Coffee machine integrating cold and hot extraction and milk foam stirring

Abstract

A coffee machine integrating cold and hot extraction and milk foam making comprises a base, a kettle body, an upper inner cup, a lower inner cup, an air pumping and blowing device, a stirrer and a heating device, the kettle body is arranged on the base, a liquid containing cavity is formed in the kettle body, the upper inner cup and the lower inner cup are arranged in the liquid containing cavity, the lower inner cup is connected to the lower portion of the upper inner cup, the inner cavity of the upper inner cup is communicated with the inner cavity of the lower inner cup, and the heating device is arranged on the kettle body. The air pumping and blowing device is communicated with the upper inner cup, and a stirrer is further arranged at the bottom of the liquid containing cavity. The upper inner cup and the lower inner cup are arranged in the kettle body and are communicated with the upper inner cup through the air pumping and blowing device, so that liquid in the liquid containing cavity is sucked into the upper inner cup and the lower inner cup, or the liquid in the upper inner cup and the lower inner cup is discharged to the liquid containing cavity, and cold extraction and hot extraction are realized through repeated operation. And the stirrer is arranged at the bottom in the kettle body and can be used for foaming milk foam. The functions of cold extraction, hot extraction and milk foaming are integrated in the same kettle body, the overall size of equipment can be reduced, and storage and use are convenient.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and more specifically to a coffee machine that integrates cold and hot brewing and milk frothing. Background Technology

[0002] Cold brew coffee, with its mild and mellow taste while retaining the aroma and flavor of coffee, is increasingly favored by consumers. To speed up the cold brew coffee preparation process, some cold brew coffee machines have emerged. For example, Chinese utility model patent CN 220898463U discloses a coffee machine that can quickly make both cold and hot brew coffee. This utility model uses a reciprocating circulation system to repeatedly pass water through the coffee powder container, thereby quickly extracting the coffee powder and significantly reducing the time required for cold brew. A cup of cold brew coffee can be obtained in a shorter time. Furthermore, this utility model can also make hot brew coffee, combining the functions of both rapid cold and hot brew.

[0003] However, many coffee lovers add milk foam to their brewed coffee, which is primarily created using a milk frother. The aforementioned patent cannot produce milk foam. While some coffee machines on the market have milk frothing functions, most have this function in a separate mechanism, distinct from other extraction components. This results in larger, less convenient devices. Therefore, we offer a coffee machine that integrates hot and cold brewing with milk frothing. Utility Model Content

[0004] This invention provides a coffee machine that integrates hot and cold brewing and milk frothing, aiming to solve the above-mentioned problems of existing coffee machines.

[0005] The present invention adopts the following technical solution:

[0006] A coffee machine integrating hot and cold brewing and milk frothing includes a base, a pot body, an upper inner cup, a lower inner cup, an air extraction device, a stirrer, and a heating device for heating the pot body. The pot body is placed on the base and has a liquid cavity inside. The upper inner cup and the lower inner cup are installed in the liquid cavity, and the lower inner cup is connected to the bottom of the upper inner cup. The inner cavities of the upper inner cup and the lower inner cup are connected. The air extraction device is connected to the upper inner cup, and the stirrer is also provided at the bottom of the liquid cavity.

[0007] In a preferred embodiment, a lid is detachably connected to the top of the pot body, the lid having two air holes, and the upper inner cup is detachably connected to the lower part of the lid.

[0008] In a preferred embodiment, the above-mentioned air extraction and blowing device includes an air extraction pipeline, an air blowing pipeline, an air pump, and a pipeline switching mechanism. The air pump's inlet and outlet are respectively connected to the air extraction pipeline and the air blowing pipeline through the pipeline switching mechanism.

[0009] In a preferred embodiment, each of the above-mentioned air holes is provided with a one-way valve, and an air nozzle is provided at one end of the air extraction pipe connected to the air hole and at one end of the air blowing pipe connected to the air hole, and each air nozzle is inserted into the one-way valve to open the one-way valve.

