CN112013430A

CN112013430A - Switch, cooking appliance, control method, control device, and computer-readable storage medium

Info

Publication number: CN112013430A
Application number: CN201910453486.7A
Authority: CN
Inventors: 江德勇; 郑量; 王云峰; 罗绍生
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-12-01
Anticipated expiration: 2039-05-28
Also published as: CN112013430B

Abstract

The invention provides a switch, a cooking appliance, a control method, a control device and a computer readable storage medium. The switch includes: a circuit board; the signal transmitting device and the signal receiving device are correspondingly arranged, and the signal receiving device is connected with the circuit board; the signal shielding device comprises a plurality of shielding pieces which are positioned on the same arc and are sequentially arranged at intervals along the circumferential direction of the arc, and the signal shielding device rotates relative to the signal transmitting device and the signal receiving device so as to enable the shielding pieces to shield or not shield signals between the signal transmitting device and the signal receiving device; wherein, along the circumference of the signal shielding device, the lengths of the plurality of shielding parts are gradually increased or decreased, and/or the distance between two adjacent shielding parts is gradually increased or decreased. The switch provided by the invention judges the rotation direction of the switch according to the time change in the high and low level states, and is simple and convenient and low in cost.

Description

Switch, cooking appliance, control method, control device, and computer-readable storage medium

Technical Field

The present invention relates to the field of kitchen appliances, and more particularly, to a switch, a cooking appliance, a control method, a control apparatus, and a computer-readable storage medium.

Background

The existing rotary encoder determines the direction of rotation by at least the variation asynchronization of 2 signals. J1 and J2 are respectively conducted during the rotation process in FIG. 1. The turning directions are different, and the turn-on sequence of J1 and J2 is different.

In a related art, the judgment of the rotating direction is realized by adopting at least 2 Hall switches and a plurality of magnets. In another related technology, the judgment of the positive and negative rotation of the motor is realized through a photoelectric transceiving mode (a single transmitting tube and 2 receiving tubes).

However, due to the limitations of some applications, the way of multiple hall switches and multiple magnets or the way of single transmitting tube and dual receiving tubes has the problems of difficult installation and relatively high cost in structure.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

To this end, a first aspect of the invention aims to provide a switch.

It is an object of a second aspect of the present invention to provide a cooking appliance comprising the above switch.

A third aspect of the present invention is directed to a control method.

A fourth aspect of the present invention is directed to a control device.

A fifth aspect of the present invention is directed to a computer-readable storage medium.

To achieve the above object, an aspect of the present invention provides a switch, including: a circuit board; the signal transmitting device and the signal receiving device are correspondingly arranged, and the signal receiving device is connected with the circuit board; the signal shielding device comprises a plurality of shielding pieces which are positioned on the same arc and are sequentially arranged at intervals along the circumferential direction of the arc, and the signal shielding device rotates relative to the signal transmitting device and the signal receiving device so as to enable the shielding pieces to shield or not shield signals between the signal transmitting device and the signal receiving device; wherein, along the circumference of the signal shielding device, the lengths of a plurality of the shielding parts are gradually increased or decreased, and/or the distance between two adjacent shielding parts is gradually increased or decreased.

In the switch provided by the technical scheme of the invention, the shielding part rotates relative to the signal emitting device and the signal receiving device, when the shielding part rotates to a position between the signal emitting device and the signal receiving device, the shielding part prevents the signal receiving device from receiving a signal from the signal emitting device, and a circuit board receives a signal which is 1 and is at a high level; when the gap area between two adjacent shields rotates to the position between the signal transmitting device and the signal receiving device, the shields cannot prevent the signal receiving device from receiving signals from the signal transmitting device, and the receiving signals of the circuit board are 0 and are at low level. Therefore, the level acquired by the circuit board is switched between a high level and a low level in a state where the signal receiving device and the signal transmitting device are not provided with the shielding member.

The lengths of the plurality of shielding pieces are gradually increased or decreased, and/or the distance between two adjacent shielding pieces is gradually increased or decreased, so that the time for the circuit board to acquire the high level state and/or the low level state is unequal, the rotating direction of the switch is obtained according to the change rule of the time in the high level state and/or the low level state, the rotating direction does not need to be judged asynchronously through the change of 2 signals in the related technology, and the judging method is simple and reliable.

In the application, the detection of the rotation direction of the switch is realized through the change of the lengths of the plurality of shielding pieces and/or the distance between two adjacent shielding pieces, so that the number of the signal transmitting devices and the number of the signal receiving devices are not required, in other words, the number of the signal transmitting devices and the number of the signal receiving devices can be one, the signal transmitting devices and the signal receiving devices are convenient to install, and the cost is low.

