Refrigerant expansion valve and refrigeration appliance

Abstract

The refrigerant expansion valve comprises a shell and two throttling wheels, the throttling wheels are rotatably installed in the shell through transmission shafts correspondingly, the transmission shafts are in transmission connection with a driving assembly, the two throttling wheels make contact with each other, and the side portions of the two throttling wheels are provided with reducing throttling grooves correspondingly; the two throttling grooves are symmetrically formed, the two throttling grooves are in butt joint to form a valve port, and the hole diameter of the valve port is changed along with rotation of the two throttling wheels; the two ends of the shell are provided with an inlet pipe and an outlet pipe which are coaxial respectively, and the inlet pipe and the outlet pipe are coaxial with the valve port. The utility model further discloses a mass electric appliance adopting the refrigerant expansion valve. The refrigerant expansion valve can effectively control the refrigerant jet flow direction of the refrigerant expansion valve, and strong vibration and large noise caused by the fact that the refrigerant jet flow impacts the inner wall of a pipeline are prevented. The refrigeration electric appliance adopting the refrigerant expansion valve is lower in noise and better in user experience.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration appliances, and more precisely, to a refrigerant expansion valve and a refrigeration appliance. Background Art

[0002] Refrigeration appliances such as air conditioners and refrigerators all have the problem of excessive noise in the refrigeration system, which affects the user experience. At present, the field mainly focuses on improving the noise problems of compressors and fans in the refrigeration system. However, as the noise of compressors and fans continues to decrease, the noise of refrigerant flow becomes relatively more prominent. Refrigerant flow noise refers to the noise generated by the cyclic flow of refrigerant in the refrigeration system. Specifically, during the vapor compression refrigeration cycle process, the refrigerant undergoes a phase change at the throttling element and the evaporator, and the unstable gas-liquid two-phase refrigerant flow generates relatively large noise.

[0003] The existing throttling element is mainly an electronic expansion valve. The inlet and outlet of the electronic expansion valve are arranged perpendicular to each other, and a valve needle that moves coaxially with the outlet is arranged inside. By controlling the position of the valve needle, the size of the flow cross-section from the inlet to the outlet is changed. The high-temperature and high-pressure refrigerant flows through the throttling orifice and undergoes a phase change to form a low-temperature and low-pressure gas-liquid two-phase refrigerant. Due to the valve needle making the structures at the inlet and outlet asymmetric and the refrigerant flow velocity at the throttling orifice position being uneven, the direction of the refrigerant discharged from the valve body randomly and rhythmically impacts the inner wall of the pipeline, generating relatively large vibration and noise.

[0004] In summary, the field needs to improve the existing expansion valve to better control the refrigerant jet direction and jet uniformity of the expansion valve, and reduce vibration and noise. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a refrigerant expansion valve, which adopts a coaxial and symmetric structure for the inlet and outlet, and controls the valve port state through a set of symmetrically arranged throttling wheels to reduce the impact of the refrigerant jet of the refrigerant expansion valve on the inner wall of the pipeline and reduce noise.

[0006] Another purpose of the utility model is to provide a refrigeration appliance adopting the refrigerant expansion valve.

[0007] To achieve the above purpose, the utility model provides a refrigerant expansion valve, which includes a housing and two throttling wheels. The throttling wheels are respectively rotatably installed inside the housing through transmission shafts, and the transmission shafts are in transmission connection with a driving component. The two throttling wheels are in contact with each other, and the side parts of the two throttling wheels respectively have throttling grooves with variable diameters; the two throttling grooves are symmetrically arranged, and the two throttling grooves are butted to form a valve port, and the aperture of the valve port changes with the rotation of the two throttling wheels; both ends of the housing respectively have coaxial inlet pipes and outlet pipes, and both the inlet pipe and the outlet pipe are coaxial with the valve port.

[0008] Preferably, the two throttle wheels are a left throttle wheel and a right throttle wheel respectively. The left throttle wheel is rotatably installed inside the housing through a left transmission shaft, and the right throttle wheel is rotatably installed inside the housing through a right transmission shaft.

