Water drinking equipment

By introducing a stirring device and a cooling device with frequency control into the drinking water equipment, the problem of uneven temperature of the cold storage liquid was solved, achieving uniform cold storage and energy saving, and extending the service life of the equipment.

CN223830860UActive Publication Date: 2026-01-27FOSHAN SHUNDE MIDEA WATER DISPENSER MFG +1
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Patent Information

Application Number
CN202520278113.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-20
Publication Date
2026-01-27
Estimated Expiration
2035-02-20

AI Technical Summary

Technical Problem

Existing drinking water equipment suffers from uneven temperature distribution during the cold storage process, leading to localized icing and affecting equipment operation and lifespan.

Method used

The stirring device operates according to the temperature of the cold storage liquid in the cold storage tank. Combined with different frequency control of the refrigeration unit, the stirring blades achieve uniform cold storage of the liquid, and the machine stops when the target temperature is reached to save energy.

Benefits of technology

It achieves uniform cold storage of the cold storage liquid, prevents local icing, improves cold storage efficiency, reduces energy consumption, and enhances the service life and reliability of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses drinking water equipment which comprises a refrigerating device, a stirring device and a cold storage box, the refrigerating device comprises an evaporator, and the evaporator is arranged in the cold storage box and used for providing cold energy for the cold storage box; the stirring device is arranged in the cold storage box and used for working according to the temperature of cold storage liquid in the cold storage box so that the cold storage liquid can conduct uniform cold storage. Therefore, the stirring device works according to the temperature of the cold storage liquid in the cold storage box, uniform cold storage of the cold storage liquid is achieved, the local icing phenomenon is prevented, the cold storage efficiency is further improved, energy consumption is reduced, the service life of equipment is remarkably prolonged, and the reliability of the equipment is remarkably improved.
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Description

Technical Field

[0001] This utility model relates to the field of cold storage technology, and in particular to a drinking water device. Background Technology

[0002] To meet people's demand for cold drinks, refrigeration technology is widely used in various drinking water equipment. These devices are typically equipped with refrigeration units that use refrigerant circulation to achieve a cooling effect, providing users with cold or iced water. However, most drinking water equipment uses a single refrigeration system, which usually includes components such as a compressor, condenser, and evaporator, cooling the water through refrigerant circulation. But during the cold storage process, uneven temperature distribution of the stored liquid often occurs. This uneven temperature distribution not only leads to excessively low temperatures in some areas but can also cause localized icing. Localized icing not only affects the normal operation of the drinking water equipment but can also damage the equipment itself, thus shortening its lifespan. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this utility model is to provide a drinking water device that uses a stirring device to operate according to the temperature of the cold storage liquid in the cold storage tank. This not only achieves uniform cold storage of the liquid, preventing localized freezing, but also further improves cold storage efficiency, reduces energy consumption, and significantly enhances the service life and reliability of the equipment.

[0004] To achieve the above objectives, this utility model provides a drinking water device, which includes a refrigeration device, a stirring device, and a cold storage tank. The refrigeration device includes an evaporator, which is disposed inside the cold storage tank to provide cooling capacity to the cold storage tank. The stirring device is disposed inside the cold storage tank and operates according to the temperature of the cold liquid stored in the cold storage tank to ensure uniform cooling of the cold liquid.

[0005] The drinking water equipment proposed in this utility model uses a stirring device that operates according to the temperature of the cold storage liquid in the cold storage tank. This not only achieves uniform cold storage of the cold storage liquid and prevents local freezing, but also further improves the cold storage efficiency, reduces energy consumption, and significantly enhances the service life and reliability of the equipment.

[0006] In addition, the drinking water device according to the present invention may also include the following additional technical features:

[0007] In some examples, the stirring device includes a stirring motor and stirring blades, the stirring motor being used to control the rotation of the stirring blades.

[0008] In some examples, the evaporator is arranged around the axis of the stirring blades.

[0009] In some examples, the drinking water device further includes a drinking water line disposed between the stirring blade and the evaporator, and arranged around the axis of the stirring blade.

[0010] In some examples, the cold storage tank includes a water tank cover with a first through hole and a second through hole. The first through hole is connected to the inlet of the drinking water pipeline, and the second through hole is connected to the outlet of the drinking water pipeline.

[0011] In some examples, the cold storage box also includes an outer shell and an inner box, with insulation material filling the space between the outer shell and the inner box.

[0012] In some examples, the water tank cover is also provided with a third through hole, which is connected to the inner tank and is used to inject the cold storage liquid into the inner tank through the third through hole.

