Water-cooled coffee grinder

Abstract

This application discloses a water-cooled coffee grinder, relating to the field of coffee grinder technology. The water-cooled coffee grinder includes a lower housing, an upper blade mounting structure, a lower blade mounting structure, an upper blade, and a lower blade. A cooling groove is provided on the side of the upper mounting plate near the upper blade, and a liquid inlet and a liquid outlet are provided on the side of the upper mounting plate. The upper blade covers the cooling groove. The water-cooled coffee grinder also includes a liquid inlet pipe, a liquid outlet pipe, and a coolant storage tank. The liquid inlet pipe, the liquid inlet, the cooling groove, the liquid outlet, the liquid outlet pipe, and the coolant storage tank are sequentially connected. Through the above arrangement, the oxidation of coffee powder can be prevented, and the service life of the upper and lower blades can be extended.

Description

Technical Field

[0001] This application relates to the field of coffee grinder technology, and more particularly to a water-cooled coffee grinder. Background Technology

[0002] Coffee is a common beverage in society. In addition to its stimulating effect, its unique aroma has made it popular with many people. The aforementioned coffee is a beverage made by roasting and grinding coffee beans and then brewing them.

[0003] Existing coffee grinders produce coffee powder that oxidizes significantly, and the upper and lower blades have relatively short lifespans. Utility Model Content

[0004] The purpose of this application is to provide a water-cooled coffee grinder that can prevent accelerated oxidation of coffee grounds and extend the service life of the upper and lower blades.

[0005] This application discloses a water-cooled coffee grinder, which includes a lower housing, an upper blade mounting structure, a lower blade mounting structure, an upper blade, and a lower blade. The lower housing has a lower housing through hole. The lower blade mounting structure includes a lower mounting plate and a lower shaft. The lower shaft is connected to the lower mounting plate near the lower housing. The lower shaft is located inside the lower housing through hole. The lower mounting plate is connected to the lower housing.

[0006] The lower housing of the mill is provided with an open-type annular protrusion. The lower cutter disc is connected to the side of the lower mounting plate away from the lower shaft body. An annular powder outlet space is formed between the inner wall of the open-type annular protrusion and the outer wall of the lower cutter disc.

[0007] The upper blade mounting structure includes an upper mounting plate and an upper shaft body. The upper shaft body is connected to the end of the upper mounting plate away from the lower blade. The upper blade mounting structure abuts against the open-shaped annular protrusion. The upper blade is connected to the side of the upper mounting plate near the lower blade, and a grinding space is formed between the upper blade and the lower blade. The hollow interior of the upper shaft body forms a feeding channel, which is connected to the grinding space.

[0008] A cooling groove is provided on the side of the upper mounting plate near the upper blade disc. An inlet and an outlet are provided on the side of the upper mounting plate. The upper blade disc covers the cooling groove. The water-cooled coffee grinder also includes an inlet pipe, an outlet pipe, and a coolant storage tank. The inlet pipe, the inlet, the cooling groove, the outlet, the outlet pipe, and the coolant storage tank are connected in sequence.

[0009] Optionally, the water-cooled coffee grinder also includes an upper grinding housing, which is connected to the lower grinding housing and encloses the upper blade mounting structure. The upper grinding housing has an upper housing through hole, and the upper shaft body is located inside the upper housing through hole.

[0010] The water-cooled coffee grinder also includes a gap adjustment structure. The outer wall of the gap adjustment structure is threadedly connected to the inner wall of the through hole of the upper housing. The gap adjustment structure abuts against the end of the upper shaft body that is away from the upper mounting plate. The hollow interior of the gap adjustment structure is connected to the feeding channel.

[0011] Optionally, the water-cooled coffee grinder further includes a positioning post and a return spring. The positioning post is located on the side of the lower housing of the grinder near the upper blade mounting structure. The return spring is sleeved on the positioning post. The upper mounting plate has a positioning groove corresponding to the position of the positioning post. Both the positioning post and the return spring are partially located in the positioning groove. The two sides of the return spring abut against the bottom of the positioning groove and the lower housing of the grinder, respectively.

[0012] Optionally, the lower cutter head mounting structure further includes a feeding shaft body and a feeding vane. The feeding shaft body is connected to the side of the lower mounting plate that is away from the lower shaft body. The feeding vane is spirally wrapped around the feeding shaft body, and both the feeding shaft body and the feeding vane are located within the feeding channel.

