Water tank applied to water purifier

Abstract

The utility model relates to the technical field of drinking water equipment, in particular to a water tank applied to a water purifier, which is characterized in that a light sterilization module is arranged in a water tank main body, the light sterilization module comprises a light-emitting element and a transparent outer cover sleeved outside the light-emitting element, and the transparent outer cover adopts a concave lens structure so as to emit light rays emitted by the light-emitting element in the water tank main body; the inner wall of the water tank body is made of glass, and the outer wall of the water tank body is coated with a metal film layer which is used for reflecting light penetrating through the inner wall. Under the condition that the volume and the luminous power of the light sterilization module are not increased, the light scattering effect of the concave lens structure of the transparent outer cover and the light reflection effect of the metal film layer of the water tank are utilized, and sterilization light rays emitted by the light sterilization module are spread inside the water tank more quickly, so that the utilization rate of the luminous power is improved, and the service life of the water tank is prolonged. Meanwhile, water in the water tank is isolated from the metal film layer through the inner wall of the water tank, and the water quality of the water tank is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drinking water equipment, in particular to a water tank used in a water purifier. Background Art

[0002] The large-flow water purifiers on the market are limited by the size and cost of the built-in pumps. Most of them use water tanks to store water to achieve the purpose of large-flow water output. In order to avoid the growth of bacteria in the water tank, the water in the water tank needs to be sterilized periodically.

[0003] In the prior art, an ultraviolet sterilization module is usually used to sterilize the water in the water tank, but the ultraviolet light attenuation in the water tank is very large, and the power reduction makes the sterilization ability insufficient. In order to ensure the sterilization ability, it is necessary to use a larger packaged ultraviolet lamp or a combination of multiple ultraviolet lamps in the sterilization module. This will cause the size and cost of the sterilization module to increase sharply, which runs counter to the current development direction of small and simple water purifiers, and will bring more energy consumption.

[0004] Based on the shortcomings of the prior art, it is urgent to study a water tank for use in a water purifier to solve the above problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a water tank used for a water purifier. The utility model can utilize the light scattering effect of the concave lens structure of the transparent outer cover and the light reflection effect of the metal film layer on the outer wall of the water tank without increasing the volume and luminous power of the light sterilization module, so as to propagate the sterilization light emitted by the light sterilization module faster inside the entire water tank, so as to reduce light attenuation and improve the utilization rate of light power, thereby effectively improving the sterilization effect of the water tank and achieving the effect of saving energy. At the same time, the water inside the water tank is isolated from the metal film layer through the inner wall of the water tank to ensure the water quality of the water tank.

[0006] The utility model provides a water tank applied to a water purifier, comprising:

[0007] A light sterilization module is provided inside the water tank body, and the light sterilization module comprises: a light emitting element and a transparent outer cover sleeved outside the light emitting element, and the transparent outer cover adopts a concave lens structure to distribute the light emitted by the light emitting element inside the water tank body;

[0008] The inner wall of the water tank body is made of glass, and the outer wall of the water tank body is coated with a metal film layer, and the metal film layer is used to reflect light passing through the inner wall.

[0009] Furthermore, a water inlet is provided at the top of the water tank body, a water outlet is provided at the bottom of the water tank body, and a multi-way pipeline is provided outside the water tank body, and the multi-way pipeline includes: a first port, a second port connected to the water outlet, and a third port connected to the water inlet, the first port is provided with a water intake control valve of the water purifier, and a circulating water pump is provided on the pipeline between the second port and the third port.

[0010] Furthermore, when the light sterilization module is in a sterilization working state and the water intake control valve is in a closed state, the circulating water pump is used to control the liquid inside the water tank body to circulate from the water outlet to the water inlet via the pipeline.

[0011] Furthermore, when the water purifier enters the water intake mode, the light sterilization module starts the sterilization working state, and when the water purifier switches from the water intake mode to the non-water intake mode, the light sterilization module turns off the sterilization working state after a first preset time period.

