External water tank of dehumidifier

Abstract

The invention discloses an external water tank of a dehumidifier. The external water tank comprises a water tank body and an electric control board. The water tank main body comprises a drainage connector externally connected with a drainage pipe, a water inlet communicated with a drainage port of the dehumidifier, and a water storage tank communicated with the water inlet. A water inlet pipe of the water pump is communicated with the water storage tank, and a water outlet pipe of the water pump is communicated with the drainage connector. At least one floating ball switch is arranged in the water storage tank, and when a floating ball is in a preset high position, a high-position signal is triggered; and when the floating ball is in a preset low position, a low position signal is triggered. The electric control board is simultaneously in signal connection with the water pump and the float switch. When the dehumidifier drains water, the floating ball rises along with the water level, when the floating ball reaches a preset high position, the floating ball switch triggers a high-position signal, the electric control board controls the water pump to start pumping water, the floating ball falls along with the water level, and when the floating ball reaches a preset low position, the floating ball switch triggers a low-position signal, and the electric control board controls the water pump to stop pumping water. The water level is detected through the floating ball switch, the water pump is controlled to be started and stopped, continuous, automatic and unattended drainage of condensate water of the dehumidifier is achieved, the problem that a water tank of a traditional dehumidifier needs to be poured manually is effectively solved, and the water tank can adapt to complex room scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidifiers, and in particular to an external water tank of a dehumidifier. Background Art

[0002] A dehumidifier is a household appliance, available in both residential and industrial versions. It consists of a compressor, heat exchanger, fan, water tank, housing, and controller. Its primary function is to reduce humidity in a room. Its working principle is this: a fan draws moist air into the dehumidifier, where it condenses into water droplets through a heat exchanger. The dry air is then exhausted, a cycle that maintains a comfortable relative humidity in the room.

[0003] Existing dehumidifiers generally drain condensed water directly into their own water tanks or directly to the outside of the machine body. When draining condensed water into the water tank, the water needs to be poured out after the tank is full and then reinserted before the machine can work. This relies on manual supervision and regular drainage, which can easily lead to safety hazards if the user forgets to drain the water. When draining condensed water to the outside of the machine body, you can generally choose to drain it directly into the sewer or into an external container. If you choose to drain it directly into the sewer, the dehumidifier's direct drainage pipe is relatively short, so it needs to be installed near the sewer to achieve continuous drainage without manual supervision. This places significant restrictions on location, making it difficult to adapt to complex room conditions, and the installation cost is high when it requires breaking walls to lay pipes. If you choose to drain it into an external container, the use of the external container is also limited by the container's own volume. The external container is easy to overturn and still requires manual supervision and regular drainage, which is relatively inconvenient. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an external water tank for a dehumidifier, which can realize continuous and automatic drainage of the dehumidifier without the need for manual supervision.

[0005] The present invention is achieved through the following technical solutions:

[0006] An external water tank for a dehumidifier, comprising:

[0007] The water tank body includes a water inlet and a drainage interface. The water inlet is connected to the drainage outlet of the dehumidifier, and the drainage interface is externally connected to a drainage pipe. A water storage tank is provided in the water tank body, and the water storage tank is connected to the water inlet for receiving water discharged when the dehumidifier is working. The water tank body is provided with a circuit compartment, and the circuit compartment is provided with a power supply module and a socket interconnected with the power supply module. The plug of the power supply module is connected to an external power supply to obtain power, and the socket is connected to the plug of the dehumidifier to supply power.

[0008] The water pump is installed in the circuit compartment, and the water inlet pipe of the water pump is connected to the water tank, and the water outlet pipe of the water pump is connected to the drainage interface;

[0009] At least one float switch, which is installed in the water tank and includes a float. When the float is at a preset high position, the float switch triggers a high position signal, and when the float is at a preset low position, the float switch triggers a low position signal.

