Pressure-adjustable and pressure-relief extraction assembly and coffee machine

Abstract

The utility model relates to an extraction assembly capable of adjusting and releasing pressure and a coffee maker, the extraction assembly comprises a connecting head, the connecting head is provided with a water inlet, a water passing port and a pressure releasing port which are communicated, a pressure adjusting valve is arranged between the water inlet and the water passing port, and the pressure releasing port is located in the side wall of the water passing port; the extraction head is fixedly connected with a water inlet channel, one end of the water inlet channel is in sliding connection with the water passing opening, and the other end of the water inlet channel is communicated with the brewing cavity. By arranging the pressure regulating valve and matching the water passing opening, the pressure relief opening and the water inlet channel, pressure regulation and pressure relief in the coffee brewing process are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment for brewing coffee, and in particular to an extraction component and a coffee machine capable of adjusting and releasing pressure. Background Art

[0002] A fully automatic coffee machine is an appliance that can at least realize the entire process of brewing coffee, including pressing powder, brewing, and removing residues. During the use of the coffee machine, coffee powder enters the brewing chamber and is pressed into a powder cake. Hot water passes through the powder cake for extraction. The extracted powder cake is pushed out by the powder pushing structure and scraped off by the powder scraper.

[0003] In existing coffee machines, the extraction head can generally only perform the function of extracting coffee by passing hot water. However, during the process of pressing coffee powder into powder cakes and extracting coffee, there will be excessive changes in air pressure or water pressure in the brewing chamber, which will have a great impact on both the pressing quality of the powder cake and the extraction quality of the coffee. Utility Model Content

[0004] The present application provides an extraction component capable of adjusting pressure and releasing pressure, wherein the extraction head can adjust brewing pressure and release pressure during the coffee extraction and powder cake pressing processes.

[0005] The present application provides an extraction component capable of adjusting and releasing pressure, which adopts the following technical solution:

[0006] An extraction component capable of adjusting and releasing pressure, comprising:

[0007] A connecting head, the connecting head having a water inlet, a water outlet and a pressure relief port connected to each other, a pressure regulating valve is arranged between the water inlet and the water outlet, and the pressure relief port is located on the side wall of the water outlet;

[0008] The extraction head is fixedly connected with a water inlet channel, one end of the water inlet channel is slidably connected to the water port, and the other end is connected to the brewing chamber.

[0009] In a preferred embodiment, it further comprises a fixing bracket, wherein the fixing bracket is fixedly arranged on the top of the coffee machine, and the connecting head is fixedly connected to the fixing bracket.

[0010] In a preferred embodiment, the connecting head also includes a sealing port, the pressure regulating valve is threadedly connected to the connecting head via the sealing port, the bottom of the pressure regulating valve is connected to the water port, one side of the pressure regulating valve is provided with an intermediate opening connected to the water inlet, a silicone sealing head is connected to the bottom of the pressure regulating valve, a pressure regulating spring is connected between the silicone sealing head and the water port, and the intermediate opening is connected to the water port.

[0011] In a preferred embodiment, an inverted "T"-shaped pressure regulating chamber is provided in the pressure regulating valve, the top of the pressure regulating chamber is connected to the middle opening, and the silicone sealing head is located at the bottom of the pressure regulating chamber and slides along the bottom of the pressure regulating chamber to seal or open the pressure regulating chamber.

[0012] In a preferred embodiment, a compression spring is connected between the fixing bracket and the extraction head.

[0013] In a preferred embodiment, the fixed bracket is fixedly provided with a signal switch, and the extraction head is provided with a switch trigger structure cooperating with the signal switch.

[0014] In a preferred embodiment, a channel limiting cavity is provided in the fixing bracket, a limiting plate is fixedly connected to the water inlet channel, the limiting plate is provided in the channel limiting cavity and is slidably connected to the channel limiting cavity.

[0015] In a preferred embodiment, an upper filter is fixedly connected to a side of the extraction head facing the brewing chamber.

[0016] In a preferred embodiment, it also includes a pressure relief joint, which is connected to the pressure relief port.

