Electric appliance system

Abstract

The utility model provides an electric appliance system, relates to the technical field of household appliances, and aims to enable the maximum power line current of the household appliances to be kept within the range specified by the national standard. The electrical system comprises a power protection device, a first electrical load and a second electrical load. The power protection device comprises a master control relay and N slave control relays. The main control relay comprises a main contact, a first branch contact, N second branch contacts and a first switch dialing piece, and the first switch dialing piece is connected with the main contact and is also connected with any one of the N second branch contacts. The first branch contact is connected with a first electric load, and the first electric load is also connected with the zero line. The slave control relay comprises a first contact, a second contact and a second switch dialing piece, and the second switch dialing piece is connected with the first contact. And each second contact in the N slave control relays is connected with N second electric loads. The first contacts of the N slave control relays are respectively connected with the N second branch contacts of the master control relay.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an electrical appliance system. Background Art

[0002] People cannot live without household appliances in their daily lives. The national standard stipulates that the maximum power line current of household appliances is 16A.

[0003] In order to meet the personalized needs of different users, manufacturers often integrate loads with different functions into home appliances. When all these loads are enabled, the power line current may exceed the 16A specified by the national standard.

[0004] In this case, it is very likely to cause the circuit breaker to trip, which will greatly affect the user experience. Utility Model Content

[0005] The embodiment of the utility model provides an electrical appliance system, which is intended to enable the maximum power line current of household appliances to be maintained within the range specified by national standards.

[0006] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0007] The electrical system provided by the utility model comprises: a first electrical load, a second electrical load and a power protection device, wherein the power protection device comprises a master control relay and N slave control relays. The master control relay comprises a main contact, a first branch contact, N second branch contacts and a first switch paddle, wherein the first end of the first switch paddle is connected to the main contact, and the second end of the first switch paddle is connected to any one of the N second branch contacts. The main contact is connected to the live wire. The first branch contact is connected to the first end of the first electrical load, and the second end of the first electrical load is connected to the neutral wire. The slave control relay comprises a first contact, a second contact and a second switch paddle, wherein the first end of the second switch paddle is connected to the first contact. Each second contact of the N slave control relays is connected to the first end of the N second electrical loads, and the second end of the second electrical loads is connected to the neutral wire. The first contacts of the N slave control relays are respectively connected to the N second branch contacts of the master control relay. N is a positive integer greater than or equal to 1.

[0008] Since the first branch contact is connected to the first end of the first electrical load, and the second end of the first electrical load is connected to the neutral line, the first electrical load is controlled by the master control relay, and the first electrical load will only operate when the second end of the switch paddle of the master control relay is connected to the first branch contact. Since the second end of the second switch paddle of each slave control relay is not connected to the second contact, the second switch paddle of each slave control relay is in a normally open state, even if the second end of the switch paddle in the master control relay is connected to any one of the N second branch contacts, the corresponding second electrical load will not operate before the second switch paddle of the corresponding slave control relay is not connected to the second contact. The N second electrical loads are controlled by the master control relay and the slave control relay, and the first electrical load is controlled by the master control relay. Since the second end of the first switch paddle can only be connected to one branch contact, it is ensured that multiple second electrical loads will not work at the same time in the circuit, or the first electrical load and the second electrical load will not work at the same time, which reduces the possibility of the power line current exceeding the national standard to a certain extent.

[0009] As a possible implementation, the power protection device includes a master control relay and a slave control relay. The master control relay includes a main contact, a first branch contact, a second branch contact, and a first switch paddle. The second end of the first switch paddle of the master control relay is connected to the second branch contact. The slave control relay includes a first contact, a second contact, and a second switch paddle, and the first end of the second switch paddle of the slave control relay is connected to the first contact. The first branch contact is connected to the first end of the first electrical load, and the second end of the first electrical load is connected to the neutral line. The second branch contact is connected to the first contact of the slave control relay, the second contact of the slave control relay is connected to the first end of the second electrical load, and the second end of the second electrical load is connected to the neutral line.

[0010] As a possible implementation, the power protection device further includes a controller. The controller is connected to the master control relay and the N slave control relays. The controller is configured to control the second end of the first switch paddle to be connected to the first branch contact. Alternatively, the second end of the first switch paddle is controlled to be connected to one of the N second branch contacts, and the second end of the second switch paddle of the slave control relay connected to the selected second branch contact among the N slave control relays is controlled to be connected to the second contact. The selected second branch contact is the second branch contact connected to the second end of the first switch paddle.

