Automobile air conditioner expansion valve with effects of preventing noise and improving heat exchange performance

Abstract

The invention relates to the field of automobile air conditioner expansion valve structures, and discloses an automobile air conditioner expansion valve with the effects of preventing noise and improving heat exchange performance, the automobile air conditioner expansion valve comprises a delay assembly and a driven part, the delay assembly can drive a ball valve to delay movement, meanwhile, the refrigerant flow change is stabilized, and the heat exchange efficiency is improved. According to the automobile air conditioner, the temperature stability can be further maintained through linkage of the driven part and the delay assembly, the comfort is improved, the stable change of the flow of a refrigerant is achieved, the pressure fluctuation noise is reduced, and the automobile air conditioner is suitable for being popularized and used. Through linkage of the driven part and the delay assembly, it can be avoided that the flow of a refrigerant in a pipeline changes drastically, large flowing noise is generated, the driving comfort is improved, and meanwhile the temperature sensing of a driver and passengers can be slowly adjusted by driving the ball valve to move in a delayed mode; and the driving comfort is prevented from being reduced due to sudden overcooling or insufficient cooling of the temperature in the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of automotive air - conditioning expansion valve structures, and specifically to an automotive air - conditioning expansion valve with noise - prevention and heat - transfer performance improvement effects. Background Art

[0002] In traditional fuel - powered vehicles, the automotive air - conditioning expansion valve is one of the key components of the air - conditioning system. Whether it is a manual air - conditioning or an automatic air - conditioning system, the expansion valve plays a role in regulating the refrigerant dosage and maintaining the pressure and temperature balance of the system. In the hot summer, when the driver turns on the air - conditioning, the expansion valve automatically adjusts the valve opening according to the temperature and pressure signals at the outlet of the evaporator, allowing an appropriate amount of low - temperature and low - pressure liquid refrigerant to enter the evaporator for evaporation and heat absorption, thereby reducing the temperature inside the vehicle.

[0003] Therefore, based on the existing automotive air - conditioning expansion valve in actual use, when the temperature inside the vehicle changes slightly, the expansion valve will immediately respond, resulting in an instantaneous change in the refrigerant flow rate. This may cause the temperature inside the vehicle to be either super - cold or not cold enough, and the temperature fluctuation is large, unable to provide a stable and comfortable riding environment for passengers. At the same time, during vehicle travel, when the vehicle enters a sun - exposed area from a shaded area, the temperature inside the vehicle rises. If the expansion valve immediately opens fully to increase the refrigerant flow rate, the temperature inside the vehicle may drop too much rapidly. And when the vehicle enters a shaded area again, since the expansion valve cannot close in time, it may cause the temperature inside the vehicle to be too low, affecting the riding comfort. Moreover, the rapidly opening and closing expansion valve cannot smoothly control the flow of the refrigerant in the pipeline, resulting in a drastic change in the refrigerant flow rate in the pipeline, generating a relatively large flow noise. When the expansion valve suddenly opens wide, the refrigerant rushes into the pipeline rapidly, making a noise similar to a whistling or hissing sound; when suddenly closed, it may cause a water - hammer phenomenon in the pipeline, making a thumping sound. This abnormal noise will affect the quiet environment inside the vehicle and reduce the riding and driving comfort. For this reason, we propose an automotive air - conditioning expansion valve with noise - prevention and heat - transfer performance improvement effects. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an automotive air - conditioning expansion valve with noise - prevention and heat - transfer performance improvement effects, which has the advantages of high heat - transfer performance and low noise, and solves a series of problems such as large temperature fluctuations inside the vehicle, poor heat - transfer performance, and significant noise impact.

[0005] To achieve the above - mentioned purpose, the present invention provides the following technical solution: An automotive air - conditioning expansion valve with noise - prevention and heat - transfer performance improvement effects, including, An expansion valve, the expansion valve includes a valve body; A temperature - sensing valve, the temperature - sensing valve includes a temperature - sensing bulb threadedly connected to the top of the valve body, and a first valve core is fixedly connected to the driving end of the temperature - sensing bulb; Driven member, the driven member includes a ball valve movably connected inside the valve body, and the top of the ball valve abuts against a second valve core; Delay component, the delay component includes a driving rack and a driven rack respectively fixedly connected to the bottom of the first valve core and the top of the second valve core. A connecting shaft is fixedly connected inside the valve body. One side of the driving rack meshes with a driving gear. A rotating ring is unidirectionally rotatably connected inside the driving gear. An outer ring is unidirectionally rotatably connected to the outside of the connecting shaft. The outside of the outer ring is fixedly connected to the outside of the rotating ring. One side of the rotating ring is damping rotatably connected to a torsion spring. The other end of the torsion spring is fixedly connected to a driven gear. The driven gear is damping rotatably connected to the outside of the connecting shaft. The driven gear meshes with the driven rack.

