A switching device

Abstract

This utility model discloses a switching device, including a voltage comparison module electrically connected to an induction amplifier module, a water pump, and a power supply component. The power supply component supplies power to the power supply component, voltage comparison module, induction amplifier module, and water pump. The induction amplifier module senses the alternating electric field of the outdoor unit of the air conditioner and generates induced current and voltage. The voltage comparison module receives the signal from the induction amplifier module and controls the start and stop of the water pump. The beneficial effects of this utility model are that the induction amplifier module can determine whether the outdoor unit of the air conditioner is powered on and transmits the induced electrical signal to the voltage comparison module. The voltage comparison module compares the received signal voltage with a reference voltage to determine whether to supply power to the water pump. Furthermore, an alarm component can determine whether the water pump has malfunctioned and provide a buzzer warning. This device can automatically add or stop water supply based on the start and stop status of the outdoor unit of the air conditioner, thereby saving energy and water resources.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning products technology, and in particular to a switching device. Background Technology

[0002] Currently, there is no similar control circuit on the market that can be activated when the outdoor unit of an air conditioner is turned on, nor is there a switch device that can automatically close the circuit when a multi-core insulated cable is energized.

[0003] Our patent, an air conditioning cooling device (patent number 2024221629050), revealed that although the submersible pump can be automatically stopped during use, the water pump continues to circulate even when the air conditioner is not working due to the presence of water inside the device and the water supply. This wastes water and electricity.

[0004] Existing methods involve various sensor control circuits, but these all require breaking the power supply line of the outdoor unit of the air conditioner or directly drawing power from the power connector inside the outdoor unit. Although this allows for control, it damages the outdoor unit. If the air conditioner malfunctions, it can lead to multiple disputes between the air conditioner vendor, our company, and the customer.

[0005] To address this, the inventor designed a switch that can follow the start and stop of the air conditioner. Utility Model Content

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0007] In view of the problems existing in the above or prior art, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a switching device that can start when the air conditioner outdoor unit is started and turn off when the air conditioner outdoor unit is turned off without damaging the outdoor unit's wiring, thereby achieving automatic water supply and timely water stop operation, thus saving water and electricity.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a switching device, which includes a power supply component, a voltage comparison module, an induction amplification module, and a water pump; the voltage comparison module is electrically connected to the induction amplification module, the water pump, and the power supply component respectively; the power supply component can supply power to the power supply component, the voltage comparison module, the induction amplification module, and the water pump; the induction amplification module can sense the alternating electric field of the air conditioner and generate induced current and voltage, and output an amplified signal to the voltage comparison module; the voltage comparison module receives the signal from the induction amplification module and controls the start and stop of the water pump.

[0010] As a preferred embodiment of the switching device of this utility model, it further includes an alarm component, which is connected in series with the voltage comparison module and the water pump circuit; the alarm component can provide an alarm when the water pump fails.

[0011] In a preferred embodiment of the switching device of this utility model, the induction amplification module includes a signal amplification module, an electromagnetic coil induction sensor, and a first adjustable resistor; the signal amplification module is connected to the electromagnetic coil induction sensor and the first adjustable resistor respectively; when the air conditioner is powered on, the electromagnetic coil induction sensor can sense and generate an electrical signal, the signal amplification module can receive the electrical signal, process and calculate it, and after being adjusted by the first adjustable resistor, it enters the voltage comparison module through a wire.

[0012] In a preferred embodiment of the switching device of this utility model, the signal amplification module can perform primary or secondary operational amplification.

[0013] In a preferred embodiment of the switching device of this utility model, the voltage comparison module includes a chip module and a second adjustable resistor; the chip module is connected to the output terminal of the signal amplification module, the signal amplification module is connected to the signal amplification module, the second adjustable resistor can adjust the magnitude of the comparison voltage, and the chip module can compare the magnitude of the signal voltage and the reference voltage.

[0014] In a preferred embodiment of the switching device of this utility model, the voltage comparison module further includes a first relay, which is connected to the chip module and the water pump respectively. When the signal voltage is greater than the reference voltage, the first relay can supply power to or de-energize the water pump.