[0011] As a possible implementation manner, the first electrical load includes a plurality of electrical devices connected in series and / or a plurality of electrical devices connected in parallel.

[0012] As a possible implementation manner, the second electrical load includes a plurality of electrical devices connected in series and / or a plurality of electrical devices connected in parallel.

[0013] As a possible implementation, the electrical system is an electrical appliance, the first electrical load is at least one electrical functional component in the electrical appliance, and the second electrical load is at least one electrical functional component of the electrical appliance. Alternatively, the electrical system is a collection of multiple electrical appliances, the first electrical load is at least one electrical appliance in the collection of multiple electrical appliances, and the second electrical load is at least one electrical appliance in the collection of multiple electrical appliances.

[0014] The utility model also provides an electrical system, comprising: a first electrical load, a second electrical load and a power protection device, wherein the power protection device comprises a first protection circuit and a second protection circuit. The first protection circuit comprises a first control device and a first controlled device. The first input end of the first protection circuit is connected to the first signal input end, the second input end of the first protection circuit is connected to the second signal input end, and the first control device is connected between the first input end and the second input end of the first protection circuit. The first output end of the first protection circuit is connected to the first voltage end, the second output end of the first protection circuit is connected to the first electrical load, the first controlled device is connected between the first output end and the second output end of the first protection circuit, and the first controlled device is configured to be turned on when the first control device is turned on. The first control device is configured to be turned on when the voltage of the first signal output from the first signal input end is greater than the voltage of the second signal output from the second signal input end. The second protection circuit comprises a second control device and a second controlled device, the first input end of the second protection circuit is connected to the second signal input end, the second input end of the second protection circuit is connected to the first signal input end, and the second control device is connected between the first input end and the second input end of the second protection circuit. The first output terminal of the second protection circuit is connected to the second voltage terminal, the second output terminal of the second protection circuit is connected to the second electrical load, the second controlled device is connected between the first output terminal and the second output terminal of the second protection circuit, and the second controlled device is configured to be turned on when the second control device is turned on. The second control device is configured to be turned on when the voltage of the first signal outputted from the first signal input terminal is less than the voltage of the second signal outputted from the second signal input terminal.

[0015] As a possible implementation, the first control device is a first photodiode, the first controlled device is a first photoelectric switch tube, the anode of the first photodiode is electrically connected to the first input terminal of the first protection circuit, the cathode of the first photodiode is electrically connected to the second input terminal of the first protection circuit. The first pole of the first photoelectric switch tube is electrically connected to the first output terminal of the first protection circuit, and the second pole of the first photoelectric switch tube is electrically connected to the second output terminal of the first protection circuit.

[0016] As a possible implementation, the second control device is a second photodiode, the second controlled device is a second photoelectric switch tube, the anode of the second photodiode is electrically connected to the second input terminal of the second protection circuit, the cathode of the second photodiode is electrically connected to the first input terminal of the second protection circuit. The first pole of the second photoelectric switch tube is electrically connected to the first output terminal of the second protection circuit, and the second pole of the second photoelectric switch tube is electrically connected to the second output terminal of the second protection circuit.

[0017] As a possible implementation, the electrical system is an electrical appliance, the first electrical load is at least one electrical functional component in the electrical appliance, and the second electrical load is at least one electrical functional component of the electrical appliance. Alternatively, the electrical system is a collection of multiple electrical appliances, the first electrical load is at least one electrical appliance in the collection of multiple electrical appliances, and the second electrical load is at least one electrical appliance in the collection of multiple electrical appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0019] Figure 1 A schematic diagram of the composition of a power protection device provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the composition of a main control relay provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the composition of a slave-controlled relay provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of another power protection device provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of another main control relay provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of another power protection device provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of another power protection device provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of another power protection device provided in an embodiment of the present application;

[0027] Fig. 9A schematic diagram of another power protection device provided in an embodiment of the present application;

[0028] Fig.10 A schematic diagram of another power protection device provided in an embodiment of the present application;

[0029] Fig.11 A schematic diagram of another power protection device provided in an embodiment of the present application;

[0030] Fig.12 A schematic diagram of the composition of another power protection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, when describing the pipeline, the "connected" and "connection" used in the present utility model have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0035] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0036] Household appliances are indispensable in people's daily life. The copper core wire specified in the national standard GB4706.1-1992 / 1998 has a cross-sectional area of ​​1.5mm 2 In this case, the current allowed to flow for a long time is about 16A, and household appliances usually use wires with a cross-sectional area of ​​1.5mm 2 Copper core wire for connection.