[0006] Preferably, a rotating block is rotatably connected to one side of the driving gear. A tension spring is fixedly connected to one side of the rotating block. One end of the tension spring is fixedly connected to a fixed block. The fixed block is fixedly connected to one side of the driving gear. The rotating block is adapted to the inside of the driving gear and the outside of the rotating ring.

[0007] Preferably, an inner ring is fixedly connected to the outside of the connecting shaft. A clamping block is rotatably connected to the outside of the inner ring. A spring piece is fixedly connected to one side of the clamping block. One end of the spring piece is fixedly connected to the outside of the inner ring. A card slot is formed in the outside of the outer ring. The clamping block is adapted to the card slot.

[0008] Preferably, a rotating shell is fixedly connected to one side of the rotating ring. A damping ring is rotatably connected inside the rotating shell. Two friction plates are slidably connected inside the damping ring. A damping spring is fixedly connected to the opposite sides of the two friction plates. A limiting frame is fixedly connected to one side of the damping ring. One end of the torsion spring is fixedly connected to one side of the limiting frame. A limiting rod is fixedly connected to one side of the driving gear. The outside of the limiting rod is adapted to the limiting frame.

[0009] Preferably, a damping rotating shaft is arranged on the outside of the connecting shaft. The outside of the connecting shaft is fixedly connected to the inside of the damping rotating shaft. The inside of the driven gear is fixedly connected to the outside of the damping rotating shaft.

[0010] Preferably, the driven member further includes a driven shell rotatably connected to the bottom of the valve body. A return spring is fixedly connected to the bottom of the inner wall of the driven shell. The top of the return spring is fixedly connected to a mounting shell. The ball valve is fixedly installed at the bottom of the inner wall of the mounting shell. A hydraulic sleeve is fixedly connected to the bottom of the inner wall of the driven shell. A hydraulic pipe is slidably connected to the top of the hydraulic sleeve. Hydraulic oil is filled in the hydraulic sleeve and the hydraulic pipe.

[0011] Preferably, a hydraulic sheet is fixedly connected to the inner wall of the hydraulic pipe. A plurality of hydraulic cylinders are fixedly connected inside the hydraulic sheet. A liquid outlet cover is fixedly connected to the bottom of the hydraulic cylinder. A pressure relief hole and a liquid flow hole are formed in the bottom of the liquid outlet cover. A blocking frame is fixedly connected to the inner wall of the hydraulic cylinder. A telescopic spring is fixedly connected to the bottom of the blocking frame. A steel ball is fixedly connected to the bottom of the telescopic spring. The steel ball is adapted to the liquid flow hole.

[0012] Preferably, the expansion valve further includes a high-pressure inlet and a high-pressure outlet respectively formed on both sides of the valve body. The high-pressure inlet and the high-pressure outlet are communicated through a ball valve. A low-pressure inlet and a low-pressure outlet are respectively formed on both sides of the valve body. The low-pressure inlet and the low-pressure outlet are communicated.

[0013] Preferably, a silent spring is fixedly connected to one side of the inner wall of the high-pressure outlet. One end of the silent spring is fixedly connected to a silent sheet. The silent sheet is slidably connected inside the high-pressure outlet.

[0014] Preferably, both the first valve core and the second valve core are hermetically and slidably connected inside the valve body.

[0015] Compared with the prior art, the present invention provides an automotive air-conditioning expansion valve with the effects of noise prevention and heat exchange performance improvement, and has the following beneficial effects: 1. The invention can drive the ball valve to move with a delay through the provided delay component, and at the same time smoothly change the refrigerant flow rate, maintain the stability of the vehicle interior temperature to improve comfort, and achieve the reduction of noise generated by pipeline resonance. The invention can further maintain temperature stability to improve comfort and achieve smooth change of refrigerant flow rate and reduce pressure fluctuation noise through the linkage of the driven member and the delay component.

