CN220378907U

CN220378907U - Split electromagnetic driving type electronic expansion valve with signal feedback

Info

Publication number: CN220378907U
Application number: CN202321823382.9U
Authority: CN
Inventors: 李江; 陆新宇; 史云龙; 卢世军; 李志凯
Original assignee: SUZHOU XINZHI ELECTRO-MECHANICAL INDUSTRIES CO LTD
Current assignee: SUZHOU XINZHI ELECTRO-MECHANICAL INDUSTRIES CO LTD
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2024-01-23
Anticipated expiration: 2033-07-12

Abstract

The utility model relates to the technical field of automobile air conditioners and discloses a split electromagnetic drive type electronic expansion valve with signal feedback, which comprises a valve body with a valve port, wherein an electromagnetic drive mechanism and an opening detection mechanism are arranged above the valve body; the opening detection mechanism comprises an induction part and a movable part, a junction box assembly is arranged above the electromagnetic driving mechanism, and a sealing cover is arranged inside the junction box assembly; the electromagnetic driving mechanism is internally provided with a guide sleeve; one end of the movable part is positioned in the guide sleeve, and the other end of the movable part passes through the top end of the guide sleeve to the inside of the sealing cover. The top of the guide sleeve is opened, one end of the movable part of the opening detection mechanism is led out to the outside of the upper end of the guide sleeve, and the service length of the guide sleeve can be shortened through the structure, so that the problem that the manufacturing and assembling difficulties are high due to the fact that the guide sleeve structure is too slender in the prior art is solved.

Description

Split electromagnetic driving type electronic expansion valve with signal feedback

Technical Field

The utility model relates to the technical field of automobile air conditioners, in particular to a split electromagnetic driving type electronic expansion valve with signal feedback.

Background

Systems requiring more accurate evaporator superheat control, such as automotive heat pump systems, have been used in some situations where the load is highly variable or the operating conditions are wide; traditional throttling elements such as capillaries and thermal expansion valves cannot meet the requirements of comfort and energy conservation, and based on the traditional throttling elements, electronic expansion valves are increasingly widely applied in combination with compressor variable capacity technology.

Existing electronic expansion valves for automotive air conditioning systems generally fall into two categories: the motor drive and the electromagnetic drive are adopted respectively; the electromagnetic driven electronic expansion valve has the characteristics of quick valve opening action, simple structure, low working noise and high reliability; in order to facilitate more accurate control of the valve opening, a corresponding valve opening detection mechanism can be arranged on the expansion valve, but after the valve opening detection mechanism is added, a required guide sleeve structure is too slender, and the problems of high manufacturing and assembling difficulties are caused.

Disclosure of Invention

The utility model aims to solve the problem of providing a split electromagnetic driving type electronic expansion valve with signal feedback, wherein a part of a valve port opening detection mechanism is led out of the upper end of a guide sleeve and a sealing cover is added through a hole formed in the top of the guide sleeve structure, so that the aim of shortening the length of the guide sleeve structure is fulfilled.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the split electromagnetic driving type electronic expansion valve with signal feedback comprises a valve body with a valve port, wherein an electromagnetic driving mechanism and an opening detection mechanism for respectively controlling and detecting the opening of the valve port are arranged above the valve body; the opening detection mechanism comprises an induction part and a movable part, a junction box assembly for wiring is arranged above the electromagnetic driving mechanism, a sealing cover is arranged inside the junction box assembly, the sealing cover is abutted to the upper side of the electromagnetic driving mechanism, and a guide sleeve is arranged inside the electromagnetic driving mechanism; the induction part is arranged at the top of the junction box assembly, one end of the movable part is positioned in the guide sleeve, and the other end of the movable part penetrates through the top end of the guide sleeve to the inside of the sealing cover.

In a preferred embodiment of the utility model, an axial channel is axially arranged on the valve body, the bottom of the axial channel is connected with a valve cavity, a valve core is movably arranged in the axial channel in a penetrating way, and one end of the valve core penetrates through the axial channel and forms the valve port with the bottom of the axial channel; and the valve body is also provided with an air inlet channel which is communicated with the axial channel and an air outlet which is communicated with the valve cavity.

