An electrically operated valve

Abstract

The utility model provides an electric valve, including valve body, valve body has flow passage and installation cavity, electric valve still includes pressure sensing unit, installation cavity includes pressure sensing unit installation cavity, at least part pressure sensing unit is located pressure sensing unit installation cavity, electric valve still includes cover plate part, cover plate part includes first limit part, valve body still includes riveting part, riveting part with one side of cover plate part abuts against, and cover plate part is limited, first limit part with pressure sensing unit abuts against, and pressure sensing unit is limited in pressure sensing unit installation cavity, and pressure sensing unit can sense the pressure of working medium in flow passage, the electric valve provided by the utility model can save electric valve cost, and the installation of pressure sensing unit is convenient.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and more specifically to an electric valve. Background Technology

[0002] To improve the flow control accuracy of the working medium, the thermal management system uses electric valves to adjust the flow rate of the system's working medium. The control of the electric valves includes superheat control. Calculating the superheat requires obtaining the pressure signal of the working medium; therefore, a pressure sensor needs to be installed on the electric valve. Thus, how to save on the cost of the electric valve and facilitate the installation of the pressure sensor is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide an electric valve that can save costs and facilitate the installation of pressure sensing units.

[0004] To achieve the above objectives, one embodiment of the present invention adopts the following technical solution:

[0005] An electric valve includes a valve body having a flow channel and a mounting cavity. The electric valve further includes a pressure sensing unit, the mounting cavity including a pressure sensing unit mounting cavity, at least a portion of the pressure sensing unit being located in the pressure sensing unit mounting cavity. The electric valve also includes a cover plate component, the cover plate component including a first limiting portion. The valve body further includes a riveting portion, the riveting portion abutting against one side of the cover plate component to limit the cover plate component. The first limiting portion abuts against the pressure sensing unit, confining the pressure sensing unit within the pressure sensing unit mounting cavity. The pressure sensing unit is capable of sensing the pressure of the working medium within the flow channel.

[0006] In this technical solution, the pressure sensing unit is fixed by riveting, which facilitates the installation of the pressure sensing unit and saves the cost of the electric valve. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of an electric valve from one perspective;

[0008] Figure 2 yes Figure 1 Another structural schematic diagram of the electric valve;

[0009] Figure 3 yes Figure 2 A cross-sectional view of the electric valve along the AA direction;

[0010] Figure 4 yes Figure 2 A cross-sectional view of the electric valve along the BB direction;

[0011] Figure 5 yes Figure 1 A three-dimensional structural diagram of the valve body from one perspective;

[0012] Figure 6 This is a structural schematic diagram of the valve body, pressure sensing unit, and temperature sensing unit from one perspective.

[0013] Figure 7 yes Figure 6 A cross-sectional structural diagram;

[0014] Figure 8 yes Figure 1 A structural schematic diagram of the valve body from one perspective;

[0015] Figure 9 yes Figure 8 A cross-sectional view of the valve body along the CC direction;

[0016] Figure 10 yes Figure 1 A three-dimensional structural diagram of a medium-pressure sensing element;

[0017] Figure 11 yes Figure 1 A schematic diagram of the structure of the temperature sensing unit from one perspective;

[0018] Figure 12 yes Figure 11 A cross-sectional view of the temperature sensing unit;

[0019] Figure 13 This is a three-dimensional structural schematic diagram of one embodiment of the connecting plate;

[0020] Figure 14 This is a three-dimensional structural schematic diagram of one embodiment of the cover plate component;

[0021] Figure 15 This is a three-dimensional structural schematic diagram of one embodiment of the connecting component;

[0022] Figure 16 This is a three-dimensional structural diagram of the valve body, pressure sensing unit, temperature sensing unit, cover plate component, and connecting components from one perspective.

[0023] Figure 17 This is a three-dimensional structural diagram of the combination of the cover plate component and the connecting component in another embodiment;

[0024] Figure 18 yes Figure 17 Another structural schematic diagram of the combination of the middle cover plate component and the connecting component;

[0025] Figure 19 yes Figure 18A schematic cross-sectional view of the middle structure along the DD direction;

[0026] Figure 20 This is a structural schematic diagram of another embodiment of the connecting plate;

[0027] Figure 21 This is a three-dimensional structural schematic diagram of another embodiment of the cover plate component;

[0028] Figure 22 This is a schematic diagram of another embodiment of the temperature sensing unit;

[0029] Figure 23 yes Figure 22 A cross-sectional structural diagram of the temperature sensing unit;

[0030] Figure 24 This is a schematic diagram of another embodiment of the electric valve;

[0031] Figure 25 yes Figure 24 A schematic cross-sectional view of the electric valve along the EE direction.

