CN222210585U - Dehumidifier - Google Patents

Abstract

The utility model relates to a dehumidifier which is characterized by comprising a shell, wherein a compressor, a heat exchanger, a fan, a water collecting tray and a water collecting tank are arranged in the shell, a first water pump is communicated between the water collecting tank and the water collecting tray, a water pipe for externally connecting a second water pump is communicated with the water collecting tank, a first liquid level sensor is arranged in the water collecting tray, and a second liquid level sensor is arranged in the water collecting tank. The dehumidifier is internally provided with the water collecting tray for receiving the condensed water generated by the heat exchanger, and is also provided with the water collecting tank, wherein the water collecting tank is used for continuously and uninterruptedly receiving the condensed water in the water collecting tray, and when the water in the water collecting tank is full, the condensed water can be pumped out through the water pipe and the second water pump for other utilization, so that the condensed water can be recycled to a great extent, the utilization of water resources is improved, the waste of the water resources is reduced, and meanwhile, an automatic flow of continuous dehumidification work and recycling of the condensed water can be formed.

Description

Dehumidifier

Technical Field

The utility model relates to the technical field of dehumidification, in particular to a dehumidifier.

Background

The existing dehumidifier has a water storage tank below the evaporator. When the dehumidifier works, the moisture in the air is condensed and collected in the water storage tank through the evaporator, and then the moisture is directly poured out manually or is led out through a simple drain pipe. For the household small dehumidifier, the water storage tank is of a detachable structure, so that water in the water storage tank can be directly poured out. However, there are large-sized dehumidifiers, in which the water storage tank is of a non-detachable structure or is difficult to disassemble, such as industrial dehumidifiers, and dehumidifiers for buses and buses, and additional drainage structures, such as a simple drain pipe, are required to drain water from the water storage tank. However, when the dehumidifier is full of water, manual water pouring is needed, and if the water pouring is not timely, the dehumidifier cannot continue to play the dehumidification function.

Therefore, in order to solve the problem, the authority bulletin number CN101520214B in the prior art discloses a dehumidifier capable of automatically controlling water level and a water draining method thereof, which is controlled by an electromagnetic water pump, and avoids the phenomenon that the operation is stopped when the water is full before, and the dehumidifier can continuously operate without stopping the operation. However, the above-mentioned dehumidifier directly discharges condensed water, so that the discharged condensed water cannot be recycled, which results in waste of water resources to a certain extent, and there is an improvement.

Disclosure of utility model

In order to overcome at least one of the drawbacks of the prior art described above, according to one aspect of the present utility model, a dehumidifier is provided,

A dehumidifier, comprising:

The water collecting device comprises a shell, a first water pump, a second water pump, a first fan, a second fan, a first water pump, a second water pump and a water tank, wherein the shell is internally provided with a compressor, a heat exchanger, a fan, a water collecting disc and the water collecting disc;

A first liquid level sensor for detecting whether the water in the water collecting disc is at a high liquid level or not is arranged in the water collecting disc; if the water in the water collecting disc is detected to be at a high liquid level, the first water pump is started to pump the water in the water collecting disc into the water collecting tank, otherwise, the first water pump is not started;

The water collecting tank is internally provided with a second liquid level sensor for detecting whether water in the water collecting tank is at a high liquid level or a low liquid level, the second water pump is started and the whole dehumidifier is stopped when the water in the water collecting tank is detected to be at the high liquid level, and the second water pump is stopped and the dehumidifier is started when the water in the water collecting tank is detected to be at the low liquid level.

In an embodiment of the utility model, the first liquid level sensor comprises a first floater driving magnetism and a first magnetic switch matched with the first floater, and the first magnetic switch is arranged at a high liquid level of the water collecting disc;

If the water in the water collecting disc is at a high liquid level, the first floater is close to the first magnetic switch, the first magnetic switch outputs an opening signal, and the controller in the dehumidifier opens the first water pump according to the opening signal of the first magnetic switch.

