Buzzer volume adjusting circuit and microwave oven

Abstract

The utility model discloses a buzzer volume adjusting circuit and a microwave oven. The circuit comprises a temperature detection module, a first driving power supply, a second driving power supply, a first voltage regulation and control circuit, a second voltage regulation and control circuit, a buzzer regulation and control circuit, a buzzer and a control module. The control module is respectively connected with the temperature detection module, the first voltage regulation and control circuit, the second voltage regulation and control circuit and the buzzer regulation and control circuit; the first voltage regulation and control circuit is connected with the first driving power supply, and the first voltage regulation and control circuit is connected with the buzzer regulation and control circuit; the second voltage regulation and control circuit is connected with the second driving power supply, and the second voltage regulation and control circuit is connected with the buzzer regulation and control circuit; and the buzzer regulation and control circuit is connected with the buzzer. According to current temperature data detected by the temperature detection module, the control module outputs a conduction signal and a cut-off signal according to the current temperature data, so that the volume of the buzzer is adjusted while the corresponding driving power supply is selected, and a user is reminded of the current temperature condition of the microwave oven.

Description

Technical Field

[0001] The utility model relates to the technical field of buzzers, in particular to a buzzer volume regulating circuit and a microwave oven. Background Art

[0002] In most product designs, the conventional design scheme is to control the buzzer through a microcontroller, and most of them use the buzzer for prompts or alarms.

[0003] In the prior art, the control circuit of the buzzer adopts a fixed driving voltage source to realize the regulation of the buzzer, and its volume is fixed. It is difficult to adjust the driving voltage source and the volume of the buzzer at the same time, and the volume of the sound prompt of some buzzers is not related to the situation of the product. Utility Model Content

[0004] The purpose of the utility model is to provide a buzzer volume adjustment circuit and a microwave oven to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The utility model solves the technical problem by providing a buzzer volume adjustment circuit and a microwave oven.

[0006] In some embodiments of the first aspect of the utility model, a buzzer volume adjustment circuit includes: a temperature detection module, a first driving power supply, a second driving power supply, a first voltage control circuit, a second voltage control circuit, a buzzer control circuit, a buzzer, and a control module;

[0007] The temperature detection module is connected to the control module, and the control module is respectively connected to the input end of the first voltage control circuit, the input end of the second voltage control circuit and the input end of the buzzer control circuit;

[0008] The input end of the first voltage control circuit is connected to the first driving power supply, and the output end of the first voltage control circuit is connected to the input end of the buzzer control circuit;

[0009] The input end of the second voltage control circuit is connected to the second driving power supply, and the output end of the second voltage control circuit is connected to the input end of the buzzer control circuit;

[0010] The output end of the buzzer control circuit is connected to the buzzer.

[0011] Further, the first voltage control circuit includes: a first transistor, a first resistor and a second resistor;

[0012] The base of the first transistor is connected to the control module through the first resistor, the emitter of the first transistor is connected to the first voltage source, the collector of the first transistor is connected to the input end of the buzzer control circuit, and the second resistor is respectively connected to the base of the first transistor and the emitter of the first transistor.

[0013] Further, the second voltage control circuit includes: a second triode, a third resistor and a fourth resistor;

[0014] The base of the second transistor is connected to the control module through the third resistor, the emitter of the second transistor is connected to the second voltage source, the collector of the second transistor is connected to the input end of the buzzer control circuit, and the fourth resistor is respectively connected to the base of the second transistor and the emitter of the second transistor.

[0015] Further, the buzzer control circuit includes: a third transistor, a fifth resistor, a sixth resistor and a seventh resistor;

[0016] The base of the third triode is connected to the control module through the fifth resistor, the collector of the third triode is connected to the sixth resistor, the sixth resistor is respectively connected to the output end of the first voltage regulation circuit, the output end of the second voltage regulation circuit and the buzzer, the seventh resistor is respectively connected to the base of the third triode and the emitter of the third triode, and the emitter of the third triode is grounded.

