CN113430793B

CN113430793B - Washing machine

Info

Publication number: CN113430793B
Application number: CN202110681105.8A
Authority: CN
Inventors: 葛金榜; 崔增良; 高丽君; 王增强; 丁兆波
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2023-04-07
Anticipated expiration: 2041-06-18
Also published as: CN113430793A

Abstract

The application provides a washing machine, which at least comprises a first heating wire, a first power supply circuit, a switching device and a control circuit; the first power supply circuit is used for supplying power to the first heating wire; the first power supply circuit and the first heating wire are arranged outside a control panel of the washing machine; one end of the switching device is connected with the first heating wire, the other end of the switching device is connected with the first power supply circuit, and the switching device is controlled by the control circuit; the control circuit is arranged on the control panel; the control circuit is used for controlling the switching element to be conducted when the washing machine has a heating demand so as to enable the first heating wire to start to work. The technical scheme in the application can improve the safety of the washing machine during heating, especially during heating by the high-power heating wire.

Description

Washing machine

Technical Field

The application relates to the technical field of electric control design of washing machines, in particular to a washing machine.

Background

At present, in the technical field of electric control design of washing machines, a main control circuit is generally used for controlling a strong electric switch to control the heating wire to work, and the current of the heating wire is totally passed through a control panel, however, such a control method has the following defects: 1. the size of the control board is limited, so that the size of the circuit for controlling the heating wire on the control board is limited, and the power of the controlled heating wire is limited; 2. if the electric control board controls the high-power heating wire, large current passes through the electric control board when the heating wire works, and the copper foil of the electric control board generates heat, so that the reliability and the safety of the control board are reduced.

Therefore, how to improve the safety of the washing machine with the high-power heating wire during heating is a problem that those skilled in the art are trying to solve.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

An object of the present application is to improve the safety of a washing machine when heated, especially when heated by a high power heating wire.

In order to solve the technical problem, the following technical scheme is adopted in the application:

the present application provides a washing machine, comprising a first heating wire; the first power supply circuit is used for supplying power to the first heating wire; the first power supply circuit and the first heating wire are arranged outside a control panel of the washing machine; one end of the switching device is connected with the first heating wire, and the other end of the switching device is connected with the first power supply circuit; the control circuit is arranged on the control board; the switch device is controlled by a control circuit of the washing machine; the control circuit is used for controlling the switching element to be conducted when the washing machine has a heating demand so as to enable the first heating wire to start to work.

In one embodiment, the washing machine further comprises a second heating wire and a second power supply circuit, both of which are disposed outside the control panel; the control circuit is used for controlling the second power supply circuit to supply power to the second heating wire.

In one embodiment, the switching device comprises a contactor, and the control circuit is connected with a control end of the contactor to control the first heating wire and/or the second heating wire to be heated through the contactor.

In one embodiment, the contactor includes a control coil, at least two pairs of contacts, and at least two conductive links; one conductive connecting rod corresponds to one pair of contacts; when the conductive link connects a corresponding pair of contacts, a conductive path is formed.

In one embodiment, any pair of contacts is a normally open contact.

In one embodiment, the washing machine further comprises a first heater wire filter connected in series with the first heater wire for filtering noise generated when the first heater wire is heated.

In one embodiment, the power of the first heating wire is not lower than 2kw.

In one embodiment, the sum of the powers of the first and second heating wires is not lower than 2kw.

In one embodiment, the external power source of the washing machine is a three-phase power source; the first power supply circuit is connected with a first phase of the three-phase power supply, the second power supply circuit is connected with a second phase of the three-phase power supply, and the control circuit is connected with a third phase of the three-phase power supply.

In one embodiment, the external power source of the washing machine is a single-phase power source; the single-phase power supply comprises a first live wire, a second live wire and a third live wire which are connected in parallel; the first live wire is connected to the first power supply circuit, the second live wire is connected to the second power supply circuit, and the third live wire is connected to the control circuit. According to the technical scheme, the beneficial effects of the application are as follows:

in this application, give first heater strip power supply through setting up the first power supply circuit outside the control panel for the domain design of control panel etc. will no longer produce great restriction to the power of first heater strip, make the control panel than can be safer drive powerful first heater strip for the washing machine heating. Thereby ensuring the safety of the washing machine during heating.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic structural diagram of a heating wire electric control system 100 of a washing machine according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a heating wire electric control system 100 of a washing machine according to another embodiment of the present application;

fig. 3 is a schematic circuit structure diagram of a heater wire electric control circuit 200 of a washing machine according to an embodiment of the present application;

fig. 4 is a schematic circuit structure diagram of an external power supply of a washing machine according to another embodiment of the present application.

Detailed Description

While this application is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the application and is not intended to limit the application to that as illustrated herein.

Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the application, and does not imply that every embodiment of the application must have the explained feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, directional references (such as up, down, left, right, front, and rear) are used to explain the structure and movement of the various elements of the present application not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

The related art of the present application is described below. At present, domestic washing machine products mainly adopt a scheme that a main control program controls a heating wire to heat through controlling a strong electric switch, and the power of the heating wire is generally within 2KW. When the power of the heating wire is increased, if the control mode is continuously used, on one hand, the selected strong current switch body can be large, and on the other hand, the large current of the high-power heating wire during working completely passes through the copper foil of the control panel, so that the design requirement on the panel diagram of the control panel is high, and the working safety of the control panel can be influenced.

Based on the difficulties, the application provides a washing machine with a brand-new heating wire electric control system 100, which is used for driving a high-power heating wire to work.

The preferred embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a heater wire electric control system 100 of a washing machine according to an embodiment of the present application. As shown in fig. 1, in this embodiment, the heater wire electrical control system 100 comprises at least a first heater wire 30, a control circuit 40, a switching device 20 and a first power supply circuit 10. Wherein the first power supply circuit 10 is used for supplying power to the first heating wire 30. The control end of the switching device 20 is connected with the control circuit and is controlled by the control circuit 40, and the control circuit 40 controls the on-off state of the first power supply circuit 10 and the first heating wire 30 by controlling the switching device 20; the control circuit 40 is disposed on a control panel 50 of the washing machine, and the first power supply circuit 10 and the switching device 20 are disposed outside the control panel 50.

Specifically, when the control circuit 40 controls the switching device 20 to be closed, the first power supply circuit 10 supplies power to the first heating wire 30, and the first heater starts heating. During heating of the first heating wire 30, a current flows from the first power supply circuit 10 to the first heating wire 30 via the switching device 20, in other words, the current flowing through the first heating wire 30 does not pass through the control board 50 where the control circuit 40 is located.

Therefore, the layout design and the like of the control board can not limit the power of the first heating wire 30 any more, and the working current of the first heating wire 30 can not pass through the main control board, so that the working safety of the washing machine can be ensured during heating.

In one embodiment, the control circuit 40 on the control board 50 can control the switch device 20 through a strong switch, so that the strong switch can be controlled to be turned on when heating is not needed, and the energy consumption of the washing machine in a standby state can be reduced. The strong current switch may be any one of switches such as a relay or a controllable transistor.

In one embodiment, the first heating wire 30 is a relatively high power heating wire, illustratively, the power may be not lower than 2KW, which is used to heat the washing water in the washing machine when the washing machine is washing, thereby rapidly heating the washing water to improve the washing efficiency.

In one embodiment, since the technical solution of the present application can improve the safety of the washing machine when the high-power heating wire is used for heating, in one embodiment, the sum of the powers of the first heating wire and the second heating wire is at least 2kw, and the at least 2kw heating wire is used for heating the washing water in the washing machine when the washing machine is used for washing, so that the washing water is rapidly heated to improve the washing efficiency.

Fig. 2 is a schematic structural diagram of a heating wire electric control system 100 of a washing machine according to another embodiment of the present application. As shown in fig. 2, in this embodiment, the heating wire electric control system 100 of the washing machine further includes a second heating wire 70 and a second power supply circuit 60, and the second power supply circuit 60 and the second heating wire 70 are also disposed outside the control board 50; the control circuit 40 also controls the on/off of the second power supply circuit 60 and the second heating wire 70 by controlling the switching device 20, and when the second power supply circuit 60 is connected with the second heating wire 70, the second power supply circuit 60 supplies power to the second heating wire 70. In another embodiment, the control circuit 40 also controls the on/off of the second power supply circuit 60 and the second heating wire 70 through another switching device, so as to realize the respective control of the first heating wire 30 and the second heating wire 70.

In one embodiment, the control board 50, the first heating wire 30 and the second heating wire 70 may be respectively powered by different power supply circuits. Illustratively, the external power source of the washing machine supplies power to the control board 50 through the control board power supply circuit 80, supplies power to the first heating wire 30 through the first power supply circuit 10, and supplies power to the second heating wire 70 through the second power supply circuit 60 to form different power supply loops, so as to prevent the working current for the heating wires from flowing into the control board 50 and affecting the safety of the operation of the control board 50. In another embodiment, the external power source of the washing machine may simultaneously supply power to the first and

second heating wires

30 and 70 through the same power supply circuit, only by the fact that the operating current of the heating wires does not flow through the control board 50.

