CN112013430B

CN112013430B - Switch, cooking appliance, control method, control device, and computer-readable storage medium

Info

Publication number: CN112013430B
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: 2023-05-26
Anticipated expiration: 2039-05-28
Also published as: CN112013430A

Abstract

The invention provides a switch, a cooking appliance, a control method, a control device and a computer readable storage medium. The switch comprises: 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 circular arc and are sequentially arranged at intervals along the circumferential direction of the circular 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 the lengths of the plurality of shields are gradually increased or decreased, and/or the distances between adjacent two shields are gradually increased or decreased along the circumferential direction of the signal shielding device. The switch provided by the invention judges the rotation direction of the switch according to the time change in the high-low level state, 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 device, and a computer-readable storage medium.

Background

Existing rotary encoders determine the direction of rotation by at least 2 signal changes being out of sync. As in fig. 1J 1, J2 are turned on during rotation, respectively. The rotation direction is different, and the conduction sequence of J1 and J2 is different.

In a related art, at least 2 hall switches and a plurality of magnets are adopted to realize the judgment of the rotation direction. In another related art, the judgment of the forward and reverse rotation of the motor is realized by a photoelectric receiving and transmitting mode (a single transmitting tube and 2 receiving tubes).

However, the manner of multiple hall switches and multiple magnets or the manner of a single transmitting tube and dual receiving tubes is limited by some applications, and has the problems of difficult installation in terms of structure and relatively high cost.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

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

A second aspect of the present invention aims to provide a cooking appliance comprising the 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.

In order to achieve the above object, according to one aspect of the present invention, there is provided 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 circular arc and are sequentially arranged at intervals along the circumferential direction of the circular arc, and the signal shielding device rotates relative to the signal transmitting device and the signal receiving device so that the shielding pieces can shield or not shield signals between the signal transmitting device and the signal receiving device; wherein the lengths of a plurality of the shields are gradually increased or decreased along the circumferential direction of the signal shielding device, and/or the distances between two adjacent shields are gradually increased or decreased.

According to the switch provided by the technical scheme, the shielding piece rotates relative to the signal transmitting device and the signal receiving device, when the shielding piece rotates between the signal transmitting device and the signal receiving device, the shielding piece prevents the signal receiving device from receiving a signal from the signal transmitting device, and the circuit board receives a signal of 1 and is in a high level; when the gap area between two adjacent shielding pieces rotates to a position between the signal transmitting device and the signal receiving device, the shielding pieces can not prevent the signal receiving device from receiving signals from the signal transmitting device, and the circuit board receives signals to be 0 and low level. Therefore, the level acquired by the circuit board is shifted between the high level and the low level in the state where the shield is present or absent between the signal receiving device and the signal transmitting device.

The lengths of the shielding pieces are gradually increased or reduced, and/or the distance between two adjacent shielding pieces is gradually increased or reduced, so that the time for the circuit board to acquire the high level and/or the low level state is unequal, the rotation direction of the switch is known according to the time change rule of the high level and/or the low level state, the rotation direction is not needed to be judged in an asynchronous manner through the change of 2 signals in the related art, and the judging method is simple and reliable.

In the method, the detection of the rotation direction of the switch is realized through the length of a plurality of shielding pieces and/or the change of 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 installation of the signal transmitting devices and the signal receiving devices is convenient, and the cost is low.

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

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

The cooking utensil includes the cooking utensil body, and the switch includes rotary part, and rotary part sets up on the cooking utensil body to rotate relative to the cooking utensil body. The signal shielding device is arranged on the rotating part and rotates along with the rotating part relative to the cooking utensil body. The circuit board, the signal receiving device and the signal transmitting device are arranged on the cooking utensil body.

The shielding member is disposed on the shielding device body and is capable of being positioned between the signal transmitting device and the signal receiving device along with the rotation of the rotating portion so as to prevent the signal receiving device from receiving signals.

In any of the above technical solutions, along the circumferential direction of the signal shielding device, lengths of a plurality of shielding pieces are respectively K1, K2 … … Kn, and spaces between two adjacent shielding pieces are respectively L1, L2 … … Ln; k1 K2 … … Kn gradually decreases or increases, l1=l … … =ln; alternatively, L1, L2 … … Ln gradually decreases or increases, k1=k … … =kn; alternatively, k1+l1=k2+l … … =kn+ln.