[0010] The electric control board is installed in the circuit compartment and is connected to the water pump and float switch signals at the same time;

[0011] When the dehumidifier is working and draining water into the water tank, the float rises with the water level. When the float reaches the preset high position, the float switch triggers a high-level signal and sends a high-level signal to the electronic control board. The electronic control board receives the high-level signal and controls the water pump to start pumping water so that the water in the water tank is discharged through the drain interface. At the same time, the float drops with the water level; when the float reaches the preset low position, the float switch triggers a low-level signal and sends a low-level signal to the electronic control board. The electronic control board receives the low-level signal and controls the water pump to stop pumping water.

[0012] Furthermore, at least one float switch is installed on a bracket on one side of the water tank, and the float switch is arranged away from the water inlet.

[0013] Furthermore, the at least one float switch includes a pair of float switches, and the pair of float switches are arranged in a vertical direction.

[0014] Furthermore, a horizontally placed partition is provided in the water tank body, and the partition and the side wall and cover of the water tank body together form a circuit compartment with an enclosed space, and the water pump, socket, electric control board and power supply module are all arranged in the circuit compartment.

[0015] Furthermore, the water inlet pipe of the water pump is connected to a water extraction pipe, and the water extraction port of the water extraction pipe is not higher than a preset low position of a float switch located below.

[0016] Furthermore, a pair of probes are installed on the partition and are electrically connected to the electric control board. When the water level in the water tank submerges the lower edges of the probes, the probes are turned on and send signals to the electric control board to stop the socket from supplying power to the dehumidifier.

[0017] Furthermore, a floating component is provided in the water tank body, and the floating component is connected to the electric control board signal. When the probe fails, the floating component can send a signal to the electric control board to stop the socket from supplying power to the dehumidifier.

[0018] Furthermore, the floating assembly includes a floating part, a magnetic switch and a rotating shaft. The magnetic switch and the rotating shaft are both arranged on the side of the partition facing the water tank, and the magnetic ring switch is electrically connected to the electronic control board. The floating part is set to a first initial position and a second trigger position and can rotate around the rotating shaft between the first initial position and the second trigger position as pushed by the liquid level in the water tank.

[0019] Furthermore, a trigger slope is formed on the upper part of the floating part. When the probe fails and the floating part rotates to the second trigger position, the trigger slope contacts the magnetic switch and triggers the magnetic switch to turn on. The magnetic switch sends a signal to the electrical control board to stop the socket from supplying power to the dehumidifier.

[0020] Furthermore, the lower edge of the probe is higher than a preset high position of the float switch located above it, and when the water level rises to the lower edge of the probe, the float is located between the first position and the second position and does not trigger the magnetic switch.

[0021] Compared with the prior art, the advantages of the dehumidifier external water tank provided by the present invention are:

[0022] 1. The external water tank of the present invention is integrated with a power supply module and a socket. The socket is electrically connected to the plug of the dehumidifier, and the dehumidifier is powered on or off through the control of the electric control board to ensure power safety.

[0023] 2. The external water tank of the present invention mainly controls the start and stop of the water pump according to the high and low position signals of the float switch by setting an electric control panel, so as to realize automatic continuous drainage or shutdown of the dehumidifier without manual supervision.

[0024] 3. By setting up a combination of a water pump and an external drain pipe, the limitations of conventional room scenarios and sewer distances are broken, allowing the dehumidifier to be deployed in complex scenarios such as rooms far away from sewers, making it easy to use.

[0025] 4. By setting up a pair of probes and floating components as double protection for the dehumidifier and its external water tank, when the float switch fails, it can effectively avoid the safety hazard caused by the water level in the water tank being too high and overflowing due to continuous drainage of the dehumidifier.

[0026] 5. By setting up partitions to form a physically isolated circuit compartment and placing live components (power supply module, electronic control board, water pump, etc.) in the circuit compartment, the safety risk of water entering the live components is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A top view of an external water tank of a dehumidifier according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of an external water tank of a dehumidifier according to one embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the working state of an external water tank of a dehumidifier according to an embodiment of the present invention. Figure 1 ;

[0030] Figure 4 This is a schematic diagram of the working state of an external water tank of a dehumidifier according to an embodiment of the present invention. Figure 2 ;

[0031] Figure 5 This is a schematic diagram of the working state of an external water tank of a dehumidifier according to an embodiment of the present invention. Figure 3 ;

[0032] Figure 6 This is a schematic diagram of the working state of an external water tank of a dehumidifier according to an embodiment of the present invention. Figure 4 .

