Load control device, load control method, and household appliance

Abstract

The application provides a load control device, a load control method and a household appliance. The load control device is applied to a household appliance comprising at least two loads. The load control device comprises: at least two conduction circuits, each of which is connected to one of the loads; a first power supply end, which is connected to each of the conduction circuits and is connected to one of the loads through each of the conduction circuits; and a chip, which has a signal port connected to all the conduction circuits. The chip is used to send different control signals through the signal port to turn on different loads or different numbers of loads. By arranging at least two conduction circuits at the signal port of the chip, the types of control signals allowed to pass through the at least two conduction circuits are different. Therefore, different control signals can be input to the same signal port of the chip to selectively turn on different loads or different numbers of loads. The utilization rate of the chip port is improved, and the energy loss of the load control device is reduced.

Description

Technical Field

[0001] This application belongs to the field of household appliance technology, and particularly relates to a load control device, a load control method, and a household appliance. Background Technology

[0002] Household appliances come in a wide variety, such as washing machines, refrigerators, dishwashers, and microwave ovens. Controlling the load within each appliance is crucial, directly determining its performance. The load control device in a household appliance uses a chip port to control one load, and the power supply utilizes an energy converter to transform AC mains power into the low-voltage DC power required by the load control device.

[0003] However, when multiple load controls are implemented, they occupy more chip ports, resulting in significant energy loss in the load control device. Summary of the Invention

[0004] This application provides a load control device, a load control method, and a household appliance to solve the problem that multi-channel load control requires a large number of chip ports, resulting in significant energy loss in the load control device.

[0005] This application provides a load control device for use in a household appliance, wherein the household appliance includes at least two loads, and the load control device includes:

[0006] At least two conducting circuits are connected to the load in a one-to-one correspondence.

[0007] A first power supply terminal is connected to each of the aforementioned conductive circuits and, through each of the aforementioned conductive circuits, is connected to a load; and

[0008] The chip has a signal port that connects to all the conducting circuits. The chip is used to send different control signals through the signal port to conduct different loads or different numbers of loads.

[0009] Optionally, the at least two loads include a first load and a second load, and the at least two conducting circuits include:

[0010] The first conducting circuit includes a first switching circuit and a first capacitor. The first switching circuit includes a first connection terminal, a second connection terminal and a control terminal. The first connection terminal and the second connection terminal are respectively connected to the first load and the first power supply terminal. The control terminal is connected to one end of the first capacitor and the other end of the first capacitor is connected to the signal port.

[0011] The second conducting circuit includes a second switching circuit, a first resistor, a second resistor, and a second capacitor. The second switching circuit includes a first connection terminal, a second connection terminal, and a control terminal. The first connection terminal and the second connection terminal are respectively connected to the second load and the first power supply terminal. The control terminal is connected to one end of the first resistor, and the other end of the first resistor is connected to the signal port. One end of the second resistor is connected to the control terminal, and the other end of the second resistor is grounded. One end of the second capacitor is connected to the control terminal, and the other end of the second capacitor is grounded.

[0012] Optionally, both the first switching circuit and the second switching circuit include:

[0013] A switching device, one end of which is connected to the first connection terminal and the second connection terminal respectively;

[0014] The third resistor is connected at one end to the other end of the switching device;

[0015] The fourth resistor has one end connected to the second power source and the other end connected to the other end of the third resistor.

[0016] The transistor has its first end connected to the other end of the fourth resistor, its second end grounded, and its third end connected to the control terminal.

[0017] Optionally, when the chip sends a level signal through the signal port, the level signal is divided by the first resistor and the second resistor to generate a first voltage at the third terminal of the transistor in the second switching circuit, so as to turn on the transistor in the second switching circuit and turn on the second load.

[0018] Optionally, when the chip sends a first pulse signal with a first frequency through the signal port, and when the third terminal of the transistor in the first switching circuit generates a second voltage, the transistor in the first switching circuit is turned on, and the first load is turned on.