[0010] In a preferred embodiment, the above-mentioned air extraction device further includes a lifting rod and a lifting and moving limiting assembly. A housing is fixedly mounted on the base. The lifting and moving limiting assembly includes a movable connecting rod, a guide limiting seat, a ball bearing, and an elastic reset component. The guide limiting seat is fixedly installed inside the housing. The lifting rod is movably inserted into the guide limiting seat. A guide groove is formed on the side of the lifting rod. The movable connecting rod is disposed in the guide groove, and a spring is provided between the two. A ball bearing through hole is formed on each side of the guide groove. A ball bearing receiving groove is formed on each side of the lower part of the movable connecting rod. A ball bearing is installed between each ball bearing receiving groove and the ball bearing through hole. A ball bearing positioning groove is connected to the upper end of each ball bearing receiving groove. The ball bearing positioning groove and the ball bearing receiving groove are connected by an arc-shaped transition surface. A limiting groove is formed on each of the two opposite inner sidewalls of the guide limiting seat. The bottom of the lifting rod of the elastic reset component is connected to the housing.

[0011] In a preferred embodiment, the base is provided with a heating plate, and a stirring motor is fixedly installed below the center of the heating plate. The stirring motor cooperates with the stirrer through magnetic force to make the stirrer rotate.

[0012] In a preferred embodiment, both the bottom of the upper inner cup and the bottom of the lower inner cup are provided with filters.

[0013] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following advantages:

[0014] 1. This utility model includes a heating device for heating the kettle body. The kettle body contains an upper inner cup and a lower inner cup, connected to the upper inner cup via a suction device. This device draws liquid from the liquid chamber into the upper and lower inner cups, or discharges liquid from the upper and lower inner cups into the liquid chamber, repeating this process to achieve cold brewing and hot brewing. Furthermore, a stirrer is located at the bottom of the kettle body. Removing the upper and lower inner cups allows for milk frothing. Therefore, this utility model integrates cold brewing, hot brewing, and milk frothing functions within a single kettle body, reducing the overall size of the device and making it convenient to store and use. Additionally, the kettle body can also be used to boil water.

[0015] 2. This utility model is equipped with a one-way valve in each air hole, which can automatically close the air hole after the air nozzle rises after the extraction is completed, preventing the pot body from communicating with the outside and allowing the coffee liquid in the pot body to enter the lower inner cup and upper inner cup. This avoids the need to wait for the coffee liquid in the upper inner cup and lower inner cup to drain completely when taking them out, and improves the convenience of taking out the upper inner cup and lower inner cup after the extraction is completed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a top view of the present invention.

[0018] Figure 3 for Figure 2 A cross-sectional view along the AA direction.

[0019] Figure 4 for Figure 2 A cross-sectional view along the BB direction.

[0020] Figure 5 for Figure 4 A schematic diagram of the lifting boom in the upward-raised state. Detailed Implementation

[0021] The following reference Figure 1 The specific embodiments of this utility model are described below. To provide a comprehensive understanding of this utility model, many details are described below; however, those skilled in the art can implement this utility model without these details. Well-known components, methods, and processes will not be described in detail below.

[0022] A coffee machine that integrates hot and cold brewing and milk frothing, referencing Figures 1 to 3 The device includes a base 10, a kettle body 20, an upper inner cup 21, a lower inner cup 22, a stirrer 23, an air extraction device, and a heating device. The base 10 contains a heating plate 11, which serves as the heating device for the kettle body 20. A placement groove is formed on the top surface of the base corresponding to the heating plate 11, and the bottom of the kettle body 20 is placed on this placement groove.

[0023] Reference Figure 3 The vessel body 20 has a liquid cavity, and an opening at the top, onto which a lid 201 is fitted. An upper inner cup 21 and a lower inner cup 22 are installed within the liquid cavity. A stirrer 23 can be detachably installed at the bottom of the liquid cavity. The upper inner cup 21 is threaded to the bottom of the lid 201, and the lower inner cup 22 is threaded to the bottom of the upper inner cup 21. The lid 201 has two vent holes 202, both of which communicate with the inner cavity of the upper inner cup 21. Each vent hole 202 contains a one-way valve 203.

[0024] Reference Figure 3 Both the upper inner cup 21 and the lower inner cup 22 have filters at their bottoms, so that the inner cavities of the upper inner cup 21 and the lower inner cup 22 are connected, and the inner cavity of the lower inner cup 22 is connected to the liquid cavity of the kettle body. The air extraction device is connected to the upper inner cup 21, the lower inner cup 22 and the liquid cavity.