[0033] Figure 7 This is a circuit principle block diagram of an external water tank of a dehumidifier according to an embodiment of the present invention.

[0034] Figure 8 This is a logic flow chart of an external water tank of a dehumidifier according to an embodiment of the present invention.

[0035] Explanation of the numbers: 1. Water tank body; 11. Water inlet; 12. Drain interface; 13. Water storage tank; 14. Suction pipe; 141. Suction port; 15. Partition; 16. Circuit compartment; 2. Water pump; 21. Water pump inlet pipe; 22. Water pump outlet pipe; 3. Float switch; 31. Float; 32. First bracket; 4. Floating assembly; 41. Floating part; 411. Trigger slope; 42. Magnetic switch; 43. Rotating axis; 5. Probe; 51. Lower edge of probe; 6. Socket; 7. Electronic control board; 8. Power supply module. DETAILED DESCRIPTION

[0036] The following is a further non-restrictive detailed description of the technical solution of the invention in conjunction with the preferred embodiments and the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] like Figure 1As shown, an external water tank of a dehumidifier according to one embodiment of the present invention is used to be externally connected to the dehumidifier and includes a water tank body 1, a water pump 2, at least one float switch 3 and an electric control board 7. The water tank body 1 includes a water inlet 11 and a drainage interface 12. The water inlet 11 can be connected to the drainage pipe of the dehumidifier's own water tank (not shown) or directly connected to the drainage port of the dehumidifier (not shown). The drainage interface 12 is externally connected to a drainage pipe (not shown), the length of which can be adjusted according to specific needs. Through the combination of the water pump and the external drainage pipe, the conventional room scene and the distance limit to the sewer are broken through, and the dehumidifier can be deployed in complex scenes such as rooms far away from the sewer, which is very convenient to use. A water storage tank 13 is provided in the water tank body 1, and the water storage tank 13 is connected to the water inlet 11 for receiving water discharged when the dehumidifier is working. A horizontal partition 15 is installed within the water tank body 1. Together with the sidewalls and cover of the water tank body 1, the partition 15 forms a sealed circuit compartment 16. The water pump 2 is installed within the circuit compartment 16, with its inlet pipe 21 connected to the pumping pipe 14, and its outlet pipe 22 connected to the drain port 12. A float switch 3 is mounted on a bracket on one side of the water tank 13. The float switch 3 includes a pair of vertically arranged floats 31. When the floats 31 are at a preset high position, the float switch 3 triggers a high-position signal. When the floats 31 are at a preset low position, the float switch 3 triggers a low-position signal. The electronic control board 7 is connected to both the water pump 2 and the float switch 3. When the dehumidifier drains water into the water storage tank 13 through the water inlet 11 of the external water tank, the pair of floats 31 rises with the water level. When the floats 31 reach a preset high position, the float switch 3 triggers a high-level signal and sends a high-level signal to the electronic control board 7. The electronic control board 7 receives the high-level signal and controls the water pump 2 to start pumping, discharging the water in the water storage tank 13 through the drain interface 12. At the same time, the floats 31 descend with the water level. When the floats 31 reach a preset low position, the float switch 3 triggers a low-level signal and sends a low-level signal to the electronic control board 7. The electronic control board 7 receives the low-level signal and controls the water pump 2 to stop pumping. By using the electronic control board 7 to receive the high and low level signals of the float switch 3 to control the start and stop of the water pump 2, the dehumidifier can be automatically and continuously drained or shut down without manual supervision.

[0038] like Figure 2 As shown, the water tank body 1 is integrated with a power supply module 8 (see Figure 7 ), the power supply module 8 is electrically connected to an external socket via a plug. The water tank body 1 is also provided with a socket 6 connected to the power supply module 8. The power supply module 8 supplies power to the dehumidifier via the socket 6 connected to the dehumidifier's plug. The electronic control board 7 controls the power on and off of the power supply module 8. By integrating the power supply module 8 and the socket 6 and electrically connecting them to the dehumidifier's plug, the dehumidifier can be powered on and off, ensuring electrical safety.

