Refrigeration expansion valve

Abstract

The utility model discloses a refrigeration expansion valve which comprises an expansion valve body, a high-pressure connecting pipe is fixedly welded to the expansion valve body, a low-pressure connecting pipe is fixedly welded to the expansion valve body, a valve deck is installed at the top end of the expansion valve body, a capillary tube is arranged on the valve deck, and the capillary tube is provided with a capillary tube. A temperature sensing bag is installed at the end, away from the valve deck, of the capillary tube, a protective shell is arranged on the temperature sensing bag, an installation cavity is formed in the protective shell, the temperature sensing bag is arranged in the installation cavity, end covers are fixedly welded to the two ends of the protective shell correspondingly, and heat insulation pads are fixedly bonded to the inner walls of the installation cavity and the two end covers correspondingly. And an arc-shaped clamping plate is arranged on the protective shell. When the expansion valve is used, the thermal bulb can be comprehensively protected through the arranged protective shell, the influence of the external temperature on the thermal bulb can be isolated through the arranged heat insulation pad, and the problem that the pressure transmitted to the expansion valve has errors due to the fact that the external temperature has the temperature sensing influence on the thermal bulb is solved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically a refrigeration expansion valve. Background Technology

[0002] The expansion valve is an important component in a refrigeration system, typically installed between the liquid receiver and the evaporator. The expansion valve throttles the medium-temperature, high-pressure liquid refrigerant, transforming it into low-temperature, low-pressure wet vapor. The refrigerant then absorbs heat in the evaporator to achieve a cooling effect. The expansion valve controls the flow rate by monitoring changes in superheat at the evaporator's end, preventing underutilization of the evaporator area and knocking.

[0003] In existing expansion valve covers, the temperature sensing bulb located at the top of the cover directly contacts the evaporator outlet pipe to sense the temperature of the superheated steam at the evaporator outlet. Furthermore, the sensing bulb is directly exposed to the air during installation, so the external temperature affects its sensing effect, resulting in errors in the pressure transmitted to the valve body. To address these issues, we propose a refrigeration expansion valve. Utility Model Content

[0004] The purpose of this invention is to provide a refrigeration expansion valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a refrigeration expansion valve, comprising:

[0006] An expansion valve body is provided, on which a high-pressure connecting pipe is fixedly welded and a low-pressure connecting pipe is fixedly welded. A valve cover is installed at the top of the expansion valve body, and a capillary tube is provided on the valve cover. A temperature sensing bulb is installed at the end of the capillary tube away from the valve cover. A protective shell is provided on the temperature sensing bulb, and an installation cavity is provided on the protective shell. The temperature sensing bulb is placed in the installation cavity. End caps are fixedly welded to both ends of the protective shell. Heat insulation pads are fixedly adhered to the inner walls of the installation cavity and the two end caps. An arc-shaped clamp is provided on the protective shell.

[0007] Preferably, a fixing seat is fixedly bonded to both sides of the protective shell, and two through slots are opened on the fixing seat. A fixing rod is fixedly bonded to the through slot, and a moving rod is slidably connected to the fixing rod. A spring is sleeved on the fixing rod, and the two ends of the spring are fixedly connected to the outer wall of the protective shell and the moving rod, respectively. A snap-fit ​​block is fixedly bonded to the outer wall of the moving rod away from the fixing seat.

[0008] Preferably, two pairs of snap-fit ​​seats are fixedly welded to the arc-shaped clamp, and the snap-fit ​​seats are provided with slots, and the four moving rods are respectively inserted into the four slots.

[0009] Preferably, the top ends of the two movable rods located on one side are fixedly bonded to the same connecting rod.

[0010] Preferably, a silicone anti-slip pad is fixedly adhered to the side wall of the protective shell near the arc-shaped clamp.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] In use, this utility model provides comprehensive protection for the temperature sensing bulb through its protective shell and insulation pad, preventing external temperature from affecting the bulb and causing errors in the pressure transmitted to the expansion valve. During installation, simply place the protective shell on the outer wall of the evaporator outlet pipe, allowing the temperature sensing bulb to contact the outlet pipe through the opening in the protective shell. Then, clamp the arc-shaped clamp onto the outlet pipe and insert the four moving rods into the four slots. The elastic springs on the moving rods engage the locking blocks on the locking seats to lock the arc-shaped clamp. This facilitates the installation and removal of the temperature sensing bulb, and makes subsequent maintenance and repair convenient. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a refrigeration expansion valve proposed in this utility model;

[0014] Figure 2 This is an enlarged three-dimensional structural diagram of the connection between the protective shell and the arc-shaped clamp in a refrigeration expansion valve proposed in this utility model.

[0015] Figure 3 This is a top cross-sectional view of the connection between the protective shell and the temperature sensing bulb in a refrigeration expansion valve proposed in this utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the connection between the fixed seat and the moving rod in a refrigeration expansion valve proposed in this utility model.