[0012] Furthermore, when the duration of the water purifier in the non-water intake mode reaches a second preset time, the light sterilization module 2 turns on the sterilization working state every second preset time, and turns off the sterilization working state after a third preset time, and the third preset time is shorter than the second preset time.

[0013] Furthermore, when the duration of the water purifier in the non-water intake mode reaches a fourth preset time, the light sterilization module 2 turns on the sterilization working state every fifth preset time, and turns off the sterilization working state after a sixth preset time. The fifth preset time is shorter than the fourth preset time, the second preset time is shorter than the fifth preset time, and the third preset time is longer than the sixth preset time.

[0014] Furthermore, the multi-way pipeline also includes: a fourth port, which is provided with a drain control valve. When the water purifier is in the non-water intake mode for a duration that reaches the fourth preset duration, the drain control valve opens to allow the liquid inside the water tank body to be discharged through the fourth port. When the water level in the water tank drops to the lowest water level, the drain control valve closes.

[0015] Furthermore, a water level detection module is provided inside the water tank body, and the water level detection module includes: at least three water level probes, each water level probe is used to detect water levels of the water tank at different heights.

[0016] Furthermore, the light sterilization module also includes: a substrate running through the bottom of the water tank body, the light-emitting element and the transparent outer cover are fixed on the upper side of the substrate, and a temperature sensor is provided on the lower side of the substrate, and the temperature sensor is used to detect the temperature of the substrate to detect the working state of the light-emitting element.

[0017] Furthermore, the light emitting element includes an ultraviolet lamp, and the metal film layer includes an aluminum-plated film layer.

[0018] Implementing the embodiments of the utility model has the following beneficial effects:

[0019] The utility model can utilize the light scattering effect of the concave lens structure of the transparent outer cover and the light reflection effect of the metal film layer on the outer wall of the water tank to propagate the sterilization light emitted by the light sterilization module faster throughout the water tank without increasing the volume and light emitting power of the light sterilization module, so as to reduce light attenuation and improve the utilization rate of light power, thereby effectively improving the sterilization effect of the water tank and achieving the effect of saving energy consumption. At the same time, the water inside the water tank is isolated from the metal film layer through the inner wall of the water tank to ensure the water quality of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a water tank provided in this embodiment;

[0022] Figure 2 A schematic diagram of the control logic of a light sterilization module provided in this embodiment;

[0023] Figure 3 A schematic diagram of a normal sterilization logic flow for a water tank provided in this embodiment;

[0024] Figure 4 A schematic diagram of a flow chart of an interval sterilization mode for a water tank provided in this embodiment;

[0025] Figure 5 A schematic diagram of another flow chart of an interval sterilization mode for a water tank provided in this embodiment.

[0026] Among them, the reference numerals in the figure correspond to:

[0027] 1- water tank body; 2- light sterilization module; 3- metal film layer; 4- water inlet; 5- water outlet; 6- multi-way pipeline; 7- water intake control valve; 8- circulating water pump; 9- drainage control valve; 10- water level detection module; 21- light emitting element; 22- transparent outer cover; 23- substrate; 24- temperature sensor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In view of the defects of the prior art, the utility model can achieve that, without increasing the volume and luminous power of the light sterilization module, the sterilization light emitted by the light sterilization module can be propagated faster throughout the water tank by utilizing the light scattering effect of the concave lens structure of the transparent outer cover and the light reflection effect of the metal film layer on the outer wall of the water tank, so as to reduce light attenuation and improve the utilization rate of light power, thereby effectively improving the sterilization effect of the water tank and achieving the effect of saving energy. At the same time, the water inside the water tank is isolated from the metal film layer through the inner wall of the water tank to ensure the water quality of the water tank.

[0031] See attached Figure 1 The present embodiment provides a water tank for a water purifier, comprising: a light sterilization module 2 is arranged inside a water tank body 1, the light sterilization module 2 comprises: a light emitting element 21 and a transparent outer cover 22 which is sleeved outside the light emitting element 21, the transparent outer cover 22 adopts a concave lens structure to distribute the light emitted by the light emitting element 21 inside the water tank body 1; the inner wall of the water tank body 1 is made of glass, and the outer wall of the water tank body 1 is coated with a metal film layer 3, the metal film layer 3 is used to reflect the light passing through the inner wall.

