CN213757759U

CN213757759U - Three-temperature control switch circuit and electric kettle

Info

Publication number: CN213757759U
Application number: CN202022290319.6U
Authority: CN
Inventors: 庞亮; 赵云鹏; 吴振强; 李征; 赵泓伉
Original assignee: Shen Kan Qinhuangdao General Engineering Design and Research Institute Corp of MCC
Current assignee: Shen Kan Qinhuangdao General Engineering Design and Research Institute Corp of MCC
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-07-23
Anticipated expiration: 2030-10-15

Abstract

The embodiment of the utility model provides a three temperature control switch circuit and electric kettle, the circuit includes first switch circuit, second switch circuit and heater, first switch circuit with after the second switch circuit connects in parallel with the heater concatenate in alternating current power supply; the first switch circuit comprises a first control switch, and the second switch circuit comprises a second control switch, a third control switch and a power regulation module which are sequentially connected in series. Through the mode that adopts first switch circuit and second switch circuit's mutual switching, the heating element can realize the heating and the heat preservation of two kinds of different powers, not only can make electric kettle can select different working methods when the primary water of heating and reheating, and the repetition of avoiding reheating when reheating is boiled, only needs a heating tube moreover, and the cost is lower, has practiced thrift the consumption simultaneously, is fit for promoting in a large number.

Description

Three-temperature control switch circuit and electric kettle

Technical Field

The utility model relates to a small household appliances technical field particularly, relates to a three temperature detect switch circuit and electric kettle.

Background

The low-power electric kettle is taken as a popular small household appliance, and in the prior art, the heat preservation modes mainly comprise two modes: one is to use the double-heating tube, there are two pieces of material, structure identical or similar on the heating plate of the electric kettle, but the heating tube with different powers, one is heated and boiled water, another one plays the role of heat preservation, this kind of structural disadvantage lies in the power of heat preservation is too big, the heat preservation heating tube processes the difficulty greatly, the craft is complicated, the cost is high; the other type uses a heating pipe and PTC combination to preserve heat, the heating pipe is used for heating the boiled water, and the PTC is used for preserving heat. The PTC structure must be arranged on the heating plate, so that the appearance volume of the kettle is increased, the requirement of a customer on the appearance of the product cannot be met, and the production cost is high.

The Chinese patent No. ZL200720050194.1 discloses a heat-preservation electric kettle, which comprises a kettle cover, a kettle body, a kettle mouth, a heating chassis and a base, wherein a heat-preservation sheet is arranged in the heat-preservation electric kettle, a control panel is arranged on the surface of the kettle body, a heating switch and a heat-preservation switch are arranged on the control panel, the heating switch is electrically connected with the heating chassis, and the heat-preservation switch is electrically connected with the heat-preservation sheet. The electric kettle with the structure adopts two heating elements of the heating chassis and the heat preservation sheet for heating, greatly improves the production cost, and has complex structure and large volume.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present invention provides a three-temperature switch circuit and an electric kettle, which can select different working modes when the electric kettle is heated for the first time and is heated again by using the thermal insulation switch circuit, thereby avoiding repeated heating when the electric kettle is heated again, and only one heating tube is needed.

In a first aspect, an embodiment of the present invention provides a three-temperature switch circuit, which is applied to an electric kettle, and the three-temperature switch circuit is connected to an ac power supply, and includes a first switch circuit, a second switch circuit and a heater, where the first switch circuit is connected in parallel with the second switch circuit and then connected in series with the heater to the ac power supply; the first switch circuit comprises a first control switch comprising a first control terminal, a first input terminal and a first output terminal, the first control terminal being configured to receive a first control signal and control conduction between the first input terminal and the first output terminal, and to receive a second control signal and control disconnection between the first input terminal and the first output terminal; the second switch circuit comprises a second control switch, a third control switch and a power regulation module which are sequentially connected in series, the second control switch comprises a second control end, a second input end and a second output end, the second control end is configured to receive the first control signal and control the second input end and the second output end to be disconnected, and the second control signal and control the second input end and the second output end to be electrically connected; the third control switch includes a third control terminal, a third input terminal and a third output terminal, the third input terminal is electrically connected to the second output terminal, and the third control terminal is configured to receive a third control signal and control conduction between the third input terminal and the third output terminal.

