Anti-oscillation suction pressure control valve for refrigeration compressor

Abstract

The utility model relates to an anti-oscillation suction pressure control valve for a refrigeration compressor, which comprises a valve body and a valve cover, an inlet of the valve body is connected with a gas-liquid separation barrel, an outlet of the valve body is connected with the compressor, a valve rod is arranged in the valve body, the valve rod is arranged between a valve core and a connecting block, the valve core is arranged at the inlet of the valve body, and the side surface of the connecting block is connected with a corrugated pipe. The corrugated pipe is fixed on the valve cover through the positioning block, a spring cavity is arranged in the valve cover, a spring is arranged in the spring cavity, the top end of the spring is connected with the connecting block, the tail end of the spring is arranged in a spring seat, a plug cap is arranged on the outer side of the spring seat and arranged in the center of the valve cover, and a dustproof plug is plugged in the center of the plug cap. The valve element is arranged at the inlet, the corrugated pipe is controlled by the pressure at the outlet end, the situation that the outlet pressure is too low due to too high inlet pressure is avoided, supporting rings are arranged on the valve element and the chaining block, poor action of the valve element is prevented, the spring cavity is communicated with the outside through the throttling hole, vibration of the corrugated pipe is prevented, and it is guaranteed that the valve cannot make abnormal sounds when working.

Description

Technical Field

[0001] This invention relates to refrigeration compressor systems, and in particular to an anti-vibration suction pressure control valve for refrigeration compressors. Background Technology

[0002] The suction pressure control valve is installed between the gas-liquid separator and the compressor, and its main function is to protect the compressor. During startup, it adjusts the flow rate according to the pressure at the suction valve outlet. Excessive flow will cause compressor overload, while insufficient flow will result in ineffective cooling. After shutdown, the suction pressure control valve closes to prevent compressor motor overload when restarting after a prolonged period of inactivity (when the gas-liquid separator is under high pressure).

[0003] Currently, the bellows of the intake pressure valve is controlled by the inlet pressure, while the valve core is located at the outlet, resulting in a larger stress area and unstable control pressure. When the valve core is in a semi-open state, the bellows will vibrate, causing abnormal valve noise and shortening its lifespan. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an anti-vibration suction pressure control valve for refrigeration compressors.

[0005] The purpose of this utility model is achieved through the following technical solution: an anti-vibration suction pressure control valve for a refrigeration compressor, comprising a valve body and a valve cover, wherein the inlet of the valve body is connected to a gas-liquid separator, the outlet of the valve body is connected to the compressor, a valve stem is provided in the valve body, the valve stem is placed between the valve core and the connecting block, the valve core is placed at the inlet of the valve body, a bellows is connected to the side of the connecting block, the bellows is fixed to the valve cover by a positioning block, a spring cavity is provided in the valve cover, a spring is provided in the spring cavity, the top end of the spring is connected to the connecting block, the tail end of the spring is placed in the spring seat, a plug is provided on the outside of the spring seat, the plug is placed in the center of the valve cover, and a dust plug is inserted in the center of the plug.

[0006] A further improvement of this utility model is that a throttling orifice is provided on the plug cap, which allows the spring cavity to communicate with the outside.

[0007] A further improvement of this utility model is that the valve body and the valve cover are connected by a flange, and a gasket and a sealing ring are provided between them.

[0008] A further improvement of this utility model is that a support ring is provided on both the valve core and the connecting block.

[0009] A further improvement of this utility model is that pads are provided at both ends of the corrugated pipe.

[0010] The advantages of this utility model compared with the prior art are as follows:

[0011] This invention places the valve core at the inlet, and the bellows is controlled by the outlet pressure to prevent the outlet pressure from being too low due to excessive inlet pressure. In addition, both the valve core and the connecting block are equipped with support rings to prevent the valve core from malfunctioning. Furthermore, the spring cavity is connected to the outside through the throttling hole to prevent the bellows from vibrating and to ensure that the valve does not make any abnormal noises during operation. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the valve core in the open state of this utility model;

[0013] Figure 2 This is a schematic diagram of the valve core in the closed state of this utility model;

[0014] The following numbers are labeled in the diagram: 1-valve body, 1-1-inlet, 1-2-outlet, 2-valve cover, 3-valve stem, 4-valve core, 5-connecting block, 6-bellows, 7-positioning block, 8-spring, 9-spring seat, 10-plug cap, 11-dust plug, 12-throttle orifice, 13-gasket, 14-sealing ring, 15-support ring, 16-pad block. Detailed Implementation