[0013] In some examples, the refrigeration device further includes a condenser and a compressor, which are interconnected. The compressor is used to compress the refrigerant at different operating frequencies according to the temperature of the cold storage liquid in the cold storage tank. The condenser is used to dissipate heat and cool the compressed refrigerant before supplying it to the evaporator to provide cooling capacity to the evaporator.

[0014] In some examples, the cooling device further includes an axial fan with its outlet facing the condenser for dissipating heat from the condenser.

[0015] In some examples, the drinking water equipment also includes a water level detection device, which is installed inside the cold storage tank to detect the water level information of the cold storage liquid.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a block diagram of the drinking water device according to an embodiment of the present utility model;

[0018] Figure 2 This is a structural schematic diagram of a drinking water device according to one embodiment of the present invention;

[0019] Figure 3 This is a structural schematic diagram of a drinking water device according to one embodiment of the present invention;

[0020] Figure 4 This is a structural schematic diagram of a drinking water device according to one embodiment of the present invention.

[0021] Figure label:

[0022] The water supply equipment includes: a refrigeration unit 100, a stirring unit 200, a cold storage tank 300, an evaporator 101, a stirring motor 201, stirring blades 202, a water supply pipeline 301, a water tank cover 302, a first through hole 303, a second through hole 304, an outer shell 305, an inner box 306, insulation material 307, a third through hole 308, a condenser 102, a compressor 103, an axial fan 104, a water level detection device 400, a temperature sensor 500, a first water inlet connector 501, a water outlet connector 502, and a second water inlet connector 503. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] The following describes a drinking water device according to an embodiment of the present invention with reference to the accompanying drawings.

[0025] Figure 1 This is a block diagram of the drinking water device according to an embodiment of the present utility model.

[0026] Specifically, in some embodiments of this utility model, such as Figure 1 As shown, the drinking water equipment 1000 includes a refrigeration device 100, a stirring device 200, and a cold storage tank 300. The refrigeration device 100 includes an evaporator 101, which is installed inside the cold storage tank 300 to provide cooling capacity to the cold storage tank 300. The stirring device 200 is installed inside the cold storage tank 300 and operates according to the temperature of the cold liquid in the cold storage tank 300 to ensure uniform cold storage of the cold liquid.

[0027] Specifically, in this embodiment, such as Figure 2As shown, the drinking water equipment 1000 includes a refrigeration unit 100, a stirring unit 200, and a cold storage tank 300. The refrigeration unit 100 includes an evaporator 101, which is disposed within the cold storage tank 300 to provide cooling capacity. A temperature sensor 500 is also installed within the cold storage tank 300 to obtain the temperature of the cold storage liquid in the cold storage tank 300 when the refrigeration unit 100 is in operation. The cold storage liquid can preferably be a brine solution or a eutectic salt solution, etc. Furthermore, this invention does not impose specific limitations on the selection of the cold storage liquid.

[0028] The compressor 103, condenser 102, and evaporator 101 are interconnected. The compressor 103 compresses the refrigerant, and the condenser 102 cools the compressed refrigerant before supplying it to the evaporator 101, thus providing cooling capacity. After obtaining the temperature of the cold storage liquid, if the temperature of the cold storage liquid is higher than a first preset temperature, the operating frequency of the refrigeration device 100 is determined to be the first preset frequency. The operating frequency of the refrigeration device 100 is the operating frequency of the compressor 103. The first preset temperature is preferably 10 degrees Celsius, and the first preset frequency is preferably 4200 revolutions per minute. This allows the compressor 103 in the refrigeration device 100 to operate at the first preset frequency.

[0029] When the temperature of the cold storage liquid is greater than a second preset temperature and less than or equal to a first preset temperature, the operating frequency of the refrigeration device 100 is determined to be the second preset frequency, which is less than the first preset frequency. The operating frequency of the refrigeration device 100 is the operating frequency of the compressor 103. The second preset temperature is preferably 5 degrees Celsius, and the second preset frequency is preferably 3500 revolutions per minute. This allows the compressor 103 in the refrigeration device 100 to be controlled to operate at the second preset frequency.

[0030] When the temperature of the cold storage liquid is greater than a third preset temperature and less than or equal to a second preset temperature, the operating frequency of the refrigeration device 100 is determined to be the third preset frequency, which is less than the second preset frequency. The operating frequency of the refrigeration device 100 is the operating frequency of the compressor 103. The third preset temperature can preferably be 1 degree Celsius, and the third preset frequency can preferably be 2800 revolutions per minute. This allows the compressor 103 in the refrigeration device 100 to be controlled to operate at the third preset frequency.

