CN111237523A - Electrically operated valve and thermal management assembly - Google Patents
Electrically operated valve and thermal management assembly Download PDFInfo
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- CN111237523A CN111237523A CN201811435988.9A CN201811435988A CN111237523A CN 111237523 A CN111237523 A CN 111237523A CN 201811435988 A CN201811435988 A CN 201811435988A CN 111237523 A CN111237523 A CN 111237523A
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- Prior art keywords
- circuit board
- valve body
- conductive
- valve
- electrically operated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
An electric valve and a heat management assembly are provided, the electric valve comprises a valve body, a valve core, a rotor assembly, a stator assembly and a circuit board, the electric valve is provided with a valve port, the rotor assembly can drive the valve core to move relative to the valve port, and the valve core can move relative to the valve port and adjust the opening of the valve port; the electric valve also comprises a conduction piece, the conduction piece and the valve body can conduct electricity, at least part of the conduction piece is arranged between the circuit board and the valve body, at least part of the conduction piece is electrically connected with a reference stratum of the circuit board, at least part of the conduction piece is in contact with the valve body, and the reference stratum of the circuit board and the valve body can conduct electricity through the conduction piece; this is advantageous in reducing the influence of static electricity on the electric valve, and is advantageous in improving the electromagnetic compatibility of the electric valve.
Description
Technical Field
The invention relates to the technical field of fluid control, in particular to a thermal management assembly and an electric valve.
Background
In a refrigeration system, an electric valve is mainly used for adjusting the flow rate of refrigerant. With the improvement of the requirement on the flow control accuracy, the electrically operated valve is gradually applied to an automobile air conditioning system, a heat pump system and a battery cooling system.
The electric valve comprises a stator component and a circuit board, the stator component is electrically connected with the circuit board, and the circuit board is provided with electronic components; in general, in the use of an electrically operated valve, static electricity is generated in an external system or the electrically operated valve itself, and the static electricity affects the performance and use of electronic components, and further affects the use of the electrically operated valve.
Disclosure of Invention
The invention aims to provide an electric valve which is beneficial to reducing the influence of static electricity on the electric valve and further beneficial to improving the electromagnetic compatibility of the electric valve.
In order to achieve the above purpose, one embodiment of the present invention adopts the following technical solutions:
an electrically operated valve comprises a valve body, a valve core, a rotor assembly, a stator assembly and a circuit board, wherein the electrically operated valve is provided with a valve port, the rotor assembly can drive the valve core to move, and the valve core can move relative to the valve port; the stator assembly is positioned on the periphery of the rotor assembly and is electrically connected with the circuit board; the electrically operated valve further comprises a conductive element, the conductive element and the valve body are capable of conducting electricity, at least part of the conductive element is arranged between the circuit board and the valve body, at least part of the conductive element is electrically connected with a reference stratum of the circuit board, at least part of the conductive element is in contact with the valve body, and the reference stratum of the circuit board is electrically conducted with the valve body through the conductive element.
A heat management assembly comprises an electric valve and a heat exchanger, wherein the electric valve is fixedly connected with the heat exchanger and is the electric valve.
The technical scheme of this embodiment provides an motorised valve and thermal management subassembly, including the conduction piece, at least partial conduction piece sets up between circuit board and valve body, and the conduction piece can electrically conduct with the valve body, and at least partial conduction piece contacts with the circuit board, and at least partial conduction piece is connected with the reference stratum electricity of circuit board, can carry out the electricity through the conduction piece between the reference stratum of circuit board and the valve body, is favorable to exporting static from the valve body like this, and then is favorable to reducing the influence of static to the motorised valve to be favorable to improving the electromagnetic compatibility of motorised valve.
Drawings
FIG. 1 is a schematic block diagram of one embodiment of a refrigeration system;
FIG. 2 is a schematic structural diagram of one embodiment of a thermal management assembly;
figure 3 is a schematic view of a directional three-dimensional structure of the electric valve in the technical scheme;
figure 4 is a schematic front view of the electrically operated valve of figure 3;
figure 5 is a schematic cross-sectional view of the electrically operated valve of figure 4 taken along line B-B;
figure 6 is a schematic cross-sectional view of the electrically operated valve of figure 3 taken along line a-a;
FIG. 7 is a schematic perspective view of the valve body of FIGS. 3-6 in one direction;
FIG. 8 is a schematic elevational view of the valve body of FIG. 7 in one orientation;
figure 9 is a schematic cross-sectional view of the electrically operated valve of figure 8 taken along the direction C-C;
figure 10 is a cross-sectional view of the electrically operated valve of figure 8 taken along line D-D;
fig. 11 is a schematic perspective view of the valve body, the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 6 combined together according to a first embodiment;
FIG. 12 is a perspective view of the conductive element of FIG. 11;
fig. 13 is a perspective view of the circuit board, the first pin, the second pin and the third pin of fig. 11;
