Waterway system for ice maker and terminal filtering ice maker

Abstract

The embodiment of the utility model provides a waterway system for an ice maker and the ice maker with terminal filtration. The waterway system comprises a water storage tank, an upper water tank and a water inlet pipe used for conveying water in the water storage tank to the upper water tank, the waterway system further comprises a filter, the filter is arranged in the upper water tank, the inlet end of the filter is arranged in a water inlet of the upper water tank, and the outlet end of the filter is arranged in a water outlet of the upper water tank. The filter is arranged on the water inlet pipe, so that water from the water inlet pipe firstly enters the filter to be filtered and then enters the upper water tank, and a water outlet of the upper water tank is connected with an ice making bucket of the ice maker. The filter is arranged at the terminal of the whole waterway system, so that filtered water is directly used for making ice, the risk of pollution is reduced, and made ice blocks are always kept clean.

Description

Technical Field

[0001] The present application belongs to the technical field of ice making machines, and in particular relates to an ice making machine with a water system and terminal filtration. Background Art

[0002] Common ice makers with filtration typically install a filter in the water tank or water storage tank, then pipe the filtered water throughout the refrigeration system. However, during this process, the filtered water must pass through various pipes, pumps, and storage tanks before reaching the ice-making unit and making ice. However, over time, these pipes, pumps, and storage tanks can accumulate impurities, scale, and bacteria. Since these impurities are generated after filtration, they can be directly transported to the ice-making unit, affecting the purity of the ice.

[0003] For example, the multifunctional small ice maker provided by the patent application with authorization announcement number CN2888365Y has a water filter installed between the ice storage basket and the inner tank. The filtered water needs to flow into the ice-making terminal through the drain pipe, the water pump inlet pipe, the water pump and the water pump outlet pipe in sequence. Since it passes through multiple pipes and equipment, the probability of secondary contamination of the water quality is increased. Moreover, the filter is set under the ice storage basket. It is necessary to drain the water in the ice maker first and then take out the ice storage basket to replace the filter, which is inconvenient to operate. Utility Model Content

[0004] In view of at least one of the above problems in the prior art, an object of the embodiments of the present application is to provide an ice maker with a water system and terminal filtration for an ice maker.

[0005] The technical solution adopted in the embodiment of the present application is that the water system for the ice maker includes a water storage tank, an upper water tank and a water inlet pipe for transporting the water in the water storage tank to the upper water tank. The water system also includes a filter. The filter is arranged in the upper water tank, and the inlet end of the filter is arranged in the water inlet of the upper water tank, so that the water from the water inlet pipe first enters the filter for filtration and then enters the upper water tank. The water outlet of the upper water tank is connected to the ice bucket of the ice maker.

[0006] In the embodiment of the present application, the filter is arranged in the upper water tank at the end of the entire water system, so that the filtered water can be directly used for ice making, reducing the risk of contamination and achieving the effect of keeping the produced ice cubes clean at all times.

[0007] In an optional embodiment, the filter is installed in the upper water tank in a plug-in manner through the tank opening of the upper water tank, which makes it easy to replace the filter and improves convenience.

[0008] In an optional embodiment, the upper water tank is positioned near the top of the ice maker. The ice maker housing is provided with an insertion port corresponding to the opening of the upper water tank and a sealing cover assembly for sealing the insertion port. The filter can be inserted into or removed from the upper water tank via the insertion port. When the filter is inserted into the upper water tank, the sealing cover assembly seals the filter within the upper water tank. Providing a dedicated filter insertion port on the housing allows for filter replacement at any time without shutting down the machine for drainage. Furthermore, the ice maker can operate normally without a filter installed, satisfying the user's need for ice making without filtering.

[0009] In an optional embodiment, the upper end of the insertion port is flush with the top surface of the housing, the lower end of the insertion port protrudes downward from the bottom surface of the housing and is sunken relative to the housing, and the diameter of the insertion port decreases from top to bottom, so that its inner wall has at least one annular step;

[0010] The sealing cover assembly includes a cover body and a cover seat. The cover seat is seated on one of the annular steps of the insertion port and has a through hole communicating with the insertion port. The cover body is detachably mounted on the cover seat to seal the through hole. The sealing cover assembly has a rational structure and can be stably installed in the insertion port. When the cover body is removed, the filter can be removed.

