CN216158310U

CN216158310U - Electric valve

Info

Publication number: CN216158310U
Application number: CN202121537016.8U
Authority: CN
Inventors: 刘明雄; 余丹阳; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-04-01
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses an electric valve, which comprises a valve body with a vent, and further comprises a driving motor, an angle measuring device, a rotating shaft, a valve plate and a controller, wherein the driving motor is arranged on the valve body, the output end of the driving motor is connected with the rotating shaft through the angle measuring device so that the driving motor drives the angle measuring device and the rotating shaft to synchronously rotate, the valve plate is arranged at the position of the vent, the valve plate is connected with one end, far away from the driving motor, of the rotating shaft, the controller is electrically connected with the driving motor and the angle measuring device respectively, the opening degree of the valve plate is detected through the action of the angle measuring device, and the controller controls the opening degree of the valve plate according to information detected by the angle measuring device. The electric valve has simple structure and can be beneficial to controlling the opening movement of the electric valve.

Description

Electric valve

Technical Field

The utility model relates to the technical field of electric valves, in particular to an electric valve.

Background

In the related technology, most high-rise residences are provided with a common flue, and smoke is exhausted from each floor through a range hood. In the smoke exhaust process of the shared flue, the smoke exhaust effect of users on the lower floor is relatively poor, in order to improve the smoke exhaust effect, a smoke collection exhauster appears in the market, the core of the smoke collection exhauster is an opening valve, and the angles of the opening valves on different floors are different, so that the air volume of the users on the higher floor and the lower floor is consistent, various angle controls and limit controls are generated, the reliability of the angle control of the existing opening valve is not high, and the service life of a product is greatly influenced.

Disclosure of Invention

The utility model aims to solve at least one of the problems in the prior art to a certain extent, and provides the electric valve which is simple in structure and can be used for controlling the opening movement of the electric valve.

The above purpose is realized by the following technical scheme:

the utility model provides an electrically operated valve, includes the valve body that has the vent, still includes driving motor, angle measurement device, pivot, valve block and controller, wherein driving motor installs on the valve body, and driving motor's output passes through the angle measurement device with the pivot is connected so that driving motor drives the angle measurement device the pivot is synchronous to be rotated, the valve block sets up vent position department just the valve block with the pivot is keeping away from in driving motor's one end is connected, the controller respectively with driving motor angle measurement device electric connection, through the action of angle measurement device is in order to right the aperture of valve block detects, the controller basis the information control that the angle measurement device detected the aperture of valve block.

In some embodiments, the angle measuring device includes a transmission member, a light barrier, at least one infrared emitter and at least one infrared receiver, wherein one end of the transmission member is connected to the output end of the driving motor, and the other end of the transmission member passes through the light barrier and then is connected to the rotating shaft, a plurality of through holes are spaced on the light barrier, the infrared emitter and the infrared receiver are respectively disposed at two ends of the light barrier, and the opening degree of the valve plate is detected through combined action of the plurality of through holes, the infrared emitter and the infrared receiver.

In some embodiments, the angle measuring device further includes a fixing bracket, the fixing bracket includes a bottom plate and a first side plate and a second side plate respectively disposed on two sides of the bottom plate, one end of the transmission member is connected to an output end of the driving motor, and the other end of the transmission member sequentially passes through the first side plate, the light barrier, and the second side plate and then is connected to the rotating shaft, the infrared transmitter is disposed on the first side plate, and the infrared receiver is disposed on the second side plate.

In some embodiments, the infrared emitter has a first infrared emitter, a second infrared emitter and a third infrared emitter, wherein the first infrared emitter, the second infrared emitter and the third infrared emitter are respectively arranged on the first side plate at intervals along the rotation direction of the transmission piece;

the infrared receiver is provided with a first infrared receiver, a second infrared receiver and a third infrared receiver, wherein the first infrared receiver, the second infrared receiver and the third infrared receiver are respectively arranged on the second side plate at intervals along the rotating direction of the transmission piece;

the through hole is provided with a first through hole, a second through hole, a third through hole, a fourth through hole and a fifth through hole, and the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole are respectively arranged on the light barrier at intervals along the rotating direction of the transmission member.

In some embodiments, the valve further comprises a limiting part arranged on the valve body to limit the movement of the valve plate.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

1. the electric valve has simple structure and is beneficial to controlling the opening movement of the electric valve.