In one embodiment of the utility model, the inner side wall of the water collecting disc is provided with a guide cavity, the first floater is arranged in the guide cavity and can vertically move in the guide cavity, and the first magnetic switch is arranged on the outer side wall of the water collecting disc.

In an embodiment of the utility model, the first magnetic switch is a reed switch or a hall switch.

In one embodiment of the utility model, the second liquid level sensor comprises a second floater driving magnetism, a second magnetic switch matched with the second floater for use, a third floater with magnetism and a third magnetic switch matched with the third floater for use, wherein the second magnetic switch is arranged at the high liquid level of the water collection tank, and the third magnetic switch is arranged at the low liquid level of the water collection tank;

if the water in the water collection tank is at a high liquid level, the second floater is close to the second magnetic switch, so that the second magnetic switch outputs an opening signal, and a controller in the dehumidifier starts a second water pump according to the opening signal of the second magnetic switch and the dehumidifier is shut down completely;

when the water in the water collection tanks is at a low liquid level, the third floater is close to the third magnetic switch, so that the third magnetic switch outputs a closing signal, and the controller in the dehumidifier closes the second water pump and starts the dehumidifier according to the closing signal of the third magnetic switch.

In an embodiment of the utility model, the second liquid level sensor further comprises a guide pipe, the second magnetic switch and the third magnetic switch are arranged in the guide pipe from top to bottom, and the second floater and the third floater are sleeved outside the guide pipe from top to bottom and can vertically move.

In an embodiment of the utility model, two second limiting rings and two third limiting rings are fixedly arranged on the outer side of the guide pipe, the second floater is arranged between the two second limiting rings, and the third floater is arranged between the two third limiting rings;

the distance between the two second limiting rings is larger than the height of the second floater, and the distance between the two third limiting rings is larger than the height of the third floater.

In an embodiment of the utility model, the second magnetic switch is a reed switch or a hall switch, and/or the third magnetic switch is a reed switch or a hall switch.

In an embodiment of the utility model, the heat exchanger and the fan are horizontally arranged at intervals along the width direction of the casing, the water collecting tray is arranged at the bottom of the heat exchanger, and the water collecting tank, the compressor and the heat exchanger are sequentially arranged at intervals along the length direction of the casing.

In an embodiment of the present utility model, the water collection tank has a capacity three times or more that of the water collection tray.

In summary, the dehumidifier provided by the utility model has the following technical effects:

In order to better recycle the condensed water, the dehumidifier is internally provided with a water collecting tray for receiving the condensed water generated by the heat exchanger, and is also provided with a water collecting tank for continuously and uninterruptedly receiving the condensed water in the water collecting tray, when the water in the water collecting tank is full, the condensed water can be pumped out through a water pipe and a second water pump for other utilization, the condensed water can be recycled to a great extent, the utilization of water resources is improved, the waste of the water resources is reduced, and meanwhile, an automatic flow of continuous dehumidification work and recycling of the condensed water can be formed.

Drawings

FIG. 1 is a schematic view of a dehumidifier according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the internal work piece in the dehumidifier according to the embodiment of the present utility model;

FIG. 3 is a schematic view of an assembly of a water collecting tray, a heat exchanger and a first water pump in a dehumidifier according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of the structure at A in FIG. 3;

fig. 5 is a sectional view showing an internal structure of a water collection tank in the dehumidifier according to the embodiment of the present utility model;

The drawing comprises a 1-shell, a 2-compressor, a 3-heat exchanger, a 4-fan, a 5-water collecting disc, a 51-first liquid level sensor, a 52-first floater, a 53-first magnetic switch, a 54-guiding cavity, a 6-water collecting tank, a 61-second liquid level sensor, a 62-second floater, a 63-third floater, a 64-guiding pipe, a 65-second limiting ring, a 66-third limiting ring, a 7-first water pump and an 8-water passing pipe.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The embodiment of the utility model discloses a dehumidifier, referring to fig. 1-5, and the dehumidifier comprises a shell 1.