[0032] Figure 26 yes Figure 24 A structural schematic diagram of the valve body;

[0033] Figure 27 yes Figure 26 A cross-sectional view of the valve body along the FF direction;

[0034] Figure 28 yes Figure 2 A cross-sectional view of another embodiment of the electric valve along the BB direction. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] Combination Figures 1-9In this embodiment, the electric valve 100 includes a valve body 1, a valve component 2, an electronic control unit 3, and a drive unit 4. The valve component 2 includes a valve core 21. The valve body 1 includes a valve component mounting cavity 11, with a portion of the valve component 2 located in the valve component mounting cavity 11. The valve body 1 has a first flow channel 12, a second flow channel 13, and a flow passage 14. The electric valve has a valve port 22 located between the first flow channel 12 and the second flow channel 13. The valve core 21 can move relative to the valve port 22 and change the opening degree of the valve port 22. The electronic control unit 3 can control the drive unit 4. 4. The electric valve drives the movement of the valve core 21. The electric valve also includes a pressure sensing unit 5 and / or a temperature sensing unit 6. In this embodiment, the electric valve includes a pressure sensing unit 5 and a temperature sensing unit 6, which are separately arranged and both connected to the valve body 1. The pressure sensing unit 5 can sense the pressure of the working medium in the flow channel 14 and generate a piezoelectric signal; the temperature sensing unit 6 can sense the temperature of the working medium in the flow channel 14, and a signal corresponding to the temperature is output to the electronic control unit 3. In this embodiment, the electronic control unit 3 includes an electronic control board 31 and a connecting plate 32. The electronic control unit 3 also includes a conditioning circuit. In this embodiment, the conditioning circuit is disposed on the connecting plate 32. The piezoelectric signal generated by the pressure sensing unit 5 is processed by the conditioning circuit on the connecting plate 32 to form a signal corresponding to the pressure, which is then output to the electronic control board 31. This signal serves as part of the signal used to generate the control drive unit 4. Of course, in other embodiments, the conditioning circuit can also be disposed on the electronic control board 31, and the connecting plate 32 can serve as an electrical connection and / or signal connection, or the connecting plate 32 can be omitted. The temperature sensing unit 6 can sense the temperature of the working medium within the flow channel 14 and output a signal to the connecting plate 32, which then transmits the signal to the electronic control board 31. This signal serves as part of the signal for generating the control drive unit 4. Alternatively, without the connecting plate 32, the temperature-related signal can be output to the electronic control board 31. This technical solution uses the pressure sensing unit 5 to acquire a piezoelectric signal, which is then converted into a pressure-related signal by a conditioning circuit and used as part of the signal for generating the control drive unit 4. This eliminates the need for a separate protective cover and encapsulation structure for the pressure sensing unit 5, utilizing an electric valve to protect it and reducing costs. Similarly, the temperature sensing unit 6 acquires the temperature signal corresponding to the working medium and outputs it to the connecting plate 32, which then outputs it to the electronic control board 31, serving as part of the signal for generating the control drive unit 4. This separate setup of the temperature sensing unit 6 further reduces costs. In this embodiment, the pressure sensing unit 5 and temperature sensing unit 6 are separately configured, increasing the flexibility of their combination and reducing product costs. In this embodiment, the flow channel 14 is located in the valve body 1, and the extension direction of the flow channel 14 is the same as the extension direction of the first flow channel 12 and the second flow channel 13; of course, it can also be other extension directions.Of course, the flow channel 14 can also be located in other components of the heat exchanger or thermal management system.

[0037] See Figure 3 In this embodiment, the electronic control unit 3 has an input terminal 33, through which power is supplied to the electronic control board 31 and signals sent by the host computer are received. The drive unit 4 includes a coil assembly 41 and a rotor assembly 42. The coil assembly 41 is electrically connected to the electronic control board 31. The electronic control board 31 sends a drive signal to the coil assembly 41, which generates an excitation magnetic field. The rotor assembly 42 rotates under the action of the excitation magnetic field. The electric valve 100 also includes a transmission device, which includes a nut 91 and a screw 92. The nut 91 is fixed, and the screw 92 is connected to the rotor assembly 42 and the valve core 21. The transmission device converts the rotation of the rotor assembly 42 into the axial movement of the valve core 21. Of course, the above drive unit 4 and transmission device are not limited to the implementation of this embodiment. Other structures can be used to achieve the same effect. The valve core can also be replaced with the valve core of a ball valve or a gate valve.