In combination with the first aspect, the present invention further provides a first possible implementation manner of the first aspect, where the first possible implementation manner further includes a first temperature sensor, a second temperature sensor, and a third temperature sensor, which are connected in series, where the first temperature sensor is configured to collect temperature and send the first control signal, the second temperature sensor is configured to collect temperature and send the second control signal, and the third temperature sensor is configured to collect temperature and send the third control signal.

In combination with the first aspect, the embodiment of the present invention further provides a second possible implementation manner of the first aspect, wherein the second possible implementation manner further includes a controller, and a rectifier circuit, a key switch, a first temperature sensor, a second temperature sensor, and a third temperature sensor, which are electrically connected to the controller, respectively, the rectifier circuit is further connected to the ac power supply, the controller is configured to issue the first control signal according to the temperature collected by the first temperature sensor or the signal of the key switch, issue the second control signal according to the temperature collected by the second temperature sensor, and issue the third control signal according to the temperature collected by the third temperature sensor.

In combination with the first or second aspect, embodiments of the present invention further provide a third possible implementation manner of the first or second aspect, wherein the power conditioning module is a unidirectional conducting device, and the unidirectional conducting device is a diode.

With reference to the first or second aspect, embodiments of the present invention further provide a fourth possible implementation manner of the first or second aspect, wherein the power conditioning module is a PCB board.

With reference to the first or second aspect, embodiments of the present invention further provide a fifth possible implementation manner of the first or second aspect, and the power adjusting module is a resistor.

In combination with the first aspect, an embodiment of the present invention further provides a sixth possible implementation manner of the first aspect, where the power of the first switch circuit further includes a first indicator light, and the second switch circuit further includes a second indicator light.

In combination with the first aspect, the embodiment of the present invention further provides a seventh possible implementation manner of the first aspect, wherein the three temperature control switch circuits further include a dry-fire protection temperature controller and a power switch, and the dry-fire protection temperature controller and the power switch are all connected in series with the first switch circuit and the second switch circuit.

With reference to the first aspect, embodiments of the present invention further provide an eighth possible implementation manner of the first aspect, wherein the heat generator includes a resonant heating component and/or a resistive heating component.

In a second aspect, an embodiment of the present invention provides an electric kettle, which includes the three temperature control switch circuits of any one of the above embodiments.

Compared with the prior art, the utility model discloses a following beneficial effect has:

the utility model provides a three temperature control switch circuit, the circuit includes first switch circuit, second switch circuit and heater, first switch circuit with after the second switch circuit connects in parallel with the heater concatenate in alternating current power supply; the first switch circuit comprises a first control switch, and the second switch circuit comprises a second control switch, a third control switch and a power regulation module which are sequentially connected in series. Through the mode that adopts first switch circuit and second switch circuit's mutual switching, the heating element can realize the heating and the heat preservation of two kinds of different powers, not only can make electric kettle can select different working methods when the primary water of heating and reheating, and the repetition of avoiding reheating when reheating is boiled, only needs a heating tube moreover, and the cost is lower, has practiced thrift the consumption simultaneously, is fit for promoting in a large number.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic circuit diagram of a three-temperature switch circuit according to an embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of a first switch circuit and a second switch circuit according to an embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a three-temperature control switch circuit provided in the second embodiment of the present invention.

Fig. 4 is a circuit block of a part of a three-temperature switch circuit provided in an embodiment of the present invention.

Fig. 5 is a schematic circuit diagram of a first switch circuit and a second switch circuit according to a second embodiment of the present invention.

