CN212229444U

CN212229444U - Control circuit for electric heating kettle and electric heating kettle

Info

Publication number: CN212229444U
Application number: CN202020760377.8U
Authority: CN
Inventors: 朱泽春; 黎岩; 张伟; 胡文飞
Original assignee: Joyoung Co Ltd
Current assignee: Shandong Jiuchuang Home Appliance Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-12-25
Anticipated expiration: 2030-05-09

Abstract

The utility model discloses a control circuit and electric heating kettle for electric heating kettle, this control circuit for electric heating kettle includes the kettle body, base, and control circuit includes detection circuitry and work return circuit, and this work return circuit includes upper coupler and lower coupler, and the upper coupler is located the kettle body, and the lower coupler is located the base, upper coupler and lower coupler are three ring coupler, and this detection circuitry includes controller and opto-coupler circuit; the optical coupling circuit is connected with the working loop, the upper coupler is coupled with the lower coupler, and the optical coupling circuit is conducted to output a detection signal; the input end of the controller is connected with the output end of the optocoupler circuit and used for acquiring a detection signal so as to provide a basis for detecting whether the working circuit is switched on or not. The control circuit for the electric heating kettle can accurately detect whether the working circuit is connected or not while saving cost.

Description

Control circuit for electric heating kettle and electric heating kettle

Technical Field

The utility model belongs to the technical field of the electrical heating kettle, concretely relates to a control circuit and electrical heating kettle for electrical heating kettle.

Background

With the development of science and technology, more and more cooking appliances appear, which provides great convenience to the life of users. For example, the electric heating kettle appearing in the market can have the functions of boiling water, heating milk, boiling tea and the like, and the kettle has multiple functions.

In the existing electric heating kettle, a kettle body is generally connected with a main control board through a coupler. However, in some existing electric heating kettles, the control panel cannot detect whether the kettle body is placed on the base, namely, whether the upper coupler arranged on the kettle body is coupled with the lower coupler arranged on the base or not can not be sensed. Therefore, if the kettle body is not placed on the base, namely the upper coupler and the lower coupler are not coupled, if a user triggers the switch button at the moment, actions such as water adding, heating and the like are likely to be triggered, the control precision of the whole circuit is not high, and electric shock accidents are likely to happen.

SUMMERY OF THE UTILITY MODEL

To foretell not enough, the utility model provides a control circuit and electric heating kettle for electric heating kettle, the control circuit for electric heating kettle of this application can be when saving the cost, and whether the accurate work return circuit that detects switches on.

The utility model discloses a realize through following technical scheme:

according to a first aspect, an embodiment of the present invention provides a control circuit for an electric heating kettle, the electric heating kettle comprises a kettle body, a base, the control circuit comprises a detection circuit and a working circuit, the working circuit comprises an upper coupler and a lower coupler, the upper coupler is disposed in the kettle body, the lower coupler is disposed in the base, the upper coupler and the lower coupler are three-ring couplers, and the detection circuit comprises a controller and an optical coupling circuit; the optical coupling circuit is connected with the working loop, the upper coupler is coupled with the lower coupler, and the optical coupling circuit is conducted to output a detection signal; the input end of the controller is connected with the output end of the optocoupler circuit and used for acquiring a detection signal so as to provide a basis for detecting whether the working circuit is switched on or not.

In an optional implementation manner, the lower coupler has three lower contacts, the three lower contacts are respectively connected with the live wire, the zero line and the ground wire, the upper coupler has three upper contacts, and the three upper contacts are respectively used for connecting the live wire, the zero line and the ground wire; the three lower contacts are respectively a metal column and two metal rings surrounding the periphery of the metal column, and the three upper contacts are respectively a metal column and two metal rings surrounding the periphery of the metal column.

In an optional implementation manner, the detection circuit further includes a control switch, and the control switch is connected in parallel with the optical coupling circuit and is connected in series with the working circuit.

In an optional implementation manner, the working circuit further comprises a heating device, and the heating device is arranged on the kettle body and connected with the upper coupler; if the controller receives a heating instruction input by a user and detects that the working loop is switched on, the controller controls the control switch to be switched on so as to provide working voltage for the heating device; wherein, the work circuit switch-on includes: the upper coupler and the lower coupler are normally connected and the heating device is communicated.