[0016] 2. The invention can also avoid the large and sudden change in the refrigerant flow rate in the pipeline through the linkage of the driven member and the delay component, which will generate relatively large flow noise and improve the driving and riding comfort. At the same time, driving the ball valve to move with a delay can slowly adjust the temperature perception of the passengers, and avoid sudden overcooling or insufficient cooling of the vehicle interior temperature to reduce the driving and riding comfort.

[0017] 3. The invention can reduce the noise of the flowing refrigerant and improve the vaporization effect of the refrigerant through the provided silent spring and silent sheet, and can also perform adaptive adjustment according to the flow rate of the refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural schematic diagram of the interior of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the delay component part of the present invention; Figure 4 Schematic perspective view of the connecting shaft part of the present invention; Figure 5 Schematic perspective view of the rotating block part of the present invention; Figure 6 is Figure 5 Enlarged schematic view of part B of Figure 7 Schematic perspective view of the limit frame part of the present invention; Figure 8 Schematic perspective view of the hydraulic sheet part of the present invention; Figure 9 Schematic perspective view of the hydraulic cylinder part of the present invention; Figure 10 is Figure 2 Enlarged schematic view of part A of

[0019] In the figure: 1, expansion valve; 2, temperature sensing valve; 3, delay component; 4, follower; 5, valve body; 6, low-pressure inlet; 7, low-pressure outlet; 8, high-pressure inlet; 9, high-pressure outlet; 10, temperature sensing bulb; 11, first valve core; 12, second valve core; 13, follower housing; 14, return spring; 15, mounting housing; 16, ball valve; 17, hydraulic sleeve; 18, hydraulic pipe; 19, hydraulic sheet; 20, driving rack; 21, driving gear; 22, rotating ring; 23, rotating block; 24, tension spring; 25, fixed block; 26, rotating housing; 27, damping ring; 28, friction plate; 29, damping spring; 30, outer ring; 31, inner ring; 32, clamping block; 33, spring plate; 34, card slot; 35, connecting shaft; 36, limit frame; 37, limit rod; 38, torsion spring; 39, driven gear; 40, driven rack; 41, hydraulic cylinder; 42, liquid outlet cover; 43, pressure reducing hole; 44, liquid flowing hole; 45, retaining frame; 46, telescopic spring; 47, steel ball; 48, silent spring; 49, silent sheet; 50, damping rotating shaft. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes an automotive air-conditioning expansion valve with noise prevention and heat exchange performance improvement effects.

[0022] In a typical implementation manner of the present application, asFigures 1 - 10 As shown in Figures 1 - 10 , an automotive air-conditioning expansion valve with noise-proofing and heat exchange performance improvement effects includes an expansion valve 1, a compressor, a condenser, and an evaporator. Refrigerant circulates internally in the expansion valve 1, the compressor, the condenser, and the evaporator. The refrigeration principle of the automotive air conditioner is prior art and will not be elaborated here. The expansion valve 1, which includes a valve body 5. The expansion valve 1 also includes a high-pressure inlet 8 and a high-pressure outlet 9 respectively opened on both sides of the valve body 5. On both sides of the valve body 5, a low-pressure inlet 6 and a low-pressure outlet 7 are also respectively opened, and the low-pressure inlet 6 and the low-pressure outlet 7 are connected and communicated. The temperature-sensing valve 2, which includes a temperature-sensing bulb 10 threadedly connected to the top of the valve body 5. A first valve core 11 is fixedly connected to the driving end of the temperature-sensing bulb 10. The temperature-sensing bulb 10 is prior art and will not be elaborated here. The follower 4, which includes a ball valve 16 movably connected inside the valve body 5. The high-pressure inlet 8 and the high-pressure outlet 9 are connected and communicated through the ball valve 16. The top of the ball valve 16 abuts against a second valve core 12. Both the first valve core 11 and the second valve core 12 are hermetically and slidably connected inside the valve body 5. The follower 4 also includes a follower housing 13 rotatably connected to the bottom of the valve body 5. A return spring 14 is fixedly connected to the bottom inner wall of the follower housing 13. The top of the return spring 14 is fixedly connected to a mounting housing 15. The ball valve 16 is fixedly installed on the bottom inner wall of the mounting housing 15. Specifically, the temperature-sensing bulb 10 drives the first valve core 11 to move up and down by detecting the temperature change of the refrigerant inside the low-pressure inlet 6. The up and down movement of the first valve core 11 indirectly drives the second valve core 12 to move up and down. The up and down movement of the second valve core 12 drives the ball valve 16 to move up and down through the expansion and contraction of the return spring 14, controlling the flow rate of the refrigerant pumped from the high-pressure inlet 8 into the high-pressure outlet 9, thereby achieving precise refrigeration.

