Heating circuit of electric food warmer

Abstract

The utility model discloses a heating circuit of an electric food warmer, and belongs to the technical field of electric food warmers. A heating circuit of an electric food warmer comprises a master control switch S1, a temperature control module and a heating module, the master control switch S1, the temperature control module and the heating module are sequentially connected in series, the master control switch S1 is used for controlling on-off of the heating circuit, the temperature control module comprises a first temperature controller T1, a second temperature controller T2 and a change-over switch S2, and the sensing control temperature of the first temperature controller T1 is larger than that of the second temperature controller T2. The first temperature controller T1 is connected with the second temperature controller T2 in series, the change-over switch S2 is connected with the first temperature controller T1 in series and used for switching the on-off state of the first temperature controller T1 and the heating circuit, the heating module comprises a plurality of electric heating tubes, the plurality of electric heating tubes are all connected with the temperature control module in series, and any electric heating tube is connected with a control switch in series; a user can control the on-off state of the change-over switch S2 according to the heating requirement, and switching between the stir-frying function and the heating function is achieved.

Description

Technical Field

[0001] This application relates to the field of electric heating pot technology, and more specifically, to a heating circuit for an electric heating pot. Background Technology

[0002] With the fast pace of life, the demand for kitchen appliances is increasing. Electric hot pots, as a common kitchen appliance, are widely popular due to their ease of operation, safety, and versatility. Electric hot pots are mainly used for cooking, such as noodles, porridge, and soup, but can also be used for frying, stir-frying, steaming, and other cooking methods, making them a multi-functional kitchen appliance.

[0003] A search revealed that Chinese patent CN109875385A provides a multi-functional electric heating cooking method and electric hot pot suitable for stir-frying and pancake making in high-altitude areas. This device allows for the adjustment of the heating elements (three or more) by adjusting the pancake temperature control lever, thus meeting the different heat requirements of various dishes and cooking stages. This solves the problems of insufficient heat for undercooked food in high-altitude conditions and excessive heat leading to excessive loss of moisture and flavor. The heat preservation and temperature control function also addresses the issue of food cooling down easily in high-altitude environments. The pancake temperature control function further caters to various flavors of pancakes suitable for high-altitude conditions. Therefore, this provides a truly suitable multi-functional electric hot pot for high-altitude areas, accelerating the modernization of high-altitude cooking equipment and energy structures.

[0004] In the above-mentioned device, the heat preservation controller is connected in series with only one heating element, which results in a fixed heating efficiency of the heat preservation function of the device that cannot be adjusted. In view of this, we propose a heating circuit for an electric hot pot. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this application is to provide a heating circuit for an electric hot pot to solve the problems mentioned in the background art.

[0007] 2. Technical Solution

[0008] This application is achieved through the following technical solution:

[0009] A heating circuit for an electric hot pot includes a master control switch S1, a temperature control module, and a heating module. The master control switch S1, the temperature control module, and the heating module are connected in series. The master control switch S1 is used to control the on / off state of the heating circuit. The temperature control module includes a first temperature controller T1, a second temperature controller T2, and a switching switch S2. The sensing temperature of the first temperature controller T1 is greater than the sensing temperature of the second temperature controller T2. The first temperature controller T1 and the second temperature controller T2 are connected in series. The switching switch S2 is connected in series with the first temperature controller T1 and is used to switch the on / off state of the first temperature controller T1 and the heating circuit. The heating module includes multiple heating elements, each of which is connected in series with the temperature control module. Each heating element is connected in series with a control switch.

[0010] As an optional solution to the technical solution of this application, it also includes a thermal fuse F, which is connected in series in the heating circuit.

[0011] As an optional solution to the technical solution of this application, the electric heating tube is provided in three parts, namely electric heating tube R1, electric heating tube R2 and electric heating tube R3.

[0012] As an optional solution to the technical solution of this application, the control switch is connected in series between the heating element and the temperature control module, and at least one of the control switches is connected in parallel with a diode D. The diode D is connected in series with an adjustment switch S4, and the adjustment switch S4 is used to control the on / off state of the diode D and the heating circuit.

[0013] As an optional solution to the technical solution in this application, the power of heating element R1 and heating element R3 is 800W, and the power of heating element R2 is 500W.

[0014] As an optional solution to the technical solution of this application, the main control switch S1, the switching switch S2 and the control switch are all illuminated switches.

[0015] As an optional solution to the technical solution in this application, the sensing temperature of the first temperature controller T1 is not lower than 300 degrees Celsius, and the temperature of the second temperature controller T2 is not higher than 300 degrees Celsius.

[0016] As an optional solution to the technical solution in this application, the temperature sensed by the first temperature controller T1 is 300-350 degrees Celsius.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] 1) By setting a first thermostat T1, a second thermostat T2 and a switching switch S2, the user can control the opening and closing state of the switching switch S2 according to the heating needs, so as to switch between the stir-fry function and the heating function.

[0020] 2) This application connects the temperature control module and the heating module in series, so that users can select heating tubes with different power not only in the stir-fry function, but also in the heating function.

[0021] 3) By setting up a diode D and adjusting the state of the diode D connected to the circuit by adjusting the switch S4, this application can reduce the heating efficiency and achieve the heat preservation function without increasing the number of heating tubes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the heating circuit of an electric hot pot. Detailed Implementation

[0023] The technical solution of this application will now be clearly and completely described in conjunction with the accompanying drawings.

