JP6111082B2 - Solenoid valve with differential pressure valve - Google Patents

Description

  The present invention relates to a solenoid valve with a differential pressure valve used in a heat pump system.

A known heat pump system to which a solenoid valve with a differential pressure valve is applied is shown in FIG.
The electromagnetic valve with differential pressure valve 10 is a three-way valve, and includes a valve inlet 11, an electromagnetic valve outlet 12, and a differential pressure valve outlet 13.
For example, at the time of heating operation, the high-temperature refrigerant compressed by the electrically driven compressor 1 is sent to the indoor heat exchanger 3 functioning as a condenser via the pipe 2 to perform indoor heating. The refrigerant that has exited the indoor heat exchanger is sent to the outdoor heat exchanger 7 through the pipe 4 and the heating pipe 5 and the heating throttle 6 through the pipe 4, to the electromagnetic valve 10 with a differential pressure valve, and to the electromagnetic valve outlet 12 Is sent to the accumulator 15 through the pipe 14. In the accumulator 15, the gas-phase refrigerant is returned to the compressor 1 through the pipe 16.

During the cooling operation, the flow of the refrigerant to the pipe 4 is the same as that during the heating, and then passes through the solenoid valve 9 from the pipe 8 and enters the outdoor heat exchanger 7 and is sent to the solenoid valve 10 with the differential pressure valve. It is sent out from the outlet 13 to the pipe 20. Then, the pressure is reduced by the cooling diaphragm 21 and evaporated by the evaporator 22 to generate cold air. The temperature-controlled air is sent out indoors by the fan 24.
This type of solenoid valve with a differential pressure valve is disclosed in the following patent document.

Japanese Patent No. 4283069

As the power of automobiles develops from an internal combustion engine to a hybrid and further to an electric motor, the compressor of the air conditioner is also driven by a motor, and quietness is progressing.
Accordingly, an object of the present invention is to improve the vibration isolation of the electromagnetic valve with a differential pressure valve and reduce noise generation.

  In order to solve the above-described problems, the solenoid valve with a differential pressure valve according to the present invention includes an inlet through which refrigerant from the heat exchanger flows into the valve body, a first outlet through which refrigerant flows out to the accumulator, and refrigerant flows out through the throttle. A second valve outlet, an upper valve chamber having a main valve seat communicating with the inlet, a lower valve chamber communicating from the upper valve chamber to the first outlet, and an electromagnetic valve disposed in the upper valve chamber. A pilot-type main valve body that opens and closes the main valve seat by a valve portion, and operates by a differential pressure between the inlet side pressure and the first outlet side pressure when the main valve body is closed, and the refrigerant is supplied to the throttle And a differential pressure valve portion to be directly introduced.

And the said differential pressure | voltage valve part is provided in the position facing the said 1st outflow port in the side part of the said lower valve chamber, A differential pressure | voltage valve seat and the differential pressure | voltage valve body arrange | positioned facing this differential pressure | voltage valve seat A differential pressure valve frame disposed in the first outlet, a coil spring disposed in the differential pressure valve frame and biasing the differential pressure valve body toward the differential pressure valve seat, and the differential pressure valve body An anti-vibration spring for preventing vibration, and the anti-vibration spring is provided on the differential pressure valve body, and a protruding protrusion protruding outward is formed at the tip and slides on the inner peripheral surface of the differential pressure valve frame. A plurality of elastic legs that are elastically contacted freely .

On SL plurality of resilient legs configured to extend in the axial direction of the differential pressure valve frame inner surface, or has a configuration extending in the circumferential direction of the differential pressure valve frame inner surface.

  The electromagnetic valve with a differential pressure valve of the present invention having the above configuration improves the vibration isolation performance of the differential pressure valve and reduces noise generation.

Sectional view of solenoid valve with differential pressure valve of the present invention The expanded sectional view of the differential pressure valve part of the solenoid valve with a differential pressure valve of the present invention Perspective view of vibration-proof spring of solenoid valve with differential pressure valve Expanded sectional view showing another example of the differential pressure valve portion of the solenoid valve with a differential pressure valve Expanded sectional view showing another example of the differential pressure valve portion of the solenoid valve with a differential pressure valve Expanded sectional view showing another example of the differential pressure valve portion of the solenoid valve with a differential pressure valve Perspective view of vibration-proof spring of solenoid valve with differential pressure valve The perspective view which shows the other example of the vibration-proof spring of a solenoid valve with a differential pressure valve Explanatory drawing of heat pump system of solenoid valve with differential pressure valve

As shown in FIG. 1, the electromagnetic valve 100 with a differential pressure valve comprises a single valve main body 102 with an electromagnetic valve part 200 and a differential pressure valve part 300 to form a three-way valve.
The valve body 102 has a refrigerant inlet 110 and communicates with the upper valve chamber 112. A main valve seat 114 is provided in the upper valve chamber 112, and the refrigerant passing through the main valve seat 114 is sent out from the passage 116 and the first outlet 120.