[0037] However, as people's living standards improve, the types and quantities of household appliances are increasing. For example, the living room is equipped with high-definition TVs, projectors, Bluetooth speakers, computers, massage chairs and other household appliances. Another example is the kitchen is equipped with dishwashers, electric ovens, refrigerators, air fryers and other household appliances.

[0038] In addition, in order to meet the personalized needs of different users, manufacturers often integrate loads with different functions in home appliances. For example, the dishwasher is integrated with the function of a Bluetooth speaker and can act as a music player. For another example, the oven is integrated with the function of taking photos or recording videos, so that users can observe the process of food gradually becoming cooked, and provide materials for users who are happy to share their lives. However, if all the functions of the home appliance are turned on, the actual power will increase. Under the condition of stable voltage, the current will increase with the increase in the number of home appliance functions turned on.

[0039] In such a case, the current in the power cord may exceed the national standard of 16A, causing tripping, which greatly affects the user experience. In severe cases, it may even cause damage to the circuit, posing a potential threat to the user's health.

[0040] In view of this, an embodiment of the utility model provides an electrical system, including a power protection device, which is intended to keep the maximum power line current of the household appliance within the range specified by the national standard. For example, as shown in 1, Figure 1 The composition of the power protection device is shown.

[0041] Reference Figure 1 , the power protection device includes a main control relay 1. Exemplarily, in combination Figure 2 , Figure 2The main control relay 1 includes a main contact 11, a first branch contact 12, N second branch contacts 13 and a first switch paddle 14. The second branch contact 13 is Figure 2 The second branch contact 13a, the second branch contact 13b, the second branch contact 12n, etc., a total of n contacts, for the convenience of illustration, only Figure 2 The second branch contact 13a, the second branch contact 13b, and the second branch contact 12n are drawn, and the remaining N-3 second branch contacts are represented by ellipsis.

[0042] The first end of the first switch paddle 14 is connected to the main contact 11, and the second end of the first switch paddle 14 is connected to any one of the N second branch contacts 13, for example, Figure 2 The second end of the first switch paddle 14 is connected to the second branch contact 13a of the N second branch contacts 13. The main contact 11 is connected to the live wire 5. The first branch contact 12 is connected to the first end of the first electrical load 3, and the second end of the first electrical load 3 is connected to the neutral wire 6.

[0043] The power protection device includes a slave control relay 2. Figure 3 , Figure 3 The slave-controlled relay 2 includes a first contact 21 , a second contact 22 and a second switch paddle 23 , wherein a first end of the second switch paddle 23 is connected to the first contact 21 .

[0044] Each second contact 22 of the N slave control relays 2 is connected to the first end of the N second electrical loads 4, and the second end of the second electrical loads 4 is connected to the neutral line 6. The first contacts 21 of the N slave control relays 2 are respectively connected to the N second branch contacts 13 of the master control relay 1. Figure 1 The first slave control relay 2a, the second slave control relay 2b and the third slave control relay 2n are shown, and the remaining N-3 slave control relays are indicated by ellipsis. Figure 1 The second electrical load 4a, the second electrical load 4b and the second electrical load 4n are drawn, and the remaining N-3 second electrical loads are indicated by ellipsis.

[0045] For example, combined with Figure 1 and Figure 2, the second contact 22 of the first slave-controlled relay 2a is connected to the first end of the second electrical load 4a, and the second end of the second electrical load 4a is connected to the neutral line 6. For another example, the second contact 22 of the second slave-controlled relay 2b is connected to the first end of the second electrical load 4b, and the second end of the second electrical load 4b is connected to the neutral line 6. For another example, the second contact 22 of the third slave-controlled relay 2n is connected to the first end of the second electrical load 4n, and the second end of the second electrical load 4n is connected to the neutral line 6.