In a preferred embodiment of the present utility model, the electromagnetic driving mechanism includes a housing, and a fixed iron core is fixedly disposed in the housing; the guide sleeve is covered on the outer side of the fixed iron core, an electromagnetic coil assembly is arranged on the outer portion of the guide sleeve in a surrounding mode, and a movable iron core is movably arranged in the guide sleeve; the movable iron core is located above the fixed iron core, the movable part is mounted on the fixed iron core, a valve rod is fixedly connected to the lower portion of the movable iron core, and one end of the valve rod penetrates through the fixed iron core and is fixedly connected with the valve core.

In a preferred embodiment of the present utility model, the movable part of the opening detection mechanism includes a fixed seat disposed on the movable iron core, one end of the fixed seat passes through the guide sleeve to the inside of the sealing cover, and a permanent magnet is embedded at the top of the end; the induction part comprises a magnetic field detection assembly capable of detecting the magnetic field change of the permanent magnet, and the magnetic field detection assembly is arranged at the top of the junction box assembly.

In a preferred embodiment of the utility model, a supporting component for supporting the valve core is arranged in the valve cavity, and a limiting spring is arranged between the fixing seat and the top of the sealing cover.

In a preferred embodiment of the utility model, the support assembly comprises a spring seat screwed at the bottom of the valve cavity, a support seat contacting with the valve core is arranged above the spring seat, and a support spring is arranged between the support seat and the spring seat.

In a preferred embodiment of the utility model, a cavity is arranged at the top of the axial channel, and an air guide channel which is communicated with the valve cavity and the cavity is arranged on the valve body.

In a preferred embodiment of the present utility model, a first sealing ring is disposed between the guide sleeve and the cover, and a second sealing ring is disposed between the housing and the junction box assembly.

The utility model solves the defects existing in the background technology, and has the beneficial effects that:

(1) According to the utility model, the top of the guide sleeve is opened, one end of the movable part of the opening detection mechanism is led out of the upper end of the guide sleeve, and the cover is arranged to isolate the movable part from the junction box assembly, so that the service length of the guide sleeve can be shortened through the structure, and the problem of high manufacturing and assembling difficulty caused by excessively slender guide sleeve structure in the prior art is solved.

(2) In the utility model, the valve core is directly pushed to move by the electromagnetic force generated by the electromagnetic driving mechanism to control the opening of the valve port, and the rotating movement of the motor is not required to be converted into the linear movement of the valve rod, so that the valve port opening response speed is high, and the noise is low; also because simple structure does not have the rotating assembly and the screw drive pair of motor, electromagnetic drive's reliability is higher, and the fault rate is also lower, can not lead to control accuracy to drop because of the screw wearing and tearing.

(3) In the utility model, the magnetic field detection assembly is adopted to induce the change of the displacement magnetic field of the permanent magnet at the upper end of the movable iron core, so that the change of the opening of the valve port can be transmitted to the air conditioner control system through an electric signal, and the accurate control of the opening of the valve port and fault alarm are realized.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic view of the construction of a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of a valve body according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of the air guide channel according to the preferred embodiment of the present utility model;

wherein, 1, the valve body; 101. an axial passage; 102. an air intake passage; 103. a valve cavity; 104. an air outlet; 150. a support assembly; 151. a support; 152. a spring seat; 153. a support spring; 2. a valve core; 201. a valve stem; 3. an electromagnetic drive mechanism; 301. a housing; 302. an electromagnetic coil assembly; 303. fixing an iron core; 304. a movable iron core; 4. guide sleeve; 5. an opening degree detecting mechanism; 501. a fixing seat; 502. a permanent magnet; 503. a magnetic field detection assembly; 6. a junction box assembly; 7. a cover; 8. a first seal ring; 9. a second seal ring; 10. an air guide channel; 11. and a limit spring.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and examples, which are simplified schematic illustrations of the basic structure of the utility model, which are presented only by way of illustration, and thus show only the structures that are relevant to the utility model.