The shell 1 is internally provided with a compressor 2, a heat exchanger 3, a fan 4, a water collecting disc 5 and a water collecting tank 6, a first water pump 7 is communicated between the water collecting tank 6 and the water collecting disc 5, and the water collecting tank 6 is communicated with a water pipe 8 for externally connecting a second water pump.

The water collecting disc 5 is internally provided with a first liquid level sensor 51 for detecting whether the water in the water collecting disc 5 is at a high liquid level, if the water in the water collecting disc 5 is detected to be at the high liquid level, the first water pump 7 is started to pump the water in the water collecting disc 5 into the water collecting tank 6, otherwise, the first water pump 7 is not started.

The water collection tank 6 is internally provided with a second liquid level sensor 61 for detecting whether the water in the water collection tank 6 is at a high liquid level or a low liquid level, if the water in the water collection tank 6 is detected to be at the high liquid level, the second water pump is started and the whole dehumidifier is stopped, and if the water in the water collection tank 6 is detected to be at the low liquid level, the second water pump is stopped and the dehumidifier is started.

When specifically using, in order to recycle the comdenstion water better, not only be provided with in this dehumidifier and be used for receiving the water catch bowl 5 of the comdenstion water that heat exchanger 3 produced, still be provided with header tank 6, header tank 6 is used for lasting and incessantly accepting the comdenstion water in the water catch bowl 5, can take out the comdenstion water through water pipe 8 and second water pump after the water in header tank 6 is full and carry out other utilization, can to a great extent cyclic utilization comdenstion water, improve the utilization of water resource, reduce the waste of water resource, the concrete principle of comdenstion water cyclic utilization wherein is:

the dehumidification principle of the compressor 2, the heat exchanger 3, the fan 4 and the water collecting disc 5 in the dehumidifier is that the fan 4 pumps moist air into the dehumidifier, water in the air is condensed into water drops through the heat exchanger 3 at the moment, the water drops become dry air to be discharged out of the dehumidifier, so that the indoor humidity is reduced by circulation, and the condensed water drops can drop into the water collecting disc 5.

On the one hand, the water level in the water collecting tray 5 is detected by the first liquid level sensor 51, and when the water collecting tray is used specifically, the water level when the water collecting tray 5 is full of water can be set to be a high liquid level specifically, and the water level can be set according to specific working conditions. When the first liquid level sensor 51 detects that the water in the water collecting disc 5 is at a high liquid level, the first water pump 7 is started to pump the water in the water collecting disc 5 into the water collecting tank 6 for storage, and when the first liquid level sensor 51 detects that the water in the water collecting disc 5 is not at the high liquid level, the first water pump 7 stops working and pumps water no longer, so that the water is pumped into the water collecting tank 6 repeatedly. It is known that in this process, the produced condensed water is continuously and continuously fed into the water collection tank 6 after being dropped into the water collection tray 5.

On the other hand, the water level of the water collection tank 6 is detected by the second liquid level sensor 61, and in specific use, the water level of the water collection tank 6 when full water is filled may be set to be a high level, the water level of the water collection tank 6 below the high level may be set to be a low level, and the water level may be set according to specific working conditions, for example, the depth of the remaining water level in the water collection tank 6 may be one centimeter, two centimeters, three centimeters, or the like. When the second liquid level sensor 61 detects that the water in the water collecting tank 6 is at a high liquid level, the second water pump is started at the moment, and the whole dehumidifier is stopped to perform dehumidification operation, so that condensed water generated by continuous dehumidification is prevented from escaping the water collecting tank 6, and the short circuit of electric elements is avoided. After the second water pump is started, the water stored in the water collection tank 6 is pumped to other stations to be utilized, for example, the water is used as cooling liquid for heat dissipation of other parts.