[0046] Combination Figure 1 , Figure 2 as well as Figure 3 It can be seen that the first electrical load is connected between the live wire and the neutral wire through the main control relay. Specifically, when the second end of the first switch paddle of the main control relay is switched to the first branch contact, the first electrical load is turned on. The number of second branch contacts in the main control relay is consistent with the number of slave control relays and the number of second electrical loads, and the second branch contacts in the main control relay are also connected one-to-one with the slave control relay and the second electrical load.

[0047] Combination Figure 1 , Figure 2 as well as Figure 3 It can be seen that the second electrical load 4 is controlled by the switch paddles in the correspondingly connected slave control relay 2 and the master control relay 1. Specifically, for example, when the second end of the first switch paddle 14 in the master control relay 1 is switched to the second branch contact 13b, and the second end of the second switch paddle 23 of the second slave control relay 2b is connected to the second contact 22, the second electrical load 4b is energized and can operate normally, and the first electrical load 3 and the remaining second electrical loads, such as the second electrical load 4a, the second electrical load 4n, etc., remain in the off state.

[0048] Since the first branch contact is connected to the first end of the first electrical load, and the second end of the first electrical load is connected to the neutral line, the first electrical load is controlled by the master control relay, and the first electrical load will only operate when the second end of the switch paddle of the master control relay is connected to the first branch contact. Since the second end of the second switch paddle of each slave control relay is not connected to the second contact, the second switch paddle of each slave control relay is in a normally open state, even if the second end of the switch paddle in the master control relay is connected to any one of the N second branch contacts, the corresponding second electrical load will not operate before the second switch paddle of the corresponding slave control relay is not connected to the second contact. The N second electrical loads are controlled by the master control relay and the slave control relay, and the first electrical load is controlled by the master control relay. Since the second end of the first switch paddle can only be connected to one branch contact, it is ensured that multiple second electrical loads will not work at the same time in the circuit, or the first electrical load and the second electrical load will not work at the same time, which reduces the possibility of the power line current exceeding the national standard to a certain extent.

[0049] It should be noted that the above embodiment is described as the number of second electrical loads being greater than 3 or equal to 3. In practical applications, the number of second electrical loads can be increased or decreased according to actual needs, and the number N is greater than 1 or equal to 1.

[0050] As a possible implementation, when N is equal to 1, that is, the power protection device includes a master control relay and a slave control relay, such as Figure 4 As shown. Combined Figure 3 and Figure 5 , Figure 5 Another composition of the master control relay is shown. The master control relay 1 includes a main contact 11, a first branch contact 12, a second branch contact 13 and a first switch paddle 14. The slave control relay 2 includes a first contact 21, a second contact 22 and a second switch paddle 23.

[0051] The main contact 11 of the master control relay 1 is connected to the live wire 5, and the second end of the first switch paddle 14 of the master control relay 1 is connected to the second branch contact 13. The first end of the second switch paddle 23 of the slave control relay 2 is connected to the first contact 21. The first branch contact 12 is connected to the first end of the first electrical load 3, and the second end of the first electrical load 3 is connected to the neutral wire 6. The second branch contact 13 is connected to the first contact 21 of the slave control relay 2, and the second contact 22 of the slave control relay 2 is connected to the first end of the second electrical load 4, and the second end of the second electrical load 4 is connected to the neutral wire 6.

[0052] When the second end of the first switch paddle 14 of the master control relay 1 is switched from the second branch contact 13 to the first branch contact 12, the first electrical load 3 is turned on and the first electrical load 3 is working, and the second electrical load 4 is in the off state. When the second end of the first switch paddle 14 of the master control relay 1 is still connected to the second branch contact 13, and the second end of the second switch paddle 23 of the slave control relay 2 is connected to the second contact 22, the second electrical load 4 is turned on and the second electrical load 4 is working, and the first electrical load 3 is in the off state.

[0053] When the second end of the first switch paddle 14 of the master control relay 1 switches from the first branch contact 12 to the second branch contact 13, the first electrical load 3 changes from the on working state to the off state. In this case, when the second end of the second switch paddle 23 of the slave control relay 2 is connected to the second contact 22, the second electrical load 4 is turned on and the second electrical load 4 works, while the first electrical load 3 is still in the off state.