[0017] Furthermore, a buzzer volume adjustment circuit further includes: a touch control screen;

[0018] The touch control screen is provided with a volume touch key, the output end of the volume touch key is connected to the control module, and the volume touch key is used to respond to user instructions and output a volume control signal to the control module.

[0019] Furthermore, a buzzer volume adjustment circuit also includes: a wireless communication module;

[0020] The wireless communication module is connected to the control module, and is used to receive an external volume control signal and send it to the control module.

[0021] Furthermore, a buzzer volume adjustment circuit also includes: a power management module;

[0022] The input end of the power management module is connected to the external power supply, and the power management module is used to receive the power supply voltage input by the external power supply, and step down the power supply voltage to output the first driving power supply and the second driving power supply.

[0023] Further, the power management module includes: a first buck voltage stabilization circuit and a second buck voltage stabilization circuit;

[0024] The input end of the first buck voltage stabilizing circuit is connected to an external power supply, the output end of the first buck voltage stabilizing circuit is respectively connected to the input end of the second buck voltage stabilizing circuit and the second voltage control circuit, and the output end of the second buck voltage stabilizing circuit is connected to the first voltage control circuit.

[0025] Furthermore, the control module includes: a SC95F8616 control chip.

[0026] In some embodiments of the second aspect of the present utility model, a microwave oven includes a buzzer volume adjustment circuit as in some embodiments of the first aspect of the present utility model.

[0027] The beneficial effects of the utility model are as follows: the temperature detection module is connected to the control module, the two driving power supplies are connected to the buzzer control circuit through the two voltage control circuits respectively, and the buzzer control circuit and the two voltage control circuits are connected to the control module. The current temperature data can be detected by the temperature detection module, the control module outputs a conduction signal and a cutoff signal, and controls the corresponding voltage control circuit to realize the conduction of the corresponding driving power supply, and the buzzer emits a prompt sound signal of the corresponding volume, thereby realizing the selection of the corresponding driving power supply according to the current temperature data while adjusting the volume of the buzzer to prompt the user of the current temperature of the microwave oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a partial circuit diagram of a buzzer volume adjustment circuit provided by an embodiment of the utility model;

[0029] Figure 2 This is a circuit diagram of a power management module of a buzzer volume adjustment circuit provided by an embodiment of the utility model;

[0030] Figure 3 The utility model is a frame diagram of a buzzer volume adjustment circuit provided in one embodiment.

[0031] Figure numerals: 100, first voltage control circuit, 200, second voltage control circuit, 300, buzzer control circuit, 400, control module, 500, temperature detection module, R1, first resistor, R2, second resistor Q1, first transistor, R5, fifth resistor, R6, sixth resistor, R7, seventh resistor, Q3, third transistor, 600, power management module, 610, first buck-stabilizing circuit, 620, second buck-stabilizing circuit, 700, touch control screen, 710, volume touch key, 800, wireless communication module. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and cannot be understood as limiting the present utility model.

[0033] It should be noted that although the functional module division is performed in the schematic diagram, in some cases, the module division can be different from that in the system.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0036] Reference Figures 1 to 3 In some embodiments of the first aspect of the utility model, a buzzer volume adjustment circuit includes: a control module 400, a buzzer, a buzzer control circuit 300, a first voltage control circuit 100, a first driving power supply, a second voltage control circuit 200, a second driving power supply and a temperature detection module 500.

[0037] The output end of the temperature detection module 500 is electrically connected to the input end of the control module 400, and the temperature detection module 500 is used to send the detected current temperature data to the control module 400. The temperature detection module 500 can be installed in the oven shell of the microwave oven to prevent the temperature detection module 500 from being affected by high temperature for a long time, which may cause the sensitivity of the temperature detection module 500 to decrease or the temperature detection module 500 to be damaged, thereby increasing the cost.