[0032] It should be noted that: in the present embodiment, when the light sterilization module 2 is in the sterilization working state, the light emitting element 21 emits light for sterilization. When the light passes through the transparent outer cover 22 of the concave lens structure, its propagation path will change and it will become scattered light. Since the inner wall of the water tank body is made of glass material with good light transmittance and the outer wall is coated with a metal film layer 3 with extremely low light transmittance, the scattered light can be reflected by the metal film layer 3 to every corner of the water tank body 1, so as to achieve dead angle sterilization of the water tank. Since most of the light remains in the water tank cavity, its light intensity is superimposed with the increase of the opening time of the light sterilization module 2, which can effectively reduce the light attenuation and improve the utilization rate of high light power, thereby effectively improving the sterilization effect of the water tank, and achieving the sterilization effect in a shorter time, and also achieving the effect of saving energy. At the same time, the water inside the water tank is isolated from the metal film layer 3 by the inner wall of the water tank, which can effectively prevent the metal film and water from contacting and polluting the clean water, thereby ensuring the water quality of the water tank.

[0033] In this embodiment, the surface of the light emitting element 21 can be in close contact with the transparent outer cover 22 to conduct heat with water, and the transparent outer cover 22 can prevent the light emitting element 21 from short-circuiting when in contact with water. Specifically, the light emitting element 21 can include: an ultraviolet lamp, and the ultraviolet lamp can include: at least one ultraviolet lamp bead. Preferably, the ultraviolet lamp includes two ultraviolet lamp beads.

[0034] In this embodiment, the metal film layer 3 may include: an aluminum-plated film layer. Specifically, the aluminum-plated film layer may be an aluminum-plated PET film.

[0035] In this embodiment, the inner wall of the water tank body 1 is made of silicon dioxide quartz glass.

[0036] In some possible embodiments, the light sterilization module 2 also includes: a substrate 23 that runs through the bottom of the water tank body 1, a light-emitting element 21 and a transparent outer cover 22 are fixed on the upper side of the substrate 23, and a temperature sensor 24 is provided on the lower side of the substrate 23. The temperature sensor 24 is used to detect the temperature of the substrate 23 to detect the working state of the light-emitting element 21 and protect the light-emitting element 21.

[0037] In some possible embodiments, when the light sterilization module 2 is in the sterilization working state and the temperature sensor 24 detects that the temperature is higher than the preset upper limit temperature, the light sterilization module 2 is turned off; when the light sterilization module 2 is in the sterilization working state and the temperature sensor 24 detects that the temperature is lower than the preset lower limit temperature, the water purifier emits a sterilization fault prompt sound. The preset upper limit temperature is higher than the preset lower limit temperature, which can effectively avoid the problem of overheating and damage of the light-emitting element 21, and after the light-emitting element 21 fails, the user can know in time and replace the new element.

[0038] Specifically, the preset upper limit temperature may be 70° C., the preset lower limit temperature may be 30° C. The thickness of the substrate 23 is relatively thin, and a large amount of heat will be generated when the normal light emitting element 21 works, causing the substrate 23 to heat up. Figure 2 As shown, when the temperature is higher than 70°C, there is a risk of burning out of the light emitting element 21. At this time, the light sterilization module 2 is turned off to cool and protect the light emitting element 21. If the temperature is lower than 70°C, it is further determined whether the temperature is lower than 30°C. If the temperature is lower than 30°C, the temperature remains unchanged or changes very little, indicating that the working state of the light emitting element 21 is abnormal, the light emitting element 21 fails, and the water purifier emits a sterilization failure prompt sound. If the temperature is higher than 30°C, it indicates that the working state of the light emitting element 21 is normal.

[0039] In some possible embodiments, a water inlet 4 is provided at the top of the water tank body 1, a water outlet 5 is provided at the bottom of the water tank body 1, and a multi-way pipeline 6 is provided outside the water tank body 1. The multi-way pipeline 6 includes: a first port, a second port connected to the water outlet 5, and a third port connected to the water inlet 4. The first port is provided with a water intake control valve 7 of the water purifier, and a circulating water pump 8 is provided on the pipeline between the second port and the third port.