[0015] In a preferred embodiment of the switching device of this utility model, the alarm component includes a second relay and a buzzer; the second relay is connected to the buzzer, and when the water pump fails, no current flows through the second relay, and the buzzer sounds an alarm.

[0016] In a preferred embodiment of the switching device of this utility model, a fixing module is further included, which can support the induction amplification module and is connected to the air conditioning cable.

[0017] In a preferred embodiment of the switching device of this utility model, a shielding component is provided on the fixed module, which can shield environmental electrical signals other than those from air conditioning.

[0018] In a preferred embodiment of the switching device of this utility model, the inductive amplification module includes an electromagnetic coil inductive sensor, a transistor amplification circuit, and a capacitor; the electromagnetic coil inductive sensor is connected to the transistor amplification circuit, and a capacitor is provided between the transistor amplification circuit and the chip module, which can convert the amplified DC interval signal into a continuous voltage signal.

[0019] The beneficial effects of this utility model are as follows: This utility model can detect whether the outdoor unit of the air conditioner is powered on through the induction amplification module, and transmit the sensed electrical signal to the voltage comparison module. The voltage comparison module compares the received signal voltage with the reference voltage to determine whether to supply power to the water pump. In addition, the alarm component can detect whether the water pump has malfunctioned and issue a buzzer warning. This device can automatically add or stop water supply according to the start and stop status of the outdoor unit of the air conditioner, thereby saving electricity and water energy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a three-dimensional structural diagram of the switching device.

[0022] Figure 2 A three-dimensional schematic diagram of the fixed module of the switching device.

[0023] Figure 3 This is a three-dimensional schematic diagram of the inductive amplification module of the switching device.

[0024] Figure 4 This is a circuit diagram of Embodiment 2 of the switching device.

[0025] Figure 5 This is a circuit diagram of embodiment 3 of the switching device.

[0026] Figure reference numerals: Power supply component, 1; Voltage comparison module, 2; Inductive amplification module, 3; Water pump, 4; Alarm component, 5; Signal amplification module, 31; Electromagnetic coil induction sensor, 32; First adjustable resistor, 33; Chip module, 21; Second adjustable resistor, 22; First relay, 23; Second relay, 51; Buzzer, 52; Switch, 11; DC power supply, 12; Shielding component, 6; Transistor amplifier circuit, 34; Capacitor, 35; Air conditioner cable, A1; Positive voltage, V; Neutral / ground wire, G; Power input terminal, A2; Power output terminal, A3; First stage amplification output, A4; Second stage amplification output, A5; Filter, A6; Signal input, A7; Ground wire, A8; Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Example 1

[0030] Reference Figures 1-3 This is the first embodiment of the present invention. This embodiment provides a switching device, which includes a power supply component 1, a voltage comparison module 2, an induction amplification module 3, and a water pump 4. The power supply component 1 can convert AC power into DC power. The induction amplification module 3 can sense the working status of the outdoor unit of the air conditioner, thereby sensing an electrical signal. The voltage comparison module 2 can compare and judge the received electrical signal with a reference voltage, thereby controlling the water pump 4 to add or stop water.

[0031] Specifically, it includes a power supply component 1, a voltage comparison module 2, an induction amplification module 3, and a water pump 4. The voltage comparison module 2 is electrically connected to the induction amplification module 3, the water pump 4, and the power supply component 1. The power supply component 1 can supply power to the power supply component 1, the voltage comparison module 2, the induction amplification module 3, and the water pump 4. The induction amplification module 3 can sense the alternating electric field of the air conditioner and generate induced current and voltage, and output an amplified signal to the voltage comparison module 2. The voltage comparison module 2 receives the signal from the induction amplification module 3 and controls the start and stop of the water pump 4.

[0032] In summary, the induction amplification module 3 can sense the working status of the outdoor unit of the air conditioner and sense the alternating electric field of the outdoor unit, thereby generating an electrical signal. After amplifying the signal, it is transmitted to the voltage comparison module 2. The voltage comparison module 2 receives the electrical signal and compares it with the reference signal to determine whether the water pump 4 should start or stop water supply. Example 2

[0033] Reference Figures 1-4 This is the second embodiment of the present invention. In the previous embodiment, the switching device includes a power supply component 1, a voltage comparison module 2, an induction amplification module 3, and a water pump 4. The power supply component 1 can convert AC power into DC power. The induction amplification module 3 can sense the working status of the outdoor unit of the air conditioner, thereby sensing an electrical signal. The voltage comparison module 2 can compare and judge the received electrical signal with the reference voltage, thereby controlling the water pump 4 to add or stop water.

