JP-7855146-B2 - Switching valves and air conditioning systems

Inventors

• 朱 佳峰
• 何 勇
• 孫 俊杰

Assignees

• 浙江盾安人工環境股▲ふん▼有限公司

Dates

Publication Date

20260507

Application Date

20240126

Priority Date

20230201

Claims (10)

1. A main valve comprising a valve body, a first connecting pipe, a second connecting pipe, and a third connecting pipe, wherein the first, second, and third connecting pipes are arranged side by side on one side of the valve body and are all connected to the valve body, and the second connecting pipe is located between the first and third connecting pipes, and an exhaust hole is further drilled in the side wall of the valve body, A pilot valve connected to the main valve, A pipe fitting connected to the exhaust port, A first capillary tube is located between the main valve and the pilot valve, with one end connected to the end of the pilot valve and a portion of the other end extending into the pipe fitting and connected to the pipe fitting, A switching valve that satisfies B ≤ 0.5A, where A is defined as the furthest distance between the outer surface of the first connecting pipe and the outer surface of the third connecting pipe along the axial direction of the valve body, and B is defined as the shortest distance between the central axis of the second connecting pipe and the central axis of the exhaust port.
2. The switching valve according to claim 1, wherein the central axis of the exhaust port is perpendicular to the plane on which the first connecting pipe, the second connecting pipe, and the third connecting pipe are located.
3. The first capillary tube is L-shaped, as described in claim 2.
4. The switching valve according to claim 1, wherein the pipe fitting and the first capillary tube are made of the same material, and the pipe fitting and the valve body are made of different materials.
5. The switching valve according to claim 4, wherein the valve body is made of stainless steel, and the pipe fitting and the first capillary tube are made of copper.
6. The switching valve according to claim 1, wherein the valve body has a valve chamber, a flange extending away from the valve chamber is provided around the exhaust port, and a portion of the pipe fitting enters the flange and is connected to the flange.
7. The switching valve according to claim 6, wherein L is the shortest distance from the end face of the pipe fitting adjacent to the valve chamber to the inner wall of the valve body, and H is the height of the flange, such that 0 ≤ L ≤ H.
8. The valve chamber includes a first chamber, a second chamber, and a third chamber, and the switching valve is A second capillary tube is located between the pilot valve and the valve body, with one end connected to the pilot valve and the other end communicating with the first chamber, The present invention further includes a third capillary tube located between the pilot valve and the valve body, one end of which is connected to the pilot valve and the other end of which is connected to the third chamber, The switching valve according to claim 6, wherein the first capillary and the second chamber are in communication.
9. The main valve is, The switching valve according to claim 8, further comprising the first connecting pipe, the second connecting pipe, and the third connecting pipe, and a fourth connecting pipe provided opposite to both sides of the valve body and communicating with the second chamber.
10. An air conditioning system comprising a switching valve according to any one of claims 1 to 9.

Description

(Related applications) This application claims priority to the Chinese patent application filed on 1 February 2023, application number 202320186196.2, titled "Switching Valve and Air Conditioning System," which is incorporated herein by reference in its entirety. This application relates to the field of air conditioning technology, and more particularly to switching valves and air conditioning systems. In air conditioning systems, switching valves are primarily used to control the opening or closing of pipelines, thereby enabling fluids to flow while changing direction. The switching valve includes a main valve with an inlet D connecting pipe through which high-pressure fluid flows, and a pilot valve. The switching valve further includes inlet capillaries connected to the end of the pilot valve and around the inlet D connecting pipe, respectively, allowing a portion of the high-pressure fluid to flow into the pilot valve. However, this connection method results in a long inlet capillary tube, requiring multiple bends to achieve the connection, making the process complex and costly. According to various embodiments of this application, a switching valve and air conditioning system that can reduce costs are provided. The switching valve includes a valve body, a first connecting pipe, a second connecting pipe, and a third connecting pipe, the first, second, and third connecting pipes being arranged side by side on one side of the valve body and all connected to the valve body, with the second connecting pipe located between the first and third connecting pipes, and an exhaust port further drilled in the side wall of the valve body; a pilot valve connected to the main valve; a pipe fitting connected to the exhaust port; and a first capillary tube located between the main valve and the pilot valve, with one end connected to the end of the pilot valve and a portion of the other end extending into the pipe fitting and connected to the pipe fitting. If we define the furthest distance between the outer surface of the first connecting pipe and the outer surface of the third connecting pipe along the axial direction of the valve body as A, and the shortest distance between the central axis of the second connecting pipe and the central axis of the exhaust port as B, then B ≤ 0.5A is satisfied. In one embodiment, the central axis of the exhaust port is perpendicular to the plane on which the first connecting pipe, the second connecting pipe, and the third connecting pipe are located. In one embodiment, the first capillary is L-shaped. In one embodiment, the pipe fitting and the first capillary tube are made of the same material, while the pipe fitting and the valve body are made of different materials. In one embodiment, the valve body is made of stainless steel, and the pipe fitting and the first capillary tube are made of copper. In one embodiment, the valve body has a valve chamber, and a flange is provided around the exhaust port, extending away from the valve chamber. A portion of the pipe fitting enters the flange and is connected to it. In one embodiment, if L is the shortest distance from the end face of the pipe fitting adjacent to the valve chamber to the inner wall of the valve body, and H is the height of the flange, then the condition 0 ≤ L ≤ H is satisfied. In one embodiment, the valve chamber includes a first chamber, a second chamber, and a third chamber. The switching valve further includes a second capillary located between the pilot valve and the valve body, with one end connected to the pilot valve and the other end communicating with the first chamber, and a third capillary located between the pilot valve and the valve body, with one end connected to the pilot valve and the other end communicating with the third chamber, wherein the first capillary and the second chamber are in communication. In one embodiment, the main valve further includes a first connecting pipe, a second connecting pipe, and a third connecting pipe, as well as a fourth connecting pipe provided opposite to both sides of the valve body and communicating with the second chamber. This application further provides an air conditioning system including the above-described switching valve. Details of one or more embodiments of this application are described in the following drawings and description. Other features, purposes, and advantages of this application will become apparent from the specification, drawings, and claims. To better describe and illustrate the embodiments and/or examples of the inventions disclosed herein, one or more drawings may be referenced. Any additional details or examples used to illustrate the drawings should not be considered to limit the scope of any of the disclosed inventions, the embodiments and/or examples described herein, or the best modes of these inventions as understood herein. This is a schematic diagram of the structure of the switching valve provided in this application.This is a front view of