[0011] In an optional embodiment, a flange is provided on the lower side of the cover seat, surrounding the through hole and extending downwardly out of the insertion port;

[0012] The upper water tank has two ribs around its opening, and the flange on the cover seat is embedded between the two ribs. The two ribs and the flange form a dustproof structure that effectively prevents external dust from entering the upper water tank and ensures the cleanliness of the ice making water.

[0013] In an optional embodiment, the top of the cover seat is recessed downward to form an annular cavity surrounding the upper opening of the through hole, and a locking groove is provided on the cavity wall of the annular cavity;

[0014] The cover body is provided with a protrusion. When the cover body is placed in the annular cavity, the protrusion can enter the locking groove through the notch of the locking groove. When the cover body is rotated until the protrusion enters the locking end of the locking groove, the cover body is locked to the cover base and covers the through hole. The matching method between the cover body and the cover base is reasonable and reliable, so that the cover body can be stably connected to the cover base and is easy to remove from the cover base.

[0015] In an optional embodiment, the cover is provided with an indicator mark; the housing is provided with a locking position and an unlocking position around the insertion port. When the cover is placed in the annular concave cavity of the cover base and the cover is rotated until the indicator mark thereon points to the locking position, the cover is locked to the cover base. When the cover is rotated until the indicator mark thereon points to the unlocking position, the cover can be removed from the cover base to open the insertion port. In this way, the user can understand whether the cover is locked to the cover base or can be removed from the cover base by observing the position pointed by the indicator mark on the cover.

[0016] In an optional embodiment, the filter's inlet protrudes from the filter's bottom end, and at least one sealing ring is provided around the inlet from top to bottom. When the filter is inserted into the upper water tank, the inlet is inserted into the water inlet of the upper water tank, and the sealing ring fits tightly against the inner wall of the water inlet. The sealing ring seals the gap between the filter's inlet and the water inlet of the upper water tank, preventing unfiltered water from directly entering the upper water tank and improving the filtration effect.

[0017] In an optional embodiment, the annular step for supporting the cover base is provided with a limiting hole and a first threaded hole. The bottom of the cover base is provided with a limiting post and a second threaded hole. The second threaded hole corresponds one-to-one with the first threaded hole. The limiting post is inserted and limited in the limiting hole. The corresponding second threaded hole and the first threaded hole are respectively provided with screws for fixing the cover base to the housing. The limiting post and multiple screws ensure that the cover base is installed in a unique position on the top cover.

[0018] A terminal-filtered ice maker includes a housing and a refrigeration system disposed within the housing, and further includes the water system for the ice maker described in any of the above embodiments, wherein the water inlet of the upper water tank is connected to a water storage tank via an inlet pipe, and the water outlet of the upper water tank of the water system is connected to an ice bucket of the refrigeration system via an outlet pipe. The ice maker of the present application, due to its terminal-filtered water system, can ensure the purity of ice-making water, ensuring the safety and hygiene of the ice cubes produced even when the ice maker is operating for extended periods of time.

[0019] Compared with the prior art, the beneficial effects of the embodiments of the present application are: the present application sets the filter at the terminal (end) of the entire water system, so that the filtered water can be directly used for ice making, reducing the risk of pollution, and the ice cubes produced always remain clean; and by setting a special insertion port for the filter, there is no need to stop the machine for drainage, and the filter can be replaced at any time; considering that users have the need to use it without a filter, the present application can allow the ice maker to work normally even without inserting the filter, thereby improving the flexibility of use.

[0020] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0021] This application describes an overview of various implementations or examples of the technology, and is not a comprehensive disclosure of the full scope or all of the features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. The drawings illustrate various embodiments generally by way of example and not limitation, and together with the description and claims, serve to explain the claimed embodiments. Where appropriate, like reference numerals are used throughout the drawings to refer to the same or similar parts.