fig. 14 is a schematic perspective view of a second embodiment of the valve body, the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 6 combined together;
FIG. 15 is a perspective view of the conductive element of FIG. 14;
fig. 16 is a perspective view of the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 14;
fig. 17 is a schematic perspective view of a third embodiment of the valve body, the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 6 combined together;
fig. 18 is a perspective view of the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 17 combined together;
FIG. 19 is a schematic perspective view of the conductive element of FIG. 17 or 18;
fig. 20 is a schematic perspective view of a fourth embodiment of the valve body, the circuit board, the first pin, the second pin, the third pin and the conductor in fig. 6 combined together;
fig. 21 is a perspective view of the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 20;
FIG. 22 is a schematic perspective view of the conductive element of FIG. 20 or 21;
fig. 23 is a schematic perspective view of a fifth embodiment of the valve body, the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 6 combined together;
FIG. 24 is a schematic perspective view of the conductive portion of FIG. 23;
fig. 25 is a schematic perspective view of the circuit board, the first pin, the second pin, the third pin and the conductive part of fig. 23 combined together;
FIG. 26 is a perspective view of the support portion of FIG. 23;
fig. 27 is a schematic perspective view of a sixth embodiment of the valve body, the circuit board, the first pin, the second pin, the third pin and the conductive member of fig. 6 combined together;
FIG. 28 is a schematic illustration of an exploded structure of FIG. 27;
FIG. 29 is a schematic perspective view of the conductive portion of FIG. 27 or 28;
FIG. 30 is a schematic perspective view of the support portion of FIG. 27 or 28;
fig. 31 is a schematic perspective view of the circuit board, the first pin, the second pin, the third pin and the conductive part in fig. 27 or fig. 28;
FIG. 32 is a schematic elevation view of the structure of FIG. 27;
fig. 33 is a schematic cross-sectional view taken along the direction E-E in fig. 32.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention is further described with reference to the following figures and detailed description:
in a refrigeration system, an electric valve controls the flow rate of refrigerant, and controls the superheat degree of the system by adjusting the flow rate of refrigerant, and the electric valve controls the opening degree based on an electric signal to control the flow rate of refrigerant. In order to improve the accuracy of controlling the flow rate, electrically operated valves have been used as throttle elements in the fields of automobile air conditioning systems, heat pump systems, battery cooling systems, and the like.
Fig. 1 is a schematic block diagram of an embodiment of a refrigeration system, in this embodiment, the refrigeration system includes an air conditioning system and a battery cooling system, the air conditioning system includes a compressor 100, a condenser 200, a first electric valve 1, and an evaporator 300; when the air conditioning system works, the refrigerant is compressed into a high-temperature high-pressure refrigerant through the compressor 100, the high-temperature high-pressure refrigerant is radiated through the condenser 200 to become a normal-temperature high-pressure refrigerant, and the normal-temperature high-pressure refrigerant enters the evaporator 300 through the first electric valve 1; since the pressure of the normal-temperature and high-pressure refrigerant is reduced after passing through the first electric valve 1, the refrigerant is vaporized and changed into a low-temperature refrigerant, and the low-temperature refrigerant absorbs a large amount of heat through the evaporator 300 and is changed into the refrigerant and returns to the compressor 100; the battery cooling system comprises a thermal management assembly, and refrigerant in the air conditioning system exchanges heat with working medium of the battery cooling system in the thermal management assembly.
Fig. 2 is a schematic structural diagram of an embodiment of a thermal management assembly, in this embodiment, a thermal management assembly 400 includes a heat exchanger 500 and a second electric valve 2, the heat exchanger 500 and the second electric valve 2 are integrated into a whole, and a refrigerant in an air conditioning system exchanges heat with a working medium of a battery cooling system in the heat exchanger 500, in this embodiment, the structure of the first electric valve 1 is the same as that of the second electric valve 2, and the first electric valve 1 and the second electric valve 2 are collectively described as electric valves. Of course, the first electrically operated valve and the second electrically operated valve may have different structures, or the battery cooling system does not use an electrically operated valve, and it is within the scope of the present disclosure that one of the first electrically operated valve and the second electrically operated valve is the same as the electrically operated valve of the present disclosure.
Referring to fig. 3 to 6, the electric valve 1 includes a valve body 11, a valve seat 12, a valve core 13, a rotor assembly 14, a stator assembly 15 and a circuit board 16, wherein the valve seat 12 forms a valve port 120, the stator assembly 15 is located at the periphery of the rotor assembly 14, and the stator assembly 15 and the circuit board 16 are electrically and/or signal connected; in this embodiment, a sleeve 19 is disposed between the stator assembly 15 and the rotor assembly 14 to isolate the stator assembly 15 from the rotor assembly 14, and the stator assembly 15 is electrically and/or signal connected to the circuit board 16; when the electric valve 1 works, the current in the winding passing through the stator assembly 15 is controlled to change according to a preset rule, so that the stator assembly 15 is controlled to generate a changing excitation magnetic field, the rotor assembly 14 rotates under the action of the excitation magnetic field, and the rotor assembly 14 can drive the valve core 13 to move relative to the valve seat 12 and adjust the opening degree of the valve port 120.