[0040] Specifically, the interior of the water tank body 1 is used to store drinkable purified water, the water inlet 4 is the entrance for purified water to enter the water tank, the water outlet 5 is the outlet for purified water to leave the water tank, and the water intake control valve 7 is a control valve for users to take water.

[0041] In some possible embodiments, the water inlet 4 and the water outlet 5 are respectively located on the left and right sides of the water tank body 1. Specifically, the water inlet 4 is located on the left side of the top of the water tank body 1 and the water outlet 5 is located on the right side of the bottom of the water tank body 1, or, the water inlet 4 is located on the right side of the top of the water tank body 1 and the water outlet 5 is located on the left side of the bottom of the water tank body 1, so that the water coming in from the water inlet 4 can stay in the water tank for a longer time to the greatest extent, so as to further achieve the purpose of sterilization.

[0042] In some possible embodiments, when the light sterilization module 2 is in a sterilization working state and the water intake control valve 7 is in a closed state, the circulating water pump 8 is used to control the liquid inside the water tank body 1 to circulate from the water outlet 5 to the water inlet 4 through the pipeline. When the user does not take water and the light sterilization module 2 is working, the circulating water pump 8 pumps water to make the static water in the water tank body 1 flow and become running water, so as to enhance the sterilization effect of the light sterilization module.

[0043] Specifically, the circulating water pump 8 may be a DC water pump.

[0044] In some possible embodiments, a water level detection module 10 is provided inside the water tank body 1, and the water level detection module 10 includes: at least three water level probes, each water level probe is used to detect the water level of the water tank at different heights, and the time and duration of turning on the light sterilization module are determined according to the water level to achieve energy saving.

[0045] Preferably, the water level detection module 10 may include: three water level probes, which are respectively used to detect a first water level, a second water level and a third water level, wherein the height of the first water level is lower than that of the second water level, and the height of the second water level is lower than that of the third water level.

[0046] Preferably, the second water level may be the middle water level of the water tank, the lowest water level of the water tank ≤ the first water level < the second water level, and the second water level < the third water level ≤ the highest water level of the water tank.

[0047] In some possible embodiments, when the water purifier enters the water intake mode, the light sterilization module 2 starts the sterilization working state. When the water purifier switches from the water intake mode to the non-water intake mode, the light sterilization module 2 turns off the sterilization working state after a first preset time.

[0048] In this embodiment, when the light sterilization module 2 is in the sterilization working state, the light emitting element 21 is turned on; when the light sterilization module 2 is in the sterilization working state, the light emitting element 21 is turned off.

[0049] Preferably, the first preset duration may be 1 minute.

[0050] In the related prior art, as long as there is water in the water tank, the water tank will start sterilization, but this will greatly reduce the service life of the light sterilization module 2, and when the user does not take water, sterilization will also waste electricity. In view of the above problems, the normal sterilization logic for the water tank is established in the embodiment of the present application to control the start of the light sterilization module 2. Specifically, Figure 3 As shown, in order to ensure the water output flow of the water purifier, when the water purifier enters the water intake mode (that is, the water intake control valve 7 is opened and the user starts to take water), the light sterilization module 2 immediately starts the sterilization working state. When the water level in the water tank is lower than the second water level, the water tank is started to replenish water. If during the water tank replenishment process, the water purifier switches from the water intake mode to the non-water intake mode (that is, the water intake control valve 7 is closed and the user stops taking water), the water replenishment is stopped when the water level reaches the third water level. The light sterilization module 2 turns off the sterilization working state one minute after the water replenishment stops to ensure that the bacteria in the water tank are completely killed.

[0051] In some possible embodiments, when the duration of the water purifier in the non-water intake mode reaches a second preset duration, the light sterilization module 2 turns on the sterilization working state every second preset duration, and turns off the sterilization working state after a third preset duration, and the third preset duration is shorter than the second preset duration.