[0019] Optionally, when the chip sends a second pulse signal with a second frequency through the signal port, the second frequency is greater than the first frequency. The transistor in the first switching circuit is turned on, and the second capacitor is charged, causing a third voltage to be generated at the third terminal of the transistor in the second switching circuit, thus turning on the transistor and simultaneously turning on both the first load and the second load. This application also provides a load control method applied to a chip, the chip including a signal port, the load control method including:

[0020] Obtain control commands from at least two loads;

[0021] Configure control signals according to the control instructions;

[0022] Different control signals are sent through the signal port to activate different loads or different numbers of loads.

[0023] Optionally, configuring the control signal according to the control command includes:

[0024] If the control command is a first control command, then the control signal is configured as a level signal;

[0025] If the control command is a second control command, then the control signal is configured as a first pulse signal with a first frequency;

[0026] If the control command is a third control command, then the control signal is configured as a second pulse signal with a second frequency, the second frequency being greater than the first frequency.

[0027] Optionally, the at least two loads include a first load and a second load;

[0028] The step of sending different control signals through the signal port to activate different loads or different numbers of loads includes:

[0029] If the level signal is sent through the signal port, the second load is turned on;

[0030] If the first pulse signal is sent through the signal port, the first load is turned on;

[0031] If the second pulse signal is sent through the signal port, both the first load and the second load are simultaneously turned on.

[0032] This application also provides a household appliance, including:

[0033] At least two loads; and

[0034] Load control device, as described in any of the preceding items.

[0035] In the load control device, load control method, and household appliance provided in the embodiments of this application, at least two conduction circuits are set at a signal port of the chip. The types of control signals allowed by the at least two conduction circuits are different, so different control signals can be input to the same signal port of the chip to selectively conduct different loads or different numbers of loads, thereby improving the utilization rate of the chip port and reducing the energy loss of the load control device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0038] Figure 1 A schematic diagram of the structure of a household appliance provided in an embodiment of this application.

[0039] Figure 2 for Figure 1 The diagram shows a first structural schematic of a load control device in a household appliance.

[0040] Figure 3 for Figure 1 The diagram shows a second structural schematic of the load control device in a household appliance.

[0041] Figure 4 for Figure 1 The diagram shows a third structural design of the load control device in a household appliance.

[0042] Figure 5 This is a schematic diagram of the structure of the first switching circuit provided in an embodiment of this application.

[0043] Figure 6 This is a schematic diagram of the structure of the second switching circuit provided in an embodiment of this application.

[0044] Figure 7 The waveform diagrams of the level signal and the first pulse signal provided in the embodiments of this application are shown.

[0045] Figure 8 The waveform of the second pulse signal provided in the embodiments of this application.

[0046] Figure 9 This is a flowchart illustrating the load control method provided in an embodiment of this application. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] To address the problem that existing multi-load systems require numerous chip ports, resulting in significant energy loss in load control devices, this application provides a load control device, a load control method, and a household appliance, which will be described below in conjunction with the accompanying drawings.

[0049] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a household appliance provided in an embodiment of this application. This application provides a household appliance 1, which can be a washing machine, refrigerator, dishwasher, or microwave oven, etc. For example, when the household appliance 1 is a washing machine, the load inside the washing machine may include a motor that drives the inner drum to rotate and a display module for display, etc. Controlling these loads inside the washing machine is crucial, directly determining the performance of the washing machine. The power supply method for the washing machine utilizes power conversion to convert AC mains power into the low-voltage DC power required by the loads inside the washing machine. However, when multiple loads are controlled, it occupies many chip ports, resulting in significant energy loss in the load control device.

[0050] To address the aforementioned issues, this application provides an improvement to the load control device, which will be described below.

[0051] Please combine Figure 1 And see Figure 2 , Figure 2 for Figure 1The diagram shows a first structural schematic of a load control device in a household appliance. This application also provides a load control device 10, which can be used to control parameters of the load, such as the on-time and on-duration, to enable the household appliance 1 to perform different functions. The household appliance 1 may include at least two loads 11 and a load control device 10. The load control device 10 may include at least two conducting circuits 12, a first power supply terminal 13, and a chip 14. Different loads 11 play different roles in the household appliance 1. For example, when the household appliance 1 is a refrigerator, the loads 11 may be a compressor, a light, a display screen, etc. The compressor is used to cool the refrigerator, the light is used to illuminate the space inside the refrigerator for the user to view, and the display screen is used to display the refrigerator's working status, etc. The conducting circuits 12 are connected one-to-one with the loads 11. The first power supply terminal 13 is connected to each conducting circuit 12 and is connected to a load 11 through each conducting circuit 12. The first power supply terminal 13 can be the mains power input, that is, the port through which mains power is introduced into the load control device 10. Chip 14 has a signal port O, which connects to all the conducting circuits 12, meaning that all the conducting circuits 12 can be connected in parallel. Chip 14 is used to send different control signals through signal port O to conduct different loads 11 or different numbers of loads 11. For example, when at least two loads 11 are included, the different loads 11 can be any one of the two loads 11, and the different number of loads 11 can be one load 11 or two loads 11.