In addition, the switch provided by the technical scheme of the invention also has the following additional technical characteristics:

in the above technical scheme, the signal shielding device includes an annular shielding device body, and a plurality of the shielding members are arranged in sequence along the circumferential direction of the shielding device body, and the shielding members are located between the signal transmitting device and the signal receiving device.

Cooking utensil includes the cooking utensil body, and the switch includes the rotating part, and the rotating part setting is on the cooking utensil body to rotate for the cooking utensil body. The signal shielding device is arranged on the rotating part and rotates relative to the cooking utensil body along with the rotating part. The circuit board, the signal receiving device and the signal transmitting device are disposed on the cooking appliance body.

The shield sets up on the shielding device body, and along with the rotation of rotating part, the shield can be located between signal emission device and the signal reception device to hinder signal reception device received signal.

In any of the above technical solutions, along the circumferential direction of the signal shielding device, the lengths of the plurality of shielding pieces are respectively K1 and K2 … … Kn, and the distances between two adjacent shielding pieces are respectively L1 and L2 … … Ln; k1, K2 … … Kn is gradually reduced or increased, and L1 is L2 … … is Ln; or L1, L2 … … Ln gradually decreases or increases, K1 ═ K2 … … ═ Kn; alternatively, K1+ L1 ═ K2+ L2 … … ═ Kn + Ln.

K1, K2 … … Kn and/or L1, L2 … … Ln. Specifically, when K1, K2 … … Kn are gradually increased or decreased, L1, L2 … … Ln may be gradually increased or decreased or unchanged. When L1 and L2 … … Ln are gradually increased or decreased, K1 and K2 … … Kn can be gradually increased or decreased or unchanged. Further, K1+ L1 ═ K2+ L2 … … ═ Kn + Ln, that is, the sum of the distances between a shield, the shield, and another shield adjacent thereto is constant along the circumferential direction of the signal shield device.

The plurality of shielding elements are HT1, HT2 … … HTn, Lm, respectively, which is a distance between two adjacent shielding elements HT m and HT (m +1), and Lm is a distance between two adjacent sidewalls of the HTm and HT (m +1), i.e., a length of a gap between the HTm and HT (m + 1).

In any of the above solutions, the maximum value of K1, K2 … … Kn is greater than 1.5 times the minimum value, or the maximum value of L1, L2 … … Ln is greater than 1.5 times the minimum value.

When K1, K2 … … Kn are gradually increased or decreased, in order to increase the time difference between the passage of the first shield and the last shield through the signal receiving device and the signal transmitting device, the maximum value of K1, K2 … … Kn is set to be greater than 1.5 times the minimum value. When L1, L2 … … Ln gradually increase or decrease, in order to increase the time difference between L1 and Ln passing through the signal receiving device and the signal transmitting device, the maximum value of L1, L2 … … Ln is set to be greater than 1.5 times the minimum value.

In any of the above solutions, the minimum value of K1, K2 … … Kn is greater than or equal to 1mm, or the minimum value of L1, L2 … … Ln is greater than or equal to 1 mm.

On one hand, the shield with the shortest length or the time that the minimum distance between two adjacent shields passes through the signal transmitting device and the signal receiving device is increased, the circuit board can be ensured to obtain the high level or the low level when the shortest shield or the minimum distance passes through the signal transmitting device and the signal receiving device, on the other hand, the processing and molding of the signal shielding device are facilitated, and the manufacturing cost of the signal shielding device is reduced.

In any of the above technical solutions, the signal emitting device includes an emitting tube for emitting a light wave, the signal receiving device includes a receiving tube for receiving the light wave, and the shielding member can block the receiving tube from receiving the light wave; or, the signal transmitting device comprises a magnet, and the signal receiving device comprises a hall element, wherein the hall element is used for detecting the change of the magnetic field of the magnet and correspondingly conducting or breaking.

When the shielding part moves to the preset position, the receiving tube is prevented from receiving light emitted by the emitting tube, so that the electric signal generated by the receiving tube changes, and the circuit board acquires the electric signal, thereby acquiring the real-time position of the switch.

Further, the hall element is provided on the circuit board. The magnet emits a secondary field outwards, and the Hall element can react to the magnetic force lines which are strong enough nearby and output high and low level signals which can be used by the circuit board. The hall element can also be replaced by a reed switch.

In any of the above technical solutions, along the circumferential direction of the signal shielding device, lengths of the plurality of shielding elements are respectively K1 and K2 … … Kn, distances between two adjacent shielding elements are respectively L1 and L2 … … Ln, and a photoelectric effective receiving range of the receiving tube is D0, where C is equal to or less than D0, where C is a maximum value of K1 and K2 … … Kn or a maximum value of L1 and L2 … … Ln.

