JPS6243274U

JPS6243274U -

Info

Publication number: JPS6243274U
Application number: JP13388585U
Authority: JP
Priority date: 1985-08-31
Filing date: 1985-08-31
Publication date: 1987-03-16
Also published as: JPH0311667Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の電動膨張弁の一実施例を示
す中央縦断面図、第２図は上記電動膨張弁を使用
した冷媒回路の一例を示す回路図、第３図は冷媒
回路の変更例を示す回路図、第４図は冷媒回路の
他の変更例を示す回路図、第５図は従来例の説明
図である。１……弁本体、２……第１通路、３……第２通
路、４……第３通路、５……均圧路、６……第２
流路、７……均圧弁座、８……第２弁座、９……
第２弁体、１１……第１流路、１２……第１弁座
、１３……第１弁体、１７……電気的駆動機構、
２７……バネ。 Fig. 1 is a central vertical cross-sectional view showing one embodiment of the electric expansion valve of this invention, Fig. 2 is a circuit diagram showing an example of a refrigerant circuit using the above-mentioned electric expansion valve, and Fig. 3 is an example of a modification of the refrigerant circuit. 4 is a circuit diagram showing another modification of the refrigerant circuit, and FIG. 5 is an explanatory diagram of a conventional example. 1...Valve body, 2...First passage, 3...Second passage, 4...Third passage, 5...Pressure equalization passage, 6...Second passage
Flow path, 7... pressure equalization valve seat, 8... second valve seat, 9...
Second valve body, 11...first flow path, 12...first valve seat, 13...first valve body, 17...electric drive mechanism,
27...Spring.

Claims

[Scope of utility model registration request]

During the heating operation of the heat exchanger on the user side, the first passage 2 serves as an inlet for the high-pressure liquid refrigerant, and the second passage serves as an outlet for the refrigerant.
A passage 3 and a third passage 4 serving as an inlet for high-pressure liquid refrigerant or high-pressure gas refrigerant are respectively bored in the valve body, and the first passage 2 and second passage 3 are communicated via a pressure equalization passage 5. In addition, the third passage 4 and the second passage 3
A second valve seat 8 having approximately the same diameter as the opening on the first passage 2 side of the pressure equalizing passage 5 is provided in the second passage 6. On the other hand, a second valve body 9 is slidably disposed within the valve body 1, and the second valve body 9 contacts and separates from the second valve seat 8 to open the second flow path 6. A valve portion 9b that opens and closes, and a pressure equalizing portion 9a that closes the pressure equalizing path 5 when the valve portion 9b is in contact with the second valve seat 8 are provided, and the second valve body 9 is A biasing means 27 biases the valve in the valve closing direction, and a first passage 11 is provided in the second valve body 9 for communicating the first passage 2 and the second passage 3. A first valve seat 12 is formed in the valve body 1, and a first valve body 13 that contacts and separates from the first valve seat 12 to open and close the first flow path 11 is disposed inside the valve body 1. The first valve body 1 is arranged to be slidable in substantially the same direction as the valve body 9.
An electric drive mechanism 17 for driving 3 is provided,
Furthermore, engagement means 28 and 29 are provided between the first valve body 13 and the second valve body 9, and after the first valve seat 12 is opened by the movement of the first valve body 13, the first valve seat 12 is further opened in the valve opening direction. An electric expansion valve characterized in that when the first valve body 13 is moved, the second valve body 9 is moved in the valve opening direction via the engaging means 28 and 29.