As shown in fig. 1-3, a split electromagnetic driving type electronic expansion valve with signal feedback comprises a valve body 1, wherein an axial channel 101 is axially formed in the valve body 1, the bottom of the axial channel 101 is connected with a valve cavity 103, a valve core 2 is movably arranged in the axial channel 101 in a penetrating manner, and one end of the valve core 2 penetrates through the axial channel 101 and forms a valve port with the bottom of the axial channel 101; the valve body 1 is also provided with an air inlet passage 102 penetrating through the axial passage 101 and an air outlet 104 communicated with the valve cavity 103. Specifically, the air inlet channel 102 is connected with an exhaust pipeline of the compressor, and the air outlet 104 is connected with a pipeline of the evaporator (or condenser); the lower part of the valve core 2 is provided with a conical surface, the bottom of the axial channel 101 is provided with a round angle, and the sealing of the valve port adopts a line sealing mode that the conical surface contacts with the round angle; after the valve port is opened, air flow enters the valve cavity 103 from the air inlet channel 102 along the axial channel 101 and is discharged through the air outlet 104; in the process, the opening of the valve port can be controlled by the axial displacement of the valve core 2 along the axial channel 101, and the taper of the conical surface of the valve core 2 is related to the curve requirement of flow opening. And the valve core 2 and the axial channel 101 of the valve body 1 are sealed by adopting a sealing ring, so that gas in the air inlet channel 102 cannot enter the upper space of the valve body 1, and the risk of clamping stagnation caused by impurity flow in the refrigerant is reduced.

The axial passage 101 has a cavity at its top, and the valve body 1 has an air guide passage 10 communicating the valve cavity 103 with the cavity. The air guide channel 10 is communicated with the valve cavity 103 and the cavity, the cavity is communicated with the axial channel 101, and the axial channel 101 is communicated with the air inlet channel 102, so that the air guide channel 10 is actually communicated with the air inlet and the air outlet 104, and the air pressure born by the upper end and the lower end of the valve core 2 is the same because the cavity is positioned at the upper part of the valve core 2, thereby ensuring the dynamic balance of the valve core 2 and ensuring the stable running of the valve core 2 when the valve core moves.

Further, an electromagnetic driving mechanism 3 for controlling the opening of the valve port is arranged above the valve body 1; the electromagnetic driving mechanism 3 comprises a shell 301, and a fixed iron core 303 is fixedly arranged in the shell 301; the guide sleeve 4 is covered on the outer side of the fixed iron core 303, an electromagnetic coil assembly 302 is arranged on the outer ring of the guide sleeve 4, and a movable iron core 304 is movably arranged in the guide sleeve 4; the movable iron core 304 is located above the fixed iron core 303, the lower part of the movable iron core 304 is fixedly connected with the valve rod 201, and one end of the valve rod 201 penetrates through the fixed iron core 303 to be fixedly connected with the valve core 2. Specifically, the electromagnetic coil assembly 302 is composed of a coil bracket and a wire wound on the bracket, when the wire is electrified, a larger magnetic field is generated on the fixed iron core 303 inside the wire, and a larger acting force can be generated on the movable iron core 304 through the magnetic field, so that the movable iron core 304 moves downwards along the guide sleeve 4, and the valve core 2 is driven to move in the axial channel 101 through the valve rod 201, so that the purposes of controlling the opening and the closing of the valve port and the opening degree are achieved.

Above the electromagnetic driving mechanism 3, a junction box assembly 6 for wiring is installed, a sealing cover 7 is installed inside the junction box assembly 6, and the sealing cover 7 is abutted against the upper end of a housing 301 of the electromagnetic driving mechanism 3; the main function of the junction box assembly 6 is to provide a junction port for the electric appliance of the device so that the junction box assembly can be normally communicated with an external system; wherein, a first sealing ring 8 is arranged between the guide sleeve 4 and the sealing cover 7 as well as between the shell 301 and the junction box assembly 6, and a second sealing ring 9 is arranged between the shell 301 and the junction box assembly 6; the first sealing ring 8 and the second sealing ring 9 are O-shaped sealing rings preferentially, and the purpose of the O-shaped sealing rings is to ensure tightness among the shell 301, the junction box assembly 6, the sealing cover 7 and the guide sleeve 4.