[0052] In the load control device 10 provided in this application embodiment, at least two conduction circuits 12 are provided at a signal port O of chip 14. The types of control signals allowed by the at least two conduction circuits 12 are different, so different control signals can be input to the same signal port O of chip 14 to selectively conduct different loads 11 or different numbers of loads 11, thereby improving the utilization rate of chip 14 port and reducing the energy loss of load control device 10.

[0053] To more clearly illustrate the working principle and process of the load control device 10 in this embodiment, an example of at least two loads 11 is used. For instance, the at least two loads 11 may include a first load 11a and a second load 11b. Correspondingly, the at least two conducting circuits 12 include a first conducting circuit 12a and a second conducting circuit 12b.

[0054] For example, please combine Figure 1 and Figure 2 And see Figure 3 , Figure 3 for Figure 1The diagram shows a second structural representation of a load control device in a household appliance. The first conducting circuit 12a may include a first switching circuit 120 and a first capacitor C1. The first switching circuit 120 may include a first connection terminal, a second connection terminal, and a control terminal. The first connection terminal and the second connection terminal are respectively connected to the first load 11a and the first power supply terminal 13. For example, the first connection terminal can be connected to the first load 11a, and the second connection terminal can be connected to the first power supply terminal 13. Alternatively, the first connection terminal can be connected to the first power supply terminal 13, and the second connection terminal can be connected to the first load 11a. One end of the first capacitor C1 is connected to the control terminal of the first switching circuit 120, and the other end of the first capacitor C1 is connected to signal port O.

[0055] For example, the second conducting circuit 12b may include a second switching circuit 121, a first resistor R1, a second resistor R2, and a second capacitor C2. The second switching circuit 121 may also include a first connection terminal, a second connection terminal, and a control terminal. The first and second connection terminals are respectively connected to the second load 11b and the first power supply terminal 13. For example, the first connection terminal can be connected to the second load 11b, and the second connection terminal can be connected to the first power supply terminal 13. Alternatively, the first connection terminal can be connected to the first power supply terminal 13, and the second connection terminal can be connected to the second load 11b. The control terminal can be connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to signal port O. One end of the second resistor R2 is connected to the control terminal of the second switching circuit 121, and the other end of the second resistor R2 is grounded (GND). One end of the second capacitor C2 is connected to the control terminal of the second switching circuit 121, and the other end of the second capacitor C2 is grounded (GND).

[0056] The first switching circuit 120 and the second switching circuit 121 can be configured as the same circuit. For example, please refer to the following: Figures 1 to 3 And see Figure 4 , Figure 4 for Figure 1 The diagram shows a third possible structure of the load control device in a household appliance. Both the first switching circuit 120 and the second switching circuit 121 may include a switching device K, a third resistor R3, a fourth resistor R4, and a transistor Q. One end of the switching device K is connected to both the first and second connection terminals, and the other end of the switching device K is connected to one end of the third resistor R3. One end of the fourth resistor R4 is connected to the second power supply VCC, and the other end of the fourth resistor R4 is connected to the other end of the third resistor R3. The first end of the transistor Q is connected to the other end of the fourth resistor R4, the second end of the transistor Q is grounded (GND), and the third end of the transistor Q is connected to the control terminal.