[0023] The delay assembly 3, which includes a driving rack 20 and a driven rack 40 respectively fixedly connected to the bottom of the first valve core 11 and the top of the second valve core 40. A connecting shaft 35 is fixedly connected inside the valve body 5. A driving gear 21 is meshed with one side of the driving rack 20. A rotating ring 22 is unidirectionally rotatably connected inside the driving gear 21. An outer ring 30 is unidirectionally rotatably connected to the outside of the connecting shaft 35. The outside of the outer ring 30 is fixedly connected to the outside of the rotating ring 22. A torsion spring 38 is damping rotatably connected to one side of the rotating ring 22. The other end of the torsion spring 38 is fixedly connected to a driven gear 39. The driven gear 39 is damping rotatably connected to the outside of the connecting shaft 35. The driven gear 39 is meshed with the driven rack 40. One side of the driving gear 21 is rotatably connected with a rotating block 23. One side of the rotating block 23 is fixedly connected with a tension spring 24. One end of the tension spring 24 is fixedly connected with a fixed block 25. The fixed block 25 is fixedly connected to one side of the driving gear 21. The rotating block 23 is adapted to the interior of the driving gear 21 and the exterior of the rotating ring 22; An inner ring 31 is fixedly connected to the exterior of the connecting shaft 35. A clamping block 32 is rotatably connected to the exterior of the inner ring 31. One side of the clamping block 32 is fixedly connected with a spring piece 33. One end of the spring piece 33 is fixedly connected to the exterior of the inner ring 31. A clamping groove 34 is formed in the exterior of the outer ring 30. The clamping block 32 is adapted to the clamping groove 34; One side of the rotating ring 22 is fixedly connected with a rotating shell 26. A damping ring 27 is rotatably connected to the interior of the rotating shell 26. Two friction plates 28 are slidably connected to the interior of the damping ring 27. A damping spring 29 is fixedly connected to the opposite sides of the two friction plates 28. One side of the damping ring 27 is fixedly connected with a limiting frame 36. One end of a torsion spring 38 is fixedly connected to one side of the limiting frame 36. One side of the driving gear 21 is fixedly connected with a limiting rod 37. The exterior of the limiting rod 37 is adapted to the limiting frame 36. A damping rotating shaft 50 is arranged on the exterior of the connecting shaft 35. The exterior of the connecting shaft 35 is fixedly connected to the interior of the damping rotating shaft 50. The interior of the driven gear 39 is fixedly connected to the exterior of the damping rotating shaft 50.

