A power supply device for an oven function expansion module and an oven.

Abstract

This utility model discloses a power supply device for an oven function expansion module and an oven, relating to the field of smart home technology. The power supply device for the oven function expansion module includes: a processor, a first resistor, a first module interface, a first power supply, and a power supply module. The processor, the first resistor, the first module interface, the first power supply, and the function expansion module constitute a signal detection circuit for determining the module type of the function expansion module. The power supply module, the first module interface, and the function expansion module constitute a power supply circuit for providing power to the function expansion module when the processor determines that the module type of the function expansion module meets the power supply conditions. This utility model provides a function expansion module power supply device with strong interface adaptability, high utilization rate, and low cost, which can accurately provide power to function modules that meet the power supply conditions, improving the user's oven usage experience.

Description

Technical Field

[0001] This utility model relates to the field of smart home technology, and in particular to a power supply device and an oven for an oven function expansion module. Background Technology

[0002] As residents' living standards improve, users are demanding higher levels of intelligence in home appliances, such as the expandability of oven functions. Currently, most ovens on the market are equipped with a food probe interface. When a temperature probe is inserted into this interface, the oven directly supplies power to it. If the temperature probe malfunctions or has an abnormal connection, it will directly affect the oven's operational safety. Secondly, the food probe interface is only for inserting temperature probes and cannot be used to connect functional modules such as ultraviolet disinfection and negative ion purification. If users need to use ultraviolet disinfection and negative ion purification functions externally, they also need to configure dedicated power supply components for these modules. This results in low utilization of the functional interface and high costs for expanding the oven's functionality.

[0003] Therefore, proposing a power supply device for functional expansion modules that has strong interface adaptability, high utilization rate, and low cost, and accurately providing power to functional modules that meet the power supply conditions, is one of the urgent problems to be solved in the field of smart homes. Utility Model Content

[0004] This utility model provides a power supply device for an oven function expansion module and an oven. It designs a function expansion module power supply device with strong interface adaptability, high utilization rate and low cost, which can accurately provide power to function modules that meet the power supply conditions, thereby improving the user's oven usage experience.

[0005] According to one aspect of the present invention, a power supply device for an oven function expansion module is provided. The power supply device includes: a processor, a first resistor, a first module interface, a first power supply, and a power supply module; wherein the first module interface is connected to the oven function expansion module, the first resistor, the first power supply, and the power supply module respectively, and the processor is connected to the first resistor and the power supply module respectively.

[0006] The processor, the first resistor, the first module interface, the first power supply, and the functional expansion module constitute a signal detection loop, which is used to determine the module type of the functional expansion module.

[0007] The power supply module, the first module interface, and the function expansion module constitute a power supply circuit, which is used to provide power to the function expansion module when the processor determines that the module type of the function expansion module meets the power supply conditions.

[0008] Optionally, the functional expansion module includes a second module interface, a second resistor, and a functional circuit; wherein, the second module interface includes an identification code port, a signal positive port, a power supply positive port, and a power supply ground port; the identification code port of the second module interface is connected to the first end of the second resistor, and the signal positive port of the second module interface is connected to the second end of the second resistor; the power supply positive port of the second module interface is connected to the first end of the functional circuit, and the power supply ground port of the second module interface is connected to the second end of the functional circuit.

[0009] Optionally, the first module interface includes an identification code port, a signal positive port, a power supply positive port, and a power supply ground port; wherein, the identification code port of the first module interface is connected to the identification code port of the second module interface and the first end of the first resistor, the second end of the first resistor is connected to the voltage acquisition terminal of the processor, the signal positive port of the first module interface is connected to the signal positive port of the second module interface and the first power supply, the power supply positive port of the first module interface is connected to the power supply positive port of the second module interface, and the power supply ground port of the first module interface is connected to the power supply ground port of the second module interface and the ground signal.

[0010] Optionally, the power supply module includes a second power supply and a first field-effect transistor; wherein, the second power supply is connected to the source of the first field-effect transistor, the drain of the first field-effect transistor is connected to the positive power supply port of the first module interface, and the gate of the first field-effect transistor is connected to the first control port of the processor.