[0017] On the other hand, the present application also provides a coffee machine, in which the above-mentioned extraction component is arranged.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. During the movement of the brewing chamber toward the extraction component, the coffee powder in the brewing chamber can be pressed into a powder cake in cooperation with the extraction head, and the air is exhausted through the water inlet channel and the pressure relief port. Then, the force of the movement of the brewing chamber pushes the extraction head and the water inlet channel to continue to move toward the connection head, so that the water inlet channel connects to the water port, and triggers external hot water to enter the brewing chamber from the water inlet, the water port and the water inlet channel, thereby completing the coffee extraction. After the coffee extraction is completed, the brewing chamber moves away from the extraction component, and the extraction head moves away from the connection head, so that the water inlet channel connects to the pressure relief port again. At this time, the high-pressure water vapor in the brewing chamber and the water inlet channel can be depressurized through the pressure relief port, thereby completing the pressure relief in the overall water injection process. At the same time, when the water inlet pressure needs to be adjusted, the water inlet pressure can be adjusted by the pressure regulating valve between the water inlet and the water port. The extraction component can complete pressure relief and pressure regulation during the use of the coffee machine, which not only improves the convenience of using the coffee machine, but also improves the quality of coffee brewed by the coffee machine.

[0020] 2. The cooperation between the signal switch and the switch trigger structure enables the signal switch to output an electrical signal when the extraction head moves to a fixed position, so as to control the brewing chamber and the extraction head to stop moving. At the same time, it can also ensure that the pressure on the coffee powder cake is a fixed value each time coffee is brewed, thereby improving the quality of coffee brewing.

[0021] 3. The pressure relief joint can discharge high-pressure water vapor or air to the outside of the coffee machine through a hose or a fixed exhaust pipe, so as to facilitate pressure relief during the operation of the coffee machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the extraction component and brewing unit described in this application.

[0023] Figure 2 It is a schematic diagram of the structure of the extraction component described in Example 1 of the present application.

[0024] Figure 3 It is a schematic diagram of the connection head structure described in Example 1 of the present application.

[0025] Figure 4 It is a schematic diagram of the structure of the extraction component described in Example 2 of the present application.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. Brewing unit; 11. Brewing chamber; 2. Extraction head; 21. Extraction sealing ring; 22. Upper filter; 23. Water inlet channel; 231. Limiting plate; 232. Lower sealing ring; 233. Upper sealing ring; 24. Switch trigger structure; 26. Water-passing fixing groove; 3. Fixed bracket; 31. Signal switch; 32. Channel limiting chamber; 4. Compression spring; 5. Connection head; 51. Sealing port; 52. Water inlet; 53. Water outlet; 54. Pressure relief port; 55. Pressure regulating installation chamber; 6. Pressure relief joint; 7. Pressure regulating valve; 71. Middle opening; 74. Pressure regulating chamber; 72. Silicone sealing head; 73. Pressure regulating spring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 This application is described in further detail.

[0028] Reference Figure 1 The embodiment of the present application discloses an extraction component with adjustable pressure and pressure relief, which is used in a coffee machine and completes the steps of pressing and extracting coffee powder together with a brewing unit 1 in the coffee machine.

[0029] Embodiment 1:

[0030] Reference Figure 1The extraction assembly includes a fixed bracket 3, a connection head 5 and an extraction head 2. The extraction head 2 is open on one side of the fixed bracket 3 and wraps the side of the fixed bracket 3 facing the extraction head 2. The extraction head 2 is slidably connected with the fixed bracket 3, and the fixed bracket 3 is fixed on the top of the coffee machine. The brewing unit 1 is provided with a brewing chamber 11 facing the extraction assembly. The extraction head 2 is provided with an extraction sealing ring 21 on one side of the brewing chamber 11, and slides along the brewing chamber 11 through the extraction sealing ring 21. The end of the extraction head 2 facing the brewing chamber 11 is provided with an upper filter 22.

