Control method of clothes processing device and clothes processing device

Abstract

The invention discloses a control method of a clothes treatment device, belongs to the field of life electric appliances, solves the problem that the result of a heater controlled by half waves is relatively single, and adopts the technical scheme that a control unit adjusts the conduction time duty ratio of at least one heater according to actual needs to carry out chopping control; and keeping the real-time total output power of the clothes processing device not to exceed the rated output power of the clothes processing device. The invention is mainly used for realizing more diversified control results of the heater and further improving the heating efficiency. The invention further provides the clothes processing device, and the clothes processing device is controlled to work through the control method of the clothes processing device.

Description

Technical Field

[0001] The present invention relates to a clothing processing device, and in particular to a control method of a clothing processing device and the clothing processing device. Background Art

[0002] Prior art CN102203337A discloses a method for controlling a first laundry processing device having a first heater and an adjacent second laundry processing device having a second heater, specifically operating the first heater of the first laundry processing device; and operating the second heater of the second laundry processing device, wherein the operating steps are performed sequentially or in an alternating manner, so that only one heater is operating at any given moment to prevent heater overload. In this case, the laundry processing device cannot use the first heater and the second heater for continuous heating at the same time, and the heating efficiency cannot be improved.

[0003] In order to improve the heating efficiency, the prior art CN102061590A discloses a combined washing and drying machine system, and specifically discloses that the system working current can be logically judged in real time through the power management module, and the working current of the dryer heating tube or the washing machine heating tube can be individually controlled according to the judgment result. When it is judged that the actual collected working current is higher than the safe working current, the power management module 23 closes the second relay 28 to perform half-wave control on the dryer heating tube 22. Thereby, the working current of the entire system is reduced to within the safe working current range. The whole process is completely realized by logic control, and the control method is flexible and accurate, which greatly increases the safety of the system and avoids the cost of wiring for large currents for families. In addition, in the above embodiment, when the washing program of the washing machine ends or the washing machine heating tube is heated, the power control module can restore the power supply to the dryer heating tube, so that the system has a higher working efficiency under the premise of safe electricity use. However, when half-wave control is adopted, the washing machine heating tube or the dryer heating tube can only operate at half of the rated output power, and the control result is relatively simple, that is, the heater can only have three states: full power, half power and zero power. Moreover, it is easy for the system working current to be greater than the safe working current value after analog-to-digital conversion after half-wave control. At this time, the working current of the washing machine heating tube or the dryer heating tube can only be disconnected, and the improvement of heating efficiency is very limited. Summary of the invention

[0004] The purpose of the present invention is to provide a control method for a clothing processing device to solve the problem that the half-wave control result of the heater is relatively single, and more diverse control results can be obtained for multiple heaters, thereby further improving the heating efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a control method of a clothes processing device, the clothes processing device includes a control unit and at least two heaters, and the control method includes the following contents:

[0006] The control unit adjusts the on-time duty cycle of at least one heater to perform chopping control according to actual needs, so that the real-time total output power of the laundry processing device does not exceed the rated output power of the laundry processing device.

[0007] After adopting the above technical scheme, the present invention has the following advantages: since the control unit performs chopping control on at least one heater, the on-time of the controlled heater can be freely adjusted according to actual needs, so in theory, countless control results can be achieved. In addition, by adjusting the on-time duty ratios of multiple heaters respectively, multiple heaters can be kept working continuously. For example, in a clothing processing device with two heaters, when one heater needs full power output, the other heater can work with an extremely low on-time duty ratio, which can not only improve the heating efficiency, but also avoid the impact of frequent power on and off of the heater on the power supply circuit, and is also conducive to improving the service life of circuit components. Since the chopping control can be performed according to actual needs, when multiple heaters need to be chopping controlled, not only can the working states of multiple heaters be changed at the same time, but also only the heaters that need to adjust the working state can be adjusted, while other heaters that do not need to adjust the working state can remain the same. For example, in a clothing processing device with two heaters, only the working state of one heater is changed, and the working state of the other heater remains unchanged. The control freedom is high, and more diverse control results can be obtained.