[0011] Optionally, the signal flow in the signal detection loop is sequentially: first power supply, positive signal port of the first module interface, positive signal port of the second module interface, second end of the second resistor, first end of the second resistor, identification code port of the second module interface, identification code port of the first module interface, first end of the first resistor, second end of the first resistor, and voltage acquisition terminal of the processor.

[0012] Optionally, the processor is specifically used to: determine the resistance value of the second resistor based on the sampled voltage value obtained from the voltage acquisition terminal, the resistance value of the first resistor, and the voltage value of the first power supply; and determine the module type of the functional expansion module based on the resistance value of the second resistor, the correspondence between the resistance value and the functional module.

[0013] Optionally, the resistance value of the second resistor can be determined as follows: Vr = V1 × R1 / (R1 + R2); where Vr represents the sampling voltage value, V1 represents the voltage value of the first power supply, R1 represents the resistance value of the first resistor, and R2 represents the resistance value of the second resistor.

[0014] Optionally, the processor is specifically configured to: when the module type of the functional expansion module meets the power supply conditions, control the first control port to send a low-level signal to the gate of the first field-effect transistor to turn on the first field-effect transistor; when the module type of the functional expansion module does not meet the power supply conditions, control the first control port to send a high-level signal to the gate of the first field-effect transistor to turn off the first field-effect transistor.

[0015] Optionally, the signal flow in the power supply circuit is as follows: second power supply, source of the first field-effect transistor, drain of the first field-effect transistor, positive power supply port of the first module interface, positive power supply port of the second module interface, first terminal of the functional circuit, second terminal of the functional circuit, ground power supply port of the second module interface, ground power supply port of the first module interface, and ground signal.

[0016] According to another aspect of the present invention, an oven is provided, the oven comprising: an oven shell and a power supply device for any one of the oven function expansion modules in the embodiments of the present invention;

[0017] The power supply for the oven function expansion module is located inside the oven housing.

[0018] The power supply device for the oven function expansion module of this utility model includes: a processor, a first resistor, a first module interface, a first power supply, and a power supply module; wherein, the first module interface is connected to the oven function expansion module, the first resistor, the first power supply, and the power supply module respectively, and the processor is connected to the first resistor and the power supply module respectively; the processor, the first resistor, the first module interface, the first power supply, and the function expansion module constitute a signal detection circuit for determining the module type of the function expansion module; the power supply module, the first module interface, and the function expansion module constitute a power supply circuit for providing power to the function expansion module when the processor determines that the module type of the function expansion module meets the power supply conditions. The power supply device of the oven function expansion module of this utility model determines the status and type of the external function module through a signal detection circuit, and judges whether the current status of the external function module is suitable for power supply. When the current status of the external function module is suitable for power supply, power is provided to the function expansion module through the power supply circuit. Power is only provided to the external function modules that are suitable for power supply, ensuring the safety of the external function modules and the oven. Secondly, the first module interface of the power supply device of the oven function expansion module of this utility model is a universal interface, which is suitable for various types of function modules such as temperature probes, ultraviolet disinfection modules and negative ion purification modules. It does not require setting a dedicated interface for each function module, nor does it require providing an additional power supply. The interface has high utilization and strong adaptability, which can effectively reduce the design cost and function expansion cost of the oven. This solution addresses the issue that when a temperature probe is inserted into the food probe interface, the oven directly powers the temperature probe, which could directly affect the oven's operational safety if the temperature probe malfunctions or is improperly connected. It also solves the problem that the food probe interface is limited to temperature probes and cannot be used to connect functional modules such as UV sterilization and negative ion purification. If users need to use these functions externally, dedicated power supply components are required, resulting in low utilization of the functional interfaces and high costs for expanding the oven's functionality.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a structural schematic diagram of the power supply device for an oven function expansion module provided by this utility model;

[0022] Figure 2 This is a schematic diagram of an oven shell provided by this utility model. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] Figure 1 This is a structural diagram of a power supply device for an oven function expansion module provided by this utility model. This embodiment provides a function expansion module power supply device with strong interface adaptability, high utilization rate, and low cost. It can accurately provide power to function modules that meet the power supply conditions, improving the user's oven usage experience. (Reference) Figure 1 The device specifically includes: a processor, a first resistor, a first module interface, a first power supply and a power supply module; the first module interface is connected to the oven's function expansion module, the first resistor, the first power supply and the power supply module respectively, and the processor is connected to the first resistor and the power supply module respectively.