K1 K2 … … Kn is gradually decreased or increased, and/or L1, L2 … … Ln is gradually decreased or increased. Specifically, when K1, K2 … … Kn is gradually increased or decreased, L1, L2 … … Ln may be gradually increased or decreased or unchanged. When L1, L2 … … Ln is gradually increased or decreased, K1, K2 … … Kn may be gradually increased or decreased or unchanged. Further, k1+l1=k2+l … … =kn+ln, i.e., the sum of the spacing between one shield, that shield and its adjacent other shield is constant along the circumferential direction of the signal shield.

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

In any of the above embodiments, 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.

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 when K1, K2 … … Kn is gradually increased or decreased, the maximum value of K1, K2 … … Kn is set to be greater than 1.5 times the minimum value. When L1, L2 … … Ln gradually increases or decreases, in order to increase the time difference between the passage of L1 and Ln between the signal receiving device and the signal transmitting device, the maximum value in L1, L2 … … Ln is set to be greater than 1.5 times the minimum value.

In any of the above embodiments, 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 1mm.

On one hand, the time that the minimum distance between the shielding piece with the shortest length or two adjacent shielding pieces passes through the signal transmitting device and the signal receiving device is increased, the circuit board is guaranteed to be capable of acquiring the high level or the low level when the minimum distance between the shielding piece with the shortest length or the minimum distance passes through the signal transmitting device and the signal receiving device, on the other hand, the processing and the forming of the signal shielding device are facilitated, and the manufacturing cost of the signal shielding device is reduced.

In any of the above solutions, the signal transmitting device includes a transmitting tube for transmitting a light wave, the signal receiving device includes a receiving tube for receiving the light wave, and the shielding member can prevent the receiving tube from receiving the light wave; alternatively, 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 magnetic field change of the magnet and correspondingly conducting or disconnecting.

When the shielding piece moves to a preset position, the receiving tube is blocked from receiving light rays emitted by the emitting tube, so that an electric signal generated by the receiving tube is caused to change, and the circuit board acquires the electric signal, so that the real-time position of the switch is acquired.

Further, the hall element is provided on the circuit board. The magnet emits outwards from the secondary position, and the Hall element can react to magnetic force lines which are strong enough nearby the Hall element and output high-low level signals which can be used as a quilt by the circuit board. The hall element may 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 a plurality of shielding pieces are respectively K1, K2 … … Kn, distances between two adjacent shielding pieces are respectively L1, L2 … … Ln, and a photoelectric effective receiving range of the receiving tube is D0, then C is less than or equal to D0, where C is a maximum value in K1, K2 … … Kn or a maximum value in L1, L2 … … Ln.

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

The technical scheme of the second aspect of the invention provides a cooking appliance, which comprises: a cooking appliance body; and a switch as claimed in any one of the first aspect, the switch being provided on the cooking appliance body, and the signal shielding device being rotated with respect to the cooking appliance body.

The cooking appliance provided by the technical scheme of the second aspect of the present invention includes the switch according to any one of the technical schemes of the first aspect, so that the cooking appliance has all the advantages of any one of the switches according to the technical schemes of the first aspect, and is not described herein.

The circuit board, the signal transmitting device and the signal receiving device are fixed on the cooking utensil body, and the signal shielding device can be arranged on the cooking utensil body in a relatively rotating manner.

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

According to the control method provided by the technical scheme of the third aspect of the invention, the shielding piece rotates relative to the signal transmitting device and the signal receiving device, when the shielding piece rotates between the signal transmitting device and the signal receiving device, the shielding piece prevents the signal receiving device from receiving a signal from the signal transmitting device, and the circuit board receives a signal of 1 and is in a high level; when the gap area between two adjacent shielding pieces rotates to a position between the signal transmitting device and the signal receiving device, the shielding pieces can not prevent the signal receiving device from receiving signals from the signal transmitting device, and the circuit board receives signals to be 0 and low level. Therefore, the level acquired by the circuit board is shifted between the high level and the low level in the state where the shield is present or absent between the signal receiving device and the signal transmitting device.

In the above technical solution, 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 change rules of time in the critical state and the non-critical state and the high level and/or low level state are opposite.

