Heating control circuit and electric appliance

Abstract

The utility model discloses a heating control circuit and an electric appliance. The heating control circuit comprises a control module, a first switch module, a second switch module, a third switch module, a heating body RE 1 and a heating body RE2. The control module is connected with the other end of the power supply and used for detecting whether the input voltage is first voltage or second voltage, and the first voltage is smaller than the second voltage; the control module can control the heating body RE1 to be powered on through the first switch module, the second switch module and the third switch module when the first voltage is detected, or control the heating body RE1 and the heating body RE2 to be powered on simultaneously through the first switch module, the second switch module and the third switch module when the second voltage is detected. According to the circuit, the electric appliance can adapt to two voltage grades, the application range of the electric appliance is widened, and the use requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of electrical appliances, and in particular to a heating control circuit and electrical appliance. Background Technology

[0002] Many electrical appliances use heating elements for heating, such as water dispensers and kettles. However, these appliances have relatively limited operating voltages. Appliances with a working voltage of 220V can only be connected to 220V, and appliances with a working voltage of 100V can only be connected to 100V. Such appliances cannot meet the needs of use under different voltage conditions. Therefore, there is an urgent need for a heating control circuit and appliance to solve the above problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a heating control circuit and electrical appliance.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a heating control circuit, including a control module, a first switch module, a second switch module, a third switch module, a heating element RE1, and a heating element RE2;

[0005] The control terminal of the first switch module is connected to the control module, the first terminal is connected to one end of the power supply and one end of the heating element RE2, and the second terminal is connected to one end of the heating element RE1 and the first terminal of the third switch module.

[0006] The control terminal of the second switch module is connected to the control module, the first terminal is connected to the other end of the heating element RE1 and the other end of the heating element RE2 respectively, and the second terminal is connected to the other end of the power supply.

[0007] The control terminal of the third switch module is connected to the control module, and the second terminal is connected to the other end of the power supply.

[0008] The control module is connected to the other end of the power supply and is used to detect whether the input voltage is a first voltage or a second voltage, wherein the first voltage is less than the second voltage.

[0009] The control module can control the heating element RE1 to be energized through the first switch module, the second switch module and the third switch module when the first voltage is detected, or control the heating elements RE1 and RE2 to be energized simultaneously through the first switch module, the second switch module and the third switch module when the second voltage is detected.

[0010] In one preferred embodiment of this utility model, the first switching module includes a resistor R1, a transistor Q1, and a relay K1. The base of the transistor Q1 is connected to the control module via the resistor R1. The collector of the transistor Q1 is connected to one end of the coil of the relay K1. The emitter of the transistor Q1 is connected to the ground terminal. The other end of the coil of the relay K1 is connected to the power supply VCC. One end of the relay K1 contact is connected to one end of the power supply and one end of the heating element RE2. The other end of the relay K1 contact is connected to one end of the heating element RE1 and the first end of the third switching module.

[0011] In one preferred embodiment of this utility model, the second switching module includes a resistor R2, a transistor Q2, and a relay K2. The base of the transistor Q2 is connected to the control module via the resistor R2. The collector of the transistor Q2 is connected to one end of the coil of the relay K2. The emitter of the transistor Q2 is connected to the ground terminal. The other end of the coil of the relay K2 is connected to the power supply VCC. One end of the relay K2 contact is connected to the other end of the heating element RE1 and the other end of the heating element RE2, respectively. The other end of the relay K2 contact is connected to the other end of the power supply.

[0012] In one preferred embodiment of this utility model, the third switching module includes a resistor R3, a transistor Q3, and a relay K3. The base of the transistor Q3 is connected to the control module via the resistor R3. The collector of the transistor Q3 is connected to one end of the coil of the relay K3. The emitter of the transistor Q3 is connected to the ground terminal. The other end of the coil of the relay K3 is connected to the power supply VCC. One end of the relay K3 contact is connected to the second terminal of the first switching module and one end of the heating element RE1, respectively. The other end of the relay K3 contact is connected to the other end of the power supply.

[0013] In one of the preferred embodiments of this utility model, the first voltage is 100V and the second voltage is 220V.

[0014] An electrical appliance, including the aforementioned heating control circuit.

