High-frequency heating equipment and its continuous power adjustment device

Abstract

The present invention discloses a high-frequency heating device and its continuous power adjustment device. Among them, the device includes: an operation unit, which includes a time setting unit and an output setting unit. The operation unit controls whether the high-frequency heating device performs heating work through the time setting unit, and outputs a heating power command through the output setting unit; a magnetron drive circuit, which includes an operation unit. The operation unit is used to control the output voltage of the magnetron drive circuit according to the heating power command when the high-frequency heating device performs heating work, so that the heating power of the high-frequency heating device is adjustable and continuously output. Thus, the continuous power adjustment device of the embodiment of the present invention can make the heating power of the high-frequency heating device adjustable and continuously output, and there is no need to modify the circuit structure of the operation unit. The circuit structure is simple, and the manufacturing cost can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of heating devices, and in particular, to a continuous power adjustment device for a high-frequency heating device and a high-frequency heating device. Background Art

[0002] Currently, high-frequency heating devices usually drive a variable-frequency magnetron drive power supply with a mechanical timer. For example, according to the food to be cooked and heated, the output setting and time setting of the mechanical timer are performed to heat the food. For example, by output setting, the AC power supply is interrupted (repeating 100% and 0%) to adjust the duty cycle of the control signal, thereby achieving the power adjustment of the high-frequency output.

[0003] However, the control method of interrupting the AC power supply cannot meet the adjustment requirements of continuously outputting low power at high frequency. For this reason, in order to achieve continuous output of high-frequency low power, high-frequency heating devices in related technologies add various arithmetic units to the control circuit of the operation unit to transmit the heating information input from the operation unit and output control signals such as PWM signals from the control circuit to the variable-frequency magnetron drive circuit, resulting in problems such as a complex control circuit structure and high manufacturing costs. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related technologies to some extent. For this reason, the first object of the present invention is to provide a continuous power adjustment device for a high-frequency heating device, which can make the heating power of the high-frequency heating device adjustable and continuously output, and without modifying the circuit structure of the operation unit, the circuit structure is simple, and the manufacturing cost can be effectively reduced.

[0005] The second object of the present invention is to provide a high-frequency heating device.

[0006] To achieve the above object, the continuous power adjustment device for a high-frequency heating device according to the first aspect embodiment of the present invention includes: an operation unit, the operation unit includes a time setting unit and an output setting unit, the operation unit controls whether the high-frequency heating device performs heating work through the time setting unit, and outputs a heating power command through the output setting unit; a magnetron drive circuit, the magnetron drive circuit includes an arithmetic unit, the arithmetic unit is connected to the output setting unit, and the arithmetic unit is used to control the output voltage of the magnetron drive circuit according to the heating power command when the high-frequency heating device performs heating work, so that the heating power of the high-frequency heating device is adjustable and continuously output.

[0007] The continuous power adjustment device of the high-frequency heating equipment according to the embodiment of the present invention, the operation unit controls whether the high-frequency heating equipment performs heating work through the time setting unit, outputs a heating power command through the output setting unit, and controls the output voltage of the magnetron drive circuit according to the heating power command through the operation unit in the magnetron drive circuit when the high-frequency heating equipment performs heating work. Thus, the heating power of the high-frequency heating equipment is adjustable and continuously output, and there is no need to modify the circuit structure of the operation unit. The circuit structure is simple, and the manufacturing cost can be effectively reduced.

[0008] In addition, the continuous power adjustment device of the high-frequency heating equipment according to the above embodiment of the present invention may further have the following additional technical features:

[0009] According to an embodiment of the present invention, the output setting unit includes at least one gear switch. Wherein, the operation unit generates a corresponding control signal according to the triggering situation of the at least one gear switch, and controls the output voltage of the magnetron drive circuit according to the corresponding control signal.

