Pneumatic coffee pot

Abstract

The utility model relates to the field of coffee pots, in particular to a pneumatic coffee pot which comprises a gas cylinder. The coffee machine main body is provided with a water sump; the pressure reducing valve main body is provided with a pressure building channel and a pressure relief channel, the pressure building channel is connected with the gas cylinder, and the pressure relief channel is connected with the water sump; the sliding valve is arranged on the pressure reducing valve body in a sliding mode, the sliding valve is provided with a pressure building groove connected with the pressure building channel and the pressure relief channel, the sliding valve is provided with a pressure relief groove connected with the pressure relief channel and the outside, and the pressure building groove and the pressure relief groove are arranged at intervals in the sliding direction of the sliding valve. The pneumatic coffee pot is more complete in function, the number of accessories is reduced, operation is simpler, the size is smaller, the weight is lighter, and the appearance conforms to ergonomics better and is attractive.

Description

Technical Field

[0001] This utility model relates to the field of coffee makers, and more particularly to a pneumatic coffee maker. Background Technology

[0002] The structure of the coffee maker can be referenced in Chinese Utility Model Patent Application No. CN202320587747.6, entitled "Combination Coffee Maker with De-aeration Structure". Currently available coffee maker pressure reducing valves reduce the pressure in the carbon dioxide cylinder from 60 bar to approximately 9 bar. The valve releases gas via a knob or press, and the released gas enters the coffee maker through a quick-connect device, increasing the internal pressure. This pressure forces the hot water in the coffee maker through the coffee grounds to extract the coffee concentrate. After extraction, the pressure is released through a depressurization device. Existing coffee maker pressure reducing valves are relatively large, not integrated with the depressurization valve, and the knob-based pressure release method is cumbersome, while the press-based method requires considerable force. They also have numerous components, are relatively large, inconvenient to operate, and do not conform to ergonomics. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a highly integrated and easy-to-operate pneumatic coffee maker.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a pneumatic coffee maker, comprising:

[0005] Gas cylinder;

[0006] The main body of the coffee machine includes a water tank;

[0007] The main body of the pressure reducing valve is equipped with a pressure building channel and a pressure relief channel. The pressure building channel is connected to the gas cylinder, and the pressure relief channel is connected to the water tank.

[0008] The slide valve is slidably mounted on the body of the pressure reducing valve. The slide valve has a pressure building groove that connects the pressure building channel and the pressure relief channel, and a pressure relief groove that connects the pressure relief channel and the outside. The pressure building groove and the pressure relief groove are spaced apart along the sliding direction of the slide valve.

[0009] Furthermore, the pressure-building channel includes a first chamber and an outlet. The outlet is located on the side wall of the pressure-reducing valve body. The first chamber is provided with a pin, a piston, and a first elastic element. The pin is provided with a first channel that connects to the gas cylinder body. The piston is supported on the pin by the first elastic element. The piston is provided with a sealing groove for sealing the first channel. The piston is provided with a second channel for connecting the first channel and the outlet. The outlet is connected to the pressure-relief channel through the pressure-building groove.

[0010] Furthermore, the pressure-building channel also includes a second chamber. The first chamber, the second chamber, and the air outlet are connected in sequence. The second chamber is provided with an air outlet needle and a second elastic element. One end of the air outlet needle is supported by the second elastic element on the inner wall of the second chamber. The other end of the air outlet needle slides out from the air outlet. The air outlet needle is provided with a first sealing element for blocking the air outlet. The pressure-building groove is provided with a wedge surface for compressing the air outlet needle.

[0011] Furthermore, the pressure relief channel includes a third chamber and an air inlet. The third chamber is connected to the water tank and the air inlet, respectively, and the air inlet is connected to the pressure build-up tank or the pressure relief tank.

[0012] Furthermore, a second sealing element is provided between the pressure building groove and the pressure relief groove of the slide valve, and the second sealing element abuts against the outer wall of the pressure reducing valve body.