Meanwhile, the dehumidification machine is restarted to dehumidify, and the series of operations are not needed to be manually performed and are all automatically processed, so that the arrangement can be realized under the condition that the water collecting tray 5 cannot be detached or is inconvenient to detach, and the plurality of water collecting tanks 6 are used for continuously receiving and storing condensed water in the water collecting tray 5 so as to facilitate the follow-up extraction of the condensed water for recycling, thereby improving the utilization of water resources and reducing the waste of the water resources. And, draw out the comdenstion water from header tank 6, also need not to dismantle header tank 6 just can directly take out, improve the convenience of water resource utilization. Meanwhile, in the whole dehumidification and water pumping process, no manual direct participation is needed, the water collecting tray 5 and the water collecting tank 6 are automatically pumped through the low liquid level or the high liquid level detected by the first liquid level sensor 51 and the second liquid level sensor 61 which are arranged in advance, the dehumidifier can adjust the working state of the dehumidifier according to the specific water level in the water collecting tank 6, the dehumidification work is stopped when the water collecting tank 6 is full, so that water is prevented from escaping, and the dehumidification work is continued when the water level in the water collecting tank 6 is at the low liquid level, so that an automatic flow with continuous dehumidification work and recyclable condensed water is formed.

Wherein, optionally, the capacity of the water collection tank 6 is three times or more the capacity of the water collection tray 5. In this embodiment, the capacity of the water collection tank 6 is larger than the capacity of the water collection tray 5, so that the storage capacity of the water collection tank 6 for condensed water can be improved, more condensed water can be stored, more condensed water can be recycled, and the waste of water resources is further reduced.

Wherein optionally, heat exchanger 3 and fan 4 are arranged along the horizontal interval of the width direction of casing 1, and water collecting tray 5 sets up in the bottom of heat exchanger 3, and header tank 6, compressor 2 and heat exchanger 3 are arranged along the horizontal interval of the length direction of casing 1 in proper order. In the embodiment, the arrangement of the positions can greatly reduce the volume of the whole dehumidifier, and the existing heat exchanger 3 and the existing compressor 2 of the dehumidifier are arranged up and down normally, while the compressor 2 and the heat exchanger 3 of the dehumidifier are arranged on the same horizontal plane, so that practical materials for assembly can be effectively reduced, and the manufacturing cost can be reduced.

Optionally, the first liquid level sensor 51 includes a first magnetic floater 52 driving magnetism and a first magnetic switch 53 matched with the first floater 52, the first magnetic switch 53 is arranged at a high liquid level of the water collecting tray 5, the first floater 52 can lift along with the water level of the water collecting tray 5, if the water in the water collecting tray 5 is at the high liquid level, the first floater 52 is close to the first magnetic switch 53, the first magnetic switch 53 outputs an opening signal, and a controller in the dehumidifier opens the first water pump 7 according to the opening signal of the first magnetic switch 53. If the first float 52 is away from the first magnetic switch 53, the first magnetic switch 53 outputs a closing signal, and the controller in the dehumidifier shuts down the first water pump 7 according to the closing signal of the first magnetic switch 53.

In this embodiment, the first level sensor 51 includes a first float 52 and a first magnetic switch 53, where the first level sensor 51 can detect whether the water in the water collecting tray 5 is at a high level through the first float 52, and the first magnetic switch 53 is an electric switch operated by a magnetic field, and can be a reed switch or a hall switch.

One embodiment of the reed switch is described by a reed switch, wherein the operating principle of the reed switch is that when an external magnetic field approaches, two reeds are magnetized to generate magnetic fields with different polarities, when the magnetic field strength is enough, the two reeds are attracted together, so that the reed switch is conducted, and when the external magnetic field is far away, the reeds are gradually demagnetized and disconnected, and the reed switch is disconnected. Therefore, the characteristic of the magnetic reed switch can be utilized to match the specific water level of the first floater 52 in the water collecting disc 5, and further the working condition of the first water pump 7 is specifically controlled by the controller.

For example, when the first float 52 is at a high liquid level in the water collecting tray 5, the reed switch is turned on and the first water pump 7 is controlled to be started by the controller, whereas the reed switch is turned off and the first water pump 7 is controlled to be stopped by the controller.

