CN116804441A - Electric valve - Google Patents

Abstract

The invention discloses an electric valve, which comprises a valve cavity part and a valve core, wherein the valve cavity part is provided with a valve cavity and a communication port, the valve core is positioned in the valve cavity and can rotate relative to the valve cavity part, the valve core comprises a first bottom wall part, the valve cavity part comprises a second bottom wall part, the second bottom wall part and the first bottom wall part are arranged along the rotation axis of the valve core, the first bottom wall part is provided with a circulation groove and a conduction channel, the conduction channel is communicated with the corresponding circulation groove, the conduction channel and the circulation groove can be communicated with the communication port, and the circulation cross section of the circulation groove is smaller than that of the conduction channel; thus, fluid impact and/or instantaneous flow fluctuation in the electric valve are reduced, and the service performance of the electric valve is improved.

Description

Electric valve

Technical Field

The invention relates to the field of fluid control, in particular to an electric valve.

Background

When the electric valve is applied to a thermal management system, different communication ports can be communicated through rotation of the valve core, so that switching of a fluid flow path is realized.

When the fluid flow path is switched, if the communication port is instantaneously conducted or shielded, fluid impact and/or instantaneous flow fluctuation are easily formed, and the service performance of the electric valve is easily affected.

Disclosure of Invention

The invention aims to provide an electric valve, which is convenient for reducing fluid impact and/or instantaneous flow fluctuation in the electric valve and improving the service performance of the electric valve.

The embodiment of the invention provides an electric valve, which comprises a valve cavity part and a valve core, wherein the valve cavity part is provided with a valve cavity and a communication port, the valve core is positioned in the valve cavity and can rotate relative to the valve cavity part, the valve core comprises a first bottom wall part, the valve cavity part comprises a second bottom wall part, the second bottom wall part and the first bottom wall part are arranged along the rotation axis of the valve core, at least part of the communication ports are positioned in the second bottom wall part, the first bottom wall part is provided with a circulation groove and a communication channel, the communication channel is communicated with the corresponding circulation groove, the communication channel and the corresponding circulation groove can be communicated with the communication port, and the circulation cross section of the circulation groove is smaller than that of the communication channel.

According to the electric valve provided by the embodiment of the invention, the first bottom wall part of the valve core and the second bottom wall part of the valve cavity part are arranged along the rotation axis of the valve core, at least part of communication ports are positioned on the second bottom wall part, the communication channels and the corresponding communication grooves can be communicated with the communication ports through the communication channels and the corresponding communication grooves, when the valve core deviates from the communication ports or the communication ports on the second bottom wall part in the rotating process of the valve core, fluid can be communicated with the communication ports through the communication channels and the communication grooves, and because the flow cross section area of the communication grooves is smaller than that of the communication channels, less fluid can flow through the communication ports through the communication grooves.

Drawings

Fig. 1 is a schematic perspective view of an electric valve according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the electrically operated valve shown in FIG. 1 in one of its positions;

fig. 3 is an enlarged schematic view of the structure of one of the electrically operated valves shown in fig. 2 at Q;

FIG. 4 is a schematic perspective view of a valve core according to an embodiment of the present invention in one of the viewing angles;

FIG. 5 is a schematic view of the valve cartridge of FIG. 4 from another perspective;

FIG. 6 is a schematic perspective view of a valve core according to another embodiment of the present invention;

FIG. 7 is a schematic perspective view of one of the spools shown in FIG. 6 from another perspective;

FIG. 8 is a schematic view of a partial cross-sectional structure of a combination of the valve cartridge and the valve chamber portion shown in FIG. 6;

fig. 9 is a schematic cross-sectional structure of one of the spools shown in fig. 6.

Description:

1. an electric valve; 10. a valve cavity; 11. a valve cavity; 12. a communication port; p1, a first port; p2, second port; p3, third port; 13. a second bottom wall portion; 14. a side wall portion; 20. a valve core; 201. a conduction cavity; 21. a first bottom wall portion; 210. a conduction channel; 211. a first channel; 212. a second channel; 213. a flow channel; 214. a first groove; e1, a first proximal end; e2, a first distal end; e3, a second proximal end; e4, a second distal end; 215. a second groove; 216. a third groove; 22. a top wall portion; 23. a connection part; 24. a transmission part; 30. a control assembly; 31. a transmission assembly; 311. a gear assembly; 312. a gear cover; 32. a rotor assembly; 33. a transmission rod; 34. a housing; 35. a sleeve; 40. a valve body; 41. a port; 50. a seal assembly; 51. a sealing seat; 52. an elastic ring.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described hereinafter, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and the specific embodiments. Relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, and do not necessarily require or imply any such actual relationship or order between the elements.