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

Taking the length of the shielding pieces being equal, and taking L1< L2< L3- < Ln as an example, in the process of rotation of the switch, the shielding pieces pass through the space between the signal transmitting device and the signal receiving device, the time of each high level state acquired by the circuit board is equal, and the time of the low level state changes along with the space between different adjacent shielding pieces passing through the space between the signal transmitting device and the signal receiving device. If the switch rotates anticlockwise, the distance between two adjacent shielding pieces is gradually increased, and when the L1, L2 … … Ln sequentially passes through the space between the signal transmitting device and the signal receiving device, the time of the low level is sequentially t1, t2 … … tn, and then the time t1, t2 … … tn in the low level state in the non-critical state is gradually increased. If t1, t2 … … tn decreases gradually, the judgment switch rotates clockwise. In the critical state, tn is greater than t1 if rotated counterclockwise and less than t1 if rotated clockwise. For example, judgment of L1, ln critical state: when tn is not less than 2×t1 or tn is not more than 2×t1, the critical point (critical state) is judged, 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 of the above embodiments, K1, K2 … … Kn is gradually decreased or increased, and l1=l … … =ln; alternatively, L1, L2 … … Ln gradually decreases or increases, and k1=k … … =kn; the judging the rotation direction of the switch according to the time change in the high level and/or low level state specifically comprises the following steps: 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 k1+l1=k2+l … … =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: 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; the rotation direction of the switch is judged according to the change of Wa/(Wa+Ta) or Ta/(Wa+Ta).

When K1 < K2 … … < Kn, l1=l2 … … =ln, or when K1 > K2 … … > Kn, l1=l2 … … =ln, the time Wa in the high-level state changes, the 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, k1=k2 … … =kn, or when L1 > L2 … … > Ln, k1=k2 … … =kn, the time Wa in the high-level state is unchanged, and the time Ta in the low-level state is changed, and in order to eliminate the influence of external factors such as the rotation speed of the switch, the rotation direction of the switch is determined from the change in Wa/Ta or Ta/Wa.

When k1+l1=k2+l … … =kn+ln, the sum of the times in the adjacent high-level and low-level states is equal, the time Wa in the high-level state is unchanged, the time Ta in the low-level state is changed, and the rotation direction of the switch is determined from the change in 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, for implementing the control method according to any one of the technical solutions of the third aspect.

A fifth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method according to any one of the third aspect.

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

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a circuit diagram of rotary encoding in the related art.

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

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

FIG. 4 is a schematic view of a structure of a transmitting tube and a receiving tube according to an embodiment of the present invention;

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

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

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

fig. 8 is a flow chart of a control method according to an embodiment of the present invention.

The correspondence between the reference numerals and the component names in fig. 2 to 7 is:

1 signal shielding device, 11 shielding device body, 12 shielding device, 2 transmitting tube, 3 receiving tube, 4 circuit board, 5 magnet, 6 hall element.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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 described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

A switch, a cooking appliance, a control method, a control device, 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 not shield signals between the signal transmitting device and the signal receiving device.

According to the switch provided by the technical scheme, the shielding piece 12 rotates relative to the signal transmitting device and the signal receiving device, when the shielding piece 12 rotates between the signal transmitting device and the signal receiving device, the shielding piece 12 prevents the signal receiving device from receiving a signal from the signal transmitting device, and the circuit board 4 receives a signal 1 and is in a high level; when the gap region between two adjacent shields 12 rotates to between the signal transmitting device and the signal receiving device, the shields 12 do not obstruct the signal receiving device from receiving the signal from the signal transmitting device, and the circuit board 4 receives the signal of 0 at a low level. Therefore, the level acquired by the circuit board 4 is shifted between the high level and the low level in the state where the shield 12 is present or absent 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 distances between two adjacent shielding pieces 12 are gradually increased or decreased, so that the time for the circuit board 4 to acquire the high level and/or the low level state is unequal, the rotation direction of the switch is known according to the time change rule of the high level and/or the low level state, the rotation direction is not needed to be judged through the change of 2 signals in an asynchronous manner like the prior art, and the judging method is simple and reliable.

In this application, through the change of the length of a plurality of shields 12 and/or the distance between two adjacent shields 12, realize the detection to the switch rotation direction, therefore there is not the requirement to the quantity of signal transmitting device and signal receiving device, in other words the quantity of signal transmitting device and signal receiving device can be one, makes things convenient for signal transmitting device and signal receiving device's installation, and with low costs. As in fig. 5, the number of circuit boards 4 is one, denoted IC1, the number of transmitting tubes 2 is one, denoted IR1, the number of receiving tubes 3 is one, denoted PT1. In fig. 7, the number of magnets 5 is one, denoted by CT1, and the number of hall elements 6 is one, denoted by H1.