In practical application, as the water level in the water collecting tray 5 increases, the first float 52 will also move upwards along with the increase of the water level until the first float 52 moves up to a high level, so that the reed switch is turned on. The magnetic reed switch can be electrically connected with the controller, the controller can be a singlechip, the controller can receive high liquid level information of the magnetic reed switch, and then the first water pump 7 is started, water in the water collecting disc 5 is pumped into the water collecting tank 6, the water level in the water collecting disc 5 can be well controlled, and water in the water collecting disc 5 is prevented from escaping. And, along with the water level in the water collecting disc 5 is fallen, the first floater 52 also can be along with the water level is fallen and is moved downwards until the first floater 52 is moved downwards to be far away from the high liquid level, so that the magnetic reed switch is disconnected, the controller can receive the closing information of the magnetic reed switch, and the first water pump 7 is closed according to the closing information of the magnetic reed switch, so that the water level in the water collecting disc 5 is automatically controlled. Of course, in other embodiments, the first water pump 7 may also be manually turned off.

Another embodiment is illustrated by a hall switch, which specifically may be that one magnetic pole of the first float 52 approaches to it and outputs a low level signal, and the magnetic pole of the first float 52 leaves and outputs a high level signal, and the specific working principle may be that, for example, when the first float 52 is at a high level in the water collecting tray 5, the hall switch outputs a low level signal and controls the first water pump 7 to start through the controller, and otherwise, the hall switch outputs a high level signal and controls the first water pump 7 to stop working through the controller.

In other alternative embodiments, the first liquid level sensor 51 is at least one of a float-type liquid level sensor, a photoelectric liquid level sensor, a capacitive liquid level sensor, an ultrasonic liquid level sensor or a radar sensor, and can also control the water level in the water collecting tray 5, so as to prevent water in the water collecting tray 5 from escaping.

Optionally, the inner side wall of the water collecting tray 5 is provided with a guiding cavity 54, the first floater 52 is arranged in the guiding cavity 54 and can vertically move in the guiding cavity 54, and the first magnetic switch 53 is arranged on the outer side wall of the water collecting tray 5. In this embodiment, the guiding cavity 54 is specifically provided on the inner side wall of the water collecting disc 5 to prevent the first float 52 from randomly moving in the water collecting disc 5, but can move up and down along with the water level in the guiding cavity 54, so as to better cooperate with the first magnetic switch 53 for use, and more accurately detect the water level of the water collecting disc 5.

Wherein optionally, the first magnetic switch 53 is arranged on the outer side wall of the position of the water collecting disc 5 relative to the guiding cavity 54, so that the first floater 52 can be prevented from falling out of the sensing range of the first magnetic switch 53.

Optionally, the second liquid level sensor 61 includes a second magnetic floater 62 driving magnetism, a second magnetic switch matched with the second floater 62, a third floater 63 with magnetism and a third magnetic switch matched with the third floater 63, wherein the second magnetic switch is arranged at a high liquid level of the water collection tank 6, the third magnetic switch is arranged at a low liquid level of the water collection tank 6, the second floater 62 and the third floater 63 can lift along with the water level of the water collection tray 5, if water in the water collection tank 6 is at the high liquid level, the second floater 62 is close to the second magnetic switch, so that the second magnetic switch outputs an opening signal, and a controller in the dehumidifier starts the second water pump and stops the dehumidifier according to the opening signal of the second magnetic switch.

When the water in the water collection tanks 6 is at a low liquid level, the third floater 63 is close to the third magnetic switch, so that the third magnetic switch outputs a closing signal, and the controller in the dehumidifier turns off the second water pump and starts the dehumidifier according to the closing signal of the third magnetic switch.

In this embodiment, the second liquid level sensor 61 may be a multi-point float liquid level sensor, that is, two points of detection of the second liquid level sensor 61 are specifically, the water in the water collection tank 6 is at a high liquid level and a low liquid level, the second float 62 and the second magnetic switch may be specifically configured to detect whether the water in the water collection tank 6 is at a high liquid level, and the third float 63 and the third magnetic switch may detect whether the water in the water collection tank 6 is at a low liquid level.