[0013] Optionally, the water-cooled coffee grinder further includes at least one blade, which is connected to the lower mounting plate and located within the powder dispensing space. The blade rotates with the lower mounting plate to scrape the powder in the powder dispensing space onto the opening of the annular protrusion.

[0014] Optionally, the water-cooled coffee grinder further includes a first bearing and a second bearing, wherein the first bearing is located between the gap adjustment structure and the upper shaft body, and both ends of the first bearing abut against the gap adjustment structure and the upper shaft body, respectively;

[0015] The second bearing is sleeved on the lower shaft body, and the two sides of the second bearing abut against the outer wall of the lower shaft body and the inner wall of the through hole of the lower housing, respectively.

[0016] Optionally, the water-cooled coffee grinder further includes a sealing ring located between the lower mounting plate and the lower housing of the grinder, with both sides of the sealing ring abutting against the lower mounting plate and the lower housing of the grinder, respectively.

[0017] Optionally, the lower housing of the mill is provided with an annular limiting groove, and the annular limiting groove is located on the open annular protrusion; the upper mounting plate is provided with an annular limiting protrusion at the position corresponding to the annular limiting groove, and the outer wall of the annular limiting protrusion abuts against the inner wall of the annular limiting groove.

[0018] Optionally, the water-cooled coffee grinder also includes a feed funnel, the outer wall of which is connected to the inner wall of the gap adjustment structure.

[0019] Optionally, the water-cooled coffee grinder also includes a drive motor, the output end of which is connected to the lower shaft body and is used to drive the lower blade mounting structure to rotate.

[0020] Compared to existing coffee grinder designs, this application features a cooling groove on the side of the upper mounting plate near the upper blade, and an inlet and outlet on the side of the upper mounting plate. The upper blade covers the cooling groove. The inlet pipe, inlet, cooling groove, outlet, outlet pipe, and coolant storage tank are sequentially connected. This allows coolant in the storage tank to enter the cooling groove through the inlet pipe and inlet, and then return to the storage tank through the outlet pipe and outlet pipe. This removes heat from the upper blade and cools both the upper and lower blades, preventing excessive heat generation during grinding that could accelerate coffee powder oxidation and reduce flavor. Furthermore, cooling the upper and lower blades reduces wear and extends their lifespan. Attached Figure Description

[0021] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of a water-cooled coffee grinder according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of an inlet according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a liquid outlet according to an embodiment of this application;

[0025] Figure 4This is a schematic diagram of a drive motor according to an embodiment of this application;

[0026] Figure 5 This is a cross-sectional schematic diagram of an upper cutter head mounting structure and a lower cutter head mounting structure according to an embodiment of this application;

[0027] Figure 6 This is a cross-sectional schematic diagram of a lower mill housing and an upper mill housing according to an embodiment of this application;

[0028] Figure 7 This is an exploded schematic diagram of an upper cutter head mounting structure and a lower mill housing according to an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of a positioning groove according to one embodiment of this application.

[0030] in,

[0031] 10. Water-cooled coffee grinder; 100. Feed hopper; 200. Gap adjustment structure; 300. Upper housing of the grinder; 310. Through hole in the upper housing; 400. Lower housing of the grinder; 410. Through hole in the lower housing; 420. Open-type annular protrusion; 430. Annular limiting groove; 440. Positioning post; 450. Return spring; 500. Upper blade mounting structure; 510. Upper mounting plate; 511. Cooling groove; 512. Liquid inlet; 513. Liquid outlet; 514. Annular limiting protrusion; 520. Upper... Shaft body; 521, positioning groove; 600, lower cutter head mounting structure; 610, lower mounting plate; 611, paddle; 620, lower shaft body; 621, feeding shaft body; 622, feeding vane; 711, upper cutter head; 712, lower cutter head; 721, first bearing; 722, second bearing; 723, sealing ring; 730, powder outlet space; 740, grinding space; 750, feeding channel; 810, liquid inlet pipe; 820, liquid outlet pipe; 830, coolant storage tank; 900, drive motor. Detailed Implementation

[0032] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0033] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0034] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0037] Figure 1 This is a schematic diagram of a water-cooled coffee grinder according to an embodiment of this application. Figure 2 This is a schematic diagram of an inlet according to an embodiment of this application. Figure 3 This is a schematic diagram of a liquid outlet according to an embodiment of this application. Figure 4 This is a schematic diagram of a drive motor according to an embodiment of this application. Figure 5 This is a cross-sectional schematic diagram of an upper cutter head mounting structure and a lower cutter head mounting structure according to an embodiment of this application. Figure 6 This is a cross-sectional schematic diagram of a lower mill housing and an upper mill housing according to an embodiment of this application, in conjunction with... Figures 1-6 As shown, this application discloses a water-cooled coffee grinder 10, which includes a lower housing 400, an upper blade mounting structure 500, a lower blade mounting structure 600, an upper blade 711, and a lower blade 712.

