Vehicle electronic expansion valve and vehicle

Abstract

The utility model provides a vehicle electronic expansion valve and a vehicle, belongs to the technical field of vehicle parts, and comprises a screw module, the screw module is arranged to be of an integrally formed structure, the screw module comprises a screw part and a valve needle part, and the valve needle part and the screw part are integrally connected and coaxially arranged; the valve seat module comprises a fixed seat, a valve seat block and an elastic piece, the fixed seat is provided with a mounting hole, the valve seat block is provided with a circulation hole, the valve seat block is slidably mounted in the mounting hole, the elastic piece is mounted in the mounting hole, the valve seat block and the elastic piece are connected to form a floating structure, and the valve needle part and the circulation hole are coaxially arranged; the floating ball valve has the advantages that the valve seat block is designed to be of a floatable structure, the elastic piece can provide sealing pressure for the valve seat block, on the basis, the valve needle and the threaded rod can be designed to be of an integrated structure, the machining steps of welding and assembling are omitted, the machining difficulty is greatly reduced, and the coaxiality of the valve needle and the valve seat can be better guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and relates to an automotive electronic expansion valve and a vehicle. Background Technology

[0002] An electronic expansion valve is a key component in vehicle air conditioning and refrigeration systems. It is primarily used to precisely control the refrigerant flow into the evaporator, thereby controlling the cooling capacity and energy efficiency ratio of the vehicle's air conditioning system. The basic working principle of the electronic expansion valve is as follows: a magnetic rotor in the actuator drives a screw to rotate. The screw moves axially under the action of the threaded structure of the valve core, which in turn drives the valve needle to move axially, thus adjusting the flow area between the valve needle and the valve seat.

[0003] Unlike the electronic expansion valves in residential air conditioning systems, automotive electronic expansion valves operate under more complex conditions. Vehicles inevitably vibrate due to varying road conditions during driving, and this vibration causes the electronic expansion valve to vibrate. To cope with this complex working environment, a certain sealing pressure needs to be applied between the valve needle and valve seat in automotive electronic expansion valves during sealing to prevent refrigerant leakage.

[0004] For the reasons mentioned above, in existing automotive electronic expansion valves, a valve needle that can float axially is usually installed at the end of the screw. A spring is set between the valve needle and the screw to provide sealing pressure for the valve needle. However, this structure is difficult to manufacture, the valve needle needs to be welded to the screw, and the machining accuracy is not ideal, making it difficult to ensure the coaxiality of the valve needle and the valve seat. Therefore, there is room for improvement. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing an electronic expansion valve for vehicles and a vehicle thereof.

[0006] The objective of this utility model can be achieved through the following technical solution: A vehicle electronic expansion valve, comprising:

[0007] A screw module, wherein the screw module is configured as an integrally formed structure, the screw module includes a screw part and a valve needle part, the valve needle part is integrally connected to the screw part and the two are coaxially arranged;

[0008] A valve seat module includes a fixed seat, a valve seat block, and an elastic element. The fixed seat is provided with a mounting hole, and the valve seat block is provided with a flow hole. The valve seat block is slidably mounted in the mounting hole, and the elastic element is mounted in the mounting hole. The valve seat block and the elastic element are connected to form a floating structure, and the valve needle portion is coaxially arranged with the flow hole.

[0009] The screw module is configured as a moving part capable of actively moving relative to the valve seat module. The travel position of the valve needle relative to the valve seat block includes a contact position and a limit position, and a closing interval is formed between the contact position and the limit position. When the valve needle is in any position within the closing interval, the valve needle abuts against the valve seat block and seals the flow hole. The elastic element is in a compressed state and applies a sealing pressure to the valve seat block to make it tightly adhere to the valve needle.

[0010] Preferably, a spring seat is installed in the mounting hole, the spring seat is fixedly connected to the fixed seat, one end of the elastic element is in contact with the spring seat and the other end is in contact with the valve seat block.

[0011] Preferably, the mounting hole is configured as a stepped hole structure, with the smaller hole portion of the mounting hole facing the valve needle portion, and the elastic element and the valve seat block both mounted on the larger hole portion of the mounting hole; when the elastic element is in a compressed state, the elastic element applies a sealing pressure to the valve seat block towards the smaller hole portion of the mounting hole.

[0012] Preferably, a first sealing ring is fitted on the outer peripheral surface of the valve seat block, and the first sealing ring seals the gap between the valve seat block and the mounting hole.