[0013] Furthermore, the pressure reducing valve body is provided with pressure build-up position positioning groove, constant pressure position positioning groove and pressure relief position positioning groove at intervals along the sliding direction of the slide valve, and the slide valve is provided with locking glass beads that engage with the pressure build-up position positioning groove, constant pressure position positioning groove and pressure relief position positioning groove.

[0014] Furthermore, the side wall of the water tank is provided with an interface that connects the water tank and the pressure relief channel.

[0015] Furthermore, the side wall of the coffee machine body is equipped with a first pressure gauge connected to the water tank.

[0016] Furthermore, it also includes a handle, which is connected to the main body of the pressure reducing valve, and the gas cylinder is stored inside the handle.

[0017] Furthermore, a second pressure gauge connected to the gas cylinder is provided on the side wall of the handle.

[0018] The beneficial effects of this utility model are as follows: A pneumatic coffee maker integrates a gas cylinder and a pressure relief device into one unit, allowing switching between three working modes—pressure building, constant pressure, and pressure relief—via a sliding valve. In use, pushing the sliding valve connects the pressure building channel and the pressure relief channel of the pressure reducing valve body, allowing gas from the cylinder to enter the water tank of the coffee maker and build pressure, thus initiating coffee extraction. When the water tank pressure reaches a preset value, pushing the sliding valve changes the position of the pressure building channel, disconnecting the pressure building channel and the pressure relief channel, stopping gas from entering the water tank while maintaining water tank pressure. When pressure relief is needed, pushing the sliding valve connects the pressure relief channel and the pressure relief channel, releasing the water tank pressure. This utility model's pneumatic coffee maker offers more complete functions, reduces the number of accessories, simplifies operation, is smaller and lighter, and has a more ergonomic and aesthetically pleasing design. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure during pressure build-up in a pneumatic coffee maker;

[0020] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0021] Figure 3 This is a schematic diagram of a pneumatic coffee maker operating at constant pressure.

[0022] Figure 4 This is a schematic diagram of a pneumatic coffee maker during depressurization.

[0023] Label Explanation:

[0024] 1. Gas cylinder; 2. Coffee machine body; 21. Water tank; 211. Interface; 22. First pressure gauge; 23. Water distribution tray; 231. One-way valve; 232. Water distribution mesh; 24. Portion holder; 25. Lower cover; 251. Anti-slip silicone ring; 3. Pressure reducing valve body; 31. Pressure building channel; 311. First chamber; 312. Gas outlet; 313. Thruster; 3131. First channel; 314. Piston; 3141. Sealing groove; 3142. Second channel; 315 316. First elastic element; 317. Second chamber; 318. Air outlet needle; 319. First sealing element; 310. Second elastic element; 32. Pressure relief channel; 321. Third chamber; 322. Air inlet; 33. Pressure build-up position positioning groove; 34. Constant pressure position positioning groove; 35. Pressure relief position positioning groove; 4. Slide valve; 41. Pressure build-up groove; 411. Wedge surface; 42. Pressure relief groove; 43. Second sealing element; 44. Locking glass bead; 5. Handle; 51. Second pressure gauge. Detailed Implementation

[0025] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] Please refer to Figures 1 to 4 As shown, the present invention provides a pneumatic coffee maker, comprising:

[0027] Gas cylinder 1;

[0028] The coffee machine body 2 has a water tank 21;

[0029] The main body 3 of the pressure reducing valve is provided with a pressure building channel 31 and a pressure relief channel 32. The pressure building channel 31 is connected to the gas cylinder 1, and the pressure relief channel 32 is connected to the water tank 21.

[0030] The slide valve 4 is slidably mounted on the pressure reducing valve body 3. The slide valve 4 is provided with a pressure building groove 41 connecting the pressure building channel 31 and the pressure relief channel 32, and a pressure relief groove 42 connecting the pressure relief channel 32 and the outside. The pressure building groove 41 and the pressure relief groove 42 are spaced apart along the sliding direction of the slide valve 4.