Referring to fig. 3 to 9, the valve body 11 includes a first mounting portion 111 and a first flow passage 112, the first flow passage 112 can be flowed through by the working medium, the first mounting portion 111 has a first cavity 1110, the first cavity 1110 communicates with the first flow passage 112, and referring to fig. 4 and 5, at least a part of the valve port 120 is located in the first cavity 1110, in this embodiment, the first flow passage 112 is composed of flow passages with different apertures, and of course, the first flow passage 112 may also be composed of flow passages with the same aperture; referring to fig. 4 and 5, the electric valve 1 further includes a fixing member 17, the sleeve 19 covers the periphery of the rotor assembly 15, the sleeve 19 is welded and fixed to the fixing member 17, and the valve seat 12 is fixedly connected to the fixing member 17, that is, the sleeve 19 and the valve seat 12 are connected by the fixing member 17, which is beneficial to simplifying the mold, miniaturizing the mold, and facilitating the forming process of the valve seat 12; of course, the fixing member 17 may be formed integrally with the valve seat 12, so that the connection between the fixing member and the valve seat is not required; in this embodiment, the valve port 120 is communicated with the first flow channels 112 located at two sides of the valve port 120, and the valve element 13 changes the flow cross-sectional area of the first flow channel 112 at the valve port 120 by approaching and departing from the valve port 120, so as to form a throttling at the valve port 120.
Referring to fig. 3 to 9, the valve body 11 further includes a second mounting portion 113 and a second flow passage 114, the second mounting portion 113 has a second cavity 1130, the second cavity 1130 communicates with the second flow passage 114, the electric valve 1 further includes a sensor 50, at least a portion of the sensor 50 is located in the second cavity 1130, and the sensor 50 is electrically and/or signally connected to the circuit board 16; in the invention, the sensor 50 is arranged, so that the electric valve can detect parameters such as temperature and/or pressure of a working medium in a system, the parameters are fed back to the circuit board, and then the circuit board adjusts the opening of the electric valve according to a corresponding control program.
Referring to fig. 11, the electric valve 1 further includes a first pin 31, a second pin 32 and a third pin 33, the first pin 31 is a ground terminal of the electric valve 1, the second pin 32 is a power terminal of the electric valve 1, the third pin 33 is a communication terminal of the electric valve 1, and the first pin 31, the second pin 32 and the third pin 33 are fixedly connected to the circuit board 16; in the present invention, the electric valve 1 further includes a conductive element 20, the conductive element 20 and the valve body 11 are capable of conducting electricity, at least a portion of the conductive element 20 is disposed between the circuit board 16 and the valve body 11, at least a portion of the conductive element 20 is in contact with the circuit board 16, at least a portion of the conductive element 20 is in contact with a reference ground of the circuit board 16, and electricity can be conducted between the reference ground of the circuit board 16 and the valve body 11 through the conductive element 20; therefore, static electricity can be led out of the valve body 11, the influence of the static electricity on the electric valve can be reduced, and the electromagnetic compatibility of the electric valve can be improved; the reference ground layer of the circuit board 16 in the present invention may be a copper clad layer (not shown) of the circuit board 16; the structures of the six embodiments of the above-described conductive element will be explained below, and for convenience of describing the conductive elements of the six embodiments, the conductive element of the first embodiment is labeled as the conductive element 20, and other reference numerals are not suffixed; the conductor of the second embodiment is labeled as conductor 20a, with the other numbers suffixed with a; the conductive element of the third embodiment is labeled conductive element 20b, with the other numbers suffixed with b; the conductor of the fourth embodiment is labeled as support 20c, with the other numbers suffixed with c; the fifth embodiment has the conductive element designated support 20d, the other numbers being suffixed with d; the sixth embodiment has the conductive element labeled as support 20e, with the remaining reference numerals suffixed with e.
Referring to fig. 11 to 13, fig. 11 is a schematic structural view of a first embodiment of the combination of a valve body, a circuit board, a conductive element and a sensor in the present invention, fig. 12 is a schematic structural view of the conductive element in fig. 10, and fig. 13 is a schematic structural view of the combination of the conductive element, a first pin, a second pin, a third pin and the conductive element; the structure of the first embodiment of the guide will be described in detail below.
Referring to fig. 11 to 13, in this embodiment, the conductive element 20 is fixedly connected to the valve body 11, specifically, in conjunction with fig. 7, the valve body 11 is formed with a connection hole 115, the connection hole 115 extends from the upper surface of the valve body 11 to a direction away from the upper surface of the valve body 11, the conductive element 20 includes a matching portion 201 and an upper portion 202, the upper portion 202 is integrally formed with the matching portion 201, the matching portion 201 is tightly fitted to the connection hole 115 of the valve body, and the upper surface 2021 of the upper portion 202 abuts against the circuit board 16, in this embodiment, the matching portion 201 is tightly fitted to the connection hole 115 in an interference fit or a transition fit, of course, the matching portion 201 may also be connected to the connection hole 115 of the valve body by a screw thread, at this time, the matching portion 201 is formed with an external thread, the connection hole 115 is formed with an internal thread, the two threads cooperate to achieve the fixed connection, when, this is advantageous for saving the manufacturing cost; in addition, the material of the conducting piece 20 and the material of the valve body 11 are conductive metal materials, when the material of the valve body 11 is aluminum, in order to protect the surface of the aluminum from corrosion, the surface of the aluminum may be treated by a surface anodization process, at this time, since the surface of the aluminum is anodized, the conductivity of the aluminum may be reduced, and the close fit between the matching portion 201 and the connection hole 115 is also beneficial to enabling the matching portion 201 of the conducting piece 20 to scrape the anodized layer on the inner circumferential surface of the connection hole 115, thereby being beneficial to the conductivity of the valve body 11, of course, the surface treatment of the valve body 11 may be performed by a process method such as chrome plating, and at this time, the conductivity of the valve body 11 may not be affected by.