Drawings

Fig. 1 is a schematic structural diagram of an electrically operated valve in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a portion of an electric valve according to an embodiment of the present invention;

FIG. 3 is a schematic view of the construction of an angle measuring device according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of an angle measuring device in a first open position in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of an angle measuring device in a second open position in accordance with an embodiment of the present invention;

FIG. 6 is a cross-sectional view of an angle measuring device in a third open position in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view of an angle measuring device in a fourth angular position in accordance with an embodiment of the present invention;

FIG. 8 is a cross-sectional view of an angle measuring device at a fifth opening position in accordance with an embodiment of the present invention;

FIG. 9 is a cross-sectional view of an angle measuring device in an embodiment of the present invention in a sixth open position;

FIG. 10 is a cross-sectional view of an angle measuring device in an embodiment of the present invention at a seventh open position;

FIG. 11 is a cross-sectional view of an angle measuring device in an eighth open position in accordance with an embodiment of the present invention;

FIG. 12 is a cross-sectional view of an angle measuring device at a ninth opening position in accordance with an embodiment of the present invention;

FIG. 13 is a cross-sectional view of an angle measuring device at a tenth opening position in accordance with an embodiment of the present invention;

FIG. 14 is a flow chart illustrating a method of controlling an electric valve in an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the claims of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 13, this embodiment provides an electric valve, including the valve body 1 that has the vent 11, still include driving motor 2, angle measurement device 3, the pivot, valve block 12 and controller, wherein driving motor 2 installs on valve body 1, and driving motor 2's output passes through angle measurement device 3 and is connected so that driving motor 2 drives angle measurement device 3, the pivot is synchronous to rotate, valve block 12 sets up in vent 11 position department and valve block 12 is connected in the one end of keeping away from driving motor 2 with the pivot, the controller respectively with driving motor 2, angle measurement device 3 electric connection, detect with the aperture to valve block 12 through angle measurement device 3's action, the controller controls the aperture of valve block 12 according to the information that angle measurement device 3 detected.

In this embodiment, vent 11 of valve body 1 is linked together with outside public flue, driving motor 2 installs on valve body 1 and is located vent 11's top position department, and driving motor 2's output is connected with the pivot and is made rotary motion around driving motor 2 with the drive pivot, thereby it is rotatory around driving motor 2's center pin to drive valve block 12, and then realize the work of opening and shutting of valve body 1 vent 11, the action through angle measuring device 3 is in order to detect the aperture of valve block 12, the controller is according to the information control valve block 12's that angle measuring device 3 detected aperture, moreover, the steam generator is simple in structure, can do benefit to and control the aperture motion of motorised valve.

Further, the angle measuring device 3 comprises a transmission member 5, a light barrier 6, at least one infrared emitter 7 and at least one infrared receiver 8, wherein one end of the transmission member 5 is connected with the output end of the driving motor 2, the other end of the transmission member penetrates through the light barrier 6 and then is connected with the rotating shaft, a plurality of through holes 4 are formed in the light barrier 6 at intervals, the infrared emitter 7 and the infrared receiver 8 are respectively arranged at two ends of the light barrier 6, and the opening degree of the valve plate 12 is detected through the combined action of the through holes 4, the infrared emitter 7 and the infrared receiver 8.

Preferably, the angle measuring device 3 further comprises a fixing support 9, the fixing support 9 is provided with a bottom plate and a first side plate and a second side plate which are arranged on two sides of the bottom plate respectively, one end of the transmission piece 5 is connected with the output end of the driving motor 2, the other end of the transmission piece penetrates through the first side plate, the light barrier 6 and the second side plate in sequence and then is connected with the rotating shaft, the infrared transmitter 7 is arranged on the first side plate, the infrared receiver 8 is arranged on the second side plate, the structure is simple, and the installation stability of the angle measuring device 3 can be effectively improved.