[0057] It should be noted that the neutral wire N and the live wire L can be led out from the first power supply terminal 13 to facilitate the connection of the load 11 or the conducting circuit 12. For example, one pin or input port of the first load 11a can be connected to the neutral wire N, and the other pin or input port of the first load 11a can be connected to the switching device K. The first connection terminal of one end of the switching device K can be connected to the first load 11a, and the second connection terminal of one end of the switching device K can be connected to the live wire L. Thus, the conduction of the first load 11a can be controlled by the first conducting circuit 12a and the chip 14. Correspondingly, the connection method of the second load 11b to the first power supply terminal 13 is the same, and can be referred to the description of the connection of the first load 11a, which will not be repeated here.

[0058] For example, the switching device K can be a relay or a thyristor, which can be selected as needed, and the first switching circuit 120 and the second switching circuit 121 can be adjusted accordingly.

[0059] For example, if the switching device K can be a thyristor, then the circuit structures of the first switching circuit 120 and the second switching circuit 121 are as follows: Figure 4 As shown, simply replace the switching device K with a thyristor.

[0060] For example, the switching device K can be a relay. Please refer to... Figures 1 to 4 And see Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of the first switching circuit provided in an embodiment of this application. Figure 6This is a schematic diagram of the second switching circuit provided in an embodiment of this application. The first switching circuit 120 may include a first relay RY1, a first diode D1, a fifth resistor R5, a third capacitor C3, a sixth resistor R6, and a transistor Q. The first output terminal of the first relay RY1 is connected to the power supply live wire L, the second output terminal of the first relay RY1 is connected to the first load 11a, the first input terminal of the first relay RY1 is connected to the cathode of the first diode D1, and the second input terminal of the first relay RY1 is connected to the anode of the first diode D1. The fifth resistor R5 is connected in parallel with the first diode D1, and the third capacitor C3 is connected in parallel with the fifth resistor R5, with one end of the third capacitor C3 grounded to GND. One end of the sixth resistor R6 is connected to the other end of the third capacitor C3, and the other end of the sixth resistor R6 is connected to the first terminal of the transistor Q. The second terminal of the transistor Q is connected to the second power supply VCC, and the third terminal of the transistor Q is connected to the input terminal of the first switching circuit 120. The second switching circuit 121 may include a second relay RY2, a second diode D2, and a transistor Q. The first output terminal of the second relay RY2 is connected to the power supply live wire L, and the second output terminal of the second relay RY2 is connected to the second load 11b. The first input terminal of the second relay RY2 is connected to the cathode of the second diode D2, and the second input terminal of the second relay RY2 is connected to the anode of the second diode D2. The anode of the second diode D2 is also grounded (GND). The first terminal of the transistor Q is connected to the cathode of the second diode D2, the second terminal of the transistor Q is connected to the second power supply VCC, and the third terminal of the transistor Q is connected to the input terminal of the second switching circuit 121.

[0061] It should be noted that, since the types of control signals allowed by the first conducting circuit 12a and the second conducting circuit 12b are different, and since a thyristor is different from a relay (a relay can be equivalent to a thyristor with synchronous triggering drive), when the switching device K is a thyristor, the first switching circuit 120 and the second switching circuit 121 can be configured as the same circuit. When the switching device K is a relay, the configurations of the first switching circuit 120 and the second switching circuit 121 are different.

[0062] It should be noted that the second power supply VCC is different from the first power supply terminal 13. The first power supply terminal 13 can be a mains power supply port, while the second power supply VCC can be a DC regulated power supply.

[0063] The conduction status of the first load 11a and the second load 11b is determined by the type of control signal. Please refer to... Figures 1 to 6 And see Figure 7 and Figure 8 , Figure 7 The waveforms of the level signal and the first pulse signal provided in the embodiments of this application are shown. Figure 8 The waveform of the second pulse signal provided in the embodiments of this application.

[0064] In the first scenario, when chip 14 sends a level signal (e.g., a high-level signal) through signal port O, the level signal is divided by the first resistor R1 and the second resistor R2, generating a first voltage at the third terminal of transistor Q in the second switching circuit 121. This results in a high-level signal at the third terminal of transistor Q in the second switching circuit 121, turning on transistor Q. At this time, the trigger terminal of the switching device K in the second switching circuit 121 is also high-level, turning on the switching device K. Consequently, the power supply line L is connected to the second load 11b, thus turning on the second load 11b. It should be noted that in this scenario, for the first conducting circuit 12a, due to the presence of the first capacitor C1, the level signal is a DC signal. Since a DC signal cannot pass through the first capacitor C1, the first conducting circuit 12a does not operate, meaning the first load 11a is not turned on.