[0054] The first electrical load is controlled by the main control relay, and the second electrical load is controlled by the slave control relay and the main control relay. Since the second end of the first switch paddle can only be connected to one branch contact, it is ensured that the first electrical load and the second electrical load will not work at the same time in the circuit, which reduces the possibility of the power line current exceeding the national standard to a certain extent.

[0055] As a possible implementation, Figure 6 As shown, the power protection device 100 further includes a controller 7. The controller 7 is connected to the master control relay 1 and N slave control relays 2. For example, the controller 7 and Figure 6 The first slave control relay 2a is connected to the controller 7 and Figure 6 The second slave relay 2b is connected to the controller 7 and Figure 6 The third slave-controlled relay 2n in is connected.

[0056] The controller is configured to control the second end of the first switch paddle to be connected to the first branch contact. Alternatively, the second end of the first switch paddle is controlled to be connected to one of the N second branch contacts, and the second end of the second switch paddle of the slave-controlled relay connected to the selected second branch contact among the N slave-controlled relays is controlled to be connected to the second contact. The selected second branch contact is the second branch contact connected to the second end of the first switch paddle.

[0057] Since the first electrical load is only controlled by the master control relay, when the controller controls the second end of the first switch paddle of the master control relay to connect to the first branch contact, the first electrical load can enter the working state. The second electrical load is controlled by the master control relay and the slave control relay, and can enter the working state only when the controller controls the second end of the second switch paddle of the slave control relay connected to the selected second branch contact to connect to the second contact, and the second end of the first switch paddle of the master control relay is connected to the second branch contact corresponding to the slave control relay.

[0058] For example, refer to Figure 2 , Figure 3 as well as Figure 6 When the controller 7 controls the second end of the first switch paddle 14 of the master control relay 1 to be connected to the second branch contact 13a, in order to enable the second electrical load 4a of the corresponding branch to enter the working state, the controller 7 controls the second end of the second switch paddle 23 of the first slave control relay 2a connected to the second electrical load 4a to be connected to the second contact 22. At this time, the second branch contact is selected as the second branch contact 13a, the slave control relay 2 connected to the selected second branch contact 13a is the first slave control relay 2a, and the electrical load that enters the working state is the second electrical load 4a.

[0059] In some embodiments, Figure 7 As shown, the first electrical load 3 includes a plurality of electrical devices connected in series. For example, the first electrical load 3 includes a first electrical device 31, a second electrical device 32, and a third electrical device 33 connected in series.

[0060] In some embodiments, Figure 8 As shown, the first electrical load 3 includes a plurality of electrical devices connected in parallel. For example, the first electrical load 3 includes a first electrical device 31 and a second electrical device 32 connected in parallel.

[0061] In some embodiments, Fig. 9 As shown, the second electrical load 4 includes a plurality of electrical devices connected in series. For example, the second electrical load 4b includes a first electrical device 31, a second electrical device 32, and a third electrical device 33 connected in series.

[0062] In some embodiments, Fig.10 As shown, the second electrical load 4 includes a plurality of electrical devices connected in parallel. For example, the second electrical load 4n includes a first electrical device 31 and a second electrical device 32 connected in parallel.

[0063] It should be understood that Figure 7 , Figure 8 , Fig. 9 as well as Fig.10The number of electrical devices in the figure is only used for illustration, and the present application does not limit the number of the first electrical load including multiple electrical devices connected in series and / or multiple electrical devices connected in parallel, and the second electrical load including multiple electrical devices connected in series and / or multiple electrical devices connected in parallel.

[0064] It should also be understood that Fig. 9 and Fig.10 In the embodiment, the second electrical load 4b includes multiple electrical devices connected in series, and the second electrical load 4n includes multiple electrical devices connected in parallel, which is only used for illustration. The present application does not limit the position of the second electrical device, that is, multiple second electrical loads may include multiple electrical devices connected in series and / or multiple electrical devices connected in parallel.

[0065] The utility model also provides another electrical system, which also includes a power protection device, such as Fig.11 The power protection device 100 includes a first protection circuit 8. Specifically, the first protection circuit 8 includes a first control device 81 and a first controlled device 82.

