CO2 refrigeration pressure reducing valve and CO2 refrigeration system

Abstract

The utility model discloses a CO2 refrigeration pressure reducing valve and a CO2 refrigeration system, and belongs to the technical field of pressure reducing valves, the CO2 refrigeration pressure reducing valve comprises a pressure reducing pipe, a baffle plate which is arranged in the pressure reducing pipe and is used for blocking partial CO2 gas circulation, a through hole which is arranged in the baffle plate and is used for CO2 gas circulation, and a sealing structure which is arranged in the pressure reducing pipe and is used for blocking the through hole. According to the utility model, the baffle plate arranged in the pressure reducing pipe can be used for performing pressure reducing operation on passing CO gas, the motor can be used for adjusting the opening degree of the through hole, so that the pressure reducing degree of gas can be adjusted, and the worm gear and the movable sleeve rod are in threaded fit to operate the opening and closing of the through hole, so that the accurate transmission ratio can be realized; therefore, it is ensured that the moving position of the umbrella-shaped rubber plug can be accurately controlled, the pressure of the low-pressure side can be checked in cooperation with a pressure gauge, the gas circulation pressure can be accurately adjusted, it is ensured that the pressure is constant after gas passes through, and the gas pressure reduction effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, specifically to a CO2 refrigeration pressure reducing valve and a CO2 refrigeration system. Background Technology

[0002] The CO2 refrigeration pressure reducing valve is a key component in the refrigeration system. Its main function is to reduce the refrigerant pressure on the high-pressure side and stabilize it within the required pressure range on the low-pressure side. This pressure reduction process is crucial for the efficiency and stability of the refrigeration system.

[0003] Chinese Patent Publication No. CN218207995U discloses an external CO2 refrigeration pressure reducing valve, including a pressure reducing pipe, an adjusting box, and a pressure gauge. The adjusting box is welded to the top of the pressure reducing pipe, and a pressure gauge is installed on the top of the adjusting box. A pressure reducing component is installed inside the pressure reducing pipe, and the top of the pressure reducing component extends into the adjusting box. A pressure regulating component is installed inside the adjusting box, and one end of the pressure regulating component is engaged with the top of the pressure reducing component. This invention has the advantages of automatically adjusting the internal pressure according to the gas pressure inside the pipe, and adjusting the gas pressure inside the pipe as needed, eliminating the need for manual operation, avoiding frostbite, and improving safety.

[0004] In the aforementioned prior art, the pressure reduction level of the gas can be adjusted by controlling the rotation of the pressure reducing component. However, the pressure reducing component is connected by a spring and is always in an active state. When CO2 gas flows, it is easy to interact with the gas medium, which may cause fluctuations in gas pressure, thereby affecting the pressure regulation accuracy of the pressure reducing valve and making it inconvenient to accurately adjust the pressure after the gas passes through. Utility Model Content

[0005] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a CO2 refrigeration pressure reducing valve and a CO2 refrigeration system to solve some or all of the problems in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A CO2 refrigeration pressure reducing valve, comprising:

[0008] Pressure reducing tube;

[0009] A baffle, placed inside the pressure reducing pipe, is used to block part of the CO2 gas flow.

[0010] A through hole, located inside the baffle, is used to allow CO2 gas to flow through;

[0011] A sealing structure, located inside the pressure-reducing pipe, is used to seal the through hole;

[0012] An adjustment structure, arranged on the sealing structure, is used to control the movement and opening / closing of the sealing structure;

[0013] An extrusion structure, arranged on a sealing structure, is used to compress the sealing structure and maintain its sealing effect.

[0014] Preferably, the sealing structure includes:

[0015] A connector is located on the outer surface of the pressure reducing pipe;

[0016] The movable sleeve rod is slidably installed inside the connecting seat and the pressure reducing pipe;

[0017] The retaining ring is fixedly sleeved on the movable sleeve rod;

[0018] An umbrella-shaped rubber stopper is movably fitted onto a movable sleeve rod, with the umbrella-shaped rubber stopper located on one side of the retaining ring;

[0019] The umbrella-shaped rubber plug contacts the inner wall of the through hole to seal it.

[0020] Preferably, the adjustment structure includes:

[0021] The L-shaped bracket is positioned on one side of the connector.

[0022] The worm gear is rotatably mounted on the connecting seat and the L-shaped bracket;

[0023] The threaded hole is located inside the worm gear;

[0024] The worm gear is threaded onto the movable sleeve through a threaded hole, and the surface of the movable sleeve is provided with a thread that matches the threaded hole.

[0025] The drive assembly, located on the worm gear, is used to drive the worm gear to rotate;

[0026] A limiting component, arranged on the worm gear, is used to limit the position of the worm gear when it rotates.