D0 is the maximum distance between the transmitting tube and the receiving tube when the receiving tube can effectively receive the light wave transmitted by the transmitting tube. When K1 and K2 … … Kn are gradually increased or decreased, C is the maximum value of K1 and K2 … … Kn, and when L1 and L2 … … Ln are gradually increased or decreased, C is the maximum value of L1 and L2 … … Ln.

An aspect of the second aspect of the present invention provides a cooking appliance, including: a cooking appliance body; and the switch according to any one of the above technical solutions, wherein the switch is disposed on the cooking appliance body, and the signal shielding device rotates relative to the cooking appliance body.

The cooking appliance provided by the technical scheme of the second aspect of the present invention includes the switch of any one of the technical schemes of the first aspect, so that all the beneficial effects of the switch of any one of the technical schemes of the first aspect are achieved, and details are not repeated herein.

The circuit board, the signal emitting device and the signal receiving device are fixed on the cooking appliance body, and the signal shielding device can be arranged on the cooking appliance body in a relatively rotating mode.

A third aspect of the present invention provides a control method for controlling the switch according to any one of the first aspect, the control method including: the detection circuit board acquires time in a high level state and/or a low level state; and judging the rotation direction of the switch according to the time change in the high level and/or low level state.

In the control method provided by the technical scheme of the third aspect of the invention, the shielding piece rotates relative to the signal emitting device and the signal receiving device, when the shielding piece rotates to a position between the signal emitting device and the signal receiving device, the shielding piece prevents the signal receiving device from receiving the signal from the signal emitting device, and the receiving signal of the circuit board is 1 and is at a high level; when the gap area between two adjacent shields rotates to the position between the signal transmitting device and the signal receiving device, the shields cannot prevent the signal receiving device from receiving signals from the signal transmitting device, and the receiving signals of the circuit board are 0 and are at low level. Therefore, the level acquired by the circuit board is switched between a high level and a low level in a state where the signal receiving device and the signal transmitting device are not provided with the shielding member.

In the above technical solution, the determining the rotation direction of the switch according to the time variation in the high level state and/or the low level state specifically includes: and judging a critical state and a non-critical state, wherein the time change law of the critical state and the non-critical state is opposite to that of the high level state and/or the low level state.

The critical state refers to a process of rotating from Ln to L1, and the non-critical state refers to a process of rotating from L1 to Ln.

Taking the length of the plurality of shielding pieces all equal, for example, L1< L2< L3- - < Ln, during the rotation of the switch, the plurality of shielding pieces pass between the signal emitting device and the signal receiving device, the time of the circuit board in each high level state is equal, and the time in the low level state changes as the distance between different adjacent shielding pieces passes between the signal emitting device and the signal receiving device. If the switch rotates counterclockwise, the distance between two adjacent shields is gradually increased, and when L1 and L2 … … Ln sequentially pass between the signal emitting device and the signal receiving device, the time of low level is t1 and t2 … … tn, and the time t1 and t2 … … tn in the low level state in the non-critical state are gradually increased. If t1 and t2 … … tn are gradually reduced, the switch is judged to rotate clockwise. In the critical state, tn is greater than t1 for counterclockwise rotation and less than t1 for clockwise rotation. For example, L1, judgment of Ln critical state: when tn is not less than 2 × t1 or tn is not more than 2 × t1, the rotation is determined as a critical point (critical state), and when tn is not less than 2 × t1, the rotation is counterclockwise, and when tn is not more than 2 × t1, the rotation is clockwise.

In any technical scheme, K1 and K2 … … Kn are gradually reduced or increased, and L1 is equal to L2 … … is equal to Ln; alternatively, L1, L2 … … Ln gradually decrease or increase, and K1 ═ K2 … … ═ Kn; the determining the rotation direction of the switch according to the time change in the high level and/or low level state specifically includes: acquiring time Wa in a high-level state and time Ta in a low-level state adjacent to the high-level state, wherein a is more than or equal to 1 and less than or equal to n; judging the rotation direction of the switch according to the change of Wa/Ta or Ta/Wa; or, the determining the rotation direction of the switch according to the time variation in the high level and/or low level state, where K1+ L1 is K2+ L2 … … is Kn + Ln, specifically includes: acquiring time Wa in a high-level state and time Ta in a low-level state adjacent to the high-level state, wherein a is more than or equal to 1 and less than or equal to n; and judging the rotation direction of the switch according to the change of Wa/(Wa + Ta) or Ta/(Wa + Ta).