[0031] When the temperature of the cold storage liquid is greater than a fourth preset temperature and less than or equal to a third preset temperature, the operating frequency of the refrigeration device 100 is determined to be the fourth preset frequency, which is less than the third preset frequency. The operating frequency of the refrigeration device 100 is the operating frequency of the compressor 103. The fourth preset temperature can preferably be -2.5 degrees Celsius, and the fourth preset frequency can preferably be 2000 revolutions per minute. This allows the compressor 103 in the refrigeration device 100 to be controlled to operate at the fourth preset frequency.

[0032] When the temperature of the cold storage liquid is less than or equal to the fourth preset temperature, it indicates that the temperature of the cold storage liquid has reached the target temperature and refrigeration is no longer needed. At this time, the refrigeration device 100 is controlled to be in a shutdown state, that is, the operating frequency of the refrigeration device 100 is controlled to be zero, thereby achieving the purpose of energy saving and consumption reduction. It should be noted that this utility model does not specifically limit the values ​​of the first preset temperature, the second preset temperature, the third preset temperature, the fourth preset temperature, the first preset frequency, the second preset frequency, the third preset frequency, and the fourth preset frequency.

[0033] After the refrigeration device 100 is in a stopped state, the current temperature of the cold storage liquid is acquired in real time by the temperature sensor 500. When the current temperature of the cold storage liquid is greater than a third preset temperature, the refrigeration device 100 is controlled to operate, thereby improving refrigeration efficiency while saving energy and reducing consumption. It should be noted that when the temperature of the cold storage liquid is greater than the third preset temperature but less than or equal to the second preset temperature, the operating frequency of the refrigeration device 100 is determined to be the third preset frequency, thus controlling the refrigeration device 100 to operate at the third preset frequency. The third preset temperature can preferably be 1 degree Celsius, and the third preset frequency can preferably be 2800 revolutions per minute. When the temperature of the cold storage liquid is greater than a fourth preset temperature but less than or equal to the third preset temperature, the operating frequency of the refrigeration device 100 is determined to be the fourth preset frequency, thus controlling the refrigeration device 100 to operate at the fourth preset frequency. The fourth preset temperature can preferably be -2.5 degrees Celsius, and the fourth preset frequency can preferably be 2000 revolutions per minute.

[0034] A stirring device 200 is installed inside the cold storage tank 300 and is used to operate according to the temperature of the cold storage liquid inside the cold storage tank 300 so that the cold storage liquid is uniformly stored. The stirring device 200 includes a stirring motor 201 and stirring blades 202. The stirring motor 201 is used to control the rotation of the stirring blades 202.

[0035] Specifically, in this embodiment, such as Figure 2As shown, the stirring device 200 includes a stirring motor 201 and stirring blades 202. The stirring motor 201 controls the rotation of the stirring blades 202. By acquiring the temperature of the cold storage liquid, and when the temperature of the cold storage liquid is less than or equal to a second preset temperature, the stirring motor 201 is powered on at a preset frequency. This allows the stirring motor 201 to drive the stirring blades 202 to stir the cold storage liquid, thereby achieving uniform cold storage and preventing rapid cooling that could lead to localized freezing. The second preset temperature is preferably 5 degrees Celsius, and the preset frequency is preferably a periodic operating mode where the stirring motor 201 is powered on for four minutes and then powered off for one minute. Furthermore, this invention does not specifically limit the value of the second preset temperature or the preset frequency. This achieves uniform cold storage of the cold storage liquid and significantly improves energy efficiency.

[0036] Furthermore, in some embodiments of this utility model, such as Figure 3 As shown, the evaporator 101 is arranged around the axis of the stirring blade 202, which enables uniform cooling of the cold storage liquid and significantly improves the energy utilization rate.

[0037] Furthermore, in some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the drinking water equipment 1000 also includes a drinking water pipeline 301, which is arranged between the stirring blade 202 and the evaporator 101 and around the axis of the stirring blade 202. This can improve the stability and reliability of the equipment, achieve uniform cold storage of the cold liquid, and significantly improve the energy consumption utilization rate.

[0038] Furthermore, in some embodiments of this utility model, the cold storage box 300 includes a water tank cover 302, on which a first through hole 303 and a second through hole 304 are provided. The first through hole 303 is connected to the water inlet of the drinking water pipeline 301, and the second through hole 304 is connected to the water outlet of the drinking water pipeline 301.