Specifically, the infrared emitter 7 has a first infrared emitter 71, a second infrared emitter 72 and a third infrared emitter 73, wherein the first infrared emitter 71, the second infrared emitter 72 and the third infrared emitter 73 are respectively arranged on the first side plate at intervals along the rotation direction of the transmission piece 5;

the infrared receiver 8 is provided with a first infrared receiver, a second infrared receiver and a third infrared receiver, wherein the first infrared receiver, the second infrared receiver and the third infrared receiver are respectively arranged on the second side plate at intervals along the rotating direction of the transmission piece 5;

the through hole 4 is provided with a first through hole 41, a second through hole 42, a third through hole 43, a fourth through hole 44 and a fifth through hole 45, the first through hole 41, the second through hole 42, the third through hole 43, the fourth through hole 44 and the fifth through hole 45 are respectively arranged on the light barrier 6 at intervals along the rotating direction of the transmission piece 5, the design is reasonable and ingenious, and the reliability of angle detection of the angle measuring device 3 can be further improved.

Particularly, the valve further comprises a limiting part which is arranged on the valve body 1 to limit the movement of the valve plate 12, the valve is reasonable in design, the opening movement of the valve plate 12 can be further limited effectively, and therefore the service life of a product is prolonged.

In this embodiment, the fixing bracket 9 has a bottom plate and a first side plate and a second side plate respectively disposed at two sides of the bottom plate, the light barrier 6 is disposed at a middle position between the first side plate and the second side plate, one end of the transmission member 5 is connected to the output end of the driving motor 2, and the other end of the transmission member passes through the first side plate, the light barrier 6 and the second side plate in sequence and then is connected to the rotating shaft, so that the driving motor 2 drives the light barrier 6 and the rotating shaft to rotate synchronously, the first infrared emitter 71, the second infrared emitter 72 and the third infrared emitter 73 are respectively disposed on the first side plate at intervals along the rotating direction of the transmission member 5, such that the first infrared emitter 71, the second infrared emitter 72 and the third infrared emitter 73 are arranged in an arc-shaped interval arrangement at equal intervals, the first infrared receiver, the second infrared receiver and the third infrared receiver are respectively disposed on the second side plate at intervals along the rotating direction of the transmission member 5, the first infrared receiver, the second infrared receiver and the third infrared receiver are arranged in an equidistant arc interval manner, so that the first infrared receiver, the second infrared receiver and the third infrared receiver are respectively arranged corresponding to the first infrared emitter 71, the second infrared emitter 72 and the third infrared emitter 73, the through hole 4 is provided with a first through hole 41, a second through hole 42, a third through hole 43, a fourth through hole 44 and a fifth through hole 45, the first through hole 41, the second through hole 42, the third through hole 43, the fourth through hole 44 and the fifth through hole 45 are respectively arranged on the light barrier 6 at intervals along the rotating direction of the transmission member 5, infrared rays emitted by the first infrared emitter 71, the second infrared emitter 72 and the third infrared emitter 73 can pass through the through holes 4 and then be emitted to the corresponding receivers, the confirmation of the opening and closing position of the valve plate 12 is detected by a photoelectric sensor, the position change is through detecting infrared receiver 8 whether receive the infrared ray that infrared emitter 7 sent and judge the change of position, and single group infrared emitter 7 can only judge the relative displacement of valve block 12, receives through adopting multiunit infrared emitter 7 to combine through-hole 4 on the barn door 6, thereby can detect the absolute position of photoelectric tube, moving direction and speed, and then detect with the aperture to valve block 12 through a plurality of through-holes 4, infrared emitter 7, infrared receiver 8's combined action.

In this embodiment, the opening range of the valve plate 12 is sequentially divided into a first opening position, a second opening position, a third opening position, a fourth opening position, a fifth opening position, a sixth opening position, a seventh opening position, an eighth opening position, a ninth opening position, and a tenth opening position according to a preset angle value in advance, in this embodiment, the preset angle value may be preferably set to 90 °, but is not limited to the above angle value, and may also be selected to be other more suitable angle values according to actual requirements, in this embodiment, the preset angle value is described by way of example of 90 °, other angle values are not repeated, correspondingly, the first opening position is 0 °, the second opening position is 10 °, the third opening position is 20 °, the fourth opening position is 30 °, the fifth opening position is 40 °, the sixth opening position is 50 °, and the like, The seventh opening position is 60 °, the eighth opening position is 70 °, the ninth opening position is 80 ° and the tenth opening position is 90 °;

when the valve plate 12 is at the first opening position, the infrared rays emitted by the first infrared emitter 71, the second infrared emitter 72 and the third infrared emitter 73 cannot pass through the through hole 4 of the light barrier 6 and are emitted to the corresponding receivers, so that the valve plate 12 closes the vent 11;