[0023] Figure 1 This is a schematic diagram of a water system according to an embodiment of the present application used in an ice maker.

[0024] Figure 2 This is a cross-sectional exploded view of the upper water tank, filter and sealing cover assembly of an embodiment of the present application.

[0025] Figure 3 and Figure 4 They are partial cross-sectional views of the water system in different embodiments of the present application.

[0026] Figure 5 for Figure 4 Enlarged view of part A.

[0027] Figure 6 This is a schematic diagram of the cover body in the open state according to an embodiment of the present application.

[0028] Figure 7 This is an exploded view of the sealing cover assembly according to an embodiment of the present application.

[0029] Figure 8 This is a three-dimensional diagram of the cover body of an embodiment of the present application.

[0030] Reference numerals:

[0031] 1-water storage tank; 2-water tank; 21-tank; 22-tank cover; 23-water inlet; 24-water outlet; 25-tank opening; 26-bone position; 27-clip; 3-water inlet pipe; 4-filter; 41-inlet end; 42-handle; 43-sealing ring; 5-top cover; 51-insertion port; 511-annular step; 5111-limiting hole; 5112-first threaded hole; 52-locking Position; 53-unlocking position; 6-sealing cover assembly; 61-cover body; 611-bump; 612-rotating part; 613-indicator mark; 62-cover seat; 621-through hole; 622-annular cavity; 6221-locking groove; 623-flange; 624-flange; 625-limiting column; 626-second threaded hole; 627-screw; 7-water outlet pipe; 8-water pump; 9-ice bucket. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Unless otherwise defined, the technical or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0034] In order to keep the following description of the embodiments of the present application clear and concise, detailed descriptions of known functions and known components are omitted in this application.

[0035] The present application embodiment provides a water system for an ice maker. Figure 1As shown, the water system includes a water storage tank 1, a header water tank 2, and a water inlet pipe 3 for conveying water from the water storage tank 1 to the header water tank 2. The water system also includes a filter 4, which is disposed within the header water tank 2. The inlet end 41 of the filter 4 is disposed within the water inlet 23 of the header water tank 2, so that water from the water inlet pipe 3 first enters the filter 4 for filtration before entering the header water tank 2. The water outlet 24 of the header water tank 2 is connected to the ice bucket 9 of the ice maker.

[0036] In the embodiment of the present application, the filter 4 is installed at the terminal of the entire water system, and the filtered water is directly used for ice making, eliminating the contamination of the ice making water during the transportation process of the water system.

[0037] In some embodiments, the filter 4 is pluggable and removable from the upper water tank 2 via the tank opening 25 of the upper water tank 2. The pluggable filter 4 allows for periodic replacement of the filter 4 when the ice maker is operating for extended periods, ensuring that the ice maker can always produce safe and hygienic ice cubes.

[0038] In some embodiments, as Figures 1 to 4 As shown, the upper water tank 2 is positioned near the top of the ice maker. The ice maker's housing is provided with an insertion port 51 corresponding to the tank opening 25 of the upper water tank 2, and a sealing cover assembly 6 for sealing the insertion port 51. The filter 4 can be inserted into or removed from the upper water tank 2 via the insertion port 51. When the filter 4 is inserted into the upper water tank 2, the sealing cover assembly 6 seals the filter 4 within the upper water tank 2. The upper water tank 2 is strategically positioned within the ice maker. When the filter 4 needs to be replaced, the sealing cover assembly 6 can be opened to remove or insert the filter 4. Furthermore, when the ice maker does not require a filter, the ice maker can function normally even without the filter 4 inserted into the upper water tank 2, enhancing the convenience and flexibility of the ice maker.

[0039] like Figure 1 As shown, the upper water tank 2 and the ice bucket 9 can be arranged at the top of the casing in a left-right parallel and close manner to shorten the distance from the upper water tank 2 to the ice bucket 9, so that the upper water tank 2 can be directly connected to the ice bucket 9 through a shorter pipe to avoid contamination of the filtered water.

