Anti-burst automobile air conditioner expansion valve

Abstract

The utility model discloses an anti-burst automobile air conditioner expansion valve which comprises a valve body, the valve body comprises a side valve port, an inlet and a lower valve port, a capillary tube is installed at the top end of the valve body, the other end of the capillary tube is fixedly connected with a temperature sensing bag, a valve element structure is installed in the valve body, and the valve element structure comprises a moving rod, a top ball, a top plate and a buffer spring. The inner side wall of the lower valve port is provided with an empty groove which is sunken outwards in the radial direction, the upper end and the lower end of the buffer spring are fixedly connected with the top plate and the lower side wall of the empty groove correspondingly, and a drying plate used for drying refrigerants is fixed to the side wall of the empty groove. According to the expansion valve, the drying plate is installed in the expansion valve body to absorb moisture generated in the valve body, so that the moisture in a refrigerant is reduced, the possibility that the refrigerant is frozen at the expansion valve is reduced, the convex edges are arranged on the surface of the drying plate, the contact area between the drying plate and the refrigerant is increased, and the water absorption efficiency of the drying plate is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve bodies, and more specifically, to an explosion-proof automotive air conditioning expansion valve. Background Technology

[0002] The expansion valve in a car's air conditioning system plays a crucial role. The expansion valve throttles the refrigerant through its orifice, causing the high-temperature, high-pressure liquid refrigerant to decrease in both pressure and temperature after passing through the expansion valve, transforming it into a low-temperature, low-pressure mist-like hydraulic refrigerant. The refrigerant with reduced pressure after throttling can better absorb heat in the evaporator, thereby achieving the cooling and refrigeration of the air inside the car.

[0003] If the refrigerant in the air conditioning system has a high water content, the water may freeze at the expansion valve as the refrigerant circulates. This is because the freezing point of water is much higher than that of the refrigerant, so it is easier for water to condense into ice at the expansion valve. Ice formation at the expansion valve will hinder the normal flow of the refrigerant, and ice formation inside the expansion valve will also cause the valve body to increase in volume, leading to the valve body bursting during the expansion process.

[0004] Therefore, a new technical solution is needed to address the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an explosion-proof automotive air conditioning expansion valve.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an explosion-proof automotive air conditioning expansion valve, comprising a valve body, the valve body including a side valve port, an inlet and a lower valve port, a capillary tube installed at the top of the valve body, a temperature sensing bulb fixedly connected to the other end of the capillary tube, a valve core structure installed inside the valve body, the valve core structure including a moving rod, a top ball, a top plate and a buffer spring, the lower end of the moving rod being fixedly connected to the top ball, a radially outward recessed groove being formed on the inner side wall of the lower valve port, the upper and lower ends of the buffer spring being fixedly connected to the top plate and the lower side wall of the groove respectively, and a drying plate for drying refrigerant being fixed on the side wall of the groove.

[0007] Preferably, a number of protruding ridges are fixed on the side of the drying plate facing the lower valve port axis.

[0008] Preferably, the drying plate has two through slots on the side away from the axis of the lower valve port, the through slots are parallel to the axis of the lower valve port, and the side wall of the empty slot is fixed with a protrusion corresponding to the through slot.

[0009] Preferably, the top surface of the top plate has a spherical groove.

[0010] Preferably, a sensing diaphragm is fixed to the upper end of the valve body, and the upper end of the moving rod is fixed to the sensing diaphragm at the upper end of the valve body.

[0011] In summary, this utility model has the following beneficial effects: by installing a drying plate inside the expansion valve body to absorb the moisture generated inside the valve body, the moisture in the refrigerant is reduced, thereby reducing the possibility of it freezing at the expansion valve. The several protruding ridges set on the surface of the drying plate increase the contact area between the drying plate and the refrigerant, thereby improving the water absorption efficiency of the drying plate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the drying plate of this utility model.