The second magnetic switch and the third magnetic switch can also be specifically a magnetic reed switch or a Hall switch.

For example, in practical application, as the water level in the water collection tank 6 rises to reach a high level, when the second floater 62 approaches to the second magnetic switch, the magnetic force generated by the second floater 62 penetrates through the nonmagnetic wall of the second floater 62 and the guide tube 64 to make the contacts of the second magnetic switch attract, and the controller is optionally a single-chip microcomputer because the second magnetic switch is electrically connected with the controller, and the controller receives the high level information of the second magnetic switch to further start the second water pump to pump the water in the water collection tank 6. Meanwhile, the controller can control the whole dehumidifier to stop working so as to prevent water in the water collecting tank 6 from escaping.

It should be noted that, as the water level in the water collection tank 6 drops, the second float 62 is far away from the second magnetic switch, so that the second magnetic switch is turned off, and the corresponding operation signal is not specifically set in the controller at this time, so that the second water pump will continue to operate.

Then, along with the water level in the water collection tank 6 drops and can reach low liquid level, the third floater 63 is close to the third magnetic switch, and the magnetic force generated by the third floater 63 can permeate through the nonmagnetic wall of the third floater 63 and the guide pipe 64, so that the contact points of the third magnetic switch are attracted. Meanwhile, the controller can control the whole dehumidifier to start and restart the dehumidification work, so as to form an automatic flow with continuous dehumidification work and recyclable condensate water.

It should be noted that, as the water level in the water collection tank 6 rises, the third float 63 is far away from the third magnetic switch, so that the third magnetic switch is turned off, and at this time, the third magnetic switch is turned off, and no corresponding operation signal is specifically set in the controller, so that the second water pump is not started.

Optionally, the second liquid level sensor 61 further includes a guide tube 64, the second magnetic switch and the third magnetic switch are disposed in the guide tube 64 from top to bottom, and the second float 62 and the third float 63 are sleeved outside the guide tube 64 from top to bottom and can move vertically. In this embodiment, the guide pipe 64 is provided to prevent the second floater 62 and the third floater 63 from being randomly disturbed in the water tank 6, but can move up and down along with the water level in the guide pipe 64, and better cooperate with the second magnetic switch and the third magnetic switch respectively corresponding to each other, so as to more accurately detect the water level in the water tank 6.

Optionally, two second limiting rings 65 and two third limiting rings 66 are fixedly arranged on the outer side of the guide tube 64, the second floats 62 are arranged between the two second limiting rings 65, the third floats 63 are arranged between the two third limiting rings 66, the distance between the two second limiting rings 65 is larger than the height of the second floats 62, and the distance between the two third limiting rings 66 is larger than the height of the third floats 63. In this embodiment, the second float 62 is limited between two second limiting rings 65, which can effectively control the path of the up-and-down movement of the second float 62 to ensure that the second float 62 can work together with the second magnetic switch when the water in the water collection tank 6 is at a high level, and meanwhile, the third float 63 is limited between two third limiting rings 66, which can effectively control the path of the up-and-down movement of the third float 63 to ensure that the third float 63 can work together with the third magnetic switch when the water in the water collection tank 6 is at a low level. It is known that this corresponds to ensuring that the second float 62 can be used in combination with the second magnetic switch, and that the third float 63 can be used in combination with the third magnetic switch.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A dehumidifier which comprises a main body and a plurality of air inlets, characterized by comprising the following steps:

The water collecting device comprises a shell (1), wherein a compressor (2), a heat exchanger (3), a fan (4), a water collecting disc (5) and a water collecting tank (6) are arranged in the shell (1), a first water pump (7) is communicated between the water collecting tank (6) and the water collecting disc (5), and a water pipe (8) for externally connecting a second water pump is communicated with the water collecting tank (6);

a first liquid level sensor (51) for detecting whether the water in the water collecting disc (5) is at a high liquid level is arranged in the water collecting disc (5), if the water in the water collecting disc (5) is detected to be at the high liquid level, the first water pump (7) is started to pump the water in the water collecting disc (5) into the water collecting tank (6), otherwise, the first water pump (7) is not started;