[0013] Preferably, in the valve needle portion and the valve seat block, one is a rigid component and the other is an elastic component. The hardness of the rigid component is greater than that of the elastic component. When the valve needle portion and the valve seat block are pressed together, the elastic component fits tightly with the rigid component through its own elastic deformation characteristics, thereby forming an elastic sealing structure.

[0014] Preferably, the flexible rigid component is made of bronze, brass, plastic, or rubber.

[0015] Preferably, the travel position of the valve needle relative to the valve seat block also includes a fully open position, and an adjustment range is formed between the fully open position and the contact position; when the valve needle is located in the adjustment range, the tip of the valve needle passes through the flow hole, and there is a gap between the valve needle and the flow hole, and the travel position of the valve needle in the adjustment range determines the effective flow area of ​​the flow hole.

[0016] Preferably, the valve body is further included, wherein a valve cavity is provided within the valve body, the screw portion is connected to the valve body, the valve needle portion is movably disposed within the valve cavity, the fixed seat is connected to the outlet end of the valve cavity, and the flow hole is configured as the outlet of the valve cavity.

[0017] Preferably, the elastic element is a spring.

[0018] A vehicle including the aforementioned electronic expansion valve.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. The valve seat block is designed as a floating structure, and the elastic element can provide sealing pressure for the valve seat block. Based on this, the valve needle and screw can be designed as an integral structure, eliminating the processing steps of welding and assembly, greatly reducing the processing difficulty, and also better ensuring the coaxiality of the valve needle and valve seat.

[0021] 2. The mounting hole is designed as a stepped hole, meaning it has sections with different diameters. The smaller section faces the valve needle, while the larger section accommodates the elastic element (spring) and the valve seat block. A spring seat is installed at the end of the larger section of the mounting hole, preventing the valve seat block from sliding out from that end. The transition between the larger and smaller sections of the mounting hole forms a stepped surface, which blocks the valve seat block, ensuring it cannot slide out from the smaller section and that the valve seat block can only float within the limited stroke range of the mounting hole.

[0022] 3. The valve needle and valve seat block can be made of two different materials with different hardness, one with high hardness and the other with low hardness. When these two materials with different hardness are fitted together to seal (i.e., the valve needle seals the flow hole), they can form a sealing structure similar to a soft seal. That is, the one with lower hardness undergoes elastic deformation and fits tightly together with the one with higher hardness, thereby improving the sealing effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the valve needle of the vehicle electronic expansion valve of this utility model in the contact position.

[0024] Figure 2 This is a schematic diagram of the valve needle of the automotive electronic expansion valve of this utility model when it is in the extreme position.

[0025] Figure 3 This is a structural schematic diagram of the screw module and valve seat module of this utility model.

[0026] In the figure, 100 is the screw part; 200 is the valve needle part; 300 is the fixed seat; 310 is the mounting hole; 320 is the spring seat; 400 is the valve seat block; 410 is the flow hole; 420 is the first sealing ring; 500 is the elastic element; 600 is the valve body; and 610 is the valve cavity. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figures 1 to 3As shown, an automotive electronic expansion valve includes: a screw module, which is an integrally formed structure, comprising a screw portion 100 and a valve needle portion 200, the valve needle portion 200 being integrally connected to the screw portion 100 and coaxially arranged; and a valve seat module, comprising a fixed seat 300, a valve seat block 400, and an elastic element 500, the fixed seat 300 having a mounting hole 310, the valve seat block 400 having a flow hole 410, the valve seat block 400 being slidably mounted in the mounting hole 310, the elastic element 500 being mounted in the mounting hole 310, and the valve seat block 400 being slidably mounted in the mounting hole 310. The elastic element 500 is connected to form a floating structure, and the valve needle 200 is coaxially arranged with the flow hole 410. The screw module is configured as a moving part that can actively move relative to the valve seat module. The stroke position of the valve needle 200 relative to the valve seat block 400 includes a contact position and a limit position, and a closing interval is formed between the contact position and the limit position. When the valve needle 200 is in any position within the closing interval, the valve needle 200 presses against the valve seat block 400 and seals the flow hole 410. The elastic element 500 is in a compressed state and applies a sealing pressure to the valve seat block 400 to make it press tightly against the valve needle 200.

