Control valve core for automotive air conditioning system

Abstract

This utility model relates to the field of control valve core technology, specifically a control valve core for automotive air conditioning systems. It includes a valve core body, a valve core rod slidably connected to the valve core body, a spring sleeved on the valve core rod, a stop block fixedly connected to the end of the valve core rod away from the valve core body, a rubber ring sleeved on the bottom side wall of the valve core body, and a metal sealing ring threadedly installed at the end of the valve core body. A retaining ring is fixedly connected to the metal sealing ring, and a sealing ring is engaged on the retaining ring. The rubber ring achieves initial sealing through elasticity, while the metal sealing ring, due to its wear resistance and high-pressure resistance, maintains a seal even after the rubber ring wears down. The sealing ring tightly covers the end of the metal sealing ring, further blocking possible leakage paths and significantly reducing the risk of refrigerant leakage.

Description

Technical Field

[0001] This utility model relates to control valve cores, specifically control valve cores for automotive air conditioning systems, and belongs to the field of control valve core technology. Background Technology

[0002] In automotive air conditioning systems, the electronic expansion valve core is controlled by a stepper motor or electromagnetic driver. The air conditioning control system receives signals from in-vehicle temperature sensors, evaporator temperature sensors, etc., calculates the required refrigerant flow, and sends a command to the electronic expansion valve control unit. The control unit drives the stepper motor or electromagnetic driver, which in turn moves the valve core through a transmission mechanism, changing the valve opening and thus precisely regulating the refrigerant flow.

[0003] However, during long-term use, the rubber sealing ring installed on the valve core is prone to wear. Wear of the sealing ring can easily lead to refrigerant leakage. Refrigerant is the core medium for heat exchange in the air conditioning system. After leakage, there is not enough refrigerant in the system, and it cannot fully vaporize and absorb heat in the evaporator. This will result in a slower cooling speed inside the vehicle, a weakened cooling effect, or even a complete loss of cooling function, affecting driving and riding comfort. Utility Model Content

[0004] The purpose of this invention is to provide a control valve core for an automotive air conditioning system to solve the above-mentioned problems. The rubber ring achieves initial sealing through elasticity, and the metal sealing ring maintains the seal even after the rubber ring wears due to its wear resistance and high pressure resistance. The sealing ring tightly covers the end of the metal sealing ring, further blocking possible leakage paths and significantly reducing the risk of refrigerant leakage.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a control valve core for an automotive air conditioning system, comprising a valve core body, a valve core rod slidably connected to the valve core body, a spring sleeved on the valve core rod, a stop block fixedly connected to the end of the valve core rod away from the valve core body, a rubber ring sleeved on the bottom side wall of the valve core body, a metal sealing ring threadedly installed at the end of the valve core body, a retaining ring fixedly connected to the metal sealing ring, and a sealing ring engaged on the retaining ring.

[0006] Preferably, the diameter of the spring is larger than the diameter of the valve core rod, and the two ends of the spring abut against the stop block and the valve core body, respectively.

[0007] Preferably, a convex ring is fixedly connected to the end of the rubber ring away from the metal sealing ring, and the convex ring is engaged with the valve core body.

[0008] Preferably, the valve core body has a groove inside, and the part of the valve core body near the groove has an arc-shaped structure.

[0009] Preferably, the convex ring is located in the groove, and the top end of the convex ring is arranged in an arc shape, and the width of the convex ring is equal to the width of the groove.

[0010] Preferably, the bottom of the rubber ring that contacts the valve core body is provided with a sloping structure, and the metal sealing ring contacts the inner wall of the bottom end of the rubber ring.

[0011] Preferably, the sealing ring and the metal sealing ring are engaged, and the bottom end of the sealing ring is provided with a groove.

[0012] Preferably, the retaining ring is located in the retaining groove, and the part of the retaining ring that contacts the sealing ring has an inclined structure.

[0013] The beneficial effects of this utility model are as follows: the rubber ring adheres to the inner wall of the metal sealing ring through its bottom bevel. When the metal sealing ring is tightened by the thread, it applies continuous pressure to the rubber ring, causing the rubber ring to elastically deform and tightly adhere to the valve core body. The flexibility of the rubber fills the tiny gaps, forming the first elastic seal. The metal sealing ring itself, as a rigid component, is threadedly connected to the valve core body to form the second rigid seal. Even if the rubber ring wears out over a long period of time, the metal sealing ring can still maintain the seal due to its wear resistance and high pressure resistance. This double protection significantly reduces the risk of refrigerant leakage. The sealing ring engages with the beveled retaining ring installed on the metal sealing ring, allowing the sealing ring to tightly cover the end of the metal sealing ring, further blocking possible leakage paths and forming a third-level seal supplement. This facilitates adaptation to the complex operating conditions of pressure fluctuations in automotive air conditioning systems. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure between the valve core body and the valve core rod of this utility model;

[0016] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A.