[0040] like Figure 2As shown, the casing includes a top cover 5 located at the top of the ice maker, an insertion port 51 provided on the top cover 5, the upper end of the insertion port 51 being flush with the top surface of the top cover 5, and the lower end of the insertion port 51 protruding downward from the bottom surface of the top cover 5 and being sunken relative to the top cover 5. The diameter of the insertion port 51 decreases from top to bottom, so that its inner wall has at least one annular step 511. A sealing cover assembly 6 is provided within the insertion port 51 and supported on the annular step 511. The top surface of the sealing cover assembly 6 is flush with the top surface of the top cover 5. In this way, the sealing cover assembly 6 can be stably maintained in the insertion port 51 to cover the insertion port 51, while not being exposed to the outside, thereby making the casing structure regular.

[0041] like Figures 3 to 7 As shown, the sealing cover assembly 6 includes a cover body 61 and a cover seat 62. The cover seat 62 is seated on an annular step 511 of the insertion port 51 and fixed to the annular step 511. The bottom surface of the cover seat 62 is in contact with the stepped surface of the annular step 511. The cover seat 62 has a through hole 621 that communicates with the insertion port 51. The cover body 61 is detachably mounted on the cover seat 62 to seal the through hole 621. The sealing cover assembly 6 is structurally sound. When the cover body 61 is removed, the filter 4 can be removed through the insertion port 51 and the through hole 621.

[0042] Furthermore, the cover 61 can be connected or disassembled with the cover base 62 by rotating. For example, the cover 61 and the cover base 62 are locked together by threads or buckles 27. In some embodiments, Figure 6 and Figure 7 As shown, the top of the cover seat 62 is recessed downward to form an annular cavity 622 surrounding the upper opening of the through hole 621. The annular cavity 622 has a cavity wall only on the side away from the upper opening, so that the annular cavity 622 is connected to the upper opening. The cavity wall of the annular cavity 622 is provided with a locking groove 6221. Figure 6 and Figure 7 The cover 61 is provided with a protrusion 611. When the cover 61 is placed in the annular cavity 622, the protrusion 611 can enter the locking groove 6221 through the notch of the locking groove 6221. When the cover 61 is rotated until the protrusion 611 enters the locking end of the locking groove 6221, the cover 61 is locked on the cover base 62 and covers the through hole 621. The matching method between the cover 61 and the cover base 62 is reasonable and reliable, so that the cover 61 can be stably connected to the cover base 62 and the cover 61 can be easily removed from the cover base 62.

[0043] like Figure 6 and Figure 7As shown, the locking grooves 6221 may include two, and the two locking grooves 6221 are symmetrically arranged on the cavity wall of the annular concave cavity 622 of the cover seat 62 about the axis of the through hole 621. Two protrusions 611 are provided on the cover body 61. The shape of the locking groove 6221 is approximately L-shaped, with one end of the L-shape extending upward to the upper end periphery of the cavity wall to form a notch of the locking groove 6221, and the other end of the L-shape extending laterally on the cavity wall to form a locking end. When the cover body 61 needs to be closed, the two protrusions 611 on the cover body 61 are aligned with the two notches of the two locking grooves 6221 and the cover body 61 is pressed downward to move the protrusions 611 to the corners of the L-shape. The cover body 61 is then rotated to move the protrusions 611 on the cover body 61 to the locking end, thus completing the installation of the cover body 61 on the cover seat 62. When the filter 4 needs to be replaced or removed, the cover body 61 is rotated in the opposite direction and lifted upward.

[0044] Continue to combine Figure 6 and Figure 7 The top of the cover body 61 is recessed downward to form a cavity, and a cross-shaped rotating portion 612 is provided at the bottom of the cavity so that the user can rotate the cover body 61 by operating the rotating portion 612, thereby improving the convenience of use.