[0031] As described above, the beneficial effects of this utility model are as follows: It integrates the gas cylinder 1 and the coffee maker's pressure relief device into one unit, allowing switching between three working modes—pressure building, constant pressure, and pressure relief—via the sliding valve 4. In use, pushing the sliding valve 4 connects the pressure building channel 31 and the pressure relief channel 32 of the pressure reducing valve body 3, allowing the gas cylinder 1 to supply air to the water tank 21 of the coffee maker body 2 to build pressure, thus increasing the pressure in the water tank 21 and initiating coffee extraction. When the pressure in the water tank 21 reaches a preset value, pushing the sliding valve 4 changes the position of the pressure building channel 31, disconnecting the pressure building channel 41 and the pressure relief channel 42, stopping the gas from entering the water tank 21 while maintaining the pressure in the water tank 21. When pressure relief is needed, pushing the sliding valve 4 connects the pressure relief channel 42 with the pressure relief channel 32, thus releasing the pressure in the water tank 21. This utility model's pneumatic coffee maker has more complete functions, fewer accessories, simpler operation, smaller size, lighter weight, and a more ergonomic and aesthetically pleasing appearance.

[0032] In an optional embodiment, the pressure building channel 31 includes a first chamber 311 and an outlet 312. The outlet 312 is disposed on the side wall of the pressure reducing valve body 3. The first chamber 311 is provided with a pin 313, a piston 314 and a first elastic element 315. The pin 313 is provided with a first channel 3131 that connects to the main body of the gas cylinder 1. The piston 314 is supported on the pin 313 by the first elastic element 315. The piston 314 is provided with a sealing groove 3141 for sealing the first channel 3131. The piston 314 is provided with a second channel 3142 for connecting the first channel 3131 and the outlet 312. The outlet 312 is connected to the pressure relief channel 32 through the pressure building groove 41.

[0033] As described above, the pressure build-up process is as follows: gas from gas cylinder 1 passes sequentially through the first channel 3131, the second channel 3142, and the vent 312, then enters the water tank 21 through the pressure build-up groove 41 and the pressure relief channel 32, increasing the pressure in the water tank 21 and initiating coffee extraction. During constant pressure and pressure relief, the vent 312 and the pressure build-up groove 41 are disconnected, and the first elastic element 315 is compressed, causing the sealing groove 3141 of the piston 314 to block the first channel 3131 of the ejector pin 313.

[0034] In an optional embodiment, the pressure building channel 31 further includes a second chamber 316. The first chamber 311, the second chamber 316, and the air outlet 312 are connected in sequence. The second chamber 316 is provided with an air outlet needle 317 and a second elastic element 318. One end of the air outlet needle 317 is supported by the second elastic element 318 on the inner wall of the second chamber 316. The other end of the air outlet needle 317 slides out from the air outlet 312. The air outlet needle 317 is provided with a first sealing element 3171 for blocking the air outlet 312. The pressure building groove 41 is provided with a wedge surface 411 for compressing the air outlet needle 317.

[0035] As described above, when sliding the slide valve 4, the wedge surface 411 gradually presses the air outlet needle 317 back into the second chamber 316, causing the first sealing element 3171 to fail to seal the air outlet 312, and the gas can then pressurize the water tank 21 through the air outlet 312. When the wedge surface 411 separates from the air outlet needle 317, the air outlet needle 317 extends out of the air outlet 312 under the action of the second elastic element 318, and the first sealing element 3171 seals the air outlet 312, preventing the gas from passing through, thus switching between constant pressure and pressure relief modes.

[0036] In an optional embodiment, the pressure relief channel 32 includes a third chamber 321 and an air inlet 322. The third chamber 321 is connected to the water tank 21 and the air inlet 322 respectively, and the air inlet 322 is connected to the pressure building groove 41 or the pressure relief groove 42.

[0037] As can be seen from the above description, the pressure relief process is as follows: push the slide valve 4 to connect the pressure relief groove 42 with the air inlet 322. At this time, the gas in the water tank 21 is depressurized after passing through the third chamber 321 and the air inlet 322.

