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CN-224215603-U - Electronic expansion valve and air conditioner

CN224215603UCN 224215603 UCN224215603 UCN 224215603UCN-224215603-U

Abstract

The utility model provides an electronic expansion valve and an air conditioner, wherein the electronic expansion valve comprises a valve body and a valve needle arranged in the valve body, wherein an inflow channel and an outflow channel are formed in the valve body, the inflow channel is communicated with the outflow channel through a valve hole, the valve needle can adjust the opening of the valve hole, the diameter of the valve hole is Dc, and the height of the valve hole in the axial direction of the valve needle is Hc, and 0.25< Hc/Dc <1.5. According to the utility model, the noise of the designed electronic expansion valve can be ensured to be at a lower level by limiting the ratio of the valve hole height Hc of the valve hole to the valve hole diameter Dc, the external dimension of the valve body of the electronic expansion valve is changed less or even not changed, and the manufacturing work requirement is relatively low.

Inventors

  • REN YUXIN
  • LIANG XIANGFEI
  • FANG JINSHENG

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20250513

Claims (11)

  1. 1. The utility model provides an electronic expansion valve, includes valve body (1) and is in needle (2) in valve body (1), be constructed with inflow passageway (11) and outflow passageway (12) in valve body (1), inflow passageway (11) with outflow passageway (12) are through valve opening (13) intercommunication, needle (2) can be adjusted the aperture of valve opening (13), a serial communication port, the diameter of valve opening (13) is Dc, the valve opening (13) is in the axial of valve needle (2) highly be Hc,0.25< Hc/Dc <1.5.
  2. 2. The electronic expansion valve of claim 1, wherein 1.0mm +.Dc +.10.0 mm, and/or 0.1mm +.Hc +.3.0 mm.
  3. 3. Electronic expansion valve according to claim 1, characterized in that the area of the inlet channel (11) abutting the valve opening (13) is an upstream cavity, the diameter of the upstream cavity is D1, the area of the outlet channel (12) abutting the valve opening (13) is a downstream cavity, the diameter of the downstream cavity is D2,2.9 +.d1/Dc +.5.0, and/or 2.9 +.d2/Dc +.5.0.
  4. 4. An electronic expansion valve according to claim 3, wherein the upstream cavity and the downstream cavity are both cone structures with cone angles close to one side of the valve hole (13), the cone angle of the upstream cavity is alpha 1, and the cone angle of the downstream cavity is alpha 2,159.4 degrees less than or equal to alpha 1<180 degrees, 120 degrees less than or equal to alpha 2<180 degrees.
  5. 5. The electronic expansion valve of claim 4, characterized in that α1=160°, α2=160°.
  6. 6. The electronic expansion valve according to claim 1, wherein a filter screen (3) is arranged in the outflow channel (12), and the porosity of the filter screen (3) is epsilon, which is more than or equal to 0.3 and less than or equal to 0.6.
  7. 7. Electronic expansion valve according to claim 6, characterized in that epsilon = 0.38 and/or that the mesh diameter l, wire diameter d and porosity epsilon of the screen (3) satisfy the following formula:
  8. 8. The electronic expansion valve of claim 7, wherein 0.1mm < d < 0.3mm,0.15mm < l < 1.0mm.
  9. 9. The electronic expansion valve according to claim 6, wherein at least two layers of filter screens (3) are arranged in the outflow channel (12), and/or the mesh number of the filter screens (3) is N, and N is not less than 20 meshes and not more than 100 meshes.
  10. 10. Electronic expansion valve according to claim 9, characterized in that the smallest distance between the screen (3) closest to the valve opening (13) and the valve opening (13) is L1,1.0mm +.l1 +.3.0 mm, and/or the distance between two adjacent layers of the screen (3) is L2,0.5mm +.l2.0 mm.
  11. 11. An air conditioner comprising the electronic expansion valve according to any one of claims 1 to 10.