Specifically, the first power supply circuit 10 and the second power supply circuit 60 may be independent of each other and respectively used for supplying power to the first heating wire 30 and the second heating wire 70, so that the current passing through the first heating wire 30 no longer passes through the second heating wire 70, thereby ensuring safety during heating. The power of the first and

second heating wires

30, 70 may be the same or different, and the first and

second heating wires

70, 70 may or may not operate simultaneously. Under the condition that first heater strip 30 and second heater strip 70 work simultaneously, can increase heating power, accelerate heating efficiency on the basis of guaranteeing the security of control panel 50, under the condition that first heater strip 30 and second heater strip 70 do not work simultaneously, can realize the adjustable of heating gear under the main control procedure on the control circuit to and switching element 20's hardware support, thereby can satisfy individualized heating demand.

It should be noted that one switching device 20 may simultaneously perform the operation of the plurality of heating wires, or may control the operation of the heating wires through the plurality of switching devices 20, and the switching device 20 may include one or more of a contactor, a relay, and a transistor, which is not limited herein.

In one embodiment, the washing machine applied in the technical solution of the present application may be a large-scale commercial washing machine, the heating wires used may further include a third heating wire, the third heating wire may be connected to the first power supply circuit or the second power supply circuit to obtain electric energy, and the third heating wire may also have a separate power supply circuit. Therefore, a plurality of heating wires can be used, different heating requirements of the commercial washing machine are met, and only the working current flowing through the plurality of heating wires does not flow through the control board 50.

The inventive concept of the present application will be described below in two specific embodiments to make the inventive concept of the present application obvious.

Fig. 3 is a schematic circuit structure diagram of a heater wire electric control circuit 200 of a washing machine according to an embodiment of the present application.

As shown in fig. 3, in this embodiment, the external power connector 90 of the washing machine is used for connecting an external power source, and in this embodiment, the external power source is a three-phase power source, and the three-phase power source is composed of a live line L1, a live line L2, a live line L3, a neutral line N, and a ground line PE. After the external power source is connected to the external power connector 90 of the washing machine, the zero line N is divided into three harnesses N1, N2, N3, and is combined with the live line L1, the live line L2, and the live line L3, respectively, to form three power supply circuits. Wherein, L1 and N1 form the control panel power supply circuit, supply power for each circuit module that is located on control panel 50 through the main filter, including control circuit 40, L2 and N2 form first power supply circuit, give first heater strip filter and first heater strip 30 power supply through the contactor, and L3 and N3 form the second power supply circuit, give second heater strip filter and second heater strip 70 power supply through the contactor. Therefore, on one hand, a power supply circuit for supplying power to the first heating wire 30 and the second heating wire 70 does not pass through the control board 50 any more, so that the safety of the control board 50 during the operation of the heating wires is ensured, and on the other hand, factors such as the layout design of the control board 50 and the like do not limit the power of the first heating wire 30 and the power of the second heating wire 70 any more, so that the individualized heating requirement of the washing machine can be met.

In this embodiment, the switching device 20 is a contactor. The control circuit 40 is connected to the control terminals of the contactors to control the operation of the first and

second heating wires

30 and 70 through the contactors. Specifically, the control circuit 40 is connected to the control coil 24 through the switches K1 and K2, the control coil 24 is wound on the iron core, when the switches K1 and K2 are closed, the control coil 24 is energized to make the iron core generate an electromagnetic attraction force to drive the elastic piece 23 to move, the elastic piece 23 is fixedly connected to the plurality of conductive connecting rods 21, the plurality of conductive connecting rods 21 are connected through the insulating connecting rods 22, the conductive connecting rods 21 and the insulating connecting rods 22 are arranged in a vertical direction, when the elastic piece 23 moves, the conductive connecting rods 21 are driven to move towards the iron core, and after the elastic piece moves a set distance, the elastic piece 23 is in contact with the contacts, in this embodiment, four pairs of contacts are provided, and the four pairs of contacts are A1-A2, B1-B2, C1-C2, and D1-D2, respectively. The contact A1 is connected with a live wire L2, and the contact A2 is connected with one end of the first heating wire filter; contact B1 connects zero line N2, contact B2 connects the other end of first heater strip filter, contact C1 connects live wire L3, contact C2 connects the one end of second heater strip filter, contact D1 connects zero line N3, contact D2 connects the other end of second heater strip filter, thereby make electrically conductive connecting rod 21 and contact back, form a plurality of electrically conductive routes, thereby make first supply circuit give first heater strip power supply, make second supply circuit give the power supply of second heater strip, thereby control circuit 40 reaches the target that the control heater strip heats through control contactor. The first heating wire filter is used for filtering noise generated when the first heating wire is heated, interference on other devices is reduced, and the use safety of the washing machine is guaranteed. Likewise, the second heating wire 70 is located at the rear end of the second heating wire filter in the direction of the circuit of the second power supply circuit, and the same effect is also achieved. In further embodiments, the first and second heater wire filters may not be provided when the washing machine is judged to be satisfactory in the electromagnetic compatibility test.

