CN210979962U - Self-cleaning device for range hood - Google Patents
Self-cleaning device for range hood Download PDFInfo
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- CN210979962U CN210979962U CN201920629727.4U CN201920629727U CN210979962U CN 210979962 U CN210979962 U CN 210979962U CN 201920629727 U CN201920629727 U CN 201920629727U CN 210979962 U CN210979962 U CN 210979962U
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Abstract
The utility model relates to a range hood is from belt cleaning device, including the motor of drive impeller, the control circuit of control motor just reversing and send the controller that the stop signal sent the stop signal again and carried out rapid braking for control circuit driving motor after sending corotation signal. When the motor runs in a fast forward rotation mode, the controller sends a reverse rotation signal and then sends a stop signal within 2 seconds, and the motor executes a reverse rotation operation program after receiving the reverse rotation signal, so that the inertia of the forward rotation of the motor is counteracted, the motor drives the impeller to rotate rapidly, oil stains are separated from the blades under the principle of the inertia of operation and enter the oil stain collecting device, and the purpose of self-cleaning is achieved. Therefore, the self-cleaning processing is low in cost, convenient to operate and reliable in operation.
Description
Technical Field
The utility model relates to a range hood is from belt cleaning device.
Background
In the prior art, the internal cleaning of the range hood is mainly focused on cleaning a turbine and blades, and two common methods are adopted, namely, a heating pipe is added on a volute to raise the temperature of oil in the volute so that the oil is easy to separate from an impeller, and water cleaning is added, namely, water is sprayed on the impeller by a pump to wash the impeller. The two methods have certain cleaning effect, but have the following problems: (1) the greasy dirt on the back of the blade can not be thoroughly removed; (2) the cost is increased too much; (3) the water washing needs to be periodically added with water.
The motor that present range hood used generally is single phase alternating current motor or direct current brushless motor drive, and interior winding generally adopts T type connection, can not hard stop, and adopts the mode of taking a percentage to control motor speed, accomplishes 3-4 grades of rotational speeds generally. As mentioned above, the existing automatic cleaning methods are not satisfactory, and designing an automatic cleaning apparatus with low cost and convenient operation and a corresponding method are called as problems to be solved in the art.
Chinese patent application No. CN201710569711.4 provides a self-cleaning range hood, which includes a main blower, an air outlet hood disposed at an air outlet of the main blower, and a self-cleaning device, wherein the main blower includes a volute and an impeller disposed in the volute, the self-cleaning device includes a spraying mechanism for discharging a cleaning solution into the volute, and the self-cleaning range hood is characterized in that: the self-cleaning device also comprises a blowing mechanism for blowing the cleaning solution sprayed into the volute to the impeller, wherein the blowing mechanism comprises an air guide pipe communicated with the air outlet cover and a nozzle respectively connected with the air guide pipe and the bottom of the volute. Through setting up and spraying the mechanism and blowing the mechanism, will spray mechanism exhaust washing liquid and blow to the blade of impeller for the washing liquid can cover the scope of blade as low as possible, thereby improves the cleaning performance, and the air current that will go out the fan housing is used for blowing moreover, has just realized range hood inner loop through the water pump.
Above-mentioned patent is through spraying the washing liquid, on blowing the blade of impeller with the washing liquid again, has increased and has sprayed the air supply structure that mechanism, fan and fan are relevant. The structure is complicated, the cost is increased too much, washing liquid needs to be added periodically, and oil stains on the back of the blade cannot be removed thoroughly.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide a range hood self-cleaning device, the processing cost is low, convenient operation, the operation is reliable.
The utility model provides a pair of range hood is from belt cleaning device's main technical scheme does:
the device comprises a motor for driving an impeller, a control circuit for controlling the forward and reverse rotation of the motor, and a control circuit for sending a forward rotation signal, a reverse rotation signal and a stop signal to the control circuit to drive the motor to brake rapidly.
The motor is a unidirectional alternating current motor and comprises a first winding, a second winding, a starting capacitor and a speed-regulating winding unit;
when the controller sends a forward rotation signal, one end of the first winding is communicated with the live wire, the other end of the first winding is communicated with one end of the starting capacitor, the other end of the starting capacitor is communicated with the zero line, one end of the second winding is communicated with the live wire through the speed-regulating winding unit, and the other end of the second winding is communicated with the zero line;
after the controller sends a reverse signal, one end of the second winding is communicated with the live wire, the other end of the second winding is communicated with one end of the starting capacitor, the other end of the starting capacitor is communicated with the zero line, one end of the first winding is communicated with the live wire through the speed-regulating winding unit, and the other end of the first winding is communicated with the zero line.