[0066] The first input terminal 8-1 of the first protection circuit 8 is connected to the first signal input terminal, the second input terminal 8-2 of the first protection circuit 8 is connected to the second signal input terminal, and the first control device 81 is connected between the first input terminal 8-1 and the second input terminal 8-2 of the first protection circuit 8. The first output terminal 8-3 of the first protection circuit 8 is connected to the first voltage terminal VCC, the second output terminal 8-4 of the first protection circuit 8 is connected to the first terminal of the first electrical load 3, and the second terminal of the first electrical load 3 is connected to the third voltage terminal GND. The first controlled device 82 is connected between the first output terminal 8-3 and the second output terminal 8-4 of the first protection circuit 8.

[0067] The first controlled device 82 is configured to be turned on when the first control device 81 is turned on. The first control device 81 is configured to be turned on when the voltage of the first signal outputted from the first signal input terminal is greater than the voltage of the second signal outputted from the second signal input terminal.

[0068] The power protection device 100 also includes a second protection circuit 9. Specifically, the second protection circuit 9 includes a second control device 91 and a second controlled device 92. The first input terminal 9-1 of the second protection circuit 9 is connected to the second signal input terminal 9-2, the second input terminal 9-2 of the second protection circuit 9 is connected to the first signal input terminal, and the second control device 91 is connected between the first input terminal 9-1 and the second input terminal 9-2 of the second protection circuit 9. The first output terminal 9-3 of the second protection circuit 9 is connected to the second voltage terminal VDD, the second output terminal 9-4 of the second protection circuit 9 is connected to the second power load 4, and the second controlled device 92 is connected between the first output terminal 9-3 and the second output terminal 9-4 of the second protection circuit 9.

[0069] The second controlled device 92 is configured to be turned on when the second control device 91 is turned on. The second control device 91 is configured to be turned on when the voltage of the first signal outputted from the first signal input terminal is lower than the voltage of the second signal outputted from the second signal input terminal.

[0070] The first controlled device 82 and the second controlled device 92 are usually in the off state, so the first power load 3 and the second power load 4 respectively connected to the first controlled device 82 and the second controlled device 92 cannot be powered, and are therefore also in the off state. Since the first control device 81 is turned on only when the voltage of the first signal output from the first signal input terminal is greater than the voltage of the second signal output from the second signal input terminal, and the second control device 91 is turned on only when the voltage of the first signal output from the first signal input terminal is less than the voltage of the second signal output from the second signal input terminal, only one of the first controlled device 82 and the second controlled device 92 can be in the on state.

[0071] For example, when the voltage of the first signal output from the first signal input terminal is greater than the voltage of the second signal output from the second signal input terminal, the first controlled device is turned on, the first electrical load is powered on, and the second electrical load is in an off state.

[0072] For another example, when the voltage of the first signal output from the first signal input terminal is less than the voltage of the second signal output from the second signal input terminal, the second controlled device is turned on, the second electrical load is powered on, and the first electrical load is in the off state.

[0073] Therefore, it is ensured that the first power load and the second power load will not work simultaneously in the circuit, which reduces the possibility of the power line current exceeding the national standard to a certain extent.

[0074] Further, such as Fig.12As shown, the first control device 81 is a first photodiode 811, and the first controlled device 82 is a first photoelectric switch tube 821. The anode of the first photodiode 811 is electrically connected to the first input terminal 8-1 of the first protection circuit 8, and the cathode of the first photodiode 811 is electrically connected to the second input terminal 8-2 of the first protection circuit 8. The first pole of the first photoelectric switch tube 821 is electrically connected to the first output terminal 8-3 of the first protection circuit 8, and the second pole of the first photoelectric switch tube 821 is electrically connected to the second output terminal 8-4 of the first protection circuit 8.

[0075] The second control device 91 is a second photodiode 911, and the second controlled device 92 is a second photoelectric switch tube 921. The anode of the second photodiode 911 is electrically connected to the second input terminal 9-2 of the second protection circuit 9, and the cathode of the second photodiode 911 is electrically connected to the first input terminal 9-1 of the second protection circuit 9. The first pole of the second photoelectric switch tube 921 is electrically connected to the first output terminal 9-3 of the second protection circuit 9, and the second pole of the second photoelectric switch tube 921 is electrically connected to the second output terminal 9-4 of the second protection circuit 9.

[0076] Reference Fig.12 When the voltage of the first signal output from the first signal input terminal is greater than the voltage of the second signal output from the second signal input terminal, the first photodiode 811 is turned on and the second photodiode 911 is turned off. The first photoelectric switch tube 821 is turned on and the second photoelectric switch tube 921 is turned off, the first electrical load 3 is working and the second electrical load 4 is in the off state.