[0025] Reference Figure 3 The aforementioned air extraction and blowing device includes an air extraction pipe 31, an air blowing pipe 32, an air pump 33, and a pipe switching mechanism. The air pump 33's inlet and outlet are connected to the air extraction pipe 31 and air blowing pipe 32 respectively via the pipe switching mechanism. The pipe cutting mechanism includes components such as a motor and a turntable. For a detailed description of the specific structure, please refer to the air extraction and blowing device disclosed in Chinese Patent No. CN219645540U, which will not be elaborated upon here.

[0026] Reference Figure 3 and Figure 4 Each of the aforementioned air extraction pipe 31 connected to the air port 202 and the air blowing pipe 32 connected to the air port 202 is equipped with an air nozzle 301. Each air nozzle 301 is inserted into the one-way valve 203 to open the one-way valve 203; when it is pulled out, the one-way valve 203 closes. The one-way valve 203 can automatically close the air port 202 after the air nozzle is pulled out after extraction, preventing the pot body 20 from communicating with the outside and allowing the coffee liquid in the pot body 20 to enter the lower inner cup 22 and the upper inner cup 21, thereby avoiding the need to wait for the coffee liquid in the upper inner cup 21 and the lower inner cup 22 to drain completely when they are removed.

[0027] Reference Figure 4The aforementioned air extraction and blowing device also includes a lifting rod 34 and a lifting and moving limiting assembly. The aforementioned air extraction pipe 31 and air blowing pipe 32 are respectively fixed on the lifting rod 34. A housing 12 is fixed on the aforementioned base 10. The lifting and moving limiting assembly includes a movable connecting rod 35, a guide limiting seat 36, a ball bearing 37, and an elastic reset component. The guide limiting seat 36 is fixedly installed inside the housing 12. The lifting rod 34 is movably inserted into the guide limiting seat 36. A guide groove 340 is opened on the side of the lifting rod 34. The movable connecting rod 35 is located in the guide groove 340, and a first spring 39 is provided between the two. A ball bearing through hole 341 is opened on each side of the guide groove 340. A ball bearing receiving groove 351 is provided on each side of the lower part of the movable connecting rod 35. Each ball bearing... A ball 37 is installed between the receiving groove 351 and the ball through hole 341. Each ball receiving groove 351 is connected to a ball positioning groove 352 at its upper end. The ball positioning groove 352 and the ball receiving groove 351 are connected by an arc-shaped transition. A limiting groove 361 is provided on each of the two opposite inner side walls of the guide limiting seat 36. The elastic reset member is preferably a second spring 38. The second spring 38 is located between the bottom of the lifting rod 34 and the housing 12. A moving limiting rod 342 is provided at the position where the second spring 38 is installed at the bottom of the lifting rod 34 to limit the movement distance of the lifting rod 34.

[0028] Reference Figure 4 and Figure 5 When the lifting rod 34 is raised, part of the ball bearing 37 is in the ball receiving groove of the movable connecting rod 35, and the other part is in the ball through hole 341 of the lifting rod 34. Due to the limiting effect of the guide limit seat 36 on the side of the ball through hole 341, the ball bearing 37 will not fall out of the ball through hole 341. When the lifting rod 34 is subjected to external force, the lifting rod 34 compresses the second spring 38 and moves downward. The movable connecting rod 35 moves downward synchronously. When the lifting rod 34 is aligned with the ball through hole 341 and the limiting groove 361, the lifting rod 34 is unable to compress the second spring 38 and continue to move downward due to the action of the moving limit rod 342. However, the movable connecting rod 35 can compress the first spring 39 and continue to move downward relative to the lifting rod. The ball bearing 37 is squeezed outward under the action of the arc surface and the ball positioning groove 352, so that part of it is stuck into the limiting groove 361. The limiting effect of the ball bearing 37 fixes the lifting rod, the movable connecting rod, and the guide limit seat. When the lifting rod is pulled upward, the movable connecting rod moves upward relative to the lifting rod under the action of the first spring, and the balls are squeezed inward and move along the arc surface into the ball receiving groove.

