JPS5986765A - High pressure regulating valve - Google Patents

Abstract

PURPOSE:To provide a compact, simpler but low cost high pressure regulating valve by allowing communication between an inlet passage and an outlet passage through a valve passage by sliding a valve when the inlet pressure at a valve port from a communicating passage in the valve body exceeds a specified value. CONSTITUTION:A valve body 14 has an inlet passage 15 and an outlet passage 16 for refrigerant, and a communicating passage 17 is provided to the inlet passage 15, extending laterally therefrom to communicate to a valve port 18. The valve chamber 19 communicating to the valve port 18 is provided with a valve 20 having a valve passage 22 which corresponds to the inlet passage 15 and outlet passage 16, and spring 21 which presses the valve 20. When overloaded, the refrigerant condensed in a heat exchanger acts upon the inlet 15, and when the pressure exceeds a specified value, the refrigerant pressure reaches from the communicating passage 17 to the valve port 18 to displace the valve 20 compressing the spring 21. As a result, ports for the inlet passage 15a and valve passage 22a, and ports for the outlet passage 16a and valve passage 22b are communicated respectively so as to regulate the flow rate of the refrigerant in accordance with the area of alignment which is responsive to the pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high pressure regulating valve for a refrigeration cycle or the like in a heat pump type air conditioner.

Conventional configuration and its problems In a heat pump air conditioner in which the compressor, four-way valve, outdoor heat exchanger, expansion mechanism, and indoor heat exchanger are connected in sequence (11), when overloaded, the discharge pressure is When the pressure rises above a predetermined pressure, a high-pressure pressure regulating valve is installed, a part of the ?9 medium is condensed in an outdoor heat exchanger, and the condensed liquid refrigerant is passed through the high-pressure regulating valve. This is a countermeasure against overload by flowing the water to the suction pipe side, lowering the temperature on the suction pipe side, and lowering the discharge temperature and pressure.3 Conventionally, this high-pressure pressure regulating valve used a diaphragm type. This diaphragm type has a diaphragm made of thin film metal such as phosphor bronze, stainless steel, copper, etc. This diaphragm is sandwiched and springs are installed at the top and bottom, and the relationship between these springs and the pressing force is , opens and closes the valve body to return refrigerant to the suction pipe side.

However, this diaphragm type has the drawback of significantly increasing manufacturing costs.

OBJECTS OF THE INVENTION The object of the present invention is to provide a high positive pressure regulating valve that is simple and inexpensive.

An inlet pipe and an outlet pipe are connected to the main body of the valve constituting the invention, a communication passage is provided that communicates with the valve port laterally from the inlet pipe, and the inlet pipe is connected to the valve chamber that communicates with the valve boat. and a valve provided with a torrent flow path that matches the outlet pipe, and a spring that presses the valve. When the pressure applied from the communicating path to the valve boat exceeds a predetermined pressure, the inlet pipe and the outlet pipe are connected. , which communicates with the torrent flow path to allow refrigerant, etc. to flow therethrough.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. In Figure 1, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is a check valve, 6 is a heating capillary tube, 8 is an air conditioning capillary tube, 7 is an indoor heat exchanger, and 8 is an indoor heat exchanger. An accumulator 9 is a high-pressure pressure regulating valve according to the present invention, in which the refrigerant is condensed in a heat exchanger 12 from a branch pipe 11 branched from a discharge pipe 10, passes through a high-pressure pressure regulating valve 9, and passes through a suction pipe. It returns to 12. FIG. 2 is a detailed view of the high-pressure pressure regulating valve 9. 14 is a main body, 16 is an inlet pipe for liquid refrigerant, 16 is an outlet pipe thereof, 17 is a communication passage connected to the valve port 18 toward the side of the inlet pipe 16;
19 is a valve chamber, and this valve chamber 19 has a valve 20. A spring 21 is provided that constantly presses the valve 20. 2
2 is a torrent flow path provided in the valve 20, and this torrent flow path 22 has a valve flow path opening 22a1 and a torrent flow path 22b, and the inlet pipe 15
When the pressure between the communication port 16a of the outlet pipe 16 and the communication port 16a of the outlet pipe 16 exceeds a predetermined pressure in the inlet pipe 15, the communication port 16a and the communication port 16a of the outlet pipe 16 slide, and the communication port 15a and the torrent flow path 22a and the communication port 16a and the torrent flow path 22b each have a matching area. Communicating while having a forest. A second spring 23 has a threaded portion 24, and the spring 21 can be adjusted depending on the degree of screwing.