[0015] In the diagram: 1. Valve body; 11. Side valve port; 12. Inlet; 13. Lower valve port; 2. Capillary tube; 21. Temperature sensing bulb; 3. Moving rod; 31. Top ball; 32. Top plate; 33. Buffer spring; 4. Drying plate; 41. Raised ridge; 42. Through groove. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0017] An explosion-proof automotive air conditioning expansion valve, such as Figure 1 , Figure 2 As shown, the valve body 1 includes a side valve port 11, an inlet 12, and a lower valve port 13. A capillary tube 2 is installed at the top of the valve body 1, and a temperature sensing bulb 21 is fixedly connected to the other end of the capillary tube 2. A valve core structure is installed inside the valve body 1. The valve core structure includes a moving rod 3, a top ball 31, a top plate 32, and a buffer spring 33. The lower end of the moving rod 3 is fixedly connected to the top ball 31. A radially outward recessed groove is opened on the inner side wall of the lower valve port 13. The upper and lower ends of the buffer spring 33 are fixedly connected to the top plate 32 and the lower side wall of the groove, respectively. A sealing block for adjusting the flow rate of the lower valve port 13 is fixed on the lower end face of the top plate 32. A drying plate 4 for drying the refrigerant is fixed on the side wall of the groove. The drying plate 4 is made of calcium chloride.

[0018] Several protruding ridges 41 are fixed on one side of the drying plate 4 facing the axis of the lower valve port 13.

[0019] Two through slots 42 are provided on the side of the drying plate 4 away from the axis of the lower valve port 13. The through slots 42 are parallel to the axis of the lower valve port 13. A protrusion corresponding to the through slot 42 is fixed on the side wall of the slot.

[0020] The top surface of the top plate 32 has a spherical groove.

[0021] A sensing diaphragm is fixed to the upper end of the valve body 1. The upper end of the moving rod 3 is fixed to the sensing diaphragm at the upper end of the valve body 1. The temperature sensing bulb 21 senses the temperature and changes the curvature of the sensing diaphragm through the capillary tube 2 inside it, thereby causing the moving rod 3 to move down or up, thereby changing the position of the top plate 32, and then driving the sealing block to move up and down, thereby adjusting the flow rate of refrigerant through the lower valve port 13.

[0022] In use, the refrigerant enters through inlet 12 and exits through lower valve port 13. During the process of the refrigerant passing through lower valve port 13, it comes into contact with drying plate 4. Drying plate 4 absorbs the moisture in the refrigerant, thereby reducing the moisture content in the refrigerant and preventing the moisture in the refrigerant from freezing at lower valve port 13.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An explosion-proof automotive air conditioning expansion valve, comprising a valve body (1), characterized in that: The valve body (1) includes a side valve port (11), an inlet (12) and a lower valve port (13). A capillary tube (2) is installed at the top of the valve body (1). A temperature sensing bulb (21) is fixedly connected to the other end of the capillary tube (2). A valve core structure is installed inside the valve body (1). The valve core structure includes a moving rod (3), a top ball (31), a top plate (32) and a buffer spring (33). The lower end of the moving rod (3) is fixedly connected to the top ball (31). A groove is provided on the inner side wall of the lower valve port (13) that is recessed radially outward. The upper and lower ends of the buffer spring (33) are fixedly connected to the top plate (32) and the lower side wall of the groove, respectively. A drying plate (4) for drying the refrigerant is fixed on the side wall of the groove.

2. A burst-proof automotive air conditioning expansion valve according to claim 1, characterized in that: The drying plate (4) has several protruding ridges (41) fixed on one side facing the lower valve port (13) axis.

3. A rupture-proof automotive air conditioning expansion valve according to claim 1, characterized in that: The drying plate (4) has two through slots (42) on the side away from the axis of the lower valve port (13). The through slots (42) are parallel to the axis of the lower valve port (13). The side wall of the slot is fixed with a protrusion corresponding to the through slot (42).

4. The anti-burst automotive air conditioning expansion valve of claim 1 wherein: The top surface of the top plate (32) is provided with a spherical groove.

5. The explosion-proof automotive air conditioning expansion valve according to claim 1, characterized in that: The upper end of the valve body (1) is fixed with a sensing film, and the upper end of the moving rod (3) is fixed on the sensing film at the upper end of the valve body (1).

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