Icon:

a first switching circuit-11; a second switching circuit 12; a heater-13; a first temperature sensor-14; a second temperature sensor-15; a third temperature sensor-16; a control circuit 17; a controller U1; a power switch-18; dry-fire protection thermostat-19; a rectifier circuit-20; a key switch-21; diode-D1; PCB board-22; a first control switch-110; a first control terminal-111; a first input-112; a first output terminal-113; a first indicator light-L1; a second control switch-120; a second control terminal-121; a second input terminal-122; a second output terminal-123; a second indicator light-L2; a third control switch-130; a third control terminal-131; a third input-132; a third output terminal-133.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Example one

The utility model provides a three temperature control switch circuit and electric kettle not only can make electric kettle select different working method when the primary water of heating and reheating through adopting three temperature control switch circuit, and the repetition of avoiding reheating when opens, only needs a heating tube moreover, and these three temperature control switch circuit set up in electric kettle's circuit board for control electric kettle's heating and heat preservation.

Fig. 1 is a schematic circuit diagram of a three-temperature switch circuit according to an embodiment of the present invention. The three temperature control switch circuits are connected to an alternating current power supply AC, and each of the three temperature control switch circuits includes a first switch circuit 11, a second switch circuit 12, a heater 13, a first temperature sensor 14, a second temperature sensor 15, and a third temperature sensor 16. The first switch circuit 11 and the second switch circuit 12 are connected in parallel and then connected in series with the heater 13 to the AC power supply AC, and meanwhile, the first switch circuit 11 and the second switch circuit 12 are also connected in series with the first temperature sensor 14, the second temperature sensor 15 and the third temperature sensor 16.

The first switch circuit 11 and the second switch circuit 12 are respectively used for receiving the temperature signals collected by the first temperature sensor 14, the second temperature sensor 15 and the third temperature sensor 16 for heating and heat preservation. The heater 13 is used for heating or keeping warm when the first switch circuit 11 and the second switch circuit 12 are turned on, and the heater 13 may be a resonant heating element and/or a resistive heating element.

The three temperature control switch circuit also comprises a resistor R, a power switch 18 and a dry-burning protection temperature controller 19. The power switch 18 is used for controlling the on-off of the power supply of the whole electric kettle, and the dry-burning protection temperature controller 19 is used for preventing the electric kettle from entering a dry-burning state, so that the safety of the electric kettle is improved, and the use experience of a user is improved.

Specifically, when the dry-burning protection temperature controller 19 detects that no liquid exists in the electric kettle but is still in a heating state, the dry-burning protection temperature controller 19 is switched off to stop heating, so that the possibility of danger such as electrical fire and the like is reduced, and the personal safety and the property safety of a user are protected.

Referring to fig. 2, a circuit diagram of a first switch circuit 11 and a second switch circuit 12 according to a first embodiment of the present invention is provided. Since fig. 1 only shows a block diagram of the first switch circuit 11 and the second switch circuit 12 connected in parallel with each other, the first switch circuit 11 and the second switch circuit 12 will be described in detail with reference to fig. 2 and fig. 1.

The first switch circuit 11 includes a first control switch 110, and the first control switch 110 includes a first control terminal 111, a first input terminal 112, and a first output terminal 113. The first control end 111 is electrically connected to the first temperature sensor 14 and the second temperature sensor 15, respectively, and can receive a first control signal and a second control signal collected by the first temperature sensor 14 and the second temperature sensor 15. The first input terminal 112 is connected to one terminal of the power switch 18, and the first output terminal 113 is electrically connected to the first temperature sensor 14.

The second switching circuit 12 is also connected between the power supply switch 18 and the first temperature sensor 14. The second switch circuit 12 includes a second control switch 120, a third control switch 130 and a power adjusting module connected in series in sequence, the second control switch 120 includes a second control terminal 121, a second input terminal 122 and a second output terminal 123, the second control terminal 121 can receive the first control signal and control the second input terminal 122 and the second output terminal 123 to be disconnected from each other, and receive the second control signal and control the second input terminal 122 and the second output terminal 123 to be electrically connected (electrically clamped).

The third control switch 130 includes a third control terminal 131, a third input terminal 132 and a third output terminal 133, the third input terminal 132 is electrically connected to the second output terminal 123, and the third control terminal 131 can receive a third control signal collected by a third temperature sensor 16, and control the conduction between the third input terminal 132 and the third output terminal 133, so that the whole second switch circuit 12 is conducted.