The controller comprises a self-washing operating switch, wherein the self-washing operating switch is a double-throw switch and comprises a first control end and a second control end; when the first control end is connected, a forward rotation signal is sent to the motor, and when the second control end is connected, a reverse rotation signal is sent to the motor; and an automatic stop device is arranged in the second control end.
The controller comprises a speed regulation winding unit, a speed regulation switch and a control unit, wherein the speed regulation winding unit comprises at least two sub-windings with different coil turns, the sub-windings of the speed regulation winding unit are respectively communicated with corresponding keys on the speed regulation switch.
The automatic cleaning device also comprises an electronic switch panel, and a self-cleaning key for sending self-cleaning to the controller is arranged on the electronic switch panel.
The speed regulation winding unit comprises at least two sub-windings with different coil turns, the electronic switch panel further comprises a wind speed key corresponding to the sub-windings, the sub-windings of the speed regulation winding unit are respectively communicated with the corresponding wind speed keys through drivers, and the drivers comprise relays and triodes.
The motor is a variable frequency motor, a three-phase running winding of the motor is connected with the output end of the controller through a PWM (pulse width modulation) driving circuit, and the variable frequency motor is connected with a micro-processing chip;
when the controller sends a forward rotation signal to the motor, the PWM driving circuit drives the running winding W, V, U in the motor to run according to a preset phase sequence;
when the controller sends a reverse signal to the motor, the phase sequence of the micro-processing chip to W and V or V and U or U and W is changed.
Adopt the utility model provides a pair of range hood is from belt cleaning device, in the quick corotation operation of motor, the controller sends the reversal signal and sends stop signal in 2 seconds again, and the motor implements the reversal function procedure because of receiving the reversal signal to offset the inertia of motor corotation, make the motor drive impeller rotational speed sharply descend, let the greasy dirt break away from the blade and get into greasy dirt collection device under the inertial principle of operation, thereby reach the purpose of automatically cleaning. Therefore, the self-cleaning processing is low in cost, convenient to operate and reliable in operation.
Drawings
FIG. 1 is a schematic diagram of a circuit control of a self-cleaning device of a range hood according to an embodiment of the present invention, wherein the self-cleaning device employs a single-phase AC motor for self-cleaning;
fig. 2 is a structural diagram of a self-cleaning operation switch of a range hood self-cleaning device according to a first embodiment of the present invention;
fig. 3 is a structural diagram of a speed control switch of a self-cleaning device of a range hood according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of the range hood self-cleaning device according to the second embodiment of the present invention, which adopts the electronic control circuit of the single-phase ac motor;
fig. 5 is a schematic control diagram of an electronic control circuit of a motor device adopting a variable frequency motor in a range hood self-cleaning device according to a third embodiment of the invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and the accompanying drawings, wherein the described embodiments are only intended to facilitate the understanding of the present invention, and do not limit the present invention in any way.
Example one
The present embodiment adopts a mechanical switch to control the rapid braking of a single-phase alternating current motor, as shown in fig. 1-3, according to the present embodiment, a self-cleaning device for a range hood is provided, which comprises a motor for driving an impeller, a control circuit for controlling the motor to rotate forward or backward, and a controller 1 for sending a forward signal, then sending a backward signal, and then sending a stall signal to the control circuit to drive the motor to perform rapid braking so as to drive the impeller to perform centrifugal self-cleaning.
The motor of the embodiment is a unidirectional alternating current motor and comprises a first winding R1, a second winding R2, a starting capacitor C and a speed regulation winding unit (L1, L2 and L3), when a controller sends a forward rotation signal, one end of the first winding R1 is communicated with a live wire, the other end of the first winding R1 is communicated with one end of the starting capacitor C, the other end of the starting capacitor C is communicated with an N2 end of a zero line, one end of the second winding R2 is communicated with the live wire through the speed regulation winding unit (L1, L2 and L3), the other end of the second winding R2 is communicated with an N2 end of the zero line, and an N1 end of the zero line is not communicated.