[0017] Figure 4 This is a schematic diagram of the connection structure between the sealing ring and the metal sealing ring of this utility model;

[0018] Figure 5 for Figure 4 The diagram shown is an enlarged view of the structure of section B.

[0019] Figure 6 This is a schematic diagram of the connection structure between the valve core rod and the spring of this utility model;

[0020] Figure 7 for Figure 6 The diagram shows an enlarged view of section C.

[0021] Figure 8 for Figure 6 The diagram shows an enlarged view of the structure of part D.

[0022] In the diagram: 1. Valve core body; 2. Valve core rod; 3. Spring; 4. Stop block; 5. Rubber ring; 6. Sealing ring; 7. Metal sealing ring; 8. Raised ring; 9. Groove; 10. Snap ring; 11. Snap groove. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-8 As shown, a control valve core for an automotive air conditioning system includes a valve core body 1, a valve core rod 2 slidably connected to the valve core body 1, a spring 3 sleeved on the valve core rod 2, a stop block 4 fixedly connected to the end of the valve core rod 2 away from the valve core body 1, the valve core rod 2 passing through the through hole of the valve core body 1, so that the valve core rod 2 and the valve core body 1 form a sliding connection, the spring 3 sleeved on the valve core rod 2, one end of the spring 3 abutting against the valve core body 1, the other end abutting against the stop block 4 at the end of the valve core rod 2, ensuring that the spring 3 is in a pre-compressed state, providing a restoring force for the valve core rod 2, a rubber ring 5 sleeved on the bottom side wall of the valve core body 1, a metal sealing ring 7 threadedly installed at the end of the valve core body 1, a retaining ring 10 fixedly connected to the metal sealing ring 7, and a sealing ring 6 engaged on the retaining ring 10.

[0025] As a technical optimization of this utility model, the diameter of the spring 3 is larger than the diameter of the valve core rod 2, and the two ends of the spring 3 respectively abut against the stop block 4 and the valve core body 1, driving the valve core rod 2 to move axially along the valve core body 1. Observe whether the spring 3 can drive the valve core rod 2 to accurately reset, ensuring smooth adjustment of the valve opening.

[0026] As a technical optimization of this utility model, a convex ring 8 is fixedly connected to one end of the rubber ring 5 away from the metal sealing ring 7. The convex ring 8 is engaged with the valve core body 1. The valve core body 1 has a groove 9 inside. The part of the valve core body 1 near the groove 9 is set with an arc surface structure. The convex ring 8 on the rubber ring 5 is precisely engaged in the groove 9 of the valve core body 1. The width of the convex ring 8 is equal to the width of the groove 9. The arc surface structure fits snugly, which can effectively prevent the rubber ring 5 from shifting axially or radially. The convex ring 8 is located in the groove 9, and the top of the convex ring 8 is set with an arc surface structure. The width of the convex ring 8 is equal to the width of the groove 9.

[0027] As a technical optimization of this utility model, the bottom of the rubber ring 5 that contacts the valve core body 1 is set with a sloping structure, and the metal sealing ring 7 contacts the inner wall of the bottom end of the rubber ring 5. The metal sealing ring 7 is screwed onto the end of the valve core body 1 by threads, so that the inner wall of the metal sealing ring 7 is tightly fitted with the sloping bottom of the rubber ring 5. The thread pre-tightening force causes the rubber ring 5 to elastically deform, thereby enhancing the initial sealing effect.

[0028] As a technical optimization of this utility model, the sealing ring 6 and the metal sealing ring 7 are engaged and connected. The bottom end of the sealing ring 6 is provided with a groove 11, and the retaining ring 10 is located in the groove 11. The groove 11 of the sealing ring 6 is aligned with the retaining ring 10 installed on the metal sealing ring 7. The retaining ring 10 is tightly engaged with the groove 11 by using the guiding effect of the inclined surface, thereby completing the assembly of the sealing component. The part of the retaining ring 10 that contacts the sealing ring 6 is set with an inclined structure.