[0052] Preferably, the second preset time length may be 30 minutes, and the third preset time length may be 1 minute.

[0053] In the related prior art, if the water purifier is in the non-water-taking mode for a long time, that is, the user does not use the water purifier for a long time, because there is water in the water tank, under suitable conditions, the longer the time, the more bacteria there are in the water tank. When the user opens the water intake control valve 7 to take water for drinking next time, the light sterilization module 2 has not yet started the sterilization working state, and the water has been taken out by the user, causing the user to drink water with excessive bacterial counts. To address the above problems, in the embodiment of the present application, by judging the time when the user has not used the water purifier, an abnormal situation control logic is established synchronously, mainly for the situation where the water purifier has not been used within 3 days and for the situation where the water purifier has not been used for more than 3 days, different ultraviolet lamp control logics are implemented. Specifically, Figure 4 As shown, for the situation where the water purifier has not been used within 3 days: when the water purifier is in the non-water-intake mode for 30 minutes (that is, the user has not used the water purifier for more than 30 minutes), the water purifier starts the interval sterilization mode, and the light sterilization module 2 starts the sterilization working state every 30 minutes, and turns off the sterilization working state after 1 minute, and when the light sterilization module 2 is turned on, the circulating water pump 8 is turned on to control the water inside the water tank body 1 to circulate from the water outlet 5 through the pipeline to the water inlet 4 to achieve water flow sterilization, when the light sterilization module 2 is turned off, the circulating water pump 8 is turned off, and in the interval sterilization mode, if the water purifier switches from the non-water-intake mode to the water-intake mode (that is, the water-intake control valve 7 is opened, and the user starts to take water), the interval sterilization mode is exited and the normal sterilization logic is entered.

[0054] In some possible embodiments, when the duration of the water purifier in the non-water intake mode reaches the fourth preset time, the light sterilization module 2 turns on the sterilization working state every fifth preset time, and turns off the sterilization working state after the sixth preset time. The fifth preset time is shorter than the fourth preset time, the second preset time is shorter than the fifth preset time, and the third preset time is longer than the sixth preset time.

[0055] Preferably, the fourth preset time length may be 3 days, the fifth preset time length may be 1 hour, and the sixth preset time length may be 15 seconds.

[0056] In some possible embodiments, the multi-way pipeline 6 also includes: a fourth port, which is provided with a drain control valve 9. When the water purifier is in a non-water intake mode for a period of time that reaches a fourth preset period of time, the drain control valve 9 opens to allow the liquid inside the water tank body 1 to be discharged through the fourth port. When the water level in the water tank drops to the lowest water level, the drain control valve 9 closes.

[0057] In the related prior art, when a user does not use a water purifier for more than 3 days, some unclean impurities, such as flocs after bacteria are killed, are likely to appear in the water tank. Therefore, if the water purifier is not used for more than 3 days, the water in the water tank body needs to be drained. Specifically, Figure 5 As shown, for the case where the water purifier has not been used for more than 3 days: when the water purifier is in the non-water-intake mode for a continuous period of 3 days (that is, the user has not used the water purifier for more than 3 days), the water purifier starts the drainage mode, and the drainage control valve 9 is opened to discharge the water inside the water tank body 1 through the fourth port. When the water level in the water tank drops to the lowest water level, the drainage control valve 9 is closed, and the water purifier starts the interval sterilization mode. After drainage, the water level in the water tank is very low and there is very little water, but the inside of the water tank is still in a humid state, which is easy to breed bacteria. Therefore, every 1 hour The light sterilization module 2 starts the sterilization working state and turns off the sterilization working state after 15 seconds. When the light sterilization module 2 is turned on, the circulating water pump 8 is turned on to control the water inside the water tank body 1 to circulate from the water outlet 5 through the pipeline to the water inlet 4 to achieve water flow sterilization. When the light sterilization module 2 is turned off, the circulating water pump 8 is turned off. In the interval sterilization mode, if the water purifier switches from the non-water intake mode to the water intake mode (that is, the water intake control valve 7 is opened and the user starts to take water), the interval sterilization mode is exited and the normal sterilization logic is entered.