In an optional implementation manner, the controller is further configured to control the control switch to be turned off every preset time period to collect a detection signal, and determine whether the working circuit is turned on according to the detection signal.

In an alternative implementation, the detection circuit is disposed on the base.

In an optional implementation mode, the controller is used for determining that the working circuit is switched on when the detection signal is at a low level; when the detection signal is high level, the working circuit is determined to be open.

In an optional implementation manner, the detection circuit further includes a current limiting resistor, and the current limiting resistor is connected in series with the optical coupling circuit.

In an alternative implementation, the control switch includes at least one of: relay, silicon controlled rectifier.

According to a second aspect, the embodiment of the utility model provides an electric heating kettle, including the kettle body and base, electric heating kettle still includes the control circuit that is used for electric heating kettle of the arbitrary realization of first aspect.

Through the embodiment of the utility model provides a technical scheme can reach following technological effect:

1. the utility model discloses a control circuit for electric heating kettle is connected with work circuit through the opto-coupler circuit, goes up coupler and then the opto-coupler circuit switches on and exports detected signal with lower coupler coupling, and the controller can acquire this detected signal and put through in order to judge this work circuit to can accurately judge whether the kettle body correctly places in the base, and, can realize detecting through the opto-coupler circuit, need not increase the coupler lead wire, reduce product cost.

2. The utility model discloses a control circuit for electric heating kettle goes up the coupler and is the tricyclic coupler with lower coupler, and the tricyclic coupler is compared in common five-ring coupler on the market with low costs, when using in batches, can reduce product overall cost, and this control circuit also can reach the purpose whether the coupler put through with lower coupler in the accurate detection.

3. The utility model discloses a control circuit for electric heating kettle is provided with control switch, and this control switch is parallelly connected with the opto-coupler circuit, establishes ties with work circuit, adds control switch, can be with the opto-coupler circuit short circuit when the closure to control work circuit work, nimble control detection circuitry's operating condition.

4. The utility model discloses a control circuit for electric heating kettle, work circuit are including the device that generates heat, if the controller received user input's heating instruction and detected the work circuit switch-on, then control switch is closed to provide operating voltage to the device that generates heat, can avoid under the condition that work circuit did not switch-on, control switch is closed then can lead to the problem of taking place the incident, guarantees the heating security.

5. The utility model discloses a control circuit for electric heating kettle, controller can the interval at every interval predetermine the time quantum control switch disconnection to gather detected signal, judge whether switch-on of work circuit according to this detected signal, thereby judge the switch-on state of work circuit in the heating process, can't know the problem that whether the kettle body placed in the base always in the heating process with the solution.

6. The utility model discloses a control circuit for electric heating kettle, detection circuitry set up in the base, and circuit design is reasonable, the wiring of being convenient for.

7. The utility model discloses a control circuit for electric heating kettle, current-limiting resistor and opto-coupler circuit are established ties, can be so that when last coupler and lower coupler coupling are connected, carry out the current-limiting to work circuit, avoid producing the phenomenon of generating heat at work circuit in opto-coupler circuit testing process.

8. The utility model discloses electric heating kettle, last coupler and lower coupler coupling connection then opto-coupler circuit switch on and export detected signal among its control circuit, and the controller can acquire this detected signal and put through whether in order to judge this work circuit to can accurately judge whether the kettle body correctly places in the base, and, can realize detecting through opto-coupler circuit, need not increase the coupler lead wire, electric heating kettle is with low costs.

Drawings

Fig. 1 is a schematic circuit diagram of a control circuit for an electric kettle according to an embodiment of the present invention;

fig. 2 is a schematic diagram of another circuit structure of the control circuit for the electric heating kettle according to the embodiment of the present invention;

fig. 3 is a schematic diagram of an electric heating kettle according to an embodiment of the present invention;

reference numerals:

1-a detection circuit, 11-a controller, 12-an optical coupler circuit, 13-a control switch and 14-a current-limiting resistor;

2-working loop, 21-upper coupler, 22-lower coupler, 23-heating device;

3-pressing a key;

4-display circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that the terms of orientation such as left, right, up, down, front and back in the embodiments of the present invention are only relative concepts or are referred to the normal use state of the product, i.e. the traveling direction of the product, and should not be considered as limiting.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Example one

An embodiment of the utility model provides a control circuit for electric heating kettle, this electric heating kettle include the kettle body, base.

