CN103911819A - Heating control circuit and washing machine - Google Patents

Abstract

The invention relates to a heating control circuit and a washing machine. The heating control circuit comprises a gate control circuit and at least two heating circuits; each heating circuit is connected with the gate control circuit; the gate control circuit is used for performing alternative gate control on the heating circuits. According to the heating control circuit and the washing machine, the plurality of heating circuits do not need to work simultaneously and accordingly damage to a device due to too large loads is avoided, the safety hidden trouble is eliminated, and the safety performance of the device such as the washing machine which is provided with at least two heating circuits is improved.

Description

Heating control circuit and washing machine

technical field

The invention relates to the technical field of automatic control, in particular to a heating control circuit and a washing machine.

Background technique

At present, drum washing machines generally have two functions of water heating and air drying heating. The water heating circuit is used for heating the washing water of the washing machine, and the air-drying heating circuit is used for air-drying and heating the clothes and/or the washing drum.

Under the normal operation of the washing machine, the water heating circuit and the wind heating circuit will not operate at the same time. If the two heating circuits operate at the same time due to abnormal settings of the washing machine, etc., a large operating current may be generated, which may damage the machine and pose a safety hazard. However, the prior art still lacks a corresponding security solution.

Contents of the invention

A brief overview of the invention is given below in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical parts of the invention nor to delineate the scope of the invention. Its purpose is merely to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

The invention provides a heating control circuit and a washing machine, which are used to improve the safety performance of equipment provided with at least two heating circuits, such as washing machines.

In one aspect, the present invention provides a heating control circuit, comprising: a gating control circuit and at least two heating circuits, each of the heating circuits is respectively connected to the gating control circuit, and the gating control circuit is used for Each of the heating circuits performs alternative gating control.

On the other hand, the present invention also provides a washing machine, including the above-mentioned heating control circuit.

In the technical solution provided by the present invention, the gating control circuit can select one gating control for multiple heating circuits, avoiding multiple heating circuits working at the same time, thus avoiding damage to the equipment due to excessive load, and eliminating safety hazards. Hidden dangers, improve the safety performance of equipment with at least two heating circuits such as washing machines.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of an optional structure of a heating control circuit provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of an optional structure of a heating control circuit provided by Embodiment 2 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

FIG. 1 is a schematic diagram of an optional structure of a heating control circuit provided by Embodiment 1 of the present invention. As shown in Figure 1, the heating control circuit provided by this embodiment includes: a gating control circuit 1 and at least two heating circuits 2, each of the heating circuits 2 is connected to the gating control circuit 1, and the gating control circuit The control circuit 1 is used for selectively controlling each of the heating circuits 2 .

In the heating control circuit provided in this embodiment, the gating control circuit can select one gating control for multiple heating circuits, avoiding multiple heating circuits working at the same time, thereby avoiding damage to the equipment due to excessive load, eliminating Potential safety hazards are eliminated, and the safety performance of equipment provided with at least two heating circuits is improved.

The specific circuit implementation manner of the gating control circuit in the above technical solution is not limited. Optionally, the at least two heating circuits may include a first heating circuit N1 and a second heating circuit N2, as shown in FIG. 2 , an optional circuit implementation of the gating control circuit may include a first relay and a second Two relays; the first relay includes a first relay body (including the first relay power supply coil K1 and the first diode D1), the first relay body is provided with a first incoming line terminal L1, a first normally closed terminal NC1 and the first normally open terminal NB1; the second relay includes a second relay body (including the second relay power supply coil K2 and the second diode D2), and the second relay body is provided with a second incoming line The terminal L2, the second normally closed terminal NC2 and the second normally open terminal NB2. The first relay body and the second relay body are respectively connected to an external gating control signal source, the first incoming terminal L1 is connected to the first heating circuit N1, and the first normally open terminal NB1 It is connected to the second normally closed terminal NC2, the second heating circuit N2 is connected to the second normally open terminal NB1, and the second incoming line terminal L2 is used as a live wire input terminal.

The scheme shown in Fig. 2 can effectively ensure that one of the two heating circuits works. An optional working process. For example, the second incoming line terminal L2 is connected to the live wire, and the first incoming line terminal L1 is connected to the first normally closed terminal NC1; The second normally open terminal NB2, the second heating circuit works; if the first relay body also receives the start working command at this time, because the first heating circuit does not form an electric circuit and cannot work, it can be guaranteed by simple circuit control Choose one of the two heating circuits to work, which improves the safety performance of the equipment.

Optionally, the above-mentioned first relay and/or the second relay may be single-pole double-throw relays, which can meet the application requirements of the on-off control of the two heating circuits, and also facilitate the simplification of the circuit structure.

Optionally, the above-mentioned heating control circuit may further include a power supply, and the power supply is connected to the second incoming line terminal. In this solution, the power supply can provide power for the two heating circuits respectively.