[0045] The type and specific structure of the filter 4 are not specifically limited in this embodiment of the application. For example, various filters 4 used in ice makers in the prior art can be used. In order to facilitate the plugging and unplugging operation of the filter 4, such as Figure 6 and Figure 7 As shown, a straight-line handle 42 is provided on the top of the filter 4. When the filter 4 is inserted into the upper water tank 2, the handle 42 is located in the through hole 621 of the cover seat 62. In this way, when the cover body 61 is removed and the cover seat 62 is opened, the handle 42 can be directly grasped, and the filter 4 can be taken out of the upper water tank 2 by pulling the handle 42 upward.

[0046] In some embodiments, as Figures 2 to 4 As shown, the inlet end 41 of the filter 4 protrudes from the bottom end of the filter 4, and at least one sealing ring 43 is sleeved on the outer periphery of the inlet end 41 from top to bottom. When the filter 4 is inserted into the upper water tank 2, the inlet end 41 is inserted into the water inlet 23 of the upper water tank 2, and the sealing ring 43 fits tightly against the inner wall of the water inlet 23. In this way, when the filter 4 is in place, the sealing ring 43 seals the gap between the inlet end 41 of the filter 4 and the water inlet 23 of the upper water tank 2, preventing unfiltered water from directly entering the upper water tank 2, thereby improving the filtering effect.

[0047] The inlet end 41 of the filter 4 can be cylindrical, and the water inlet 23 of the upper water tank 2 is a cylindrical hole that matches the shape of the inlet end 41. This is not only convenient for processing and manufacturing, but also improves the sealing performance of the two after they are matched. The number of sealing rings 43 can be selected and determined according to the needs of implementation, such as Figure 4 and Figure 5 As shown, two sealing rings 43 are provided in this embodiment.

[0048] In some embodiments, as Figure 3 As shown, the bottom end of the cover seat 62 is provided with a circle of flange 623 surrounding the through hole 621 and extending downward from the insertion port 51, and the bottom end of the flange 623 rests on the part of the upper water tank 2 surrounding its box opening 25; in this way, external dust and the like can be prevented from entering the upper water tank 2 through the box opening 25.

[0049] like Figure 4 and Figure 5 As shown, the underside of the cover 62 is provided with a flange 624 that surrounds the through-hole 621 and extends downward from the insertion port 51. The upper water tank 2 has two rings of ribs 26 surrounding its opening 25. The flange 624 on the cover 62 fits into the annular groove formed between the two rings of ribs 26. The two rings of ribs 26 and the flange 624 form a "C"-shaped dustproof structure, effectively preventing external dust from entering the upper water tank 2 and ensuring the cleanliness of the ice-making water.

[0050] like Figure 4 As shown, the upper water tank 2 includes a tank body 21 and a tank cover 22. The tank cover 22 is detachably connected to the tank body 21 via a buckle 27. A tank opening 25 is provided on the tank cover 22. The water inlet 23 is provided on the bottom side of the tank body 21 and is opposite to the tank opening 25 on the tank cover 22. The water outlet 24 is provided on the bottom side of the tank body 21 near the ice bucket 9 to shorten the length of the pipe connecting the water outlet 24 and the ice bucket 9.

[0051] In some embodiments, as Figure 6 As shown, the cover body 61 is provided with an indicator mark 613, which can be, for example, an arrow. A locking position 52 and an unlocking position 53 are provided around the insertion port 51 on the top cover 5. When the cover body 61 is arranged in the annular concave cavity 622 of the cover seat 62, and the cover body 61 is rotated until the indicator mark 613 thereon points to the locking position 52, the cover body 61 is locked on the cover seat 62. When the cover body 61 is rotated until the indicator mark 613 thereon points to the unlocking position 53, the cover body 61 can be removed from the cover seat 62 to open the through hole 621 and the insertion port 51. In this way, it is convenient for the user to operate accurately. By observing the position pointed to by the indicator mark 613 on the cover body 61, it can be understood whether the cover body 61 is in a state of being locked on the cover seat 62 or in a state of being able to be removed from the cover seat 62 (i.e., unlocked).