Embodiment one:

in some embodiments, as shown in fig. 2 to 5, the signal transmitting means comprises a transmitting tube 2 for transmitting light waves, the signal receiving means comprises a receiving tube 3 for receiving light waves, and the shield 12 is capable of blocking the receiving tube 3 from receiving light waves.

When the shield 12 moves to the preset position, the receiving tube 3 is blocked from receiving the light emitted by the emitting tube 2, so that the electric signal generated by the receiving tube 3 is caused to change, and the circuit board 4 acquires the electric signal, so that the real-time position of the switch is acquired.

Along the circumferential direction of the signal shielding device 1, the lengths of the shielding pieces 12 are respectively K1, K2 … … Kn, and the distances between two adjacent shielding pieces 12 are respectively L1, L2 … … Ln; l1, L2 … … Ln gradually increases, k1=k … … =kn.

It may also be that K1, K2 … … Kn gradually decreases or increases, l1=l … … =ln. Alternatively, L1, L2 … … Ln gradually decreases, k1=k2 … … =kn. Or k1+l1=k2+l … … =kn+ln, K1, K2 … … Kn gradually decreases or increases and/or L1, L2 … … Ln gradually increases or decreases. The gradual increase or decrease may be in an arithmetic progression or may be in a non-arithmetic progression, but is generally in an increasing or decreasing trend.

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

The cooking utensil includes the cooking utensil body, and the switch includes rotary part, and rotary part sets up on the cooking utensil body to rotate relative to the cooking utensil body. The signal shielding device 1 is provided at the rotating portion and rotates with the rotating portion with respect 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 as the rotating portion rotates, the shield 12 can be located between the signal transmitting device and the signal receiving device to block the signal receiving device from receiving a signal.

The plurality of shielding members 12 are HT1, HT2 … … HTn, lm are the distances between two adjacent shielding members 12HTm, HT (m+1), and Lm refers to the distances between two adjacent sidewalls of HTm and HT (m+1), that is, the lengths of the gaps between HTm and HT (m+1).

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

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 when K1, K2 … … Kn is gradually increased or decreased, the maximum value of K1, K2 … … Kn is set to be greater than 1.5 times the minimum value. When L1, L2 … … Ln gradually increases or decreases, in order to increase the time difference between the passage of L1 and Ln between the signal receiving device and the signal transmitting device, the maximum value in 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 1mm.

On one hand, the time that the shortest shielding piece 12 or 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 is ensured to 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, along the circumferential direction of the signal shielding device 1, the lengths of the plurality of shielding pieces 12 are K1, K2 … … Kn, the pitches between two adjacent shielding pieces 12 are L1, L2 … … Ln, and the photoelectrically effective receiving range of the receiving tube 3 is D0, then C < =d0, where C is the maximum value of K1, K2 … … Kn or the maximum value of L1, 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. C is the maximum of K1, K2 … … Kn when K1, K2 … … Kn is gradually increased or decreased, and C is the maximum of L1, L2 … … Ln when L1, L2 … … Ln is gradually increased or decreased.

Embodiment two:

the difference from the first embodiment is that the signal emitting device includes a magnet 5, and the signal receiving device includes a hall element 6, and the hall element 6 is used to detect the change of the magnetic field 5 of the magnet and turn on or off accordingly. As shown in fig. 7, the control circuit of the second embodiment includes a resistor R3, a hall element H1, and a magnet CT1.

Further, the hall element 6 is provided on the circuit board 4. The magnet 5 emits outward from the secondary position, and the hall element 6 reacts to magnetic lines of force strong enough in the vicinity thereof and outputs a high-low level signal that can be received by the circuit board 4. The hall element 6 may also be replaced by a reed switch.

The technical scheme of the second aspect of the invention provides a cooking appliance, which comprises: a cooking appliance body; and a switch according to any one of the aspects of the first aspect, 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 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 the cooking appliance has all the advantages of the switch of any one of the technical schemes of the first aspect, and is not described herein.

The cooking utensil can be an induction cooker, an electric cooker, a pressure cooker or other cooking equipment needing to be provided with a rotary switch, and the switch in the application can be understood to be also applied to the field needing to be provided with the rotary switch except the cooking utensil.

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

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, where the control method includes:

step S100, the detection circuit board 4 obtains the time in the high level and/or low level state;

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

In step S100, if the time in the high-level state changes during the rotation of the switch, the time in the high-level state is detected; if the time in the low level state is changed, detecting the time in the low level state; if there is a change in both the time in the high level state and the time in the low level state, the time in the high level and/or low level state may be detected.