[0038] The lower housing 400 of the mill is provided with a lower housing through hole 410. The lower cutter head mounting structure 600 includes a lower mounting plate part 610 and a lower shaft part 620. The lower shaft part 620 is connected to the side of the lower mounting plate part 610 near the lower housing 400 of the mill. The lower shaft part 620 is located in the lower housing through hole 410. The lower mounting plate part 610 is connected to the lower housing 400 of the mill.

[0039] An open-type annular protrusion 420 is provided on the lower housing 400 of the mill. The lower cutter disc 712 is connected to the side of the lower mounting plate 610 away from the lower shaft body 620. An annular powder outlet space 730 is formed between the inner wall of the open-type annular protrusion 420 and the outer wall of the lower cutter disc 712.

[0040] The upper blade mounting structure 500 includes an upper mounting plate portion 510 and an upper shaft portion 520. The upper shaft portion 520 is connected to the end of the upper mounting plate portion 510 away from the lower blade 712. The upper blade mounting structure 500 abuts against the open-type annular protrusion 420. The upper blade 711 is connected to the side of the upper mounting plate portion 510 near the lower blade 712, and a grinding space 740 is formed between the upper blade 711 and the lower blade 712. The interior of the upper shaft portion 520 is hollow to form a feeding channel 750, which is connected to the grinding space 740.

[0041] The upper mounting plate 510 has a cooling groove 511 on the side near the upper blade 711. The upper mounting plate 510 has a liquid inlet 512 and a liquid outlet 513 on its side. The upper blade 711 covers the cooling groove 511. The water-cooled coffee grinder 10 also includes a liquid inlet pipe 810, a liquid outlet pipe 820, and a coolant storage tank 830. The liquid inlet pipe 810, the liquid inlet 512, the cooling groove 511, the liquid outlet 513, the liquid outlet pipe 820, and the coolant storage tank 830 are connected in sequence.

[0042] For example, the water-cooled coffee grinder 10 can be used to grind coffee beans, and of course it can also be used to grind other materials. Taking the water-cooled coffee grinder 10 as an example of grinding coffee beans, the coffee beans enter the grinding space 740 formed between the upper blade 711 and the lower blade 712 from the feed channel 750. Then, the coffee beans are ground into powder by the grinding of the upper blade 711 and the lower blade 712. The ground powder is discharged from the gap between the upper blade 711 and the lower blade 712 into the powder outlet space 730, and then the powder is collected from the opening of the open-type annular protrusion 420.

[0043] Compared to existing coffee grinder designs, this application provides a cooling groove 511 on the side of the upper mounting plate 510 near the upper blade 711, and a liquid inlet 512 and a liquid outlet 513 on the side of the upper mounting plate 510. The upper blade 711 covers the cooling groove 511. The design utilizes the liquid inlet pipe 810, the liquid inlet 512, the cooling groove 511, the liquid outlet 513, the liquid outlet pipe 820, and the coolant storage tank 830. This secondary connection allows the coolant in the coolant storage tank 830 to enter the cooling groove 511 through the inlet pipe 810 and the inlet port 512, and then return to the coolant storage tank 830 through the outlet port 513 and the outlet pipe 820. This removes heat from the upper blade 711, thereby cooling the upper blade 711 and the lower blade 712. This prevents the upper blade 711 and the lower blade 712 from continuously generating heat during the grinding process, which would lead to accelerated oxidation of the coffee powder and reduce its flavor.

[0044] Furthermore, by cooling the upper cutter head 711 and the lower cutter head 712, the wear between them can be reduced, thus extending their service life.

