CN111623566A - One-way refrigerating system throttle valve - Google Patents

Abstract

The invention discloses a one-way refrigerating system throttle valve which consists of a valve body shell, a limiting spring, a nozzle slide block and a pressure relief notch, wherein the limiting spring is arranged on the valve body shell; a spring limiting structure and a nozzle limiting structure are arranged inside the valve body shell, a pressure relief notch is formed among the inner cavity of the valve body shell, the spring limiting structure and the nozzle limiting structure, one end of the nozzle sliding block is abutted against the nozzle limiting structure under the elastic force of the limiting spring, the nozzle sliding block covers the pressure relief notch, when one side of the nozzle sliding block is extruded by external force to the limiting spring, the limiting spring is continuously compressed, the pressure relief notch is exposed, the nozzle sliding block is provided with a nozzle, and the inside of the valve body shell is of a cavity structure; the nozzle slide block is in a funnel shape. The invention adopts the nozzle structure to achieve the purpose of expansion throttling, overcomes the tension of the spring through the pressure difference at the two ends of the nozzle sliding block, realizes the movement of the nozzle sliding block, throttles part of refrigerant from the pressure relief notch, removes the high pressure at the high pressure side, and realizes the stable operation of the unit under the high pressure working condition.

Description

A one-way refrigeration system throttle valve

technical field

The invention relates to the technical field of throttling components in the refrigeration, air conditioning and heat pump industries, in particular to a throttling valve for a one-way refrigeration system.

Background technique

The throttling components in the traditional refrigeration heat pump industry generally use electronic expansion valves, thermal expansion valves, and capillary tubes to achieve system throttling. The electronic expansion valve has a complex structure, high processing cost, increased unit control cost, poor stability of electronic equipment and easy to lose control. The thermal expansion valve has a relatively complex structure, high processing cost, low control precision, and cannot respond to the valve opening in time according to the pressure. However, the capillary has a single structure and cannot be adjusted, which may easily lead to high-voltage faults in the system when adapting to high-load and high-pressure conditions.

In order to solve this problem, the present invention is hereby proposed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a one-way refrigeration system throttle valve to ensure the stable operation of the unit using the throttle valve under high pressure and high load conditions.

The object of the present invention can be realized through the following technical solutions:

A one-way refrigeration system throttle valve is composed of a valve body shell, a limit spring, and a nozzle slider; the valve body shell is provided with a spring limit structure and a nozzle limit structure, and the limit spring, the nozzle slide The block is located in the inner cavity of the valve body shell, and there is a pressure relief notch between the inner cavity of the valve body shell, the spring limit structure and the nozzle limit structure. One end of the block rests on the nozzle limit structure, and the nozzle slider covers the pressure relief notch. When one side of the nozzle slider is squeezed by an external force, the limit spring will continue to be compressed, and the pressure relief notch will be exposed. The nozzle slider is provided with a nozzle.

Further, a throttle outlet is provided in the middle of the spring limiting structure, and a throttle inlet is provided in the middle of the nozzle limiting structure.

Further, the inside of the valve body shell is a cavity structure.

Further, the nozzle slider is in the shape of a funnel.

Further, the nozzle slider further includes a bottom, and the funnel shape formed by the nozzle slider forms a refrigerant channel, and the refrigerant enters from the bottom and flows out from the nozzle.

Further, the valve body casing includes an inlet and an outlet, and the refrigerant flowing through the valve body casing flows in from the inlet and flows out from the outlet.

Preferably, a rubber sealing ring is provided between the nozzle limiting structure and the inner wall of the valve body shell.

Further, the throttle outlet and the throttle inlet are in a through-hole structure, and the diameter of the throttle outlet is smaller than the diameter of the throttle inlet.

Further, the limit spring is in a compressed state in the inner cavity of the valve body casing.

Preferably, the limit spring and the nozzle slider are located in the inner cavity of the valve body shell, the limit spring and the nozzle slider are located in the space formed by the spring limit structure and the nozzle limit structure, and the limit spring One end of the nozzle is abutted on the spring limiting structure, the other end is abutted on the nozzle slider, and the other end of the nozzle slider is abutted on the nozzle limiting structure.

Beneficial effects of the present invention:

1. The one-way refrigeration system throttling valve of the present invention realizes the throttling effect of the refrigeration system, and at the same time can be automatically adjusted according to the pressure, and the pressure is automatically unloaded under high load conditions to avoid high pressure in the system.

