to the main valve opening (14) arranged on the valve body (10) and comprises a large diameter part (20A) and a minor diameter part (20B) and the cross section of which is shaped like a reverse Chinese character tu, and the electric pilot valve comprises the following components: a separating component (32) which is installed that the component closes the top opening of the valve body (10) and a backpressure chamber (33) is separated between the separating component and the main valve core (20); and a pilot valve core (35) which does opening and closing to the pilot valve opening (27) arranged on the main valve core (20), the electric pilot valve is arranged with a voltage equalizing channel (24) which communicates the valve chamber (13) with the backpressure chamber (33), and exerts the force facing to the valve-opening direction to the main valve core (20) with the compressed spiral spring (25), besides the main valve core (20) is caused to move to the valve-opening direction following the moving of the pilot valve core (35) to the valve-opening direction. Otherwise, the outer diameter Da of the large diameter part (20A) of the main valve core (20) is 1.5 to 3 times of the diameter Db of the main valve opening (14). The present invention can provide a guide type control valve which can optionally and subtly regulate the opening degree of the valve and can effectively avoid the generating of the noise, and can get an excellent response property and action stability as well as control property , etc.

Description

technical field [0001] The present invention relates to a control valve suitable for a refrigerating cycle of an air conditioner and the like, and particularly relates to a pilot type control valve capable of arbitrarily and finely adjusting the valve opening (opening area). Background technique [0002] For example, in a multi-type air conditioner having a plurality of indoor units for one outdoor unit, as a control valve that can be appropriately installed between the outdoor unit and the indoor unit, those described in the following Patent Document 1 and the like are known as precursors. The valve uses a solenoid valve pilot control valve. [0003] The above-mentioned pilot control valve generally has a main valve and an electromagnetic pilot valve. The main valve has a valve body formed with a valve chamber for introducing and discharging refrigerant, is slidably inserted into the valve body, and can be connected to the valve body provided on the valve body. The upper m...

AI Technical Summary

Problems solved by technology

That is, in fact, only two positions of the fully closed state and the fully open state can be obtained, and it is impossible to finely adjust the valve opening (opening area)

In addition, only the opening area of ​​the pilot valve is opened before opening the main valve, so the opening area of ​​the valve as a whole is small, it takes time to equalize the pressure, and the response is not very good

In addition, when the main valve is opened, the opening area suddenly increases, and the flow rate changes rapidly, resulting in deafening noise

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