[0024] With the above - set structure, it can drive the ball valve 16 to move delayed, maintain temperature stability to improve comfort, and at the same time avoid frequent start - stop of the compressor to reduce pressure fluctuations and protect the components of the air - conditioning system, and smooth the change of refrigerant flow rate, achieving the effect of alleviating pipeline resonance noise and reducing the noise of compressor load change. Specifically, the temperature sensing bulb 10 drives the first valve core 11 to move up and down by detecting the temperature change of the refrigerant inside the low - pressure inlet 6. When the temperature sensing bulb 10 detects that the temperature of the refrigerant inside the low - pressure inlet 6 rises, the driving end of the temperature sensing bulb 10 drives the first valve core 11 to move downward. When the temperature sensing bulb 10 detects that the temperature of the refrigerant inside the low - pressure inlet 6 drops, the driving end of the temperature sensing bulb 10 drives the first valve core 11 to move upward. The up - and - down movement of the first valve core 11 drives the driving rack 20 to move up and down. The up - and - down movement of the driving rack 20 drives the driving gear 21 to rotate; When the driving rack 20 moves downward, the movement of the driving rack 20 drives the driving gear 21 to rotate counterclockwise. The counterclockwise rotation of the driving gear 21 drives the outer part of the rotating block 23 to be clamped with the inside of the driving gear 21 and the outside of the rotating ring 22 respectively. At this time, the counterclockwise rotation of the driving gear 21 drives the rotating ring 22 to rotate counterclockwise, and the counterclockwise rotation of the rotating ring 22 drives the rotating housing 26 to rotate counterclockwise. Since the friction plate 28 inside the damping ring 27 abuts against the inner wall of the rotating housing 26 through the damping spring 29, the counterclockwise rotation of the rotating housing 26 drives the damping ring 27 to rotate counterclockwise, and the counterclockwise rotation of the damping ring 27 drives the limiting frame 36 to rotate counterclockwise. At the same time, the counterclockwise rotation of the driving gear 21 causes the outside of the limiting rod 37 to abut against one side of the limiting frame 36, and drives the limiting frame 36 to rotate counterclockwise through the limiting rod 37. The counterclockwise rotation of the limiting frame 36 drives the torsion spring 38 to rotate counterclockwise, and stores the torsional force inside the torsion spring 38. The torsional force inside the torsion spring 38 is slowly released onto the driven gear 39 through the damping rotating shaft 50, driving the driven gear 39 to rotate counterclockwise. The counterclockwise rotation of the driven gear 39 drives the engaged driven rack 40 to move downward, and the downward movement of the driven rack 40 drives the second valve core 12 to move downward. The downward movement of the second valve core 12 drives the return spring 14 to contract, causing the ball valve 16 to move downward, completing the slow movement of the ball valve 16; When the driving rack 20 moves upward, the movement of the driving rack 20 drives the driving gear 21 to rotate clockwise. The clockwise rotation of the driving gear 21 drives the limiting rod 37 to rotate clockwise, causing the outside of the limiting rod 37 to separate from one side of the limiting frame 36. At this time, the torsional force inside the torsion spring 38 drives the damping ring 27 to slowly rotate clockwise inside the rotating housing 26, slowly releasing the torsional force accumulated inside the torsion spring 38. During the process of slowly releasing the torsional force accumulated inside the torsion spring 38, the other end of the torsion spring 38 still drives the driven gear 39 to slowly rotate counterclockwise, causing the torsional force transmitted to the driven gear 39 to be greatly reduced when the torsion spring 38 drives the limiting frame 36 to rotate clockwise, achieving a delay buffering effect; More specifically, when the driving gear 21 rotates clockwise and the torsional force accumulated inside the torsion spring 38 drives the damping ring 27 to slowly rotate inside the rotating housing 26, at this time, the clamping block 32 is stuck inside the clamping groove 34, preventing the rotating housing 26 from rotating clockwise following the damping ring 27, achieving the effect of slowly releasing the torsional force, thereby reducing noise with high heat transfer performance; It is worth mentioning that when the temperature sensing bulb 10 detects that the temperature of the refrigerant inside the low-pressure inlet 6 decreases, the driving end of the temperature sensing bulb 10 driving the first valve core 11 to move upward will not cause negative pressure damage to the temperature sensing bulb 10, improving the service life of the temperature sensing bulb 10.

[0025] The bottom of the inner wall of the driven housing 13 is fixedly connected with a hydraulic sleeve 17. A hydraulic pipe 18 is slidably connected to the top of the hydraulic sleeve 17. The inside of the hydraulic sleeve 17 and the hydraulic pipe 18 is filled with hydraulic oil; The inner wall of the hydraulic pipe 18 is fixedly connected with a hydraulic piece 19. A number of hydraulic cylinders 41 are fixedly connected to the inside of the hydraulic piece 19. The bottom of the hydraulic cylinder 41 is fixedly connected with a liquid outlet cover 42. A pressure reducing hole 43 and a liquid flowing hole 44 are formed in the bottom of the liquid outlet cover 42. A retaining frame 45 is fixedly connected to the inner wall of the hydraulic cylinder 41. A telescopic spring 46 is fixedly connected to the bottom of the retaining frame 45. A steel ball 47 is fixedly connected to the bottom of the telescopic spring 46. The steel ball 47 is adapted to the liquid flowing hole 44.