Referring to fig. 13, the circuit board 16 includes a first surface 161 and a second surface 162, the first surface 161 faces away from the valve body 11, and referring to fig. 11, the second surface 162 faces toward the valve body 11, and the first surface 161 and the second surface 162 are arranged in parallel, where "parallel" means that the parallelism of the second surface 162 is 2mm with reference to the first surface 161, or the parallelism of the first surface 161 is 2mm with reference to the second surface 162; referring to fig. 13, the circuit board 16 further includes an abutting portion 163, the abutting portion 163 is formed on the second surface 162, and the abutting portion 163 is electrically connected to the reference ground layer of the circuit board 16; with reference to fig. 11 and 12, in the present embodiment, the upper surface 2021 of the upper portion 202 is disposed in contact with and electrically connected to the abutting portion 163, so that the conductive element 20 and the reference ground 31 of the circuit board 16 can indirectly achieve electrical conduction through the abutting portion 163; in addition, in the present embodiment, the surface of the abutting portion 163 is formed with a conductive layer, wherein the conductive layer may be processed by tin plating, electroless nickel plating, immersion gold, or the like, which is advantageous for improving the conductivity between the abutting portion 163 and the conductive member 20, but of course, the abutting portion 163 may be processed into a separate component and then fixedly connected to the circuit board 16, and in this case, the abutting portion 163 may be formed into another conductive structure such as a conductive metal sheet.
Referring to fig. 14 to 16, fig. 14 is a schematic structural view of a second embodiment in which a valve body, a circuit board, a conductive element and a sensor are combined together, fig. 15 is a schematic structural view of the conductive element in fig. 14, and fig. 16 is a schematic structural view of the conductive element, the first pin, the second pin, the third pin and the conductive element in fig. 14 combined together; the structure of the second embodiment of the guide will be described in detail below.
Referring to fig. 14 to 16, in the present embodiment, the conductive element 20a is electrically connected to the reference ground of the circuit board 16, and the conductive element 20a is fixedly connected to the circuit board 16, specifically, the conductive element 20a passes through the first surface 161 and the second surface 162 of the circuit board 16 and is fixedly connected to the circuit board 16 by soldering, but the conductive element 20a may also pass through only the second surface 162 of the circuit board 16 and does not pass through the first surface 161 of the circuit board 16, and the other end of the conductive element 20a is disposed in abutment or contact with the valve body 11; in this embodiment, the structure of the conductive element 20a is similar to that of the first pin 31, but the structure of the conductive element 20a may be designed into other structures to achieve the conductive function.
In this embodiment, when the valve body 11 is made of aluminum, if the surface adopts an anodizing treatment process, the surface coating corresponding to the valve body at the contact position of the conducting piece 20a and the valve body 11 may be scraped off before assembly to improve the conductivity of the valve body, and certainly, if the surface of the valve body 11 adopts a chromium plating process or the like, the surface corresponding to the valve body at the contact position of the conducting piece and the valve body does not need to be additionally scraped off; other features of this embodiment are similar to those of the first embodiment, and are not repeated herein.
Referring to fig. 17 to 19, fig. 17 is a schematic structural view of a third embodiment in which a valve body, a circuit board, a conductive member, and a sensor are combined together according to the present invention, fig. 18 is a schematic structural view of the conductive member, a first pin, a second pin, a third pin, and the conductive member being combined together, and fig. 19 is a schematic structural view of the conductive member in fig. 17 and 18; the structure of the third embodiment of the guide will be described in detail below.
Referring to fig. 17 to 19, in the present embodiment, the conductive element 20b is fixedly connected to the circuit board 16, specifically, the circuit board 16 includes a first surface 161 and a second surface 162, the first surface 161 is disposed opposite to the valve body 11, the second surface 162 faces the valve body 11, the first surface 161 and the second surface 162 are disposed in parallel, in the present embodiment, the conductive element 20b is an elastic element, the conductive element 20b includes a first connection end 21b and a second connection end 22b, the first connection end 21b is fixedly connected to the second surface 162 of the circuit board 16 by welding, and the second connection end 22b is disposed in contact with or abutted against the valve body 11; this can be done by surface mounting the conductive element 20b to the circuit board 16, which can simplify the assembly process of the conductive element 20 b.
Referring to fig. 19, the conductive element 20b further includes a middle portion 23b, the middle portion 23b is plate-shaped, the middle portion 23b is disposed between the first connection end 21b and the second connection end 22b, and the first end and the last end of the adjacent middle portions 23b are connected by an arc smooth transition connection, so that on one hand, stress concentration is avoided, and on the other hand, the conductive element 20b is easily elastically deformed. In addition, in the present embodiment, the elastic element is as described above, but of course, the elastic element may be other elastic elements such as a spring, a leaf spring, and the like.
Referring to fig. 17 to 19, after the conductive element 20b is mounted, since the first connection end 21b of the conductive element 20b is fixedly connected to the circuit board 16, the second connection end 22b of the conductive element 20b directly abuts against the valve body 11, and since the conductive element 20b is an elastic element, the conductive element 20b is compressed and deformed under the action of the circuit board 16, and further the conductive element 20b is elastically deformed, or the length of the conductive element 20b between the circuit board 16 and the valve body 11 is smaller than the length of the conductive element 20b in a natural state; in general, during the assembly process, a certain tolerance exists in the height between the valve body 11 and the circuit board 16, and in order to ensure that the conductive element 20b can contact with the valve body 11 and the circuit board 16, the height of the conductive element 20b must have a precision requirement, and in this embodiment, since the conductive element 20b is an elastic element, on one hand, the processing precision of the conductive element 20b in the height direction is reduced, and on the other hand, the reliability of the contact between the conductive element 20b and the valve body 11 is improved; for other features of this embodiment, reference may be made to the first embodiment of the electric valve, which is not repeated herein.