In the control method provided by the technical solution of the third aspect of the present invention, the shielding member 12 rotates relative to the signal transmitting device and the signal receiving device, when the shielding member 12 rotates between the signal transmitting device and the signal receiving device, the shielding member 12 blocks the signal receiving device from receiving the signal from the signal transmitting device, and the circuit board 4 receives the signal 1 and is at a high level; when the gap region between two adjacent shields 12 rotates to between the signal transmitting device and the signal receiving device, the shields 12 do not obstruct the signal receiving device from receiving the signal from the signal transmitting device, and the circuit board 4 receives the signal of 0 at a low level. Therefore, the level acquired by the circuit board 4 is shifted between the high level and the low level in the state where the shield 12 is present or absent between the signal receiving device and the signal transmitting device.

In some embodiments, 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 change rules of time in the critical state and the non-critical state and the high level and/or low level state are opposite.

Taking the case that lengths of the plurality of shielding pieces 12 are all equal, and L1< L2< L3- < Ln as an example, in the switching rotation process, the plurality of shielding pieces 12 pass between the signal transmitting device and the signal receiving device, and the time in each high-level state acquired by the circuit board 4 is equal, and the time in the low-level state changes as the intervals between different adjacent shielding pieces 12 pass between the signal transmitting device and the signal receiving device. If the switch rotates counterclockwise, the distance between two adjacent shielding members 12 is gradually increased, and when L1, L2 … … Ln sequentially passes between the signal transmitting device and the signal receiving device, the time of the low level is sequentially t1, t2 … … tn, and the time t1, t2 … … tn in the low level state in the non-critical state is gradually increased. If t1, t2 … … tn decreases gradually, the judgment switch rotates clockwise. In the critical state, tn is greater than t1 if rotated counterclockwise and less than t1 if rotated clockwise. For example, judgment of L1, ln critical state: when tn is not less than 2×t1 or tn is not more than 2×t1, the critical point (critical state) is judged, 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; alternatively, L1 < L2 … … < Ln or L1 > L2 … … > Ln, and k1=k2 … … =kn; judging the rotation direction of the switch according to the time change in the high level and/or low level state, specifically comprising: 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; the rotation direction of the switch is judged according to the change of Wa/Ta or Ta/Wa.

In some embodiments, k1+l1=k2+l … … =kn+ln, and 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; the rotation direction of the switch is judged according to the change of Wa/(Wa+Ta) or Ta/(Wa+Ta).

In one embodiment, a transceiver component is disposed above the signal shielding device, and the transceiver component includes an optoelectronic transmitting tube IR1 and a receiving tube PT1. The signal shielding device is provided with a plurality of shielding pieces (HT 1, HT2- - -HTn) regularly distributed, and the distances between two adjacent shielding pieces are L1, L2- - -Ln respectively, wherein L1< L2< L3- - < Ln. The lengths of the shielding pieces are K1, K2, K3-Kn respectively. Where k1=k2=k3= - - - =kn. When rotated, HT1, HT2- - -HTn passes between IR1 and PT1 in sequence. Wherein the mask acts to prevent the receiving tube from receiving a signal (when the PORT1 signal is high), and when there is no mask between IR1 and PT1, PT1 receives normal, the PORT1 signal is low. The circuit board (chip IC 1) receives a signal 1 at a high level, and the chip receives a signal 0 at a low level; further Ln > =1.5xl1.

As shown in fig. 5, the control circuit includes a photoelectric emitting tube IR1, a receiving tube PT1, and resistors R1 and R2, and a plurality of shielding members sequentially pass through the emitting tube IR1 and the receiving tube PT1 to interfere with signal reception. The signal shielding device is in a counter-clockwise rotated state in fig. 5.

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

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

The method comprises the following steps:

1) When in rotation, the main control chip sequentially acquires the time Tn, tn+1, tn+2-in the low level state.

2) L1, ln critical state judgment: tn > =2×tn+1 or Tn < =2×tn+1, and is determined as the critical point.

Tn > =2Tn+ is counterclockwise, tn < =2Tn+ is clockwise,

3) And L1 and Ln are in a non-critical state, and Tn < Tn+1< Tn+2 is in a counterclockwise direction, and Tn > Tn+1> Tn+2 is in a clockwise direction.

A second method,

1) When the main control chip rotates, the main control chip sequentially acquires the time Tn, tn+1, tn+2-in the low level state, and simultaneously acquires the high level time Wn, wn+1, W+2-;

2) The single ratio Yn, yn+1, yn+2, - - -, where yn=tn/Wn is required to be obtained for k1=k2= - - - - =kn (shield length fixed), to eliminate the influence of external factors such as the rotation speed of the switch.

