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A four-way valve

A four-way valve and valve body technology, applied in the field of four-way valves, can solve problems such as piston jamming, and achieve the effects of simplified assembly, reduced production costs, and simple structure

Active Publication Date: 2018-10-09
ZHEJIANG DUNAN MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object to be achieved by the present invention is to provide a four-way valve to solve the problem that the piston is stuck due to dry friction between the piston and the valve body

Method used

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  • A four-way valve
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  • A four-way valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 and 2 Shown is the first embodiment of the present invention, a four-way valve, including a main valve 1 and a pilot valve 2, the main valve includes a valve body 11 and a piston 12, the piston is located in the inner cavity of the valve body and can move along the valve body Axial movement, one end of the valve body is provided with a first end cover 13 for sealing, and the other end is provided with a second end cover 14 for sealing, the inner cavity between the piston and the first end cover communicates with the first connecting pipe 21 of the pilot valve, It is fixedly connected to the first end cover, and the inner cavity between the piston and the second end cover communicates with the second connecting pipe 22 of the pilot valve, and the second connecting pipe is fixedly connected to the second end cover. The valve body has four connecting holes 111, four Two pipe holes are evenly distributed along the circumference of the valve body, through t...

Embodiment 2

[0040] Such as Figure 7 and 8 Shown is the second embodiment of the present invention. This embodiment has been improved on the basis of Embodiment 1. The valve body 11 has eight nozzle holes, and the two nozzle holes form a group and are arranged axially along the valve body. The group of connecting pipe holes are evenly distributed along the circumference of the valve body, and the eight connecting pipe holes are respectively connected to the first condensing pipe C1, the second condensing pipe C2, the first evaporating pipe E1, the second evaporating pipe E2, the first high-pressure inlet pipe D1, and the second high-pressure inlet pipe. The air pipe D2, the first low-pressure exhaust pipe S1 and the second low-pressure exhaust pipe S2, wherein the first condensation pipe C1 and the second evaporation pipe E2 are arranged in the same set of nozzle holes and the first condensation pipe C1 is arranged near the second end In the connecting pipe hole of the cover 14, the seco...

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Abstract

The invention discloses a four-way valve which is an accessory for an air conditioning system, and solves the problem of locking of a piston due to dry friction between the piston and a valve body. The four-way valve comprises a main valve and a guide valve, the main valve comprises a valve body and a piston, and two ends of the valve body are provided with a first end cover seal and a second end cover seal respectively. Inner cavity walls at two ends of the valve body are provided with mounting steps axially extending from the ends of the valve body to the middle of the valve body, step surfaces of the two mounting steps are positioned on two sides of a pipe connection hole respectively, and each mounting step is provided with a lubrication bushing. The piston is matched with the inner wall of each lubrication bushing and slides along the inner wall of each lubrication bushing, the inner end face of each lubrication bushing is abutted against the step surface of the corresponding mounting step, and lengths of the lubrication bushings are larger than moving stroke of the piston. The four-way valve is used for changing flow direction of refrigerant in the air conditioning system to realize switching between refrigerating and heating.

Description

[0001] The patent application for this invention is a divisional application [0002] The filing date of the original application is: April 28, 2013 [0003] The application number is: 2013101575891 [0004] The name of the invention is: a four-way valve technical field [0005] The invention relates to a four-way valve for changing the flow direction of refrigerant in an air-conditioning system to realize switching between cooling and heating. Background technique [0006] In the prior art, a large-capacity four-way valve is usually used in heat pump air conditioners, and is mainly composed of a main valve and a pilot valve. Pipe, high-pressure intake pipe and low-pressure exhaust pipe, the two ends of the valve body are provided with a first end cover and a second end cover. The piston uses the pressure difference between the first end cover and the second end cover to move back and forth axially in the valve body, so as to switch back and forth between the high-pressur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/085
CPCF16K11/0853
Inventor 李维槽田鹏徐淦
Owner ZHEJIANG DUNAN MASCH CO LTD