[0031] After adding coffee powder into the brewing chamber 11, the brewing unit 1 moves toward the extraction assembly, and the extraction head 2 cooperates with the brewing chamber 11 to press the coffee powder into a powder cake, and external hot water enters the brewing chamber 11 through the connection head 5 and the extraction head 2 to complete the extraction of coffee.

[0032] Reference Figure 2 A compression spring 4 is connected between the fixed bracket 3 and the extraction head 2. During the process of pressing the powder cake, the brewing unit 1 moves toward the extraction assembly, so that the extraction head 2 cooperates with the brewing chamber 11 through the elastic force of the compression spring 4 to press the coffee powder into a powder cake.

[0033] It should be noted that the present application does not make a sole limitation on the fixing arrangement of the compression spring 4. The compression spring 4 only needs to enable the extraction head 2 to produce elastic displacement under the action of the brewing unit 1. In a preferred example, a guide column (not shown in the figure) is fixedly provided inside the extraction head 2, and the fixed bracket 3 is configured to cooperate with the guide column (not shown in the figure), the top of the guide column passes through the clearance hole, and the compression spring 4 is sleeved on the outside of the guide column.

[0034] Furthermore, a signal switch 31 is fixedly connected to the top of the fixed bracket 3, and a switch trigger structure 24 that cooperates with the signal switch 31 is fixedly connected to the outer surface of the extraction head 2. During the process of pressing the powder cake, the brewing unit 1 moves toward the extraction component. When the switch trigger structure 24 triggers the signal switch 31, the brewing unit 1 stops moving, and external hot water enters the brewing chamber 11 through the connection head 5 and the extraction head 2 to complete the coffee extraction. The arrangement of the signal switch 31 and the switch trigger structure 24 enables the brewing unit 1 to stop at a fixed position relative to the extraction component, ensuring that the pressure applied to the powder cake is the same each time the powder cake is pressed.

[0035] It should be noted that in the example of the present application, the signal switch 31 is configured to send an electrical signal after being triggered so that the brewing unit 1 stops moving and starts to take in water to extract coffee, that is, any switch that can meet this function can be used as the signal switch 31. In the example of the present application, the signal switch 31 is preferably a micro switch.

[0036] Furthermore, the extraction head 2 is connected to the connection head 5 via a water inlet channel 23, and the water inlet channel 23 is in a straight tube shape. A channel limiting cavity 32 is provided in the fixing bracket 3, and a limiting plate 231 is fixedly connected to the outer side of the water inlet channel 23, and the limiting plate 231 is provided in the channel limiting cavity 32 and is slidably connected to the channel limiting cavity 32. In a preferred example, the limiting plate 231 is fixedly connected to the extraction head 2, thereby improving the fixed connection strength between the water inlet channel 23 and the extraction head 2.

[0037] Furthermore, a water-passing fixed groove 26 is provided on one side of the extraction head 2 facing the connection head 5, and a lower sealing ring 232 is provided at the bottom of the water inlet channel 23. After the bottom of the water inlet channel 23 is inserted into the water-passing fixed groove 26, the extraction head 2 is fixedly connected through the lower sealing ring 232. The water inlet channel 23 is connected to the upper filter plate 22 through the water-passing fixed groove 26.

[0038] Reference Figure 2 and Figure 3 The connecting head 5 is a four-way connector, specifically including a sealing port 51, a water inlet 52, a water port 53 and a pressure relief port 54. The top of the water inlet channel 23 is inserted into the water port 53 and slides along the water port 53. The pressure relief port 54 is arranged on one side of the water port 53, and the sealing port 51 is arranged on the top of the connecting head 5. After the external hot water enters the connecting head 5 through the water inlet 52, it flows into the water inlet channel 23 through the water port 53, and then flows into the brewing chamber 11 through the water inlet channel 23 and the upper filter plate 22.

[0039] When the extraction head 2 is not subjected to pressure from the brewing unit 1, the top of the water inlet channel 23 is inserted into the water port 53 and is located below the pressure relief port 54. When the powder cake is pressed, the switch trigger structure 24 triggers the signal switch 31. At this time, after the water inlet channel 23 rises with the extraction head 2, the top of the water inlet channel 23 is located above the pressure relief port 54 and blocks the pressure relief port 54. In a preferred example, an upper sealing ring 233 is provided at the top of the water inlet channel 23. The top of the water inlet channel 23 slides with the inner wall of the water port 53 through the upper sealing ring 233. When the signal switch 31 is triggered, the upper sealing ring 233 is located above the pressure relief port 54.