[0034] Specifically, it includes a power supply component 1, a voltage comparison module 2, an induction amplification module 3, and a water pump 4. The voltage comparison module 2 is electrically connected to the induction amplification module 3, the water pump 4, and the power supply component 1. The power supply component 1 can supply power to the power supply component 1, the voltage comparison module 2, the induction amplification module 3, and the water pump 4. The induction amplification module 3 can sense the alternating electric field of the air conditioner and generate induced current and voltage, and output an amplified signal to the voltage comparison module 2. The voltage comparison module 2 receives the signal from the induction amplification module 3 and controls the start and stop of the water pump 4.

[0035] Furthermore, it also includes an alarm component 5, which is connected in series in the voltage comparison module 2 and the water pump 4 circuit; the alarm component 5 can provide an alarm when the water pump 4 fails.

[0036] Furthermore, the induction amplification module 3 includes a signal amplification module 31, an electromagnetic coil induction sensor 32, and a first adjustable resistor 33; the signal amplification module 31 is connected to the electromagnetic coil induction sensor 32 and the first adjustable resistor 33 respectively; when the air conditioner is powered on, the electromagnetic coil induction sensor 32 can sense and generate an electrical signal, the signal amplification module 31 can receive the electrical signal, process and calculate it, and after being adjusted by the first adjustable resistor 33, it enters the voltage comparison module 2 through the wire.

[0037] Preferably, the electromagnetic coil induction sensor 32 is an induction antenna made of copper spiral wire.

[0038] Preferably, the signal amplification module 31 uses an LM358 two-stage signal amplification module;

[0039] Preferably, the fixing module 7 is used to fix the signal amplification module 31 and the electromagnetic coil induction sensor 32 to the air conditioner cable. It is made of flexible PETG material or other materials resistant to outdoor weather such as ABS, with an opening on one side, so that it can be clipped onto the air conditioner outdoor unit cable.

[0040] Preferably, the signal input terminal of the LM358 secondary signal amplification module is connected to a spiral coil as an AC signal receiver. When the power supply line of the air conditioner outdoor unit is energized, the alternating electric field generated by the AC current will induce current and voltage in the coil. These weak electrical signals will enter the LM358 chip from the signal input terminal, undergo operational amplification, and be output to the first adjustable resistor 33. After adjustment, the signal can be directly output to the first-stage amplification output terminal, or it can re-enter the LM358 chip for secondary operational amplification, and then be output to the second-stage adjustable resistor before being output to the second-stage amplification output terminal. From the second-stage amplification output terminal, the amplified signal is output to the voltage comparator module 2 via a wire.

[0041] Furthermore, the signal amplification module 31 can perform single-operation amplification or double-operation amplification.

[0042] Furthermore, the voltage comparison module 2 includes a chip module 21 and a second adjustable resistor 22; the chip module 21 is connected to the output terminal of the signal amplification module 31, the signal amplification module 31 is connected to the signal amplification module 31, the second adjustable resistor 22 can adjust the magnitude of the comparison voltage, and the chip module 21 can compare the magnitude of the signal voltage and the reference voltage.

[0043] Preferably, chip module 21 uses the LM393 chip. The electrical signal voltage amplified by the LM358 secondary signal amplification module has a certain magnitude. We only need to adjust the reference voltage to be less than the signal voltage to compare the correct magnitude through the LM393 chip. The signal voltage is greater than the reference voltage.

[0044] Preferably, the adjustable resistor is used to adjust the magnitude of the comparison voltage.

[0045] Furthermore, the voltage comparison module 2 also includes a first relay 23, which is connected to the chip module 21 and the water pump 4 respectively. When the signal voltage is greater than the reference voltage, the first relay 23 can supply power to or de-energize the water pump 4.

[0046] Furthermore, the alarm component 5 includes a second relay 51 and a buzzer 52; the second relay 51 is connected to the buzzer 52, and when the water pump 4 fails, no current flows through the second relay 51, and the buzzer 52 sounds an alarm.