[0008] Furthermore, before the working state of the heater is changed, according to the real-time total output power P of the laundry processing device 总 And the rated output power P 额 Calculate the remaining available output power P 剩 =P 额 -P 总 , the control unit adjusts the on-time duty cycle of at least one heater according to actual needs so that ΔP≤P 剩 , where ΔP=P1-P2, P1 is the real-time output power of all heaters after adjustment, and P2 is the real-time output power of all heaters before adjustment.

[0009] Furthermore, the operating state change of the heater includes starting and stopping.

[0010] Furthermore, the change of the working state of the heater includes adjusting the magnitude of the real-time output power.

[0011] Further, the heaters that need to be chopper controlled include a first heater and a second heater, the priority of the first heater is preset to be higher than that of the second heater, and when the real-time output power of the first heater needs to be increased, the real-time output power of the second heater is first reduced, and then the real-time output power of the first heater is increased;

[0012] Alternatively, the heaters that need to be chopping controlled include a first heater and a second heater, and the first heater is preset to have a higher priority than the second heater. When the real-time output power of the second heater needs to be increased, if the real-time total output power of the clothing processing device exceeds the rated output power after the real-time output power of the second heater is increased, the increase in the real-time output power of the second heater is reduced to ensure that the real-time total output power of the clothing processing device does not exceed the rated output power.

[0013] Furthermore, the control unit controls the on-time duty cycle of the heater according to a voltage signal of a power circuit of the laundry processing apparatus.

[0014] Furthermore, the control unit controls the on-time duty cycle of the heater by acquiring a temperature signal of a heating object of the heater.

[0015] The present invention also provides a clothing processing device, comprising at least one body, at least one heater arranged on the body, and at least one control unit, wherein the control unit adopts the control method of the clothing processing device described in any of the above technical solutions to control the operation of the heater.

[0016] Further, the control unit includes a control circuit board, and the control circuit board is electrically connected to all the heaters respectively;

[0017] Alternatively, the control unit includes a plurality of control circuit boards, the plurality of control circuit boards communicate with each other, and each control circuit board is electrically connected one-to-one with the heater;

[0018] Alternatively, the control unit includes a plurality of control circuit boards, the plurality of control circuit boards communicate with each other, and at least one control circuit board is electrically connected to at least two heaters respectively.

[0019] Furthermore, a first fast switch for adjusting the on-time duty cycle of the first heater is electrically connected between the heater that needs to be chopper controlled and the power supply circuit, and the first fast switch is controlled by the control unit. A second circuit switch is electrically connected between the heater that does not need to be chopper controlled and the power supply circuit.

[0020] Furthermore, the first fast switch has an execution end and a control end. The execution end of the first fast switch is connected in series with the power supply circuit and the heater that needs to be chopper controlled, and the control end of the first fast switch is electrically connected to the control unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] Figure 1 Schematic diagram of chopping control in the present invention;

[0023] Figure 2 is a flow chart of a control method of a clothes processing device in the present invention;

[0024] Figure 3 The figure is a schematic diagram of a control circuit of a clothes processing device in the present invention. DETAILED DESCRIPTION

[0025] 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 are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] The terms "first", "second", etc. (if any) in the specification and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish before a certain technical feature, it does not necessarily indicate that "first" is present. It should be understood that in the present invention, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present invention, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "Containing X, Y and Z", "Containing X, Y, Z" means that X, Y, and Z are all included, "Containing X, Y or Z" means that one of X, Y, and Z is included, and "Containing X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0027] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0028] The present invention first provides a control method for a clothes processing device, the clothes processing device includes a control unit and at least two heaters, and the control method includes the following contents:

[0029] The control unit adjusts the on-time duty cycle of at least one heater to perform chopping control according to actual needs, so that the real-time total output power of the laundry processing device does not exceed the rated output power of the laundry processing device.