[0038] Combination Figures 4-9 In this embodiment, the valve body 1 has a mounting cavity 15, which includes a pressure sensing unit mounting cavity 151 and a temperature sensing unit mounting cavity 152. At least a portion of the pressure sensing units 5 are located in the pressure sensing unit mounting cavity 151, and at least a portion of the temperature sensing units 6 are located in the temperature sensing unit mounting cavity 152. The pressure sensing unit 5 includes a pressure sensing element 51. In this embodiment, the pressure sensing element 51 is a ceramic capacitive pressure sensor. Using a ceramic capacitive pressure sensor as the pressure sensing element helps reduce costs. Of course, in other embodiments, the pressure sensing unit 5 can also use other types of pressure sensors. The temperature sensing unit 6 includes a temperature sensing element, which is a thermistor. Using a thermistor as the temperature sensing element helps reduce costs. The pressure sensing unit 5 and the temperature sensing unit 6 are provided separately, which increases the flexibility of selection and combination, and helps reduce product costs.

[0039] Combination Figures 1 to 16In this embodiment, the electronic control unit 3 includes an electronic control board 31 and a connecting plate 32. The electric valve also includes a connecting component 7 and a cover plate component 8. The pressure sensing unit 5 is connected to the connecting plate 32 by welding and is electrically and / or signal connected. The temperature sensing unit 6 is connected to the connecting plate 32 by welding and is electrically and / or signal connected. The connecting plate 32 includes a first plate body 322 and a second plate body 323. The first plate body 322 and the second plate body 323 are integrally formed. The second plate body 323 protrudes from the outer edge of the first plate body 322. The connecting plate 32 includes a first set of solder pads 3221 and a second set of solder pads 3231. The first set of solder pads 3221 is located on the first plate body 322, and the second set of solder pads 3231 is located on the second plate body 323. The pressure sensing unit 5 includes a first set of pins 53, and the temperature sensing unit 6 includes a second set of pins 68. The pressure sensing unit 5 is connected to the first set of solder pads 3221 by welding, and the temperature sensing unit 6 is connected to the second set of solder pads 3231 by welding. Of course, in other embodiments, the pressure sensing unit 5 can also be connected to the connecting plate 32 by crimping or snapping. There are multiple connecting components 7, one end of which abuts against the electronic control board 31, and the other end abuts against the connecting plate 32. The connecting plate 32 and the electronic control board 31 are electrically connected and / or signal connected through the connecting components 7. In this embodiment, the cover plate component 8 can be used to fix the pressure sensing unit 5 and the temperature sensing unit 6, and the cover plate component 8 can also limit the movement of the connecting components 7. The cover plate component 8 includes a first limiting part 81, a second limiting part 82, and a cover plate 83. The first limiting part 81, the second limiting part 82, and the cover plate 83 are integrally formed. The first limiting part 81 is generally cylindrical, and the second limiting part 82 is also generally cylindrical. The second limiting part 82 is located on the outer periphery of the first limiting part 81. The first limiting part 81 and the second limiting part 82 are connected by a transition part 85. Of course, in other embodiments, the first limiting part 81 and the second limiting part 82 can also be directly connected. The outer diameter of the first limiting part 81 is larger than the outer diameter of the second limiting part 82. The cover plate 83 is located at one end of the cover plate component 8 along its axial direction. At least a portion of the cover plate component 8 is located in the mounting cavity 15, wherein the first limiting part 81 is located in the pressure sensing unit mounting cavity 151, and the second limiting part 82 is located in the temperature sensing unit mounting cavity 152. The valve body 1 includes a riveting part 16, and the electric valve also includes a first groove 17. The first groove 17 is machined around the mounting cavity 15. The plate-shaped protrusion between the first groove 17 and the mounting cavity 15 serves as the riveting part 16. The riveting part 16 includes a first riveting part 161 and a second riveting part 162.The riveting part 16 is brought into contact with the cover plate component 8 by riveting, thereby limiting the cover plate component 8 and fixing the pressure sensing unit 5 and / or the temperature sensing unit 6. In this embodiment, the first riveting part 161 is bent and deformed towards the side where the first limiting part 81 is located by riveting, and abuts against the first limiting part 81. The second riveting part 162 is bent and deformed towards the side where the second limiting part 82 is located by riveting, and abuts against the second limiting part 82. The cover plate component 8 fixes the pressure sensing unit 5 and the temperature sensing unit 6 at the same time. Specifically, the first limiting part 81 abuts against the top part 52 of the pressure sensing unit 5, and the second limiting part 82 abuts against the top part 67 of the temperature sensing unit 6. After the cover plate component 8 is fixed by riveting, the first limiting part 81 can abut against the pressure sensing unit 5 and limit the pressure sensing unit 5, and the second limiting part 82 can abut against the temperature sensing unit 6 and limit the temperature sensing unit 6. Of course, in other embodiments, the cover plate component 8 can be fixed in other ways, including snap-fit ​​fixing and screw fixing. In this embodiment, the pressure sensing unit 5 and the temperature sensing unit 6 are fixed by riveting the cover plate component 8, which can reduce costs and simplify the installation of the pressure sensing unit 5 and the temperature sensing unit 6. In this embodiment, the connecting component 7 is an elastic element. The connecting component 7 is in a compressed state. One end of the connecting component 7 abuts against the electronic control board 31, and the other end abuts against the connecting plate 32. The electronic control board 31 and the connecting plate 32 are electrically connected and / or signal connected through the connecting component 7. The cover plate 83 has a first hole 831. There are multiple first holes 831. The first holes 831 are correspondingly arranged with the connecting component 7. The connecting component 7 can pass through the first hole 831. The cover plate 83 limits the connecting component 7 to prevent the connecting component 7 from shifting. This arrangement helps to improve the reliability of the connecting component 7. Of course, in other embodiments, the connecting component 7 may not be an elastic element, but may be other types of metal parts, such as metal wires. The control board 31 has a first set of metal contacts (not shown in the figure), and the connecting plate 32 has a second set of metal contacts 321. The second set of metal contacts 321 is located on the first plate 322. One end of the connecting component 7 abuts against the first set of metal contacts, and the other end abuts against the second set of metal contacts 321. Since the connecting component 32 is fixed using the cover plate 83, the connecting component 7 does not need to be welded to the control board 31 and the connecting plate 32 separately. This prevents the connecting component 7 from shifting, facilitates the assembly of the electric valve, simplifies the process, and reduces welding steps. (Refer to the figure.) Figures 17-19In another embodiment of the cover plate component 8, the cover plate component 8 includes a cylindrical portion 832 located on the cover plate 83. The cylindrical portion 832 and the cover plate 83 are integrally injection molded. The cylindrical portion 832 protrudes from the cover plate 83. A portion of the connecting component 7 is located within the inner cavity of the cylindrical portion 832. The cylindrical portion 832 includes multiple portions, and the cylindrical portions 832 are correspondingly arranged with the connecting components 7. The connecting components 7 can pass through the cylindrical portion 832, and the cylindrical portion 832 can limit the positioning of the connecting components 7. Setting the cylindrical portion 832 relative to the first hole 831 in the previous embodiment helps to further prevent the connecting components 7 from shifting, and also helps to improve the reliability of the connecting components 7. Of course, in other embodiments, the cover plate component 83 and the connecting components 7 can be fixed by injection molding, with the connecting components 7 as injection molding inserts to form the cover plate component 8. This can reduce assembly steps and also helps to improve the reliability of the connecting components 8. By providing the connecting plate 32, the number of connecting parts 7 between the pressure sensing unit 6 and the temperature sensing unit 6 and the electronic control board 31 can be reduced, which helps to improve the reliability of the connection. Of course, in other embodiments, the cover plate component 8 may not be provided with a cover plate 83.