[0039] Further, such as Figure 3 As shown, a horizontally positioned partition 15 is provided within the water tank 1 of the present invention. Together with the sidewalls and cover of the water tank 1, the partition 15 forms a sealed circuit compartment 16. The live component water pump 2, the electronic control board 7, the power supply module 8, and the socket 6 are all housed within the circuit compartment 16. This prevents the live components from being soaked due to leaks or overflows caused by rising water levels, potentially creating safety hazards. By separating the circuit compartment 16 from the water tank 13, the partition 15 effectively prevents splashing onto the live components during water inflow, potentially damaging them and creating safety hazards.

[0040] Furthermore, the water inlet pipe 21 of the water pump 2 is connected to the water extraction pipe 14 , and the water extraction port 141 of the water extraction pipe 14 is not higher than a preset low position of the float switch 3 located below.

[0041] like Figure 3 and Figure 4 As shown, the float switch 3 is mounted on the side wall of the water tank 13, and is positioned away from the water inlet 11. Specifically, a first bracket 32 ​​is fixedly connected to the side wall of the water tank 13, and the float switch 3 is fixed to the first bracket 32. By using the first bracket 32 ​​to secure the float switch 3 to the side wall of the water tank 13, the float switch 3 is prevented from losing balance and floating in the water during drainage, thereby affecting detection effectiveness. By positioning the float switch 3 away from the water inlet 11, water flow interference can be reduced, improving detection effectiveness.

[0042] To increase the water level travel of the water tank 13, in this embodiment, the at least one float switch 3 is provided as a pair, and the pair of float switches 3 is arranged vertically. It is worth noting that in other embodiments, the at least one float switch 3 may be provided as one or more, and the specific number can be selected based on the height of the water tank 13 selected by the user.

[0043] Furthermore, when the dehumidifier drains water into the water storage tank 13, the float 31 rises with the water level. When and only when both floats 31 reach the preset high position, that is, when both float switches 3 trigger the high position signal, the electric control board 7 receives the two high position signals and controls the water pump 2 to start pumping water. The water is discharged through the pumping pipe 14, the water pump 2, the drainage interface 12 and the drainage pipe (not shown), causing the water level to drop, and the float 31 also drops with the water level; when and only when both floats 31 reach the preset low position, that is, when both float switches 3 trigger the low position signal, the electric control board 7 receives the two low position signals and controls the water pump 2 to stop pumping water. The external water tank mainly controls the start and stop of the water pump by setting the electric control board and according to the high and low position signals of the float switch, so as to realize automatic continuous drainage or shutdown of the dehumidifier without manual supervision.

[0044] Specifically, when one of the two float switches 3 fails or both fail simultaneously, the water pump 2 will no longer operate. Specifically, when the upper float switch 3 or both float switches 3 fail simultaneously, the electric control board 7 cannot receive the high-level signal from the float switches 3, and the water pump 2 cannot start pumping water. After the water pump 2 is started, if the lower float switch 3 or both float switches 3 fail simultaneously, the electric control board 7 will continue pumping water because it cannot receive the low-level signal from the float switches 3. When the pumping time of the water pump 2 exceeds a preset value, the delay control program of the water pump 2 integrated in the electric control board 7 intervenes and terminates the operation of the water pump 2, and the water pump 2 will no longer start, thereby preventing dry pumping and increasing the service life of the water pump 2.

[0045] Further references Figure 5 A pair of probes 5 electrically connected to the electric control board 7 are installed on the partition 15, and the lower edge 51 of the probe 5 is higher than the preset high position of the float switch 3 located above.