After the controller sends a reverse signal, one end of the second winding R2 is communicated with the live wire, the other end of the second winding R2 is communicated with one end of the starting capacitor C, one end of the starting capacitor C is communicated with the N1 end of the zero line, one end of the first winding R1 is communicated with the live wire through the speed-regulating winding unit (L1, L2 and L3), the other end of the first winding R1 is communicated with the N1 end of the zero line, and the N2 end of the zero line is not communicated.
The controller includes a self-washing operation switch. The self-washing operation switch is a double-throw switch and comprises a first control end and a second control end. When the first control end is connected and the second control end is not connected, a forward rotation signal is sent to the motor, and when the second control end is connected and the first control end is not connected, a reverse rotation signal is sent to the motor. The second control end is internally provided with a self-stopping device, and the self-washing operation switch can be automatically stopped after the second control end is switched on.
Preferably, as shown in FIG. 2, the self-washing operation switch is a boat-type switch, and when the A button in the boat-type switch is pressed, N-N2 is communicated, and the motor is positively rotated. When the button B in the ship-shaped switch is pressed, the N-N1 is communicated, the reverse voltage is applied to the motor, and the single-phase alternating current motor is braked emergently. The B button contains a spring type telescopic piece, so that the B button can be single-sided self-reset, after the pressure on the B button is relieved, the B button automatically rebounds, the N-N1 and the N-N2 are both disconnected, and the motor does not rotate reversely or rotate forwardly.
The speed regulation winding unit comprises at least two sub-windings (R3, R4) with different coil turns, the controller further comprises a speed regulation switch, and the sub-windings (R3, R4) of the speed regulation winding unit are respectively communicated with corresponding keys on the speed regulation switch. The motor is regulated through the keys.
Therefore, when the motor runs in a fast forward rotation mode, the controller sends a reverse rotation signal and then sends a stop signal within 2 seconds, and the motor executes a reverse rotation operation program due to the fact that the motor receives the reverse rotation signal, so that inertia of the forward rotation of the motor is offset, the motor drives the impeller to rotate rapidly, oil stains are separated from the blades under the principle of inertia of operation and enter the oil stain collecting device, and the purpose of self-cleaning is achieved. Therefore, the self-cleaning processing is low in cost, convenient to operate and reliable in operation.
Example two
The self-cleaning device of the range hood also comprises a motor for driving an impeller, a control circuit for controlling the motor to rotate forwards or backwards and a controller 1 for sending a forward rotation signal, a reverse rotation signal and a stop signal to the control circuit to drive the motor to brake rapidly and further drive the impeller to perform centrifugal self-cleaning, wherein the motor is a unidirectional alternating current motor and comprises a first winding R1, a second winding R2, a starting capacitor C and a speed-regulating winding unit (L1, L2, L3).
The self-cleaning brake device further comprises an electronic switch panel, wherein the electronic switch panel comprises a self-cleaning key which sends a self-cleaning instruction to the controller, and then the controller sends a forward rotation signal and a reverse rotation signal and then sends a stop signal to the control circuit to drive the motor to perform rapid braking. When the motor runs, the self-cleaning key is triggered, the self-cleaning key sends a self-cleaning instruction to the controller, the controller outputs a reverse signal to the control circuit driving motor to carry out rapid braking, and the controller outputs a stop signal to the control circuit driving motor to stop running at an interval of less than 2 seconds. When the motor does not operate, a self-cleaning key is triggered, the self-cleaning key sends a self-cleaning instruction to the controller, and a forward rotation signal output by the controller is sent to the control circuit to drive the motor to rotate forwards; and the controller outputs a reverse signal to the control circuit driving motor to perform rapid braking, and outputs a stop signal to the control circuit driving motor to stop running at an interval of less than 2 seconds.
The speed regulation winding unit comprises at least two sub-windings with different coil turns, the electronic switch panel further comprises a wind speed key corresponding to the sub-windings, the sub-windings of the speed regulation winding unit are respectively communicated with the corresponding wind speed keys through drivers, and the drivers comprise relays and triodes. One or more MOS transistors or silicon controlled transistors may be used to replace the relay.