[0029] When the electronic expansion valve is in the closed state, a sealing pressure needs to be applied between the valve needle and the valve seat to ensure reliable sealing. Therefore, in existing designs, a spring is placed between the valve needle and the screw, creating a floating structure to provide the sealing pressure. However, this design presents manufacturing difficulties. Therefore, in this solution, the elastic element 500 is cleverly designed into the valve seat module. The sealing pressure is provided by the floating valve seat block 400, allowing the valve needle 200 (valve needle) to form an integral structure with the screw 100 (screw). This significantly reduces manufacturing difficulty and easily ensures the coaxiality of the valve needle 200 and the valve seat block 400.

[0030] Furthermore, the mounting hole 310 within the fixed base 300 is used to mount the elastic element 500 and the valve seat block 400. The valve seat block 400 can slide within the mounting hole 310. The elastic element 500 is preferably a spring. The valve seat block 400, in conjunction with the elastic element 500, can form a floating structure, meaning that the valve seat block 400 can adapt to a certain displacement. When the valve seat block 400 is pressed by the valve needle portion 200, the elastic element 500 stores force and deforms, thereby providing a sealing pressure to the valve seat portion, making it tightly adhere to the valve needle portion 200. The flow hole 410 within the valve seat block 400 allows refrigerant to flow through. The tip of the valve needle portion 200 can be inserted into the flow hole 410, thereby changing the effective flow area of ​​the flow hole 410 and thus regulating the refrigerant flow rate.

[0031] The screw module can move relative to the valve seat module. When the screw part 100 moves, it drives the valve needle part 200 to move together, changing its position relative to the valve seat block 400. The valve needle part 200 can reach the contact position and the limit position. The contact position is the critical position where the valve needle part 200 contacts the valve seat block 400 and the elastic element 500 does not deform. The limit position is the position where the valve needle part 200 pushes the valve seat block 400 to the maximum deformation degree of the elastic element 500.

[0032] When the valve needle 200 is in any position within the closed range, it abuts against the valve seat block 400 and seals the flow orifice, indicating that the expansion valve is completely closed and the refrigerant flow is completely stopped. Because the valve seat block 400 has been displaced, the elastic element 500 is in a compressed state and continuously applies sealing pressure to the valve seat block 400, keeping it tightly against the valve needle 200 and ensuring good sealing performance.

[0033] In this design, the valve seat block 400 forms a floating structure via the elastic element 500, and the continuous pressure provided by the elastic element 500 ensures reliable sealing. By designing the valve needle portion 200 and the screw portion 100 as an integrated structure, problems that may occur during traditional welding or assembly processes, such as weld failure and assembly errors, are eliminated. This integrated design simplifies the manufacturing process, reduces the number of components, and lowers production costs and assembly complexity. More importantly, it improves the coaxiality between the valve needle portion 200 and the screw portion 100, ensuring consistent and reliable movement, which is particularly important for electronic expansion valves with high control precision requirements.

[0034] Based on the above embodiment, a spring seat 320 is installed in the mounting hole 310. The spring seat 320 is fixedly connected to the fixed seat 300. One end of the elastic member 500 is in contact with the spring seat 320 and the other end is in contact with the valve seat block 400.

[0035] This embodiment further refines the structure of the valve seat module. By introducing a spring seat 320, the correct installation and stable operation of the elastic element 500 (spring) are ensured. The spring seat 320 can be screwed into the mounting hole 310 through a threaded structure. The presence of the spring seat 320 provides a stable support point for the elastic element 500, preventing it from tilting or misaligning during compression or tension, thereby ensuring the uniformity and reliability of the force applied by the elastic element 500.

[0036] Based on the above embodiment, the mounting hole 310 is configured as a stepped hole structure, with the small hole portion of the mounting hole 310 facing the valve needle portion 200, and the elastic element 500 and the valve seat block 400 both mounted on the large hole portion of the mounting hole 310; when the elastic element 500 is in a compressed state, the elastic element 500 applies a sealing pressure to the valve seat block 400 towards the small hole portion of the mounting hole 310.

[0037] The mounting hole 310 is designed as a stepped hole, meaning it has sections with different diameters. The smaller section faces the valve needle 200, while the larger section accommodates the elastic element 500 (spring) and the valve seat block 400. A spring seat 320 is installed at the end of the larger section of the mounting hole 310, preventing the valve seat block 400 from sliding out of the end of the larger section. The transition between the larger and smaller sections of the mounting hole 310 forms a stepped surface, which blocks the valve seat block 400, preventing it from sliding out of the end of the smaller section. This ensures that the valve seat block 400 can only float within the limited stroke range of the mounting hole 310.