  The refrigerant in the upper valve chamber 112 is sent to the differential pressure valve unit 300 side through the branch passage 118. The differential pressure valve unit 300 has a lower valve chamber 310 that faces the first outlet 120 and is provided with a differential pressure valve seat 312. The refrigerant in the branch passage 118 is sent out from the second outlet 130 through the differential pressure valve seat 312.

The differential pressure valve unit 300 includes a differential pressure valve body 330, and the seal member 332 opens and closes the differential pressure valve seat 312.
A coil spring 370 disposed in the differential pressure valve frame 320 normally biases the differential pressure valve body 330 in the valve closing direction.
When the pressure difference between the refrigerant in the lower valve chamber 310 and the first outlet 120 becomes a predetermined value or more, the differential pressure valve unit 300 is opened, and the refrigerant flows out from the second outlet 130.

  The electromagnetic valve unit 200 has a suction element 260 fixed to the opening of the upper valve chamber 112 of the valve body 102, and the main valve body 210 is disposed in the suction element 260. The main valve body 210 has a seal member 212 facing the main valve seat 114. A pilot hole 214 is formed at the center of the main valve body 210, and a pressure equalizing hole 216 is provided in parallel to the pilot hole 214. A pilot valve seat 218 is provided at the top of the pilot hole 214, and a seal member 272 at the tip of the plunger 270 opens and closes the pilot valve seat 218.

The main valve body 210 is urged by a coil spring 230 in a direction (opening direction) in which the seal member 212 is separated from the main valve seat 114.
The upper portion of the suction element 260 is inserted into the pipe 250. A plunger 270 is slidably inserted into the central portion of the suction element 260.

An electromagnetic coil 240 is attached to the outside of the pipe 250.
When the electromagnetic coil 240 is energized, a magnetic force is generated in the attractor 260 and the plunger 270 inside the pipe 250, the plunger 270 is lowered against the coil spring 280, and the main valve body 210 is pushed down against the coil spring 230. Thus, the seal member 212 closes the main valve seat 114.

  When the energization of the electromagnetic coil 240 is cut off, the plunger 270 is raised by the force of the coil spring 280 and the tip seal member 272 is also raised, so that the pilot valve seat 218 is opened. Through the pressure equalizing hole 216, the pressure acting on the pressure receiving surface at the top of the main valve body 210 is discharged to the passage 116 side through the pilot hole 214. As a result, the pressure acting on the pressure receiving surface above the main valve body 210 is smaller than the pressure acting on the pressure receiving surface below the main valve body 210, and the upper pressure receiving surface and the lower pressure receiving surface of the main valve body 210 are reduced. The main valve element 210 is opened by the differential pressure and the coil spring 290.

  In the electromagnetic valve 100 with a differential pressure valve in FIG. 1 described above, the electromagnetic valve unit 200 is configured as a normally open type electromagnetic valve (“open” in a non-energized state), but a normally closed type solenoid valve (in a non-energized state). Naturally, “closed”) is also possible.

  As shown in FIG. 2, the differential pressure valve body 330 has a seal member 332 in contact with the differential pressure valve seat 312 on the front surface, and a stopper 340 is fixed to the rear surface via a caulking portion 334. A diaphragm 350 is sandwiched between the differential pressure valve body 330 and the stopper 340, and an outer peripheral portion of the diaphragm 350 is fixed to the valve body 102 side through a pressing member 360.

  A coil spring 370 is disposed in the differential pressure valve frame 320 and biases the differential pressure valve body 330 toward the valve closing side via a stopper 340. An anti-vibration spring 400 is provided between the coil spring 370 and the stopper 340. The anti-vibration spring 400 has an elastic leg 420, and the elastic leg 420 is slidably elastically contacted with the inner peripheral surface of the differential pressure valve frame 320.

  Since the differential pressure valve unit 300 includes the vibration-proof spring 400, vibration generated in the differential pressure valve body 330 can be prevented. By this action, noise generated when the refrigerant passes through the differential pressure valve unit 300 can be reduced.

  As shown in FIG. 3, the anti-vibration spring 400 is provided with four elastic leg portions 420 by bending the outside of the ring portion 410 having the hollow portion 405. A convex portion 430 is formed at the tip of the elastic leg portion 420 by pressing. The elastic leg portion 420 slides in contact with the inner peripheral surface of the differential pressure valve frame 320. The elastic leg portion 420 extends in the axial direction of the inner peripheral surface of the differential pressure valve frame 320.