Preferably, the speed regulation winding unit comprises three sub speed regulation winding units L1, L2 and L3. if the range hood is in a strong gear operation, a chip program of the controller enables a PA1 pin to output a high level to drive a Q1 triode to be conducted, then a K1 relay is attracted, the end of a motor operation winding L1 is connected with a live wire L. if the range hood is in a medium gear operation, the chip program of the controller enables a PA2 pin to output a high level to drive a Q2 triode to be conducted, then the K2 relay is attracted, the end of a motor operation winding L2 is connected with a live wire L. if the range hood is in a weak gear operation, the chip program of the controller enables a PA3 pin to output a high level to drive a Q3 triode to be conducted, then the K3 relay is attracted, and the end of a motor operation winding L3 is connected with the live wire L.
The self-cleaning method of the range hood comprises the following steps: (1) calculating the forward rotation time length of the motor, starting the subsequent steps if the self-cleaning preset forward rotation time length value is reached, and continuing timing if the self-cleaning preset forward rotation time length value is not reached; (2) sending a reverse operation signal to the motor through switching operation; (3) calculating the time length of the motor receiving the reversal signals, starting the subsequent steps if the time length value of the motor receiving the reversal signals is preset from cleaning, and continuing timing if the time length value of the motor receiving the reversal signals is not preset from cleaning; (4) and sending the signal to a motor stalling signal, and resetting the running time.
In order to ensure reliable operation, the forward rotation time value is preset to be more than 2 seconds, and the time length for receiving the reverse rotation signal is preset to be less than 2 seconds.
Wherein, step (1) is preceded by the following steps: receiving an instruction of starting self-cleaning, detecting whether the motor rotates forwards or not, if the motor rotates forwards, skipping the step (1) and directly operating the step (2), and timing and resetting the operation time; and (4) if the motor is not operated, firstly sending a forward rotation signal to the motor, and then operating the steps (1) to (4).
No matter the motor runs in a strong gear, a middle gear and a weak gear, the motor rotates forwards, the chip program enables a PA4 pin to output a low level, the Q4 triode is cut off, the K4 relay does not attract, and the b normally closed end and the N2 end of the motor winding are connected with a zero line N. When the single-phase alternating current motor operates in positive rotation, the self-cleaning key is triggered, the chip program enables the PA4 pin to output high level, the Q4 triode is conducted, the K4 relay is attracted, the normally open end of the c is closed and connected with the zero line N with the end N1 of the motor winding, the motor is subjected to reverse voltage at the moment, the PA1 pin outputs low level within 2 seconds, and the single-phase alternating current motor is braked emergently.
Therefore, when the motor runs in a fast forward rotation mode, the controller sends a reverse rotation signal and then sends a stop signal within 2 seconds, and the motor executes a reverse rotation operation program due to the fact that the motor receives the reverse rotation signal, so that inertia of the forward rotation of the motor is offset, the motor drives the impeller to rotate rapidly, oil stains are separated from the blades under the principle of inertia of operation and enter the oil stain collecting device, and the purpose of self-cleaning is achieved. Therefore, the self-cleaning processing is low in cost, convenient to operate and reliable in operation.
EXAMPLE III
As shown in fig. 5, the present embodiment adopts a variable frequency motor, and according to the present embodiment, a self-cleaning device for a range hood is provided, which also includes a motor for driving an impeller, a control circuit for controlling the motor to rotate forward or backward, and a controller 1 for sending a forward rotation signal, then sending a backward rotation signal, and then sending a stall signal to the control circuit to drive the motor to perform rapid braking so as to drive the impeller to perform centrifugal self-cleaning.
The motor is a variable frequency motor, a three-phase running winding of the motor is connected with the output end of the controller through a PWM driving circuit, and the variable frequency motor is connected with a microprocessor chip. When the controller sends a forward signal to the motor, the PWM drive circuit drives the run winding W, V, U in the motor to run in a predetermined phase sequence. When the controller sends a reverse signal to the motor, the phase sequence of the micro-processing chip to W and V or V and U or U and W is changed.
The frequency conversion motor is in direct current type or alternating current type, the speed is adjusted through electronic control, and oil is thrown in emergency braking. Based on the GD32F130Cx control chip, with high performance, three independent half-bridge gate drive integrated electronic chips FD6536 are integrated. The variable frequency AC power supply is obtained to control the variable frequency speed regulation of the AC motor.
Diodes DU5/DV5/DW5 and CU5/CV5/CW5 are bootstrap diodes and bootstrap capacitors. And the grid driving integrated electronic chip FD6536, the high-low side IGBTs Q51Q52, Q53Q54 and Q55Q56 complete the charging and discharging process, so that one PWM period is realized.