[0046] In the embodiment, the probe 5 serves as the first level of protection for the dehumidifier and its external water tank. Specifically, when one of the two float switches 3 fails or fails at the same time, the water pump 2 no longer works, the dehumidifier is still in the state of draining water into the external water tank, and the water level in the water tank 13 continues to rise. When the water level in the water tank 13 submerges the lower edges 51 of the probes 5 of a pair of probes 5, the pair of probes 5 is turned on and sends a signal to the electrical control board 7 to stop the socket 6 from supplying power to the dehumidifier, effectively avoiding the safety hazard caused by overflow due to excessive water level caused by continuous drainage of the dehumidifier.

[0047] Further references Figure 6 The water tank body 1 is further provided with a floating assembly 4, which includes a floating member 41, a magnetic switch 42 and a rotating shaft 43. The magnetic switch 42 and the rotating shaft 43 are both provided on the side of the partition 15 facing the water tank 13, and the magnetic switch 42 is electrically connected to the electric control board 7. The floating member 41 is set to the first initial position F (see Figure 4 ) and the second trigger position L (see Figure 6 ) and can rotate around the rotation axis 43 between a first initial position F and a second trigger position L as pushed by the liquid level in the water tank 13.

[0048] When the water level S rises to the lower edge of the probe 5, the floating member 41 is located between the first position F and the second position L and does not trigger the magnetic switch 42 (see FIG. Figure 5 ).

[0049] Among them, the floating part 41 has a trigger slope 411. In this embodiment, the floating component 4 serves as a second layer of protection for the dehumidifier and its external water tank. Specifically, if the probe 5 fails, the water level in the water tank 13 continues to rise. When the floating part 41 rotates to the second position L, the trigger slope 411 of the floating part 41 abuts against the magnetic switch 42 and triggers the magnetic switch 42 to turn on. The magnetic ring switch 42 sends a signal to the electrical control board 7 to stop the socket 6 from supplying power to the dehumidifier, effectively avoiding the safety hazard of overflowing due to excessive water level caused by continuous drainage of the dehumidifier, which causes the live components to be soaked in water.

[0050] By providing a pair of probes 5 and a floating assembly 4 as double protection for the dehumidifier and its external water tank, when the float switch 3 fails, the potential safety hazard caused by overflow due to excessive water level caused by continuous drainage of the dehumidifier can be effectively avoided.

[0051] like Figure 7 As shown, specifically, the circuit connection relationship of the water tank of the present invention is as follows: the power supply module 8 is electrically connected to the socket 6, the water pump 2, and the electric control board 7 respectively; the electric control board 7 is electrically connected to the power supply module 8, the floating component 4, and the probe 5 respectively on the one hand, and is signal-connected to the water pump 2, the float switch 3, and the socket 6 respectively on the other hand; when the power supply module 8 supplies power, it is electrically connected to the water pump 2, the socket 6, and the electric control board 7 respectively, and when the float switch 3 reaches a preset high position or a preset low position as the water level in the water tank 13 changes, it sends a signal to the electric control board 7, and the electric control board 7 starts the water pump 2 when it receives the high position signal of the float switch 3, and stops the water pump 2 when it receives the low position signal of the float switch 3, so that the water level in the water tank 13 is always maintained within a certain appropriate range. , thereby achieving the purpose of automatic drainage; when the float switch 3 fails to operate normally, the water level in the water tank 13 continues to rise. When the water level submerges the lower edges 51 of the pair of probes 5, the pair of probes 5 conduct and send a signal to the electrical control board 7 to stop the socket 6 from supplying power to the dehumidifier; when the probes 5 fail to operate normally, the rising water level drives the float 1 in the float assembly 4 to rotate about the rotation axis 43. When the water level reaches the second position L, the triggering slope 411 of the float 41 contacts the magnetic switch 42, which conducts and sends a signal to the electrical control board 7 to stop the socket 6 from supplying power to the dehumidifier, effectively avoiding the safety hazard of overflowing due to the continuous drainage of the dehumidifier, which could cause the live components to be soaked in water. The provision of the probes 5 and the float assembly 4 thus provides dual protection for the dehumidifier and the external water tank.