[0065] In the second scenario, when chip 14 sends a first pulse signal with a first frequency through signal port O, and when the third terminal of transistor Q in the first switching circuit 120 generates a second voltage (which can also be a high-level signal), the first pulse signal passes through the first capacitor C1. The third terminal of transistor Q in the first switching circuit 120 generates the second voltage, turning on transistor Q and thus turning on the first load 11a. The first pulse signal passes through the first capacitor C1 and outputs a pulse width modulation (PWM) signal. Transistor Q in the first switching circuit 120 is turned on when it is high and turned off when it is low. When transistor Q in the first switching circuit 120 is turned on, the switching device K in the first switching circuit 120 is turned on, thereby energizing the first load 11a. It should be noted that in this case, the second power supply VCC charges the second capacitor C2 through the first resistor R1. However, since the first frequency of the first pulse signal is lower than the preset frequency, the voltage charged on the second capacitor C2 is insufficient to make the internal voltage division of the transistor Q in the second switching circuit 121 higher than the conduction voltage of the transistor Q. At this time, the transistor Q in the second switching circuit 121 does not conduct, and therefore the second load 11b does not work.

[0066] In the third scenario, when chip 14 sends a second pulse signal with a second frequency (greater than the first frequency) through signal port O, the second pulse signal passes through the first capacitor C1 and turns on transistor Q of the first switching circuit 120. Simultaneously, the second capacitor C2 charges, generating a third voltage at the third terminal of transistor Q in the second switching circuit 121, thus turning on transistor Q and simultaneously turning on the first load 11a and the second load 11b. In other words, when chip 14 sends the second pulse signal through signal port O, it can simultaneously turn on the first load 11a and the second load 11b. Since the second frequency of the second pulse signal is greater than the first frequency of the first pulse signal, the second pulse signal still passes through the first capacitor C1. At this time, the switching device K in the first switching circuit 120 is turned on, and the first load 11a is turned on. The second frequency of the second pulse signal is relatively large. At this time, the second capacitor C2 is charged to a certain high voltage. The voltage of the transistor Q in the second switching circuit 121 causes the transistor Q to conduct, thereby turning on the switching device K in the second switching circuit 121, and turning on the second load 11b.

[0067] It should be noted that the second capacitor C2 should be larger than the first capacitor C1; for example, the second capacitor C2 can be several times larger than the first capacitor C1. Furthermore, the first frequency of the first pulse signal and the second frequency of the second pulse signal can be between the passing frequency of the first capacitor C1. The transistor Q in the second switching circuit 121 can be matched with the first voltage divider resistor R1 and the second voltage divider resistor R2.

[0068] It should be noted that, for the chip 14 in this embodiment of the application, sending different control signals through signal port O to conduct different loads 11 or different numbers of loads 11, the chip 14 can send control signals in any of the three cases mentioned above. The chip 14 can also send control signals in the fourth, fifth, sixth, and seventh cases. In the fourth case, the chip 14 can send a level signal and a first pulse signal in a time-division manner to conduct the second load 11b and the first load 11a in a time-division manner. The conduction order of the first load 11a and the second load 11b is not limited and can be set as needed. In the fifth case, the chip 14 can send a first pulse signal and a second pulse signal in a time-division manner to conduct the first load 11a in a time-division manner and simultaneously conduct the first load 11a and the second load 11b. In the sixth case, the chip 14 can send a level signal and a second pulse signal in a time-division manner to conduct the second load 11b in a time-division manner and simultaneously conduct the first load 11a and the second load 11b. In the seventh scenario, chip 14 can send a level signal, a first pulse signal, and a second pulse signal in a time-division manner to simultaneously turn on the first load 11a and the second load 11b. The signal conversion and operation process can be referred to the above description and will not be repeated here. The signal transmission order in the fourth, fifth, sixth, and seventh scenarios is not limited here and can be set according to the functions of the household appliance 1.

[0069] To more clearly illustrate the operation of the load control device 10 in this application embodiment, the following description will be provided from the perspective of load control method.