[0015] The beneficial effects of this utility model are as follows: A heating control circuit and an electrical appliance are provided. The heating control circuit includes a control module, a first switch module, a second switch module, a third switch module, a heating element RE1, and a heating element RE2. The control module is connected to the other end of the power supply and is used to detect whether the input voltage is a first voltage or a second voltage, wherein the first voltage is less than the second voltage. When the first voltage is detected, the control module can control the heating element RE1 to be energized through the first switch module, the second switch module, and the third switch module, or when the second voltage is detected, it can control the heating elements RE1 and RE2 to be energized simultaneously through the first switch module, the second switch module, and the third switch module. Through the above circuit, the electrical appliance can be adapted to two voltage levels, thereby improving the applicability of the electrical appliance and meeting usage requirements. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a circuit diagram of a heating control circuit. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figure 1 This utility model provides a heating control circuit, including a control module 10, a first switch module 20, a second switch module 30, a third switch module 40, a heating element RE1, and a heating element RE2;

[0023] The control terminal of the first switch module 20 is connected to the control module 10, the first terminal is connected to one end of the power supply and one end of the heating element RE2, and the second terminal is connected to one end of the heating element RE1 and the first terminal of the third switch module 40.

[0024] The control terminal of the second switch module 30 is connected to the control module 10, the first terminal is connected to the other end of the heating element RE1 and the other end of the heating element RE2 respectively, and the second terminal is connected to the other end of the power supply.

[0025] The control terminal of the third switch module 40 is connected to the control module 10, and the second terminal is connected to the other end of the power supply.

[0026] The control module 10 is connected to the other end of the power supply and is used to detect whether the input voltage is a first voltage or a second voltage, wherein the first voltage is less than the second voltage.

[0027] When a first voltage is detected, the control module 10 can control the heating element RE1 to be energized through the first switch module 20, the second switch module 30 and the third switch module 40, or when a second voltage is detected, control the heating elements RE1 and RE2 to be energized simultaneously through the first switch module 20, the second switch module 30 and the third switch module 40.

[0028] The working principle of this utility model is as follows: In some embodiments, the first voltage is 100V and the second voltage is 220V; 1) The control module 10 detects the input voltage of the power supply. When the control module 10 detects that the power supply is 100V, it will control the path between one end of the power supply and one end of the heating element RE1 through the first switch module 20, control the path between the other end of the power supply and the other end of the heating element RE1 and the other end of the heating element RE2 through the second switch module 30, and control the path between the other end of the power supply and one end of the heating element RE1 through the third switch module 40, so that energy circulates through one end of the power supply, the first switch module 20, the heating element RE1, the second switch module 30, and the other end of the power supply, thereby energizing the heating element RE1; 2) When the control module 10 detects that the power supply is 220V, it will The first switch module 20 controls the path between one end of the power supply and one end of the heating element RE1 to be cut off, the second switch module 30 controls the path between the other end of the power supply and the other ends of the heating elements RE1 and RE2 to be cut off, and the third switch module 40 controls the path between the other end of the power supply and one end of the heating element RE1 to be open, so that energy is circulated through one end of the power supply, the heating element RE1, the heating element RE2, the third switch module 40, and the other end of the power supply, thereby enabling the heating elements RE1 and RE2 to be powered and working simultaneously. It should be noted that the control module 10 is preferably set as an MCU. After the voltage of the power supply is input, it is rectified by the rectifier circuit and input to the MCU (IN terminal). The MCU judges the input voltage of the power supply. This is the prior art and will not be described in detail here, nor should it be considered as a limitation of this utility model.

[0029] Reference Figure 1In a preferred embodiment of the first switch module 20, the first switch module 20 includes a resistor R1, a transistor Q1, and a relay K1. The base of transistor Q1 is connected to the control module 10 via resistor R1. The collector of transistor Q1 is connected to one end of the coil of relay K1. The emitter of transistor Q1 is connected to ground. The other end of the coil of relay K1 is connected to the power supply VCC. One end of the relay K1 contact is connected to one end of the power supply and one end of the heating element RE2. The other end of the relay K1 contact is connected to one end of the heating element RE1 and one end of the third switch module 40. In a preferred embodiment of the second switch module 30, the second switch module 30 includes a resistor R2, a transistor Q2, and a relay K2. The base of transistor Q2 is connected to the control module 10 via resistor R2. The collector of transistor Q2 is connected to one end of the coil of relay K2. The transistor Q2 emitter is connected to the ground terminal, the other end of the relay K2 coil is connected to the power supply VCC, one end of the relay K2 contact is connected to the other end of the heating element RE1 and the other end of the heating element RE2, and the other end of the relay K2 contact is connected to the other end of the power supply; as a preferred embodiment of the third switch module 40, the third switch module 40 includes a resistor R3, a transistor Q3 and a relay K3, the base of the transistor Q3 is connected to the control module 10 through the resistor R3, the collector of the transistor Q3 is connected to one end of the relay K3 coil, the emitter of the transistor Q3 is connected to the ground terminal, the other end of the relay K3 coil is connected to the power supply VCC, one end of the relay K3 contact is connected to the second terminal of the first switch module 20 and one end of the heating element RE1, and the other end of the relay K3 contact is connected to the other end of the power supply.

