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CN-117052910-B - Electronic expansion valve and refrigeration equipment

CN117052910BCN 117052910 BCN117052910 BCN 117052910BCN-117052910-B

Abstract

The application relates to an electronic expansion valve and refrigeration equipment, wherein the electronic expansion valve comprises a shell and a nut component arranged on the shell, the nut component comprises a body part, a matching part and a mounting part, the matching part is in press fit with the shell, the mounting part and the matching part are formed by injection molding and insert molding, the matching part comprises a base part and a peripheral part, the base part extends outwards from the circumference of the body part, the peripheral part extends downwards from the base part along the axial direction of the nut component, a hollowed-out part is arranged between the peripheral part and the body part, the nut component further comprises a reinforcing part, at least part of the reinforcing part is positioned in the hollowed-out part, one side of the reinforcing part is connected with the body part, and the other side of the reinforcing part is connected with the peripheral part. The hollowed-out part can reduce the possibility that the body part of the nut component possibly exists in the mounting and dismounting processes and contracts and deforms under the action of pressure, and at least part of the reinforcing part is positioned on the hollowed-out part to increase the strength of the peripheral part, so that the service life of the nut component is prolonged.

Inventors

  • SHEN ZICHENG
  • WEI XIANRANG

Assignees

  • 浙江三花智能控制股份有限公司

Dates

Publication Date
20260512
Application Date
20220505

Claims (9)

  1. 1. The electronic expansion valve is characterized by comprising a shell (2) and a nut assembly (1) arranged on the shell (2), wherein the nut assembly (1) comprises a body part (11), a matching part (12) and an installation part (14), the matching part (12) is in press fit with the shell (2), the installation part (14) and the matching part (12) are formed by injection molding and insert molding, the matching part (12) comprises a base part (121) and a peripheral part (122), the base part (121) extends outwards from the body part (11), the peripheral part (122) extends downwards from the base part (121) along the axial direction of the nut assembly, a preset interval is formed between the peripheral part and the body part, the preset interval forms a hollowed-out part (123), and the installation part (14) is provided with a first balance hole (141); The nut assembly (1) further comprises a reinforcing part (13), at least part of the reinforcing part (13) is positioned on the hollowed-out part (123), one side of the reinforcing part (13) is connected with the body part (11), the other side of the reinforcing part (13) is connected with the peripheral part (122), and the reinforcing part (13) further comprises a second balance hole (133) which is arranged corresponding to the first balance hole (141); along the radial direction of the nut assembly (1), one end of the reinforcing part (13) far away from the body part (11) is provided with a first extension part (131) and a second extension part (132) which are oppositely arranged along the circumferential direction of the nut assembly (1).
  2. 2. The electronic expansion valve according to claim 1, characterized in that a recess is formed between the first extension (131) and the second extension (132), the recess extending in a radial direction of the nut assembly (1) and penetrating the reinforcement (13), the recess forming the second balance hole (133); along the circumferential direction of the nut component (1), two ends of the matching part (12) are respectively connected with the first extension part (131) and the second extension part (132).
  3. 3. Electronic expansion valve according to claim 1, wherein the number of mating parts (12) is plural, and adjacent mating parts (12) are connected by the reinforcing part (13).
  4. 4. The electronic expansion valve according to claim 1, wherein the housing (2) is provided with a second accommodating cavity (21), the nut assembly (1) is mounted in the second accommodating cavity (21), the housing (2) is provided with a liquid inlet (22) and a liquid outlet (23), the second accommodating cavity (21) is communicated with the liquid inlet pipeline (3) through the liquid inlet (22), and the second accommodating cavity (21) is communicated with the liquid outlet pipeline (4) through the liquid outlet (23); The electronic expansion valve further comprises a valve needle (5) and a driving assembly (6), one end of the valve needle (5) is mounted on the nut assembly (1), the other end of the valve needle (5) stretches into the liquid inlet (22) or the liquid outlet (23), and the valve needle (5) can move relative to the nut assembly (1) along the axial direction of the nut assembly (1) so as to control the length of the valve needle (5) stretching into the liquid inlet (22) or the liquid outlet (23); The driving assembly (6) is arranged in the second accommodating cavity (21), and the driving assembly (6) can rotate around the axis of the driving assembly and can drive the valve needle (5) to move.
  5. 5. The electronic expansion valve according to claim 4, characterized in that the fitting portion (12) of the nut assembly (1) abuts against a side wall of the second accommodation chamber (21), and the fitting portion (12) is interference-fitted with the side wall of the second accommodation chamber (21).
  6. 6. The electronic expansion valve according to claim 5, wherein a side wall of the second accommodation chamber (21) is provided with a first fitting groove (241) and a second fitting groove (242) extending in an axial direction of the nut assembly (1), a groove hole diameter of the first fitting groove (241) being larger than a groove hole diameter of the second fitting groove (242); When the nut component (1) is installed on the shell (2), the matching part (12) is in clearance fit or interference fit with the first matching groove (241), and the matching part (12) is in interference fit with the second matching groove (242).
  7. 7. The electronic expansion valve according to claim 6, wherein the fitting portion (12) includes a first fitting section (122 a) fitted with the first fitting groove (241) and a second fitting section (122 b) fitted with the second fitting groove (242), the first fitting section (122 a) has a length L1 in an axial direction of the nut assembly (1), and the second fitting section (122 b) has a length L2, and L1 and L2 are required to satisfy L1. Ltoreq.l2.
  8. 8. The electronic expansion valve according to claim 4, wherein the body portion (11) includes a guide portion (111) and a connecting portion (112), the connecting portion (112) being connected to one end of the guide portion (111) in an axial direction of the nut assembly (1), the guide portion (111) being provided with a first cavity (111 a), the connecting portion (112) being provided with a second cavity (112 a) communicating with the first cavity (111 a), the first cavity (111 a) and the second cavity (112 a) forming a first accommodation cavity (113) penetrating through the nut assembly (1) in the axial direction of the nut assembly (1); the valve needle (5) is mounted on the guide part (111), and the valve needle (5) can move along the side wall of the first cavity (111 a); The driving assembly (6) comprises a rotor (61) and a driving rod (62) which are arranged on the connecting part (112), one end of the driving rod (62) is connected with the rotor (61), the other end of the driving rod (62) stretches into the first cavity (111 a) through the second cavity (112 a) and is connected with the valve needle (5), the rotor (61) can rotate around the axis of the rotor (61), and the rotor (61) can drive the valve needle (5) to move through the driving rod (62).
  9. 9. A refrigeration appliance, the refrigeration appliance comprising: An equipment body; the electronic expansion valve according to any one of claims 1 to 8, wherein the electronic expansion valve is mounted on the device body.