Referring to fig. 20 to 22, fig. 20 is a schematic structural view of a fourth embodiment in which a valve body, a circuit board, a conductive member, and a sensor are combined together according to the present invention, fig. 21 is a schematic structural view of the conductive member, a first pin, a second pin, a third pin, and the conductive member being combined together, and fig. 22 is a schematic structural view of the conductive member in fig. 19 and 20; the structure of the fourth embodiment of the guide will be described in detail below.
Referring to fig. 20 to 22, in the present embodiment, the conductive element 20c passes through the circuit board 16 and is fixedly connected to the circuit board 16, specifically, one end of the conductive element 20c passes through the first surface 161 and the second surface 162 of the circuit board 16 and is fixedly connected to the circuit board 16, the conductive element 20c is electrically connected to the reference ground layer of the circuit board 16, and the other end of the conductive element 20c is disposed in contact with the valve body 11; specifically, referring to fig. 20 and 22, in the present embodiment, the conductive member 20c includes an elastic section 21c and a non-elastic section 22c, the elastic section 21c is fixedly connected to the non-elastic section 22c, and the non-elastic section 22c passes through the first surface 161 and the second surface 162 of the circuit board 16 and is fixedly connected to the circuit board 16, but the non-elastic section 22c may also pass through only the second surface 162 of the circuit board 16 and not pass through the first surface 161 of the circuit board 16; in this embodiment, the elastic section 21c is a spring, the length of the elastic section 21c between the circuit board 16 and the valve body 11 is smaller than the length of the elastic section 21c in a natural state, of course, the elastic section 21c may also be a reed, an elastic sheet, a leaf spring or other elastic structures, and generally, during the assembly process, the height between the valve body 11 and the circuit board 16 has a certain tolerance, and in order to ensure that the conductive element 20c can contact with the valve body 11 and the circuit board 16, the height of the conductive element 20c must have a precision requirement, but in this embodiment, since the conductive element 20c includes the elastic section 21c, on one hand, it is beneficial to reducing the processing precision of the conductive element 20c in the height direction, and on the other hand, it is beneficial to improving the reliability of the contact; in addition, in this embodiment, the portion fixedly connected to the circuit board 16 is the non-elastic section 22c of the conductive element 20c, and the portion abutting against the valve body 11 is the elastic section 21c of the conductive element 20c, but of course, the portion fixedly connected to the circuit board 16 may also be the elastic section 22c of the conductive element 20c, and the portion abutting against the valve body 11 is the non-elastic section 21c of the conductive element 20c, and at this time, the fixing manner of the conductive element 20c may refer to the third embodiment of the conductive element in the present invention, and is not repeated herein; for other features of this embodiment, reference may be made to the first embodiment of the electric valve, which is not repeated herein.
Referring to fig. 23 to 26, fig. 23 is a schematic structural view of a fifth embodiment of the present invention in which a valve body, a circuit board, a conductive element, and a sensor are combined together, fig. 24 is a schematic structural view of a conductive portion in fig. 23, and fig. 25 is a schematic structural view of a conductive portion, a first pin, a second pin, a third pin, and a circuit board combined together; FIG. 26 is a schematic structural view of the support part in FIG. 23; the structure of the fifth embodiment of the guide will be described in detail below.
Referring to fig. 23 to 26, in the present embodiment, the conductive member 20d includes a supporting portion 21d and a conductive portion 22d, the supporting portion 21d and the conductive portion 22d are two independent components, the supporting portion 21d is fixedly connected to the valve body 11, specifically, referring to fig. 23 to 26, the supporting portion 21d includes a connecting portion 211d, in conjunction with fig. 7, the valve body 11 is formed with a connecting hole 115, the connecting hole 115 extends from the upper surface of the valve body 11 to a direction away from the upper surface of the valve body 11, the connecting portion 211d is tightly fitted to the connecting hole 115, of course, the connecting portion 211d and the connecting hole 115 of the valve body 11 can be connected by screw threads, in which case the connecting portion 201 is formed with external screw threads, the connecting hole 115 is formed with internal screw threads, the two screw threads are matched to realize fixed connection, when the support portion 21d is in threaded connection with the valve body 11, the support portion 21d may be a bolt or a screw, which is beneficial to saving the manufacturing cost; in this embodiment, the fixing manner of the supporting portion 21d and the valve body 11 can refer to the fixing manner of the conduction member and the valve body in the first embodiment, which is not described herein again.
Referring to fig. 23 to 26, the supporting portion 21d, the conductive portion 22d and the valve body 11 are made of metal materials, one end of the conductive portion 22d is disposed in contact with the supporting portion 21d, the other end of the conductive portion 22d is disposed in contact with the circuit board 16, the conductive portion 22d is electrically connected to a reference ground layer of the circuit board 16, and the reference ground layer of the circuit board 16 and the valve body 11 can be electrically conducted through the supporting portion 21d and the conductive portion 22 d; this is advantageous in that static electricity is led out from the valve body 11, and further, the influence of static electricity on the electric valve is reduced, thereby improving the electromagnetic compatibility of the electric valve.