[0009] Preferably, the side of the left throttle wheel has a left throttle groove, and the side of the right throttle wheel has a right throttle groove. The left throttle groove and the right throttle groove are symmetrically arranged, and the left throttle groove and the right throttle groove are butted to form the valve port; the rotation directions of the left throttle wheel and the right throttle wheel are opposite.

[0010] Preferably, the left throttle groove is a variable-diameter circular arc groove with a left upper end and a left lower end. Along the direction from the left lower end to the left upper end, the groove diameter of the left throttle groove gradually increases from 0; the right throttle groove is a variable-diameter circular arc groove with a right upper end and a right lower end. Along the direction from the right lower end to the right upper end, the groove diameter of the right throttle groove gradually increases from 0; the left throttle groove and the right throttle groove have the same structural dimensions and are symmetrically arranged.

[0011] Preferably, the side of the left throttle wheel has a left tooth part, and the side of the right throttle wheel has a right tooth part. The left tooth part meshes with the right tooth part.

[0012] Preferably, the left tooth part covers the side of the left throttle groove, and the right tooth part covers the side of the right throttle groove.

[0013] Preferably, the housing is formed by sealing and installing an upper part including the inlet pipe and a lower part including the outlet pipe. The left transmission shaft and the right transmission shaft extend out of the housing through the connection part of the upper part and the lower part.

[0014] Preferably, a seal is included. The seal is arranged inside the housing, located at the joint of the upper part and the lower part. The seal abuts against the left throttle wheel and the right throttle wheel, and the seal surrounds the left transmission shaft and the right transmission shaft.

[0015] Preferably, a left connection hole is provided at the middle axis of the left throttle wheel. The left transmission shaft is inserted into the left connection hole, and a groove for engaging with the left transmission shaft is provided on the side wall of the left connection hole; a right connection hole is provided at the middle axis of the right throttle wheel. The right transmission shaft is inserted into the right connection hole and fixedly connected to the right throttle wheel, and a groove for engaging with the right transmission shaft is provided on the side wall of the right connection hole.

[0016] This application also provides a refrigeration appliance using the refrigerant expansion valve.

[0017] Compared with the prior art, the advantages of a refrigerant expansion valve and a refrigeration appliance disclosed by the present utility model are as follows: The refrigerant expansion valve can effectively control the direction of its refrigerant jet, improve the uniformity of the jet, and prevent strong vibration and large noise caused by the impact of the refrigerant jet on the inner wall of the pipeline; the refrigerant expansion valve adopts a symmetrical throttle wheel to control the valve port state, and the adjustment structure is stable and precise, not easily damaged; the refrigeration appliance using the refrigerant expansion valve has less noise and better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0019] As Figure 1 shown is a schematic view of the split structure of a refrigerant expansion valve of the present utility model.

[0020] As Figure 2 shown is a front sectional view of a refrigerant expansion valve of the present utility model.

[0021] As Figure 3 shown is a schematic view of the structure of the left throttle wheel of a refrigerant expansion valve of the present utility model.

[0022] As Figure 4 shown is a top view of the combined left and right throttle wheels of a refrigerant expansion valve of the present utility model.

[0023] As Figure 5 shown is a sectional view of a refrigerant expansion valve of the present utility model when passing through refrigerant.

[0024] As Figure 6 shown is a schematic view of the drive assembly of a refrigerant expansion valve of the present utility model.

[0025] As Figure 7 shown is a schematic view of the meshing of the left and right throttle wheels of a refrigerant expansion valve of the present utility model.

[0026] As Figure 8A shown is a front sectional view of the left and right throttle wheels of a refrigerant expansion valve of the present utility model when the valve port is fully open.

[0027] As Figure 8B shown is a top view of the left and right throttle wheels of a refrigerant expansion valve of the present utility model when the valve port is fully open.

[0028] As Figure 9AThe figure shows a front sectional view of the left and right throttle wheels during orifice throttling of a refrigerant expansion valve of the present utility model.