[0026] The processor, the first resistor, the first module interface, the first power supply, and the functional expansion module constitute a signal detection circuit to determine the module type of the functional expansion module; the power supply module, the first module interface, and the functional expansion module constitute a power supply circuit to provide power to the functional expansion module when the processor determines that the module type of the functional expansion module meets the power supply conditions.

[0027] Specifically, a processor is a component capable of data processing, instruction issuance, and signal control, such as a microcontroller or programmable logic controller. A function expansion module can be understood as an extension of the oven's functionality. These modules are externally connected to the first module interface and include, but are not limited to, temperature probes, ultraviolet disinfection modules, and negative ion purification modules. Users connect the corresponding module to the first module interface to access the desired function. Different function modules have different resistances. A signal detection circuit can be used to detect the resistance value of the external function module (resistance is obtained by acquiring and converting voltage signals), thereby determining the type of the external function module. The resistance value can also determine the status of the external function module; a properly connected, fault-free function module has a different resistance value than a poorly connected, faulty function module. Data processing and resistance calculation are handled by the processor. Once the processor determines that the function expansion module's type meets the power supply requirements—for example, if the external function module is an extension of the oven's functionality, is properly connected, and fault-free—it will control the power supply circuit to provide power to the function expansion module, for example, by activating the power supply circuit to enable it to perform its power supply task.

[0028] The signal detection circuit and power supply circuit of this utility model operate independently. This independent design can avoid signal interference and enable practical testing. If the external functional module does not meet the power supply conditions, the power will be cut off in time to ensure the safety of the functional module and the oven.

[0029] Figure 1 The numbers outside the first resistor indicate the port number of the first resistor, the numbers outside the second resistor indicate the port number of the second resistor, the numbers outside the functional circuit indicate the port number of the functional circuit, GND indicates the ground signal, and the letters outside the first field-effect transistor indicate the port information of the first field-effect transistor: G indicates the gate, D indicates the drain, and S indicates the source.

[0030] Combination Figure 1 It can be seen that the power supply module includes a second power supply and a first field-effect transistor; the function expansion module includes a second module interface, a second resistor, and functional circuitry; the second module interface includes an identification code port ( Figure 1 The ID terminal of the second module interface), the positive signal port ( Figure 1 The second module interface's VCC-SIG terminal), and the power supply positive terminal ( Figure 1 The second module interface's VCC-PWR terminal and the power supply ground port ( Figure 1 The second module interface has a GND-PWR port. The first module interface includes an identity code port. Figure 1 The ID terminal of the first module interface can be used to read the identity information of the functional expansion module), and the positive signal port ( Figure 1The first module interface's VCC-SIG terminal), the power supply positive terminal ( Figure 1 The first module interface's VCC-PWR terminal and the power supply ground port ( Figure 1 (GND-PWR terminal of the second module interface).

[0031] Functional circuits are circuits used to implement the personalized functions of functional expansion modules, such as the temperature detection circuit in the temperature probe module, the disinfection circuit in the ultraviolet disinfection module, and the purification circuit in the negative ion purification module. Specific circuits are not shown in this utility model.

[0032] from Figure 1 As can be seen, the identification code port of the second module interface is connected to the first end of the second resistor, and the positive signal port of the second module interface is connected to the second end of the second resistor; the positive power supply port of the second module interface is connected to the first end of the functional circuit, and the ground port of the second module interface is connected to the second end of the functional circuit. The identification code port of the first module interface is connected to the identification code port of the second module interface and the first end of the first resistor, respectively. The second end of the first resistor is connected to the voltage acquisition terminal of the processor. The positive signal port of the first module interface is connected to the positive signal port of the second module interface and the first power supply, respectively. The positive power supply port of the first module interface is connected to the positive power supply port of the second module interface, respectively. The ground port of the first module interface is connected to the ground port of the second module interface and the ground signal, respectively. The second power supply is connected to the source of the first field-effect transistor, the drain of the first field-effect transistor is connected to the positive power supply port of the first module interface, and the gate of the first field-effect transistor is connected to the first control port of the processor.