when the valve plate 12 is at the second opening position, the infrared rays emitted by the first infrared emitter 71 penetrate through the fifth through hole 45 and then are matched and connected with the first infrared receiver;

when the valve plate 12 is located at the third opening position, the infrared rays emitted by the first infrared emitter 71 penetrate through the fourth through hole 44 and then are connected with the first infrared receiver in a matching manner, and the infrared rays emitted by the second infrared emitter 72 penetrate through the fifth through hole 45 and then are connected with the second infrared receiver in a matching manner;

when the valve plate 12 is in the fourth angular position, the infrared rays emitted by the first infrared emitter 71 penetrate through the third through hole 43 and then are connected with the first infrared receiver in a matching manner, meanwhile, the infrared rays emitted by the second infrared emitter 72 penetrate through the fourth through hole 44 and then are connected with the second infrared receiver in a matching manner, and the infrared rays emitted by the third infrared emitter 73 penetrate through the fifth through hole 45 and then are connected with the third infrared receiver in a matching manner;

when the valve plate 12 is at the fifth opening position, the infrared rays emitted by the second infrared emitter 72 pass through the third through hole 43 and then are connected with the second infrared receiver in a matching manner, and the infrared rays emitted by the third infrared emitter 73 pass through the fourth through hole 44 and then are connected with the third infrared receiver in a matching manner;

when the valve plate 12 is at the sixth opening position, the infrared rays emitted by the first infrared emitter 71 penetrate through the second through hole 42 and then are connected with the first infrared receiver in a matching manner, and the infrared rays emitted by the third infrared emitter 73 penetrate through the third through hole 43 and then are connected with the third infrared receiver in a matching manner;

when the valve plate 12 is at the seventh opening position, the infrared rays emitted by the second infrared emitter 72 pass through the second through hole 42 and then are connected with the second infrared receiver in a matching manner;

when the valve plate 12 is at the eighth opening position, the infrared rays emitted by the first infrared emitter 71 penetrate through the first through hole 41 and then are connected with the first infrared receiver in a matching manner, and the infrared rays emitted by the third infrared emitter 73 penetrate through the second through hole 42 and then are connected with the second infrared receiver in a matching manner;

when the valve plate 12 is at the ninth opening position, the infrared rays emitted by the second infrared emitter 72 pass through the first through hole 41 and then are connected with the second infrared receiver in a matching manner;

when the valve plate 12 is at the tenth opening position, the infrared rays emitted by the third infrared emitter 73 pass through the first through hole 41 and then are connected with the third infrared receiver in a matching manner, so that the vent 11 is completely opened by the valve plate 12.

In this embodiment, an inclined surface or a cylinder protrudes from the valve body 1 to form a limiting portion, and an angle of the valve sheet 12 moving to the limiting portion is larger than an angle of the valve sheet 12 moving to a preset angle value, that is, when the valve sheet 12 moves to a tenth opening position, if the valve sheet 12 continues to move forward, the movement of the valve sheet 12 is further limited by the limiting portion, and in this embodiment, the valve sheet 12 stops immediately when being opened to 90 °, so that the blocking rotation of the driving motor 2 is rarely used in an actual use process, and only the limiting portion is added to the valve body 1 to prevent the limiting protection of the driving motor 2 when the driving motor 2 is abnormal, thereby further simplifying the limiting structure of the valve sheet 12. The closed position of valve block 12 is that valve block 12 and valve body 1 become an angle of 90 degrees, because of can be according to angle measuring device 3 measurement and know valve block 12 position, can fix a position the closed position of valve block 12 like this when very little locked-rotor current to avoid valve block 12 and the spacing portion contact of valve body 1 so that driving motor 2 produces the locked-rotor, structure load is very little like this, reliability and life promote.