[0030] Specifically: 1) When the control module 10 detects that the power supply is 100V, the control module 10 outputs a high level to transistors Q1 and Q2, turning them on. This energizes the coils of relays K1 and K2, closing the contacts of relays K1 and K2. This connects one end of the power supply to one end of the heating element RE1, and also connects the other end of the power supply to the other ends of the heating elements RE1 and RE2. Meanwhile, the control module 10 outputs a low level to transistor Q3, turning it off. This de-energizes the coil of relay K3, opening its contacts and cutting off the path between the other end of the power supply and one end of the heating element RE1, ultimately energizing and operating the heating element RE1; 2) When the control module 10 detects that the power supply is 220V, the control module 10 outputs a low level to transistors Q1 and Q2, causing transistors Q1 and Q2 to be cut off. The coils of relays K1 and K2 are de-energized, and the contacts of relays K1 and K2 open. This cuts off the path between one end of the power supply and one end of the heating element RE1, as well as the path between the other end of the power supply and the other ends of heating elements RE1 and RE2. Meanwhile, the control module 10 outputs a high level to transistor Q3, causing transistor Q3 to conduct. The coil of relay K3 is energized, and the contacts of relay K3 close, thus connecting the other end of the power supply to one end of the heating element RE1. Ultimately, this allows heating elements RE1 and RE2 to be energized and operate simultaneously.

[0031] This utility model also provides an electrical appliance, including the aforementioned heating control circuit.

[0032] The advantage of this invention is that the circuit described above enables the appliance to be compatible with two voltage levels, thereby increasing the applicability of the appliance and meeting usage requirements.

[0033] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A heating control circuit, characterized in that: It includes a control module (10), a first switch module (20), a second switch module (30), a third switch module (40), a heating element RE1, and a heating element RE2; The control terminal of the first switch module (20) is connected to the control module (10), the first terminal is connected to one end of the power supply and one end of the heating element RE2, and the second terminal is connected to one end of the heating element RE1 and the first terminal of the third switch module (40). The control terminal of the second switch module (30) is connected to the control module (10), the first terminal is connected to the other end of the heating element RE1 and the other end of the heating element RE2 respectively, and the second terminal is connected to the other end of the power supply; The control terminal of the third switch module (40) is connected to the control module (10), and the second terminal is connected to the other end of the power supply. The control module (10) is connected to the other end of the power supply and is used to detect whether the input voltage is a first voltage or a second voltage, wherein the first voltage is less than the second voltage. The control module (10) can control the heating element RE1 to be energized through the first switch module (20), the second switch module (30) and the third switch module (40) when the first voltage is detected, or control the heating elements RE1 and RE2 to be energized simultaneously through the first switch module (20), the second switch module (30) and the third switch module (40) when the second voltage is detected.

2. The heating control circuit according to claim 1, characterized in that: The first switch module (20) includes a resistor R1, a transistor Q1 and a relay K1. The base of the transistor Q1 is connected to the control module (10) via the resistor R1. The collector of the transistor Q1 is connected to one end of the coil of the relay K1. The emitter of the transistor Q1 is connected to the ground terminal. The other end of the coil of the relay K1 is connected to the power supply VCC. One end of the relay K1 contact is connected to one end of the power supply and one end of the heating element RE2. The other end of the relay K1 contact is connected to one end of the heating element RE1 and the first end of the third switch module (40).

3. The heating control circuit according to claim 1, characterized in that: The second switching module (30) includes a resistor R2, a transistor Q2 and a relay K2. The base of the transistor Q2 is connected to the control module (10) via the resistor R2. The collector of the transistor Q2 is connected to one end of the coil of the relay K2. The emitter of the transistor Q2 is connected to the ground terminal. The other end of the coil of the relay K2 is connected to the power supply VCC. One end of the relay K2 contact is connected to the other end of the heating element RE1 and the other end of the heating element RE2 respectively. The other end of the relay K2 contact is connected to the other end of the power supply.

4. A heating control circuit according to claim 1, characterized in that: The third switch module (40) includes a resistor R3, a transistor Q3 and a relay K3. The base of the transistor Q3 is connected to the control module (10) via the resistor R3. The collector of the transistor Q3 is connected to one end of the coil of the relay K3. The emitter of the transistor Q3 is connected to the ground terminal. The other end of the coil of the relay K3 is connected to the power supply VCC. One end of the relay K3 contact is connected to the second terminal of the first switch module (20) and one end of the heating element RE1, respectively. The other end of the relay K3 contact is connected to the other end of the power supply.

5. A heating control circuit according to claim 1, characterized in that: The first voltage is 100V, and the second voltage is 220V.

6. An electrical appliance, characterized in that: Includes the heating control circuit as described in any one of claims 1-5.

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