When K1 < K2 … … < Kn, L1 is L2 … … equal to Ln, or K1 is K2 … … is Kn, and L1 is L2 … … equal to Ln, time Wa in the high level state changes, time Ta in the low level state does not change, and the rotation direction of the switch is determined from the change in Wa/Ta or Ta/Wa in order to eliminate the influence of external factors such as the rotation speed of the switch.

When L1< L2 … … < Ln, and K1 is K2 … …, Kn, or L1 > L2 … … > Ln, and K1 is K2 … …, Kn, the time Wa in the high state is unchanged, the time Ta in the low state is changed, and the rotation direction of the switch is determined from the change in Wa/Ta or Ta/Wa in order to eliminate the influence of external factors such as the rotation speed of the switch.

When K1+ L1 is K2+ L2 … … is Kn + Ln, the sum of the times in the adjacent high level state and low level state is equal, the time Wa in the high level state is constant, the time Ta in the low level state is changed, and the rotation direction of the switch is determined from the change of Wa/(Wa + Ta) or Ta/(Wa + Ta) in order to eliminate the influence of external factors such as the rotation speed of the switch.

The technical scheme of the fourth aspect of the invention provides a control device, which comprises a memory and a processor; wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the control method according to any one of the technical solutions of the third aspect.

An aspect of the fifth aspect of the present invention provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the steps of the control method according to any one of the aspects of the third aspect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a circuit diagram of rotation coding in the related art.

Fig. 2 is a schematic structural diagram of a signal shielding device according to a first embodiment of the present invention;

fig. 3 is a schematic view of a matching structure of the signal shielding device, the transmitting tube and the receiving tube according to the first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a transmitting tube and a receiving tube according to a first embodiment of the present invention;

FIG. 5 is a schematic diagram of a switch according to a first embodiment of the present invention;

FIG. 6 is a waveform illustrating the rotation of the switch according to the first embodiment of the present invention, wherein (a) the switch is rotated counterclockwise and (b) the switch is rotated clockwise;

FIG. 7 is a schematic diagram of a switch according to a second embodiment of the present invention;

fig. 8 is a flowchart illustrating a control method according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 2 to 7 is:

the signal shielding device comprises a signal shielding device 1, a shielding device body 11, a shielding device 12, a transmitting tube 2, a receiving tube 3, a circuit board 4, a magnet 5 and a Hall element 6.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

A switch, a cooking appliance, a control method, a control apparatus, and a computer-readable storage medium according to some embodiments of the present invention are described below with reference to the accompanying drawings.

As shown in fig. 2 and 3, a switch according to some embodiments of the present invention includes: a circuit board 4; the signal transmitting device and the signal receiving device are correspondingly arranged, and the signal receiving device is connected with the circuit board 4; the signal shielding device 1 comprises a plurality of shielding pieces 12 which are positioned on the same circular arc and are sequentially arranged at intervals along the circumferential direction of the circular arc, the lengths of the plurality of shielding pieces 12 are gradually increased or decreased along the circumferential direction of the signal shielding device 1, and/or the distance between two adjacent shielding pieces 12 is gradually increased or decreased, and the signal shielding device 1 rotates relative to the signal transmitting device and the signal receiving device, so that the shielding pieces 12 shield or shield signals between the signal transmitting device and the signal receiving device.

In the switch provided by the above technical scheme of the invention, the shielding part 12 rotates relative to the signal emitting device and the signal receiving device, when the shielding part 12 rotates to a position between the signal emitting device and the signal receiving device, the shielding part 12 obstructs the signal receiving device from receiving the signal from the signal emitting device, and the receiving signal of the circuit board 4 is 1 and is at a high level; when the gap area between two adjacent shields 12 is rotated to the position between the signal transmitting device and the signal receiving device, the shields 12 do not prevent the signal receiving device from receiving the signal from the signal transmitting device, and the signal received by the circuit board 4 is 0 and at a low level. Therefore, the level acquired by the circuit board 4 is switched between a high level and a low level in the state where the shield 12 is not present between the signal receiving device and the signal transmitting device.

The lengths of the plurality of shielding pieces 12 are gradually increased or decreased, and/or the distance between two adjacent shielding pieces 12 is gradually increased or decreased, so that the time for the circuit board 4 to acquire the high level state and/or the low level state is unequal, the rotation direction of the switch is obtained according to the change rule of the time in the high level state and/or the low level state, the rotation direction does not need to be judged asynchronously through the change of 2 signals in the related technology, and the judging method is simple and reliable.