[0038] The input end of the buzzer control circuit 300 is electrically connected to the output end of the control module 400, and the output end of the buzzer control circuit 300 is electrically connected to the buzzer. The buzzer control circuit 300 is used to receive the conduction signal output by the control module 400 to control the buzzer to work, or receive the cutoff signal output by the control module 400 to control the buzzer to stop working.

[0039] The input end of the first voltage control circuit 100 is electrically connected to the output end of the control module 400 , the output end of the first voltage control circuit 100 is electrically connected to the input end of the buzzer control circuit 300 , and the first driving power supply is electrically connected to the input end of the first voltage control circuit 100 .

[0040] The first voltage control circuit 100 is used to receive the on signal output by the control module 400 to turn on the first voltage control circuit 100 and use the first driving power supply as the driving power supply of the buzzer control circuit 300. The first voltage control circuit 100 is also used to receive the off signal output by the control module 400 to turn off the first voltage control circuit 100.

[0041] The input end of the second voltage control circuit 200 is electrically connected to the output end of the control module 400 , the output end of the second voltage control circuit 200 is electrically connected to the input end of the buzzer control circuit 300 , and the second driving power supply is electrically connected to the input end of the second voltage control circuit 200 .

[0042] The second voltage control circuit 200 is used to receive the conduction signal output by the control module 400 to turn on the second voltage control circuit 200 and use the second driving power supply as the driving power supply of the buzzer control circuit 300. The second voltage control circuit 200 is also used to receive the cut-off signal output by the control module 400 to turn off the second voltage control circuit 200.

[0043] The control module 400 includes: a SC95F8616 control chip U1.

[0044] In one embodiment, the temperature detection module 500 sends the current temperature data to the control module 400, and the control module 400 receives the current temperature data. When the current temperature data is greater than the set first temperature value and less than the set second temperature value, the control module 400 outputs a conduction signal to the first voltage control circuit 100 and the buzzer control circuit 300, the first voltage control circuit 100 and the buzzer control circuit 300 are turned on, and the buzzer emits a prompt sound signal. The control module 400 outputs a cutoff signal to the second voltage control circuit 200 to select the first driving power supply as the driving power supply of the buzzer control circuit 300, and the prompt sound signal emitted by the current buzzer is a low volume.

[0045] In another embodiment, the temperature detection module 500 sends the current temperature data to the control module 400, and the control module 400 receives the current temperature data. When the current temperature data is greater than the set second temperature value, the control module 400 outputs a conduction signal to the second voltage control circuit 200 and the buzzer control circuit 300, turns on the second voltage control circuit 200 and the buzzer control circuit 300, and the buzzer emits a prompt sound signal. The control module 400 outputs a cutoff signal to the first voltage control circuit 100 to select the second driving power supply as the driving power supply of the buzzer control circuit 300, and the prompt sound signal emitted by the current buzzer is a high volume.

[0046] The utility model connects the buzzer control circuit 300 through two driving power supplies through two voltage control circuits respectively, and the buzzer control circuit 300 and the two voltage control circuits are connected to the control module 400 and the temperature detection module 500. The current temperature data can be detected by the temperature detection module 500, and the control module 400 outputs a conduction signal and a cutoff signal to control the operation of the corresponding voltage control circuit to realize the conduction of the corresponding driving power supply, and the buzzer sends a prompt sound signal of a corresponding volume to remind the user that the current microwave oven temperature is too high, thereby realizing the selection of the corresponding driving power supply according to the current temperature data while adjusting the volume of the buzzer.

[0047] Reference Figures 1 to 3 In some embodiments of the first aspect of the present utility model, the first voltage control circuit 100 includes: a first resistor R1, a second resistor R2 and a first transistor Q1.