[0040] Combination Figures 1-10In this embodiment, the valve body 1 includes a first wall 18, which surrounds the pressure sensing unit mounting cavity 151. The first wall 18 includes a first step portion 181, which includes a bottom surface 1811 and a side surface 1812. After the cover plate component 8 is fixed by riveting, the bottom surface of the first limiting portion 81 abuts against the bottom surface 1811 of the first step portion, and the bottom surface of the first limiting portion 81 abuts against the pressure sensing element 51. In this way, the bottom surface 1811 of the first step portion can limit the position of the lowest end of the cover plate component 8, preventing the cover plate component 8 from damaging the pressure sensing element 51. The side surface 1812 of the first step portion limits the radial position of the first limiting portion 81 of the cover plate component 8. In this embodiment, the first wall 18 further includes a bottom surface 1813, a side surface 1814, and a first channel 1815. The first channel 1815 is located near the center of the bottom surface 1813. The side surface 1814 can cooperate with the peripheral side surface of the pressure sensing element 51 to limit the radial direction of the pressure sensing element 51. The pressure sensing element 51 has a pressure sensing part, and the working medium in the flow channel 14 can contact the pressure sensing part of the pressure sensing element 51 through the first channel 1815. The bottom surface 1813 of the first wall has a first sealing groove 1816. The electric valve also includes a first sealing element 1817. Part of the first sealing element 1817 is accommodated in the first sealing groove 1816. The first sealing element 1817 is located between the bottom surface of the pressure sensing element 51 and the first sealing groove 1816. The bottom surface of the pressure sensing element 51 abuts against and presses the first sealing element 1817, which helps to prevent leakage of the working medium. In this embodiment, the bottom surface 1811 of the first step portion can prevent the first seal 1817 from being over-compressed by the pressure sensing element 51. At the same time, the bottom surface 1811 of the first step portion can control the compression amount of the first seal 1817, which is beneficial to improving the sealing performance. Of course, in other embodiments, the bottom surface 1811 of the first step portion may not be provided, and the first sealing groove 1816 may not be provided.