In the application, the detection of the rotation direction of the switch is realized through the change of the lengths of the plurality of shielding pieces 12 and/or the distance between two adjacent shielding pieces 12, so that the number of the signal transmitting devices and the number of the signal receiving devices are not required, in other words, the number of the signal transmitting devices and the number of the signal receiving devices can be one, the installation of the signal transmitting devices and the signal receiving devices is convenient, and the cost is low. As in fig. 5, the number of circuit boards 4 is one, designated IC1, the number of emitter tubes 2 is one, designated IR1, and the number of receiver tubes 3 is one, designated PT 1. In fig. 7, the number of magnets 5 is one, and is denoted by CT1, and the number of hall elements 6 is one, and is denoted by H1.

The first embodiment is as follows:

in some embodiments, as shown in fig. 2 to 5, the signal emitting device comprises an emitting tube 2 for emitting light waves, the signal receiving device comprises a receiving tube 3 for receiving light waves, and the shielding member 12 can block the receiving tube 3 from receiving light waves.

When the shielding part 12 moves to the preset position, the receiving tube 3 is prevented from receiving the light emitted by the transmitting tube 2, so that the electric signal generated by the receiving tube 3 changes, and the circuit board 4 acquires the electric signal, thereby acquiring the real-time position of the switch.

The lengths of the plurality of shields 12 are K1 and K2 … … Kn respectively along the circumferential direction of the signal shielding device 1, and the distances between two adjacent shields 12 are L1 and L2 … … Ln respectively; l1, L2 … … Ln gradually increases, K1 ═ K2 … … ═ Kn.

K1, K2 … … Kn is gradually decreased or increased, and L1-L2 … … -Ln. Alternatively, L1 and L2 … … Ln are gradually decreased, and K1 is K2 … … is Kn. Or K1+ L1-K2 + L2 … … -Kn + Ln, K1, K2 … … Kn are gradually decreased or increased and/or L1, L2 … … Ln are gradually increased or decreased. The gradual increase or decrease may be an increase or decrease in the arithmetic progression, or may be a tendency of increasing or decreasing as a whole, although not arithmetic progression.

The signal shielding device 1 includes an annular shielding device body 11, a plurality of shielding members 12 are sequentially arranged along a circumferential direction of the shielding device body 11, and the shielding members 12 are located between the signal transmitting device and the signal receiving device.

Cooking utensil includes the cooking utensil body, and the switch includes the rotating part, and the rotating part setting is on the cooking utensil body to rotate for the cooking utensil body. The signal shielding device 1 is provided at the rotating portion and rotates with the rotating portion relative to the cooking appliance body. The circuit board 4, the signal receiving device, and the signal transmitting device are provided on the cooking appliance body.

The shield 12 is provided on the shield device body 11, and the shield 12 can be positioned between the signal emitting device and the signal receiving device with the rotation of the rotating portion to block the signal receiving device from receiving a signal.

The plurality of shielding members 12 are HT1, HT2 … … HTn, Lm is a distance between two adjacent shielding members 12HTm, HT (m +1), and Lm is a distance between two adjacent sidewalls of the HTm and HT (m +1), i.e., a length of a gap between the HTm and HT (m + 1).

In some embodiments, the maximum of K1, K2 … … Kn is greater than 1.5 times the minimum, or alternatively, the maximum of L1, L2 … … Ln is greater than 1.5 times the minimum.

When K1, K2 … … Kn are gradually increased or decreased, in order to increase the time difference between the passage of the first shield 12 and the last shield 12 through the signal receiving device and the signal transmitting device, the maximum value of K1, K2 … … Kn is set to be greater than 1.5 times the minimum value. When L1, L2 … … Ln gradually increase or decrease, in order to increase the time difference between L1 and Ln passing through the signal receiving device and the signal transmitting device, the maximum value of L1, L2 … … Ln is set to be greater than 1.5 times the minimum value.

In some embodiments, the minimum of K1, K2 … … Kn is greater than or equal to 1mm, or the minimum of L1, L2 … … Ln is greater than or equal to 1 mm.

On one hand, the shortest shielding piece 12 or the time that the minimum distance between two adjacent shielding pieces 12 passes through the signal transmitting device and the signal receiving device is increased, the circuit board 4 can obtain the high level or the low level when the shortest shielding piece 12 or the minimum distance passes through the signal transmitting device and the signal receiving device, on the other hand, the processing and forming of the signal shielding device 1 are facilitated, and the manufacturing cost of the signal shielding device 1 is reduced.