[0015] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0016] The figure illustrates a specific embodiment of the anti-vibration suction pressure control valve for a refrigeration compressor according to this utility model: It includes a valve body 1 and a valve cover 2, connected by a flange, with a gasket 13 and a sealing ring 14 between them for double sealing and better sealing effect; the inlet 1-1 of the valve body 1 is connected to a gas-liquid separator, and the outlet 1-2 of the valve body 1 is connected to the compressor; a valve stem 3 is provided inside the valve body 1, positioned between a valve core 4 and a connecting block 5; both the valve core 4 and the connecting block 5 are provided with support rings 15 to prevent malfunction of the valve core; the valve core 4 is located at the inlet 1-1 of the valve body 1, and the side of the connecting block 5... The bellows 6 is connected to the valve cover 2. The valve core is set at the inlet. The bellows is controlled by the pressure at the outlet end to prevent the outlet pressure from being too low due to excessive inlet pressure. The bellows 6 is fixed to the valve cover 2 by the positioning block 7. Both ends of the bellows 6 are provided with pads 16. The valve cover 2 is provided with a spring cavity, and a spring 8 is provided in the spring cavity. The top end of the spring 8 is connected to the connecting block 5, and the tail end of the spring 8 is placed in the spring seat 9. A plug cap 10 is provided on the outside of the spring seat 9. The plug cap 10 is placed in the center of the valve cover 2. A dust plug 11 is plugged in the center of the plug cap 10. A throttling hole 12 is opened on the plug cap 10, which allows the spring cavity to communicate with the outside, preventing the bellows from vibrating.

[0017] Working principle:

[0018] Before the machine starts: the pressure in the gas-liquid separator is 8 to 16 bar, and the valve core is in the closed state.

[0019] Compressor startup: The main unit operates, the outlet pressure decreases, and the force acting on the bellows decreases. When the force on the bellows cannot overcome the bellows elasticity and spring force, the valve core opens slightly, drawing in condensate; when the forces at both ends of the bellows are equal, the valve core is at rest, thus achieving a stable state.

[0020] Compressor stops: The main unit stops running, the pressure of the gas-liquid separator enters the main unit cavity, the inlet pressure and outlet pressure of the valve body are equal, the bellows and spring are fully compressed, and the valve core is in the closed state.

[0021] The applicant further declares that while the above embodiments illustrate the implementation method and apparatus structure of this utility model, this utility model is not limited to the above-described embodiments, meaning that this utility model must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions for the selected implementation methods, additions of steps, and selection of specific methods all fall within the protection and disclosure scope of this utility model.

[0022] This utility model is not limited to the above-described embodiments. All methods that use similar structures and methods to achieve the purpose of this utility model are within the protection scope of this utility model.

Claims

1. A vibration-resistant suction pressure control valve for a refrigeration compressor, comprising a valve body (1) and a valve cover (2), wherein the inlet (1-1) of the valve body (1) is connected to a gas-liquid separator, and the outlet (1-2) of the valve body (1) is connected to the compressor, characterized in that: The valve body (1) is provided with a valve stem (3), which is placed between the valve core (4) and the connecting block (5). The valve core (4) is placed at the inlet (1-1) of the valve body (1). The side of the connecting block (5) is connected to the bellows (6), which is fixed to the valve cover (2) by the positioning block (7). The valve cover (2) is provided with a spring cavity, which is provided with a spring (8). The top of the spring (8) is connected to the connecting block (5), and the tail of the spring (8) is placed in the spring seat (9). The outside of the spring seat (9) is provided with a plug (10), which is placed in the center of the valve cover (2). The center of the plug (10) is filled with a dust plug (11).

2. The anti-vibration suction pressure control valve for a refrigeration compressor according to claim 1, characterized in that: The plug cap (10) has a throttling orifice (12), which allows the spring cavity to communicate with the outside.

3. The anti-vibration suction pressure control valve for a refrigeration compressor according to claim 1, characterized in that: The valve body (1) and valve cover (2) are connected by a flange, and a gasket (13) and a sealing ring (14) are provided between them.

4. The anti-vibration suction pressure control valve for a refrigeration compressor according to claim 1, characterized in that: Both the valve core (4) and the connecting block (5) are provided with support rings (15).

5. The anti-vibration suction pressure control valve for a refrigeration compressor according to claim 1, characterized in that: Both ends of the bellows (6) are provided with pads (16).

Images