[0030] Since the control unit performs chopping control on at least one heater, the on-time of the controlled heater can be freely adjusted according to actual needs, so in theory, countless control results can be achieved. In addition, by adjusting the on-time duty ratios of multiple heaters respectively, multiple heaters can be kept working continuously. For example, in a clothing processing device with two heaters, when one heater needs full power output, the other heater can work with an extremely low on-time duty ratio, which can not only improve the heating efficiency, but also avoid the impact of frequent power on and off of the heater on the power supply circuit, and is also conducive to improving the service life of circuit components. Since chopping control can be performed according to actual needs, when multiple heaters need to be chopping controlled, not only can the working states of multiple heaters be changed at the same time, but also only the heaters that need to adjust the working state can be adjusted, while other heaters that do not need to adjust the working state can remain the same. For example, in a clothing processing device with two heaters, only the working state of one heater is changed, and the working state of the other heater remains unchanged. The control freedom is high, and more diverse control results can be obtained.

[0031] Chopping control can refer to Figure 1 , where the shaded part is the on-time. By changing the chopping position and changing the area of ​​the shaded part, the on-time can be changed, thereby changing the output power of the heater whose working state needs to be adjusted. Different heaters can be controlled with different chopping amplitudes, thereby working with different output powers.

[0032] The following description will be made by taking an example that two heaters can be simultaneously subjected to chopping control, that is, the heaters that can be subjected to chopping control include a first heater and a second heater.

[0033] like Figure 2 As shown, in one embodiment, in order to achieve more precise control, before the working states of the first heater and the second heater are changed, the total output power P of the laundry processing device is set to the real-time value. 总 And the rated output power P 额 Calculate the remaining available output power P 剩 =P 额 -P 总 , the control unit adjusts the on-time duty cycle of at least one heater according to actual needs so that ΔP≤P 剩, where ΔP = P1-P2, P1 is the real-time output power of all heaters after adjustment, and P2 is the real-time output power of all heaters before adjustment. Since the clothing processing device has other electrical components in addition to the first heater and the second heater, such as a display device, a water pump, etc., before adjusting the working state of the first heater and the second heater, the power of these electrical components needs to be calculated to obtain the real-time total output power P 总 To calculate the remaining available output power P 剩 , which can ensure the real-time total output power P after adjustment 总 No more than P 额 , ensuring accurate and reliable adjustment.

[0034] In one case, the working state change of the first heater and the second heater includes starting and stopping. In order to achieve more precise control and more diverse control results, the working state change of the first heater and the second heater can be selected to include adjusting the size of the real-time output power, so that the output power of the first heater and the second heater can be adjusted steplessly. It is understandable that it is also feasible to adjust the output power of the first heater and the second heater in stages by presetting parameters, for example, under certain conditions, the heater outputs at full power, under other conditions, the heater outputs at half power, and so on.

[0035] In some cases, the priority of the first heater can be preset to be higher than that of the second heater. When the real-time output power of the first heater needs to be increased, the real-time output power of the second heater is first reduced, and then the real-time output power of the first heater is increased, so as to effectively prevent the real-time total output power P from being too high. 总 More than P 额 Similarly, when the priority of the first heater is preset to be higher than that of the second heater, when the real-time output power of the second heater needs to be increased, if the real-time total output power of the clothes processing apparatus exceeds the rated output power after the real-time output power of the second heater is increased, the increase in the real-time output power of the second heater is reduced to ensure that the real-time total output power of the clothes processing apparatus does not exceed the rated output power.

[0036] In one embodiment, the control unit can control the on-time duty ratio of the first heater and the second heater according to the voltage signal of the power circuit of the laundry processing device. It is understandable that in addition to the voltage signal, a current signal can also be used.

[0037] In order to further improve the heating efficiency, the control unit can be selected to control the on-time duty cycle of the heater by obtaining the temperature signal of the heating object of the heater. For example, the heating object of the first heater is the water in the washing machine's water tub, which needs to be heated from 20°C to 35°C. The real-time output power of the first heater can be controlled according to different temperature signals. For example, it outputs at full power in the early stage, and outputs at 75% power after heating to above 30°C, and outputs at half power after heating to above 32°C. Of course, this is just an example. In actual application, it is not necessary to follow this method. The real-time output power of the first heater can be adjusted at any time according to temperature changes. In the same way, for example, if the heating object of the second heater is the clothes in the dryer, it can also be controlled in the above manner.