[0052] In some embodiments, as Figure 7As shown, a limiting hole 5111 and a first threaded hole 5112 are provided on the annular step 511 for supporting the cover seat 62, and a limiting column 625 and a second threaded hole 626 are provided at the bottom of the cover seat 62. The second threaded holes 626 and the first threaded holes 5112 are multiple and correspond one to one. The limiting hole 5111 and the limiting column 625 are both one, and the limiting column 625 is inserted and limited in the limiting hole 5111. Screws 627 are respectively provided in the corresponding first threaded holes 5112 and the second threaded holes 626, and the cover seat 62 is fixed to the top cover 5 of the casing by the screws 627. The limiting column 625 and multiple screws 627 ensure that the cover seat 62 is installed in a unique position on the top cover 5, thereby ensuring that when the indicator mark 613 on the cover body 61 points to the locking position 52, the cover body 61 is locked on the cover seat 62, and when the indicator mark 613 on the cover body 61 points to the unlocking position 53, the cover body 61 is released from the cover seat 62, and the cover body 61 can be removed from the cover seat 62.

[0053] The present application also provides an ice maker with terminal filtration, comprising a housing, a refrigeration system disposed within the housing, and a water system for the ice maker according to any of the above-described embodiments. The ice maker of the present application, with its terminal filtration water system, ensures clean ice-making water, resulting in safe and hygienic ice cubes.

[0054] like Figure 1 As shown, the water inlet 23 of the upper water tank 2 is connected to the water storage tank 1 via the water inlet pipe 3. To ensure smooth flow of water from the water storage tank 1 into the upper water tank 2, a water pump 8 can be installed on the water inlet pipe 3 to provide power for water transportation. The water outlet 24 of the upper water tank 2 is connected to the ice bucket 9 of the refrigeration system via the water outlet pipe 7. In other words, the water outlet pipe 7 is the only connection between the upper water tank 2 and the ice bucket 9, ensuring optimal filtration of the water system.

[0055] To make ice cubes, water is first manually added to the water storage tank 1. Once the ice maker begins operating, a water pump 8 pumps the ice-making water from the water storage tank 1. This water is then transported to the water inlet 23 of the upper water tank 2 via the outlet pipe 7. The water first enters the filter 4 within the upper water tank 2. The filter 4, through a sealing ring 43, cooperates with the upper water tank 2 to ensure a seal, ensuring that the ice-making water can only enter the filter 4 for filtration. The filter 4 then flows through the outlet of the filter 4 into the upper water tank 2. The upper water tank 2 is connected to the ice bucket 9 via the outlet pipe 7. The filtered water in the upper water tank 2 then flows directly into the ice bucket 9 for ice making. This application places the filter 4 at the terminal end of the entire water system. The filtered water is then used directly for ice making, reducing the risk of contamination and ensuring that the ice cubes remain clean, effectively solving the problem of controlling the quality of the ice-making water. Furthermore, the ice maker housing of this application is equipped with a dedicated insertion port 51 for the filter 4, allowing the filter 4 to be replaced at any time without shutting down the machine for drainage. Moreover, when the filter 4 is taken out, the normal use of the ice maker is not affected, that is, the ice maker can be used normally without the filter 4 installed, thereby meeting the different needs of customers.

[0056] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. Furthermore, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A water system for an ice maker, comprising a water storage tank (1), an upper water tank (2), and a water inlet pipe (3) for transporting water in the water storage tank (1) to the upper water tank (2), characterized in that: The water system further comprises a filter (4), the filter (4) being arranged in the upper water tank (2), and the inlet end (41) of the filter (4) being arranged in the water inlet (23) of the upper water tank (2), so that water from the water inlet pipe (3) first enters the filter (4) for filtration and then enters the upper water tank (2), and the water outlet (24) of the upper water tank (2) is connected to the ice bucket (9) of the ice maker.

2. The water system for an ice maker according to claim 1, characterized in that: The filter (4) is installed in the upper water tank (2) via the tank opening (25) of the upper water tank (2) in a plug-in manner.