[0041] Combination Figures 3-4 , Figures 20-21In this embodiment, compared to the previous embodiment, the connecting plate 32 is a flexible circuit board. The pressure sensing unit 5 is connected to the connecting plate 32 by welding and is electrically and / or signal connected. The temperature sensing unit 6 is connected to the connecting plate 32 by welding and is electrically and / or signal connected. The connecting plate 32 and the electronic control board 31 are electrically and / or signal connected through the connecting component 7. In this embodiment, the connecting component 7 is part of the connecting plate 32, or the connecting component 7 is fixed to the connecting plate 32 by welding. Using a flexible circuit board can reduce the impact of stress on the welding parts and prevent damage to the welding parts due to stress. In this embodiment, the conditioning circuit is disposed on the connecting plate 32. Of course, the conditioning circuit can also be disposed on the electronic control board 31. Referring to the figure, the cover plate component 8 in this embodiment does not have a cover plate 83 compared to the previous embodiment.

[0042] Combination Figures 1-16In this embodiment, at least a portion of the temperature sensing unit 6 is located in the temperature sensing unit mounting cavity 152. The temperature sensing unit 6 includes a temperature sensing part 61, a conductor part 62, a housing part 63, and a cylindrical part 64. The housing part 63 and the cylindrical part 64 abut against each other. In this embodiment, the conductor part 62 includes a first conductor part 621 and a second conductor part 622. The first conductor part 621 and the second conductor part 622 are fixedly connected by welding. Of course, they can also be fixedly connected in other ways. One end of the conductor part 62 is connected to the temperature sensing part 61, and the other end is fixedly connected to the connecting plate 32 by welding, and is electrically connected and / or signal connected. The housing portion 63 includes a first cylindrical portion 631 and a first flange portion 632. The first flange portion 632 is radially protruding from the upper end of the first cylindrical portion 631. The first cylindrical portion 631 includes a second hole portion 6311. At least a portion of the temperature sensing portion 61 is located in the second hole portion 6311. The valve body 1 includes a second wall 19. The second wall 19 is disposed around the temperature sensing unit mounting cavity 152. The second wall 19 includes a second wall bottom 191, a second wall side portion 192, and a second channel 193. The second channel 193 is located at a position near the middle of the second wall bottom 191. The lower end face of the first flange portion 632 abuts against the second wall bottom 191 to restrict the axial position of the housing portion 63. The outer periphery of the first flange portion 632 cooperates with the second wall side portion 192 to restrict the radial position of the housing portion 63. In this embodiment, a portion of the first cylindrical portion 631 is located in the second channel 193, and a portion of the first cylindrical portion 631 is located in the flow channel 14. At least a portion of the temperature sensing portion 61 is located in the inner cavity of the first cylindrical portion 631. The temperature sensing portion 61 can directly contact the working medium in the flow channel 14, which is beneficial to improving the reliability of temperature detection. The first cylindrical portion 631 can protect the temperature sensing portion 61, which is beneficial to reducing flow resistance and stabilizing the temperature sensing portion 61. The lower end face of the cylindrical portion 64 abuts against the upper end face of the housing portion 63, limiting the housing portion 63. The temperature sensing unit 6 also includes a second sealing member 65. The cylindrical portion 64 includes a first groove 641, which is located on the outer periphery of the cylindrical portion 64 and surrounds the cylindrical portion 64. A portion of the second sealing member 65 is accommodated in the first groove 641. The second sealing member 65 is located between the cylindrical portion 64 and the second wall side portion 192, which is beneficial to preventing leakage of the working medium. The cylindrical portion 64 has a first hole 642, and the temperature sensing unit 6 also has a first part 66. The first part 66 is located in the first hole 642 and covers part of the second conductor portion 622. The first part 66 is located in the first hole 642 and fills the first hole 642. The first part 66 is formed by glass sintering and seals both ends of the first hole 642. The conductor portion 62 passes through the first hole 642 and the second hole 6311. The connection between the first conductor portion 621 and the second conductor portion 622 is located below the first part.In this embodiment, the lower end face of the second limiting part 82 of the cover plate component 8 abuts against the upper end face of the cylindrical part 64, the lower end face of the cylindrical part 64 abuts against the upper end face of the first flange part 632, and the lower end face of the first flange part 632 abuts against the bottom 191 of the second wall, thereby limiting the temperature sensing unit 6 by the second limiting part 82. The working medium can contact the first part 66 through the second hole 6311, the first part 66 can prevent the working medium from passing through the first hole 642, and the second sealing member 65 can prevent the working medium from passing between the second wall side part 192 and the outer peripheral wall of the cylindrical part 64. The use of glass sintering for sealing helps to prevent leakage of the working medium, and the temperature sensing unit 61 can be directly exposed in the working medium, which helps to improve the sensitivity of temperature detection. At the same time, the housing part 63 is provided to protect the temperature sensing unit 61, which helps to reduce flow resistance and improve the reliability of the temperature sensing unit 6. In this embodiment, the first conductor portion 621 and the second conductor portion 622 are fixedly connected by welding, which facilitates the assembly of the temperature sensing unit 6. Of course, in other embodiments, the first conductor portion 621 and the second conductor portion 622 may be integrally formed or connected in other ways. In this embodiment, the housing portion 63 is made of plastic material. Of course, in other embodiments, the housing portion 63 may also be made of metal material.