[0026] Further, in the above solution, through the above - set structure, the blocking of the ball valve 16 to the high - pressure inlet 8 and the high - pressure outlet 9 can be delayed, further maintaining temperature stability and improving comfort, realizing a smooth change in the refrigerant flow rate, and reducing pressure fluctuation noise. Specifically, through the set delay component 3, the descending speed of the second valve core 12 has been delayed. When the second valve core 12 descends, the second valve core 12 will directly drive the ball valve 16 to move downward. The downward movement of the ball valve 16 drives the mounting housing 15 to move downward. The downward movement of the mounting housing 15 drives the hydraulic pipe 18 to move downward inside the hydraulic sleeve 17. During the movement of the hydraulic pipe 18, the pressure of the hydraulic oil inside the hydraulic sleeve 17 increases and presses the steel ball 47 out of the liquid flowing hole 44. At this time, the hydraulic oil inside the hydraulic sleeve 17 can quickly enter the inside of the hydraulic pipe 18 through the liquid flowing hole 44 and the pressure reducing hole 43, realizing the direct movement of the ball valve 16. When the second valve core 12 moves upward, at this time, since the steel ball 47 abuts against the inside of the liquid flowing hole 44 through the telescopic spring 46, the return spring 14 extends, so that part of the hydraulic oil in the hydraulic pipe 18 can only slowly enter the inside of the hydraulic sleeve 17 through the pressure reducing hole 43, making the mounting housing 15 drive the ball valve 16 to rise slowly, realizing the delayed blocking of the ball valve 16 to the high - pressure inlet 8 and the high - pressure outlet 9, and high heat exchange performance; It is worth mentioning that driving the ball valve 16 to move with a delay can slowly adjust the temperature perception of the driver and passengers, avoiding sudden over - cooling or insufficient coldness inside the vehicle and reducing the driving and riding comfort.

[0027] One side of the inner wall of the high - pressure outlet 9 is fixedly connected with a silent spring 48. One end of the silent spring 48 is fixedly connected with a silent piece 49. The silent piece 49 is slidably connected inside the high - pressure outlet 9.

[0028] With the above-described structure, it is possible to reduce the noise of the refrigerant pumped into the high-pressure outlet 9 through the high-pressure inlet 8, and to effectively control the distance of the sound insulation sheet 49 according to the flow rate and pressure of the refrigerant, preventing the refrigerant in a low-temperature and foggy state from sealing the sound insulation sheet 49 and avoiding ineffective cooling due to non-circulation of the refrigerant. Specifically, when the flow rate and pressure of the refrigerant pumped into the high-pressure outlet 9 through the high-pressure inlet 8 increase, the pressure of the refrigerant at this time pushes the sound insulation sheet 49 to move away from the input end of the high-pressure outlet 9, so that while reducing noise, it can also prevent the refrigerant that has not been completely vaporized from adhering to the surface of the sound insulation sheet 49 in a foggy state, resulting in the sealing of the sound insulation sheet 49, thereby avoiding ineffective cooling of the vehicle interior. Thus, while achieving high heat transfer performance, the heat transfer noise is reduced.