[0029] Reference Figure 3A stirring motor 13 is also fixedly installed below the center of the heating plate 11. The stirring motor 13 rotates the stirrer 23 by magnetic force. The method of the stirring motor 13 rotating the stirrer 23 relative to the stirrer 23 by magnetic force is a common technique in the field and is not the focus of this utility model. It will not be described in detail here.

[0030] When used for cold brew, the air pump removes air from the upper and lower inner cups, forcing the liquid in the pot's liquid chamber into the upper and lower inner cups. Then, the tubing is switched, and the air pump blows air into the upper inner cup, releasing the solution in the upper and lower inner cups into the liquid chamber. This process of repeated flow of liquid in and out of the two cups extracts the coffee.

[0031] When used for hot extraction, the base heating plate is turned on to heat the pot body during the above cold extraction blowing and sucking process, and hot water is used for extraction to achieve hot extraction.

[0032] When used for frothing milk, remove the upper and lower inner cups, install the stirrer at the bottom of the pot, turn on the stirring motor to make the stirrer rotate, and at the same time the heating plate heats the milk to form milk foam.

[0033] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A coffee machine that integrates hot and cold brewing and milk frothing, characterized in that: The device includes a base, a kettle body, an upper inner cup, a lower inner cup, an air extraction device, a stirrer, and a heating device for heating the kettle body. The kettle body is placed on the base and has a liquid cavity inside. The upper inner cup and the lower inner cup are installed in the liquid cavity, and the lower inner cup is connected to the lower part of the upper inner cup. The inner cavities of the upper inner cup and the lower inner cup are connected. The air extraction device is connected to the upper inner cup, and the stirrer is also provided at the bottom of the liquid cavity.

2. The coffee machine that integrates hot and cold brewing and milk frothing as described in claim 1, characterized in that: A lid is detachably connected to the top of the kettle body, and the lid has two air holes. The upper inner cup is detachably connected to the lower part of the lid.

3. A coffee machine integrating cold and hot brewing and milk frothing as described in claim 2, characterized in that: The air extraction and blowing device includes an air extraction pipeline, an air blowing pipeline, an air pump, and a pipeline switching mechanism. The air pump's inlet and outlet are connected to the air extraction pipeline and the air blowing pipeline, respectively, through the pipeline switching mechanism.

4. A coffee machine integrating cold and hot brewing and milk frothing as described in claim 3, characterized in that: Each of the air holes is provided with a one-way valve. One end of the air extraction pipe connected to the air hole and the other end of the air blowing pipe connected to the air hole are respectively provided with an air nozzle. Each air nozzle is inserted into the one-way valve to open the one-way valve.

5. A coffee machine integrating cold and hot brewing and milk frothing as described in claim 3, characterized in that: The air extraction device also includes a lifting rod and a lifting and moving limiting assembly. A housing is fixedly mounted on the base. The lifting and moving limiting assembly includes a movable connecting rod, a guide limiting seat, a ball bearing, and an elastic reset component. The guide limiting seat is fixedly installed inside the housing. The lifting rod is movably inserted into the guide limiting seat. A guide groove is opened on the side of the lifting rod. The movable connecting rod is located in the guide groove, and a spring is provided between the two. A ball bearing through hole is opened on each side of the guide groove. A ball bearing receiving groove is provided on each side of the lower part of the movable connecting rod. A ball bearing is installed between each ball bearing receiving groove and the ball bearing through hole. A ball bearing positioning groove is connected to the upper end of each ball bearing receiving groove. The ball bearing positioning groove and the ball bearing receiving groove are connected by an arc-shaped surface. A limiting groove is provided on each of the two opposite inner sidewalls of the guide limiting seat. The bottom of the lifting rod of the elastic reset component is connected to the housing.

6. A coffee machine integrating cold and hot brewing and milk frothing as described in claim 1, characterized in that: The base is equipped with a heating plate, and a stirring motor is fixedly installed below the center of the heating plate. The stirring motor works with the stirrer through magnetic force to make the stirrer rotate.

7. A coffee machine integrating cold and hot brewing and milk frothing as described in claim 1, characterized in that: Both the bottom of the upper inner cup and the bottom of the lower inner cup are equipped with filters.

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