[0047] Preferably, the second relay 51 is a normally closed relay.

[0048] Preferably, the circuit controlling the switch of the first relay 23, controlled by the LM393 chip, is connected to the power output terminal. Here, the positive input terminal of the water pump is connected to the normally open output terminal of the first relay 23. When the LM393 chip outputs control current to the first relay 23, the control current of the first relay 23 in the voltage comparison module 2 controls the current from the DC power supply through a transistor. The contacts inside the first relay 23 connect to the normally open contacts, thereby supplying power to the water pump 4. A low-power second relay 51, a MOSFET, or other control circuit is directly connected in series on the connection line between the first relay 23 and the water pump 4 to prevent alarms when the water pump is not working. When the water pump is working normally, current flows through the control terminal of the normally closed relay, causing the normally closed relay to open its switch contacts. This prevents the buzzer from working. When the water pump is damaged and not powered, the first relay 23 cannot work, causing the switch contacts inside the second relay 51 to remain closed, thus activating the buzzer alarm.

[0049] Ideally, when the user stops the air conditioner, the power supply line of the outdoor unit loses voltage and current, and no longer generates an alternating electric field. Although the LM358 secondary signal amplification module can still sense other electrical signals in the environment, it will not amplify them into a comparable voltage signal through the amplification chip. This causes the voltage comparison in the voltage comparison circuit module to be lower than the set value, thereby controlling the first relay 23 to disconnect the power supply, causing the water pump to stop working. At the same time, the second relay 51 also disconnects the power supply to the buzzer. Although the buzzer is closed due to the power failure, there is no current supply from the power output terminal of the first relay 23 in the voltage comparison circuit module to make it sound.

[0050] Furthermore, the power supply assembly 1 includes a switch 11 and a DC power supply 12; the switch 11 is connected to the DC power supply 12, the DC power supply 12 can convert AC power to DC power, and the switch 11 can control the on / off state of the DC power supply 12.

[0051] Preferably, the DC power supply 12 can convert AC power to DC power for supply.

[0052] Preferably, a filter is also provided between the inductive amplifier module 3 and the voltage comparator module 2 circuit, which can effectively filter out signals outside the target frequency.

[0053] Furthermore, it also includes a fixing module 7, which can support the induction amplification module 3 and is connected to the air conditioning cable A1.

[0054] Furthermore, the inductive amplification module 3 is equipped with a shielding component 6, which shields environmental electrical signals other than those from the air conditioner.

[0055] Ideally, it should be noted that due to the sensitivity of the sensor, the DC power supply module and the AC power it is connected to should be kept as far away from the sensor as possible to prevent the alternating electric field from interfering with the sensor and amplifier module.

[0056] Meanwhile, to further prevent electromagnetic interference from the environment, we added an electromagnetic shielding sleeve. The shielding component 6 is made of conductive material and is grounded via grounding wire A8 to any grounding point, such as directly connecting it to the grounding wire on the outer casing of the air conditioner's outdoor unit, connecting it to the grounding wire in the air conditioner's power supply line, or the grounding wire in a three-phase socket. After grounding, the electromagnetic shielding sleeve can shield against external environmental electrical signals other than the power supply line of the air conditioner's outdoor unit inside the sleeve, preventing other electrical signals from interfering with the sensor's operation.

[0057] There is an even simpler and lower-cost method: you can directly use aluminum foil and a grounding wire, and then fix it with tape. This can reduce external electromagnetic interference to a certain extent and make the signal more stable.

[0058] In summary, this invention uses the induction amplification module 3 to determine whether the outdoor unit of the air conditioner is powered on, and transmits the sensed electrical signal to the voltage comparison module 2. The voltage comparison module 2 compares the received signal voltage with the reference voltage to determine whether to supply power to the water pump 4. Furthermore, the alarm component 5 can determine whether the water pump 4 has malfunctioned and issue a buzzer warning. This device can automatically add or stop water supply based on the start / stop status of the outdoor unit of the air conditioner, thereby saving energy and water. Example 3

[0059] Reference Figures 1-3 and Figure 5 This is the third embodiment of the present invention. Based on embodiment 1, it also includes an alarm component 5, which is connected in series in the voltage comparison module 2 and the water pump 4 circuit; the alarm component 5 can provide an alarm when the water pump 4 fails.