[0010] According to an embodiment of the present invention, when the output setting unit includes a first gear switch and a second gear switch, the operation unit includes: a first resistor, one end of the first resistor is connected to one end of the first gear switch; a second resistor, one end of the second resistor is connected to one end of the second gear switch, the other end of the second gear switch is connected to the other end of the first gear switch and has a first node; a third resistor, one end of the third resistor is respectively connected to the other end of the first resistor and the other end of the second resistor and has a second node, and the other end of the third resistor is grounded; a first controller, the power supply end of the first controller is connected to the first node, the input end of the first controller is connected to the second node, the first controller determines the states of the first gear switch and the second gear switch according to the voltage of the second node, and generates a corresponding control signal according to the states of the first gear switch and the second gear switch.

[0011] According to an embodiment of the present invention, when both the first gear switch and the second gear switch are in the closed state, the high-frequency heating device operates at a first heating power; when the first gear switch is in the closed state and the second gear switch is in the open state, the high-frequency heating device operates at a second heating power, wherein the second heating power is less than the first heating power; when the first gear switch is in the open state and the second gear switch is in the closed state, the high-frequency heating device operates at a third heating power, wherein the third heating power is less than the second heating power; when both the first gear switch and the second gear switch are in the open state, the high-frequency heating device operates at a fourth heating power, wherein the fourth heating power is less than the third heating power.

[0012] According to an embodiment of the present invention, when the output setting unit includes a third gear switch and a fourth gear switch, the arithmetic unit includes: a fourth resistor, one end of the fourth resistor is connected to one end of the third gear switch and has a third node, and the other end of the fourth resistor is grounded; a fifth resistor, one end of the fifth resistor is connected to one end of the fourth gear switch and has a fourth node, and the other end of the fifth resistor is grounded, wherein the other end of the fourth gear switch is connected to the other end of the third gear switch and has a fifth node; a second controller, a power supply terminal of the second controller is connected to the fifth node, a first input terminal of the second controller is connected to the third node, a second input terminal of the second controller is connected to the fourth node, the second controller determines the state of the third gear switch according to the voltage of the third node, determines the state of the fourth gear switch according to the voltage of the fourth node, and generates a corresponding control signal according to the states of the third gear switch and the fourth gear switch.

[0013] According to an embodiment of the present invention, when both the third gear switch and the fourth gear switch are in the closed state, both the third node and the fourth node are at high level, and the high-frequency heating device operates at a fifth heating power; when the third gear switch is in the closed state and the fourth gear switch is in the open state, the third node is at high level and the fourth node is at low level, and the high-frequency heating device operates at a sixth heating power, wherein the sixth heating power is less than the fifth heating power; when the third gear switch is in the open state and the fourth gear switch is in the closed state, the third node is at low level and the fourth node is at high level, and the high-frequency heating device operates at a seventh heating power, wherein the seventh heating power is less than the sixth heating power; when both the third gear switch and the fourth gear switch are in the open state, both the third node and the fourth node are at low level, and the high-frequency heating device operates at an eighth heating power, wherein the eighth heating power is less than the seventh heating power.

[0014] According to an embodiment of the present invention, linkage is performed between the time setting unit and the output setting unit.

[0015] According to an embodiment of the present invention, the magnetron drive circuit further includes: a first rectifying unit for converting the input alternating current into direct current; a smoothing unit for smoothing the direct current output by the first rectifying unit; a frequency converter unit for adjusting the voltage of the smoothed direct current under the control of the arithmetic unit to output a high-frequency voltage; and a voltage multiplier rectifying unit for performing voltage multiplication rectification on the high-frequency voltage and applying the voltage after voltage multiplication rectification to the magnetron so that the high-frequency heating device performs heating operation.

[0016] According to an embodiment of the present invention, the frequency converter unit includes a switching element, a resonant capacitor, and a step-up transformer. The switching element, the resonant capacitor, and the primary winding of the step-up transformer form a resonant circuit. Among them, the arithmetic unit controls the conduction and turn-off of the switching element to enable the resonant circuit to perform resonant operation, so as to convert the smoothed direct current into the high-frequency voltage.

