Breather valve for coffee machine and coffee machine

Abstract

The utility model discloses a breather valve for coffee machine and coffee machine, the breather valve for coffee machine includes: the valve body, it includes first part, second part and third part, first part, second part and third part pairwise communicate with each other through fluid, third part extends up and down, the inside of third part forms the first fluid channel of upper and lower end opening; the first valve element is arranged in the third part, and the first valve element comprises a rod-shaped first element part and a spherical-crown-shaped second element part; the first joint is fixedly arranged at the end part, far away from the other two parts, of the third part; the pressing piece is arranged in the third part and comprises a body, a first through hole and a second through hole are formed in the body, the first core part penetrates through the first through hole, the edge of the second core part abuts against the bottom face of the body, and on the projection of the bottom face of the body, the first through hole and the second through hole are located in the second core part; the second perforation is also in fluid communication with the first fluid channel.

Description

Technical Field

[0001] The utility model relates to a beverage brewing device, in particular to a breather valve for a coffee machine and a coffee machine applied with the breather valve. Background Art

[0002] At present, pressure coffee machines, such as those disclosed in Chinese patents with application numbers 202320597430.0 and 202222480606.2, generally include a main body, a hot water cup, a liquid receiving cup and an extraction device. The hot water cup and the liquid receiving cup respectively form a hot water cavity and an extraction cavity with the main body. A heating component is arranged in the hot water cavity, a power supply component and a water pump communicated with the hot water cavity are arranged in the main body, an extraction needle is arranged on the bottom surface of the main body, and a water injection hole communicated with the outlet end of the water pump is arranged on the extraction needle.

[0003] For such a coffee machine, when extracting coffee powder, high-pressure water is injected into the powder box of the extraction device to extract the coffee powder in the powder box. Since high pressure will be generated in the powder box (brewing cavity), if the machine accidentally runs out of water during operation, an air cavity will be formed in front of the water pump, generating back pressure. At this time, even if water is replenished to the water tank, the water pump cannot pump water normally.

[0004] Therefore, further improvement is needed. Content of the Utility Model

[0005] The first technical problem to be solved by the utility model is to provide a breather valve for a coffee machine, which can realize slow pressure release without affecting the operation of the whole machine, aiming at the deficiencies of the above-mentioned existing technology.

[0006] The second technical problem to be solved by the utility model is to provide a coffee machine applied with the above breather valve.

[0007] The technical solution adopted by the utility model to solve the above first technical problem is as follows: a breather valve for a coffee machine, characterized in that the breather valve comprises:

[0008] A valve body, which comprises a first part, a second part and a third part. One end of each of the first part, the second part and the third part is connected to each other, so that the first part, the second part and the third part are in fluid communication with each other pairwise. The first part is for fluid to enter, the second part is for fluid to flow out, the third part extends vertically, and a first fluid passage with open upper and lower ends is formed in the third part;

[0009] A first valve core, which is arranged in the third part. The first valve core is integrally umbrella-shaped and comprises a rod-shaped first core part and a spherical crown-shaped second core part;

[0010] A first joint, which is fixedly arranged at the end of the third part far away from the other two parts; and

[0011] A pressing piece is arranged inside the third part. The pressing piece includes a body, on which a first through hole and a second through hole are formed. The first core part passes through the first through hole, and the edge of the second core part abuts against the bottom surface of the body. In the projection on the bottom surface of the body, the first through hole and the second through hole are located inside the second core part. The second through hole is also in fluid communication with the first fluid passage. The first fluid passage, the second through hole and the first joint constitute a passage for discharging the gas entering from the first part outside the air permeable valve.

[0012] Through the cooperation of the pressing piece inside the third part of the valve body for air permeability and the first valve core, the gas can be slowly released only through the second through hole of the pressing piece, reducing the pressure release speed and not affecting the normal operation of the whole machine.