[0060] Furthermore, the inductive amplification module 3 includes an electromagnetic coil inductive sensor 32, a transistor amplifier circuit 34, and a capacitor 35; the electromagnetic coil inductive sensor 32 is connected to the transistor amplifier circuit 34, and a capacitor 35 is provided between the transistor amplifier circuit 34 and the chip module 21. The capacitor 35 can convert the amplified DC interval signal into a continuous voltage signal.

[0061] The preferred second solution is to replace the LM358 two-stage signal amplification module with a multi-stage transistor amplifier circuit, and add a 35µF capacitor to convert the amplified DC interval signal into a stable continuous voltage signal.

[0062] In a transistor multistage amplifier circuit, except for the sensing coil which is connected to the base of the first transistor, the bases of the other transistors are connected to the emitters of the previous transistor in sequence, while the collectors of all the transistors are connected in parallel to the positive line of the DC power supply.

[0063] Furthermore, the voltage comparison module 2 includes a chip module 21 and a second adjustable resistor 22; the chip module 21 is connected to the output terminal of the signal amplification module 31, the signal amplification module 31 is connected to the signal amplification module 31, the second adjustable resistor 22 can adjust the magnitude of the comparison voltage, and the chip module 21 can compare the magnitude of the signal voltage and the reference voltage.

[0064] Furthermore, the voltage comparison module 2 also includes a first relay 23, which is connected to the chip module 21 and the water pump 4 respectively. When the signal voltage is greater than the reference voltage, the first relay 23 can supply power to or de-energize the water pump 4.

[0065] Furthermore, the alarm component 5 includes a second relay 51 and a buzzer 52; the second relay 51 is connected to the buzzer 52, and when the water pump 4 fails, no current flows through the second relay 51, and the buzzer 52 sounds an alarm.

[0066] Furthermore, the power supply assembly 1 includes a switch 11 and a DC power supply 12; the switch 11 is connected to the DC power supply 12, the DC power supply 12 can convert AC power to DC power, and the switch 11 can control the on / off state of the DC power supply 12.

[0067] Furthermore, the inductive amplification module 3 is equipped with a shielding component 6, which shields environmental electrical signals other than those from the air conditioner.

[0068] Preferably, the signal input terminal of the transistor amplifier circuit 34 is connected to the electromagnetic coil induction sensor 32 as an AC signal receiver. When the power supply line of the outdoor unit of the air conditioner is energized, the alternating electric field generated by the AC power will induce current and voltage in the coil. These weak electrical signals will enter the transistor amplifier circuit 34 from the signal input terminal for amplification. The capacitor 35 is used to convert the amplified DC interval signal into a stable continuous voltage signal and input it into the voltage comparison module 2.

[0069] Preferably, chip module 21 uses an LM393 chip. The electrical signal voltage after passing through the transistor amplifier circuit 34 has a certain magnitude. We only need to adjust the reference voltage to be less than the signal voltage to obtain the correct magnitude through comparison by the LM393 chip. If the signal voltage is greater than the reference voltage...

[0070] Preferably, the circuit controlling the switch of the first relay 23, controlled by the LM393 chip, is connected to the power output terminal. Here, the positive input terminal of the water pump is connected to the normally open output terminal of the first relay 23. When the LM393 chip outputs control current to the first relay 23, the control current of the first relay 23 in the voltage comparison module 2 is controlled by a transistor to control the current from the DC power supply. The contacts inside the first relay 23 are connected to the normally open contacts, thus supplying power to the water pump 4. A low-power second relay 51, a MOSFET, or other control circuit is directly connected in series on the connection line between the first relay 23 and the water pump 4 to prevent alarms when the water pump is not working. When the water pump is working normally, current flows through the control terminal of the normally closed relay, causing the normally closed relay to open its switch contacts. This prevents the buzzer from working. When the water pump is damaged and not powered, the first relay 23 cannot work, causing the switch contacts inside the second relay 51 to remain closed, thus activating the buzzer alarm.