[0033] Specifically, the signal flow direction (i.e., signal transmission direction) in the signal detection loop is as follows: first power supply, positive signal port of the first module interface, positive signal port of the second module interface, second end of the second resistor, first end of the second resistor, identification code port of the second module interface, identification code port of the first module interface, first end of the first resistor, second end of the first resistor, and voltage acquisition terminal of the processor.

[0034] After the functional expansion module is inserted into the first module interface (i.e., the first module interface and the second module interface are connected), the signal detection circuit will be turned on immediately. The pull-up resistor inside the processor will be connected to the power supply of the processor's input / output port, forming a new voltage divider circuit with the first resistor. The voltage value at the voltage acquisition terminal will change. The processor reads the voltage divider value through the voltage acquisition terminal, and then calculates the resistance value of the second resistor of the functional expansion module to determine the type of the functional expansion module and whether the functional expansion module is in a normal state.

[0035] Optionally, the processor is specifically configured to: when the module type of the functional expansion module meets the power supply conditions, control the first control port to send a low-level signal to the gate of the first field-effect transistor to turn on the first field-effect transistor; when the module type of the functional expansion module does not meet the power supply conditions, control the first control port to send a high-level signal to the gate of the first field-effect transistor to turn off the first field-effect transistor.

[0036] The power supply circuit only operates when the first MOSFET is turned on; that is, it provides power to the functional expansion module when the gate of the first MOSFET receives a low-level signal. At this time, the signal flow in the power supply circuit is as follows: second power supply, source of the first MOSFET, drain of the first MOSFET, positive power supply port of the first module interface, positive power supply port of the second module interface, first terminal of the functional circuit, second terminal of the functional circuit, ground power supply port of the second module interface, ground power supply port of the first module interface, and ground signal. The voltage of the second power supply can be 5 volts. When the first MOSFET is turned on, power is supplied to the functional expansion module through the second power supply. When the gate of the first MOSFET receives a high-level signal (i.e., the first MOSFET is turned off), the power supply device of the oven functional expansion module does not supply power to the functional expansion module.

[0037] Optionally, the processor is specifically used to: determine the resistance value of the second resistor based on the sampled voltage value obtained from the voltage acquisition terminal, the resistance value of the first resistor, and the voltage value of the first power supply; and determine the module type of the functional expansion module based on the resistance value of the second resistor, the correspondence between the resistance value and the functional module.

[0038] The resistance value of the first resistor, the voltage value of the first power supply, and the voltage value of the second power supply are fixed. For example, the resistance value of the first resistor can be 10K ohms, the voltage value of the first power supply can be 3.3 volts, and the voltage value of the second power supply can be 5 volts. The specific parameter values ​​are related to the type of oven and the design logic, and this utility model does not limit them.

[0039] Optionally, the resistance value of the second resistor can be determined as follows: Vr = V1 × R1 / (R1 + R2); where Vr represents the sampling voltage value, V1 represents the voltage value of the first power supply, R1 represents the resistance value of the first resistor, and R2 represents the resistance value of the second resistor.

[0040] In one specific implementation, the resistance of the food probe module is 1K ohm, the resistance of the negative ion purification module is 10K ohm, and the resistance of the ultraviolet disinfection module is 20K ohm. The type of functional expansion module can be determined based on the resistance value of the second resistor.

[0041] It is worth noting that the processor employs different handling measures for different types of functional expansion modules. Specifically, the processor maintains a power-off state (i.e., keeps the current state of not supplying power to the functional expansion module) when the resistance value determines that the functional expansion module is not a food probe module, negative ion purification module, or ultraviolet disinfection module; when the resistance value determines that the functional expansion module is a food probe module, it sends a low-level signal to the gate of the first field-effect transistor to enable the power supply circuit to supply power to the functional expansion module; when the resistance value determines that the functional expansion module is a negative ion purification module or an ultraviolet disinfection module, it detects whether the oven door is closed. If the oven door is closed, it sends a low-level signal to the gate of the first field-effect transistor to enable the power supply circuit to supply power to the functional expansion module; if the oven door is not closed, the control information interface displays a door-closing prompt to remind the user to close the oven door.