[0017] To achieve the above object, the high-frequency heating device proposed in the second aspect embodiment of the present invention includes the continuous power adjustment device of the high-frequency heating device as described above.

[0018] The high-frequency heating device according to the embodiment of the present invention adopts the above continuous power adjustment device, which can make the heating power of the high-frequency heating device adjustable and continuously output, and there is no need to modify the circuit structure of the operation part. The circuit structure is simple, and the manufacturing cost can be effectively reduced.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a block diagram of a continuous power adjustment device for a high-frequency heating device according to an embodiment of the present invention;

[0021] Figure 2 It is a block diagram of a continuous power adjustment device for a high-frequency heating device according to an embodiment of the present invention

[0022] Figure 3 It is a schematic structural diagram of an output setting unit according to an embodiment of the present invention;

[0023] Figure 4 It is an electrical schematic diagram of a continuous power adjustment device for a high-frequency heating device according to an embodiment of the present invention;

[0024] Figure 5 It is an electrical schematic diagram of a continuous power adjustment device for a high-frequency heating device according to another embodiment of the present invention;

[0025] Figure 6 It is an electrical schematic diagram of a continuous power adjustment device for a high-frequency heating device according to a specific embodiment of the present invention;

[0026] Figure 7 It is a block diagram of a high-frequency heating device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] The continuous power adjustment device and the high-frequency heating device of the high-frequency heating device according to the embodiments of the present invention will be described below with reference to the drawings.

[0029] Figure 1 It is a block diagram of a continuous power adjustment device for a high-frequency heating device according to an embodiment of the present invention.

[0030] As Figure 1 shown, the continuous power adjustment device 100 of the high-frequency heating device includes: an operation unit 10 and a magnetron drive circuit 20.

[0031] Specifically, as Figure 2As shown in the figure, the operation unit 10 includes a time setting unit 101 and an output setting unit 102. The operation unit 10 controls whether the high-frequency heating device performs heating work through the time setting unit 101, and outputs a heating power command through the output setting unit 102. The magnetron drive circuit 20 includes an arithmetic unit 201. The arithmetic unit 201 is connected to the output setting unit 102. The arithmetic unit 201 is used to control the output voltage of the magnetron drive circuit 20 according to the heating power command when the high-frequency heating device performs heating work, so that the heating power of the high-frequency heating device is adjustable and continuously output.

[0032] It should be understood that the user can set the heating cooking time of the high-frequency heating device through the time setting unit 101. Among them, when the high-frequency heating device is in the heating cooking time period, power is supplied to the magnetron drive circuit 20 to control the high-frequency heating device to perform heating work.

[0033] Therefore, the continuous power adjustment device of the embodiment of the present invention controls the output voltage of the magnetron drive circuit 20 through the arithmetic unit 201 in the magnetron drive circuit 20 according to the heating power command output by the output setting unit 102, so that the heating power of the high-frequency heating device is adjustable and continuously output, without changing the circuit structure of the operation unit. The circuit structure is simple and can effectively reduce the manufacturing cost.

[0034] Furthermore, as Figure 3 shown, the output setting unit 102 includes at least one gear switch. Among them, the arithmetic unit 201 generates a corresponding control signal according to the triggering situation of at least one gear switch, and controls the output voltage of the magnetron drive circuit 20 according to the corresponding control signal.

[0035] It can be understood that the user can operate at least one gear switch on the output setting unit 102. The arithmetic unit 201 in the magnetron drive circuit 20 can generate a corresponding control signal according to the triggering situation of at least one gear switch, and control the magnetron drive circuit 20 to output an output voltage corresponding to the corresponding control signal.

[0036] The continuous power adjustment device 100 of the high-frequency heating device according to the embodiment of the present invention will be further described below.