[0038] In an optional embodiment, the slide valve 4 is provided with a second sealing element 43 between the pressure building groove 41 and the pressure relief groove 42, and the second sealing element 43 abuts against the outer wall of the pressure reducing valve body 3.

[0039] As can be seen from the above description, the second seal 43 is used to prevent gas leakage between the pressure build-up groove 41 and the pressure relief groove 42.

[0040] In an optional embodiment, the pressure reducing valve body 3 is provided with a pressure build-up position positioning groove 33, a constant pressure position positioning groove 34 and a pressure relief position positioning groove 35 at intervals along the sliding direction of the slide valve 4, and the slide valve 4 is provided with a locking glass bead 44 that engages with the pressure build-up position positioning groove 33, the constant pressure position positioning groove 34 and the pressure relief position positioning groove 35.

[0041] As can be seen from the above description, the movement of the slide valve 4 can be more accurately controlled by the locking glass ball 44 and the three position slots, thereby switching modes.

[0042] In an optional embodiment, the side wall of the water tank 21 is provided with an interface 211, which connects the water tank 21 and the pressure relief channel 32.

[0043] As can be seen from the above description, interface 211 is used to install the pressure reducing valve body 3, thereby connecting the water tank 21 and the pressure relief channel 32.

[0044] In an optional embodiment, the side wall of the coffee machine body 2 is provided with a first pressure gauge 22 connected to the water tank 21.

[0045] As can be seen from the above description, the first pressure gauge 22 is used to monitor the pressure inside the water tank 21.

[0046] In an optional embodiment, a handle 5 is also included, which is connected to the pressure reducing valve body 3, and the gas cylinder 1 is housed inside the handle 5.

[0047] As can be seen from the above description, the handle 5 serves to store the gas cylinder 1 and facilitates the user's handholding, so that the pressure building, constant pressure and pressure release of the water tank 21 can all be operated with one hand.

[0048] In an optional embodiment, the side wall of the handle 5 is provided with a second pressure gauge 51 connected to the gas cylinder 1.

[0049] As can be seen from the above description, the second pressure gauge 51 is used to display the pressure of gas cylinder 1, and can be replaced in time when the gas pressure is insufficient.

[0050] Please refer to Figures 1 to 4 As shown, Embodiment 1 of this utility model is: a pneumatic coffee maker, comprising:

[0051] Cylinder 1 is an 8g food-grade carbon dioxide cylinder filled with high-pressure carbon dioxide gas.

[0052] The coffee machine body 2 includes a food-grade silicone water tank 21, a food-grade silicone water distribution tray 23, a coffee bowl 24, and a lower cover 25, which isolates hot water from coffee grounds. The water distribution tray 23 is equipped with a one-way valve 231 and a water distribution mesh 232. The one-way valve 231 prevents the water in the water tank 21 from contacting the coffee grounds when there is no pressure, and the water distribution mesh 232 ensures that hot water is evenly distributed into the coffee grounds. The coffee machine body 2 uses a metal shell to enhance safety and is lighter and smaller than the commonly used 304 stainless steel, making it easier to carry. It also prevents the water temperature from dropping too quickly, which could lead to insufficient extraction temperature and thus insufficient coffee extraction rate. The 58mm coffee bowl 24 is used to hold coffee grounds. The lower cover 25 is screwed on to seal the coffee bowl 24 and the water tank 21. The lower cover 25 is equipped with a non-slip silicone ring 251 for easy unscrewing.

[0053] The main body 3 of the pressure reducing valve is provided with a pressure building channel 31 and a pressure relief channel 32. The pressure building channel 31 is connected to the gas cylinder 1, and the pressure relief channel 32 is connected to the water tank 21.

[0054] The slide valve 4, combined with the one-way valve 231 using a press-operated mechanism, is designed with three positions: front, middle, and rear. It is slidably mounted on the pressure-reducing valve body 3. The slide valve 4 has a pressure-building groove 41 connecting the pressure-building channel 31 and the pressure-reducing channel 32, and a pressure-reducing groove 42 connecting the pressure-reducing channel 32 and an external pressure-reducing groove 42. The pressure-building groove 41 and the pressure-reducing groove 42 are spaced apart along the sliding direction of the slide valve 4. The pressure-reducing groove 42 faces the side of the coffee machine body 2, thus preventing hands from getting wet during pressure release.