2. The one-way refrigeration system throttle valve of the present invention adopts the nozzle structure, which replaces the capillary throttling to achieve the purpose of expansion and throttling. At the same time, the pressure difference between the two ends of the nozzle slider overcomes the spring tension and realizes the movement of the nozzle slider. Part of the refrigerant is throttled from the pressure relief slot to relieve the excessive pressure on the high pressure side, so as to realize the stable operation of the unit under high pressure and high load conditions.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

FIG. 1 is a schematic top-view structural diagram of the throttle valve of the one-way refrigeration system of the present invention under normal operating conditions.

FIG. 2 is a schematic diagram of the front structure of the throttle valve of the one-way refrigeration system of the present invention under normal operating conditions.

FIG. 3 is a schematic top-view structural diagram of the throttle valve of the one-way refrigeration system of the present invention operating in a high pressure range.

4 is a schematic diagram of the front structure of the throttle valve of the one-way refrigeration system of the present invention operating in a high pressure range.

Reference number:

1-valve body shell; 2-limit spring; 3-nozzle slider; 4-rubber sealing ring; 5-nozzle; 6-pressure relief notch; 7-spring limit structure; 8-nozzle limit structure; 9 - throttle inlet; 10 - throttle outlet; 11 - inlet; 12 - outlet; 13 - bottom.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figure 1-4, a one-way refrigeration system throttle valve, which consists of valve body shell 1, limit spring 2, nozzle slider 3, nozzle 5, pressure relief slot 6, spring limit structure 7, The nozzle limit structure 8 is composed; the valve body shell 1 is provided with a spring limit structure 7 and a nozzle limit structure 8, and a throttle outlet 10 is arranged in the middle of the spring limit structure 7, and the middle of the nozzle limit structure 8 A throttle inlet 9 is provided, the throttle outlet 10 and the throttle inlet 9 are through-hole structures, and the diameter of the throttle outlet 10 is smaller than the diameter of the throttle inlet 9 .

A pressure relief notch 6 is provided between the inner cavity of the valve housing 1, the spring limiting structure 7 and the nozzle limiting structure 8. Under the elastic force of the limiting spring 2, one end of the nozzle sliding block 3 abuts against the nozzle block 3. On the nozzle limit structure 8, the nozzle slider 3 covers the pressure relief notch 6. When one side of the nozzle slider 3 is squeezed by an external force to squeeze the limit spring 2, the limit spring 2 continues to compress, and the pressure relief notch 6 exposed.

The inside of the valve body shell 1 is a cavity structure.

The limit spring 2 and the nozzle slider 3 are located in the inner cavity of the valve body shell 1 , and the limit spring 2 and the nozzle slider 3 are located in the space formed by the spring limit structure 7 and the nozzle limit structure 8 . One end of the limiting spring 2 abuts on the spring limiting structure 7 , the other end rests on the nozzle slider 3 , and the other end of the nozzle slider 3 abuts on the nozzle limiting structure 8 .

Preferably, the limit spring 2 is in a compressed state in the inner cavity of the valve housing 1 .

The nozzle slider 3 includes a nozzle 5 and a bottom 13 , the nozzle slider 3 is in the shape of a funnel, and the funnel shape formed by the nozzle slider 3 forms a refrigerant channel, the refrigerant enters from the bottom 13 and flows from the nozzle 5 . outflow.

The nozzle 5 is in contact with one end of the limit spring 2 .

The valve housing 1 includes an inlet 11 and an outlet 12 , and the refrigerant flowing through the valve housing 1 flows in from the inlet 11 and flows out from the outlet 12 .

The nozzle slider 3 slides left and right in the middle cavity formed by the spring limiting structure 7 and the nozzle limiting structure 8 .

Preferably, a rubber sealing ring 4 is provided between the nozzle limiting structure 8 and the inner wall of the valve body shell 1, and the rubber sealing ring is used to seal the space between the nozzle limiting structure 8 and the valve body shell 1 to prevent The refrigerant flows out from the space between the sealing nozzle limiting structure 8 and the valve body casing 1 .