A second liquid level sensor (61) for detecting whether the water in the water collecting tank (6) is at a high liquid level or a low liquid level is arranged in the water collecting tank (6), if the water in the water collecting tank (6) is detected to be at the high liquid level, the second water pump is started and the whole dehumidifier is stopped, and if the water in the water collecting tank (6) is detected to be at the low liquid level, the second water pump is stopped and the dehumidifier is started.

2. A dehumidifier according to claim 1, characterized in that the first level sensor (51) comprises a first float (52) that is magnetically driven and a first magnetic switch (53) that is used in conjunction with the first float (52), the first magnetic switch (53) being arranged at the high level of the water collection tray (5);

If the water in the water collecting disc (5) is at a high liquid level, the first floater (52) is close to the first magnetic switch (53), the first magnetic switch (53) outputs an opening signal, and the controller in the dehumidifier opens the first water pump (7) according to the opening signal of the first magnetic switch (53).

3. A dehumidifier according to claim 2, characterized in that the inner side wall of the water collection tray (5) is provided with a guide chamber (54), the first float (52) is arranged in the guide chamber (54) and is vertically movable in the guide chamber (54), and the first magnetic switch (53) is arranged on the outer side wall of the water collection tray (5).

4. A dehumidifier according to claim 2, characterized in that the first magnetic switch (53) is a reed switch or a hall switch.

5. A dehumidifier according to claim 1, characterized in that the second level sensor (61) comprises a second float (62) with magnetic properties, a second magnetic switch cooperating with the second float (62), a third float (63) with magnetic properties and a third magnetic switch cooperating with the third float (63), the second magnetic switch being arranged at a high level of the water collection tank (6) and the third magnetic switch being arranged at a low level of the water collection tank (6);

If the water in the water collection tank (6) is at a high liquid level, the second floater (62) is close to the second magnetic switch, so that the second magnetic switch outputs an opening signal, and a controller in the dehumidifier starts a second water pump according to the opening signal of the second magnetic switch and the dehumidifier is shut down completely;

When the water in the water collection tanks (6) is at a low liquid level, the third floater (63) is close to the third magnetic switch, so that the third magnetic switch outputs a closing signal, and the controller in the dehumidifier closes the second water pump and starts the dehumidifier according to the closing signal of the third magnetic switch.

6. The dehumidifier according to claim 5, wherein the second liquid level sensor (61) further comprises a guide pipe (64), the second magnetic switch and the third magnetic switch are arranged in the guide pipe (64) from top to bottom, and the second floater (62) and the third floater (63) are sleeved outside the guide pipe (64) from top to bottom and can move vertically.

7. A dehumidifier according to claim 6, characterized in that two second stop rings (65) and two third stop rings (66) are fixedly arranged outside the guide tube (64), the second float (62) is arranged between the two second stop rings (65), and the third float (63) is arranged between the two third stop rings (66);

The distance between the two second limiting rings (65) is larger than the height of the second floater (62), and the distance between the two third limiting rings (66) is larger than the height of the third floater (63).

8. The dehumidifier of claim 5, wherein the second magnetic switch is a reed switch or a hall switch, and/or wherein the third magnetic switch is a reed switch or a hall switch.

9. A dehumidifier according to any one of claims 1-8, wherein the heat exchanger (3) and the fan (4) are horizontally arranged at intervals along the width direction of the casing (1), the water collecting tray (5) is arranged at the bottom of the heat exchanger (3), and the water collecting tank (6), the compressor (2) and the heat exchanger (3) are sequentially arranged at intervals along the length direction of the casing (1).

10. A dehumidifier according to any of claims 1-8, characterized in that the water collection tank (6) has a capacity that is three times or more the capacity of the water collection tray (5).