JPH0519765U - Expansion valve regulator - Google Patents

Abstract

(57) [Summary] [Purpose] To suppress the vibration of the expansion valve in evaporators such as air conditioners to prevent noise. [Structure] A piston 17 of a ball valve 13 and a piston 18 of a diaphragm 16 of an expansion valve 14 are inserted into both ends of an oil passage 19 filled with oil, and a refrigerant temperature sensor arranged on an outlet side of a cooler 21. 30 to the diaphragm left ventricle 28
Connect with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an expansion valve adjusting device for an evaporator in a vehicle air conditioner or the like.

[0002]

[Prior Art]

 As shown in FIG. 3, a conventional expansion valve adjusting device for an evaporator in a vehicle air conditioner has a valve body 2 having a ball valve 1 fixed at its central tip and a diaphragm 4 of an air chamber 3 arranged at equal intervals. The valve body 2 arranged in the expansion chamber 6 and connected by the actuating rod 5 of the book is urged by the spring 7, while the temperature of the refrigerant gas after cooling is fed back to the air chamber 3. When the temperature rises, the diaphragm 4 is displaced by being pushed by the air pressure in the air chamber 3, and the valve body 2 is biased rightward in FIG.

Therefore, heat is released after being compressed by a compressor (not shown), and the liquid cooling medium is ejected from the gap between the ball valve 1 and the valve seat 8 into the expansion chamber 6 to vaporize the amount of refrigerant. However, since the valve body 2 held by the diaphragm 4 and the spring 7 is arranged during the flow of the refrigerant in the expansion chamber 6, the vibration of the valve body 2 is caused by the flow of the refrigerant. And the like, which may cause noise due to the flow of the refrigerant and become a cause of air conditioner noise.

[0004]

[Problems to be solved by the device]

 The present invention aims to suppress the vibration of the expansion valve in the evaporator and eliminate the cause of noise.

[0005]

[Means for Solving the Problems]

 Therefore, the expansion valve adjusting device according to the present invention adjusts the fluid pressure in response to the expansion valve arranged in the refrigerant flow path, the refrigerant temperature sensing mechanism at the outlet side of the cooler, and the sensing temperature of the sensing mechanism. It has a diaphragm mechanism to be generated, and is configured to adjust the opening degree of the expansion valve by the fluid pressure generated by the diaphragm mechanism.

[0006]

[Action]

 In other words, the opening of the expansion valve is adjusted by the fluid pressure generated by the diaphragm mechanism, and the expansion valve does not have a floating portion as in the past, so it is easy to prevent the expansion valve from vibrating due to the flow of refrigerant. can do.

[0007]

【Example】

 Hereinafter, the embodiment of the present invention shown in FIG. 1 will be described in detail. An expansion valve 14 composed of a valve seat 12 and a ball valve 13 is provided in contact with an expansion chamber 11 of an expansion valve adjusting device main body 10 of an evaporator in a vehicle air conditioner, and the opening degree of the expansion valve 14 is adjusted as described later. It Further, the diaphragm 16 is attached to the diaphragm chamber 15 of the adjusting device main body 10, and the piston 17 integrated with the ball valve 13 and the piston 18 integrated with the diaphragm 16 are inserted into both ends of the oil passage 19, respectively. Filled with lubricating oil.

The expansion chamber 11 is connected to the cooler 21 by the flow path 20, further connected to the refrigerant compressor 23 by the flow path 22, passes through the radiator 25 of the flow path 24, and the ball valve of the control device main body 10. 13 It communicates with the upstream side. The right chamber 26 of the diaphragm chamber 15 communicates with the flow passage 20 by a pipe 27, and the left chamber 28 of the diaphragm chamber 15 communicates with a refrigerant temperature sensor 30 in the flow passage 22 by a pipe 29. The refrigerant temperature sensor 30 constitutes, for example, a coil tube arranged so as to be in contact with the inner surface of the flow path 22, and quickly senses the temperature of the refrigerant gas flowing in the flow path 22 and detects the air inside the coil tube. The expansion and contraction of (1) are transmitted to the left chamber 28 of the diaphragm chamber 15 via the conduit 29.

In the above apparatus, when the pressure of the refrigerant in the flow path 20 decreases due to the activation of the compressor 23 or the like, the pressure decrease is transmitted to the right chamber 26 of the diaphragm chamber 15 by the pipe 27, and the diaphragm 16 is moved to the position shown in FIG. As the piston 18 is pulled to the right, the piston 17 and the ball valve 13 are lifted through the lubricating oil in the oil passage 19 and the expansion valve 14 is opened, so that the compressor 23 liquefies the compressed liquid. The amount of the refrigerant cooled by the radiator 25 of the flow path 24 is jetted from the expansion valve 14 in an amount corresponding to the opening degree of the expansion valve 14, vaporized and cooled in the expansion chamber 11, and cooled through the flow path 20. The air is guided to the cooling device 21, the vehicle interior air is cooled in the cooling device 21, the temperature is raised, and the cooling air is sucked into the compressor 23 through the flow path 22 to end the cooling cycle.

On the other hand, when the temperature of the refrigerant gas flowing from the cooler 21 to the flow path 22 rises due to the cooling of the vehicle interior air or the like, the refrigerant temperature sensor 30 senses this and the left chamber 28 of the diaphragm chamber 15 is detected. Since the increase in the air pressure is transmitted to the diaphragm 16, the diaphragm 16 is pushed to the right in FIG. 1, the piston 18 is also pulled to the right, and the piston 17 and the ball valve 13 are lifted and expanded through the lubricating oil in the oil passage 19. The opening degree of the valve 14 becomes large, the amount of the refrigerant ejected from the expansion valve 14 and vaporized and cooled increases, and the cooling capacity of the cooler 21 increases, so that necessary cooling can be performed.

In this case, the ball valve 13 is stably supported by the piston 17 and the oil passage 19, and vibrations due to the refrigerant flow and the like are sufficiently suppressed, so that noise is generated in the portion of the expansion valve 14. The vehicle interior can be kept quiet and the comfortability of the vehicle can be easily improved.

As shown in FIG. 2, the ball valve 32 of the expansion valve 31 is arranged on the downstream side of the valve seat 33, and the piston 34 that receives fluid pressure and the ball valve 32 are connected by a piston rod 35. The structure of the diaphragm chamber for generating the fluid pressure can be reversed from that of the above-described embodiment to obtain the same effect as that of the above-described embodiment.

[0013]

In the expansion valve adjusting device according to the present invention, the opening of the expansion valve is adjusted by the fluid pressure generated by the diaphragm mechanism, and the expansion valve is stably supported. The expansion valve is prevented from resonating due to the flow of the refrigerant passing therethrough, and thus it is possible to easily prevent noise from being generated near the expansion valve.

[Brief description of drawings]

FIG. 1 is a schematic layout diagram of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part in another embodiment of the present invention.

FIG. 3 is a schematic view of a main part of a conventional device.

[Explanation of Codes] 10 Controller Main Body 12 Valve Seat 13 Ball Valve 14 Expansion Valve 16 Diaphragm 17 Piston 18 Piston 19 Oil Path 21 Cooler 23 Refrigerant Compressor 30 Refrigerant Temperature Sensor

Claims (1)

[Scope of utility model registration request] 1. A diaphragm mechanism having an expansion valve arranged in a refrigerant flow path, a mechanism for sensing a refrigerant temperature at an outlet side of a cooler, and a diaphragm mechanism for generating a fluid pressure in accordance with a sensed temperature of the sensing mechanism. An expansion valve adjusting device configured to adjust the opening degree of the expansion valve by the fluid pressure generated by.