Referring to Figure 1-2, when in use, the left side of the throttle valve is welded to the low-pressure side pipeline, and the right side is welded to the high-pressure side pipeline. When the unit is running under normal conditions, the unit pressure is moderate, and the refrigerant flows from the right side to the On the left side, due to the spring pressure of the limit spring, the slider is pushed to the right side. At this time, the nozzle slider covers the pressure relief notch, and the refrigerant is completely throttled by the nozzle.

Referring to Figure 3-4, when the unit is operating in the high pressure range, due to the increase of the high pressure of the high-pressure side pipeline on the right, the pressure gradually overcomes the spring tension of the limit spring, and the nozzle slider gradually pushes to the left as the pressure increases. side, the pressure relief slot is gradually exposed, so that a part of the refrigerant is throttled from the pressure relief slot. Part of the refrigerant is throttled to the pressure relief slot, which alleviates the system problem caused by insufficient throttling of the nozzle under high pressure operation, and realizes the stable operation of the unit under all working conditions.

Compared with the electronic expansion valve, the above-mentioned throttle valve has simpler structure, convenient installation, stable automatic pressure relief control, and the unit does not need to increase the control cost separately.

When the pressure on the high-pressure side of the refrigeration system is large enough, the nozzle slider is pushed from the right side to the left side, exposing the pressure relief notch; in normal operation of the throttle valve, the nozzle slider covers the pressure relief notch, and in the high-pressure operation the throttle valve, the nozzle Slider exposes pressure relief notch.

While the basic principles and main features and advantages of the present invention have been shown and described above, it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but without departing from the spirit or essential aspects of the present invention. In the case of the characteristic features, the present invention can be implemented in other specific forms. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the appended claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. A one-way refrigeration system throttle valve, characterized in that it is composed of a valve body casing (1), a limit spring (2), and a nozzle slider (3); the valve body casing (1) is provided with a A spring limit structure (7) and a nozzle limit structure (8), the limit spring (2) and the nozzle slider (3) are located in the inner cavity of the valve body shell (1), and are located in the valve body shell (1) A pressure relief notch (6) is arranged between the inner cavity of the valve, the spring limiting structure (7) and the nozzle limiting structure (8). One end of the slider (3) is pressed against the nozzle limiting structure (8), and the nozzle slider (3) covers the pressure relief notch (6). The position spring (2), the limit spring (2) continues to be compressed, the pressure relief notch (6) is exposed, and the nozzle slider (3) is provided with a nozzle (5). 2. The one-way refrigeration system throttle valve according to claim 1, characterized in that a throttle outlet (10) is provided in the middle of the spring limiting structure (7), and a throttle outlet (10) is provided in the middle of the nozzle limiting structure (8) Throttle inlet (9). 3. The one-way refrigeration system throttle valve according to claim 1, characterized in that, the inside of the valve body shell (1) is a cavity structure. 4. The one-way refrigeration system throttle valve according to claim 1, wherein the nozzle slider (3) is in the shape of a funnel. 5. The one-way refrigeration system throttle valve according to claim 1, wherein the nozzle slider (3) further comprises a bottom (13), and the funnel shape formed by the nozzle slider (3) forms a refrigerant channel, the refrigerant enters from the bottom (13) and exits from the nozzle (5). 6. The one-way refrigeration system throttle valve according to claim 1, wherein the valve body casing (1) comprises an inlet (11) and an outlet (12), and the refrigerant flowing through the valve body casing (1) It flows in from the inlet (11) and flows out from the outlet (12). 7 . The one-way refrigeration system throttle valve according to claim 1 , wherein a rubber sealing ring ( 4 ) is arranged between the nozzle limiting structure ( 8 ) and the inner wall of the valve body shell ( 1 ). 8 . 8. The one-way refrigeration system throttle valve according to claim 6, wherein the throttle outlet (10) and the throttle inlet (9) are through-hole structures, and the throttle outlet (10) The diameter is smaller than the diameter of the throttle inlet (9). 9 . The one-way refrigeration system throttle valve according to claim 1 , wherein the limit spring ( 2 ) is in a compressed state in the inner cavity of the valve body shell ( 1 ). 10 . 10. The one-way refrigeration system throttle valve according to claim 6, wherein the limit spring (2) and the nozzle slider (3) are located in the spring limit structure (7) and the nozzle limit structure (8). ), one end of the limit spring (2) abuts on the spring limit structure (7), the other end abuts on the nozzle slider (3), and the other end of the nozzle slider (3) Abut on the nozzle limit structure (8).

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