As shown in fig. 1 to 3, the embodiment of the present invention provides an electric valve 1, and the electric valve 1 may be applied to a vehicle thermal management system or an air conditioning system, and particularly may be applied to a refrigerant circulation circuit of a vehicle, and in particular, the electric valve 1 may be used to control on-off of a flow path in the refrigerant circulation circuit and/or adjust the flow rate of a refrigerant.

Further, as shown in fig. 1 to 9, the electric valve 1 includes a valve chamber portion 10 and a valve spool 20, the valve chamber portion 10 having a valve chamber 11 and a communication port 12, the valve spool 20 being located in the valve chamber 11 and rotatable relative to the valve chamber portion 10. The valve body 20 includes a first bottom wall portion 21, and an extending direction of the first bottom wall portion 21 intersects with the rotation axis of the valve body 20, for example, in the present embodiment, the extending direction of the first bottom wall portion 21 is perpendicular to the rotation axis of the valve body 20. The first bottom wall portion 21 has a flow channel 213 and a through channel 210, the through channel 210 communicates with the corresponding flow channel 213, the through channel 210 and the corresponding flow channel 213 can communicate with the communication port 12, and the flow cross-sectional area of the flow channel 213 is smaller than the flow cross-sectional area of the through channel 210.

Here, the correspondence of the through passages 210 with the flow grooves 213 means that the through passages 210 and the flow grooves 213 are in correspondence, and as shown in fig. 1 to 5, one through passage 210 may be in correspondence with and communicate with one flow groove 213 in the first bottom wall portion 21, or as shown in fig. 6 to 9, at least two through passages 210 may be in correspondence with and communicate with one flow groove 213 in the first bottom wall portion 21.

In the embodiment of the invention, by providing the flow channel 213 with a smaller flow cross-section area, when the valve core 20 is in rotation, the flow channel 210 is deviated from the communication port 12 or the communication port 12 is conducted, fluid can be communicated with the communication port 12 through the flow channel 210 and the corresponding flow channel 213, and because the flow cross-section area of the flow channel 213 is smaller than that of the flow channel 210, less fluid can flow through the communication port 12 through the flow channel 213, compared with the case of instantaneously conducting or shielding the communication port, the electric valve 1 provided in the embodiment of the invention can reduce fluid impact and/or instantaneous flow fluctuation in the electric valve 1, and improve the service performance of the electric valve 1.

To achieve the rotation of the valve core 20, please further refer to fig. 2, in some embodiments, the electric valve 1 further includes a control assembly 30, the control assembly 30 includes a housing 34, a stator assembly (not shown in the drawings), a rotor assembly 32, a sleeve 35 and a control board (not shown in the drawings), the housing 34 is fixedly connected with the stator assembly, in this embodiment, the housing 34 may be injection-molded and fixed with the stator assembly into an integral structure or the stator assembly is fixed in the housing 34, the control assembly 30 may be fixedly connected with the valve cavity 10 through fasteners such as screws, the stator assembly and the rotor assembly 32 are sleeved with each other, for example, the stator assembly may be disposed at the periphery of the rotor assembly 32, the sleeve 35 isolates the rotor assembly 32 from the stator assembly, in this embodiment, the rotor assembly 32 is disposed at the inner periphery of the sleeve 35, the stator assembly is disposed at the periphery of the sleeve 35, the control board is disposed in the inner cavity of the housing 34, the control board is electrically connected with the stator assembly and controls the power on or off of the stator assembly, the rotor assembly 32 can generate a magnetic field when the stator assembly is powered, and the rotor assembly 32 can rotate under the action of the magnetic field, so as to drive the valve core 20 to rotate.

Further, in some embodiments, the electric valve 1 further includes a transmission assembly 31, the rotor assembly 32 includes a transmission rod 33, the rotor assembly 32 is in transmission connection with the transmission rod 33, for example, the rotor assembly 32 and the transmission rod 33 may be in interference fit or welded or threaded connection, the transmission assembly 31 includes a gear assembly 311 and a gear cover 312, an inner surface side of the gear cover 312 is provided with a tooth structure and is engaged with the gear assembly 311, the transmission rod 33 is in transmission connection with the gear assembly 311, for example, the transmission rod 33 and the gear assembly 311 are in interference fit or welded or threaded connection or tooth engagement, and an output shaft of the gear assembly 311 is in transmission connection with the valve core 20. When the stator assembly is electrified, the rotor assembly 32 rotates under the action of the magnetic field, the transmission rod 33 drives the gear assembly 311 to rotate, and power is transmitted to the valve core 20 through the gear assembly 311, so that the valve core 20 rotates. Specifically, the valve cartridge 20 includes a transmission portion 24, and an output shaft of the gear assembly 311 is embedded inside the transmission portion 24 to achieve transmission of power between the gear assembly 311 and the valve cartridge 20.