[0077] When the voltage of the first signal output from the first signal input terminal is less than the voltage of the second signal output from the second signal input terminal, the second photodiode 911 is turned on and the first photodiode 811 is turned off. The second photoelectric switch tube 921 is turned on and the first photoelectric switch tube 821 is turned off, the second electrical load 4 is in operation and the first electrical load 3 is in an off state.

[0078] It should be noted that the electrical system in this application may refer to a specific household appliance, which includes multiple electrical functional components, and the electrical functional components are components in the household appliance that require electricity to achieve the corresponding functions. Take the household appliance as an oven as an example. In this case, the oven can achieve functions such as heating food, lighting, and taking pictures. The oven includes components related to the heating function, components related to the lighting function, and components related to the taking pictures function, and these components all need to be powered on to operate.

[0079] The first electrical load is at least one electrical functional component in the appliance, the second electrical load is at least one electrical functional component of the appliance, and the first electrical load and the second electrical load are not the same. The first electrical load and the second electrical load can be different functional components that need electricity in the oven, for example, the first electrical load is a functional component associated with the lighting function, and the second electrical load is a functional component associated with the camera function. In the case where the first electrical load is a functional component associated with the lighting function, the first electrical load in the above "the first electrical load includes a plurality of electrical devices connected in series and a plurality of electrical devices connected in parallel." may include a plurality of LED light groups connected in series and / or in parallel. In the case where the second electrical load is a functional component associated with the camera function, the second electrical load in the above "the second electrical load includes a plurality of electrical devices connected in series and / or a plurality of electrical devices connected in parallel" may include a plurality of cameras connected in series and / or in parallel.

[0080] The electrical system in the present application may also refer to smart home devices. In this case, the first electrical load and the second electrical load may be a collection of household appliances in different areas. Specifically, the first electrical load is at least one appliance in the collection of multiple electrical appliances, and the second electrical load is at least one appliance in the collection of multiple electrical appliances. For example, the first electrical load is a collection of household appliances in the living room area, and the second electrical load is a collection of household appliances in the bedroom area. In the case where the first electrical load is a collection of household appliances in the living room area, the electrical appliances in the above "the first electrical load includes multiple electrical appliances connected in series and / or multiple electrical appliances connected in parallel." may be household appliances such as televisions and air conditioners in the living room area. In the case where the second electrical load is a collection of household appliances in the bedroom area, the electrical appliances in the above "the second electrical load includes multiple electrical appliances connected in series and / or multiple electrical appliances connected in parallel" may be household appliances such as humidifiers and projectors in the bedroom area.

[0081] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electrical system, characterized in that: include: a first electrical load; A second electrical load; A power protection device, the power protection device comprising: A main control relay, the main control relay comprising a main contact, a first branch contact, N second branch contacts and a first switch paddle, wherein a first end of the first switch paddle is connected to the main contact, and a second end of the first switch paddle is connected to any one of the N second branch contacts; the main contact is connected to a live wire; the first branch contact is connected to a first end of a first electrical load, and a second end of the first electrical load is connected to a neutral wire; N slave-controlled relays; the slave-controlled relays include a first contact, a second contact and a second switch paddle, the first end of the second switch paddle is connected to the first contact; each of the second contacts in the N slave-controlled relays is connected to the first end of N second electrical loads, and the second end of the second electrical loads is connected to the neutral line; the first contacts of the N slave-controlled relays are respectively connected to the N second branch contacts of the master control relay; N is a positive integer greater than or equal to 1.

2. The electrical system according to claim 1, characterized in that: The power protection device includes a master control relay and a slave control relay; The main control relay comprises a main contact, a first branch contact, a second branch contact and a first switch paddle; The second end of the first switch paddle of the main control relay is connected to the second branch contact; The slave-controlled relay comprises a first contact, a second contact and a second switch paddle, and a first end of the second switch paddle of the slave-controlled relay is connected to the first contact; The first branch contact is connected to the first end of the first electrical load, and the second end of the first electrical load is connected to the neutral line; the second branch contact is connected to the first contact of the slave-controlled relay, the second contact of the slave-controlled relay is connected to the first end of the second electrical load, and the second end of the second electrical load is connected to the neutral line.