Description

Electronic expansion valve and refrigeration equipment Technical Field The application relates to the technical field of expansion valves, in particular to an electronic expansion valve and refrigeration equipment. Background The electronic expansion valve consists of a shell, a driving assembly, a nut assembly and a valve needle, wherein the driving assembly converts the rotation of the driving assembly into the movement of the valve needle through the nut assembly so as to control the flow of the refrigerant flowing through a liquid inlet or a liquid outlet of the expansion valve, thereby controlling the refrigeration efficiency of the refrigeration equipment. In general, the nut assembly includes a mating portion disposed on the body portion, and the nut assembly is mounted in the housing by press-fitting the mating portion and the housing, and there may be a possibility that the body portion of the nut assembly is deformed by shrinkage under the pressure generated by the press-fitting during the mounting and dismounting process. Disclosure of Invention The application provides an electronic expansion valve and a refrigeration device, which can relatively reduce the possibility of shrinkage deformation of a body part of a nut component. The first aspect of the application provides an electronic expansion valve, which comprises a shell and a nut component arranged on the shell, wherein the nut component comprises a body part, a matching part and a mounting part, the matching part is in press fit with the shell, the mounting part and the matching part are formed by injection molding through an insert, the matching part comprises a base part and a peripheral part, the base part extends outwards from the circumference of the body part, the peripheral part extends downwards from the base part along the axial direction of the nut component, a preset interval is formed between the peripheral part and the body part, the preset interval forms a hollowed-out part, at least part of the reinforcing part is positioned in the hollowed-out part, one side of the reinforcing part is connected with the body part, and the other side of the reinforcing part is connected with the peripheral part. In the application, the hollowed-out part can reduce the possibility of shrinkage deformation of the body part of the nut component under the action of pressure in the mounting and dismounting processes, and the reinforcing part is at least partially positioned at the hollowed-out part, so that the strength of the peripheral part can be increased, the risk of damaging the peripheral part in the press mounting process is reduced, and the service life of the nut component is prolonged. In some embodiments, the mounting portion is provided with a first balance hole and the reinforcing portion includes a second balance hole disposed opposite the first balance hole. In some embodiments, the end of the reinforcement portion, which is far away from the body portion, is provided with a first extension portion and a second extension portion which are arranged oppositely along the circumferential direction of the nut assembly, a concave portion is formed between the first extension portion and the second extension portion, the concave portion extends along the radial direction of the nut assembly and penetrates through the reinforcement portion, the concave portion forms a second balance hole, and two ends of the matching portion are respectively connected with the first extension portion and the second extension portion along the circumferential direction of the nut assembly. In some embodiments, the number of mating portions is a plurality, and adjacent mating portions are connected by a reinforcement portion. In some embodiments, the shell is provided with a second accommodating cavity, the nut component is arranged in the second accommodating cavity, the shell is provided with a liquid inlet and a liquid outlet, the second accommodating cavity is communicated with the liquid inlet pipeline through the liquid inlet, the second accommodating cavity is communicated with the liquid outlet pipeline through the liquid outlet, the electronic expansion valve further comprises a valve needle and a driving component, one end of the valve needle is arranged in the nut component, the other end of the valve needle stretches into the liquid inlet or the liquid outlet, the valve needle can move relative to the nut component along the axial direction of the nut component so as to control the length of the valve needle stretching into the liquid inlet or the liquid outlet, and the driving component is arranged in the second accommodating cavity and can rotate around the axis of the driving component and can drive the valve needle to move. In some embodiments, the mating portion of the nut assembly abuts a sidewall of the second receiving cavity and the mating portion is interference fit with the sidewall of the second receiving cavity. In some embodiments