[0043] Combination Figures 22-27In this embodiment, the temperature sensing unit 6 is fixed to the valve body 1 by welding. The temperature sensing unit 6 does not need to be fixed by the cover plate component 8. The temperature sensing unit 6 includes a temperature sensing part 61, a conductor 62, and a housing part 63. One end of the conductor 62 is fixedly connected to the temperature sensing part 61, and is electrically and / or signal connected. The other end is fixedly connected to the connecting plate 32 by welding, and is electrically and / or signal connected. In this embodiment, the housing part 63 is made of metal. The end of the housing part 63 away from the connecting plate 32 is closed, and the end near the connecting plate 32 is open. The temperature sensing part 61 is placed inside the housing part 63. The outer casing 63 includes a first outer casing 631, an outer edge 632, and a closing portion 633. The first outer casing 631, outer edge 632, and closing portion 633 are integrally formed. The bottom of the first outer casing 631 is closed. The outer edge 632 protrudes from the first outer casing 631. The closing portion 633 is located at the bottom of the first outer casing 631 and seals the bottom of the first outer casing 631. The temperature sensing unit 61 is located inside the outer casing 63. The valve body 1 also includes a first surrounding wall 19, which surrounds the temperature sensing unit mounting cavity 152. The first surrounding wall 19 includes a first surrounding wall 191, a first surrounding wall side portion 192, and a channel 193. The first outer casing 631... The outer edge 632 is fixed to the valve body 1 by welding through the channel 193 and sealed by the weld surface. Specifically, in this embodiment, the bottom surface of the outer edge 632 is engaged with the bottom 191 of the first surrounding wall and welded, and sealed by the formed weld surface. The outer peripheral surface of the outer edge 632 is engaged with the side part 192 of the first surrounding wall to radially limit the outer shell 63. The outer shell 63 is fixed by welding to form a weld surface and a sealing surface, which helps to prevent the working medium in the flow channel 14 from leaking. This eliminates the need for a sealing element, reduces the number of parts, and improves the reliability of the seal. At the same time, the temperature sensing unit 6 is fixed to the valve body 1 by welding, which facilitates the assembly of the temperature sensing unit 6. In this embodiment, the outer shell 63 is made of metal. At least a portion of the temperature sensing part 61 is located within the flow channel 14. The temperature sensing part 61 can sense the temperature of the working medium within the flow channel 14. The temperature sensing part 61 is in contact with the bottom wall and / or side wall of the first outer shell 631. The bottom wall of the first outer shell 631 is the sealing part 633, which helps to improve heat transfer efficiency and temperature sensing sensitivity. Simultaneously, the outer shell 63 protects the temperature sensing part 61. In this embodiment, the temperature sensing unit 6 also includes a thermally conductive medium 64, which includes thermally conductive silicone. The thermally conductive medium 64 covers at least a portion of the temperature sensing part 61 and is in contact with the outer shell 63, further improving heat transfer efficiency.In this embodiment, the temperature sensing unit 6 may further include a potting compound 65, which includes epoxy resin. The potting compound 65 fills the outer shell portion and covers part of the conductor 62 above the heat-conducting medium 64, thus further fixing it and preventing the temperature sensing unit 61 from shaking. Of course, in other embodiments, the temperature sensing unit 61 may not abut against the bottom of the outer shell portion 63, and the heat-conducting medium 64 and / or potting compound 65 may not be provided. In this embodiment, the channel 193 is located near the middle of the bottom 191 of the first surrounding wall, the outer edge 632 is located at the upper end of the first outer shell portion 631, and the outer edge 632 protrudes radially from the first outer shell portion 631. The sealing portion 633 is integrally formed with the first outer shell portion 631 and is located at the bottom of the first outer shell portion 631. The outer periphery of the first outer shell portion 633 is spaced a certain distance from the inner peripheral wall of the channel 193, thus preventing the heat of the valve body from affecting the temperature sensing unit portion 61.