[0052] In summary, see Figure 8, corresponding to an external water tank of a dehumidifier of an embodiment of the present invention, its overall working process is as follows: when the external water tank is connected to an external power supply to obtain power, the power supply module 8 and the socket 6 of the external water tank normally power the dehumidifier and the dehumidifier operates normally, the dehumidifier continuously drains water to the water storage tank 13 through the water inlet 11, and the water level in the water storage tank continuously rises. If the float switch 3 operates normally, the float switch 3 rises as the water level rises. When the float switch 3 reaches a preset high position, a double high position signal is sent to the electric control board 7 to control the water pump 2 to start. After the water pump 2 is started, the water level in the water storage tank 13 drops as the water pump 2 operates, and the float switch 3 also drops as the water level drops. When the float switch 3 reaches a preset high position, a double high position signal is sent to the electric control board 7 to control the water pump 2 to start. After the water pump 2 is started, the water level in the water storage tank 13 drops as the water pump 2 works, and the float switch 3 also drops as the water level drops. When the float switch 3 drops to a preset low position, it sends a double low position signal to the electrical control board 7 to stop the water pump 2. If the float switch 3 is not functioning properly, the water level continues to rise until it submerges the lower edge 51 of the probe 5. If the probe 5 is functioning properly, the pair of probes 5 conduct and send a signal to the electrical control board 7 to stop the socket 6 from supplying power to the dehumidifier. If the probe 5 is not functioning properly, the float 41 rotates about the rotation axis 43 as the water level rises. When the float 41 rotates to the second position L, the triggering slope 411 of the float 41 contacts the magnetic switch 42, triggering the magnetic switch 42 to conduct. The magnetic switch 42 sends a signal to the electrical control board 7 to stop the socket 6 from supplying power to the dehumidifier. Therefore, the external water tank of the dehumidifier provided by the present invention controls the start and stop of the water pump 2 by using the electrical control board 7 to receive the high and low position signals of the float switch 3, eliminating the need for manual supervision and achieving automatic and continuous drainage of condensate from the dehumidifier. By connecting an external drain pipe to the drain interface 12, and the length of the drain pipe can be adjusted according to specific needs, the dehumidifier achieves the effect of drainage without distance restrictions. By providing a pair of float switches 3 in the vertical direction, the water level travel of the water storage tank 13 is increased. By providing a pair of probes 5 and a float assembly 4 as dual protection for the dehumidifier and its external water tank, the safety hazard of overflow caused by excessive water levels due to continuous dehumidifier drainage can be effectively avoided in the event of a float switch 3 malfunction. By positioning the float switch 3 away from the water inlet 11, water flow interference can be reduced, improving detection effectiveness. By integrating a delay control program for the water pump 2 within the electronic control panel 7, the pump 2 is automatically stopped when its pumping time exceeds a preset value, preventing dry pumping and extending its service life. Furthermore, the external water tank of the present invention is compatible with all types of dehumidifiers currently on the market, whether equipped with or without a water tank. Simply connect the water inlet 11 of the external water tank to the drain outlet of a dehumidifier with a water tank or a dehumidifier without a water tank. Therefore, the external water tank of the present invention has wide applicability and strong compatibility.

[0053] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An external water tank for a dehumidifier, which is used to be connected to the dehumidifier, characterized in that: The external water tank comprises: A water tank body (1), the water tank body (1) comprising a water inlet (11) and a drainage interface (12), the water inlet (11) being in communication with the drainage outlet of the dehumidifier, the drainage interface (12) being externally connected to a drainage pipe; a water storage tank (13) being provided in the water tank body (1), the water storage tank (13) being in communication with the water inlet (11) for receiving water discharged when the dehumidifier is in operation; the water tank body (1) being provided with a circuit compartment (16), the circuit compartment (16) being provided with a power supply module (8) and a socket (6) interconnected with the power supply module (8), the power supply module (8) being connected to an external power source via a plug to obtain power, the socket (6) being connected to the plug of the dehumidifier; A water pump (2), the water pump (2) being installed in the circuit compartment (16), and the water inlet pipe (21) of the water pump (2) being in communication with the water storage tank (13), and the water outlet pipe (22) of the water pump (2) being in communication with the drainage interface (12); at least one float switch (3), the float switch (3) being mounted on a bracket (32) on one side of the water tank (13), the float switch (3) comprising a float (31), and triggering a high-position signal when the float (31) is at a preset high position, and triggering a low-position signal when the float (31) is at a preset low position; An electric control board (7), the electric control board (7) is installed in the circuit compartment (16) and is simultaneously connected to the water pump (2) and the float switch (3) for signal transmission; When the dehumidifier is working and draining water into the water storage tank (13), the float (31) rises with the water level. When the float (31) reaches the preset high position, the float switch (3) triggers a high position signal and sends a high position signal to the electric control board (7). The electric control board (7) receives the high position signal and controls the water pump (2) to start pumping water so that the water in the water storage tank (13) is discharged through the drainage interface (12). At the same time, the float (31) drops with the water level. When the float (31) reaches the preset low position, the float switch (3) triggers a low position signal and sends a low position signal to the electric control board (7). The electric control board (7) receives the low position signal and controls the water pump (2) to stop pumping water.