[0040] Furthermore, the pressure relief port 54 is fixedly connected to a pressure relief joint 6, which is used to connect a pressure relief hose (not shown in the figure). During the coffee brewing process, the high-pressure air / water vapor in the coffee machine enters the pressure relief hose through the pressure relief port 54 and the pressure relief joint 6, and is discharged to the outside of the coffee machine through the pressure relief hose.

[0041] The connecting head 5 is provided with a pressure regulating installation cavity 55, the top of which is the sealing port 51. The connecting head 5 is fixedly provided with a pressure regulating valve 7, which is inserted into the pressure regulating installation cavity 55 through the sealing port 51 and is fixedly connected with the sealing port 51 through threads.

[0042] The pressure regulating valve 7 is provided with a middle opening 71 and a pressure regulating chamber 74 which are interconnected. The middle opening 71 is provided on the side wall of the pressure regulating valve 7 and is connected to the water inlet 52. The pressure regulating chamber 74 is connected to the water outlet 53. A pressure regulating structure is provided in the pressure regulating chamber 74. When external hot water enters through the water inlet 52, it flows into the pressure regulating chamber 74 through the middle opening 71, and then flows into the water outlet 53 through the pressure regulating chamber 74. The pressure regulating structure in the pressure regulating chamber 74 can adjust the water pressure of the hot water passing through the pressure regulating chamber 74.

[0043] The pressure regulating chamber 74 is in an inverted "T" shape as a whole, the top of the pressure regulating chamber 74 is a thin chamber connected to the middle opening 71, and the bottom of the pressure regulating chamber 74 is a thick chamber connected to the water port 53. The pressure regulating structure includes a silicone sealing head 72 and a pressure regulating spring 73 located at the bottom of the pressure regulating chamber 74. The top of the silicone sealing head 72 is mushroom-shaped and located in the thick chamber of the pressure regulating chamber 74, and the bottom of the silicone sealing head 72 extends out of the pressure regulating chamber 74 and is connected to the bottom of the pressure regulating installation chamber 55 through the pressure regulating spring 73. In the initial state, the silicone sealing head 72 blocks the thin chamber part of the pressure regulating chamber 74 under the elastic action of the pressure regulating spring 73.

[0044] When external hot water enters the inner opening of the pressure regulating chamber 74 through the water inlet 52, the hot water in the pressure regulating chamber 74 needs to overcome the force applied to the silicone sealing head 72 by the pressure regulating spring 73 before entering the water passage 53. When the water pressure needs to be adjusted, it is only necessary to screw the pressure regulating valve 7 and adjust the position of the pressure regulating valve 7 in the pressure regulating installation chamber 55 to adjust the elastic force of the pressure regulating spring 73, thereby changing the spring elastic force that the water in the pressure regulating chamber 74 needs to overcome.

[0045] The working principle of the embodiment of the present application is as follows: during the movement of the brewing chamber 11 toward the extraction component, the coffee powder in the brewing chamber 11 can be pressed into a powder cake in cooperation with the extraction head 2, and the air is exhausted through the water inlet channel 23 and the pressure relief port 54, and then the force of the movement of the brewing chamber 11 pushes the extraction head 2 and the water inlet channel 23 to continue to move toward the connection head 5, so that the water inlet channel 23 connects to the water port 53, and triggers external hot water to enter the brewing chamber 11 from the water inlet 52, the water port 53 and the water inlet channel 23, thereby completing the coffee extraction. After the coffee extraction is completed, the brewing chamber 11 moves away from the extraction component, and the extraction head 2 moves away from the connection head 5, so that the water inlet channel 23 connects to the pressure relief port 54 again. At this time, the high-pressure water vapor in the brewing chamber 11 and the water inlet channel 23 can be depressurized through the pressure relief port 54, thereby completing the pressure relief in the whole process of water injection. At the same time, when it is necessary to adjust the water inlet pressure, the water inlet pressure can be adjusted by the pressure regulating valve 7 between the water inlet 52 and the water port 53. The extraction component can complete pressure relief and pressure regulation during the use of the coffee machine, which not only improves the convenience of using the coffee machine, but also improves the quality of coffee brewed by the coffee machine.