[0048] One end of the first resistor R1 is electrically connected to the output end of the control module 400, the other end of the first resistor R1 is electrically connected to the base of the first transistor Q1, the emitter of the first transistor Q1 is electrically connected to the first voltage source, the collector of the first transistor Q1 is electrically connected to the input end of the buzzer control circuit 300, one end of the second resistor R2 is electrically connected to the base of the first transistor Q1, and the other end of the second resistor R2 is electrically connected to the emitter of the first transistor Q1.

[0049] In this embodiment, the control module 400 outputs a conduction signal, the first transistor Q1 is turned on, and the first voltage source provides a driving voltage to the buzzer control circuit 300 through the turned-on first transistor Q1. The first voltage source is a 5V DC power supply.

[0050] Reference Figures 1 to 3 In some embodiments of the first aspect of the present utility model, the second voltage control circuit 200 includes: a third resistor R3, a fourth resistor R4 and a second transistor Q2.

[0051] One end of the third resistor R3 is electrically connected to the output end of the control module 400, the other end of the third resistor R3 is electrically connected to the base of the second transistor Q2, the emitter of the second transistor Q2 is electrically connected to the second voltage source, the collector of the second transistor Q2 is electrically connected to the input end of the buzzer control circuit 300, one end of the fourth resistor R4 is electrically connected to the base of the second transistor Q2, and the other end of the fourth resistor R4 is electrically connected to the emitter of the second transistor Q2.

[0052] In this embodiment, the control module 400 outputs a conduction signal, the second transistor Q2 is turned on, and the second voltage source provides a driving voltage to the buzzer control circuit 300 through the turned-on second transistor Q2. The first voltage source is a 12V DC power supply.

[0053] Reference Figures 1 to 3 In some embodiments of the first aspect of the present utility model, the buzzer control circuit 300 includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and a third transistor Q3.

[0054] One end of the fifth resistor R5 is electrically connected to the output end of the control module 400, the other end of the fifth resistor R5 is electrically connected to the base of the third triode Q3, the collector of the third triode Q3 is electrically connected to one end of the sixth resistor R6, and the emitter of the third triode Q3 is grounded. One end of the sixth resistor R6 is also electrically connected to the buzzer, the collector of the first triode Q1 and the collector of the second triode Q2, and the other end of the sixth resistor R6 is grounded. One end of the seventh resistor R7 is electrically connected to the base of the third triode Q3, and the other end of the seventh resistor R7 is electrically connected to the emitter of the third triode Q3.

[0055] In this embodiment, the control module 400 outputs a conduction signal, the third transistor Q3 is turned on, and through any one of the turned-on voltage control circuits, the corresponding driving power supply supplies the driving voltage, and the buzzer sends a prompt sound signal of the corresponding volume.

[0056] The utility model connects the buzzer control circuit 300 through two driving power supplies through two voltage control circuits respectively, and the buzzer control circuit 300 and the two voltage control circuits are connected to the control module 400 and the temperature detection module 500. The current temperature data can be detected by the temperature detection module 500, and the control module 400 outputs a conduction signal and a cutoff signal to control the operation of the corresponding voltage control circuit to realize the conduction of the corresponding driving power supply, and the buzzer sends a prompt sound signal of a corresponding volume to remind the user that the current microwave oven temperature is too high, thereby realizing the selection of the corresponding driving power supply according to the current temperature data while adjusting the volume of the buzzer.

[0057] Reference Figures 1 to 3 In some embodiments of the first aspect of the utility model, the buzzer volume adjustment circuit further includes: a touch control screen 700 and a wireless communication module 800.

[0058] A volume touch key 710 is provided on the touch control screen 700 , and the input end of the control module 400 is electrically connected to the output end of the volume touch key 710 . The volume touch key 710 responds to user instructions, obtains a volume control signal, and sends the volume control signal to the control module 400 .