[0029] As Figure 9B The figure shows a top view of the left and right throttle wheels during orifice throttling of a refrigerant expansion valve of the present utility model.

[0030] As Figure 10A The figure shows a front sectional view of the left and right throttle wheels when the orifice of a refrigerant expansion valve of the present utility model is closed.

[0031] As Figure 10B The figure shows a top view of the left and right throttle wheels when the orifice of a refrigerant expansion valve of the present utility model is closed. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] As Figure 1 And Figure 2 As shown, a refrigerant expansion valve of the present application includes a housing 1, a left throttle wheel 2, a right throttle wheel 3, a left transmission shaft 4, and a right transmission shaft 5. The left throttle wheel 2 is rotatably installed inside the housing 1 through the left transmission shaft 4, and the right throttle wheel 3 is rotatably installed inside the housing 1 through the right transmission shaft 5. The left transmission shaft 4 and the right transmission shaft 5 penetrate the housing 1; the left throttle wheel 2 and the right throttle wheel 3 are in contact with each other, and an orifice 100 is formed at the contact position of the left throttle wheel 2 and the right throttle wheel 3. The open / closed state of the orifice 100 changes with the rotation of the left throttle wheel 2 and the right throttle wheel 3; both ends of the housing 1 are respectively provided with a coaxial inlet pipe 11 and an outlet pipe 12, and both the inlet pipe 11 and the outlet pipe 12 are coaxial with the orifice 100. Both the inlet pipe 11 and the outlet pipe 12 are connected to pipelines, and the parts of the left transmission shaft 4 and the right transmission shaft 5 extending out of the housing 1 are connected to a driving assembly. The high-temperature and high-pressure refrigerant enters the interior of the housing 1 through the inlet pipe 11. After throttling through the orifice 100, the refrigerant undergoes a phase change, forming a high-speed refrigerant valve jet that is coaxial with and centered in the outlet pipe 12, and then is ejected through the outlet pipe 12. The high-speed refrigerant valve jet will not impact the inner wall of the pipeline to generate a large noise, and the flow rate of the high-speed refrigerant valve jet is uniform, which can reduce the noise caused by the flow rate change; the rotation adjustment of the left and right throttle wheels is more stable and accurate, and is not easily damaged.

[0034] Furthermore, the housing 1 is a modular structure, formed by sealingly combining an upper portion including an inlet pipe 11 and a lower portion including an outlet pipe 12, and the left transmission shaft 4 and the right transmission shaft 5 extend out of the housing 1 through the connection between the upper portion and the lower portion. The modular structure of the housing 1 can facilitate assembly and maintenance operations.

[0035] The refrigerant expansion valve further includes a square-shaped seal 6, which is arranged inside the housing 1, and is located at the junction of the upper part and the lower part. The seal 6 abuts against the left throttle wheel 2 and the right throttle wheel 3, and the seal 6 is arranged around the left transmission shaft 4 and the right transmission shaft 5. Preferably, the seal 6 is a double seal to improve the sealing effect. Further, preferably, the seal 6 is an integrated structure. By arranging the seal 6, the sealing performance of the housing 1 can be improved, and the integrated seal 6 has a better sealing effect.

[0036] See also Figure 3 and Figure 4 The left throttle wheel 2 and the right throttle wheel 3 have the same structure and are symmetrically arranged. The left throttle wheel 2 has a left connecting hole 20 at the center axis, and the left transmission shaft 4 is inserted into the left connecting hole 20 and fixedly connected to the left throttle wheel 2; the side wall of the left connecting hole 20 has a groove engaged with the left transmission shaft 4, and the left throttle wheel 2 is driven to rotate synchronously during the rotation of the left transmission shaft 4. Correspondingly, the right throttle wheel 3 has a right connecting hole at the center axis, and the right transmission shaft 5 is inserted into the right connecting hole and fixedly connected to the right throttle wheel 3; the side wall of the right connecting hole has a groove engaged with the right transmission shaft 5, and the right throttle wheel 3 is driven to rotate synchronously during the rotation of the right transmission shaft 5.