[0058] In some possible embodiments, when the water purifier is in the drainage mode, the water intake control valve 7 is closed and the drainage control valve 9 is opened; when the water purifier is in the water intake mode, the water intake control valve 7 is opened and the drainage control valve 9 is closed; when the water purifier is in the non-water intake mode, the water intake control valve 7 is closed and the drainage control valve 9 is closed.

[0059] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

[0060] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0061] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A water tank used in a water purifier, characterized in that: include: A light sterilization module (2) is provided inside the water tank body (1), the light sterilization module (2) comprising: a light emitting element (21) and a transparent outer cover (22) sleeved outside the light emitting element (21), the transparent outer cover (22) adopting a concave lens structure to distribute the light emitted by the light emitting element (21) inside the water tank body (1); The inner wall of the water tank body (1) is made of glass, and the outer wall of the water tank body (1) is coated with a metal film layer (3), and the metal film layer (3) is used to reflect light passing through the inner wall.

2. The water tank according to claim 1, characterized in that: The top of the water tank body (1) is provided with a water inlet (4), the bottom of the water tank body (1) is provided with a water outlet (5), and the outside of the water tank body (1) is provided with a multi-way pipeline (6), the multi-way pipeline (6) comprising: a first port, a second port connected to the water outlet (5) and a third port connected to the water inlet (4), the first port is provided with a water intake control valve (7) of the water purifier, and a circulating water pump (8) is provided on the pipeline between the second port and the third port.

3. The water tank according to claim 2, characterized in that: When the light sterilization module (2) is in a sterilization working state and the water intake control valve (7) is in a closed state, the circulating water pump (8) is used to control the liquid inside the water tank body (1) to circulate from the water outlet (5) to the water inlet (4) via the pipeline.

4. The water tank according to claim 2, characterized in that: When the water purifier enters the water intake mode, the light sterilization module (2) starts the sterilization working state, and when the water purifier switches from the water intake mode to the non-water intake mode, the light sterilization module (2) turns off the sterilization working state after a first preset time period.

5. The water tank according to claim 2, characterized in that: When the duration of the water purifier being in the non-water-intake mode reaches a second preset duration, the light sterilization module (2) turns on the sterilization working state every second preset duration, and turns off the sterilization working state after a third preset duration, and the third preset duration is shorter than the second preset duration.

6. The water tank according to claim 5, characterized in that When the duration of the water purifier being in the non-water-intake mode reaches a fourth preset duration, the light sterilization module (2) turns on the sterilization working state every fifth preset duration, and turns off the sterilization working state after a sixth preset duration, the fifth preset duration is shorter than the fourth preset duration, the second preset duration is shorter than the fifth preset duration, and the third preset duration is longer than the sixth preset duration.

7. The water tank according to claim 6, characterized in that The multi-way pipeline (6) also includes: a fourth port, the fourth port is provided with a drainage control valve (9), when the duration of the water purifier being in the non-water intake mode reaches the fourth preset duration, the drainage control valve (9) opens to allow the liquid inside the water tank body (1) to be discharged through the fourth port, and when the water level in the water tank drops to the lowest water level, the drainage control valve (9) closes.

8. The water tank according to any one of claims 1 to 7, characterized in that: A water level detection module (10) is provided inside the water tank body (1), and the water level detection module (10) comprises: at least three water level probes, each of which is used to detect water levels in the water tank at different heights.

9. The water tank according to any one of claims 1 to 7, characterized in that: The light sterilization module (2) further comprises: a base plate (23) penetrating the bottom of the water tank body (1); the light emitting element (21) and the transparent outer cover (22) are fixed on the upper side of the base plate (23); a temperature sensor (24) is provided on the lower side of the base plate (23); the temperature sensor (24) is used to detect the temperature of the base plate (23) so as to detect the working state of the light emitting element (21).

10. The water tank according to any one of claims 1 to 7, characterized in that: The light emitting element (21) comprises an ultraviolet lamp, and the metal film layer (3) comprises an aluminum-plated film layer.

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