R11R21, R12R22, R13R23, R14R24, R15R25 and R16R26 are gate bias circuits of the IGBT, and when the voltage between a gate (G) and a source (S) electrode is larger than the threshold value of the IGBT, preferably, the threshold value is 10-15V, the IGBT is completely conducted.
Therefore, when the variable frequency motor runs in the fast forward rotation mode, the controller sends a reverse rotation signal and then sends a stop signal within 2 seconds, and the motor executes a reverse rotation operation program due to the fact that the motor receives the reverse rotation signal, so that inertia of the forward rotation of the motor is offset, the motor drives the impeller to rapidly reduce the rotating speed, oil stains are separated from the blades under the principle of running inertia and enter the oil stain collecting device, and the purpose of self-cleaning is achieved. Therefore, the self-cleaning processing is low in cost, convenient to operate and reliable in operation.
The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the ordinary changes and replacements performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A self-cleaning device of a range hood is characterized by comprising a motor for driving an impeller, a control circuit for controlling the motor to rotate forward and backward, and a controller for sending a forward rotation signal and a backward rotation signal and then sending a stop signal to the control circuit to drive the motor to brake rapidly within 2 seconds.
2. The range hood self-cleaning device according to claim 1, wherein the motor is a unidirectional ac motor, and comprises a first winding, a second winding, a starting capacitor, and a speed regulation winding unit;
when the controller sends a forward rotation signal, one end of the first winding is communicated with the live wire, the other end of the first winding is communicated with one end of the starting capacitor, the other end of the starting capacitor is communicated with the zero line, one end of the second winding is communicated with the live wire through the speed-regulating winding unit, and the other end of the second winding is communicated with the zero line;
after the controller sends a reverse signal, one end of the second winding is communicated with the live wire, the other end of the second winding is communicated with one end of the starting capacitor, the other end of the starting capacitor is communicated with the zero line, one end of the first winding is communicated with the live wire through the speed-regulating winding unit, and the other end of the first winding is communicated with the zero line.
3. The range hood self-cleaning device of claim 2, wherein the controller comprises a self-cleaning switch, the self-cleaning switch is a double-throw switch comprising a first control terminal and a second control terminal; when the first control end is connected, a forward rotation signal is sent to the motor, and when the second control end is connected, a reverse rotation signal is sent to the motor; and an automatic stop device is arranged in the second control end.
4. The range hood self-cleaning device according to claim 3, wherein the speed regulation winding unit comprises at least two sub-windings with different numbers of turns of the coil, the controller further comprises a speed regulation switch, and the sub-windings of the speed regulation winding unit are respectively communicated with corresponding keys on the speed regulation switch.
5. The self-cleaning apparatus of claim 2, further comprising an electronic switch panel, wherein the electronic switch panel comprises a self-cleaning button for self-cleaning to the controller.
6. The range hood self-cleaning device according to claim 5, wherein the speed regulation winding unit comprises at least two sub-windings with different coil turns, the electronic switch panel further comprises a wind speed key corresponding to the sub-windings, the sub-windings of the speed regulation winding unit are respectively communicated with the corresponding wind speed keys through drivers, and the drivers comprise relays and triodes.
7. The range hood self-cleaning device according to claim 1, wherein the motor is a variable frequency motor, a three-phase running winding of the motor is connected with an output end of the controller through a PWM driving circuit, and the variable frequency motor is connected with a microprocessor chip;
when the controller sends a forward rotation signal to the motor, the PWM driving circuit drives the running winding W, V, U in the motor to run according to a preset phase sequence;
when the controller sends a reverse signal to the motor, the phase sequence of the micro-processing chip to W and V or V and U or U and W is changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920629727.4U CN210979962U (en) | 2019-05-06 | 2019-05-06 | Self-cleaning device for range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920629727.4U CN210979962U (en) | 2019-05-06 | 2019-05-06 | Self-cleaning device for range hood |
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| Publication Number | Publication Date |
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| CN210979962U true CN210979962U (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920629727.4U Active CN210979962U (en) | 2019-05-06 | 2019-05-06 | Self-cleaning device for range hood |
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| CN (1) | CN210979962U (en) |
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- 2019-05-06 CN CN201920629727.4U patent/CN210979962U/en active Active
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