[0039] Specifically, in this embodiment, the cold storage box 300 includes a water tank cover 302. The water tank cover 302 is provided with a first through hole 303 and a second through hole 304. The first through hole 303 is connected to the water inlet of the drinking water pipeline 301, and the second through hole 304 is connected to the water outlet of the drinking water pipeline 301. In addition, a first water inlet connector 501 is provided above the first through hole 303, and a water outlet connector 502 is provided above the second through hole 304. The first water inlet connector 501 is connected to the clean water outlet of the drinking water pipeline 301 through the first through hole 303, and the water outlet connector 502 is connected to the water outlet of the drinking water pipeline 301 through the second through hole 304.

[0040] Furthermore, in some embodiments of this utility model, the cold storage box 300 further includes an outer shell 305 and an inner box 306, with thermal insulation material 307 filling the space between the outer shell 305 and the inner box 306.

[0041] Specifically, in this embodiment, the cold storage box 300 further includes an outer shell 305 and an inner box 306, with insulation material 307 filling the space between the outer shell 305 and the inner box 306. The insulation material 307 can be insulation foam, rock wool board, or glass wool board, etc. Furthermore, this invention does not impose specific limitations on the selection of the insulation material 307. This improves the insulation performance of the cold storage box 300, achieving the goal of energy saving and consumption reduction.

[0042] Optionally, in this embodiment, the interior of the water tank cover 302 is also filled with insulation material 307, which can be insulation foam, rock wool board, or glass wool board, etc. Furthermore, this invention does not impose specific limitations on the selection of insulation material 307. This further optimizes the insulation performance of the cold storage tank 300, achieving the goal of energy saving and consumption reduction.

[0043] Furthermore, in some embodiments of this utility model, the water tank cover 302 is also provided with a third through hole 308, which is connected to the inner box 306 and is used to inject cold storage liquid into the inner box 306 through the third through hole 308.

[0044] Specifically, in this embodiment, the water tank cover 302 is also provided with a third through hole 308, which is connected to the inner tank 306 and is used to inject cold storage liquid into the inner tank 306 through the third through hole 308. In addition, a second water inlet connector 503 is provided above the third through hole 308. This can improve the convenience of filling the cold storage tank 300 and its heat preservation performance.

[0045] Furthermore, in some embodiments of this utility model, the refrigeration device 100 further includes a condenser 102 and a compressor 103. The compressor 103, the condenser 102 and the evaporator 101 are interconnected. The compressor 103 is used to compress the refrigerant at different operating frequencies according to the temperature of the cold storage liquid in the cold storage tank 300. The condenser 102 is used to dissipate heat and cool the compressed refrigerant before supplying it to the evaporator 101 to provide cooling capacity to the evaporator 101.

[0046] Specifically, in this embodiment, the refrigeration device 100 includes a compressor 103, a condenser 102, and an evaporator 101. The evaporator 101 is located inside the cold storage tank 300, while the compressor 103 and the condenser 102 are located outside the cold storage tank 300. The compressor 103 can compress a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. The compressor 103 then sends the high-temperature, high-pressure gaseous refrigerant to the condenser 102. The gaseous refrigerant in the condenser 102 gradually cools and liquefies into a liquid refrigerant through heat exchange with the outside air. After the liquid refrigerant is depressurized by a throttling device, it enters the evaporator 101. Inside the evaporator 101, the refrigerant rapidly evaporates into a gaseous state. This process requires the absorption of a large amount of heat, thereby gradually lowering the temperature of the cold storage liquid in the cold storage tank 300, achieving the purpose of cold storage.

[0047] It should be noted that the refrigerant compression process based on the temperature of the cold storage liquid in the cold storage box 300 through different operating frequencies includes: after obtaining the temperature of the cold storage liquid, when the temperature of the cold storage liquid is greater than the first preset temperature, determining the operating frequency of the compressor 103 as the first preset frequency, thereby controlling the compressor 103 in the refrigeration device 100 to operate at the first preset frequency.

[0048] When the temperature of the cold storage liquid is greater than the second preset temperature and less than or equal to the first preset temperature, the operating frequency of the compressor 103 is determined to be the second preset frequency. The second preset frequency is less than the first preset frequency, so that the compressor 103 in the refrigeration device 100 can be controlled to operate at the second preset frequency.

[0049] When the temperature of the cold storage liquid is greater than the third preset temperature and less than or equal to the second preset temperature, the operating frequency of the compressor 103 is determined to be the third preset frequency. The third preset frequency is less than the second preset frequency, so that the compressor 103 in the refrigeration device 100 can be controlled to operate at the third preset frequency.

[0050] When the temperature of the cold storage liquid is greater than the fourth preset temperature and less than or equal to the third preset temperature, the operating frequency of the compressor 103 is determined to be the fourth preset frequency. The fourth preset frequency is less than the third preset frequency, so that the compressor 103 in the refrigeration device 100 can be controlled to operate at the fourth preset frequency.