Description

Electronic expansion valve and air conditioner Technical Field The utility model belongs to the technical field of air conditioning, and particularly relates to an electronic expansion valve and an air conditioner. Background With the continuous development of refrigeration technology, the electronic expansion valve gradually replaces the traditional throttling devices such as capillary tubes and the like due to the advantages of high-precision control, quick response and the like, and is widely applied to various refrigeration systems. Taking a refrigeration mode as an example, the refrigerant flows through a condenser to exchange heat with air to form high-temperature and high-pressure refrigerant supercooled liquid, and then passes through an electronic expansion valve, and the pressure of the high-temperature and high-pressure liquid refrigerant flowing through the valve body is suddenly reduced due to the suddenly reduced flow area of the electronic expansion valve, and meanwhile, the phase state is changed. However, since the flow state of the refrigerant changes and the pressure changes in the process are very severe, the phase changes are also very unstable, and the above factors are important influencing factors of flow induced noise. This results in the inevitable generation of noise to varying degrees as the refrigerant flows through the electronic expansion valve, which has a significant negative impact on product promotion and user experience. The conventional electronic expansion valve noise reduction technology mainly comprises a coated damping block, a refrigerant fluid bypass, an optimized valve front and rear pipeline, a newly added noise reduction part in the electronic expansion valve, and the like. The existing means have the problems of poor noise reduction effect, relatively high requirements on manufacturing process and the like. Disclosure of utility model Therefore, the utility model provides the electronic expansion valve and the air conditioner, which can solve the technical problems of poor noise reduction effect and relatively high manufacturing work requirement of the noise reduction design of the electronic expansion valve in the related technology. In order to solve the problems, the utility model provides an electronic expansion valve, which comprises a valve body and a valve needle arranged in the valve body, wherein an inflow channel and an outflow channel are arranged in the valve body, the inflow channel is communicated with the outflow channel through a valve hole, the valve needle can adjust the opening of the valve hole, the diameter of the valve hole is Dc, the height of the valve hole in the axial direction of the valve needle is Hc, and the height of the valve hole in the axial direction of the valve needle is 0.25< Hc/Dc <1.5. In some embodiments, 1.0 mm≤Dc≤10.0 mm, and/or 0.1 mm≤Hc≤3.0 mm. In some embodiments, the region where the inlet passage interfaces with the valve bore is an upstream cavity having a diameter D1, the region where the outlet passage interfaces with the valve bore is a downstream cavity having a diameter D2, 2.9≤D1/Dc≤5.0, and/or 2.9≤D2/Dc≤5.0. In some embodiments, the upstream cavity and the downstream cavity are both cone structures with cone angles close to one side of the valve hole, the cone angle of the upstream cavity is alpha 1, and the cone angle of the downstream cavity is alpha 2,159.4 degrees less than or equal to alpha 1<180 degrees, 120 degrees less than or equal to alpha 2<180 degrees. In some embodiments of the present invention, in some embodiments, α1=160°, α2=160°. In some embodiments, a filter screen is disposed in the outflow channel, wherein the porosity of the filter screen is epsilon, and epsilon is more than or equal to 0.3 and less than or equal to 0.6. In some embodiments, ε=0.38, and/or the mesh diameter l, wire diameter d, and the porosity ε of the filter screen satisfy the following equation: In some embodiments, 0.1 mm≤d≤0.3 mm,0.15 mm≤l≤1.0 mm. In some embodiments, at least two layers of filter screens are arranged in the outflow channel, and/or the mesh number of the filter screens is N, and N is more than or equal to 20 and less than or equal to 100. In some embodiments, the minimum distance between the filter screen nearest to the valve hole and the valve hole is L1, L1 is less than or equal to 1.0mm and less than or equal to 3.0mm, and/or the distance between two adjacent layers of filter screens is L2, and L2 is less than or equal to 0.5mm and less than or equal to 2.0mm. The utility model also provides an air conditioner comprising the electronic expansion valve. The electronic expansion valve and the air conditioner provided by the utility model have the following beneficial effects: The noise of the designed electronic expansion valve can be ensured to be at a lower level by limiting the ratio of the valve hole height Hc of the valve hole to the valve hole diameter Dc, the external dimension of the valv