[0045] See Figure 4 The lower blade mounting structure 600 can be rotated manually or electrically. For example, this application takes the lower blade mounting structure 600 as an example of electric rotation. Specifically, the water-cooled coffee grinder 10 also includes a drive motor 900. The output end of the drive motor 900 is connected to the lower shaft body 620 and is used to drive the lower blade mounting structure 600 to rotate.

[0046] The lower shaft 620 is driven to rotate by the drive motor 900, thereby driving the entire lower cutter head mounting structure 600 to rotate, realizing the rotation of the lower cutter head 712 relative to the upper cutter head 711, and grinding the coffee beans that enter between the lower cutter head 712 and the upper cutter head 711.

[0047] See Figures 4-6 To address the issue of different diameters for different materials, the distance between the upper cutter head 711 and the lower cutter head 712 described in this application is adjustable. Specifically:

[0048] The water-cooled coffee grinder 10 also includes an upper housing 300, which is connected to the lower housing 400 and encloses the upper blade mounting structure 500. The upper housing 300 is provided with an upper housing through hole 310, and the upper shaft body 520 is located inside the upper housing through hole 310.

[0049] The water-cooled coffee grinder 10 also includes a gap adjustment structure 200. The outer wall of the gap adjustment structure 200 is threadedly connected to the inner wall of the through hole 310 of the upper housing. The gap adjustment structure 200 abuts against the end of the upper shaft body 520 away from the upper mounting plate 510. The hollow interior of the gap adjustment structure 200 is connected to the feeding channel 750.

[0050] In simple terms, by adding a gap adjustment structure 200, and then threading the gap adjustment structure 200 to the inner wall of the through hole 310 of the upper housing, the gap adjustment structure 200 can move up and down relative to the upper housing 300 of the mill by rotating forward or backward.

[0051] For example, when the gap adjustment structure 200 moves downward, it can abut against the upper shaft body 520 and move downward. At this time, the upper tool disc mounting structure 500 moves downward, which reduces the gap between the upper tool disc 711 and the lower tool disc 712.

[0052] Furthermore, to avoid friction between the gap adjustment structure 200 and the upper shaft body 520, this application also provides a first bearing 721. Specifically, the water-cooled coffee grinder 10 also includes a first bearing 721 and a second bearing 722. The first bearing 721 is located between the gap adjustment structure 200 and the upper shaft body 520, and both ends of the first bearing 721 abut against the gap adjustment structure 200 and the upper shaft body 520, respectively.

[0053] The second bearing 722 is sleeved on the lower shaft part 620, and the two sides of the second bearing 722 abut against the outer wall of the lower shaft part 620 and the inner wall of the lower housing through hole 410, respectively.

[0054] The first bearing 721 allows relative sliding between the gap adjustment structure 200 and the upper cutter head mounting structure 500, thereby avoiding friction between the gap adjustment structure 200 and the upper shaft body 520, preventing damage to the gap adjustment structure 200 or the upper cutter head mounting structure 500, and improving the service life of the water-cooled coffee grinder 10.

[0055] Furthermore, the second bearing 722 can prevent friction between the lower shaft part 620 and the lower housing 400 of the mill while the drive motor 900 drives the lower shaft part 620 to rotate, thereby preventing damage to the lower shaft part 620 and the lower housing 400 of the mill while the lower blade mounting structure 600 rotates, and improving the service life of the water-cooled coffee grinder 10.

[0056] Furthermore, to further prevent friction between the lower mounting plate 610 and the lower housing 400 of the grinder, this application also provides a sealing ring 723 below the lower mounting plate 610. That is, the water-cooled coffee grinder 10 also includes a sealing ring 723, which is located between the lower mounting plate 610 and the lower housing 400 of the grinder, and both sides of the sealing ring 723 abut against the lower mounting plate 610 and the lower housing 400 of the grinder, respectively.

[0057] When the lower blade mounting structure 600 rotates, the bottom of the lower mounting plate 610 will not rub against the lower housing 400 of the grinder, thereby preventing damage to the lower mounting plate 610 and the lower housing 400 of the grinder and improving the service life of the water-cooled coffee grinder 10.

[0058] See also Figures 1-4 To facilitate the addition of coffee beans, this application also includes a feeding funnel 100, meaning the water-cooled coffee grinder 10 further includes a feeding funnel 100, the outer wall of which is connected to the inner wall of the gap adjustment structure 200. This allows coffee beans to be added more easily from the feeding funnel 100 into the feeding channel 750.