[0055] The pressure building channel 31 includes a first chamber 311 and an outlet 312. The outlet 312 is located on the side wall of the pressure reducing valve body 3. The first chamber 311 is provided with a pin 313, a piston 314 and a first elastic element 315. The pin 313 is used to puncture the carbon dioxide cylinder 1. The pin 313 is provided with a first channel 3131 that connects to the main body of the cylinder 1. The piston 314 is supported on the pin 313 by the first elastic element 315. The piston 314 is provided with a sealing groove 3141 for sealing the first channel 3131. The piston 314 is provided with a second channel 3142 for connecting the first channel 3131 and the outlet 312. The outlet 312 is connected to the pressure relief channel 32 through the pressure building groove 41. The pressure-building channel 31 also includes a second chamber 316. The first chamber 311, the second chamber 316, and the vent 312 are connected in sequence. The second chamber 316 is provided with a vent needle 317 and a second elastic element 318. One end of the vent needle 317 is supported by the second elastic element 318 on the inner wall of the second chamber 316, and the other end of the vent needle 317 slides out from the vent 312. The vent needle 317 is provided with a first sealing element 3171 for sealing the vent 312. The pressure-building groove 41 is provided with a wedge surface 411 for compressing the vent needle 317. In the figure, the vent needle 317 starts to release air when it slides down, and does not release air when it is in its original position. The pressure-relief channel 32 includes a third chamber 321 and an air inlet 322. The third chamber 321 is connected to the water tank 21 and the air inlet 322 respectively. The air inlet 322 is connected to the pressure-building groove 41 or the pressure-relief groove 42. A second sealing element 43 is provided between the pressure-building groove 41 and the pressure-relief groove 42 of the slide valve 4, and the second sealing element 43 abuts against the outer wall of the pressure-reducing valve body 3. The pressure-reducing valve body 3 is provided with pressure-building position positioning groove 33, constant pressure position positioning groove 34 and pressure-relief position positioning groove 35 at intervals along the sliding direction of the slide valve 4, and the slide valve 4 is provided with a locking glass bead 44 that engages with the pressure-building position positioning groove 33, constant pressure position positioning groove 34 and pressure-relief position positioning groove 35. The side wall of the water tank 21 is provided with an interface 211, which connects the water tank 21 and the pressure relief channel 32. The side wall of the coffee machine body 2 is provided with a first pressure gauge 22 connected to the water tank 21. The first pressure gauge 22 is a 0~16 bar pressure gauge. It also includes a handle 5, which is connected to the pressure-reducing valve body 3. The gas cylinder 1 is stored in the chamber inside the handle 5. The chamber can hold an 8-gram gas cylinder 1, and the overall sealed operation is safer. The side wall of the handle 5 is provided with a second pressure gauge 51 that is connected to the gas cylinder 1. The second pressure gauge 51 is a 0~2000psi pressure gauge, and an O-ring is provided between the second pressure gauge 51 and the handle 5.

[0056] Figure 1 When the pneumatic coffee maker builds pressure, the retaining glass bead 44 slides to the air intake position, and air enters the water tank 21.

[0057] Figure 3 When the pneumatic coffee maker is operating at constant pressure, the retaining glass bead 44 slides to the middle position, and the water tank 21 neither takes in air nor releases pressure.

[0058] Figure 4 When the pneumatic coffee maker releases pressure, the retaining glass bead 44 slides to the air intake position, depressurizing the water tank 21. At this time, the pressure in the first chamber 311 and the second chamber reaches 9 bar. The first spring is compressed, causing the piston 314 to block the air inlet, and the first seal 3171 seals the air outlet 312, preventing high-pressure carbon dioxide gas from entering the water tank 21. The pressure inside the water tank 21 gradually decreases to 0 bar.