As shown in fig. 1 to 3, a part of the gear cover 312 is sleeved on the outer peripheral side of the gear assembly 311, the gear cover 312 is used as a fixed gear, the gear assembly 311 can be meshed with the gear cover 312 for transmission, the other part of the gear cover 312 is sleeved on the outer peripheral side of the valve core 20, the gear cover 312 at this time forms at least part of the side wall of the valve cavity, the electric valve 1 further comprises a valve body 40, the gear cover 312 is fixedly arranged opposite to the valve body 40, and the gear cover 312 is in sealing connection with the valve body 40.

The valve chamber 10 in the embodiment of the present invention includes the side wall portion 14 and the second bottom wall portion 13, the side wall portion 14 protrudes from the second bottom wall portion 13 in the axial direction of the valve spool 20, the side wall portion 14 and the second bottom wall portion 13 form at least part of the wall portion of the valve chamber 11, at least part of the side wall portion 14 is located in the gear cover 312, the second bottom wall portion 13 is disposed separately from the side wall portion 14 and is connected in a sealing manner, for example, the second bottom wall portion 13 is welded and fixed to the side wall portion 14. Specifically, the second bottom wall portion 13 is located at one end portion of the gear cover 312 and is in sealing connection with the gear cover 312, for example, the second bottom wall portion 13 may be welded with the gear cover 312, the second bottom wall portion 13 and the gear cover 312 may together define the valve chamber 11, the gear cover 312 and the second bottom wall portion 13 are located in the accommodation chamber defined by the valve body 40, and accordingly, the valve body 40 has a port 41, the second bottom wall portion 13 has a communication port 12, the port 41 is located at an outer surface of the electric valve 1, the port 41 communicates with the corresponding communication port 12, and fluid can flow into or out of the electric valve 1 through the port 41, and in the embodiment of the invention, both the side wall portion 14 and the second bottom wall portion 13 have communication ports 12 communicating with the port 41; or in other embodiments the entire number of ports 41 may be located in the second bottom wall portion 13. Through the above arrangement, the control assembly 30, the transmission assembly 31, the valve core 20 and the second bottom wall portion 13 can be formed into a complete modular structure, the modular structure is integrally assembled into the accommodating cavity of the valve body 40, and the modular structure and the valve body 40 are hermetically arranged, so that the modular structure can be matched with various valve bodies, and meanwhile, the manufacturing process of the electric valve can be reduced.

In other embodiments, the gear cover 312 may be only sleeved on the outer peripheral side of the gear assembly 311, and the second bottom wall portion 13 may not be provided, the valve body 40 forms at least part of the side wall and the bottom wall of the valve cavity 11, and the valve core 20 may be directly limited to and connected with the valve body 40 in a sealing manner.

In some embodiments, the valve cavity 10 includes a second bottom wall portion 13, the second bottom wall portion 13 is disposed opposite to the first bottom wall portion 21, and the second bottom wall portion 13 and the first bottom wall portion 21 are arranged along a rotation axis of the valve core 20, that is, the second bottom wall portion 13 and the first bottom wall portion 21 are arranged along an axial direction of the valve core 20 in the drawing, at least a part of the valve core 20 and at least a part of the second bottom wall portion 13 are slidably disposed, at least a part of the communication ports 12 are located in the second bottom wall portion 13, the communication groove 213 is recessed from the first bottom wall portion 21 toward a surface of the second bottom wall portion 13 toward an inside of the first bottom wall portion 21, and the communication channel 210 penetrates the first bottom wall portion 21. Through the above arrangement, when the valve core 20 is rotated and the communication port 12 is deviated or the communication port 12 is communicated, the fluid can be communicated with the communication port 12 through the corresponding communication groove 213.