It should be noted that the electric heating kettle of the present embodiment may be, for example, an electric heating kettle such as a health preserving kettle, a water boiling kettle, etc., and the present embodiment is not limited thereto.

As shown in fig. 1, the control circuit includes a detection circuit 1 and a work circuit 2. The working circuit 2 comprises upper couplers 21 and lower couplers 22. The upper coupler 21 is arranged on the kettle body, and the lower coupler 22 is arranged on the base. The detection circuit 1 includes a controller 11 and an optical coupling circuit 12.

The optical coupler circuit 12 is connected to the working circuit 2. When the kettle body is placed on the base and is IN place, the lower coupler 22 on the base is coupled with the upper coupler 21 on the kettle body, the working circuit 2 is connected, then the circuit of ACL-IN (live wire input end) -optocoupler circuit 12-ACL-OUT (live wire output end) -ACN-IN (zero wire input end) is conducted, namely the optocoupler circuit 12 is conducted, and at this time, the optocoupler circuit 12 can output a detection signal.

The controller 11 is connected to the output end of the optical coupling circuit 12, so that the controller 11 can obtain the detection signal, and then the controller 11 can analyze the detection signal, for example, determine whether the working circuit is connected according to the high-low level state of the detection signal, that is, determine whether the upper coupler 21 and the lower coupler 22 are coupled, and also can determine whether the kettle body and the base are placed in place.

Specifically, if the upper coupler 21 and the lower coupler 22 are normally coupled, that is, connected, at this time, the optocoupler circuit 12 is turned on, and the output detection signal is at a low level; if the upper coupler 21 and the lower coupler 22 are not connected, the loop of the ACL-IN-optocoupler circuit 12-ACL-OUT-ACN-IN is disconnected at this time, the optocoupler circuit 12 is not connected, and the output detection signal is at a high level.

The utility model discloses a control circuit for electric heating kettle is connected with work return circuit 2 through opto-coupler circuit 12, go up coupler 21 and then opto-coupler circuit 12 switches on and exports detected signal with coupler 22 coupling connection down, controller 11 can acquire this detected signal and put through in order to judge this work return circuit 2 to can accurately judge whether the kettle body correctly places in the base, and, can realize detecting through opto-coupler circuit 12, need not increase the coupler lead wire, reduce product cost.

In some preferred implementations of the present embodiment, the upper coupler 21 and the lower coupler 22 are three-ring couplers. In practice, in order to connect the coupler to the temperature sensor, a five-ring coupler is generally used. However, the five-ring coupler is higher in cost than the three-ring coupler, and only the three-ring coupler can be used under the condition that a temperature sensor cannot be installed on some kettle bodies. In this implementation, use the three-ring coupler can reduce the whole cost of electric heating kettle product, and use the three-ring coupler to combine optical coupling circuit 12 to detect whether upper coupler 21 and lower coupler 22 normally switch on, improve the safety in utilization.

Specifically, as shown in fig. 1, the lower coupler 22 has three lower contacts connected to the live, neutral and ground wires, respectively, and the upper coupler 21 has three upper contacts connected to the live, neutral and ground wires, respectively. Specifically, the three lower contacts are respectively a metal column and two metal rings surrounding the periphery of the metal column, and the three upper contacts are respectively a metal column and two metal rings surrounding the periphery of the metal column. Thus, when the three upper contacts of the upper coupler 21 and the three lower contacts of the lower coupler 22 are coupled and connected, respectively, the live wire and the neutral wire are conducted to form a path, that is, the working circuit 2 is conducted.

In some preferred implementations, the detection circuit 1 further includes a control switch 13, and the control switch 13 is connected in parallel with the optical coupling circuit 12 and is connected in series with the working circuit 2. Thus, when the control switch 13 is turned off, if the working circuit 2 is turned on, the optical coupling circuit 12 and the working circuit 2 form a passage; when the control switch 13 is closed and the working circuit 2 is turned on, the control switch 13 and the working circuit 2 form a path, and the optical coupling circuit 12 is short-circuited. By additionally arranging the control switch 13, the optical coupling circuit 12 can be short-circuited when being closed, so that the work of the working circuit 2 is controlled, and the working state of the detection circuit 1 is flexibly controlled.