[0042] Furthermore, the processor will also monitor the type and status of the functional expansion module in real time. If the functional expansion module does not meet the power supply conditions, it will immediately send a high-level signal to the gate of the first field-effect transistor to stop supplying power to the functional expansion module. If the processor detects that the oven's baking task has ended, it will also send a high-level signal to the gate of the first field-effect transistor to terminate unnecessary power supply tasks, reduce the oven's energy consumption, and save power resources.

[0043] The power supply device of the oven function expansion module of this utility model can also be configured with an overcurrent protection module and an overtemperature protection module. Both the overcurrent protection module and the overtemperature protection module are connected to the processor. When the processor receives an overcurrent signal sent by the overcurrent protection module and / or an overtemperature signal sent by the overtemperature protection module, it will send a high-level signal to the gate of the first field-effect transistor to stop supplying power to the function expansion module, thereby ensuring the safety of the oven and the function expansion module.

[0044] The power supply device of the oven function expansion module in the above embodiment determines the status and type of the external function module through a signal detection circuit, and judges whether the current status of the external function module is suitable for power supply. When the current status of the external function module is suitable for power supply, power is provided to the function expansion module through a power supply circuit. Power is only provided to external function modules that are suitable for power supply, ensuring the safety of the external function module and the oven. Secondly, the first module interface of the power supply device of the oven function expansion module of this utility model is a universal interface, which can insert various types of function modules such as temperature probes, ultraviolet disinfection modules and negative ion purification modules, to achieve true plug-and-play function expansion. It does not require setting a dedicated interface for each function module, nor does it require configuring an additional power supply. The interface has high utilization and strong adaptability, which can effectively reduce the design cost and function expansion cost of the oven. This solution addresses the issue that when a temperature probe is inserted into the food probe interface, the oven directly powers the temperature probe, which could directly affect the oven's operational safety if the temperature probe malfunctions or is improperly connected. It also solves the problem that the food probe interface is limited to temperature probes and cannot be used to connect functional modules such as UV sterilization and negative ion purification. If users need to use these functions externally, dedicated power supply components are required, resulting in low utilization of the functional interfaces and high costs for expanding the oven's functionality.

[0045] This utility model also provides an oven that can provide power to functional modules that meet the power supply conditions in a low-cost and precise manner, thereby improving the user's oven experience. The oven includes: an oven shell and a power supply device for any of the oven function expansion modules described in the above embodiments. Figure 2 This is a schematic diagram of an oven shell provided by this utility model. The power supply equipment for the oven function expansion module is deployed inside the oven shell. The purpose of this arrangement is to protect the power supply equipment of the oven function expansion module with the oven shell, thereby maximizing the stability and service life of the power supply equipment while ensuring the effectiveness of the function expansion module. The oven function expansion module is located inside... Figure 2 It was not shown in the text.

[0046] The oven in the above embodiments includes a power supply device for any one of the oven function expansion modules in the above embodiments. This oven not only determines the status and type of the external function module and judges whether the current status of the external function module is suitable for power supply, but also provides power only to suitable external function modules, ensuring the safety of the external function module and the oven. It also provides a universal interface that can be plugged into various types of function modules, resulting in high interface utilization and strong adaptability, effectively reducing the design cost and function expansion cost of the oven. This solves the problem that after the temperature probe is inserted into the food probe interface, the oven directly supplies power to the temperature probe, and if the temperature probe malfunctions or has an abnormal connection, it will directly affect the oven's operational safety. It also solves the problem that the food probe interface is limited to inserting temperature probes and cannot be used to connect function modules such as ultraviolet disinfection and negative ion purification. If users need to use ultraviolet disinfection and negative ion purification functions as external function modules, dedicated power supply components are required for the ultraviolet disinfection and negative ion purification modules, resulting in low utilization of the function interface and high oven function expansion costs. Furthermore, the oven provided in this embodiment includes the power supply device for the oven function expansion module in the above embodiments, possessing the corresponding beneficial effects of the power supply device for the oven function expansion module.