As shown in fig. 2 and 3, in order to provide the electric valve 1 with better sealing performance, in some embodiments, the electric valve 1 further includes a sealing assembly 50, where the sealing assembly 50 includes a sealing seat 51 and an elastic ring 52, the sealing seat 51 is sandwiched between the first bottom wall portion 21 and the elastic ring 52 along the axial direction of the valve core 20, and the elastic ring 52 is sandwiched between the sealing seat 51 and the second bottom wall portion 13. The seal seat 51 is preferably brought into contact with the first bottom wall portion 21 of the valve body 20 by elastic deformation of the elastic ring 52.

In some embodiments, the communication port 12 of the valve cavity 10 includes a first port P1, a second port P2, and a third port P3, and the electric valve 1 in the embodiment of the present invention may be a three-way valve, and the valve core 20 may be capable of communicating at least one of the first port P1 and the second port P2 with the third port P3. Wherein the first port P1, the second port P2 and the third port P3 may be located at the second bottom wall portion 13, or a part of the number of communication ports 12 may be located at the second bottom wall portion 13.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the communication port 12 located at the second bottom wall portion 13 includes a first port P1 and a second port P2 that are disposed at intervals, the third port P3 is located at the side wall portion 14, the third port P3 may be an inlet, the first port P1 and the second port P2 are outlets, or the third port P3 may be an outlet, and the first port P1 and/or the second port P2 are inlets. Here, the third port P3 is taken as an inlet, and the first port P1 and the second port P2 are taken as outlets. The through passage 210 includes a first passage 211 and a second passage 212, the first passage 211 and the corresponding flow groove 213 being capable of communicating the first port P1, and the second passage 212 and the corresponding flow groove 213 being capable of communicating the second port P2. In the first bottom wall portion 21, a first passage 211 and a second passage 212 are provided in isolation, the first passage 211 communicates with a corresponding flow groove 213, the second passage 212 communicates with a corresponding flow groove 213, the first passage 211 and the second passage 212 are arranged around the rotation axis of the spool 20, and the flow groove 213 extends around the rotation axis of the spool 20. Through the above arrangement, the circulation groove 213 can conduct the first port P1 and the second port P2 in the rotation process of the valve core 20, so as to prevent the instant conduction or shielding of the communication port 12 caused by the mutual switching of the communication of the third port P3 and the first port P1 and the communication of the third port P3 and the second port P2, improve the sudden flow fluctuation and the fluid force impact of the electric valve 1, and improve the service life and the service performance of the parts of the electric valve 1.

As shown in fig. 5, in some embodiments, the first passage 211 and the second passage 212 each penetrate the first bottom wall portion 21 in the axial direction of the spool 20; in the cross section of the valve body 20 obtained by cutting the first bottom wall portion 21 perpendicular to the rotation axis of the valve body 20, the extension line of the center line of the flow groove 213 coincides with the circular arc line passing through the center of the first passage 211 and the center of the second passage 212. Through the arrangement, the communication port 12 is conducted by the communication groove 213, and a better throttling function of the electric valve 1 is realized.

Referring to fig. 4 and 5, in some embodiments, the flow-through groove 213 includes a first groove 214 and a second groove 215, the first groove 214 corresponds to and communicates with the first channel 211, the second groove 215 corresponds to and communicates with the second channel 212, the first groove 214 extends from the first channel 211 away from the second channel 212, the second groove 215 extends from the second channel 212 away from the first channel 211, and the flow-through groove 213 communicates with the flow-through channels 210 on the first bottom wall 21 in a one-to-one correspondence manner, and the first groove 214 and the second groove 215 are isolated from each other on the first bottom wall 21.

To achieve a better throttling function of the electric valve 1, in some embodiments, the end of the first groove 214, which is in communication with the first channel 211, is defined as a first proximal end E1, the end of the first groove 214, which is far from the first channel 211, is defined as a first distal end E2, and the flow cross-sectional area of the first groove 214 decreases along the direction that the first proximal end E1 approaches the first distal end E2; and/or defining the end of the second groove 215 communicating with the second channel 212 as a second proximal end E3, the end of the second groove 215 away from the second channel 212 as a second distal end E4, and the flow cross-sectional area of the second groove 215 decreases along the direction in which the second proximal end E3 approaches the second distal end E4. At this time, the cross-sectional structure of the first groove 214 and/or the second groove 215 is similar to a triangle, the first groove 214 and/or the second groove 215 is a wedge-shaped groove, and when the wedge-shaped groove enables the third port P3 to be communicated with the first port P1 and the third port P3 to be communicated with the second port P2 to be mutually switched, the conducting area or the shielding cross section of the first port P1 and the second port P2 is in a slow gradual transition, so that the sudden flow fluctuation and the fluid force impact caused by instantaneous conduction or shielding of the communication port 12 are improved, and the service life and the service performance of valve parts can be improved.