[0037] See also Figure 6 The driving assembly includes a motor 7 and a gear reduction assembly 71. The motor is connected to the left transmission shaft 4 and the right transmission shaft 5 through the gear reduction assembly 71, driving the left transmission shaft 4 and the right transmission shaft 5 to rotate in opposite directions at the same speed. The motor 7 combined with the gear arrowhead assembly 71 can accurately control the rotation angle of the left transmission shaft 4 and the right transmission shaft 5, and the driving assembly is not easily disturbed by the impact of the refrigerant, and the stability and accuracy are better.

[0038] See also Figure 3 and Figure 4 The left throttle wheel 2 has a left throttle groove 21 on its side, and the right throttle wheel 3 has a right throttle groove 31 on its side. The left throttle groove 21 and the right throttle groove 31 are symmetrically arranged. The left throttle groove 21 and the right throttle groove 31 are connected to form a valve port 100, and when the left throttle groove 21 and the right throttle groove 31 are separated, the valve port 100 is closed. The left throttle wheel 2 and the right throttle wheel 3 have opposite directions and the same rotation speed. By controlling the rotation angles of the left throttle wheel 2 and the right throttle wheel 3, the open and closed state of the valve port 100 can be controlled.

[0039] Specifically, the left throttle groove 21 is a variable-diameter arc-shaped groove, which has a left upper end 211 and a left lower end 212. Along the direction from the left lower end 212 to the left upper end 211, the groove diameter of the left throttle groove 21 gradually increases from 0. That is, the left upper end 211 is the place where the groove diameter of the left throttle groove 21 is the largest, and the left throttle groove 21 terminates at the left lower end 212.

[0040] See Figure 8A , the right throttle groove 31 is a variable-diameter arc-shaped groove, which has a right upper end 311 and a right lower end 312. Along the direction from the right lower end 312 to the right upper end 311, the groove diameter of the right throttle groove 31 gradually increases from 0. That is, the upper end 311 is the place where the groove diameter of the right throttle groove 31 is the largest, and the right throttle groove 31 terminates at the right lower end 312.

[0041] See Figure 4 and Figure 5 , the left throttle groove 21 and the right throttle groove 31 have the same structural dimensions and are symmetrically arranged. The left throttle groove 21 and the right throttle groove 31 are butted to form a valve port 100. During the process of rotating the left throttle wheel 2 and the right throttle wheel 3, the aperture of the valve port 100 becomes larger or smaller. When the left upper end 211 is butted with the right upper end 311, the aperture of the valve port 100 is the largest. When the left lower end 212 is butted with the right lower end 312, the valve port 100 is closed. The inlet pipe 11 has an inlet passage 110, and the outlet pipe 12 has an outlet passage 120. The inlet passage is communicated with the outlet passage 120 through the valve port 100, and the inlet passage 110 and the outlet passage 120 are symmetric with each other centered on the valve port 100, which can effectively avoid the vibration and noise caused by the refrigerant turning.

[0042] See Figure 3 and Figure 7 , the side of the left throttle wheel 2 has a left side tooth part 22, and the side of the right throttle wheel 3 has a right side tooth part 32. The left side tooth part 22 meshes with the right side tooth part 32 to prevent the left throttle wheel 2 and the right throttle wheel 3 from relatively sliding during use and damaging the symmetric circular valve port structure, thereby enhancing the stability. Preferably, the left side tooth part 22 covers the side of the left throttle groove 21, and the right side tooth part 32 covers the side of the right throttle groove 31, and the tooth parts are set specifically to reduce the processing cost.

[0043] See Figure 8A and Figure 8B , when the refrigerant expansion valve is in the maximum flow state, the valve port 100 is fully opened, and the left upper end 211 is butted with the right upper end 311. See Figure 9A and Figure 9B , the left throttle wheel 2 rotates counterclockwise, the right throttle wheel 3 rotates clockwise, and the rotation angles of the left throttle wheel 2 and the right throttle wheel 3 are the same. At this time, the middle parts of the left throttle groove 21 and the right throttle groove 31 are butted, and the aperture of the valve port 100 decreases, realizing the throttling function, and the throttling effect is adjusted by adjusting the rotation angle. See Figure 10A andFigure 10B The left throttle wheel 2 rotates counterclockwise, and the right throttle wheel 3 rotates clockwise. The left lower end 212 is docked with the left lower end 312. At this time, the valve port 100 is closed, and the refrigerant cannot pass through.