Referring to fig. 23 to 26, in the present embodiment, the conductive portion 22d is fixedly connected to the circuit board 16 and electrically connected to the reference ground of the circuit board 16, specifically, the circuit board 16 includes a first surface 161 and a second surface 162, the first surface 161 faces away from the valve body 11, the second surface 162 faces toward the valve body, referring to fig. 24 and 25, the conductive portion 22d includes a first connection end 221d and a second connection end 222d, and the first connection end 221d is disposed in contact with the second surface 162 of the circuit board 16 and fixedly connected thereto, so that the conductive portion 22d and the circuit board 16 can be fixedly connected together by means of surface mounting, which is favorable for simplifying the assembly process of the conductive portion 22 d; the first connection end 221d of the conductive portion 22d is electrically connected to the reference ground layer of the circuit board 16, and the second connection end 222d is abutted against the upper surface 212d of the supporting portion 21d, so that electric conduction among the reference ground layer of the circuit board 16, the conductive portion 22d, and the supporting portion 21d can be realized; in this embodiment, the conductive portion 22d is fixedly connected to the circuit board 16, and of course, the conductive portion 22d may also be fixedly connected to the supporting portion 21d, specifically, the second connection end 222d of the conductive portion 22d is fixedly connected to the supporting portion 21d, and the first connection end 221d of the conductive portion 22d is abutted to the circuit board 16, and at this time, the circuit board 16 includes an abutting portion, and reference may be made to the abutting portion of the circuit board in the first embodiment for the description of the abutting portion, which is not repeated herein.
Referring to fig. 23 to fig. 26, in the embodiment, the conductive portion 22d is an elastic element, the conductive portion 22d further includes a middle portion 224d, the middle portion 224d is plate-shaped, the middle portion 224d is disposed between the first connection end 221d and the second connection end 222d, the first connection end 221d, the middle portion 224d, and the second connection end 222d are sequentially distributed at intervals, or a certain distance is provided between the first connection end 221d and the middle portion 224d, and a certain distance is provided between the second connection end 222d and the middle portion 224 d; the middle part 224d is connected with the first connection end 221d through an arc smooth transition, and the middle part 224d is connected with the second connection end 222d through an arc smooth transition; this facilitates the elastic deformation of the elastic element; in this embodiment, the conductive part 22d includes only one middle portion 224d, but it is also possible to provide more than two middle portions 224d between the first connection end 221d and the second connection end 222d, and connect the first end and the last end between the adjacent middle portions 224d, and reference may be made to the third embodiment of the conductive member. In addition, in the present embodiment, the elastic element is as described above, but of course, the elastic element may be other elastic elements such as a spring, a leaf spring, and the like; when the circuit board 16 is assembled, since the circuit board 16 is fixedly connected to the conductive portion 22d, the conductive portion 22d is compressed and deformed by the force of the circuit board 16, so that the conductive portion 22d is elastically deformed, or the length of the conductive portion 22d between the circuit board 16 and the supporting portion 21d is smaller than the length of the conductive portion 22d in a natural state; this is advantageous in that, on the one hand, the reliability of the contact between the conductive portion 22d and the support portion 21d is improved, and, on the other hand, the processing accuracy of the support portion 21d in the height direction is reduced; specifically, the length of the conductive portion 22d between the circuit board 16 and the support portion 21d is 0.7 to 0.8 times the length of the conductive portion 22d in a natural state; this is advantageous in terms of the elastic force of the opposing control conductive portion 22d and thus the reaction force acting on the circuit board 16 with respect to the control conductive portion 22d, while ensuring reliable contact between the conductive portion 22d and the support portion 21 d.
Referring to fig. 24, the first connection end 221d and the second connection end 222d are plate-shaped, the first connection end 221d and the second connection end 222d are arranged in parallel, the first connection end 221d has a through hole 223d, and the through hole 223d penetrates through the upper and lower surfaces of the first connection end 221 d; when the conductive portion 22d and the circuit board 16 are fixed by soldering, the contact area between the solder and the conductive portion 22d can be increased, which is advantageous for improving the reliability of the connection between the conductive portion 22d and the circuit board 16.
Referring to fig. 27 to 31, fig. 27 is a schematic structural view of a sixth embodiment in which a valve body, a circuit board, a conductive member, and a sensor are combined together according to the present invention, fig. 29 is a schematic structural view of a conductive portion in fig. 28, and fig. 30 is a schematic structural view of a support portion in fig. 28; FIG. 31 is a schematic view of the structure of the conductive portion, the first pin, the second pin, the third pin and the circuit board in combination; the structure of the sixth embodiment of the guide will be described in detail below.