[0024] Please see Figure 1 This application provides a technical solution:

[0025] A heating circuit for an electric hot pot includes a master control switch S1, a temperature control module, and a heating module. The master control switch S1, the temperature control module, and the heating module are connected in series. The master control switch S1 is used to control the on / off state of the heating circuit. The temperature control module includes a first temperature controller T1, a second temperature controller T2, and a switching switch S2. The sensing temperature of the first temperature controller T1 is greater than the sensing temperature of the second temperature controller T2. The first temperature controller T1 and the second temperature controller T2 are connected in series. The switching switch S2 is connected in series with the first temperature controller T1 and is used to switch the on / off state of the first temperature controller T1 and the heating circuit. The heating module includes multiple heating elements, each of which is connected in series with the temperature control module. Each heating element is connected in series with a control switch.

[0026] In this application, the user can control the circuit's on / off state via the main control switch S1. When stir-frying is required, the main control switch S1 is closed first, followed by the switching switch S2. Power current flows into the heating module through the first thermostat T1 and the second thermostat T2 respectively. The user can selectively connect the heating element to the circuit by controlling the opening and closing state of the control switch, allowing the current flowing from the temperature control module to flow into the power supply through the heating element. When the temperature of the electric pot does not exceed the sensing temperature of the first thermostat T1, the first thermostat T1 remains closed, allowing the heating element to continuously heat and maintain the pot's temperature at a high temperature. When the temperature of the electric pot exceeds the sensing temperature of the first thermostat T1, the first thermostat T1 will be open. Since the sensing temperature of the second thermostat T2 is lower than that of the first thermostat T1, the second thermostat T2 will also be open. At this time, power current cannot flow into the heating module through the temperature control module, thus controlling the temperature and preventing overheating and potential safety hazards.

[0027] When heating is required, the user only needs to disconnect the switch S2, so that the power current can only flow into the heating module through the second thermostat T2. When the temperature is higher than the sensing temperature of the second thermostat T2, the second thermostat T2 will be in the open state, the heating element will stop heating, and the electric pot temperature will be set to a low temperature. When the temperature of the electric pot is lower than the sensing temperature of the second thermostat T2, the second thermostat T2 will be in the closed state, the heating element will start heating, and the heat preservation function will be achieved.

[0028] Preferably, the sensing temperature of the first temperature controller T1 is not lower than 300 degrees Celsius, preferably 300-350 degrees Celsius, and the second temperature controller T2 does not exceed 300 degrees Celsius.

[0029] The above design allows users to achieve heating or stir-frying functions using different heating elements. By selecting heating elements with different power ratings, the heating efficiency can be adjusted to suit different usage needs.

[0030] Preferably, the heating circuit also includes a thermal fuse F, which is connected in series in the heating circuit. When a short circuit occurs in the heating circuit, the thermal fuse F can melt and play a protective role.

[0031] Preferably, a control switch is connected in series between the heating element and the temperature control module, and at least one control switch is connected in parallel with a diode D. A regulating switch S4 is connected in series with diode D, and the regulating switch S4 controls the on / off state of the diode D and the heating circuit. When the regulating switch S4 is closed and the control switch is open, diode D can be connected to the circuit. Since household power is AC, diode D can prevent reverse current from flowing into the heating element, thereby reducing heating efficiency and achieving the heat preservation function without introducing more heating elements.

[0032] Preferably, there are three heating elements: heating element R1, heating element R2, and heating element R3. Heating element R1 and heating element R3 have a power of 800W, and heating element R2 has a power of 500W. A control switch S3 is connected in series between heating element R2 and the temperature control module, a control switch S5 is connected in series between heating element R2 and the temperature control module, and a control switch S6 is connected in series between heating element R3 and the temperature control module. Diode D is connected in parallel with control switch S5.

[0033] The main control switch S1, the switching switch S2, the adjusting switch S4, the control switch S3, the control switch S5, and the control switch S6 are all illuminated switches used to indicate the open or closed state of the switches.

Claims

1. A heating circuit for an electric hot pot, characterized in that: The system includes a master control switch S1, a temperature control module, and a heating module, which are connected in series. The master control switch S1 controls the on / off state of the heating circuit. The temperature control module includes a first temperature controller T1, a second temperature controller T2, and a switching switch S2. The sensing temperature of the first temperature controller T1 is greater than that of the second temperature controller T2. The first temperature controller T1 and the second temperature controller T2 are connected in series. The switching switch S2 is connected in series with the first temperature controller T1 and is used to switch the on / off state of the first temperature controller T1 and the heating circuit. The heating module includes multiple heating elements, each of which is connected in series with the temperature control module. Each heating element is connected in series with a control switch.

2. The heating circuit of an electric hot pot according to claim 1, characterized in that: It also includes a thermal fuse F, which is connected in series in the heating circuit.

3. The heating circuit of an electric hot pot according to claim 1, characterized in that: There are three heating elements: heating element R1, heating element R2 and heating element R3.

4. The heating circuit of an electric hot pot according to claim 2, characterized in that: The control switch is connected in series between the heating element and the temperature control module. At least one of the control switches is connected in parallel with a diode D. The diode D is connected in series with an adjustment switch S4. The adjustment switch S4 is used to control the on / off state of the diode D and the heating circuit.

5. The heating circuit of an electric hot pot according to claim 3, characterized in that: The power of heating element R1 and heating element R3 is 800W, and the power of heating element R2 is 500W.

6. The heating circuit of an electric hot pot according to claim 1, characterized in that: The main control switch S1, the switching switch S2, and the control switch are all illuminated switches.

7. The heating circuit of an electric hot pot according to claim 1, characterized in that: The temperature sensing temperature of the first temperature controller T1 is not lower than 300 degrees Celsius, and the temperature sensing temperature of the second temperature controller T2 is not higher than 300 degrees Celsius.

8. The heating circuit of an electric hot pot according to claim 1, characterized in that: The temperature sensing temperature of the first temperature controller T1 is 300-350 degrees Celsius.

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