[0038] It can be understood that, in the case where the clothes processing device has multiple heaters, only one or part of the heaters can be subjected to chopping control, and the other heaters can only be started and shut down, which can also achieve the purpose of the invention.

[0039] Embodiment 2:

[0040] The present invention also provides a clothing processing device, comprising at least one body, at least one heater arranged on the body, and at least one control unit, wherein the control unit adopts the control method of the clothing processing device described in any of the above embodiments to control the operation of the heater.

[0041] Specifically, in the implementation form, two or more heaters can be controlled by a control unit in one body. Only one control unit can be provided, for example, the control unit includes a control circuit board, and the control circuit board is electrically connected to all heaters respectively. More specifically, for example, a control circuit board is provided with a control chip, and is electrically connected to the first heater and the second heater respectively, so as to realize the control of the first heater and the second heater. Of course, two control chips can also be provided on a control circuit board to control the first heater and the second heater respectively. In general, a control circuit board is used, which has a high degree of integration and is easy to install.

[0042] Alternatively, multiple control circuit boards may be arranged in one body, the multiple control circuit boards communicate with each other, each control circuit board is electrically connected to the heater one-to-one, and the control circuit boards may communicate with each other through a wired or wireless network. Of course, the control unit may also include multiple control circuit boards, the multiple control circuit boards communicate with each other, and at least one control circuit board is electrically connected to at least two heaters. If the control circuit boards are divided into multiple control circuit boards, the failure of a control circuit board generally will not affect the normal use of other control circuit boards, and the maintenance cost will be reduced.

[0043] In order to obtain a better chopping effect, a fast switch for adjusting the on-time duty cycle of the heater can be electrically connected between the heater to be chopping controlled and the power supply circuit. Figure 3As shown, taking the chopping control of two heaters as an example, a first fast switch 3 for adjusting the on-time duty ratio of the first heater 1 is electrically connected between the first heater 1 and the power circuit, and the first fast switch 3 is controlled by the control unit 5. A second fast switch 4 for adjusting the on-time duty ratio of the second heater 2 is electrically connected between the second heater 2 and the power circuit, and the second fast switch 4 is controlled by the control unit 5. The first fast switch and the second fast switch can adopt common electronic switches with fast response speed such as thyristors and IGBTs. By controlling the conduction angle of the thyristors, a part of the sinusoidal voltage input from the power grid is chopped off, the average value of the output voltage is reduced, and thus the output power of the heater is reduced. It is understandable that a dual-controlled fast switch can also be used to control the on-time duty ratio of the first heater and the second heater respectively. It is understandable that the fast switch has an execution end and a control end. The execution end of the fast switch is connected in series with the power circuit and the heater to be chopping controlled, and the control end of the fast switch is electrically connected to the control unit. For other heaters that do not require chopper control, a conventional circuit switch, such as a relay, is electrically connected to the power circuit. Of course, the above-mentioned thyristor, IGBT and other electronic switches can also be used, but there is no need to control their rapid on and off.

[0044] For specific products, it can be a washing machine, with a control circuit board and two large and small washing chambers, the first heater is used to heat the large washing chamber, the second heater is used to heat the small washing chamber, and the control circuit board is electrically connected to the first heater and the second heater for control; it can also be a drying machine, with a control circuit board and two large and small drying chambers, the first heater is used to heat the large drying chamber, and the second heater is used for the small drying chamber; it can also be a washing and drying machine, with a control circuit board, a washing chamber and a drying chamber, the first heater is used to heat the washing chamber, and the second heater is used to heat the drying chamber. In addition, it can also be other types of clothing processing devices, etc.