[0029] Working principle of the present invention: The temperature sensing bulb 10 drives the first valve core 11 to move up and down by detecting the temperature change of the refrigerant inside the low-pressure inlet 6; When the temperature of the refrigerant inside the low-pressure inlet 6 rises, the driving rack 20 moves to drive the driving gear 21 to rotate counterclockwise. The counterclockwise rotation of the driving gear 21 causes the outer parts of the rotating block 23 to be respectively engaged with the inside of the driving gear 21 and the outside of the rotating ring 22. At this time, the counterclockwise rotation of the driving gear 21 drives the rotating ring 22 to rotate counterclockwise. The counterclockwise rotation of the rotating ring 22 drives the rotating shell 26 to rotate counterclockwise. Since the friction plate 28 inside the damping ring 27 abuts against the inner wall of the rotating shell 26 through the damping spring 29, the counterclockwise rotation of the rotating shell 26 drives the damping ring 27 to rotate counterclockwise. The counterclockwise rotation of the damping ring 27 drives the limiting frame 36 to rotate counterclockwise. At the same time, the counterclockwise rotation of the driving gear 21 causes the outside of the limiting rod 37 to abut against one side of the limiting frame 36, and drives the limiting frame 36 to rotate counterclockwise through the limiting rod 37. The counterclockwise rotation of the limiting frame 36 drives the torsion spring 38 to rotate counterclockwise, and stores the torsional force inside the torsion spring 38. The torsional force inside the torsion spring 38 is slowly released onto the driven gear 39 through the damping rotating shaft 50, driving the driven gear 39 to rotate counterclockwise. The counterclockwise rotation of the driven gear 39 drives the engaged driven rack 40 to move downward. The downward movement of the driven rack 40 drives the second valve core 12 to move downward. The downward movement of the second valve core 12 drives the return spring 14 to contract, causing the ball valve 16 to move downward, completing the slow movement of the ball valve 16; When the temperature of the refrigerant inside the low-pressure inlet 6 decreases, the driving rack 20 moves to drive the driving gear 21 to rotate clockwise. The clockwise rotation of the driving gear 21 drives the limiting rod 37 to rotate clockwise, causing the outside of the limiting rod 37 to separate from one side of the limiting frame 36. At this time, the latch 32 is stuck inside the card slot 34, preventing the rotating shell 26 from rotating clockwise along with the damping ring 27. At this time, the torsional force inside the torsion spring 38 drives the damping ring 27 to slowly rotate clockwise inside the rotating shell 26, slowly releasing the torsional force accumulated inside the torsion spring 38. During the process of slowly releasing the torsional force accumulated inside the torsion spring 38, the other end of the torsion spring 38 still drives the driven gear 39 to slowly rotate counterclockwise, so that when the torsion spring 38 drives the limiting frame 36 to rotate clockwise, the torsional force transmitted to the driven gear 39 is greatly reduced, achieving the effect of delaying buffering and slowly releasing the torsional force; When the second valve core 12 descends, the second valve core 12 will directly drive the ball valve 16 to move downward. The downward movement of the ball valve 16 drives the mounting shell 15 to move downward. The downward movement of the mounting shell 15 drives the hydraulic pipe 18 to move downward inside the hydraulic sleeve 17. During the movement of the hydraulic pipe 18, the hydraulic pressure of the hydraulic oil inside the hydraulic sleeve 17 increases and presses the steel ball 47 out of the liquid flow hole 44. At this time, the hydraulic oil inside the hydraulic sleeve 17 can quickly enter the inside of the hydraulic pipe 18 through the liquid flow hole 44 and the pressure relief hole 43, realizing the direct movement of the ball valve 16. When the second valve core 12 moves upward, at this time, since the steel ball 47 abuts against the inside of the liquid flow hole 44 through the telescopic spring 46 and the return spring 14 extends, part of the hydraulic oil inside the hydraulic pipe 18 can only slowly enter the inside of the hydraulic sleeve 17 through the pressure relief hole 43, causing the mounting shell 15 to drive the ball valve 16 to slowly rise, realizing the delayed blocking of the high-pressure inlet 8 and the high-pressure outlet 9 by the ball valve 16.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automobile air conditioning expansion valve with noise prevention and heat exchange performance improvement effect, characterized in that: include, An expansion valve (1), the expansion valve (1) comprising a valve body (5); A temperature-sensitive valve (2), the temperature-sensitive valve (2) comprising a temperature-sensitive package (10) threadedly connected to the top of a valve body (5), the driving end of the temperature-sensitive package (10) being fixedly connected to a first valve core (11); A follower (4), the follower (4) comprising a ball valve (16) movably connected to the inside of the valve body (5), the top of the ball valve (16) abutting against a second valve core (12); A delay assembly (3), the delay assembly (3) comprising an active rack (20) and a driven rack (40) respectively fixedly connected to the bottom of a first valve core (11) and the top of a second valve core (12); a connecting shaft (35) is fixedly connected inside the valve body (5); a driving gear (21) is meshed on one side of the active rack (20); a rotating ring (22) is unidirectionally connected inside the driving gear (21); an outer ring (30) is unidirectionally connected outside the connecting shaft (35); the outer portion of the outer ring (30) is fixedly connected to the outer portion of the rotating ring (22); a torsion spring (38) is connected to one side of the rotating ring (22) for damping rotation; the other end of the torsion spring (38) is fixedly connected to a driven gear (39); the driven gear (39) is connected to the outside of the connecting shaft (35) for damping rotation; the driven gear (39) is meshed with the driven rack (40).

2. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 1, characterized in that: A rotating block (23) is rotatably connected to one side of the driving gear (21), a tension spring (24) is fixedly connected to one side of the rotating block (23), one end of the tension spring (24) is fixedly connected to a fixed block (25), the fixed block (25) is fixedly connected to one side of the driving gear (21), and the rotating block (23) is adapted to the interior of the driving gear (21) and the exterior of the rotating ring (22).

3. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 1, characterized in that: The outer portion of the connecting shaft (35) is fixedly connected to the inner ring (31), the outer portion of the inner ring (31) is rotatably connected to a clamping block (32), one side of the clamping block (32) is fixedly connected to a spring sheet (33), one end of the spring sheet (33) is fixedly connected to the outer portion of the inner ring (31), a clamping groove (34) is provided on the outer portion of the outer ring (30), and the clamping block (32) is adapted to fit the clamping groove (34).

4. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 1, characterized in that: A rotating shell (26) is fixedly connected to one side of the rotating ring (22), a damping ring (27) is rotatably connected to the interior of the rotating shell (26), two friction plates (28) are slidably connected to the interior of the damping ring (27), a damping spring (29) is fixedly connected to the opposite side of the two friction plates (28), one side of the damping ring (27) is fixedly connected to a limiting frame (36), one end of the torsion spring (38) is fixedly connected to one side of the limiting frame (36), one side of the driving gear (21) is fixedly connected to a limiting rod (37), and the outside of the limiting rod (37) is adapted to the limiting frame (36).

5. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 1, characterized in that: A damping rotating shaft (50) is arranged outside the connecting shaft (35), the outside of the connecting shaft (35) is fixedly connected to the inside of the damping rotating shaft (50), and the inside of the driven gear (39) is fixedly connected to the outside of the damping rotating shaft (50).

6. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 1, characterized in that: The driven member (4) further comprises a driven housing (13) rotatably connected to the bottom of the valve body (5); a return spring (14) is fixedly connected to the bottom of the inner wall of the driven housing (13); a mounting housing (15) is fixedly connected to the top of the return spring (14); the ball valve (16) is fixedly mounted to the bottom of the inner wall of the mounting housing (15); a hydraulic sleeve (17) is fixedly connected to the bottom of the inner wall of the driven housing (13); a hydraulic pipe (18) is slidably connected to the top of the hydraulic sleeve (17); hydraulic oil is filled inside the hydraulic sleeve (17) and the hydraulic pipe (18).

7. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 6, characterized in that: The inner wall of the hydraulic pipe (18) is fixedly connected to a hydraulic plate (19), the interior of the hydraulic plate (19) is fixedly connected to a plurality of hydraulic cylinders (41), the bottom of the hydraulic cylinder (41) is fixedly connected to a liquid outlet cover (42), the bottom of the liquid outlet cover (42) is provided with a pressure reducing hole (43) and a liquid flow hole (44), the inner wall of the hydraulic cylinder (41) is fixedly connected to a retaining frame (45), the bottom of the retaining frame (45) is fixedly connected to a telescopic spring (46), the bottom of the telescopic spring (46) is fixedly connected to a steel ball (47), and the steel ball (47) is adapted to the liquid flow hole (44).

8. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 1, characterized in that: The expansion valve (1) further comprises a high-pressure inlet (8) and a high-pressure outlet (9) respectively provided on both sides of the valve body (5), the high-pressure inlet (8) and the high-pressure outlet (9) being connected via a ball valve (16), and a low-pressure inlet (6) and a low-pressure outlet (7) respectively provided on both sides of the valve body (5), the low-pressure inlet (6) and the low-pressure outlet (7) being connected.

9. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 8, characterized in that: A mute spring (48) is fixedly connected to one side of the inner wall of the high-pressure outlet (9), a mute plate (49) is fixedly connected to one end of the mute spring (48), and the mute plate (49) is slidably connected to the interior of the high-pressure outlet (9).

10. The automobile air-conditioning expansion valve with noise prevention and heat exchange performance improvement effect according to claim 1, characterized in that: The first valve core (11) and the second valve core (12) are both airtightly slidably connected inside the valve body (5).

Images