[0044] Combination Figures 1-16 , Figure 28In this embodiment, the electric valve includes a valve body 1, valve components 2, and an electronic control board 31. The valve body 1 includes a flow channel 14 and a valve component mounting cavity 11. Part of the valve component 2 is located in the valve component mounting cavity 11. The valve body 1 also includes a mounting cavity 15. The electric valve also includes a pressure sensing unit 5. The mounting cavity 15 includes a pressure sensing unit mounting cavity 151. The pressure sensing unit 5 is located in the pressure unit mounting cavity 151. The valve body 1 includes a first mounting surface 111. The electronic control board 31 is located above the first mounting surface 111. The openings of the valve component mounting cavity 11 and the pressure sensing unit mounting cavity 151 are both located on the first mounting surface 111. The pressure sensing unit 5 includes a top part 52 and a bottom part 53. The top part 52 is positioned towards the electronic control board 31 and does not extend beyond the first mounting surface 111. The top part 52 does not include the wires led out from the pressure sensing unit 5. The bottom part 53 is positioned towards the flow channel 14. The pressure sensing unit 5 can sense the pressure of the working medium in the flow channel 14 and generate a pressure signal. The first surface 52 of the pressure sensing unit 5 does not extend beyond the first mounting surface 111 of the valve body 1, which helps to reduce the space occupied by the pressure sensing unit 5, facilitates the layout of the electronic control board 31, and reduces the size of the electric valve. The electric valve also includes a cover plate component 8, the top of which does not extend beyond the first mounting surface 111. The cover plate component 8 includes a first limiting part 81, which abuts against the pressure sensing unit 5 to limit the pressure sensing unit 5. The cover plate component 8 is fixed by riveting, which helps to reduce the size of the electric valve and reduce the space occupied. In this embodiment, the cover plate component 8 includes a cover plate 83, which is located at the upper end of the cover plate component 8, and the top end 84 of the cover plate 83 does not extend beyond the first mounting surface 111. The electric valve also includes a temperature sensing unit 6. The mounting cavity 15 includes a temperature sensing unit mounting cavity 152, with a portion of the temperature sensing unit 6 located within this cavity. The temperature sensing unit 6 includes a top portion 67, which faces the direction of the electronic control board 31. The top portion 67 does not extend beyond the first mounting surface 111 and does not include any wires extending from the temperature sensing unit 6. The fact that the top portion 67 of the temperature sensing unit 6 does not extend beyond the first mounting surface 111 of the valve body helps reduce the space occupied by the temperature sensing unit 6, facilitating the layout of the electronic control board 31 and reducing the size of the electric valve. The cover plate component 8 also includes a second limiting part 82, which abuts against a portion of the top surface 67 of the temperature sensing unit 6 to limit the temperature sensing unit 6. The temperature sensing unit 6 includes a cylindrical part 64, with its upper end surface serving as the top surface 67. The lower end surface of the second limiting part 82 abuts against the top surface 67, thus limiting the temperature sensing unit 6. The upper end surface of the cylindrical part 64 does not extend beyond the first mounting surface 111, and the top surface 67 of the temperature sensing unit 6 does not extend beyond the first mounting surface 111. This also helps to reduce the volume of the electric valve and the space occupied. In this embodiment, the top end 84 of the cover plate component 8 is set not to extend beyond the first mounting surface 111, which also helps to reduce the space occupied by the cover plate component.In one embodiment of the electric valve, the bottom surface of the electric control board 31 is close to the first mounting surface 111. The electric control board 31 has a metal contact portion that is connected to the grounding terminal of the electric control board. The metal contact portion can abut against the riveting portion, thereby connecting the grounding terminal of the electric control board to the valve body. This helps to further improve the reliability of grounding.

[0045] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. An electric valve, comprising a valve body having a flow passage and a mounting cavity, the electric valve further comprising a pressure sensing unit, the mounting cavity including a pressure sensing unit mounting cavity, at least a portion of the pressure sensing unit being located within the pressure sensing unit mounting cavity, characterized in that, The electric valve further includes a cover plate component, which includes a first limiting portion. The valve body also includes a riveting portion, which abuts against one side of the cover plate component to limit its position. The first limiting portion abuts against the pressure sensing unit, confining the pressure sensing unit within its mounting cavity. The pressure sensing unit can sense the pressure of the working medium within the flow channel. The valve body includes a bottom surface of a first stepped portion, with a portion of the bottom surface of the first limiting portion abutting against the bottom surface of the first stepped portion, and a portion of the bottom surface of the first limiting portion abutting against the pressure sensing unit. The electric valve also includes a first sealing element, located at the lower end of the pressure sensing unit. The valve body has a first wall bottom surface, with the first sealing element located between the bottom surface of the pressure sensing unit and the first wall bottom surface. The bottom surface of the pressure sensing unit abuts against and presses against the first sealing element.

2. The motorized valve of claim 1, wherein, The electric valve further includes a temperature sensing unit, and the mounting cavity includes a temperature sensing unit mounting cavity. At least a portion of the temperature sensing unit is located in the temperature sensing unit mounting cavity. The temperature sensing unit is capable of sensing the temperature of the working medium in the flow channel. The cover plate component includes a second limiting part, which abuts against the temperature sensing unit and limits the temperature sensing unit to the temperature sensing unit mounting cavity.