[0045] In addition to the implementation form of only one body, two or more heaters can also be controlled by a control unit in multiple bodies. For example, the clothing processing device includes a first body and a second body, the first body is provided with a first heater, and the second body is provided with a second heater. It can also be that the first body is provided with a first heater and a second heater, and the second body is provided with a third heater. It can also be that the first body is provided with a first heater and a second heater, and the second body is provided with a third heater and a fourth heater, and so on. Specifically, in terms of the product form of the clothing processing device, it can be a combination of two washing machines, or a combination of two dryers, or a combination of a washing machine and a dryer, or a combination of multiple washing machines and / or dryers, and so on. The control unit can be designed as a control circuit board with an Internet of Things function, and the control circuit board of the first body and the control circuit board of the second body communicate through a wired or wireless network to achieve real-time control. This implementation form is more suitable for the situation where multiple machines need to be placed in different positions in one occasion, which is conducive to controlling the power load of the bus.

[0046] For other contents not described, please refer to Example 1.

[0047] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A control method for a clothes processing device, the clothes processing device comprising a control unit and at least two heaters, characterized in that: The control method includes the following contents: The control unit adjusts the on-time duty cycle of at least one heater to perform chopping control according to actual needs, so that the real-time total output power of the laundry processing device does not exceed the rated output power of the laundry processing device.

2. The control method of the clothes processing device according to claim 1, characterized in that: Before the working state of the heater is changed, according to the real-time total output power P of the laundry processing device 总 And the rated output power P 额 Calculate the remaining available output power P 剩 =P 额 -P 总 , the control unit adjusts the on-time duty cycle of at least one heater according to actual needs so that ΔP≤P 剩 , where ΔP=P1-P2, P1 is the real-time output power of all heaters after adjustment, and P2 is the real-time output power of all heaters before adjustment.

3. The control method of the clothes processing device according to claim 2, characterized in that: The working state change of the heater includes starting, stopping and adjusting the magnitude of the real-time output power.

4. The control method of the clothes processing device according to claim 1, characterized in that: The heaters that need to be chopper controlled include a first heater and a second heater. The first heater is preset to have a higher priority than the second heater. When the real-time output power of the first heater needs to be increased, the real-time output power of the second heater is first reduced, and then the real-time output power of the first heater is increased. Alternatively, the heaters that need to be chopping controlled include a first heater and a second heater, and the first heater is preset to have a higher priority than the second heater. When the real-time output power of the second heater needs to be increased, if the real-time total output power of the clothing processing device exceeds the rated output power after the real-time output power of the second heater is increased, the increase in the real-time output power of the second heater is reduced to ensure that the real-time total output power of the clothing processing device does not exceed the rated output power.

5. The control method of the clothes processing device according to claim 1, characterized in that: The control unit controls the on-time duty ratio of the heater according to a voltage signal of a power circuit of the laundry treating apparatus.

6. The control method of the clothes processing device according to claim 1, characterized in that: The control unit controls the on-time duty ratio of the heater by acquiring a temperature signal of a heating object of the heater.

7. A clothes processing device, comprising at least one body, at least two heaters arranged on the body, and at least one control unit, characterized in that: The control unit adopts the control method of the clothes processing device according to any one of claims 1 to 6 to control the operation of the heater.

8. The clothes treating device according to claim 7, characterized in that: The control unit includes a control circuit board, which is electrically connected to all the heaters respectively; or, the control unit includes multiple control circuit boards, the multiple control circuit boards communicate with each other, and each control circuit board is electrically connected one-to-one with the heater respectively; or, the control unit includes multiple control circuit boards, the multiple control circuit boards communicate with each other, and at least one control circuit board is electrically connected to at least two heaters respectively.

9. The clothes treating device according to claim 7, characterized in that: A fast switch for adjusting the on-time duty cycle of the heater is electrically connected between the heater that needs chopping control and the power supply circuit, and the fast switch is controlled by the control unit. A circuit switch is electrically connected between the heater that does not need chopping control and the power supply circuit.

10. The clothes treating device according to claim 9, characterized in that: The fast switch has an execution end and a control end. The execution end of the fast switch is connected in series with the power supply circuit and the heater that needs to be chopper controlled, and the control end of the fast switch is electrically connected to the control unit.

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