[0027] Preferably, the driving component includes:

[0028] The support frame is mounted on the connecting seat;

[0029] The pivot is rotatably mounted inside the support frame;

[0030] The worm is fixedly sleeved on the rotating shaft, and the worm meshes with the worm wheel;

[0031] The motor is located on one side of the support frame, with its output end located at one end of the rotating shaft to drive the shaft to rotate.

[0032] Preferably, the limiting component includes two limiting rings, which are respectively arranged on one side of the connecting seat and the L-shaped bracket, and both limiting rings are rotatably installed inside the worm gear.

[0033] Preferably, the adjustment structure further includes a guide assembly arranged on the movable sleeve rod to limit the direction of movement of the movable sleeve rod.

[0034] Preferably, the guide component includes:

[0035] The guide frame is fixedly mounted on the movable sleeve rod;

[0036] The guide hole is located inside the guide frame;

[0037] The guide rod is arranged on one side of the L-shaped bracket and is slidably installed inside the guide hole.

[0038] Preferably, the extrusion structure includes:

[0039] Adjusting screw;

[0040] The screw cap and pressure plate are respectively arranged at both ends of the adjusting screw, and the pressure plate is in contact with the umbrella-shaped rubber plug;

[0041] The threaded hole is located inside the movable sleeve rod, and the adjusting screw thread is installed inside the threaded hole.

[0042] This utility model also provides a CO2 refrigeration system, including the aforementioned CO2 refrigeration pressure reducing valve.

[0043] The beneficial effects of this utility model are as follows:

[0044] This invention utilizes a baffle plate within the pressure-reducing tube to reduce the pressure of passing CO gas. An adjustable motor allows for customization of the opening degree of the through-hole, thus regulating the degree of gas pressure reduction. Furthermore, the threaded engagement of a worm gear and a movable sleeve rod operates the through-hole, enabling precise transmission ratios and ensuring accurate control of the umbrella-shaped rubber stopper's movement. A pressure gauge can be used to monitor the low-pressure side, allowing for precise adjustment of the gas flow pressure and ensuring a constant pressure after gas passage, thereby enhancing the gas pressure reduction effect.

[0045] In this invention, if the umbrella-shaped rubber plug does not fit tightly against the through hole when the pressure reducing tube is closed, the pressure plate can be squeezed by rotating the adjusting screw to press the umbrella-shaped rubber plug against the through hole, ensuring that the umbrella-shaped rubber plug fits tightly against the through hole and avoiding affecting the sealing effect of the through hole. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A schematic diagram of the structure of a CO2 refrigeration pressure reducing valve and a CO2 refrigeration system provided in this embodiment of the present invention;

[0048] Figure 2 A cross-sectional structural diagram of a CO2 refrigeration pressure reducing valve and a CO2 refrigeration system provided for an embodiment of this utility model;

[0049] Figure 3 A schematic diagram of the movable sleeve structure of a CO2 refrigeration pressure reducing valve and a CO2 refrigeration system provided in this embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of a CO2 refrigeration pressure reducing valve and a connection seat for a CO2 refrigeration system provided in an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Pressure reducing pipe; 2. Baffle; 3. Through hole; 4. Connecting seat; 401. Movable sleeve rod; 402. Retaining ring; 403. Umbrella-shaped rubber plug; 5. L-shaped bracket; 501. Worm gear; 502. Threaded hole; 503. Support frame; 504. Rotating shaft; 505. Worm; 506. Motor; 507. Limiting ring; 508. Guide frame; 509. Guide hole; 510. Guide rod; 6. Adjusting screw; 601. Screw cap; 602. Pressure plate; 603. Threaded hole. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0054] Example 1:

[0055] like Figures 1 to 4As shown, this utility model provides a CO2 refrigeration pressure reducing valve and a CO2 refrigeration system, including: a pressure reducing pipe 1 and a baffle 2 arranged inside the pressure reducing pipe 1 to block part of the CO2 gas flow, a through hole 3 opened inside the baffle 2 for CO2 gas flow, and a sealing structure arranged inside the pressure reducing pipe 1 to seal the through hole 3.

[0056] The sealing structure includes a connecting seat 4 arranged on the outer surface of the pressure reducing pipe 1, a movable sleeve 401 slidably installed inside the connecting seat 4 and the pressure reducing pipe 1, a retaining ring 402 fixedly sleeved on the movable sleeve 401, and an umbrella-shaped rubber plug 403 movably sleeved on the movable sleeve 401. The umbrella-shaped rubber plug 403 is located on one side of the retaining ring 402 and contacts the inner wall of the through hole 3 to block the through hole 3. By adjusting the movable sleeve 401 to move it, the retaining ring 402 and the umbrella-shaped rubber plug 403 can be moved, causing the umbrella-shaped rubber plug 403 to disengage from the inner wall of the through hole 3. At this time, the through hole 3 can be opened, allowing CO2 gas to flow through the pressure reducing pipe 1 and the through hole 3.