[0059] For example: when the prompt sound signal emitted by the current buzzer is at a high volume, the user touches the volume touch key 710, and the volume touch key 710 responds to the user's instruction, and the user's instruction is to lower the volume of the buzzer. Then the volume touch key 710 sends a volume control signal for lowering the volume to the control module 400, and the control module 400 outputs a conduction signal to the first voltage control circuit 100 and the buzzer control circuit 300, the first transistor Q1 and the third transistor Q3 are turned on, and the buzzer emits a prompt sound signal with a low volume. The control module 400 outputs a cutoff signal to the second voltage control circuit 200, and the second transistor Q2 is turned off, thereby realizing the switch from high volume to low volume.

[0060] The wireless communication module 800 is electrically connected to the control module 400. The wireless communication module 800 receives an external volume control signal and outputs the signal to the control module 400. The control module 400 outputs corresponding on-signals and off-signals according to the external volume control signal.

[0061] Reference Figures 1 to 3 In some embodiments of the first aspect of the present utility model, the buzzer volume adjustment circuit further includes: a power management module 600.

[0062] The input end of the power management module 600 is electrically connected to the external power supply. The external power supply outputs a power supply voltage to the power management module 600. The power management module 600 steps down the power supply voltage to output a first driving power supply and a second driving power supply.

[0063] The power management module 600 includes a first buck-stabilizing circuit 610 and a second buck-stabilizing circuit 620 .

[0064] The input end of the first buck-stabilizing circuit 610 is electrically connected to an external power supply, and the output end of the first buck-stabilizing circuit 610 is also electrically connected to the second voltage control circuit 200. The first buck-stabilizing circuit 610 receives the power supply voltage and steps down the power supply voltage to output the first driving power supply to the second voltage control circuit 200.

[0065] The first step-down voltage stabilizing circuit 610 includes: a transformer T1, a rectifier bridge BD1, and a first step-down voltage stabilizing chip U2.

[0066] The power supply voltage is stepped down by the transformer T1, the stepped-down power supply voltage is rectified by the rectifier bridge BD1, and stepped down and stabilized by the first voltage-stabilizing and step-down chip U2, thereby outputting a second driving power supply.

[0067] The output end of the first buck-stabilizing circuit 610 is electrically connected to the input end of the second buck-stabilizing circuit 620, and the output end of the second buck-stabilizing circuit 620 is also electrically connected to the second voltage control circuit 200. The second buck-stabilizing circuit 620 steps down the voltage of the first driving power supply to output the second driving power supply to the first voltage control circuit 100.

[0068] The second buck stabilizing circuit 620 includes a buck current limiting circuit, an RC parallel circuit and a second buck stabilizing chip U3.

[0069] The input end of the step-down and current limiting circuit is electrically connected to the output end of the first voltage-stabilizing and bucking chip U2, the output end of the step-down and current limiting circuit is electrically connected to the input end of the second voltage-stabilizing and bucking chip U3, the output end of the second voltage-stabilizing and bucking chip U3 is electrically connected to the input end of the RC parallel circuit, and the output end of the RC parallel circuit is electrically connected to the emitter of the first transistor Q1 to output the first driving power supply.

[0070] In this embodiment, the model of the first voltage regulator and buck chip U2 can be a 7812 voltage regulator and buck chip, and the model of the second voltage regulator and buck chip U3 can be a 7805 voltage regulator and buck chip. The models of the first voltage regulator and buck chip U2 and the second voltage regulator and buck chip U3 can also be other types, which are not specifically limited in the present utility model.

[0071] In some embodiments of the second aspect of the present utility model, a microwave oven includes a buzzer volume adjustment circuit as in some embodiments of the first aspect of the present utility model.

[0072] The microwave oven includes: a furnace cavity and a furnace shell. The temperature detection module is arranged inside the furnace shell, facing the furnace cavity, to detect the temperature of the furnace cavity and obtain current temperature data. The temperature detection module is not directly arranged inside the furnace cavity to prevent the temperature detection module from being affected by high temperature for a long time, so as to reduce the sensitivity of the temperature detection module or damage the temperature detection module, thereby increasing the cost.