[0037] Furthermore, as Figure 4 shown, according to the first embodiment of the present invention, when the output setting unit 102 includes a first gear switch S1 and a second gear switch S2, the arithmetic unit 201 includes: a first resistor R1, a second resistor R2, a third resistor R3, and a first controller M1.

[0038] Specifically, one end of the first resistor R1 is connected to one end of the first gear switch S1; one end of the second resistor R2 is connected to one end of the second gear switch S2, and the other end of the second gear switch S2 is connected to the other end of the first gear switch S1 and has a first node G1; one end of the third resistor R3 is connected to the other ends of the first resistor R1 and the second resistor R2 respectively and has a second node G2, and the other end of the third resistor R3 is grounded; the power supply terminal of the first controller M1 is connected to the first node G1, the input terminal of the first controller M1 is connected to the second node G2, and the first controller M1 determines the states of the first gear switch S1 and the second gear switch S2 according to the voltage of the second node G2, and generates corresponding control signals according to the states of the first gear switch S1 and the second gear switch S2.

[0039] That is to say, the first controller M1 can determine the states of the different first gear switch S1 and the second gear switch S2 according to the voltage of the second node G2, so as to generate corresponding control signals according to the states of the different first gear switch S1 and the second gear switch S2, thereby controlling the magnetron drive circuit 20 to output an output voltage corresponding to the corresponding control signal.

[0040] Table 1

[0041]

[0042] It can be seen from Table 1 that the states of the first gear switch S1 and the second gear switch S2 can include the following four states, and each state corresponds to a different heating power:

[0043] (A) When both the first gear switch S1 and the second gear switch S2 are in the closed state, the high-frequency heating device operates at the first heating power P1.

[0044] Specifically, as shown in the figure, if both the first gear switch S1 and the second gear switch S2 are in the closed state, the first resistor R1 and the second resistor R2 form a parallel resistor and are connected between the power supply terminal and the input terminal of the first controller M1. At this time, the voltage at the power supply terminal of the first controller M1 is divided by the parallel resistor and the third resistor R3, and then input to the input terminal of the first controller M1 through the second node G2. The high-frequency heating device operates at the first heating power P1 according to the input voltage.

[0045] Optionally, the first heating power P1 can be 100% of the total heating power P.

[0046] (B) When the first gear switch S1 is in the closed state and the second gear switch S2 is in the open state, the high-frequency heating device operates at the second heating power P2, where the second heating power P2 is less than the first heating power P1.

[0047] Specifically, as shown in the figure, if the first gear switch S1 is in the closed state and the second gear switch S2 is in the open state, the first resistor R1 is separately connected between the power supply terminal and the input terminal of the first controller M1. At this time, after the voltage at the power supply terminal of the first controller M1 is divided by the first resistor R1 and the third resistor R3, it is input to the input terminal of the first controller M1 through the second node G2. The high-frequency heating device operates at the second heating power P2 according to the input voltage.

[0048] Optionally, the second heating power P2 can be 75% of the total heating power P.

[0049] (C) When the first gear switch S1 is in the open state and the second gear switch S2 is in the closed state, the high-frequency heating device operates at the third heating power P3, where the third heating power P3 is less than the second heating power P2.

[0050] Specifically, as shown in the figure, if the first gear switch S1 is in the open state and the second gear switch S2 is in the closed state, the second resistor R2 is separately connected between the power supply terminal and the input terminal of the first controller M1. At this time, after the voltage at the power supply terminal of the first controller M1 is divided by the second resistor R2 and the third resistor R3, it is input to the input terminal of the first controller M1 through the second node G2. The high-frequency heating device operates at the third heating power P3 according to the input voltage.

[0051] Optionally, the third heating power P3 can be 50% of the total heating power P.

[0052] (D) When both the first gear switch S1 and the second gear switch S2 are in the open state, the high-frequency heating device operates at the fourth heating power P4, where the fourth heating power P4 is less than the third heating power P3.