In particular, the cross-sectional flow area of the first groove 214 increases and the cross-sectional flow area of the second groove 215 decreases in the direction of rotation of the valve element 20; or the flow cross-sectional area of the first groove 214 decreases and the flow cross-sectional area of the second groove 215 increases in the direction of rotation of the spool 20. The explanation will be given taking as an example that the communication between the third port P3 and the first port P1 is switched to the communication between the third port P3 and the second port P2. When the third port P3 communicates with the first port P1, the first channel 211 may be in an all-pass state with the first port P1, and as the valve core 20 rotates, the first channel 211 communicates with the first port P1 when deviating from the first port P1, so that the first port P1 is gradually closed in a small flow rate, and before the second channel 212 gradually approaches the second port P2, the second channel 215 communicates with the second port P2, and as the valve core 20 rotates, the flow area of the second channel 215 and the second port P2 gradually increases and transits, and then the second channel 212 gradually approaches the second port P2 to communicate, so as to better improve the sudden flow fluctuation and the fluid force impact caused by the instantaneous conduction or shielding of the communication port 12.

As shown in fig. 6 to 9, the embodiment of the present invention further provides another valve core 20, in some embodiments, the flow channel 213 includes a third channel 216, the third channel 216 is located between the first channel 211 and the second channel 212, one end of the third channel 216 is correspondingly communicated with the first channel 211, and the other end of the third channel 216 is correspondingly communicated with the second channel 212. In some embodiments, the cross-sectional flow area of the third groove 216 is the same along the extension of the centerline of the third groove 216. Through the above arrangement, when the on or off states of the first port P1 and the second port P2 are switched to each other, the fluid can circulate through the third groove 216, so that the electric valve 1 has a throttling function, and sudden flow fluctuation and fluid force impact caused by instantaneous conduction or shielding of the communication port 12 are improved.

In the present embodiment, the switching of the communication between the third port P3 and the first port P1 to the communication between the third port P3 and the second port P2 will be described with reference to fig. 6 to 9. When the third port P3 communicates with the first port P1, the first channel 211 may be in an all-pass state with the first port P1, and during the rotation of the valve core 20, the first channel 211 gradually deviates from the first port P1, and when the valve core 20 rotates to the state of fig. 8, the first channel 211, the third groove 216 and the second channel 213 conduct the first port P1 and the second port P2, and at this time, the second port P2 is in a gradually conducting state; as the valve body 20 continues to rotate, the third groove 216 and the second passage 213 gradually conduct the second port P2 until the second port P2 is in the full-on state and the first port P1 is in the closed state. By the arrangement, the fluid impact and/or instantaneous flow fluctuation of the electric valve 1 can be reduced, and the service performance of the electric valve 1 can be improved

To achieve the flow path switching function of the electric valve 1, in some embodiments, the valve core 20 further includes a top wall portion 22 and a connecting portion 23, the top wall portion 22 and the first bottom wall portion 21 are arranged along the axial direction of the valve core 20, the connecting portion 23 is connected between the top wall portion 22 and the first bottom wall portion 21, a conduction chamber 201 is defined between the top wall portion 22 and the first bottom wall portion 21, the conduction chamber 201 is in communication with the conduction channel 210, and the conduction chamber 201 is capable of communicating with the third port P3.

With further reference to fig. 1-9, in some embodiments, the conducting chamber 201 extends along the circumferential direction of the valve core 20 toward the conducting port of the valve cavity 10 for a whole circumference, at this time, when the valve core 20 rotates to any position, the conducting port communicates with the third port P3, and the conducting port and the third port P3 are in a normal open state. Through the arrangement, the pressure loss generated by the fluid flowing between the third port P3 and the conducting port can be reduced better, at the moment, the top wall part 22 and the first bottom wall part 21 can be connected only through the connecting part 23 in a supporting way, and the rest positions are hollow, so that the valve core 20 is simple in structure and easy to manufacture, the problem of alignment of the third port P3 and the conducting port in the rotating process of the valve core 20 and the valve core 20 in the assembling process is not needed to be considered, the assembling difficulty is reduced, and the valve core 20 in the embodiment of the invention is beneficial to reducing the pressure loss and can improve the fluid flow characteristic.