[0073] The touch control screen is installed on the shell of the furnace shell, so that the user can trigger the volume touch key on the touch control screen.

[0074] The preferred implementation methods of the utility model are specifically described above, but the invention of the utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the utility model. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A buzzer volume adjustment circuit, characterized in that: include: A temperature detection module, a first driving power supply, a second driving power supply, a first voltage regulation circuit, a second voltage regulation circuit, a buzzer regulation circuit, a buzzer and a control module; The temperature detection module is connected to the control module, and the control module is respectively connected to the input end of the first voltage control circuit, the input end of the second voltage control circuit and the input end of the buzzer control circuit; The input end of the first voltage control circuit is connected to the first driving power supply, and the output end of the first voltage control circuit is connected to the input end of the buzzer control circuit; The input end of the second voltage control circuit is connected to the second driving power supply, and the output end of the second voltage control circuit is connected to the input end of the buzzer control circuit; The output end of the buzzer control circuit is connected to the buzzer.

2. A buzzer volume adjustment circuit according to claim 1, characterized in that: The first voltage control circuit includes: a first transistor, a first resistor and a second resistor; The base of the first transistor is connected to the control module through the first resistor, the emitter of the first transistor is connected to the first voltage source, the collector of the first transistor is connected to the input end of the buzzer control circuit, and the second resistor is respectively connected to the base of the first transistor and the emitter of the first transistor.

3. A buzzer volume adjustment circuit according to claim 1, characterized in that: The second voltage control circuit includes: a second triode, a third resistor and a fourth resistor; The base of the second transistor is connected to the control module through the third resistor, the emitter of the second transistor is connected to the second voltage source, the collector of the second transistor is connected to the input end of the buzzer control circuit, and the fourth resistor is respectively connected to the base of the second transistor and the emitter of the second transistor.

4. A buzzer volume adjustment circuit according to claim 1, characterized in that: The buzzer control circuit includes: a third transistor, a fifth resistor, a sixth resistor and a seventh resistor; The base of the third triode is connected to the control module through the fifth resistor, the collector of the third triode is connected to the sixth resistor, the sixth resistor is respectively connected to the output end of the first voltage regulation circuit, the output end of the second voltage regulation circuit and the buzzer, the seventh resistor is respectively connected to the base of the third triode and the emitter of the third triode, and the emitter of the third triode is grounded.

5. A buzzer volume adjustment circuit according to claim 1, characterized in that: Also includes: Touch control screen; The touch control screen is provided with a volume touch key, the output end of the volume touch key is connected to the control module, and the volume touch key is used to respond to user instructions and output a volume control signal to the control module.

6. A buzzer volume adjustment circuit according to claim 1, characterized in that: Also includes: Wireless communication module; The wireless communication module is connected to the control module, and is used to receive an external volume control signal and send it to the control module.

7. A buzzer volume adjustment circuit according to claim 1, characterized in that: Also includes: Power management module; The input end of the power management module is connected to the external power supply, and the power management module is used to receive the power supply voltage input by the external power supply, and step down the power supply voltage to output the first driving power supply and the second driving power supply.

8. A buzzer volume adjustment circuit according to claim 7, characterized in that: The power management module includes: a first buck voltage stabilization circuit and a second buck voltage stabilization circuit; The input end of the first buck voltage stabilizing circuit is connected to an external power supply, the output end of the first buck voltage stabilizing circuit is respectively connected to the input end of the second buck voltage stabilizing circuit and the second voltage control circuit, and the output end of the second buck voltage stabilizing circuit is connected to the first voltage control circuit.

9. A buzzer volume adjustment circuit according to claim 1, characterized in that: The control module includes: a SC95F8616 control chip.

10. A microwave oven, characterized in that: The invention comprises a buzzer volume adjustment circuit as claimed in any one of claims 1 to 9.

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