In this embodiment, the presence or absence of the infrared reception signal constitutes a binary code, that is, every time the distance moved by one opening position is changed to a different code, each position is different. Thus, the rotation angle can be known according to the infrared codes, so that the current position of the valve plate 12 can be known, taking the codes of three infrared devices as an example, the first code is 000, namely the code when the valve plate 12 is at the first opening position is 001, different codes are generated when the light barrier 6 moves by one opening position, so that the second position is 002 code, namely the valve plate 12 rotates to the second opening position, then the third position is 003 or other codes, namely the valve plate 12 rotates to the third opening position or other opening positions, and since the latter code and the former code cannot be the same, the sequence of the last group of codes is 001, 002, 003, 004,005, 006,007,008, 009, 010. In this embodiment, the number of the infrared transmitters 7 and the infrared receivers 8 is not limited to three, and may be four or five, and similarly, the codes of four and five infrared devices may be obtained similarly, the resolution of each angle may be obtained as N power of the total angle/2, and in addition, the resolution of the angle may be further improved according to the time that each opening position passes through.

In this embodiment, the electric valve adopts a photoelectric angle measurement mode, so that the opening degree of the valve plate 12 can be known at any time, and the advantage is that the angle is adjusted directly to a required angle without returning to zero. The limiting method can be simplified, when the rotating mechanism normally rotates, the current can be limited to be larger, the damping is prevented from stopping rotating too much, the opening and closing angle of the valve plate 12 is known, the large current caused by limiting or the large current caused by damping can be judged, the fault can be positioned quickly, unnecessary damage caused by the fault is avoided, meanwhile, the time of the driving motor 2 rotating to the initial position can be judged in advance because the opening and closing angle of the valve plate 12 is known, the rotating mechanism can stop moving after the time is counted down, the stalling current is only slightly larger than normal, the ultra-strong limiting structure and the gearbox bearing are avoided, and the reliability and the service life of the rotating structure are improved.

Example two:

as shown in fig. 1 to 14, this embodiment provides a control method of an electric valve, which is applied to the electric valve described in the first embodiment, and by adopting a photoelectric angle measurement mode, the opening degree of the valve sheet 12 can be known at any time, which has the advantage that the angle does not need to be reset to zero when being adjusted, and the angle is directly adjusted to a required angle, so as to quickly adjust the opening degree of the valve sheet 12.

The control method of the electric valve in the present embodiment includes the steps of:

in step S101, the opening angle of the valve sheet 12 is divided into a plurality of opening positions in advance.

In this embodiment, the opening range of the valve plate 12 is divided into a first opening position, a second opening position, a third opening position, a fourth opening position, a fifth opening position, a sixth opening position, a seventh opening position, an eighth opening position, a ninth opening position and a tenth opening position in sequence, the preset angle range in this embodiment may be preferably set to be 0 ° to 90 °, but not limited to the above angle values, and other more suitable angle values may also be selected and set according to actual requirements, in this embodiment, the preset angle value is described by way of example as 0 ° to 90 °, other angle values are not repeated, correspondingly, the first opening position is 0 °, the second opening position is 10 °, the third opening position is 20 °, the fourth opening position is 30 °, the fifth opening position is 40 °, the sixth opening position is 50 ° (the angle values are set by way of example, and the above-mentioned angle values are not repeated The seventh opening position is 60 °, the eighth opening position is 70 °, the ninth opening position is 80 ° and the tenth opening position is 90 °;

And step S102, the user starts the range hood.

And S103, acquiring a corresponding opening position according to a preset angle value corresponding to the current working condition of the range hood.

In the embodiment, a plurality of opening positions are sequentially set with corresponding position codes according to the sequence;

in the moving process of the valve plate 12, the opening positions of the valve plate 12 passing through are sequentially recorded through the combined action of the first infrared emitter 71, the second infrared emitter 72, the third infrared emitter 73 and the light barrier 6, so that a position code corresponding to the current opening position is obtained;

and processing according to the obtained position code to obtain the current opening value of the valve plate 12.

And step S104, adjusting the opening of the valve plate 12 according to the acquired opening position.

Step S105, detecting the current opening degree of the valve sheet 12 to obtain the current opening degree value of the valve sheet 12.

Step S106, judging whether the current opening value of the valve plate 12 reaches a preset angle value or not;

if so, stopping the opening movement of the valve plate 12;

if not, the valve plate 12 is controlled to continue the opening movement.