The third output end 133 is connected to a power regulation module, in this embodiment, the power regulation module is a diode D1, and in other specific embodiments, the power regulation module may also be another unidirectional conducting device. When the second switch circuit 12 is turned on, the diode D1 plays a role of unidirectional conduction to the ac signal, that is, half power heats the heater 13, thereby achieving a heat preservation effect.

In addition, in this embodiment, the first temperature sensor 14, the second temperature sensor 15, and the third temperature sensor 16 are powered by an external power source or a rectified power source.

The utility model discloses a three temperature detect switch circuit heating and heat retaining theory of operation do: when the power switch 18 is closed and the whole circuit is powered on, the first temperature sensor 14 acquires the temperature T1 (for example, 20 ℃) at this time, and sends a first control signal to the first control terminal 111 and the second control terminal 121, at this time, the first control switch 110 is closed, the first switch circuit 11 is turned on, the second control switch 120 is turned off, the second switch circuit 12 is in an off state, current flows into the heater 13 from the first switch circuit 11, and the heater 13 enters a heating state. When the temperature detected by the second temperature sensor 15 is T2 (e.g. 100 ℃), a second control signal is sent to the first control terminal 111 and the second control terminal 121, at this time, the first control switch 110 is opened, the first switch circuit 11 is in an open state, the second control switch 120 is closed, but the third control switch 130 is still in an open state, and the second switch circuit 12 is also in an open state. When the temperature collected by the third temperature sensor 16 at this time is T3 (for example, 20 ℃ to 60 ℃), a third control signal is sent to the third control terminal 131, the third control switch 130 is closed, at this time, the second switch circuit 12 is turned on, because the second switch circuit 12 is provided with the diode D1, the diode D1 performs a unidirectional conduction function on the alternating current signal, the power of the heater 13 is only half of the power of the heating state, and the heating state is entered.

Example two

Please refer to fig. 3, which is a schematic circuit diagram of a three-temperature switch circuit according to an embodiment of the present invention. The difference between the present embodiment and the first embodiment is that the three-temperature controlled switch circuit of the present embodiment includes a control circuit 17, and the control circuit 17 is configured to send control signals to the first control terminal 111, the second control terminal 121, and the third control terminal 131.

Specifically, please refer to fig. 4, which is a part of a circuit module of a three-temperature switch circuit provided in the second embodiment of the present invention. The control circuit 17 includes a controller U1, a rectifying circuit 20, a key switch 21, and a first temperature sensor 14, a second temperature sensor 15, and a third temperature sensor 16. The rectifying circuit 20, the key switch 21, the first temperature sensor 14, the second temperature sensor 15 and the third temperature sensor 16 are all electrically connected with the controller U1. The controller U1 is further electrically connected to the first control terminal 111, the second control terminal 121 and the third control terminal 131 respectively.

The rectifying circuit 20 is used for rectifying the 220V alternating current into a voltage, such as 5V, which is in accordance with the operation of the controller U1 and the first temperature sensor 14, the second temperature sensor 15, and the third temperature sensor 16. The key switch 21 is used for directly receiving a key instruction of a user and sending a first control signal to the controller U1.

The controller U1 is configured to send the first control signal according to the temperature collected by the first temperature sensor 14 or a key instruction of the key switch 21, send the second control signal according to the temperature collected by the second temperature sensor 15, and send the third control signal according to the temperature collected by the third temperature sensor 16. The first control signal and the second control signal are both sent to the first control terminal 111 and the second control terminal 121, and the third control signal is sent to the third control terminal 131.

The principle of controlling the first control switch 110, the second control switch 120 and the third control switch 130 by the first control signal, the second control signal and the third control signal is the same as that of the first embodiment, and is not repeated herein.

