JPH0687792U - Control valve with strainer - Google Patents

Abstract

(57) [Summary] [Objective] The present invention reduces the man-hours required for constructing a circuit by pre-assembling the strainer assembly in the inlet pipe and the outlet pipe integrated with the control valve, and reduces the total component cost. The purpose is to do. A control valve with a strainer according to the present invention has a ring-shaped outer peripheral portion inside an inlet pipe 2 and an outlet pipe 3 which are integrally connected to a control valve for controlling a flow rate of a fluid according to a valve opening degree. A strainer assembly 4 in which a mesh cap-shaped strainer 7 is fixed to one end of a holder 5 having a groove 6.
Is inserted, and the ring-shaped groove 6 of the strainer assembly 4 is inserted.
It is characterized in that the strainer assembly 4 is closely fixed in the pipe by caulking the outer peripheral portion of the pipe where is located.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control valve with a strainer for controlling a fluid in a refrigerant circuit such as air, oil and air conditioning.

[0002]

[Prior art]

 Fig. 4 is a refrigerant circuit diagram of a conventional air conditioner and the like. Fig. 4 shows a conventional component configuration along the flow of the refrigerant based on this circuit diagram. The compressor 8 → four-way valve 9 → indoor heat exchanger 10 → strainer assembly Each part was arranged in the order of 11 → control valve 12 → strainer assembly 11 → outdoor heat exchanger 13 → four-way valve 9 → compressor 8, and the outlet side and inlet side pipe of each part were joined by brazing or the like. In the conventional strainer assembly 11, as shown in FIG. 6, a mesh cap-shaped strainer 14 fixed to one side of a ring plate 15 is press-fitted into a pipe 16 and front and rear sides 17, 18 of the strainer assembly 11 are inserted. The pipe was reduced in diameter by drawing and brazed to the front and rear pipes in the refrigerant circuit and fixed. The role of the strainer assembly 11 is to prevent foreign matter in the circuit from entering the control valve 12 and to keep the operation of the control valve normal.

[0003]

[Problems to be solved by the device]

 Since the conventional strainer assembly is arranged as one component in the circuit as described above, it is necessary to connect it to the pipes in the refrigerant circuit before and after it with brazing or the like. Since the drawing process had to be performed before and after No. 14, there was a problem that the number of processing steps was large and the cost for forming the circuit was high. In order to solve the above problems, the present invention reduces the processing man-hours when constructing a circuit by pre-installing the strainer assembly in the inlet pipe and the outlet pipe that are integrated with the control valve, thereby reducing the total parts. It tries to reduce the cost.

[0004]

A control valve with a strainer according to the present invention is provided in an inlet pipe 2 and an outlet pipe 3 that are integrally connected to a control valve that controls a flow rate of a fluid according to a valve opening degree. The strainer assembly 4 formed by fixing the mesh cap-shaped strainer 7 to one end of the holder 5 having the ring-shaped groove 6 on the outer peripheral portion is inserted, and the outer periphery of the pipe in which the ring-shaped groove 6 of the strainer assembly 4 is located. The strainer assembly 4 is characterized in that the strainer assembly 4 is tightly fixed in the pipe by caulking the portion toward the center.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The control valve with a strainer of the present invention has a strainer assembly 4 previously incorporated in an inlet pipe and an outlet pipe integrated with the control valve, and the strainer assembly 4 has a hole 19 inside and an outside. It consists of a holder 5 having a ring-shaped groove 6 and a mesh-shaped strainer 7 formed in a bulk shape. The mesh strainer 7 is fixed to the holder 5 by caulking or soldering. Further, the strainer assembly 4 is inserted into the inlet pipe 2 and the outlet pipe 3 of the control valve 12 for adjusting the fluid, and the outer peripheral portion of the pipe in which the ring-shaped groove of the strainer assembly 4 is located is covered by a roller from the outside. By squeezing or deforming the groove 6 with rubber or the like so that the ring-shaped groove 6 of the holder 5 and the inner surfaces of the inlet pipe 2 and the outlet pipe 3 come into close contact with each other, the inlet pipe 2 and the outlet pipe 3 of the control valve. And the strainer assembly 4 is integrated. Therefore, the fluid passes through the inner hole 19 of the holder 5 of the strainer assembly 4 and collects foreign matter in the circuit by the strainer 7, so that only the fluid free of foreign matter is sent into the control valve 12.

[0006]

[Effect of device]

 As described above, according to the present invention, as shown in FIG. 3, the refrigerant circuit includes the compressor 8 → four-way valve 9 → indoor heat exchanger 10 → strainer-equipped control valve 1 → outdoor heat exchanger 13 → four-way valve 9 → compressor 8 The strainer assembly 11 (for two pieces) of the related art and the cost of brazing the strainer assembly 11 are unnecessary. Also, only one caulking is required to fix the strainer. Therefore, the cost of the entire circuit is reduced.

[0007]

[Brief description of drawings]

FIG. 1 is a refrigerant control valve of the present invention.

FIG. 2 is a strainer assembly of the present invention.

FIG. 3 is a refrigerant circuit diagram of the present invention.

FIG. 4 is a conventional refrigerant circuit.

FIG. 5 is a conventional refrigerant control valve.

FIG. 6 A conventional strainer assembly.

[Explanation of symbols]

1 control valve with strainer, 2 inlet pipe,
3 outlet pipes, 4 strainer assy, 5
Holder, 6 ring-shaped groove, 7 strainer, 8 compressor, 9 four-way valve,
10 indoor heat exchanger, 11 strainer assembly, 12 control valve, 13 outdoor heat exchanger, 14 strainer, 16 pipe, 15 plate, 17 inlet side,
18 exit side, 19 holes.

Claims (1)

[Scope of utility model registration request] 1. A holder 5 having a ring-shaped groove 6 in the outer peripheral portion in an inlet pipe 2 and an outlet pipe 3 which are integrally connected to a control valve for controlling the flow rate of fluid according to the valve opening.
The strainer assembly 4 formed by fixing the mesh cap-shaped strainer 7 to one end of the strainer assembly 4 is inserted, and the outer peripheral portion of the pipe in which the ring-shaped groove 6 of the strainer assembly 4 is located is caulked in the center direction, thereby straining the strainer assembly 4
A control valve with a strainer characterized in that the valve is closely fixed in the pipe.