[0051] When the temperature of the cold storage liquid is less than or equal to the fourth preset temperature, it indicates that the temperature of the cold storage liquid has reached the target temperature and refrigeration is no longer needed. At this time, the compressor 103 is controlled to be in a shutdown state, that is, the operating frequency of the compressor 103 is controlled to be zero, thereby achieving the purpose of energy saving and consumption reduction. It should be noted that this utility model does not specifically limit the values ​​of the first preset temperature, second preset temperature, third preset temperature, fourth preset temperature, first preset frequency, second preset frequency, third preset frequency, and fourth preset frequency.

[0052] Furthermore, in some embodiments of this utility model, the refrigeration device 100 further includes an axial fan 104, the air outlet of which is disposed toward the condenser 102 for dissipating heat from the condenser 102.

[0053] Specifically, in this embodiment, the refrigeration device 100 further includes an axial fan 104 with its outlet facing the condenser 102. The axial fan 104 generates airflow by rotating its blades to rapidly cool and liquefy the gaseous refrigerant in the microchannel condenser 102, thereby dissipating heat from the condenser 102.

[0054] Furthermore, in some embodiments of this utility model, the drinking water equipment 1000 also includes a water level detection device 400, which is installed inside the cold storage tank 300 and is used to detect the water level information of the cold storage liquid.

[0055] Specifically, in this embodiment, the drinking water equipment 1000 further includes a water level detection device 400, which is installed inside the cold storage tank 300 to detect the water level information of the cold storage liquid. The water level detection device 400 is preferably a float. This allows the device to detect the water level of the cold storage liquid in the cold storage tank 300 and ensure that the cooling liquid is always maintained at an appropriate level to ensure cooling efficiency. Furthermore, it can prevent damage to related equipment and improve the safety of the drinking water equipment 1000. This invention does not impose specific limitations on the selection of the water level detection device 400.

[0056] In summary, the drinking water equipment proposed in this utility model, through the stirring device operating according to the temperature of the cold storage liquid in the cold storage tank, not only achieves uniform cold storage of the cold storage liquid and prevents local freezing, but also further improves cold storage efficiency, reduces energy consumption, and significantly enhances the service life and reliability of the equipment.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A drinking water device, characterized in that, The drinking water equipment includes a refrigeration device, a stirring device, and a cold storage tank. The refrigeration device includes an evaporator, which is installed inside the cold storage tank to provide cooling capacity to the cold storage tank. The stirring device is installed inside the cold storage tank and operates according to the temperature of the cold liquid in the cold storage tank to ensure uniform cooling of the cold liquid.

2. The drinking water equipment according to claim 1, characterized in that, The stirring device includes a stirring motor and stirring blades, and the stirring motor is used to control the rotation of the stirring blades.

3. The drinking water equipment according to claim 2, characterized in that, The evaporator is arranged around the axis of the stirring blade.

4. The drinking water equipment according to claim 3, characterized in that, The drinking water equipment also includes a drinking water pipeline, which is disposed between the stirring blade and the evaporator and is arranged around the axis of the stirring blade.

5. The drinking water equipment according to claim 4, characterized in that, The cold storage tank includes a water tank cover, which has a first through hole and a second through hole. The first through hole is connected to the inlet of the drinking water pipeline, and the second through hole is connected to the outlet of the drinking water pipeline.

6. The drinking water equipment according to claim 5, characterized in that, The cold storage box also includes an outer shell and an inner box, with insulation material filling the space between the outer shell and the inner box.

7. The drinking water equipment according to claim 6, characterized in that, The water tank cover is also provided with a third through hole, which is connected to the inner tank and is used to inject the cold storage liquid into the inner tank through the third through hole.

8. The drinking water equipment according to claim 1, characterized in that, The refrigeration device further includes a condenser and a compressor. The compressor, the condenser, and the evaporator are interconnected. The compressor is used to compress the refrigerant at different operating frequencies according to the temperature of the cold storage liquid in the cold storage tank. The condenser is used to dissipate heat and cool the compressed refrigerant before supplying it to the evaporator to provide cooling capacity to the evaporator.

9. The drinking water equipment according to claim 8, characterized in that, The refrigeration device also includes an axial fan, the air outlet of which is directed toward the condenser for dissipating heat from the condenser.

10. The drinking water equipment according to claim 1, characterized in that, The drinking water equipment also includes a water level detection device, which is installed inside the cold storage tank and is used to detect the water level information of the cold storage liquid.