[0029] In use, this invention first inserts the valve core rod 2 through the through hole of the valve core body 1, forming a sliding connection between the valve core rod 2 and the valve core body 1. A spring 3 is fitted onto the valve core rod 2, with one end of the spring 3 abutting against the valve core body 1 and the other end abutting against the stop block 4 at the end of the valve core rod 2, ensuring that the spring 3 is in a pre-compressed state to provide a restoring force for the valve core rod 2. Next, the rubber ring 5 is fitted onto the bottom side wall of the valve core body 1, ensuring that the convex ring 8 on the rubber ring 5 is precisely engaged with the groove 9 of the valve core body 1. The width of the convex ring 8 is equal to the width of the groove 9, and the arc surface structure fits snugly, effectively preventing the rubber ring 5 from shifting axially or radially. The groove 11 of the sealing ring 6 is aligned with the retaining ring 10 installed on the metal sealing ring 7. The inclined plane guides the retaining ring 10 to engage tightly with the retaining groove 11, thus completing the assembly of the sealing component. Finally, the metal sealing ring 7 is screwed onto the end of the valve core body 1, ensuring a tight fit between the inner wall of the metal sealing ring 7 and the bottom of the inclined plane of the rubber ring 5. The thread preload causes the rubber ring 5 to elastically deform, enhancing the initial sealing effect. The rubber ring 5 adheres to the inner wall of the metal sealing ring 7 via its bottom inclined plane. As the metal sealing ring 7 is screwed on, continuous pressure is applied to the rubber ring 5, causing it to elastically deform and tightly adhere to the valve core body 1. The flexibility of the rubber fills tiny gaps, forming the first elastic seal. The metal sealing ring 7 itself acts as a rigid component, closely fitting the valve core body. 1. The threaded connection forms a second rigid seal. Even if the rubber ring 5 wears out over a long period, the metal sealing ring 7 can still maintain the seal due to its wear resistance and high pressure resistance. This double protection significantly reduces the risk of refrigerant leakage. 2. The sealing ring 6 engages with the retaining ring 10 installed on the metal sealing ring 7, ensuring that the sealing ring 6 tightly covers the end of the metal sealing ring 7, further blocking possible leakage paths and forming a third-level seal supplement. This facilitates adaptation to the complex operating conditions of pressure fluctuations in automotive air conditioning systems. After assembling the valve core, connect the external drive mechanism and test the sliding flexibility of the valve core rod 2: drive the valve core rod 2 to move axially along the valve core body 1 and observe whether the spring 3 can drive the valve core rod 2 to accurately reset, ensuring the valve opening adjustment. Smooth operation; introduce test pressure into the valve core body 1 to simulate the refrigerant working pressure, observe whether there is leakage at the mating parts of the rubber ring 5, metal sealing ring 7 and sealing ring 6, and confirm that the sealing structure is effective; after being integrated into the automotive air conditioning system, the air conditioning control system drives the valve core rod 2 to slide according to the signals from the in-vehicle temperature sensor and the evaporator temperature sensor. The valve core rod 2 drives the valve port component to change the opening degree and adjust the refrigerant flow; if refrigerant leakage is found, the metal sealing ring 7 can be disassembled, and the worn sealing ring 6 can be replaced separately through the separation structure of the groove 11 and the retaining ring 10. If the rubber ring 5 is aged, it can be removed and replaced with a new rubber ring 5, and the convex ring 8 and the groove 9 can be re-engaged. There is no need to replace the entire valve core.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A control valve spool for use in an automotive air conditioning system, comprising a spool body (1), characterised in that: A valve core rod (2) is slidably connected to the valve core body (1). A spring (3) is sleeved on the valve core rod (2). A stop block (4) is fixedly connected to the end of the valve core rod (2) away from the valve core body (1). A rubber ring (5) is sleeved on the bottom side wall of the valve core body (1). A metal sealing ring (7) is threaded on the end of the valve core body (1). A retaining ring (10) is fixedly connected to the metal sealing ring (7). A sealing ring (6) is engaged on the retaining ring (10).

2. The control valve core for an automotive air conditioning system according to claim 1, characterized in that: The diameter of the spring (3) is larger than the diameter of the valve core rod (2), and the two ends of the spring (3) abut against the stop block (4) and the valve core body (1) respectively.

3. The control valve core for an automotive air conditioning system according to claim 1, characterized in that: The rubber ring (5) is fixedly connected to a protruding ring (8) at one end away from the metal sealing ring (7), and the protruding ring (8) is engaged with the valve core body (1).

4. The control valve core for an automotive air conditioning system according to claim 1, characterized in that: The valve core body (1) has a groove (9) inside, and the part of the valve core body (1) near the groove (9) is arranged with an arc surface structure.

5. The control valve core for an automotive air conditioning system according to claim 3, characterized in that: The convex ring (8) is located in the groove (9), and the top of the convex ring (8) is arranged in an arc surface structure. The width of the convex ring (8) is equal to the width of the groove (9).

6. The control valve core for an automotive air conditioning system according to claim 1, characterized in that: The bottom of the rubber ring (5) that contacts the valve core body (1) is set with a sloping structure, and the metal sealing ring (7) contacts the inner wall of the bottom end of the rubber ring (5).

7. The control valve core for an automotive air conditioning system according to claim 1, characterized in that: The sealing ring (6) is engaged with the metal sealing ring (7), and the bottom end of the sealing ring (6) is provided with a groove (11).

8. The control valve core for an automotive air conditioning system according to claim 1, characterized in that: The retaining ring (10) is located in the retaining groove (11), and the part of the retaining ring (10) that contacts the sealing ring (6) is set with an inclined structure.

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