[0070] Please combine Figures 1 to 8 And see Figure 9 , Figure 9 This is a flowchart illustrating the load control method provided in an embodiment of this application. This application also provides a load control method applied to a chip, which can be referenced... Figures 1 to 8 As described above, the chip may include signal port O. Load control methods include:

[0071] 101. Obtain control commands for at least two loads.

[0072] For household appliance 1, different functions require the cooperation of different loads 11. Chip 14 first needs to obtain control instructions for at least two loads 11 in household appliance 1. For example, the at least two loads 11 may include a first load 11a and a second load 11b. The control instructions may include a first control instruction, a second control instruction, and a third control instruction. The first control instruction may be a control instruction to control the second load 11b to be turned on, the second control instruction may be a control instruction to control the first load 11a to be turned on, and the third control instruction may be a control instruction to simultaneously turn on the first load 11a and the second load 11b.

[0073] 102. Configure control signals according to control instructions.

[0074] For different conduction states of load 11, chip 14 will receive different control commands and then configure corresponding control signals according to the different control commands. For example, the control signals may include a level signal, a first pulse signal with a first frequency, and a second pulse signal with a second frequency, where the second frequency is greater than the first frequency. When the control command is the first control command, the control signal can be configured as a level signal. When the control command is the second control command, the control signal can be configured as the first pulse signal. When the control command is the third control command, the control signal can be configured as the second pulse signal.

[0075] 103. Send different control signals through the signal port to conduct different loads or different numbers of loads.

[0076] Taking a household appliance 1 with a first load 11a and a second load 11b as an example, the following explanation is provided. A conduction circuit is also provided between the signal port O of the chip 14 and the load 11. For example, a first conduction circuit 12a can be provided between the signal port O of the chip 14 and the first load 11a, and a second conduction circuit 12b can be provided between the signal port O of the chip 14 and the second load 11b. The structural composition of the first conduction circuit 12a and the second conduction circuit 12b can be referred to the above description and will not be repeated here. Different control signals are sent through the unified signal port O of the chip 14 to control the conduction of different loads 11 or different numbers of loads 11, thereby meeting the conduction requirements of different loads in the household appliance 1.

[0077] If a level signal is sent through signal port O, the second load 11b will be turned on. A DC signal can pass through the second conducting circuit 12b to turn on the second load 11b. However, due to the presence of the first capacitor C1 in the first conducting circuit 12a, the DC signal cannot pass through the first conducting circuit 12a, and therefore the first load 11a cannot be turned on.

[0078] If a first pulse signal of the first frequency is sent through signal port O, the pulse signal can pass through the first capacitor C1, thereby turning on the first load 11a. The second capacitor C2 of the second conducting circuit 12b has insufficient charging voltage to turn on the transistor Q of the second switching circuit 121; therefore, the second load 11b does not conduct.

[0079] If a second pulse signal with a second frequency is sent through signal port O, and this second frequency is greater than the first frequency, the pulse signal can still pass through the first capacitor C1, thereby turning on the first load 11a. The higher frequency of the second pulse signal results in a higher charging voltage for the second capacitor C2, which in turn turns on the transistor Q of the second switching circuit 121. Therefore, the second load 11b also turns on. In other words, when the second pulse signal is sent through signal port O, both the first load 11a and the second load 11b can be turned on simultaneously.

[0080] If the level signal and the first pulse signal are sent in a time-division manner through signal port O, the first load 11a and the second load 11b can be turned on in a time-division manner.

[0081] If a level signal and a second pulse signal are sent through signal port O in a time-division manner, the second load 11b can be turned on in a time-division manner, and the first load 11a and the second load 11b can be turned on simultaneously.

[0082] If the first pulse signal and the second pulse signal are sent through signal port O in a time-division manner, the first load 11a can be turned on in a time-division manner, and the first load 11a and the second load 11b can be turned on simultaneously.

[0083] If a level signal, a first pulse signal, and a second pulse signal are sent through signal port O in a time-division manner, the first load 11a and the second load 11b can be turned on in a time-division manner, or the first load 11a and the second load 11b can be turned on simultaneously.