[0046] In another example of this embodiment, the present application further discloses a coffee machine, in which the above-mentioned extraction component is disposed, and the extraction component can also complete pressure relief and pressure regulation during the process of extracting coffee.

[0047] Embodiment 2:

[0048] Reference Figure 4 The difference between this embodiment and embodiment 1 is that the connection head 5 is fixedly connected to the top of the coffee machine, and the compression spring 4 is located in the water outlet 53.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An extraction component capable of adjusting and releasing pressure, characterized in that: include: A connecting head (5), the connecting head (5) having a water inlet (52), a water outlet (53) and a pressure relief port (54) which are connected to each other, a pressure regulating valve (7) being arranged between the water inlet (52) and the water outlet (53), and the pressure relief port (54) being located on a side wall of the water outlet (53); An extraction head (2), wherein the extraction head (2) is fixedly connected with a water inlet channel (23), one end of the water inlet channel (23) is slidably connected to the water outlet (53), and the other end is connected to the brewing chamber (11).

2. The pressure-adjustable and pressure-relieving extraction component according to claim 1, characterized in that: It also comprises a fixed bracket (3), wherein the fixed bracket (3) is fixedly arranged on the top of the coffee machine, and the connecting head (5) is fixedly connected to the fixed bracket (3).

3. The pressure-adjustable and pressure-relieving extraction component according to claim 2, characterized in that: The connecting head (5) further comprises a sealing port (51), the pressure regulating valve (7) is threadedly connected to the connecting head (5) via the sealing port (51), the bottom of the pressure regulating valve (7) is connected to the water port (53), one side of the pressure regulating valve (7) is provided with an intermediate opening (71) connected to the water inlet (52), the bottom of the pressure regulating valve (7) is connected to a silicone sealing head (72), a pressure regulating spring (73) is connected between the silicone sealing head (72) and the water port (53), and the intermediate opening (71) is in communication with the water port (53).

4. The pressure-adjustable and pressure-relieving extraction component according to claim 3, characterized in that: An inverted "T"-shaped pressure regulating chamber (74) is provided in the pressure regulating valve (7); the top of the pressure regulating chamber (74) is connected to the middle opening (71); the silicone sealing head (72) is located at the bottom of the pressure regulating chamber (74) and slides along the bottom of the pressure regulating chamber (74) to block or open the pressure regulating chamber (74).

5. The pressure-adjustable and pressure-relieving extraction component according to claim 2, characterized in that: A compression spring (4) is connected between the fixed bracket (3) and the extraction head (2).

6. The pressure-adjustable and pressure-relieving extraction component according to claim 5, characterized in that: The fixed bracket (3) is fixedly provided with a signal switch (31), and the extraction head (2) is provided with a switch trigger structure (24) cooperating with the signal switch (31).

7. The pressure-adjustable and pressure-relieving extraction component according to claim 2, characterized in that: A channel limiting cavity (32) is provided in the fixed bracket (3), and a limiting plate (231) is fixedly connected to the water inlet channel (23); the limiting plate (231) is arranged in the channel limiting cavity (32) and is slidably connected to the channel limiting cavity (32).

8. The pressure-adjustable and pressure-relieving extraction component according to claim 1, characterized in that: An upper filter sheet (22) is fixedly connected to a side of the extraction head (2) facing the brewing chamber (11).

9. The pressure-adjustable and pressure-relieving extraction component according to claim 2, characterized in that: It also includes a pressure relief joint (6), wherein the pressure relief joint (6) is connected to the pressure relief port (54).

10. A coffee machine, characterized in that: The coffee machine is equipped with an extraction component according to any one of claims 1 to 9.

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