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Four way switching valve

A technology for switching valves and pistons, applied in valve devices, multi-way valves, mechanical equipment, etc., can solve problems such as difficult insertion, and achieve the effect of improving strength

Active Publication Date: 2016-04-27
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, it is difficult to insert the assembly unit obtained by connecting the first and second pistons 111, 112 and the connecting plate 113 into the cylindrical portion while avoiding, for example, a valve seat in the cylindrical portion.
[0012] That is, the other conventional four-way switching valve described above has a problem that it is difficult to insert the first and second pistons 111, 112 and the connecting plate 113 into the main body of the four-way switching valve.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0096] figure 1 It is a schematic cross-sectional view of the four-way switching valve of the first embodiment of the present invention provided in an air conditioner.

[0097] The four-way switching valve has a four-way switching valve main body 1, a valve seat 2 provided in the four-way switching valve main body 1, and a valve core 3 provided in the four-way switching valve main body 1.

[0098] The four-way switching valve body 1 has: a cylindrical portion 1a; a first blocking portion 1b that blocks one end of the cylindrical portion 1a in the axial direction; and a second blocking portion 1c that turns a cylindrical shape The other end of the portion 1a in the axial direction is blocked. The first blocking portion 1b and the second blocking portion 1c are welded to the cylindrical portion 1a. In addition, the cylindrical part 1a is an example of a cylindrical part.

[0099] A first port 11 is provided on the upper side (one end side in the direction perpendicular to the axial ...

no. 2 Embodiment approach

[0133] Figure 4 It is a schematic exploded perspective view of the first piston 221 and the second piston 22 and the connecting portion 223 included in the four-way switching valve according to the second embodiment of the present invention. In addition, in Figure 4 Here, the same components as those of the first embodiment described above are assigned the same reference numerals as those of the components of the first embodiment described above. In addition, in the following description, the same components as those of the first embodiment described above are denoted with the same reference numerals as those of the components of the first embodiment described above.

[0134] The four-way switching valve has: a first piston 221 arranged in the cylindrical portion 1a of the four-way switching valve body 1 and opposed to the second piston 22 in the axial direction; and a connecting portion 223 for connecting The first piston 221 and the second piston 22 are different from the fir...

no. 3 Embodiment approach

[0149] Figure 5 It is a schematic exploded perspective view of the first piston 321 and the second piston 322 and the first connection portion 323 and the second connection portion 324 included in the four-way switching valve according to the third embodiment of the present invention. In addition, in the following description, the same components as those of the first embodiment described above are denoted by the same reference numerals as the components of the first embodiment described above.

[0150] The four-way switching valve has: a first piston 321 arranged in the cylindrical portion 1a of the four-way switching valve body 1, and a second piston 322 arranged in the cylindrical portion 1a of the four-way switching valve body 1. Inside, it opposes the first piston 321 in the axial direction; and the first connecting portion 323 and the second connecting portion 324, which are used to connect the first piston 321 and the second piston 322, are different from the above-mention...

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Abstract

The present invention provides a four-way switching valve capable of preventing reduction of sealing performances of at least one of a first piston and a second piston and allowing the first piston, the second piston and a conncetion portion to be easily inserted into a cylindrical portion. The four way valve is provided with a connection protion connecting between the first piston (21) and the second piston (22). The connecting portion (23) is formed by the second piston with respect to (22) axially relative movement, and the second piston (22) locked. Thus, without the use of such as screws, the connecting portion (23) can be fixed to the second piston (22).

Description

Technical field [0001] The present invention relates to a four-way switching valve used in, for example, air conditioners. Background technique [0002] In the past, the four-way switching valve was like Figure 7 A four-way switching valve with piston 101 is shown. The piston 101 has a structure in which a first reinforcement plate 102 and a second reinforcement plate 103 sandwich the piston seal 104. The plate spring 108 is interposed between the piston seal 104 and the first reinforcement plate 102. In addition, the first reinforcement plate 102 and the second reinforcement plate 103 are pressed toward the piston seal 104 by the rivet 107. [0003] In addition, the piston 101 is fixed to one end of the connecting rod 105 with a screw 106. Therefore, the screw 106 penetrates the first reinforcement plate 102 and the second reinforcement plate 103, the piston seal 104, and the plate spring 108. As a result, the sealing performance of the piston 101 decreases. [0004] A four-way...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/00
CPCF16K11/00
Inventor 大沼洋一竹本圭吾原口优
Owner DAIKIN IND LTD
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