[0059] See also Figures 5-6 Furthermore, to facilitate the rapid entry of coffee beans into the grinding space 740 formed between the upper cutter head 711 and the lower cutter head 712, this application also includes a feeding shaft body 621 and a feeding vane 622, specifically:

[0060] The lower cutter head mounting structure 600 further includes a feeding shaft body 621 and a feeding vane 622. The feeding shaft body 621 is connected to the side of the lower mounting plate 610 opposite to the lower shaft body 620. The feeding vane 622 is spirally wrapped around the feeding shaft body 621, and both the feeding shaft body 621 and the feeding vane 622 are located within the feeding channel 750.

[0061] In this way, when the coffee beans enter the feed channel 750, as the lower cutter head mounting structure 600 rotates, the coffee beans will be continuously pressed down by the feeding vane 622 in the feed channel 750 into the grinding space 740 formed between the upper cutter head 711 and the lower cutter head 712, thereby completing a more efficient grinding operation.

[0062] Figure 7 This is an exploded view of an upper cutter head mounting structure and a lower mill housing according to an embodiment of this application. Figure 8 This is a schematic diagram of a positioning groove according to one embodiment of this application, combined with... Figures 7-8As shown, the water-cooled coffee grinder 10 also includes a positioning post 440 and a return spring 450. The positioning post 440 is disposed on the side of the lower housing 400 of the grinder near the upper blade mounting structure 500. The return spring 450 is sleeved on the positioning post 440. The upper mounting plate portion 510 is provided with a positioning groove 521 corresponding to the position of the positioning post 440. Both the positioning post 440 and the return spring 450 are partially located in the positioning groove 521. The two sides of the return spring 450 abut against the bottom of the positioning groove 521 and the lower housing 400 of the grinder, respectively.

[0063] In simple terms, by setting a positioning post 440 and a return spring 450 on the lower housing 400 of the mill, the return spring 450 applies an upward force to the upper mounting plate 510. When the gap adjustment structure 200 rotates and moves upward, the return spring 450 releases its elastic force, causing the upper cutter head mounting structure 500 to move upward, thereby increasing the distance between the upper cutter head 711 and the lower cutter head 712.

[0064] See also Figures 5-8 Since the powder coming out from between the upper blade 711 and the lower blade 712 will directly enter the powder outlet space 730, in order to remove the powder from the powder outlet space 730, this application also provides a paddle 611 in the powder outlet space 730. That is, the water-cooled coffee grinder 10 also includes at least one paddle 611. The paddle 611 is connected to the lower mounting plate 610 and is located in the powder outlet space 730. The paddle 611 follows the rotation of the lower mounting plate 610 and is used to scrape the powder in the powder outlet space 730 to the opening of the open-type annular protrusion 420.

[0065] When the lower mounting plate 610 rotates, it will drive the paddle 611 to move within the powder outlet space 730, thereby scraping the powder in the powder outlet space 730 to the opening of the open-type annular protrusion 420 for collection.

[0066] Furthermore, to prevent powder in the powder outlet space 730 from entering the area between the lower mill housing 400 and the upper mounting plate portion 510, the lower mill housing 400 of this application is provided with an annular limiting groove 430, and the annular limiting groove 430 is located on the open annular protrusion 420; the upper mounting plate portion 510 is provided with an annular limiting protrusion 514 corresponding to the position of the annular limiting groove 430, and the outer wall of the annular limiting protrusion 514 abuts against the inner wall of the annular limiting groove 430.

[0067] By setting the annular limiting groove 430 and the annular limiting protrusion 514, the lower housing 400 and the upper mounting plate 510 of the grinder are connected more tightly, thereby preventing powder in the powder outlet space 730 from entering the position between the lower housing 400 and the upper mounting plate 510 of the grinder, improving the powder output ratio of the water-cooled coffee grinder 10 and reducing the difficulty of cleaning.