[0053] Specifically, as shown in the figure, if both the first gear switch S1 and the second gear switch S2 are in the open state, the circuit between the power supply terminal and the input terminal of the first controller M1 is open. At this time, the second node G2 inputs the open-circuit voltage to the input terminal of the first controller M1. The high-frequency heating device operates at the fourth heating power P4 according to the input voltage.

[0054] Optionally, the fourth heating power P4 can be 25% of the total heating power P.

[0055] Thus, for the continuous power adjustment device of the high-frequency heating device according to the embodiment of the present invention, the user can change the state of the first gear switch and the second gear switch to change the resistance state between the power supply terminal and the input terminal of the first controller, so as to adjust the voltage input to the input terminal of the first controller. Thereby, the high-frequency heating device is controlled to operate at different heating powers, realizing adjustable and continuous output of the heating power of the high-frequency heating device.

[0056] Further, as Figure 5 shown, according to the second embodiment of the present invention, when the output setting unit 102 includes the third gear switch S3 and the fourth gear switch S4, the operation unit 201 includes: a fourth resistor R4, a fifth resistor R5, and a second controller M2.

[0057] Specifically, one end of the fourth resistor R4 is connected to one end of the third gear switch S3 and has a third node G3, and the other end of the fourth resistor R4 is grounded; one end of the fifth resistor R5 is connected to one end of the fourth gear switch S4 and has a fourth node G4, and the other end of the fifth resistor R5 is grounded, wherein the other end of the fourth gear switch S4 is connected to the other end of the third gear switch S3 and has a fifth node G5; the power supply terminal of the second controller M2 is connected to the fifth node G5, the first input terminal of the second controller M2 is connected to the third node G3, the second input terminal of the second controller M2 is connected to the fourth node G4, and the second controller M2 determines the state of the third gear switch S3 according to the voltage of the third node G3, determines the state of the fourth gear switch S4 according to the voltage of the fourth node G4, and generates a corresponding control signal according to the states of the third gear switch S3 and the fourth gear switch S4.

[0058] That is to say, the second controller M2 can determine the states of different third gear switches S3 and fourth gear switches S4 according to the voltage of the third node G3 and the voltage of the fourth node G4, and generate a corresponding control signal according to the states of different third gear switches S3 and fourth gear switches S4, so as to control the magnetron drive circuit 20 to output an output voltage corresponding to the corresponding control signal.

[0059] Table 2

[0060]

[0061] As can be seen from Table 2, the states of the third gear switch S3 and the fourth gear switch S4 can include the following four states, and each state corresponds to a different heating power:

[0062] (A) Further, when both the third gear switch S3 and the fourth gear switch S4 are in the closed state, both the third node G3 and the fourth node G4 are at a high level, and the high-frequency heating device operates at a fifth heating power P5.

[0063] Specifically, as shown in the figure, if both the third gear switch S3 and the fourth gear switch S4 are in the closed state, then both the third node G3 and the fourth node G4 are at a high level. At this time, the second controller M2 controls the high-frequency heating device to operate at a fifth heating power P5 according to the high levels input to the first input terminal and the second input terminal.

[0064] Optionally, the fifth heating power P5 can be 100% of the total heating power P.

[0065] (B) When the third gear switch S3 is in the closed state and the fourth gear switch S4 is in the open state, the third node G3 is at a high level and the fourth node G4 is at a low level, and the high-frequency heating device operates at a sixth heating power P6, where the sixth heating power P6 is less than the fifth heating power P5.

[0066] Specifically, as shown in the figure, if the third gear switch S3 is in the closed state and the fourth gear switch S4 is in the open state, then the third node G3 is at a high level and the fourth node G4 is at a low level. At this time, the second controller M2 controls the high-frequency heating device to operate at the sixth heating power P6 according to the high level input at the first input terminal and the low level input at the second input terminal.