In some preferred implementations, the working circuit 2 further includes a heating device 23, and the heating device 23 is disposed on the kettle body and connected to the upper coupler 21.

The heating device 23 may be a heating tube, a heating resistance wire, or a heating plate, and the embodiment is not limited thereto. Specifically, as shown in fig. 2, the heating device 23 is a heating resistance wire R4.

As can be seen from fig. 1 and 2, the heat generating device 23 is connected to two contacts of the upper coupler 21, and when the upper coupler 21 is coupled to the lower coupler 22, the upper coupler 21, the heat generating device 23, and the lower coupler 22 form a path.

If the controller 11 receives a heating instruction input by a user and detects that the working circuit 2 is switched on, the control switch 13 is controlled to be closed to provide the working voltage for the heat generating device 23.

The heating instruction input by the user may be, for example, a heating instruction that is received by the controller 11 by the user pressing a "heating" button on the kettle body or the base, or may be a heating instruction that is sent to the controller 11 in another form, which is not limited in this embodiment.

The working circuit 2 is connected with the upper coupler 21 and the lower coupler 22, and the heating device 23 is connected. Since the working circuit 2 includes the upper coupler 21, the lower coupler 22, and the heat generating device 23, the working circuit 2 is turned on at this time means that all the devices are normally connected, and the problem of disconnection due to poor contact does not occur. When the control switch 13 is turned off, the working circuit 2 may be turned on only when the upper coupler 21 and the lower coupler 22 are normally connected and the heating device 23 is turned on and the detection signal output by the optical coupling circuit 12 is at a low level. When the working circuit 2 is determined to be switched on, the controller 11 can send a control signal to close the control switch 13, at this time, the optical coupling circuit 12 is short-circuited, and the heating device 23 is applied with a working voltage to heat the kettle body.

Therefore, only when the heating instruction input by the user is received and the working circuit 2 is detected to be switched on, the controller 11 controls the control switch 13 to be switched on to provide the working voltage for the heating device 23, so that the problems that the safety accidents of the user such as electric shock and the like can be caused by the fact that the control switch 13 is still switched on when the kettle body and the base are not placed in place, the upper coupler 21 and the lower coupler 22 are not switched on or the heating device 23 is switched off can be avoided, and the use safety is improved.

In order to solve the above problem, in some preferred implementations of this embodiment, the controller 11 may further control the control switch 13 to be turned off every predetermined time interval in order to solve the problem that the user still has a high risk of getting an electric shock if the kettle body is lifted by the user and leaves the base, and the control switch 13 is still closed to provide the operating voltage for the heating device 23.

When the control switch 13 is open, the control switch 13 — the working circuit 2 is open. At this time, if the working circuit 2 is in a path, that is, the upper coupler 21 is coupled with the lower coupler 22, and the heating device 23 is normally turned on, the opto-coupler circuit 12 — the working circuit 2 will form a path, and at this time, the detection signal output by the opto-coupler circuit 12 is at a low level, which indicates that the working circuit 2 is turned on, whereas, if the detection signal is at a high level, which indicates that the working circuit 2 is not turned on, the circuit is faulty.

Therefore, the controller 11 can collect the detection signal when the control switch 13 is turned off, and determine whether the work circuit 2 is turned on according to the high-low level state of the detection signal. Therefore, the connection state of the kettle body and the base can be still detected in the heating process, and the heating safety is ensured.

As shown in fig. 1, the detection circuit 1 further includes a current limiting resistor 14, and the current limiting resistor 14 is connected in series with the optical coupler circuit 12. Therefore, when the upper coupler 21 and the lower coupler 22 are coupled, the working circuit 2 is limited in current, and the phenomenon that the working circuit 2 generates heat in the detection process of the optical coupling circuit 12 is avoided. As shown in fig. 2, the current limiting resistor 14 includes a resistor R1 and a resistor R2.

As shown in fig. 2, the control switch 13 may be specifically a relay, and the controller 11 may output a control signal to control the relay to be turned on or off; the control switch 11 may also be a thyristor, which is not limited in this embodiment.