Referring to fig. 27 to 33, the conductive element 20e includes a supporting portion 21e and a conductive portion 22e, the supporting portion 21e and the conductive portion 22e are two independent components, and the conductive portion 22e is electrically connected to the reference ground of the circuit board 16, in this embodiment, the supporting portion 21e is an elastic element, the conductive portion 22e is a non-elastic element, specifically, the supporting portion 21e is a spring, but the supporting portion 21e may also be a spring, a leaf spring, or other elastic structures; in this embodiment, the supporting portion 21e is limited by the valve body 11, part of the conductive portion 22e is sleeved on the outer periphery of the supporting portion 21e, and the conductive portion 22e is fixedly connected to the second surface 162 of the circuit board 16 by soldering, specifically, the conductive portion 22e includes a first accommodating portion 221e, the first accommodating portion 221e has a first accommodating cavity 2210e, and at least part of the supporting portion 21e is disposed in the first accommodating cavity 2210 e; referring to fig. 25, the valve body 11 includes a second accommodating portion 115e, the second accommodating portion 115e is formed with a second accommodating cavity 1150e, and at least a part of the supporting portion 21e is disposed in the second accommodating cavity 1150e, which facilitates the limit of the supporting portion 21 e; one end of the support portion 21e is disposed in contact with the bottom surface 2211e of the first accommodation portion 221e of the conductive portion 22e, and the other end of the support portion 21e is disposed in contact with the bottom surface of the second accommodation portion 115e of the valve body 11; since the conductive portion 22e is electrically connected to the reference ground of the circuit board 16, one end of the support portion 21e contacts the conductive portion 22e, and the other end of the support portion 21e contacts the valve body 11, the reference ground of the circuit board 16 and the valve body 11 can be electrically conducted through the support portion 21e and the conductive portion 22e, which is beneficial to improving the electromagnetic compatibility of the electric valve. Referring to fig. 32 and 33, a part of the conductive portion 22e is disposed in the second receiving cavity 1150e of the valve body 11 and is in clearance fit with the inner wall of the second receiving portion 115e of the valve body, so that when the circuit board 16 is assembled, since a part of the conductive portion 22e is disposed in the second receiving cavity of the valve body 11, the conductive portion 22e can be pressed against the supporting portion 21e, and the supporting portion 21e can be elastically deformed in the axial direction. In this embodiment, the conductive portion 22e and the circuit board 16 are fixedly connected by soldering, and of course, the conductive portion 22e may also be fixedly connected with the supporting portion 21e, specifically, the supporting portion 21e and the bottom surface 2211e of the first accommodating portion 221e of the conductive portion 22e are disposed in contact and fixedly connected, and at this time, the circuit board 16 includes a butting portion, and the description of the butting portion may refer to the butting portion in the first embodiment, which is not repeated herein.
It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.
Claims (12)
1. An electrically operated valve comprises a valve body, a valve core, a rotor assembly, a stator assembly and a circuit board, wherein the electrically operated valve is provided with a valve port, the rotor assembly can drive the valve core to move, and the valve core can move relative to the valve port; the stator assembly is positioned on the periphery of the rotor assembly and is electrically connected with the circuit board; the method is characterized in that: the electrically operated valve further comprises a conductive element, the conductive element and the valve body are capable of conducting electricity, at least part of the conductive element is arranged between the circuit board and the valve body, at least part of the conductive element is electrically connected with a reference stratum of the circuit board, at least part of the conductive element is in contact with the valve body, and the reference stratum of the circuit board is electrically conducted with the valve body through the conductive element.
2. Electrically operated valve according to claim 1, characterized in that: the conducting piece is fixedly connected with the valve body, and the conducting piece and the valve body are both made of conductive metal materials; the circuit board comprises a first face and a second face, the first face faces away from the valve body, and the second face faces towards the valve body; the circuit board further comprises a butting part, the butting part is formed on the second surface and is electrically connected with the reference stratum of the circuit board, and the upper surface of the conducting piece is in contact with the butting part and is electrically connected with the butting part.
3. Electrically operated valve according to claim 1, characterized in that: the conducting piece is fixedly connected with the circuit board, the conducting piece and the valve body are both made of conductive metal materials, and the conducting piece is electrically connected with a reference stratum of the circuit board; the circuit board comprises a first surface and a second surface, the first surface faces away from the valve body, the second surface faces towards the valve body, one end of the conducting piece is in contact with the valve body, the other end of the conducting piece is fixedly connected with the second surface, or the conducting piece penetrates through the first surface and the second surface and is fixedly connected with the circuit board.
4. Electrically operated valve according to claim 1, characterized in that: the conducting piece comprises a supporting portion and a conducting portion, the supporting portion is fixedly connected with the valve body or the supporting portion passes through the valve body is arranged in a limiting mode, one end of the conducting portion is in contact with the supporting portion, the other end of the conducting portion is in contact with the circuit board, the supporting portion is in contact with the valve body and is arranged, the conducting portion is electrically connected with a reference stratum of the circuit board, the supporting portion, the conducting portion and the valve body are made of conductive metal materials, and the reference stratum of the circuit board passes through the supporting portion and the conducting portion and the valve body are electrically conducted.
5. Electrically operated valve according to claim 4, characterized in that: the conductive part is fixedly connected with the circuit board; the circuit board comprises a first face and a second face, the first face faces away from the valve body, and the second face faces towards the valve body; the conductive part comprises a first connecting end and a second connecting end, the first connecting end is in contact with and fixedly connected with the second surface of the circuit board, the first connecting end is electrically connected with the reference stratum of the circuit board, and the second connecting end is abutted against the supporting part.