[0013] To achieve the fluid communication between the second through hole and the first fluid passage, the pressing piece further includes a groove formed on the bottom surface of the body. The groove is in fluid communication with the second through hole. At the position where the groove is provided, there is a gap between the edge of the second core part and the bottom surface of the body. In the projection on the bottom surface of the body, the groove at least partially extends outside the second core part, thus making the second through hole in fluid communication with the first fluid passage.

[0014] To prevent the first valve core from detaching from the pressing piece, a protrusion is formed on the peripheral wall of the first core part. The size of the protrusion is larger than that of the first through hole, and the protrusion abuts against the upper surface of the body.

[0015] Preferably, to improve the fitting degree between the pressing piece and the first valve core, the first valve core is a valve core structure made of silica gel.

[0016] Preferably, part of the first joint is located inside the third part and part protrudes from the third part. A sealing ring is arranged between the first joint and the inner wall surface of the third part.

[0017] To better make the third part and the sealing ring press-fit, the air permeable valve further includes a buckle. An annular clamping groove is formed on the peripheral wall of the third part, and the buckle is fastened to the clamping groove, so that the third part and the sealing ring are pressed and fitted.

[0018] Further, a second joint is arranged inside the second part. A second fluid passage with two open ends is formed inside the second joint. A second valve core and an elastic member are arranged inside the second fluid passage. The elastic member makes the second valve core keep the tendency of blocking the second fluid passage. The second valve core and the elastic member constitute a back pressure valve, which can prevent liquid from flowing back and can also achieve a certain constant pressure at the water outlet of the pipeline.

[0019] The technical solution adopted by the present utility model to solve the above-mentioned second technical problem is as follows: A coffee machine includes a water pump and a boiler, and is characterized in that: the air permeable valve as described above is applied, the first part is directly or indirectly connected to the water pump, and the second part is directly or indirectly connected to the boiler.

[0020] Compared with the prior art, the advantages of the present utility model are as follows: Through the cooperation of the pressing piece and the first valve core in the third part of the valve body for air permeation, it can enable the gas to be slowly released only through the second through hole of the pressing piece, reducing the pressure release speed and not affecting the normal operation of the whole machine. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the air permeable valve according to an embodiment of the present utility model;

[0022] Figure 2 It is an exploded structural schematic diagram of the air permeable valve according to an embodiment of the present utility model;

[0023] Figure 3 It is a sectional view of the air permeable valve according to an embodiment of the present utility model;

[0024] Figure 4 It is a schematic diagram of the pressing piece of the air permeable valve according to an embodiment of the present utility model;

[0025] Figure 5 It is a schematic diagram of the pressing piece and the first valve core of the air permeable valve according to an embodiment of the present utility model. Detailed Embodiment

[0026] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the disclosed embodiments of the present utility model can be arranged in different directions, these terms indicating directions should only be used as explanations and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] See Figures 1 to 5 Figures 1 to 5 , a breather valve for a coffee machine, which is used to connect between the water pump and the boiler of the coffee machine. The water pump is used to pump the water in the water tank of the coffee machine into the boiler, and the boiler heats the pumped water and supplies it to the extraction box of the coffee machine. The above structures are all prior arts of the coffee machine and will not be elaborated here.

[0029] The breather valve includes a valve body 1, a first valve core 2, a second valve core 3, a first joint 4, a second joint 5 and a pressing piece 6. Among them, the valve body 1 has a structure of one inlet and two outlets, which includes a first part 11, a second part 12 and a third part 13. All three parts are hollow structures with open ends at both ends, preferably in the shape of a pipe. One end of each of the first part 11, the second part 12 and the third part 13 is connected to each other, that is, the three ends are connected at the same position, so that the first part 11, the second part 12 and the third part 13 are all fluidly connected to each other. Preferably, the axes of the three parts are perpendicular to each other pairwise. In the normal installation and use state, the third part 13 extends vertically, while the first part 11 and the second part 12 both extend horizontally, preferably horizontally. The end of the first part 11 away from the other two parts is used to connect to the water pump as the water inlet of the water pump. The end of the second part 12 away from the other two parts serves as the water outlet.