In some embodiments, in the circumferential direction of the signal shielding device 1, the lengths of the plurality of shielding elements 12 are K1 and K2 … … Kn, the distances between two adjacent shielding elements 12 are L1 and L2 … … Ln, respectively, the photoelectrically effective receiving range of the receiving tube 3 is D0, and then C < ═ D0, where C is the maximum value of K1, K2 … … Kn or the maximum value of L1 and L2 … … Ln.

D0 is the maximum distance between the transmitting tube 2 and the receiving tube when the receiving tube 3 can effectively receive the light wave transmitted by the transmitting tube 2. When K1 and K2 … … Kn are gradually increased or decreased, C is the maximum value of K1 and K2 … … Kn, and when L1 and L2 … … Ln are gradually increased or decreased, C is the maximum value of L1 and L2 … … Ln.

Example two:

the difference from the first embodiment is that the signal emitting device comprises a magnet 5, the signal receiving device comprises a hall element 6, and the hall element 6 is used for detecting the change of the magnetic field 5 of the magnet and correspondingly turning on or off. As shown in fig. 7, the control circuit of the second embodiment includes a resistor R3, a hall element H1, and a magnet CT 1.

Further, the hall element 6 is provided on the circuit board 4. The magnet 5 emits outward from the sub-vertical, and the hall element 6 can react to the magnetic force lines in the vicinity thereof strong enough to output high and low level signals that can be received by the circuit board 4. The hall element 6 can also be replaced by a reed switch.

An aspect of the second aspect of the present invention provides a cooking appliance, including: a cooking appliance body; and a switch as in any one of the first aspect's technical solutions, the switch being provided on the cooking appliance body, and the signal shielding device 1 being rotated with respect to the cooking appliance body.

The cooking utensil can be electromagnetism stove, electric rice cooker, pressure cooker or other cooking equipment that need set up rotary switch, can understand that the switch in this application can also be applied to the field that needs set up rotary switch except that cooking utensil.

The circuit board 4, the signal emitting device and the signal receiving device are fixed on the cooking appliance body, and the signal shielding device 1 is arranged on the cooking appliance body in a relatively rotatable mode.

As shown in fig. 8, a third aspect of the present invention provides a control method for controlling a switch according to any one of the first aspect, the control method comprising:

step S100, detecting the time of the circuit board 4 in a high level and/or low level state;

step S200, judging the rotation direction of the switch according to the time change in the high level and/or low level state.

In step S100, in the process of rotating the switch, if there is a change in the time in the high level state, the time in the high level state is detected; if the time in the low level state changes, detecting the time in the low level state; if there is a change in both the time in the high state and the time in the low state, the time in the high state and/or the low state can be detected.

In the control method provided by the technical scheme of the third aspect of the invention, the shielding piece 12 rotates relative to the signal emitting device and the signal receiving device, when the shielding piece 12 rotates to a position between the signal emitting device and the signal receiving device, the shielding piece 12 prevents the signal receiving device from receiving the signal from the signal emitting device, and the receiving signal of the circuit board 4 is 1 and is at a high level; when the gap area between two adjacent shields 12 is rotated to the position between the signal transmitting device and the signal receiving device, the shields 12 do not prevent the signal receiving device from receiving the signal from the signal transmitting device, and the signal received by the circuit board 4 is 0 and at a low level. Therefore, the level acquired by the circuit board 4 is switched between a high level and a low level in the state where the shield 12 is not present between the signal receiving device and the signal transmitting device.

In some embodiments, determining the rotation direction of the switch according to the time variation in the high level state and/or the low level state specifically includes: and judging a critical state and a non-critical state, wherein the time change law of the critical state and the non-critical state is opposite to that of the high level state and/or the low level state.

Taking the length of the plurality of shields 12 as equal, for example, L1< L2< L3- - < Ln, during the rotation of the switch, the plurality of shields 12 pass between the signal emitting device and the signal receiving device, the time of each high state acquired by the circuit board 4 is equal, and the time of the low state changes as the distance between different adjacent shields 12 passes between the signal emitting device and the signal receiving device. If the switch rotates counterclockwise, the distance between two adjacent shields 12 gradually increases, and when L1 and L2 … … Ln sequentially pass between the signal emitting device and the signal receiving device, the time of the low level is t1 and t2 … … tn, and the time t1 and t2 … … tn in the low level state in the non-critical state gradually increases. If t1 and t2 … … tn are gradually reduced, the switch is judged to rotate clockwise. In the critical state, tn is greater than t1 for counterclockwise rotation and less than t1 for clockwise rotation. For example, L1, judgment of Ln critical state: when tn is not less than 2 × t1 or tn is not more than 2 × t1, the rotation is determined as a critical point (critical state), and when tn is not less than 2 × t1, the rotation is counterclockwise, and when tn is not more than 2 × t1, the rotation is clockwise.