In summary, according to the electric valve 1 provided in the embodiment of the present invention, the first bottom wall portion 21 of the valve core 20 is provided with the conducting channel 210 and the flow groove 213, the conducting channel 210 and the flow groove 213 can be communicated with the communication port 12, and the conducting channel 210 is communicated with the corresponding flow groove 213, so that when the valve core 20 deviates from the communication port 12 or the communication port 12 in the rotation process, the fluid can be communicated with the communication port 12 through the flow groove 213, and because the flow cross-sectional area of the flow groove 213 is smaller than that of the conducting channel 210, less fluid can flow through the communication port 12 through the flow groove 213.

It should be noted that: the above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, for example, the directional definitions of "front", "rear", "left", "right", "upper", "lower", etc. although the present invention has been described with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified, combined or substituted by equivalent thereto, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. The utility model provides an electric valve, its characterized in that, electric valve includes valve pocket portion and case, valve pocket portion has valve pocket and intercommunication mouth, the case is located the valve pocket just can rotate for valve pocket portion, the case includes first diapire portion, valve pocket portion includes second diapire portion, second diapire portion with first diapire portion is followed the rotation axis of case arranges, at least partial quantity the intercommunication mouth is located second diapire portion, first diapire portion has circulation groove and conduction channel, conduction channel and correspondence the circulation groove intercommunication, conduction channel and correspondence the circulation groove can with the intercommunication mouth intercommunication, the cross-sectional area of circulation groove is less than the cross-sectional area of circulation of conduction channel.

2. The electrically operated valve according to claim 1, wherein the second bottom wall portion is provided opposite to the first bottom wall portion, the flow channel is recessed from a surface of the first bottom wall portion toward the second bottom wall portion toward an inside of the first bottom wall portion, and the conduction path penetrates the first bottom wall portion.

3. The electrically operated valve according to claim 2, wherein the communication port provided in the second bottom wall portion includes a first port and a second port provided at an interval, the conduction path includes a first path and a second path, the first path and the corresponding flow-through groove are capable of communicating the first port, and the second path and the corresponding flow-through groove are capable of communicating the second port;

in the first bottom wall portion, the first channel and the second channel are separately disposed, the first channel is communicated with the corresponding circulation groove, the second channel is communicated with the corresponding circulation groove, the first channel and the second channel are arranged around the rotation axis of the valve core, and the circulation groove extends around the rotation axis of the valve core.

4. The electrically operated valve according to claim 3, wherein the first passage and the second passage each penetrate the first bottom wall portion in an axial direction of the spool;

in the valve element cross section obtained by cutting the first bottom wall portion along a rotation axis perpendicular to the valve element, an extension line of a center line of the flow groove coincides with an arc line passing through a center of the first passage and a center of the second passage.

5. The electrically operated valve of claim 3 wherein said flow-through channel comprises a first channel in corresponding communication with said first passageway and a second channel in corresponding communication with said second passageway, said first channel extending from said first passageway in a direction away from said second passageway, said second channel extending from said second passageway in a direction away from said first passageway;

in the first bottom wall portion, the first groove and the second groove are isolated from each other.

6. The electrically operated valve of claim 5 wherein a first proximal end is defined at an end of said first slot in communication with said first passageway, a first distal end is defined at an end of said first slot remote from said first passageway, and a cross-sectional flow area of said first slot decreases in a direction toward said first distal end along said first proximal end;

and/or defining one end of the second groove communicated with the second channel as a second proximal end, one end of the second groove far away from the second channel as a second distal end, and the flow cross section area of the second groove is decreased along the direction that the second proximal end is close to the second distal end.

7. The electrically operated valve of claim 3 wherein said flow-through groove comprises a third groove, said third groove being located between said first and second passages, and wherein one end of said third groove is in corresponding communication with said first passage and the other end of said third groove is in corresponding communication with said second passage.

8. The electrically operated valve of claim 7 wherein the third groove has the same cross-sectional flow area along the direction of extension of the centerline of the third groove.

9. The electrically operated valve according to any one of claims 3 to 8, wherein the valve chamber portion further includes a side wall portion protruding from the second bottom wall portion in an axial direction of the spool, the communication port further includes a third port located at the side wall portion, and the spool is capable of communicating at least one of the first port and the second port with the third port.

10. The electrically operated valve of claim 9, wherein the valve spool further comprises a top wall portion and a connecting portion, the top wall portion and the first bottom wall portion being arranged in an axial direction of the valve spool, the connecting portion being connected between the top wall portion and the first bottom wall portion, a conduction chamber being defined between the top wall portion and the first bottom wall portion, the conduction chamber being in communication with the conduction channel, the conduction chamber being capable of communicating with the third port.