2. The external water tank of a dehumidifier according to claim 1, characterized in that: The at least one float switch (3) is mounted on a first bracket (32) on one side of the water storage tank (13), and the float switch (3) is arranged away from the water inlet (11).

3. The external water tank of a dehumidifier according to claim 1, characterized in that: At least one of the float switches (3) comprises a pair of float switches (3), and the pair of float switches (3) are arranged in a vertical direction.

4. The external water tank of a dehumidifier according to claim 1, characterized in that: A horizontally placed partition (15) is provided in the water tank body (1), and the partition (15) together with the side wall and cover plate of the water tank body (1) form a circuit compartment (16) with a closed space, and the water pump (2), the socket (6), the electric control board (7), and the power supply module (8) are all arranged in the circuit compartment (16).

5. The external water tank of a dehumidifier according to claim 1, characterized in that: The water inlet pipe (21) of the water pump (2) is connected to a water extraction pipe (14), and the water extraction port (141) of the water extraction pipe (14) is not higher than a preset low position of the float switch (3) located below.

6. The external water tank of a dehumidifier according to claim 5, characterized in that: A pair of probes (5) are mounted on the partition (15), and the pair of probes (5) are electrically connected to the electric control board (7). When the water level in the water storage tank (13) submerges the lower edges (51) of the probes (5), the pair of probes (5) are turned on and send a signal to the electric control board (7) to stop the socket (6) from supplying power to the dehumidifier.

7. The external water tank of a dehumidifier according to claim 6, characterized in that: A floating component (4) is also provided in the water tank body (1). The floating component (4) is connected to the electric control board (7) by signal. When the probe (5) fails, the floating component (4) can send a signal to the electric control board (7) to stop the socket (6) from supplying power to the dehumidifier.

8. The external water tank of a dehumidifier according to claim 7, characterized in that: The floating assembly (4) comprises a floating member (41), a magnetic switch (42) and a rotating shaft (43). The magnetic switch (42) and the rotating shaft (43) are both arranged on a side of the partition (15) facing the water tank (13), and the magnetic switch (42) is electrically connected to the electric control board (7). The floating member (41) is set to a first initial position (F) and a second trigger position (L) and can rotate around the rotating shaft (43) between the first initial position (F) and the second trigger position (L) as pushed by the liquid level in the water tank (13).

9. The external water tank of a dehumidifier according to claim 7, characterized in that: The floating member (41) is formed with a triggering inclined surface (411). When the probe (5) fails and the floating member (41) rotates to the second position (L), the triggering inclined surface (411) abuts against the magnetic switch (42) and triggers the magnetic switch (42) to be turned on. The magnetic switch (42) sends a signal to the electric control board (7) to stop (the socket 6) from supplying power to the dehumidifier.

10. The external water tank of a dehumidifier according to claim 7, characterized in that: The lower edge (51) of the probe (5) is higher than a preset high position of the float switch (3) located above it, and when the water level rises to the lower edge (51) of the probe (5), the floating member (41) is located between the first position (F) and the second position (L) and does not trigger the magnetic switch (42).

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