[0067] Optionally, the sixth heating power P6 can be 75% of the total heating power P.

[0068] (C) When the third gear switch S3 is in the open state and the fourth gear switch S4 is in the closed state, the third node G3 is at a low level and the fourth node G4 is at a high level, and the high-frequency heating device operates at a seventh heating power P7, where the seventh heating power P7 is less than the sixth heating power P6.

[0069] Specifically, as shown in the figure, if the third gear switch S3 is in the open state and the fourth gear switch S4 is in the closed state, then the third node G3 is at a low level and the fourth node G4 is at a high level. At this time, the second controller M2 controls the high-frequency heating device to operate at the seventh heating power P7 according to the low level input at the first input terminal and the high level input at the second input terminal.

[0070] Optionally, the seventh heating power P7 can be 50% of the total heating power P.

[0071] (D) When both the third gear switch S3 and the fourth gear switch S4 are in the open state, both the third node G3 and the fourth node G4 are at a low level, and the high-frequency heating device operates at an eighth heating power P8, where the eighth heating power P8 is less than the seventh heating power P7.

[0072] Specifically, as shown in the figure, if both the third gear switch S3 and the fourth gear switch S4 are in the open state, then both the third node G3 and the fourth node G4 are at a low level. At this time, the second controller M2 controls the high-frequency heating device to operate at the eighth heating power P8 according to the low levels input at the first input terminal and the second input terminal.

[0073] Optionally, the eighth heating power P8 can be 25% of the total heating power P.

[0074] Thus, for the continuous power adjustment device of the high-frequency heating device according to the embodiments of the present invention, a user can change the levels of the signals input to the first input terminal and the second input terminal of the second controller by changing the states of the three-position switch and the fourth-position switch, so as to control the high-frequency heating device to work at different heating powers, realizing adjustable and continuously output heating power of the high-frequency heating device.

[0075] Further, the time setting unit 101 and the output setting unit 102 are linked.

[0076] It should be understood that the time setting unit 101 and the output setting unit 102 are linked to make the AC power load work. Among them, within the set heating time, the time setting unit 101 supplies AC power to the magnetron drive circuit 20, and sends a heating power command to the magnetron drive circuit 20 together with the output setting unit 102, so that the magnetron drive circuit 20 continuously outputs variably.

[0077] Further, as Figure 6 shown, the magnetron drive circuit 20 further includes: a first rectification unit 202, a smoothing unit 203, an inverter unit 204, and a voltage doubling rectification unit 205.

[0078] Specifically, the first rectification unit 202 is used to convert the input alternating current into direct current; the smoothing unit 203 is used to smooth the direct current output by the first rectification unit 202; the inverter unit 204 adjusts the voltage of the smoothed direct current under the control of the operation unit 201 to output a high-frequency voltage; the voltage doubling rectification unit 205 is used to perform voltage doubling rectification on the high-frequency voltage and apply the voltage after voltage doubling rectification to the magnetron, so that the high-frequency heating device performs heating work.

[0079] That is to say, the magnetron drive circuit 20 can convert the input alternating current into direct current through the first rectification unit 202, smooth the direct current output by the first rectification unit 202 through the smoothing unit 203, adjust the voltage of the smoothed direct current under the control of the operation unit 201 through the inverter unit 204 to output a high-frequency voltage, perform voltage doubling rectification on the high-frequency voltage through the voltage doubling rectification unit 205, and apply the voltage after voltage doubling rectification to the magnetron, so that the high-frequency heating device performs heating work.

[0080] Further, as Figure 6 shown, the inverter unit 204 includes a switching component 2041, a resonance capacitor 2042, and a step-up transformer 2043.

[0081] Specifically, the switching component 2041, the resonant capacitor 2042, and the primary winding of the step-up transformer 2043 form a resonant circuit. Among them, the operation unit 201 controls the on and off of the switching component 2041 to make the resonant circuit operate in resonance, so as to convert the smoothed direct current into a high-frequency voltage.