It should be mentioned that, when the washing machine is in standby and the control contactor is turned off, the first heater strip filter, the first heater strip 30, the second heater strip filter and the second heater strip 70 are not powered on, so that the power consumption in standby can be reduced, and energy saving is facilitated.

In the embodiment, the four pairs of contacts A1-A2, B1-B2, C1-C2 and D1-D2 are normally open contacts respectively, so that the condition of heating by mistake is prevented.

Since the technical scheme of the application can improve the safety of the washing machine when the high-power heating wire is heated, in one embodiment, the power of the first heating wire is at least 3kw.

Fig. 4 is a schematic circuit structure diagram of an external power supply of a washing machine according to another embodiment of the present application. As shown in fig. 4, in this embodiment, the external power source connected to the washing machine is a single-phase power source, the single-phase power source is composed of a live line L, a neutral line N and a ground line PE, and the washing machine is connected to the external power source through a single-phase power connector 91. At the entrance of an external power supply entering the whole washing machine, a live wire L is divided into two live wire branches L1 and L2, namely a first live wire and a second live wire, and a zero wire N is divided into two zero wire branches N1 and N2. Consistent with the embodiment of fig. 3, L1 and N1 form a first power supply circuit, L2 and N2 form a second power supply circuit, and L and N form a control board power supply circuit, so as to supply power to the first heating wire, the second heating wire, and the control circuit, respectively, to achieve improved safety when the washing machine is heated when an external power source connected to the washing machine is a single-phase power source.

While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A washing machine, characterized by comprising:

a first heater wire;

the first power supply circuit is used for supplying power to the first heating wire; the first power supply circuit and the first heating wire are arranged outside a control panel of the washing machine;

a second heating wire;

the second power supply circuit is used for supplying power to the second heating wire, and the second power supply circuit and the second heating wire are arranged outside the control board;

one end of the switching device is connected with the first heating wire and the second heating wire, and the other end of the switching device is connected with the first power supply circuit and the second power supply circuit;

the control circuit is arranged on the control board; the control end of the switching device is connected with the control circuit; the control circuit is used for controlling the switching device to be conducted when the washing machine has a heating requirement so as to enable the first heating wire and/or the second heating wire to start to work; the switch device comprises a control coil, an elastic sheet and a conductive rod, wherein the control coil is wound on an iron core, the conductive rod is fixedly connected with the elastic sheet, the control coil is connected with the control circuit, the control coil is controlled by the control circuit to be electrified so that the iron core generates electromagnetic force to drive the elastic sheet to move until the conductive rod is contacted with a contact of the first power supply circuit and/or the second power supply circuit, and the first power supply circuit and/or the second power supply circuit are/is switched on;

washing machine still includes external power source, external power source is three phase current, external power source includes three live wire, zero line, three live wire respectively with the zero line combination forms first supply circuit, second supply circuit and control panel supply circuit, first supply circuit second supply circuit and mutual independence between the control panel supply circuit makes right first heater strip with the supply circuit that the second heater strip supplied power does not pass through the control panel.

2. The washing machine as claimed in claim 1, wherein the switching device includes a contactor, and the control circuit is connected with a control terminal of the contactor to control the first heating wire and/or the second heating wire to be heated by the contactor.

3. The washing machine as claimed in claim 2, wherein the contactor includes a control coil, at least two pairs of contacts, and at least two conductive links; one said conductive link corresponding to a pair of said contacts; when the conductive connecting rod is connected with a corresponding pair of the contacts, a conductive path is formed.

4. A washing machine as claimed in claim 3 wherein any pair of said contacts are normally open contacts.

5. The washing machine as claimed in claim 1, further comprising a first heater wire filter connected in series with the first heater wire for filtering noise when the first heater wire is heated.

6. A washing machine as claimed in claim 1, characterized in that the power of the first heating wire is not lower than 2kw.

7. A washing machine as claimed in claim 1, characterized in that the sum of the powers of the first and second heating wires is not lower than 2kw.

8. The washing machine as claimed in claim 1, wherein the external power supply of the washing machine is a three-phase power supply; the first power supply circuit is connected with a first phase of the three-phase power supply, the second power supply circuit is connected with a second phase of the three-phase power supply, and the control circuit is connected with a third phase of the three-phase power supply.

9. The washing machine as claimed in claim 1, wherein the external power source of the washing machine is a single-phase power source; the single-phase power supply comprises a first live wire, a second live wire and a third live wire which are connected in parallel; the first live wire is connected to the first power supply circuit, the second live wire is connected to the second power supply circuit, and the third live wire is connected to the control circuit.