Further, an opening detection mechanism 5 for detecting the opening of the valve port is further arranged above the valve body 1, the opening detection mechanism 5 comprises an induction part and a movable part, wherein the induction part is arranged at the top of the junction box assembly 6, one end of the movable part is positioned in the guide sleeve 4 and is connected with the movable iron core 304, and the other end of the movable part passes through the top end of the guide sleeve 4 to the inside of the sealing cover 7; by opening the top of the guide sleeve 4, one end of the movable part of the opening detection mechanism 5 is led out of the upper end of the guide sleeve 4, the service length of the guide sleeve 4 can be shortened, and the problem that the guide sleeve 4 is too slender in structure and difficult to manufacture and assemble at present is solved.

Specifically, the movable part includes a fixed seat 501 disposed on the movable iron core 304, one end of the fixed seat 501 passes through the guide sleeve 4 to the inside of the sealing cover 7, and the top of the end is embedded with a permanent magnet 502; the sensing part includes a magnetic field detecting member 503 capable of detecting a change in the magnetic field of the permanent magnet 502, and the magnetic field detecting member 503 is provided at the top of the junction box member 6. The magnetic field detection component 503 may specifically be composed of a linear hall sensor WSH138, a dual-channel amplifier LM358, an adjustable potentiometer, a red LED lamp, a patch capacitor 100nF, etc., so as to detect the magnetic field carried by the permanent magnet 502 itself; the permanent magnet 502 moves synchronously with the movable iron core 304, and after the movable iron core moves, the magnetic field detection assembly 503 can measure the variation of the magnetic field, and the actual moving distance is judged according to the variation, so as to obtain the actual opening of the valve port; the structure can transmit the opening change of the valve port to an air conditioner control system through an electric signal, and accurate control and fault alarm of the opening of the valve port are realized.

A supporting component 150 for supporting the valve core 2 is arranged in the valve cavity 103, and a limiting spring 11 is arranged between the fixed seat 501 and the top of the sealing cover 7. An elastic movement assembly is formed between the valve core 2 and the supporting assembly 150, the limiting spring 11, the fixing seat 501 and other components, and the assembly interacts with electromagnetic force generated by the electromagnetic coil assembly 302; based on the existence of the air guide channel 10, the air pressures received by the two ends of the valve core 2 are balanced, so that the valve core 2 only receives the action of spring force and electromagnetic force in the moving process.

The support assembly 150 includes a spring seat 152 screwed to the bottom of the valve cavity 103, a support 151 contacting the valve core 2 is disposed above the spring seat 152, and a support spring 153 is disposed between the support 151 and the spring seat 152; based on this, the initial state of the valve port is a closed state under the action of the support assembly 150; the spring seat and 152 are fixed with the valve body 1 by interference fit or screw fit, and the valve opening current setting of the electronic expansion valve can be controlled by adjusting the pressing-in amount of the spring seat 152.

The disclosed technical scheme is utilized to execute the work of controlling and detecting the opening of the flow valve port of the electronic expansion valve, and the specific working principle is as follows:

in the initial state, under the action of the supporting spring 153 of the supporting assembly 150, the valve port for controlling the flow from the air inlet channel 102 to the air outlet 104 is in a closed state, and the opening of the valve port can be opened through the movement of the valve core 2; when the electromagnetic coil assembly 302 is electrified, the movable iron core 304 moves downwards and pushes the valve core 2 to move downwards through the valve rod 201, and the current intensity passing through the electromagnetic coil assembly 302 determines the magnitude of electromagnetic force and the downward displacement of the valve core 2 so as to control the opening of the valve port and ensure the stability of the output flow of the main valve port of the electronic expansion valve under the set current.

Also, the displacement of the movable iron core 304 causes the magnetic field intensity between the permanent magnet 502 and the magnetic field detection assembly 503 to change, and after the sensing circuit of the magnetic field detection assembly 503 detects the change amount of the magnetic field, the signal is transmitted through the control circuit.