[0082] That is to say, the operation unit 201 can control the on and off of the switching component 2041, so that the resonant circuit formed by the switching component 2041, the resonant capacitor 2042, and the primary winding of the step-up transformer 2043 operates in resonance, so as to convert the smoothed direct current into a high-frequency voltage.

[0083] In summary, for the continuous power adjustment device of the high-frequency heating device according to the embodiment of the present invention, the operation unit controls whether the high-frequency heating device performs heating work through the time setting unit, outputs a heating power command through the output setting unit, and controls the output voltage of the magnetron drive circuit through the operation unit in the magnetron drive circuit according to the heating power command when the high-frequency heating device performs heating work. Thus, the heating power of the high-frequency heating device is adjustable and continuously output, and there is no need to modify the circuit structure of the operation unit. The circuit structure is simple, and the manufacturing cost can be effectively reduced.

[0084] Figure 7 It is a block diagram of a high-frequency heating device according to an embodiment of the present invention.

[0085] As Figure 7 shown, the high-frequency heating device 1000 proposed in the embodiment of the present invention includes the continuous power adjustment device 100 of the high-frequency heating device in the above embodiment of the present invention.

[0086] Optionally, the high-frequency heating device may include, but is not limited to, a microwave oven, an induction cooker, and a wall breaker.

[0087] It should be noted that the specific implementation manners of the high-frequency heating device 1000 in the embodiment of the present invention correspond one-to-one to the specific implementation manners of the continuous power adjustment device 100 of the high-frequency heating device in the above embodiment of the present invention, and will not be described in detail here.

[0088] In summary, for the high-frequency heating device according to the embodiment of the present invention, by adopting the above continuous power adjustment device, the heating power of the high-frequency heating device can be adjustable and continuously output, and there is no need to modify the circuit structure of the operation unit. The circuit structure is simple, and the manufacturing cost can be effectively reduced.

[0089] It should be noted that the logic and / or steps represented in the flowchart or described otherwise herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch instructions from the instruction execution system, apparatus, or device and execute the instructions), or in combination with these instruction execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of the computer-readable medium include the following: an electrical connection part with one or more wirings (electronic device), 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 can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other appropriate processing when necessary, and then stored in a computer memory.

[0090] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0091] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0092] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0093] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0094] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0096] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation on the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A continuous power adjustment device for a high-frequency heating device, characterized in that, Including: An operation unit, the operation unit includes a time setting unit and an output setting unit. The operation unit controls whether the high-frequency heating device performs heating work through the time setting unit, and outputs a heating power command through the output setting unit; A magnetron drive circuit, the magnetron drive circuit includes an operation unit, the operation unit is connected to the output setting unit, and the operation unit is used to control the output voltage of the magnetron drive circuit according to the heating power command when the high-frequency heating device performs heating work, so that the heating power of the high-frequency heating device is adjustable and continuously output; When the output setting unit includes a first gear switch and a second gear switch, the operation unit includes: A first resistor, one end of the first resistor is connected to one end of the first gear switch; A second resistor, one end of the second resistor is connected to one end of the second gear switch, the other end of the second gear switch is connected to the other end of the first gear switch and has a first node; A third resistor, one end of the third resistor is connected to the other end of the first resistor and the other end of the second resistor respectively and has a second node, and the other end of the third resistor is grounded; A first controller, the power supply terminal of the first controller is connected to the first node, the input terminal of the first controller is connected to the second node, the first controller determines the states of the first gear switch and the second gear switch according to the voltage of the second node, and generates a corresponding control signal according to the states of the first gear switch and the second gear switch.

2. The continuous power adjustment device of the high-frequency heating device according to claim 1, characterized in that, The output setting unit includes at least one gear switch. Wherein, the operation unit generates a corresponding control signal according to the triggering situation of the at least one gear switch, and controls the output voltage of the magnetron drive circuit according to the corresponding control signal.