[0017] In the diagram: 1. Expansion valve body; 2. High-pressure connecting pipe; 3. Low-pressure connecting pipe; 4. Valve cover; 5. Capillary tube; 6. Temperature sensing bulb; 7. Protective shell; 8. End cap; 9. End cap; 10. Heat insulation pad; 11. Fixing seat; 12. Through groove; 13. Fixing rod; 14. Moving rod; 15. Spring; 16. Snap-fit ​​block; 17. Snap-fit ​​seat; 18. Slot; 19. Connecting rod; 20. Silicone anti-slip pad; 21. Arc-shaped clamp. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-4 This utility model provides a technical solution: a refrigeration expansion valve, comprising:

[0020] An expansion valve body 1 is provided, on which a high-pressure connecting pipe 2 and a low-pressure connecting pipe 3 are fixedly welded. A valve cover 4 is installed at the top of the expansion valve body 1. A capillary tube 5 is provided on the valve cover 4, and heat-insulating tape is wrapped around the capillary tube 5. A temperature sensing bulb 6 is installed at the end of the capillary tube 5 away from the valve cover 4. A protective shell 7 is provided on the temperature sensing bulb 6. An installation cavity 8 is provided on the protective shell 7. The temperature sensing bulb 6 is placed in the installation cavity 8. End caps 9 are fixedly welded to both ends of the protective shell 7. Heat-insulating pads 10 are fixedly adhered to the inner walls of the installation cavity 8 and the two end caps 9. An arc-shaped clamping plate 21 is provided on the protective shell 7.

[0021] Fixed seats 11 are fixedly bonded to both sides of the protective shell 7. Two through slots 12 are opened on the fixed seats 11. Fixed rods 13 are fixedly bonded to the through slots 12. Moving rods 14 are slidably connected to the fixed rods 13. Elastic springs 15 are sleeved on the fixed rods 13. The two ends of the elastic springs 15 are fixedly connected to the outer wall of the protective shell 7 and the moving rods 14, respectively. A snap-fit ​​block 16 is fixedly bonded to the outer wall of the moving rod 14 away from the fixed seats 11.

[0022] Two pairs of snap-fit ​​seats 17 are fixedly welded onto the arc-shaped clamp 21. The snap-fit ​​seats 17 have slots 18. The four moving rods 14 are respectively inserted into the four slots 18. The moving rods 14 can be inserted into the four slots 18 and are locked by snapping with the snap-fit ​​seats 17 through the snap-fit ​​blocks 16.

[0023] The top ends of the two movable rods 14 located on one side are fixedly bonded to the same connecting rod 19. The connecting rod 19 facilitates the synchronous operation of the two movable rods 14 located on one side, improving the ease of operation.

[0024] A silicone anti-slip pad 20 is fixedly adhered to the side wall of the protective shell 7 near the arc-shaped clamp 21. The silicone anti-slip pad 20 can improve the anti-slip effect when the protective shell 7 is connected to the evaporator outlet pipe.

[0025] Working principle: In use, the protective shell 7 provides comprehensive protection for the temperature sensing bulb 6, and the heat insulation pad 10 isolates the temperature sensing bulb 6 from external temperature, preventing errors in the pressure transmitted to the expansion valve due to the influence of external temperature on the temperature sensing bulb 6. During installation, simply place the protective shell 7 on the outer wall of the evaporator outlet pipe, so that the temperature sensing bulb 6 contacts the evaporator outlet pipe through the opening of the protective shell 7. Then, clamp the arc-shaped clamp 21 onto the evaporator outlet pipe, and insert the four moving rods 14 into the four slots 18 respectively. The elastic spring 15 acts on the moving rods 14, causing the locking block 16 to engage with the locking seat 17 to lock the arc-shaped clamp 21. This facilitates the installation and removal of the temperature sensing bulb 6, and makes subsequent maintenance and repair convenient.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A refrigeration expansion valve, characterized in that, include: An expansion valve body (1) is provided with a high-pressure connecting pipe (2) and a low-pressure connecting pipe (3). A valve cover (4) is installed at the top of the expansion valve body (1). A capillary tube (5) is provided on the valve cover (4). A temperature sensing bulb (6) is installed at the end of the capillary tube (5) away from the valve cover (4). A protective shell (7) is provided on the temperature sensing bulb (6). An installation cavity (8) is provided on the protective shell (7). The temperature sensing bulb (6) is installed in the installation cavity (8). End caps (9) are fixedly welded to both ends of the protective shell (7). Heat insulation pads (10) are fixedly adhered to the inner walls of the installation cavity (8) and the two end caps (9). An arc-shaped clamp (21) is provided on the protective shell (7).

2. A refrigeration expansion valve according to claim 1, characterized in that: Fixed seats (11) are fixedly bonded to both sides of the protective shell (7). Two through slots (12) are opened on the fixed seats (11). Fixed rods (13) are fixedly bonded to the through slots (12). Moving rods (14) are slidably connected to the fixed rods (13). Elastic springs (15) are sleeved on the fixed rods (13). The two ends of the elastic springs (15) are fixedly connected to the outer wall of the protective shell (7) and the moving rods (14) respectively. A snap-fit ​​block (16) is fixedly bonded to the outer wall of the moving rods (14) away from the fixed seats (11).

3. A refrigeration expansion valve according to claim 2, characterized in that: Two pairs of snap-fit ​​seats (17) are fixedly welded onto the arc-shaped clamp (21). The snap-fit ​​seats (17) are provided with slots (18), and the four moving rods (14) are respectively inserted into the four slots (18).

4. A refrigeration expansion valve according to claim 2, characterized in that: The top ends of the two movable rods (14) located on one side are fixedly bonded to the same connecting rod (19).

5. A refrigeration expansion valve according to claim 1, characterized in that: A silicone anti-slip pad (20) is fixedly adhered to the side wall of the protective shell (7) near the arc-shaped clamp (21).

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