[0047] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0048] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power supply device for an oven function expansion module, characterized in that, include: The system includes a processor, a first resistor, a first module interface, a first power supply, and a power supply module; wherein the first module interface is connected to the oven's functional expansion module, the first resistor, the first power supply, and the power supply module, and the processor is connected to the first resistor and the power supply module. The processor, the first resistor, the first module interface, the first power supply, and the functional expansion module constitute a signal detection loop for determining the module type of the functional expansion module. The power supply module, the first module interface, and the function expansion module constitute a power supply circuit, which is used to provide power to the function expansion module when the processor determines that the module type of the function expansion module meets the power supply conditions.

2. The power supply equipment according to claim 1, characterized in that, The functional expansion module includes a second module interface, a second resistor, and a functional circuit; wherein, the second module interface includes an identification code port, a signal positive port, a power supply positive port, and a power supply ground port; The identification code port of the second module interface is connected to the first end of the second resistor, and the signal positive port of the second module interface is connected to the second end of the second resistor; the power supply positive port of the second module interface is connected to the first end of the functional circuit, and the power supply ground port of the second module interface is connected to the second end of the functional circuit.

3. The power supply equipment according to claim 2, characterized in that, The first module interface includes an identification code port, a signal positive port, a power supply positive port, and a power supply ground port; Specifically, the identification code port of the first module interface is connected to the identification code port of the second module interface and the first end of the first resistor, the second end of the first resistor is connected to the voltage acquisition terminal of the processor, the positive signal port of the first module interface is connected to the positive signal port of the second module interface and the first power supply, the positive power supply port of the first module interface is connected to the positive power supply port of the second module interface, and the ground port of the first module interface is connected to the ground port of the second module interface and the ground signal.

4. The power supply equipment according to claim 3, characterized in that, The power supply module includes a second power supply and a first field-effect transistor; The second power supply is connected to the source of the first field-effect transistor, the drain of the first field-effect transistor is connected to the positive power supply port of the first module interface, and the gate of the first field-effect transistor is connected to the first control port of the processor.

5. The power supply equipment according to claim 4, characterized in that, The signal flow in the signal detection loop is sequentially as follows: the first power supply, the positive signal port of the first module interface, the positive signal port of the second module interface, the second end of the second resistor, the first end of the second resistor, the identification code port of the second module interface, the identification code port of the first module interface, the first end of the first resistor, the second end of the first resistor, and the voltage acquisition terminal of the processor.

6. The power supply equipment according to claim 5, characterized in that, The processor is specifically used for: The resistance value of the second resistor is determined based on the sampled voltage value obtained from the voltage acquisition terminal, the resistance value of the first resistor, and the voltage value of the first power supply. Based on the resistance value of the second resistor and the correspondence between the resistance value and the functional module, the module type of the functional expansion module is determined.

7. The power supply equipment according to claim 6, characterized in that, The resistance value of the second resistor is determined as follows: Vr = V1 × R1 / (R1 + R2); Wherein, Vr represents the sampled voltage value, V1 represents the voltage value of the first power supply, R1 represents the resistance value of the first resistor, and R2 represents the resistance value of the second resistor.

8. The power supply equipment according to claim 4, characterized in that, The processor is specifically used for: When the module type of the functional expansion module meets the power supply conditions, the first control port is controlled to send a low-level signal to the gate of the first field-effect transistor to turn on the first field-effect transistor. When the module type of the functional expansion module does not meet the power supply conditions, the first control port is controlled to send a high-level signal to the gate of the first field-effect transistor to turn off the first field-effect transistor.

9. The power supply equipment according to claim 4, characterized in that, The signal flow in the power supply circuit is as follows: the second power supply, the source of the first field-effect transistor, the drain of the first field-effect transistor, the positive power supply port of the first module interface, the positive power supply port of the second module interface, the first terminal of the functional circuit, the second terminal of the functional circuit, the ground power supply port of the second module interface, the ground power supply port of the first module interface, and the ground signal.

10. An oven, characterized in that, include: The oven housing and the power supply device for the oven function expansion module as described in any one of claims 1 to 9; The power supply for the oven function expansion module is located inside the oven housing.

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