[0044] The present application also provides a refrigeration appliance using the refrigerant expansion valve. The refrigeration appliance has less noise and better user experience.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A refrigerant expansion valve, characterized in that, It includes a housing and two throttle wheels. The throttle wheels are respectively rotatably mounted inside the housing through transmission shafts, and the transmission shafts are in transmission connection with a driving assembly. The two throttle wheels are in contact with each other, and variable-diameter throttle grooves are respectively provided on the side parts of the two throttle wheels; the two throttle grooves are symmetrically arranged, and the two throttle grooves are butted to form a valve port, and the aperture of the valve port changes with the rotation of the two throttle wheels; coaxial inlet pipes and outlet pipes are respectively provided at both ends of the housing, and the inlet pipe and the outlet pipe are both coaxial with the valve port.

2. The refrigerant expansion valve according to claim 1, characterized in that, The two throttle wheels are respectively a left throttle wheel and a right throttle wheel. The left throttle wheel is rotatably mounted inside the housing through a left transmission shaft, and the right throttle wheel is rotatably mounted inside the housing through a right transmission shaft.

3. The refrigerant expansion valve according to claim 2, characterized in that, A left throttle groove is provided on the side part of the left throttle wheel, and a right throttle groove is provided on the side part of the right throttle wheel. The left throttle groove and the right throttle groove are symmetrically arranged, and the left throttle groove and the right throttle groove are butted to form the valve port; the left throttle wheel and the right throttle wheel rotate in opposite directions.

4. The refrigerant expansion valve according to claim 3, characterized in that, The left throttle groove is a variable-diameter arc-shaped groove with a left upper end and a left lower end. Along the direction from the left lower end to the left upper end, the groove diameter of the left throttle groove gradually increases from 0; the right throttle groove is a variable-diameter arc-shaped groove with a right upper end and a right lower end. Along the direction from the right lower end to the right upper end, the groove diameter of the right throttle groove gradually increases from 0; the left throttle groove and the right throttle groove have the same structural dimensions and are symmetrically arranged.

5. The refrigerant expansion valve according to claim 3, characterized in that, A left side tooth part is provided on the side part of the left throttle wheel, and a right side tooth part is provided on the side part of the right throttle wheel. The left side tooth part meshes with the right side tooth part.

6. The refrigerant expansion valve according to claim 5, characterized in that, The left side tooth part covers the side part of the left throttle groove, and the right side tooth part covers the side part of the right throttle groove.

7. The refrigerant expansion valve according to claim 2, wherein The housing is formed by sealing and installing an upper part including the inlet pipe and a lower part including the outlet pipe. The left transmission shaft and the right transmission shaft extend out of the housing through the connection part of the upper part and the lower part.

8. The refrigerant expansion valve according to claim 7, wherein It includes a seal. The seal is arranged inside the housing. The seal is located at the joint of the upper part and the lower part. The seal abuts against the left throttle wheel and the right throttle wheel, and the seal surrounds the left transmission shaft and the right transmission shaft.

9. The refrigerant expansion valve according to claim 2, characterized in that, A left connection hole is provided at the middle axis of the left throttle wheel. The left transmission shaft is inserted into the left connection hole, and a groove for engaging with the left transmission shaft is provided on the side wall of the left connection hole; a right connection hole is provided at the middle axis of the right throttle wheel. The right transmission shaft is inserted into the right connection hole and fixedly connected with the right throttle wheel, and a groove for engaging with the right transmission shaft is provided on the side wall of the right connection hole.

10. A refrigeration appliance, characterized in that, Adopt the refrigerant expansion valve according to any one of claims 1-9.

Images