[0038] like Figures 1 to 3 As shown, based on the above embodiment, a first sealing ring 420 is fitted on the outer peripheral surface of the valve seat block 400, and the first sealing ring 420 seals the gap between the valve seat block 400 and the mounting hole 310.

[0039] The first sealing ring 420 is located in the gap between the valve seat block 400 and the mounting hole 310, ensuring that the refrigerant will not leak through the gap, that is, the refrigerant can only flow out from the flow hole 410 of the valve seat block 400.

[0040] like Figure 1 , Figure 3 As shown, based on the above embodiment, one of the valve needle part 200 and the valve seat block 400 is a rigid hard part and the other is an elastic hard part. The hardness of the rigid hard part is greater than that of the elastic hard part. When the valve needle part 200 and the valve seat block 400 are pressed together, the elastic hard part fits tightly with the rigid hard part through its own elastic deformation characteristics, thereby forming an elastic sealing structure.

[0041] Preferably, the elastic rigid component is made of bronze, brass, plastic, or rubber.

[0042] It should be noted that the valve needle 200 and the valve seat block 400 can be made of two different materials with different hardness, that is, one with high hardness and the other with low hardness. When these two materials with different hardness are fitted together to seal (that is, the valve needle 200 seals the flow hole 410), they can form a sealing structure similar to a soft seal. That is, the one with lower hardness undergoes elastic deformation and thus fits tightly together with the one with higher hardness, thereby improving the sealing effect.

[0043] It should also be noted that since the valve needle portion 200 does not need to be mounted on the screw portion 100, the screw portion 100 and the valve needle portion 200 do not need to be welded. This means that non-metallic materials can be used in its manufacture, thereby achieving a soft sealing effect between the valve seat block 400 and the valve needle portion 200. If the valve needle portion 200 and the screw portion 100 need to be mounted by welding, then both the screw portion 100 and the valve needle portion 200 would need to be metal parts, and the valve seat block 400 would also need to be a metal part, thus failing to achieve a soft sealing effect.

[0044] Based on the above embodiments, the stroke position of the valve needle 200 relative to the valve seat block 400 also includes a fully open position, and an adjustment range is formed between the fully open position and the contact position; when the valve needle 200 is in the adjustment range, the tip of the valve needle 200 passes through the flow hole 410, and there is a gap between the valve needle 200 and the flow hole 410. The stroke position of the valve needle 200 in the adjustment range determines the effective flow area of ​​the flow hole 410.

[0045] The fully open position is when the valve needle 200 is completely withdrawn from the flow orifice 410, at which point the maximum refrigerant flow is allowed through the flow orifice 410. The adjustment range is the area where the valve needle 200 can adjust its position relative to the valve seat block 400 to change the effective flow area of ​​the flow orifice 410. Within this adjustment range, the tip of the valve needle 200 penetrates the flow orifice 410, but there is a certain gap between it and the wall of the flow orifice 410, ensuring that the refrigerant can flow between them. The specific stroke position of the valve needle 200 within the adjustment range determines the effective flow area of ​​the flow orifice 410, thereby controlling the amount of refrigerant passing through the expansion valve. As the valve needle 200 gradually approaches the contact position, the effective flow area of ​​the flow orifice 410 decreases, thus reducing the refrigerant flow rate; conversely, when the valve needle 200 moves away from the contact position, the flow area increases, increasing the flow rate.

[0046] like Figures 1 to 3 As shown, based on the above embodiment, it also includes a valve body 600, a valve cavity 610 is provided inside the valve body 600, a screw part 100 is connected to the valve body 600, a valve needle part 200 is movably disposed in the valve cavity 610, a fixed seat 300 is connected to the outlet end of the valve cavity 610, and a flow hole 410 is set as the outlet of the valve cavity 610.

[0047] The flow orifice 410 is precisely aligned with the outlet end of the valve cavity 610, thus making the flow orifice 410 the de facto outlet of the valve cavity 610. When the control system issues a command, the screw 100 drives the valve needle 200 to move within the valve cavity 610. The positional change of the valve needle 200 directly determines the effective flow area of ​​the flow orifice 410, thereby controlling the amount of refrigerant passing through the expansion valve. The mounting base 300 not only provides physical support but also acts as a seal, ensuring that the refrigerant can only flow out of the valve cavity 610 through the flow orifice 410.