6. Electrically operated valve according to claim 4, characterized in that: the conductive part is fixedly connected with the supporting part or is limited by the supporting part; the circuit board comprises a first face and a second face, the first face faces away from the valve body, and the second face faces towards the valve body; the circuit board further comprises an abutting part which is formed on the second surface and is electrically connected with the reference stratum of the circuit board; the conductive part comprises a first connecting end and a second connecting end, the first connecting end is abutted against the abutting part of the circuit board and is electrically connected with the reference stratum of the circuit board, and the second connecting end is fixedly connected with the supporting part.
7. Electrically operated valve according to claim 5 or 6, characterized in that: the conductive part is an elastic element, the elastic element is electrically connected with a reference ground layer of the circuit board, and the length of the elastic element between the circuit board and the supporting part is smaller than that of the elastic element in a natural state.
8. Electrically operated valve according to claim 7, characterized in that: the conductive part further comprises a middle part, the middle part is arranged between the first connecting end and the second connecting end, and the first connecting end, the middle part and the second connecting end are sequentially distributed at intervals; the middle part is connected with the first connecting end through arc smooth transition, the middle part is connected with the second connecting end through arc smooth transition, the first connecting end comprises a through hole, and the through hole penetrates through the upper surface and the lower surface of the first connecting end.
9. Electrically operated valve according to any of claims 4 to 8, characterized in that: the supporting part is fixedly connected with the valve body; the valve body is formed with a connecting hole, the connecting hole extends from the upper surface of the valve body to a direction away from the upper surface of the valve body, the supporting part comprises a connecting part, and the connecting part is tightly matched with the connecting hole or is in threaded connection with the connecting hole.
10. An electrically operated valve according to claim 3, characterised in that: at least part of the conduction piece is an elastic section, and the length of the elastic section between the circuit board and the valve body is smaller than that of the elastic section in a natural state.
11. Electrically operated valve according to claim 5 or 6, characterized in that: the supporting part is an elastic element, the conductive part is a non-elastic element, part of the conductive part is sleeved on the periphery of the supporting part, the conductive part comprises a first accommodating part, a first accommodating cavity is formed in the first accommodating part, and at least part of the supporting part is arranged in the first accommodating cavity; the valve body comprises a second accommodating part, a second accommodating cavity is formed in the second accommodating part, and at least part of the supporting part is arranged in the second accommodating cavity; one end of the supporting part is arranged in contact with the bottom surface of the first accommodating part of the conductive part, and the other end of the supporting part is arranged in contact with the bottom surface of the second accommodating part.
12. A thermal management assembly comprising an electrically operated valve and a heat exchanger, the electrically operated valve being fixedly connected to the heat exchanger, the electrically operated valve being as claimed in any one of claims 1 to 11.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435988.9A CN111237523B (en) | 2018-11-28 | 2018-11-28 | Electrically operated valve and thermal management assembly |
| PCT/CN2019/121183 WO2020108514A1 (en) | 2018-11-28 | 2019-11-27 | Electric valve, heat management assembly and air conditioning system |
| US17/278,276 US11761557B2 (en) | 2018-11-28 | 2019-11-27 | Electric valve, heat management assembly and air conditioning system |
| KR1020217008364A KR102524145B1 (en) | 2018-11-28 | 2019-11-27 | Motorized valves, thermal management assemblies and air conditioning systems |
| EP19888399.3A EP3839305A4 (en) | 2018-11-28 | 2019-11-27 | Electric valve, heat management assembly and air conditioning system |
| JP2021514542A JP7273146B2 (en) | 2018-11-28 | 2019-11-27 | Motor operated valves, thermal management units and air conditioning systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435988.9A CN111237523B (en) | 2018-11-28 | 2018-11-28 | Electrically operated valve and thermal management assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111237523A true CN111237523A (en) | 2020-06-05 |
| CN111237523B CN111237523B (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811435988.9A Active CN111237523B (en) | 2018-11-28 | 2018-11-28 | Electrically operated valve and thermal management assembly |
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| Country | Link |
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| CN (1) | CN111237523B (en) |
Cited By (1)
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|---|---|---|---|---|
| WO2022184075A1 (en) * | 2021-03-05 | 2022-09-09 | 法雷奥汽车空调湖北有限公司 | Electronic expansion valve |
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| CN207364390U (en) * | 2017-08-24 | 2018-05-15 | 杭州三花研究院有限公司 | Motor-driven valve |
| CN108869830A (en) * | 2017-05-09 | 2018-11-23 | 浙江三花汽车零部件有限公司 | Electric expansion valve, thermal management assemblies, cooling system and electronic expansion valve manufacturing method |
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| US20150048266A1 (en) * | 2012-02-28 | 2015-02-19 | Emerson Climate Technologies (Suzhou) Co., Ltd. | Electronic expansion valve |
| CN107620824A (en) * | 2016-07-14 | 2018-01-23 | 浙江三花汽车零部件有限公司 | Electric expansion valve |
| CN207049366U (en) * | 2017-05-09 | 2018-02-27 | 浙江三花汽车零部件有限公司 | Electric expansion valve and the thermal management assemblies including electric expansion valve |
| CN108869830A (en) * | 2017-05-09 | 2018-11-23 | 浙江三花汽车零部件有限公司 | Electric expansion valve, thermal management assemblies, cooling system and electronic expansion valve manufacturing method |
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| WO2022184075A1 (en) * | 2021-03-05 | 2022-09-09 | 法雷奥汽车空调湖北有限公司 | Electronic expansion valve |
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| CN111237523B (en) | 2021-07-06 |
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