In summary, the electronic expansion valve with the structure can directly output the displacement of the valve core 2 through signals, so that an air conditioning system can conveniently identify the actual working state of the valve port, and the accurate control and fault alarm of the electronic expansion valve are realized; and the top of the guide sleeve 4 is opened, so that one end of the movable part of the opening degree detection mechanism 5 is led out of the upper end of the guide sleeve 4, and the cover 7 is arranged to isolate the movable part from the junction box assembly 6, so that the service length of the guide sleeve 4 can be shortened, and the problem that the manufacturing and assembling difficulties are high due to the fact that the guide sleeve 4 is too slender in structure at present is solved.

The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a split type electromagnetic drive formula electronic expansion valve of taking signal feedback which characterized in that: the valve comprises a valve body (1) with a valve port, wherein an electromagnetic driving mechanism (3) and an opening detection mechanism (5) for respectively controlling and detecting the opening of the valve port are arranged above the valve body (1); the opening detection mechanism (5) comprises an induction part and a movable part, a junction box assembly (6) for wiring is arranged above the electromagnetic driving mechanism (3), a sealing cover (7) is arranged inside the junction box assembly (6), the sealing cover (7) is abutted to the upper part of the electromagnetic driving mechanism (3), and a guide sleeve (4) is arranged inside the electromagnetic driving mechanism (3); the induction part is arranged at the top of the junction box assembly (6), one end of the movable part is positioned in the guide sleeve (4), and the other end of the movable part penetrates through the top end of the guide sleeve (4) to the inside of the sealing cover (7).

2. The split signal feedback solenoid actuated electronic expansion valve of claim 1, wherein: an axial channel (101) is formed in the valve body (1) along the axial direction, the bottom of the axial channel (101) is connected with a valve cavity (103), a valve core (2) is movably arranged in the axial channel (101) in a penetrating mode, and one end of the valve core (2) penetrates through the axial channel (101) and forms the valve port with the bottom of the axial channel; the valve body (1) is also provided with an air inlet channel (102) communicated with the axial channel (101) and an air outlet (104) communicated with the valve cavity (103).

3. The split, signal fed, electromagnetically driven electronic expansion valve of claim 2, wherein: the electromagnetic driving mechanism (3) comprises a shell (301), and a fixed iron core (303) is fixedly arranged in the shell (301); the guide sleeve (4) is covered on the outer side of the fixed iron core (303), an electromagnetic coil assembly (302) is arranged on the outer ring of the guide sleeve (4), and a movable iron core (304) is movably arranged in the guide sleeve (4); the movable iron core (304) is located above the fixed iron core (303), the movable part is mounted on the fixed iron core (303), the lower part of the movable iron core (304) is fixedly connected with the valve rod (201), and one end of the valve rod (201) penetrates through the fixed iron core (303) and is fixedly connected with the valve core (2).

4. The split, signal fed, electromagnetically driven electronic expansion valve of claim 3, wherein: the movable part of the opening detection mechanism comprises a fixed seat (501) arranged on the movable iron core (304), one end of the fixed seat (501) penetrates through the guide sleeve (4) to the inside of the sealing cover (7), and a permanent magnet (502) is embedded at the top of the end; the induction part comprises a magnetic field detection component (503) capable of detecting the magnetic field change of the permanent magnet (502), and the magnetic field detection component (503) is arranged at the top of the junction box component (6).

5. The split signal feedback solenoid actuated electronic expansion valve of claim 4, wherein: a supporting component (150) for supporting the valve core (2) is arranged in the valve cavity (103), and a limit spring (11) is arranged between the fixing seat (501) and the top of the sealing cover (7).

6. The split signal feedback solenoid actuated electronic expansion valve of claim 5, wherein: the support assembly (150) comprises a spring seat (152) screwed at the bottom of the valve cavity (103), a support (151) in contact with the valve core (2) is arranged above the spring seat (152), and a support spring (153) is arranged between the support (151) and the spring seat (152).

7. The split, signal fed, electromagnetically driven electronic expansion valve of claim 6, wherein: the top of the axial channel (101) is provided with a cavity, and the valve body (1) is provided with an air guide channel (10) which is communicated with the valve cavity (103) and the cavity.

8. The split signalled electronic expansion valve of any of claims 3-7, wherein: a first sealing ring (8) is arranged between the guide sleeve (4) and the sealing cover (7) and between the casing (301), and a second sealing ring (9) is arranged between the casing (301) and the junction box assembly (6).