[0068] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0069] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A water-cooled coffee grinder, characterized in that, The water-cooled coffee grinder includes a lower housing, an upper blade mounting structure, a lower blade mounting structure, an upper blade, and a lower blade. The lower housing has a lower housing through hole. The lower blade mounting structure includes a lower mounting plate and a lower shaft. The lower shaft is connected to the lower mounting plate near the lower housing. The lower shaft is located inside the lower housing through hole. The lower mounting plate is connected to the lower housing. The lower housing of the mill is provided with an open-type annular protrusion. The lower cutter disc is connected to the side of the lower mounting plate away from the lower shaft body. An annular powder outlet space is formed between the inner wall of the open-type annular protrusion and the outer wall of the lower cutter disc. The upper blade mounting structure includes an upper mounting plate and an upper shaft body. The upper shaft body is connected to the end of the upper mounting plate away from the lower blade. The upper blade mounting structure abuts against the open-shaped annular protrusion. The upper blade is connected to the side of the upper mounting plate near the lower blade, and a grinding space is formed between the upper blade and the lower blade. The hollow interior of the upper shaft body forms a feeding channel, which is connected to the grinding space. A cooling groove is provided on the side of the upper mounting plate near the upper blade disc. An inlet and an outlet are provided on the side of the upper mounting plate. The upper blade disc covers the cooling groove. The water-cooled coffee grinder also includes an inlet pipe, an outlet pipe, and a coolant storage tank. The inlet pipe, the inlet, the cooling groove, the outlet, the outlet pipe, and the coolant storage tank are connected in sequence.

2. The water-cooled coffee grinder according to claim 1, characterized in that, The water-cooled coffee grinder also includes an upper grinding shell, which is connected to the lower grinding shell and encloses the upper blade mounting structure. The upper grinding shell has an upper shell through hole, and the upper shaft body is located inside the upper shell through hole. The water-cooled coffee grinder also includes a gap adjustment structure. The outer wall of the gap adjustment structure is threadedly connected to the inner wall of the through hole of the upper housing. The gap adjustment structure abuts against the end of the upper shaft body that is away from the upper mounting plate. The hollow interior of the gap adjustment structure is connected to the feeding channel.

3. The water-cooled coffee grinder according to claim 2, characterized in that, The water-cooled coffee grinder also includes a positioning post and a return spring. The positioning post is located on the side of the lower housing of the grinder near the upper blade mounting structure. The return spring is sleeved on the positioning post. The upper mounting plate has a positioning groove corresponding to the position of the positioning post. Both the positioning post and the return spring are partially located in the positioning groove. The two sides of the return spring abut against the bottom of the positioning groove and the lower housing of the grinder, respectively.

4. The water-cooled coffee grinder according to claim 2, characterized in that, The lower cutter head mounting structure also includes a feeding shaft and a feeding vane. The feeding shaft is connected to the side of the lower mounting plate that is away from the lower shaft. The feeding vane is spirally wrapped around the feeding shaft, and both the feeding shaft and the feeding vane are located in the feeding channel.

5. The water-cooled coffee grinder according to claim 1, characterized in that, The water-cooled coffee grinder also includes at least one blade, which is connected to the lower mounting plate and located within the powder dispensing space. The blade rotates with the lower mounting plate to scrape the powder in the powder dispensing space onto the opening of the annular protrusion.

6. The water-cooled coffee grinder according to claim 2, characterized in that, The water-cooled coffee grinder also includes a first bearing and a second bearing. The first bearing is located between the gap adjustment structure and the upper shaft body, and both ends of the first bearing abut against the gap adjustment structure and the upper shaft body, respectively. The second bearing is sleeved on the lower shaft body, and the two sides of the second bearing abut against the outer wall of the lower shaft body and the inner wall of the through hole of the lower housing, respectively.

7. The water-cooled coffee grinder according to claim 1, characterized in that, The water-cooled coffee grinder also includes a sealing ring, which is located between the lower mounting plate and the lower housing of the grinder, and both sides of the sealing ring abut against the lower mounting plate and the lower housing of the grinder, respectively.

8. The water-cooled coffee grinder according to claim 1, characterized in that, The lower housing of the mill is provided with an annular limiting groove, and the annular limiting groove is located on the open annular protrusion; the upper mounting plate is provided with an annular limiting protrusion at the position corresponding to the annular limiting groove, and the outer wall of the annular limiting protrusion abuts against the inner wall of the annular limiting groove.

9. The water-cooled coffee grinder according to claim 2, characterized in that, The water-cooled coffee grinder also includes a feeding funnel, the outer wall of which is connected to the inner wall of the gap adjustment structure.

10. The water-cooled coffee grinder according to claim 1, characterized in that, The water-cooled coffee grinder also includes a drive motor, the output end of which is connected to the lower shaft body and is used to drive the lower blade mounting structure to rotate.

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