[0057] Example 2:

[0058] Based on Example 1, in order to facilitate precise adjustment of the pressure of CO2 gas flowing in the pressure reducing pipe 1, an adjustment structure for controlling the opening and closing of the sealing structure is arranged on the sealing structure.

[0059] The adjustment structure includes an L-shaped bracket 5 arranged on one side of the connecting seat 4, a worm gear 501 rotatably mounted on the connecting seat 4 and the L-shaped bracket 5, a threaded hole 502 opened inside the worm gear 501, the worm gear 501 being threadedly sleeved on the movable sleeve rod 401 through the threaded hole 502, the surface of the movable sleeve rod 401 being provided with a thread adapted to the threaded hole 502, a drive assembly arranged on the worm gear 501 for driving the worm gear 501 to rotate, and a limiting assembly arranged on the worm gear 501 for limiting the position of the worm gear 501 when rotating. The drive assembly drives the worm gear 501 to rotate, and the rotating worm gear 501 can drive the movable sleeve rod 401 to move through the threaded engagement between the threaded hole 502 and the movable sleeve rod 401.

[0060] Specifically, the drive assembly includes a support frame 503 arranged on the connecting seat 4, a rotating shaft 504 rotatably installed inside the support frame 503, a worm 505 fixedly sleeved on the rotating shaft 504, the worm 505 meshing with the worm wheel 501, and a motor 506 arranged on one side of the support frame 503 for driving the rotating shaft 504 to rotate. The output end of the motor 506 is arranged at one end of the rotating shaft 504. When the motor 506 is turned on, it can drive the worm 505 to rotate through the rotating shaft 504, so that the rotating worm 505 drives the worm wheel 501 to rotate through meshing with the worm wheel 501.

[0061] Specifically, the limiting component includes two limiting rings 507 respectively arranged on one side of the connecting seat 4 and the L-shaped bracket 5. Both limiting rings 507 are rotatably installed inside the worm gear 501. When the worm gear 501 rotates, it can rotate on the limiting rings 507 on one side of the connecting seat 4 and the L-shaped bracket 5, thereby limiting the position of the worm gear 501 when it rotates and preventing it from deviating.

[0062] The adjustment structure also includes a guide assembly arranged on the movable sleeve 401 to limit the direction of movement of the movable sleeve 401.

[0063] Specifically, the guide assembly includes a guide frame 508 fixedly sleeved on the movable sleeve 401, a guide hole 509 opened inside the guide frame 508, and a guide rod 510 arranged on one side of the L-shaped bracket 5. The guide rod 510 is slidably installed inside the guide hole 509. The movable sleeve 401 can drive the guide frame 508 to move, so that the guide frame 508 can slide on the guide rod 510 through the guide hole 509, thereby restricting the movement direction of the movable sleeve 401.

[0064] Example 3:

[0065] Based on Example 2, in order to ensure that the umbrella-shaped rubber plug 403 can fit tightly against the inner wall of the through hole 3 when the pressure reducing tube 1 is closed, and to improve its sealing performance, a compression structure is arranged on the sealing structure to compress the sealing structure and maintain its sealing effect.

[0066] The extrusion structure includes an adjusting screw 6 and a cap 601 and a pressure plate 602 arranged at both ends of the adjusting screw 6. The pressure plate 602 is in contact with the umbrella-shaped rubber plug 403. A threaded hole 603 is opened inside the movable sleeve 401. The adjusting screw 6 is threadedly installed in the threaded hole 603. Rotating the cap 601 drives the adjusting screw 6 to rotate. The rotating adjusting screw 6 can move by engaging with the threaded hole 603, so that the moving adjusting screw 6 can drive the pressure plate 602 to extrude the umbrella-shaped rubber plug 403.

[0067] This utility model also provides a CO2 refrigeration system, including a CO2 refrigeration pressure reducing valve.