In some embodiments, K1 < K2 … … < Kn or K1 > K2 … … > Kn, and L1-L2 … … -Ln; or L1< L2 … … < Ln or L1 > L2 … … > Ln, and K1-K2 … … -Kn; according to the time change under the high level and/or the low level state, judge the direction of rotation of switch, specifically include: acquiring time Wa in a high-level state and time Ta in a low-level state adjacent to the high-level state, wherein a is more than or equal to 1 and less than or equal to n; and judging the rotation direction of the switch according to the change of the Wa/Ta or Ta/Wa.

In some embodiments, the determining the rotation direction of the switch according to the time variation in the high level and/or low level state by K1+ L1 ═ K2+ L2 … … ═ Kn + Ln includes: acquiring time Wa in a high-level state and time Ta in a low-level state adjacent to the high-level state, wherein a is more than or equal to 1 and less than or equal to n; and judging the rotation direction of the switch according to the change of Wa/(Wa + Ta) or Ta/(Wa + Ta).

In a specific embodiment, there is a transceiver module above the signal shielding device, and the transceiver module includes a photoemissive tube IR1 and a receiving tube PT 1. The signal shielding device is regularly distributed with a plurality of shielding pieces (HT1, HT 2-HTn), the distance between two adjacent shielding pieces is L1 and L2-Ln respectively, wherein L1< L2< L3 < Ln. The shield lengths are K1, K2, K3-Kn, respectively. Where K1-K2-K3-Kn. When rotating, HT1, HT 2-HTn pass through between IR1 and PT 1. The shielding member is used for preventing the receiving tube from receiving signals (the PORT1 signal is at high level at the moment), when no shielding member exists between the IR1 and the PT1, the PT1 receives signals normally, and the PORT1 signal is at low level. The circuit board (chip IC1) receives a signal of 1 at high level and a chip receives a signal of 0 at low level; further, Ln > -1.5 XL 1.

As shown in FIG. 5, the control circuit comprises a photoelectric emission tube IR1, a receiving tube PT1, resistors R1 and R2, and a plurality of shielding pieces sequentially pass between the emission tube IR1 and the receiving tube PT1 to interfere signal reception. The signal shielding device is in a counter-clockwise rotated state in fig. 5.

As in fig. 6(a), when the switch is rotated counterclockwise, t1< t2< t3- - < tn at the same speed. Wherein t1 and t2 … … tn are the time between the L1 and the L2 … … Ln passing through the transmitting tube and the receiving tube respectively. As shown in FIG. 6(b), when the switch is rotated clockwise, tn > tn-1 > - - > t1 at the same speed.

For the switches shown in fig. 2 to 5, there may be the following two control implementation methods.

The method comprises the following steps:

1) when the rotation is carried out, the main control chip sequentially obtains the time Tn, Tn +1 and Tn +2- - -in a low level state.

2) L1, judgment of Ln critical state: when Tn > is 2 × Tn +1 or Tn < 2 × Tn +1, it is determined as a critical point.

The direction is anticlockwise when Tn > 2 Tn +, the direction is clockwise when Tn < (2 Tn +),

3) l1, judging the non-critical state of Ln, wherein Tn < Tn +1< Tn +2 is in the counter-clockwise direction, and Tn > Tn +1> Tn +2 is in the clockwise direction.

The second method,

1) During rotation, the main control chip sequentially obtains the time Tn, Tn +1 and Tn + 2-in a low level state, and simultaneously obtains the high level time Wn, Wn +1 and W + 2-in a high level state;

2) k1 is required to be K2 — Kn (fixed shield length), and a single ratio Yn, Yn +1, Yn +2, is obtained, where Yn is Tn/Wn, so as to eliminate the influence of external factors such as the rotational speed of the switch.

3) And acquiring the rotating direction according to the acquired Yn, Yn +1, Yn + 2-according to the steps 2) and 3) in the first method.

Therefore, the input of the coding switch is realized through an optoelectronic receiving and transmitting mode, the receiving of the receiving tube is blocked from different directions through the shielding pieces HT1, HT2 and HTn, the signal time change is different, and the detection of the entering direction of the shielding pieces is realized.

The technical scheme of the fourth aspect of the invention provides a control device, which comprises a memory and a processor; wherein the processor runs the program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the control method according to any one of the technical solutions of the third aspect.

An embodiment of a fifth aspect of the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the control method according to any one of the preceding embodiments.

Further, it will be understood that any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable storage medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In summary, the switch provided in the embodiments of the present invention obtains the movement direction of the switch through different lengths of the input signals (high level and low level), so as to determine the switch action direction.