[0048] Based on the above embodiments, a vehicle includes an electronic expansion valve. The electronic expansion valve is installed before the evaporator inlet of the air conditioning system, located between the condenser and the evaporator. It is responsible for regulating the amount of refrigerant flowing from the condenser to the evaporator to maintain the required temperature and humidity conditions inside the vehicle. The stroke position of the magnetic rotor of the electronic expansion valve is controlled by the vehicle's electronic control system (such as an ECU).

[0049] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0050] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An electronic expansion valve for automobiles, characterized in that, include: The screw module is configured as an integrally formed structure. The screw module includes a screw part (100) and a valve needle part (200). The valve needle part (200) is integrally connected to the screw part (100) and the two are coaxially arranged. A valve seat module includes a fixed seat (300), a valve seat block (400), and an elastic element (500). The fixed seat (300) is provided with a mounting hole (310), and the valve seat block (400) is provided with a flow hole (410). The valve seat block (400) is slidably installed in the mounting hole (310), and the elastic element (500) is installed in the mounting hole (310). The valve seat block (400) and the elastic element (500) are connected to form a floating structure. The valve needle portion (200) is coaxially arranged with the flow hole (410). The screw module is configured as a moving part capable of actively moving relative to the valve seat module. The travel position of the valve needle (200) relative to the valve seat block (400) includes a contact position and a limit position, and a closing interval is formed between the contact position and the limit position. When the valve needle (200) is in any position within the closing interval, the valve needle (200) abuts against the valve seat block (400) and seals the flow hole (410). The elastic member (500) is in a compressed state and applies a sealing pressure to the valve seat block (400) to make it tightly adhere to the valve needle (200).

2. The automotive electronic expansion valve as described in claim 1, characterized in that: A spring seat (320) is installed in the mounting hole (310). The spring seat (320) is fixedly connected to the fixed seat (300). One end of the elastic element (500) is in contact with the spring seat (320) and the other end is in contact with the valve seat block (400).

3. The automotive electronic expansion valve as described in claim 2, characterized in that: The mounting hole (310) is configured as a stepped hole structure, with the small hole portion of the mounting hole (310) facing the valve needle portion (200). The elastic element (500) and the valve seat block (400) are both installed in the large hole portion of the mounting hole (310). When the elastic element (500) is in a compressed state, the elastic element (500) applies a sealing pressure to the valve seat block (400) towards the small hole portion of the mounting hole (310).

4. An electronic expansion valve for vehicles as described in claim 1 or 2, characterized in that: The outer circumferential surface of the valve seat block (400) is fitted with a first sealing ring (420), which seals the gap between the valve seat block (400) and the mounting hole (310).

5. The automotive electronic expansion valve as described in claim 1, characterized in that: Of the valve needle (200) and the valve seat block (400), one is a rigid component and the other is an elastic component. The hardness of the rigid component is greater than that of the elastic component. When the valve needle (200) and the valve seat block (400) are pressed together, the elastic component fits tightly with the rigid component through its own elastic deformation characteristics, thereby forming an elastic sealing structure.

6. The automotive electronic expansion valve as described in claim 5, characterized in that: The flexible rigid parts are made of bronze, brass, plastic, or rubber.

7. The automotive electronic expansion valve as described in claim 1, characterized in that: The travel position of the valve needle (200) relative to the valve seat block (400) also includes a fully open position, and an adjustment range is formed between the fully open position and the contact position; when the valve needle (200) is in the adjustment range, the tip of the valve needle (200) passes through the flow hole (410), and there is a gap between the valve needle (200) and the flow hole (410), and the travel position of the valve needle (200) in the adjustment range determines the effective flow area of ​​the flow hole (410).

8. The automotive electronic expansion valve as described in claim 4, characterized in that: It also includes a valve body (600), a valve cavity (610) is provided inside the valve body (600), the screw part (100) is connected to the valve body (600), the valve needle part (200) is movably disposed in the valve cavity (610), the fixed seat (300) is connected to the outlet end of the valve cavity (610), and the flow hole (410) is set as the outlet of the valve cavity (610).

9. An electronic expansion valve for vehicles as described in claim 1, 2, or 3, characterized in that: The elastic element (500) is a spring.

10. A vehicle, characterized in that, Including the automotive electronic expansion valve as described in any one of claims 1-9.

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