Optionally, the above-mentioned heating control circuit may also include an alarm detection circuit, the alarm detection circuit is connected to the gating control circuit, and is used to output Alarm information. Alarm information such as buzzer signal, alarm light flashing signal, etc. This solution can alarm in time when the heating circuit of the equipment is working abnormally, which is convenient for the user to discover the abnormality of the equipment and troubleshoot in time.

Further, the present invention also provides a washing machine, which includes any one of the above heating control circuits. For example, when the at least two heating circuits include a first heating circuit and a second heating circuit, the first heating circuit includes a first heater for heating the washing water of a washing machine, and the second heating circuit includes A second heater for heat treatment of laundry and/or drum air-drying. Or, for example, when the at least two heating circuits include a first heating circuit and a second heating circuit, the first heating circuit includes a second heater for washing clothes and/or drying the washing tub, The second heating circuit includes a first heater for heating the washing water of the washing machine. Optionally, the washing machine can be a drum washing machine.

When the washing machine is in normal working condition, the first heating circuit of the washing machine for water heating and the second heating circuit for air-dry heating cannot work at the same time. When the first heating circuit of the washing machine receives an instruction to start working, the first heating The circuit is working while the second heating circuit is not working. Conversely, when the second heating circuit of the washing machine receives an instruction to start working, the second heating circuit is working while the first heating circuit is not working, thereby preventing the two circuits from working at the same time. It also avoids damage to the complete machine of the washing machine due to excessive load, eliminates potential safety hazards, and improves the overall safety performance of the washing machine.

In the above-mentioned embodiments of the present invention, the serial numbers of the embodiments are only for convenience of description, and do not represent the advantages and disadvantages of the embodiments. The description of each embodiment has its own emphases, and for the part that is not described in detail in a certain embodiment, refer to the relevant descriptions of other embodiments.

In the embodiments of the device and method of the present invention, obviously, each component or each step can be decomposed, combined and/or recombined after decomposing. These decompositions and/or recombinations should be considered equivalents of the present invention. Meanwhile, in the above descriptions of specific embodiments of the present invention, features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, and combination of features, or replace features in other embodiments.

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more other features, elements, steps or components.

Finally, it should be noted that although the present invention and its advantages have been described in detail above, it should be understood that various changes, substitutions and modifications can be made without departing from the spirit and scope of the present invention defined by the appended claims. transform. Moreover, the scope of the present invention is not limited to the specific embodiments of the procedures, devices, means, methods and steps described in the specification. Those of ordinary skill in the art will readily appreciate from the disclosure of the present invention that existing and future devices that perform substantially the same function or obtain substantially the same results as the corresponding embodiments described herein can be used in accordance with the present invention. The developed process, device, means, method or steps. Accordingly, the appended claims are intended to include within their scope such processes, means, means, methods or steps.

Claims (9)

1. a heating control circuit, it is characterized in that, comprise: gate control circuit and at least two heater circuits, each described heater circuit is connected with described gate control circuit respectively, and described gate control circuit is for selecting a gating control to each described heater circuit.

2. heating control circuit according to claim 1, is characterized in that,

Described at least two heater circuits comprise the first heater circuit and the second heater circuit;

Described gate control circuit comprises the first relay and the second relay; Described the first relay comprises the first relay main body, and described the first relay main body is provided with the first input terminal, the first normally closed terminal and the first Chang Kaiduan; Described the second relay comprises the second relay main body, and described the second relay main body is provided with the second input terminal, the second normally closed terminal and the second Chang Kaiduan;

Described the first relay main body is connected with outside gating control signal source respectively with described the second relay main body, described the first input terminal is connected with described the first heater circuit, described the first Chang Kaiduan and described the second normal-closed end sub-connection, described the second heater circuit and described the second Chang Kaiduan sub-connection, described the second input terminal is as live wire incoming end.

3. heating control circuit according to claim 2, is characterized in that, described the first relay and/or described the second relay are single-pole double throw relay.

4. heating control circuit according to claim 2, is characterized in that, also comprises power supply, and described power supply is connected with described the second input terminal.

5. according to the arbitrary described heating control circuit of claim 1-4, it is characterized in that, also comprise: alarm detection circuit, described alarm detection circuit is connected with described gate control circuit, for output alarm information in the time at least two heater circuits of described gate control circuit while gating being detected.

6. a washing machine, is characterized in that, comprises the heating control circuit as described in as arbitrary in claim 1-5.

7. washing machine according to claim 6, it is characterized in that, in the time that described at least two heater circuits comprise the first heater circuit and the second heater circuit, described the first heater circuit comprises the primary heater for carrying out washing of drum type washing machine water heat treated, and described the second heater circuit comprises the secondary heater for carrying out washing clothes and/or the air-dry heat treated of cylindric washer.

8. washing machine according to claim 6, it is characterized in that, in the time that described at least two heater circuits comprise the first heater circuit and the second heater circuit, described the first heater circuit comprises the secondary heater for carrying out washing clothes and/or the air-dry heat treated of cylindric washer, and described the second heater circuit comprises the primary heater for carrying out washing of drum type washing machine water heat treated.

9. according to the arbitrary described washing machine of claim 6-8, it is characterized in that, described washing machine is roller washing machine.