[0071] Ideally, when the user stops the air conditioner, the power supply line of the outdoor unit loses voltage and current, and no longer generates an alternating electric field. Although the LM358 secondary signal amplification module can still sense other electrical signals in the environment, it will not amplify them into a comparable voltage signal through the amplification chip. This causes the voltage comparison in the voltage comparison circuit module to be lower than the set value, thereby controlling the first relay 23 to disconnect the power supply, causing the water pump to stop working. At the same time, the second relay 51 also disconnects the power supply to the buzzer. Although the buzzer is closed due to the power failure, there is no current supply from the power output terminal of the first relay 23 in the voltage comparison circuit module to make it sound.

[0072] Furthermore, the power supply assembly 1 includes a switch 11 and a DC power supply 12; the switch 11 is connected to the DC power supply 12, the DC power supply 12 can convert AC power to DC power, and the switch 11 can control the on / off state of the DC power supply 12.

[0073] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0074] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0075] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A switching device, characterized in that: It includes a power supply component (1), a voltage comparison module (2), an induction amplification module (3), and a water pump (4); the voltage comparison module (2) is electrically connected to the induction amplification module (3), the water pump (4), and the power supply component (1), respectively. The power supply component (1) can supply power to the power supply component (1), the voltage comparison module (2), the induction amplification module (3), and the water pump (4). The induction amplification module (3) can sense the alternating electric field of the outdoor unit of the air conditioner and generate induced current and voltage, and output an amplified signal to the voltage comparison module (2). The voltage comparison module (2) receives the signal from the induction amplification module (3) and controls the start and stop of the water pump (4).

2. The switching device as described in claim 1, characterized in that: It also includes an alarm component (5), which is connected in series on the voltage comparison module (2) and the water pump (4) circuit; the alarm component (5) can provide an alarm when the water pump (4) fails.

3. The switching device as described in claim 2, characterized in that: The induction amplification module (3) includes a signal amplification module (31), an electromagnetic coil induction sensor (32), and a first adjustable resistor (33); the signal amplification module (31) is connected to the electromagnetic coil induction sensor (32) and the first adjustable resistor (33) respectively; when the air conditioner is powered on, the electromagnetic coil induction sensor (32) can sense and generate an electrical signal, the signal amplification module (31) can receive the electrical signal, process and calculate it, and after being adjusted by the first adjustable resistor (33), it enters the voltage comparison module (2) through the wire.

4. The switching device as described in claim 2, characterized in that: The inductive amplification module (3) includes an electromagnetic coil inductive sensor (32), a transistor amplifier circuit (34), and a capacitor (35); the electromagnetic coil inductive sensor (32) is connected to the transistor amplifier circuit (34), and a capacitor (35) is provided between the transistor amplifier circuit (34) and the chip module (21). The capacitor (35) can convert the amplified DC interval signal into a continuous voltage signal.

5. The switching device as described in claim 3 or 4, characterized in that: The voltage comparison module (2) includes a chip module (21) and a second adjustable resistor (22); the chip module (21) is connected to the output terminal of the signal amplification module (31), the signal amplification module (31) is connected to the signal amplification module (31), the second adjustable resistor (22) can adjust the magnitude of the comparison voltage, and the chip module (21) can compare the magnitude of the signal voltage and the reference voltage.

6. The switching device as described in claim 5, characterized in that: The voltage comparison module (2) also includes a first relay (23), which is connected to the chip module (21) and the water pump (4) respectively. When the signal voltage is greater than the reference voltage, the first relay (23) can supply power to or cut off the water pump (4).

7. The switching device as claimed in claim 2, characterized in that: The alarm component (5) includes a second relay (51) and a buzzer (52); the second relay (51) is connected to the buzzer (52), and when the water pump (4) fails, no current flows through the second relay (51), and the buzzer (52) sounds an alarm.

8. The switching device as claimed in claim 1, characterized in that: A filter (A5) is also provided between the inductive amplifier module (3) and the voltage comparison module (2) circuit. The filter (A5) can effectively filter signals outside the target frequency.

9. The switching device according to any one of claims 1 to 4, characterized in that: It also includes a fixing module (7), which can support the induction amplification module (3) and is connected to the air conditioning cable (A1).

10. The switching device as claimed in claim 9, characterized in that: The fixed module (7) is provided with a shielding component (6), which can shield environmental electrical signals other than those from the air conditioner.

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