3. The motorized valve of claim 2, wherein, The electric valve further includes an electric control board and a connecting plate. The pressure sensing unit is electrically connected and / or signal-connected to the connecting plate, and the temperature sensing unit is electrically connected and / or signal-connected to the connecting plate. The electric valve also includes a connecting component. The electric control board and the connecting plate are electrically connected and / or signal-connected through the connecting component. The cover plate component further includes a cover plate with a first hole. The connecting component can pass through the first hole. One end of the connecting component abuts against the electric control board, and the other end of the connecting component abuts against the connecting plate.

4. The motorized valve of claim 3, wherein, The cover plate component also includes a cylindrical portion, which is integrally formed with the cover plate and protrudes from the cover plate. Part of the connecting component is located in the inner cavity of the cylindrical portion.

5. Motorised valve according to claim 3 or 4, characterised in that The connecting component is an elastic element. The electronic control board includes a first set of metal contact parts, and the connecting plate includes a second set of metal contact parts. The connecting component is in a compressed state. One end of the connecting component is in contact with the first set of metal contact parts, and the other end of the connecting component is in contact with the second set of metal contact parts.

6. The motorized valve of claim 5, wherein, The first limiting part, the second limiting part, and the cover plate are integrally formed. The first limiting part is cylindrical, the second limiting part is cylindrical, and the second limiting part is located on the outer periphery of the first limiting part. The first limiting part and the second limiting part are connected by a transition part or directly connected. The outer diameter of the first limiting part is larger than the outer diameter of the second limiting part. The cover plate is located at one end of the axial direction of the cover plate component.

7. The motorized valve of claim 6, wherein, The connecting plate includes a first plate and a second plate, the first plate and the second plate are integrally formed, the second plate protrudes from the outer edge of the first plate, the second set of metal contact portions are located on the first plate, the connecting plate includes a first set of pads and a second set of pads, the first set of pads are located on the first plate, the second set of pads are located on the second plate, the pressure sensing unit is connected to the first set of pads by welding, and the temperature sensing unit is connected to the second set of pads by welding.

8. The motorized valve of claim 7, wherein, The riveting part includes a first riveting part and a second riveting part. A first groove is processed around the periphery of the mounting cavity. The plate-shaped protrusion between the first groove and the mounting cavity serves as the riveting part. The first riveting part is bent and deformed towards the side where the first limiting part is located by riveting, and abuts against the first limiting part. The second riveting part is bent and deformed towards the side where the second limiting part is located by riveting, and abuts against the second limiting part.

9. The motorized valve according to any of claims 1-4 or 6-8, characterized in that, The pressure sensing unit includes a pressure sensing element, and the valve body further includes a first wall. The first wall is disposed around the mounting cavity of the pressure sensing unit. The first wall includes a first step portion, and the first step portion includes a bottom surface of the first step portion. A portion of the bottom surface of the first limiting portion abuts against the pressure sensing element.

10. The motorized valve of claim 5, wherein, The pressure sensing unit includes a pressure sensing element, and the valve body further includes a first wall. The first wall is disposed around the mounting cavity of the pressure sensing unit. The first wall includes a first step portion, and the first step portion includes a bottom surface of the first step portion. A portion of the bottom surface of the first limiting portion abuts against the pressure sensing element.

11. The motorized valve of claim 9, wherein, The valve body also has a first wall side surface and a first channel. The first channel is located at the middle position of the bottom surface of the first wall. The first wall side surface can cooperate with the peripheral side surface of the pressure sensing unit to limit the radial movement of the pressure sensing element. The pressure sensing element has a pressure sensing part. The working medium in the flow channel can contact the pressure sensing part through the first channel. The bottom surface of the first wall has a first sealing groove. Part of the first sealing element is accommodated in the first sealing groove. The first sealing element is located between the bottom surface of the pressure sensing unit and the first sealing groove. The bottom surface of the pressure sensing element abuts against and presses the first sealing element.

12. The motorized valve of claim 10, wherein, The valve body also has a first wall side surface and a first channel. The first channel is located at the middle position of the bottom surface of the first wall. The first wall side surface can cooperate with the peripheral side surface of the pressure sensing unit to limit the radial movement of the pressure sensing element. The pressure sensing element has a pressure sensing part. The working medium in the flow channel can contact the pressure sensing part through the first channel. The bottom surface of the first wall has a first sealing groove. Part of the first sealing element is accommodated in the first sealing groove. The first sealing element is located between the bottom surface of the pressure sensing unit and the first sealing groove. The bottom surface of the pressure sensing element abuts against and presses the first sealing element.

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