[0068] Working principle:

[0069] By activating the motor 506, the rotating shaft 504 can be driven to rotate inside the support frame 503. The rotating shaft 504 drives the worm gear 505 to rotate, which in turn drives the worm wheel 501 to rotate through meshing with it. The continuously rotating worm wheel 501 drives the movable sleeve 401 to move through the threaded hole 502 and the threaded engagement of the movable sleeve 401. This causes the movable sleeve 401 to move the retaining ring 402 and the umbrella-shaped rubber plug 403, disengaging the umbrella-shaped rubber plug 403 from its contact with the inner wall of the through hole 3. At this point, the through hole 3 can be opened, allowing CO2 gas to pass through the pressure reducing pipe 1 and the through hole 3. The flow is facilitated by adjusting the opening degree of the through hole 3 to reduce the pressure of the passing CO2 gas. A pressure gauge can be installed on the pressure reducing pipe 1 to check the gas pressure at both ends, so as to make precise adjustments according to the required pressure. When the valve is closed, if the umbrella-shaped rubber plug 403 is worn and causes poor contact between it and the inner wall of the through hole 3, the screw cap 601 can be rotated to drive the adjusting screw 6 to rotate. The rotating adjusting screw 6 can move through the thread engagement with the threaded hole 603, so that the moving adjusting screw 6 can drive the pressure plate 602 to move, so that the pressure plate 602 squeezes the umbrella-shaped rubber plug 403 and presses the umbrella-shaped rubber plug 403 into the through hole 3.

[0070] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A CO2 refrigeration pressure reducing valve, characterized in that, include: Pressure reducing tube (1); A baffle (2) is arranged inside the pressure reducing pipe (1) to block part of the CO2 gas flow; A through hole (3) is provided inside the baffle (2) for the flow of CO2 gas; A sealing structure is arranged inside the pressure reducing pipe (1) to seal the through hole (3). An adjustment structure, arranged on the sealing structure, is used to control the movement and opening / closing of the sealing structure; An extrusion structure, arranged on a sealing structure, is used to compress the sealing structure and maintain its sealing effect.

2. The CO2 refrigeration pressure reducing valve as described in claim 1, characterized in that, The sealing structure includes: Connector (4) is arranged on the outer surface of pressure reducing pipe (1); The movable sleeve (401) is slidably installed inside the connecting seat (4) and the pressure reducing pipe (1); The retaining ring (402) is fixedly sleeved on the movable sleeve rod (401); An umbrella-shaped rubber plug (403) is movably sleeved on a movable sleeve rod (401), and the umbrella-shaped rubber plug (403) is located on one side of the retaining ring (402); The umbrella-shaped rubber plug (403) is in contact with the inner wall of the through hole (3) and is used to seal the through hole (3).

3. A CO2 refrigeration pressure reducing valve as described in claim 1, characterized in that, The adjustment structure includes: L-shaped bracket (5) is arranged on one side of connector (4); The worm gear (501) is rotatably mounted on the connecting seat (4) and the L-shaped bracket (5); The threaded hole (502) is located inside the worm gear (501); The worm gear (501) is threaded onto the movable sleeve (401) through the threaded hole (502), and the surface of the movable sleeve (401) is provided with a thread that matches the threaded hole (502). A drive assembly is arranged on the worm gear (501) for driving the worm gear (501) to rotate; A limiting component is arranged on the worm gear (501) to limit the position of the worm gear (501) when it rotates.

4. A CO2 refrigeration pressure reducing valve as described in claim 3, characterized in that, The driving component includes: The support frame (503) is arranged on the connecting seat (4); The rotating shaft (504) is rotatably mounted inside the support frame (503); The worm (505) is fixedly sleeved on the rotating shaft (504), and the worm (505) meshes with the worm wheel (501); The motor (506) is arranged on one side of the support frame (503), and the output end of the motor (506) is arranged at one end of the rotating shaft (504) to drive the rotating shaft (504) to rotate.

5. A CO2 refrigeration pressure reducing valve as described in claim 3, characterized in that, The limiting assembly includes two limiting rings (507), which are respectively arranged on one side of the connecting seat (4) and the L-shaped bracket (5). Both limiting rings (507) are rotatably installed inside the worm gear (501).

6. A CO2 refrigeration pressure reducing valve as described in claim 1, characterized in that, The adjustment structure also includes a guide assembly arranged on the movable sleeve (401) to limit the direction of movement of the movable sleeve (401).

7. A CO2 refrigeration pressure reducing valve as described in claim 6, characterized in that, The guiding component includes: The guide frame (508) is fixedly sleeved on the movable sleeve rod (401); A guide hole (509) is formed inside the guide frame (508); The guide rod (510) is arranged on one side of the L-shaped bracket (5) and is slidably installed inside the guide hole (509).

8. A CO2 refrigeration pressure reducing valve as described in claim 1, characterized in that, The extrusion structure includes: Adjusting screw (6); The screw cap (601) and the pressure plate (602) are respectively arranged at both ends of the adjusting screw (6), and the pressure plate (602) is in contact with the umbrella-shaped rubber plug (403); The threaded hole (603) is opened inside the movable sleeve (401), and the adjusting screw (6) is threaded into the threaded hole (603).

9. A CO2 refrigeration system, characterized in that, The CO2 refrigeration pressure reducing valve includes any one of claims 1-8.

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