Fig. 5 is a schematic circuit diagram of the first switch circuit 11 and the second switch circuit 12 according to the second embodiment of the present invention. The difference between this embodiment and the first embodiment further includes that the power adjusting module is a PCB 22, and the PCB 22 is used to adjust the output power of the second switch circuit 12, so that the heating temperature of the heater 13 meets the temperature of the heat preservation state. In other embodiments, the power conditioning module may be other, such as a high impedance resistor.

The first switch circuit 11 and the second switch circuit 12 are also respectively connected in series with a first indicator light L1 and a second indicator light L2, the first indicator light L1 and the second indicator light L2 are both LED lights, and are used for emitting light when the first switch circuit 11 and the second switch circuit 12 are switched on, when the first indicator light L1 is turned on, the electric kettle is in a heating state, and when the first indicator light L1 is turned on, the electric kettle is in a heat preservation state, so that a user can conveniently check the working state of the electric kettle at the moment.

The utility model discloses a three temperature control switch circuit and electric kettle, through adopting first switch circuit and second switch circuit's mutual switch-over, the heating and the heat preservation of two kinds of different powers can be realized to the heater, not only can make electric kettle can select different working methods when the primary water boiling and reheating, and the repetition when avoiding reheating is boiled, only needs a heating tube moreover, and the cost is lower, has practiced thrift the consumption simultaneously, is fit for a large amount of popularization.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Claims

1. A three-temperature control switch circuit is applied to an electric kettle and is characterized in that the three-temperature control switch circuit is connected with an alternating current power supply and comprises a first switch circuit, a second switch circuit and a heater, wherein the first switch circuit is connected with the second switch circuit in parallel and then connected with the heater in series with the alternating current power supply;

the first switch circuit comprises a first control switch comprising a first control terminal, a first input terminal and a first output terminal, the first control terminal being configured to receive a first control signal and control conduction between the first input terminal and the first output terminal, and to receive a second control signal and control disconnection between the first input terminal and the first output terminal;

the second switch circuit comprises a second control switch, a third control switch and a power regulation module which are sequentially connected in series, the second control switch comprises a second control end, a second input end and a second output end, the second control end is configured to receive the first control signal and control the second input end and the second output end to be disconnected, and the second control signal and control the second input end and the second output end to be electrically connected;

the third control switch includes a third control terminal, a third input terminal and a third output terminal, the third input terminal is electrically connected to the second output terminal, and the third control terminal is configured to receive a third control signal and control conduction between the third input terminal and the third output terminal.

2. The tri-temperature switch circuit of claim 1, further comprising a first temperature sensor, a second temperature sensor, and a third temperature sensor connected in series, the first temperature sensor configured to collect temperature and issue the first control signal, the second temperature sensor configured to collect temperature and issue the second control signal, and the third temperature sensor configured to collect temperature and issue the third control signal.

3. The three-temperature switch circuit according to claim 1, further comprising a controller, and a rectifying circuit, a key switch, a first temperature sensor, a second temperature sensor, and a third temperature sensor electrically connected to the controller, respectively, wherein the rectifying circuit is further connected to the ac power supply, and the controller is configured to issue the first control signal according to the temperature collected by the first temperature sensor or a signal of the key switch, issue the second control signal according to the temperature collected by the second temperature sensor, and issue the third control signal according to the temperature collected by the third temperature sensor.

4. The three-temperature controlled switch circuit according to claim 1 or 2, wherein the power conditioning module is a unidirectional conducting device, and the unidirectional conducting device is a diode.

5. The three temperature controlled switch circuit of claim 1 or 2, wherein the power conditioning module is a PCB board.

6. The three temperature controlled switch circuit of claim 1 or 2, wherein the power conditioning module is a resistor.

7. The three temperature controlled switch circuit of claim 1, wherein the first switch circuit further comprises a first indicator light and the second switch circuit further comprises a second indicator light.

8. The three-temperature switch circuit of claim 1, further comprising a dry-fire protection thermostat and a power switch, both of which are connected in series with the first and second switch circuits.

9. The three temperature controlled switch circuit of claim 1, wherein the heat generator comprises a resonant heating element and/or a resistive heating element.

10. An electric kettle, characterized in that, comprising the three temperature control switch circuit of any claim 1-9.