[0059] In summary, this utility model of a pneumatic coffee maker integrates a gas cylinder and a pressure relief device into one unit. Three operating modes—pressure building, constant pressure, and pressure relief—can be switched via a sliding valve. During use, pushing the sliding valve connects the pressure building channel and the pressure relief channel of the pressure reducing valve body, allowing gas from the gas cylinder to enter the water tank of the coffee maker and build pressure, thus initiating coffee extraction. When the water tank pressure reaches a preset value, pushing the sliding valve changes the position of the pressure building channel, disconnecting the pressure building channel and the pressure relief channel, stopping gas from entering the water tank while maintaining water tank pressure. To release pressure, pushing the sliding valve connects the pressure relief channel and the pressure relief channel, releasing the water tank pressure. This utility model of a pneumatic coffee maker offers more comprehensive functions, reduces the number of accessories, simplifies operation, is smaller and lighter, and has a more ergonomic and aesthetically pleasing design.

[0060] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pneumatic coffee maker, characterized in that, include: Gas cylinder; The main body of the coffee machine includes a water tank; The main body of the pressure reducing valve is equipped with a pressure building channel and a pressure relief channel. The pressure building channel is connected to the gas cylinder, and the pressure relief channel is connected to the water tank. The slide valve is slidably mounted on the body of the pressure reducing valve. The slide valve has a pressure building groove that connects the pressure building channel and the pressure relief channel, and a pressure relief groove that connects the pressure relief channel and the outside. The pressure building groove and the pressure relief groove are spaced apart along the sliding direction of the slide valve.

2. The pneumatic coffee maker according to claim 1, characterized in that, The pressure building channel includes a first chamber and an outlet. The outlet is located on the side wall of the pressure reducing valve body. The first chamber is equipped with a pin, a piston, and a first elastic element. The pin has a first channel for connecting to the gas cylinder body. The piston is supported on the pin by the first elastic element. The piston has a sealing groove for sealing the first channel. The piston has a second channel for connecting the first channel and the outlet. The outlet is connected to the pressure relief channel through the pressure building groove.

3. The pneumatic coffee maker according to claim 2, characterized in that, The pressure building channel also includes a second chamber. The first chamber, the second chamber and the air outlet are connected in sequence. The second chamber is provided with an air outlet needle and a second elastic element. One end of the air outlet needle is supported by the second elastic element on the inner wall of the second chamber. The other end of the air outlet needle slides out from the air outlet. The air outlet needle is provided with a first sealing element for blocking the air outlet. The pressure building groove is provided with a wedge surface for compressing the air outlet needle.

4. The pneumatic coffee maker according to claim 1, characterized in that, The pressure relief channel includes a third chamber and an air inlet. The third chamber is connected to the water tank and the air inlet, respectively. The air inlet is connected to the pressure build-up tank or the pressure relief tank.

5. The pneumatic coffee maker according to claim 1, characterized in that, The slide valve is equipped with a second sealing element between the pressure building groove and the pressure relief groove, and the second sealing element abuts against the outer wall of the pressure reducing valve body.

6. The pneumatic coffee maker according to claim 1, characterized in that, The pressure reducing valve body is provided with pressure build-up position positioning groove, constant pressure position positioning groove and pressure relief position positioning groove at intervals along the sliding direction of the slide valve. The slide valve is provided with locking glass beads that engage with the pressure build-up position positioning groove, constant pressure position positioning groove and pressure relief position positioning groove.

7. The pneumatic coffee maker according to claim 1, characterized in that, The side wall of the water tank is equipped with an interface that connects the water tank to the pressure relief channel.

8. The pneumatic coffee maker according to claim 1, characterized in that, The side wall of the coffee machine body is equipped with a first pressure gauge that is connected to the water tank.

9. The pneumatic coffee maker according to claim 1, characterized in that, It also includes a handle, which is connected to the main body of the pressure reducing valve, and the gas cylinder is stored inside the handle.

10. The pneumatic coffee maker according to claim 9, characterized in that, The side wall of the handle is equipped with a second pressure gauge that connects to the gas cylinder.

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