3. The electrical system according to claim 1 or 2, characterized in that: The power protection device further comprises a controller; the controller is connected to a master control relay and N slave control relays; The controller is configured to control the second end of the first switch paddle to be connected to the first branch contact; or, control the second end of the first switch paddle to be connected to one of N second branch contacts, and control the second end of the second switch paddle of the slave-controlled relay connected to the selected second branch contact among the N slave-controlled relays to be connected to the second contact; the selected second branch contact is the second branch contact connected to the second end of the first switch paddle.

4. The electrical system according to claim 1 or 2, characterized in that: The first electrical load includes a plurality of electrical devices connected in series and / or a plurality of electrical devices connected in parallel.

5. The electrical system according to claim 1 or 2, characterized in that: The second electrical load includes a plurality of electrical devices connected in series and / or a plurality of electrical devices connected in parallel.

6. The electrical system according to claim 1 or 2, characterized in that: The electrical system is an electrical appliance, the first electrical load is at least one electrical functional component in the electrical appliance, and the second electrical load is at least one electrical functional component of the electrical appliance; Alternatively, the electrical system is a collection of multiple electrical appliances, the first electrical load is at least one electrical appliance in the collection of multiple electrical appliances, and the second electrical load is at least one electrical appliance in the collection of multiple electrical appliances.

7. An electrical system, characterized in that: The electrical system includes a first electrical load, a second electrical load and a power protection device, wherein the power protection device includes a first signal input terminal and a second signal input terminal: A first protection circuit; comprising a first control device and a first controlled device, wherein a first input terminal of the first protection circuit is connected to the first signal input terminal, a second input terminal of the first protection circuit is connected to the second signal input terminal, and the first control device is connected between the first input terminal and the second input terminal of the first protection circuit; The first output terminal of the first protection circuit is connected to the first voltage terminal, the second output terminal of the first protection circuit is connected to the first power load, the first controlled device is connected between the first output terminal and the second output terminal of the first protection circuit, and the first controlled device is configured to be turned on when the first control device is turned on; the first control device is configured to be turned on when the voltage of the first signal output from the first signal input terminal is greater than the voltage of the second signal output from the second signal input terminal; A second protection circuit; comprising a second control device and a second controlled device, wherein a first input terminal of the second protection circuit is connected to the second signal input terminal, a second input terminal of the second protection circuit is connected to the first signal input terminal, and the second control device is connected between the first input terminal and the second input terminal of the second protection circuit; The first output terminal of the second protection circuit is connected to the second voltage terminal, the second output terminal of the second protection circuit is connected to the second electrical load, the second controlled device is connected between the first output terminal and the second output terminal of the second protection circuit, and the second controlled device is configured to be turned on when the second control device is turned on; The second control device is configured to be turned on when a voltage of a first signal outputted from the first signal input terminal is lower than a voltage of a second signal outputted from the second signal input terminal.

8. The electrical system according to claim 7, characterized in that: The first control device is a first photodiode, the first controlled device is a first photoelectric switch tube, the anode of the first photodiode is electrically connected to the first input terminal of the first protection circuit, and the cathode of the first photodiode is electrically connected to the second input terminal of the first protection circuit; The first electrode of the first photoelectric switch tube is electrically connected to the first output end of the first protection circuit, and the second electrode of the first photoelectric switch tube is electrically connected to the second output end of the first protection circuit.

9. The electrical system according to claim 7, characterized in that: The second control device is a second photodiode, the second controlled device is a second photoelectric switch tube, the anode of the second photodiode is electrically connected to the second input terminal of the second protection circuit, and the cathode of the second photodiode is electrically connected to the first input terminal of the second protection circuit; The first electrode of the second photoelectric switch tube is electrically connected to the first output end of the second protection circuit, and the second electrode of the second photoelectric switch tube is electrically connected to the second output end of the second protection circuit.

10. The electrical system according to any one of claims 7 to 9, characterized in that: The electrical system is an electrical appliance, the first electrical load is at least one electrical functional component in the electrical appliance, and the second electrical load is at least one electrical functional component of the electrical appliance; Alternatively, the electrical system is a collection of multiple electrical appliances, the first electrical load is at least one electrical appliance in the collection of multiple electrical appliances, and the second electrical load is at least one electrical appliance in the collection of multiple electrical appliances.

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