3. The continuous power adjustment device of the high-frequency heating device according to claim 1 or 2, characterized in that, Wherein, When both the first gear switch and the second gear switch are in the closed state, the high-frequency heating device operates at a first heating power; When the first gear switch is in the closed state and the second gear switch is in the open state, the high-frequency heating device operates at a second heating power, wherein the second heating power is less than the first heating power; When the first gear switch is in the open state and the second gear switch is in the closed state, the high-frequency heating device operates at a third heating power, wherein the third heating power is less than the second heating power; When both the first gear switch and the second gear switch are in the open state, the high-frequency heating device operates at a fourth heating power, wherein the fourth heating power is less than the third heating power.

4. The continuous power adjustment device of the high-frequency heating device according to claim 1 or 2, characterized in that, When the output setting unit includes a third gear switch and a fourth gear switch, the operation unit includes: A fourth resistor, one end of the fourth resistor is connected to one end of the third gear switch and has a third node, and the other end of the fourth resistor is grounded; A fifth resistor, one end of the fifth resistor is connected to one end of the fourth gear switch and has a fourth node, and the other end of the fifth resistor is grounded. Wherein, the other end of the fourth gear switch is connected to the other end of the third gear switch and has a fifth node; A second controller, the power supply terminal of the second controller is connected to the fifth node, the first input terminal of the second controller is connected to the third node, the second input terminal of the second controller is connected to the fourth node, and the second controller determines the state of the third gear switch according to the voltage of the third node, determines the state of the fourth gear switch according to the voltage of the fourth node, and generates a corresponding control signal according to the states of the third gear switch and the fourth gear switch.

5. The continuous power adjustment device of the high-frequency heating device according to claim 4, characterized in that, Wherein, When both the third gear switch and the fourth gear switch are in the closed state, both the third node and the fourth node are at high level, and the high-frequency heating device operates at a fifth heating power; When the third gear switch is in the closed state and the fourth gear switch is in the open state, the third node is at high level and the fourth node is at low level, and the high-frequency heating device operates at a sixth heating power, wherein the sixth heating power is less than the fifth heating power; When the third gear switch is in the open state and the fourth gear switch is in the closed state, the third node is at low level and the fourth node is at high level, and the high-frequency heating device operates at a seventh heating power, wherein the seventh heating power is less than the sixth heating power; When both the third gear switch and the fourth gear switch are in the open state, both the third node and the fourth node are at low level, and the high-frequency heating device operates at an eighth heating power, wherein the eighth heating power is less than the seventh heating power.

6. The continuous power adjustment device of the high-frequency heating device according to claim 1, characterized in that, Linkage is performed between the time setting unit and the output setting unit.

7. The continuous power adjustment device of the high-frequency heating equipment according to claim 1, characterized in that The magnetron drive circuit further includes: A first rectifying unit for converting the input alternating current into direct current; A smoothing unit for smoothing the direct current output by the first rectifying unit; An inverter unit for adjusting the voltage of the smoothed direct current under the control of the arithmetic unit to output a high-frequency voltage; A voltage multiplier rectifying unit for voltage multiplying and rectifying the high-frequency voltage and applying the voltage after voltage multiplying and rectifying to the magnetron so that the high-frequency heating device performs heating work.

8. The continuous power adjustment device of the high-frequency heating device according to claim 7, characterized in that The inverter unit includes a switching element, a resonant capacitor and a step-up transformer. The switching element, the resonant capacitor and the primary winding of the step-up transformer form a resonant circuit. Wherein, the arithmetic unit controls the on and off of the switching element to make the resonant circuit perform resonant work so as to convert the smoothed direct current into the high-frequency voltage.

9. A high-frequency heating device, characterized in that, A continuous power adjustment device including the high-frequency heating device according to any one of claims 1-8.

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