Through the control circuit of this embodiment, can detect the coupling connection state of upper coupler 21 and lower coupler 22 through opto-coupler circuit 12, whether to place the kettle body in place with the base promptly and detect, detection circuit is with low costs.

Example two

The embodiment of the utility model provides an electric heating kettle, this electric heating kettle include the kettle body and base, and electric heating kettle still includes the control circuit who is used for electric heating kettle in the arbitrary realization of embodiment one.

Specifically, the control circuit includes a detection circuit 1 and a working circuit 2, and the detection circuit 1 includes a controller 11, an optical coupling circuit 12, and a control switch 13. Here, the detection circuit 1 may be provided on a base, and a control board on which electronic components are mounted may also be provided on the base, thereby facilitating wiring design.

Preferably, as shown in fig. 3, the electric kettle of the present embodiment further comprises a key 3 and a display circuit 4. The display circuit 4 may specifically include a display device such as a nixie tube, an LED, and an LCD. Specifically, when the controller 11 receives a heating instruction sent by the key 3 and a detection signal indicating that the working circuit 2 is turned on and detected by the optical coupling circuit 12, the controller 11 may control the control switch 13 to be turned on, and apply a working voltage to the heating device 23, and the controller 11 may also send a control signal to the display circuit 4 at the same time, so that the display circuit 4 displays indication information indicating that the heating operation is started, where the indication information is, for example, that a display lamp is turned on, which is not limited in this embodiment.

The utility model discloses electric heating kettle, last coupler 21 among its control circuit and coupler 22 coupling connection then opto-coupler circuit 12 switch on and export detected signal, and controller 11 can acquire this detected signal and put through in order to judge whether this work circuit 2 is put through to can accurately judge whether the kettle body correctly places in the base, and, can realize detecting through opto-coupler circuit 12, need not increase the coupler lead wire, electric heating kettle is with low costs.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A control circuit for an electric kettle, the electric kettle comprising a kettle body, a base, the control circuit comprising a detection circuit and a working circuit, the working circuit comprising an upper coupler and a lower coupler, the upper coupler being disposed in the kettle body, the lower coupler being disposed in the base, the control circuit being characterized in that the upper coupler and the lower coupler are three-ring couplers, the detection circuit comprising: a controller and an optocoupler circuit;

the optical coupling circuit is connected with the working loop, the upper coupler is coupled with the lower coupler, and the optical coupling circuit is conducted to output a detection signal;

and the input end of the controller is connected with the output end of the optical coupling circuit and is used for acquiring the detection signal so as to provide a basis for detecting whether the working circuit is switched on or not.

2. The control circuit of claim 1, wherein the lower coupler has three lower contacts that are connected to the live, neutral and ground wires, respectively, and the upper coupler has three upper contacts that are connected to the live, neutral and ground wires, respectively; the three lower contacts are respectively a metal column and two metal rings surrounding the periphery of the metal column, and the three upper contacts are respectively a metal column and two metal rings surrounding the periphery of the metal column.

3. The control circuit of claim 1, wherein the detection circuit further comprises a control switch connected in parallel with the optocoupler circuit and in series with the working circuit.

4. The control circuit of claim 3, wherein the working circuit further comprises a heating device, the heating device is arranged on the kettle body and connected with the upper coupler;

if the controller receives a heating instruction input by a user and detects that the working loop is switched on, the controller controls the control switch to be switched on so as to provide working voltage for the heating device;

wherein the working circuit is switched on and comprises: the upper coupler and the lower coupler are normally connected, and the heating device is communicated.

5. The control circuit of claim 3, wherein the controller is further configured to control the control switch to be turned off every preset time period to collect the detection signal, and determine whether the working circuit is turned on according to the detection signal.

6. The control circuit of any of claims 1-5, wherein the detection circuit is disposed at the base.

7. The control circuit of claim 1, wherein the controller is configured to determine that the working circuit is on when the detection signal is low; and when the detection signal is in a high level, determining that the working circuit is broken.

8. The control circuit of claim 1, wherein the detection circuit further comprises a current limiting resistor in series with the optocoupler circuit.

9. The control circuit of claim 3, wherein the control switch comprises at least one of: relay, silicon controlled rectifier.

10. An electric kettle comprising a kettle body and a base, characterised in that the electric kettle further comprises a control circuit for the electric kettle as claimed in any one of claims 1 to 9.