FIG. 4 shows another example of the differential pressure valve unit 300.
In the differential pressure valve portion 300, the stopper 340 shown in FIG. 2 is omitted, and the anti-vibration spring 400 is directly attached to the surface of the diaphragm 350.
The structure of the anti-vibration spring 400 is the same as that shown in FIG.

FIG. 5 shows still another example of the differential pressure valve unit 300.
In the differential pressure valve unit 300, the diaphragm 350 shown in FIG. 4 is omitted, and the vibration isolation spring 400 is directly brought into contact with the differential pressure valve body 330 and pressed by the coil spring 370.
Sealing is achieved by fitting a sealing 336 around the outer periphery of the differential pressure valve body 330. The structure of the anti-vibration spring 400 is the same as that shown in FIG.

FIG. 6 shows still another example of the differential pressure valve unit 300.
In this differential pressure valve portion 300, the structure of the vibration isolation spring 500 is different from that of the vibration isolation spring 400 described above. Since other configurations are the same as those of the differential pressure valve unit 300 described above, the same members are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 7, the anti-vibration spring 500 is provided with four elastic leg portions 520 by bending the outside of the ring portion 510 having the hollow portion 505. A convex part 530 is formed at the tip of the elastic leg part 520 by pressing.
The elastic leg portion 520 slides in contact with the inner peripheral surface of the differential pressure valve frame 320. The elastic leg portion 520 extends in the circumferential direction of the inner peripheral surface of the differential pressure valve frame 320.
The anti-vibration spring 500 can have a shorter length in the axial direction than the anti-vibration spring 400 shown in FIG.

FIG. 8 shows still another example of the differential pressure valve unit 300 of the present invention.
As described with reference to FIG. 6, the differential pressure valve unit 300 has a structure in which the vibration-proof spring 500 is brought into direct contact with the differential pressure valve body 330 using the coil spring 370.
With this configuration, the overall length of the differential pressure valve unit 300 can be shortened.

  ADVANTAGE OF THE INVENTION According to this invention, it is in the solenoid valve with a differential pressure valve with which a heat pump system is equipped, It can prevent the vibration generation | occurrence | production of the differential pressure | voltage valve part which a refrigerant | coolant passes during a cooling cycle, and has the effect which aims at reduction of a noise. .

100 Solenoid valve with differential pressure valve 102 Valve body 110 Inlet 112 Upper valve chamber 114 Main valve seat 118 Branch passage 200 Electromagnetic valve part 210 Main valve body 212 Seal member 216 Pressure equalizing hole 218 Pilot valve seat 230 Coil spring 240 Electromagnetic coil 250 Pipe 260 Suction element 300 Differential pressure valve part 320 Differential pressure valve frame 332 Seal member 340 Stopper 350 Diaphragm 370 Coil spring 400, 500 Anti-vibration spring 420, 520 Elastic leg part 405, 505 Hollow part 410, 510 Ring part 430, 530 Protrusion part

Claims (3)

An electromagnetic valve portion and a differential pressure valve portion are integrally provided in one valve body, and an inlet through which refrigerant from a heat exchanger flows into the valve body, and a first outlet through which the refrigerant flows out to an accumulator A second outlet from which the refrigerant flows out to the throttle, an upper valve chamber that communicates with the inlet and includes a main valve seat, a lower valve chamber that communicates from the upper valve chamber to the first outlet, A pilot-type main valve body that is arranged in the upper valve chamber and opens and closes the main valve seat by the electromagnetic valve section, and operates by the differential pressure between the compressor side pressure and the condenser side pressure when the main valve body is closed. and a differential pressure valve unit for introducing directly the refrigerant to the evaporator,
The differential pressure valve portion is provided at a position facing the first outlet in the side surface portion of the lower valve chamber, a differential pressure valve seat, and a differential pressure valve body disposed to face the differential pressure valve seat; A differential pressure valve frame disposed in the first outlet, a coil spring disposed in the differential pressure valve frame and biasing the differential pressure valve body toward the differential pressure valve seat, and vibration of the differential pressure valve body. Bei to give a, and anti-vibration spring to prevent,
The anti-vibration spring is provided in the differential pressure valve body, and includes a plurality of elastic legs that are formed with protruding protrusions protruding outward and are slidably elastically contacted with the inner peripheral surface of the differential pressure valve frame. A solenoid valve with a differential pressure valve. 2. The solenoid valve with a differential pressure valve according to claim 1 , wherein the plurality of elastic legs extend in an axial direction of an inner peripheral surface of the differential pressure valve frame . The plurality of resilient legs, the differential pressure valve with solenoid valve according to claim 1, wherein the stretching in the circumferential direction of the differential pressure valve frame inner surface.