[0084] In the load control device 10, load control method, and household appliance 1 provided in the embodiments of this application, at least two conduction circuits 12 are provided at the signal port O of the chip 14. The types of control signals allowed by the at least two conduction circuits 12 are different, so different control signals can be input to the same signal port O of the chip 14 to selectively conduct different loads 11 or different numbers of loads 11, thereby improving the utilization rate of the chip 14 port and reducing the energy loss of the load control device 10.

[0085] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0086] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0087] The load control device, load control method, and household appliance provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A load control device, characterized by, Applied to household appliances, the household appliances including at least two loads, the load control device includes: At least two conducting circuits are connected to the load in a one-to-one correspondence. A first power supply terminal is connected to each of the aforementioned conductive circuits and, through each of the aforementioned conductive circuits, is connected to a load; and The chip has a signal port that connects to all the conducting circuits. The chip is used to send different control signals through the signal port to conduct different loads or different numbers of loads. Wherein, the at least two loads include a first load and a second load, and the at least two conducting circuits include: The first conducting circuit includes a first switching circuit and a first capacitor. The first switching circuit includes a first connection terminal, a second connection terminal and a control terminal. The first connection terminal and the second connection terminal are respectively connected to the first load and the first power supply terminal. The control terminal is connected to one end of the first capacitor and the other end of the first capacitor is connected to the signal port. The second conducting circuit includes a second switching circuit, a first resistor, a second resistor, and a second capacitor. The second switching circuit includes a first connection terminal, a second connection terminal, and a control terminal. The first connection terminal and the second connection terminal are respectively connected to the second load and the first power supply terminal. The control terminal is connected to one end of the first resistor, and the other end of the first resistor is connected to the signal port. One end of the second resistor is connected to the control terminal, and the other end of the second resistor is grounded. One end of the second capacitor is connected to the control terminal, and the other end of the second capacitor is grounded.

2. The load control device of claim 1, wherein, Both the first switching circuit and the second switching circuit include: A switching device, one end of which is connected to the first connection terminal and the second connection terminal respectively; The third resistor is connected at one end to the other end of the switching device; The fourth resistor has one end connected to the second power source and the other end connected to the other end of the third resistor. The transistor has its first end connected to the other end of the fourth resistor, its second end grounded, and its third end connected to the control terminal.

3. The load control device of claim 2, wherein, When the chip sends a level signal through the signal port, the level signal is divided by the first resistor and the second resistor, generating a first voltage at the third terminal of the transistor in the second switching circuit, so as to turn on the transistor in the second switching circuit and turn on the second load.

4. The load control device of claim 2 or 3, wherein, When the chip sends a first pulse signal with a first frequency through the signal port, and when the third terminal of the transistor in the first switching circuit generates a second voltage, the transistor in the first switching circuit is turned on, and the first load is turned on.

5. The load control device of claim 4, wherein, When the chip sends a second pulse signal with a second frequency through the signal port, the second frequency is greater than the first frequency. The transistor of the first switching circuit is turned on, and the second capacitor is charged, so that the third terminal of the transistor of the second switching circuit generates a third voltage and turns on the transistor of the second switching circuit, thereby simultaneously turning on the first load and the second load.

6. A load control method employing the load control device according to any one of claims 1 to 5, characterized by, Applied to a chip, the chip including signal ports, the load control method includes: Obtain control commands from at least two loads; Configure control signals according to the control instructions; Different control signals are sent through the signal port to activate different loads or different numbers of loads.

7. The load control method according to claim 6, characterized in that, The step of configuring control signals according to the control command includes: If the control command is a first control command, then the control signal is configured as a level signal; If the control command is a second control command, then the control signal is configured as a first pulse signal with a first frequency; If the control command is a third control command, then the control signal is configured as a second pulse signal with a second frequency, the second frequency being greater than the first frequency.

8. The load control method according to claim 7, characterized in that, The at least two loads include a first load and a second load; The step of sending different control signals through the signal port to activate different loads or different numbers of loads includes: If the level signal is sent through the signal port, the second load is turned on; If the first pulse signal is sent through the signal port, the first load is turned on; If the second pulse signal is sent through the signal port, both the first load and the second load are simultaneously turned on.

9. A domestic appliance characterized in that, include: At least two loads; as well as A load control device, as described in any one of claims 1-5.

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