In the above configuration, when the pressure in the discharge pipe 10 increases during overload, the pressure in the branch pipe 11 also increases, and the liquid refrigerant condensed in the heat exchange section 12 is applied to the inlet pipe 15.

When the pressure at this time exceeds the predetermined pressure, the refrigerant pressure becomes
The communication path 17 leads to the valve port 18.

This refrigerant pressure becomes greater than the pressing force of the spring 21 and pushes the spring 21, causing the valve 2o to slide toward the spring. When sliding, depending on the pressure at that time, the communication port 15a, the torrent flow path 22a1, and the communication port 16
a and the torrent flow path 22b are brought into communication, and the flow rate of the refrigerant is adjusted by the matching area due to pressure. That is, the refrigerant flowing from the inlet pipe 16, through the torrent flow path 22, and into the outlet pipe 16 flows into the suction pipe 13 while being regulated, thereby lowering the refrigerant temperature in the suction pipe 13 and the temperature in the discharge pipe 1o.

Effects of the invention There is a diaphragm type high pressure regulating valve.
This diaphragm type is expensive. For that reason,
There is also a simple check valve with a built-in spring structure, but in this case, the valve operates due to the pressure difference between the refrigerant inlet and outlet, so a certain pressure difference is created and the valve opens. When the valve starts to vibrate, the differential pressure decreases and the valve tries to close. When the valve closes, the differential pressure increases, which can easily cause a hunting condition, which can cause problems with noise, durability, etc. There is. Therefore, in the high-pressure pressure regulating valve according to the present invention, an inlet pipe and an outlet pipe are connected to the main body, and a communication passage is provided from the inlet pipe toward the side of the valve chamber to communicate with the valve port. A valve with a torrent flow path that matches the inlet pipe and the outlet pipe and whose refrigerant flow rate is adjusted according to its area, and a spring that presses this valve are provided in the room, and the valve boat is connected to the valve boat from the communication path. 1 When the pressure exceeds a predetermined pressure, the inlet pipe and the outlet pipe communicate with the torrent flow path, and the refrigerant flow l is adjusted according to the inlet pressure and flows into the suction pipe, so a hunting state occurs. Moreover, it produces practical effects such as being able to obtain a small, simply constructed and low cost pressure regulating valve.

[Brief explanation of the drawing]

FIG. 1 is a refrigerant circuit diagram of a heat pump air conditioner using a high pressure regulating valve according to an embodiment of the present invention, and FIG. 2 is a detailed configuration diagram of the same high pressure regulating valve. 14...Body, 15...Inlet pipe, 16
...Inlet pipe, 16...Outlet pipe, 17.
...Communication path, 18...Valve port, 19.
...Valve chamber, 20...Valve, 21...
・Spring, 22... Valve flow path.

Claims (1)

[Claims] An inlet pipe and an outlet pipe are connected to the main body, and a communication path is provided that communicates from the inlet pipe to the valve boat, and a valve chamber that is connected to the valve port is provided, and a valve flow path that communicates the inlet pipe and the outlet pipe is provided. A valve is movably provided in the valve chamber, and a spring is provided to press the valve to bias the valve against the pressure from the valve boat, so that the inlet pressure applied from the communication passage to the valve port is maintained at a predetermined level. A high-pressure pressure regulating valve, wherein the valve is arranged at a position where the valve flow path, the inlet pipe, and the outlet pipe do not communicate with each other when the pressure is lower than that.