In the description of the present invention, the term "plurality" means two or more unless explicitly specified or limited otherwise; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present specification, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A switch, comprising:

a circuit board;

the signal transmitting device and the signal receiving device are correspondingly arranged, and the signal receiving device is connected with the circuit board;

the signal shielding device comprises a plurality of shielding pieces which are positioned on the same arc and are sequentially arranged at intervals along the circumferential direction of the arc, and the signal shielding device rotates relative to the signal transmitting device and the signal receiving device so as to enable the shielding pieces to shield or not shield signals between the signal transmitting device and the signal receiving device;

the length of the plurality of shielding pieces is gradually increased or decreased along the circumferential direction of the signal shielding device, and/or the distance between two adjacent shielding pieces is gradually increased or decreased.

2. The switch of claim 1,

the signal shielding device comprises an annular shielding device body, the shielding pieces are arranged along the circumferential direction of the shielding device body in sequence, and the shielding pieces are located between the signal transmitting device and the signal receiving device.

3. Switch according to claim 1 or 2,

the lengths of the plurality of shielding pieces are respectively K1 and K2 … … Kn along the circumferential direction of the signal shielding device, and the distances between every two adjacent shielding pieces are respectively L1 and L2 … … Ln;

k1, K2 … … Kn is gradually reduced or increased, and L1 is L2 … … is Ln; or L1, L2 … … Ln gradually decreases or increases, K1 ═ K2 … … ═ Kn; alternatively, K1+ L1 ═ K2+ L2 … … ═ Kn + Ln.

4. Switch according to claim 1 or 2,

the maximum of K1, K2 … … Kn is greater than 1.5 times the minimum, or alternatively, the maximum of L1, L2 … … Ln is greater than 1.5 times the minimum.

5. Switch according to claim 1 or 2,

the minimum value of K1, K2 … … Kn is greater than or equal to 1mm, or the minimum value of L1, L2 … … Ln is greater than or equal to 1 mm.

6. Switch according to claim 1 or 2,

the signal emitting device comprises an emitting tube for emitting light waves, the signal receiving device comprises a receiving tube for receiving the light waves, and the shielding piece can prevent the receiving tube from receiving the light waves; or, the signal transmitting device comprises a magnet, and the signal receiving device comprises a hall element, wherein the hall element is used for detecting the change of the magnetic field of the magnet and correspondingly conducting or breaking.

7. The switch of claim 6,

the lengths of the plurality of shielding pieces are respectively K1 and K2 … … Kn along the circumferential direction of the signal shielding device, the distance between every two adjacent shielding pieces is respectively L1 and L2 … … Ln, the photoelectric effective receiving range of the receiving tube is D0, C is less than or equal to D0, and C is the maximum value of K1 and K2 … … Kn or the maximum value of L1 and L2 … … Ln.

8. A cooking appliance, comprising:

a cooking appliance body; and

the switch of any one of claims 1 to 7, wherein the switch is disposed on the cooking appliance body and the signal shielding device rotates relative to the cooking appliance body.

9. A control method for a switch according to any one of claims 1 to 7, the control method comprising:

the detection circuit board acquires time in a high level state and/or a low level state;

and judging the rotation direction of the switch according to the time change in the high level and/or low level state.

10. The control method according to claim 9,

the determining the rotation direction of the switch according to the time change in the high level and/or low level state specifically includes:

and judging a critical state and a non-critical state, wherein the time change law of the critical state and the non-critical state is opposite to that of the high level state and/or the low level state.

11. The control method according to claim 9 or 10,

k1, K2 … … Kn is gradually decreased or increased, and L1-L2 … … -Ln; alternatively, L1, L2 … … Ln gradually decrease or increase, and K1 ═ K2 … … ═ Kn; the determining the rotation direction of the switch according to the time change in the high level and/or low level state specifically includes:

acquiring time Wa in a high-level state and time Ta in a low-level state adjacent to the high-level state, wherein a is more than or equal to 1 and less than or equal to n;

judging the rotation direction of the switch according to the change of Wa/Ta or Ta/Wa; alternatively, the first and second electrodes may be,

k1+ L1 is K2+ L2 … … is Kn + Ln, and the determining the rotation direction of the switch according to the time change in the high level and/or low level state specifically includes:

and judging the rotation direction of the switch according to the change of Wa/(Wa + Ta) or Ta/(Wa + Ta).

12. A control device, comprising a memory, a processor; wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for implementing the control method according to any one of claims 9 to 11.

13. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program realizing the steps of the control method according to any one of claims 9-11 when executed by a processor.