3. The water system for an ice maker according to claim 2, characterized in that: The upper water tank (2) is arranged near the top of the ice maker. The housing of the ice maker is provided with an insertion port (51) corresponding to the tank port (25) of the upper water tank (2) and a sealing cover assembly (6) for sealing the insertion port (51). The filter (4) can be inserted into or removed from the upper water tank (2) via the insertion port (51). When the filter (4) is inserted into the upper water tank (2), the sealing cover assembly (6) seals the filter (4) in the upper water tank (2).

4. The water system for an ice maker according to claim 3, characterized in that: The upper end of the insertion port (51) is flush with the top surface of the housing, and the lower end of the insertion port (51) protrudes downward from the bottom surface of the housing and is sunken relative to the housing. The diameter of the insertion port (51) decreases from top to bottom, so that its inner wall has at least one annular step (511); The sealing cover assembly (6) comprises a cover body (61) and a cover seat (62); the cover seat (62) is seated on one of the annular steps (511) of the insertion port (51) and has a through hole (621) communicating with the insertion port (51); the cover body (61) is detachably arranged on the cover seat (62) for sealing the through hole (621).

5. The water system for an ice maker according to claim 4, characterized in that: The lower side of the cover seat (62) is provided with a flange (624) surrounding the through hole (621) and extending downwardly from the insertion port (51); The upper water tank (2) is provided with two circles of bone positions (26) around its tank opening (25), and the flange (624) on the cover seat (62) is embedded between the two circles of bone positions (26).

6. The water system for an ice maker according to claim 4, characterized in that: The top of the cover seat (62) is recessed downward to form an annular cavity (622) surrounding the upper opening of the through hole (621), and a locking groove (6221) is provided on the cavity wall of the annular cavity (622); The cover body (61) is provided with a protrusion (611). When the cover body (61) is arranged in the annular cavity (622), the protrusion (611) can enter the locking groove (6221) from the notch of the locking groove (6221). When the cover body (61) is rotated until the protrusion (611) enters the locking end of the locking groove (6221), the cover body (61) is locked on the cover seat (62) and covers the through hole (621).

7. The water system for an ice maker according to claim 6, characterized in that: The cover body (61) is provided with an indicator mark (613); the housing is provided with a locking position (52) and an unlocking position (53) around the insertion port (51); when the cover body (61) is arranged in the annular concave cavity (622) of the cover seat (62), and the cover body (61) is rotated until the indicator mark (613) thereon points to the locking position (52), the cover body (61) is locked on the cover seat (62); when the cover body (61) is rotated until the indicator mark (613) thereon points to the unlocking position (53), the cover body (61) can be removed from the cover seat (62) to open the insertion port (51).

8. The water system for an ice maker according to claim 1, characterized in that: The inlet end (41) of the filter (4) protrudes from the bottom end of the filter (4), and at least one sealing ring (43) is sleeved on the outer periphery of the inlet end (41) from top to bottom. When the filter (4) is inserted into the upper water tank (2), the inlet end (41) is inserted into the water inlet (23) of the upper water tank (2), and the sealing ring (43) is tightly fitted to the inner wall of the water inlet (23).

9. The water system for an ice maker according to claim 4, characterized in that: A limiting hole (5111) and a first threaded hole (5112) are provided on the annular step (511) for supporting the cover seat (62); a limiting column (625) and a second threaded hole (626) are provided at the bottom of the cover seat (62); the second threaded hole (626) corresponds to the first threaded hole (5112) one-to-one; the limiting column (625) is inserted and limited in the limiting hole (5111); correspondingly, screws (627) for fixing the cover seat (62) to the housing are respectively provided in the second threaded hole (626) and the first threaded hole (5112).

10. A terminal filtration ice maker, comprising a housing and a refrigeration system arranged in the housing, characterized in that: The invention further comprises a water system for an ice maker according to any one of claims 1 to 9, wherein the water inlet (23) of the upper water tank (2) is connected to the water storage tank (1) via a water inlet pipe (3), and the water outlet (24) of the upper water tank (2) of the water system is connected to the ice making bucket (9) of the refrigeration system via a water outlet pipe (7).

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