In this embodiment, it is determined whether the current opening value of the valve sheet 12 reaches a preset angle value, the opening movement of the valve sheet 12 is controlled according to the determination result, meanwhile, in the opening movement process of the valve plate 12, the valve plate 12 is controlled to stop rotating by judging whether the valve plate 12 moves to the tenth opening position or not, when the valve plate 12 reaches the maximum opening angle, that is, whether the valve sheet 12 reaches the tenth opening position, the angular position of the stopper is set to be larger, such as 120 degrees, therefore, the valve plate 12 can rotate in time when the valve plate rotates to more than 90 degrees without a limiting part, thereby further reduce the stress that receives in the structure operation, avoid the structure motion impaired, valve block 12 removes the angle according to inertia simultaneously, and the time of advance closes driving motor 2, makes valve block 12 stop in predetermineeing angle position department to the realization is controlled the aperture of valve block 12.

Because the resistance of the valve plate 12 in rotation is prevented from being too large, and the opening angle of the valve plate 12 is known in the rotation process, the locked-rotor current can be dynamically set according to the resistance current in operation in the rotation process, namely, the protection current is set in the operation process so as to overcome the resistance without damaging the maximum current of a superstructure, and when the valve plate 12 reaches the limit angle in the opening motion process, the protection current larger than the current operation current value can be output to lock the driving motor 2 so as to stop the opening motion of the valve plate 12, or when the limit angle is exceeded, the valve plate 12 is controlled to rotate so as to timely adjust the opening of the valve plate 12, so that the locked-rotor stress received by the motor structure is minimum, and a motion part is protected.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims

1. The electric valve comprises a valve body (1) with a vent (11), and is characterized by further comprising a driving motor (2), an angle measuring device (3), a rotating shaft, a valve block (12) and a controller, wherein the driving motor (2) is installed on the valve body (1), the output end of the driving motor (2) is connected with the rotating shaft through the angle measuring device (3) so that the driving motor (2) drives the angle measuring device (3) and the rotating shaft synchronously rotates, the valve block (12) is arranged at the position of the vent (11) and is connected with one end of the rotating shaft far away from the driving motor (2), the controller is respectively electrically connected with the driving motor (2) and the angle measuring device (3), and the opening degree of the valve block (12) is detected through the action of the angle measuring device (3), the controller controls the opening degree of the valve plate (12) according to the information detected by the angle measuring device (3).

2. The electric valve according to claim 1, wherein the angle measuring device (3) comprises a transmission member (5), a light barrier (6), at least one infrared emitter (7) and at least one infrared receiver (8), wherein one end of the transmission member (5) is connected to the output end of the driving motor (2), the other end of the transmission member passes through the light barrier (6) and is connected to the rotating shaft, a plurality of through holes (4) are formed in the light barrier (6) at intervals, the infrared emitter (7) and the infrared receiver (8) are respectively arranged at two ends of the light barrier (6), and the opening degree of the valve sheet (12) is detected through the cooperation of the plurality of through holes (4), the infrared emitter (7) and the infrared receiver (8).

3. An electric valve according to claim 2, wherein the angle measuring device (3) further comprises a fixing bracket (9), the fixing bracket (9) has a bottom plate and a first side plate and a second side plate respectively disposed at two sides of the bottom plate, one end of the transmission member (5) is connected to the output end of the driving motor (2), the other end of the transmission member is connected to the rotating shaft after sequentially passing through the first side plate, the light blocking plate (6) and the second side plate, the infrared emitter (7) is disposed on the first side plate, and the infrared receiver (8) is disposed on the second side plate.

4. An electric valve according to claim 3, characterised in that the infrared emitter (7) has a first infrared emitter (71), a second infrared emitter (72) and a third infrared emitter (73), wherein the first infrared emitter (71), the second infrared emitter (72) and the third infrared emitter (73) are respectively arranged on the first side plate at intervals along the rotation direction of the transmission piece (5);

the infrared receiver (8) is provided with a first infrared receiver, a second infrared receiver and a third infrared receiver, wherein the first infrared receiver, the second infrared receiver and the third infrared receiver are respectively arranged on the second side plate at intervals along the rotating direction of the transmission piece (5);

5. the through hole (4) is provided with a first through hole (41), a second through hole (42), a third through hole (43), a fourth through hole (44) and a fifth through hole (45), and the first through hole (41), the second through hole (42), the third through hole (43), the fourth through hole (44) and the fifth through hole (45) are respectively arranged on the light barrier (6) at intervals along the rotating direction of the transmission piece (5).

6. An electric valve according to claim 4, further comprising a limiting portion provided on the valve body (1) to limit the movement of the valve sheet (12).