3) According to the obtained Yn, yn+1, yn+2- - -according to the steps 2) and 3) in the method one, the rotation direction is obtained.

Therefore, the code switch input is realized through a photoelectric receiving and transmitting mode, the receiving of the receiving tube is blocked from different directions through the shielding pieces HT1, HT2 and HTn, and the time change of signals is different, so that 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 a program corresponding to the executable program code by reading the executable program code stored in the memory, for realizing the control method as in any one of the technical solutions of the third aspect.

A fifth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method according to any one of the third aspects.

An embodiment of a fifth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method as in any of the above embodiments.

Further, it will be appreciated 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 preferred embodiments of the present invention include 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.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing 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 may even be paper or other suitable medium upon which the program is printed, as the program may 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 is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or part of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, where the program when executed includes one or a combination of the steps of the method embodiments.

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

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

In summary, according to the switch provided by the embodiment of the invention, the movement direction of the switch is obtained by changing the length of the input signal (high level and low level), so that the judgment of the movement direction of the switch is realized.

In the description of the present invention, the term "plurality" means two or more, unless explicitly specified and defined otherwise; unless specified or indicated otherwise, the terms "coupled," "fixed," and the like are to be construed broadly and are, for example, capable of being coupled either permanently or detachably, or integrally or electrically; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 present invention. In this specification, schematic representations of the above terms 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 of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. 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 circular arc and are sequentially arranged at intervals along the circumferential direction of the circular arc, and the signal shielding device rotates relative to the signal transmitting device and the signal receiving device so that the shielding pieces can shield or not shield signals between the signal transmitting device and the signal receiving device;

Wherein the lengths of a plurality of the shields are gradually increased or decreased along the circumferential direction of the signal shielding device, and/or the distance between two adjacent shields is gradually increased or decreased;

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

k1 K2 … … Kn gradually decreases or increases, l1=l … … =ln; alternatively, L1, L2 … … Ln gradually decreases or increases, k1=k … … =kn; alternatively, k1+l1=k2+l … … =kn+ln;

the switch is capable of:

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

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

k1 K2 … … Kn gradually decreases or increases, and l1=l … … =ln; alternatively, L1, L2 … … Ln gradually decreases or increases, and k1=k … … =kn; the judging the rotation direction of the switch according to the time change in the high level and/or low level state specifically comprises the following steps:

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,

k1+l1=k2+l … … =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:

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

2. A switch as claimed in claim 1, wherein,

the signal shielding device comprises an annular shielding device body, a plurality of shielding pieces are sequentially arranged along the circumference of the shielding device body, and the shielding pieces are positioned between the signal transmitting device and the signal receiving device.

3. A switch according to claim 1 or 2, characterized in that,

k1 The maximum value in K2 … … Kn is greater than 1.5 times the minimum value, or the maximum value in L1, L2 … … Ln is greater than 1.5 times the minimum value.

4. A switch according to claim 1 or 2, characterized in that,

k1 The minimum value in K2 … … Kn is greater than or equal to 1mm, or the minimum value in L1, L2 … … Ln is greater than or equal to 1mm.

5. A switch according to claim 1 or 2, characterized in that,

the signal transmitting device comprises a transmitting tube for transmitting 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; alternatively, 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 magnetic field change of the magnet and correspondingly conducting or disconnecting.

6. The switch of claim 5, wherein the switch comprises a switch,

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

7. A cooking appliance, comprising:

a cooking appliance body; and

the switch of any one of claims 1 to 6, the switch being disposed on the cooking appliance body and the signal shielding device rotating relative to the cooking appliance body.

8. A control method for the switch according to any one of claims 1 to 6, comprising:

the detection circuit board obtains time under a high level and/or low level state;

9. The control method according to claim 8, wherein,

the judging the rotation direction of the switch according to the time change in the high level and/or low level state specifically comprises the following steps:

and judging a critical state and a non-critical state, wherein the change rules of time in the critical state and the non-critical state and the high level and/or low level state are opposite.

10. A control device, which is characterized by comprising a memory and a processor; wherein the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, for realizing the control method according to claim 8 or 9.

11. A computer-readable storage medium having stored thereon a computer program, characterized by: the computer program, when executed by a processor, implements the steps of the control method as claimed in claim 8 or 9.