[0030] As can be seen from the above, in the normal installation and use state, the third part 13 extends vertically, and a first fluid channel 132 with open ends at both the upper and lower ends is formed therein. The first valve core 2 is arranged in the third part 13. The first joint 4 is fixedly arranged at the end of the third part 13 away from the other two parts. Part of the first joint 4 is located inside the third part 13, while part protrudes from the third part 13. A sealing ring 9 can be arranged between the first joint 4 and the inner wall surface of the third part 13 to prevent liquid or gas from leaking here (leaking from the inside to the outside or from the outside to the inside). The breather valve also includes a buckle 7. The buckle 7 is in a U shape. An annular clamping groove 131 is formed on the peripheral wall of the third part 13. The clamping groove 131 can penetrate the peripheral wall of the third part 13. The buckle 7 is buckled onto the clamping groove 131, so as to apply a tightening force to the third part 13, making the third part 13 tightly cooperate with the sealing ring 9. The pressing piece 6 is pressed by the first joint 4 inside the third part 13. A gas channel 41 with open ends at both ends is formed inside the first joint 4, so that the gas channel 41 is fluidly connected to the outside of the breather valve.

[0031] The tablet 6 includes a body 64 with a substantially circular cross-section (i.e., a generally flattened cylinder as a whole). A first perforation 61 and a second perforation 62 are formed in the body 64. The first perforation 61 and the second perforation 62 penetrate the body 64 in the thickness direction (shown as the up-down direction in the figure, i.e., the axial direction of the cylinder). The first perforation 61 may be located at the center of the cylinder, while the second perforation 62 is eccentrically arranged. The aperture of the first perforation 61 is larger than that of the second perforation 62. The first valve core 2 is generally umbrella-shaped and made of a flexible material, such as preferably silicone. It includes a rod-shaped first core part 21 and a spherical crown-shaped second core part 22. The end of the first core part 21 is connected to the second core part 22, preferably connected to the center of the second core part 22. The first core part 21 and the second core part 22 may be an integrally formed structure. The shape and size of the first core part 21 respectively match those of the first perforation 61, and it passes through the first perforation 61 from bottom to top. The edge of the second core part 22 abuts against the bottom surface of the body 64. In the projection on the bottom surface of the body 64, the first perforation 61 is within the range of the second core part 22. A raised part 23 may be formed on the peripheral wall of the first core part 21. The size of the raised part 23 is larger than that of the first perforation 61. After the first core part 21 passes through the first perforation 61, the raised part 23 abuts against the upper surface of the body 64 and seals the perforation 61, and at the same time prevents the first valve core 2 from detaching from the body 64. The tablet 6 further includes a groove 63 formed on the bottom surface of the body 64. The groove 63 is in fluid communication with the second perforation 62. In the projection on the bottom surface of the body 64, the groove 63 at least partially extends outside the second core part 22, so that the second perforation 62 can be in fluid communication with the first fluid passage 132 outside the space blocked by the second valve core 2. This is because there is a gap between the second core part 22 and the bottom surface of the body 64 at the position where the groove 63 is provided. In this embodiment, the groove 63 extends from the first perforation 61 to the edge of the body 64.

[0032] Thus, due to the arrangement of the first valve core 2, due to the pressure in the valve body 1, the edge of the second core part 22 will tightly adhere to the bottom surface of the tablet 6. The gas entering the third part 13 can only slowly enter the gas passage 41 of the first joint 4 through the first fluid passage 131, the groove 63, and the second perforation 62, and then be discharged to the outside of the breather valve, thereby achieving pressure relief. Thus, the speed of pressure release is reduced, and the normal operation of the whole machine will not be affected. And it is more difficult for liquid (usually water) to pass upward through the same path.

[0033] The second joint 5 is arranged inside the second part 12 and is used for connecting with the boiler, so that the second part 12 is indirectly connected with the boiler. A second fluid passage 51 with both ends open is formed inside the second joint 5, and the second fluid passage 51 is in fluid communication with both the first fluid passage 132 and the inside of the first part 11. The second valve core 3 is arranged inside the second fluid passage 51, and an elastic member 8, such as a spring, is also arranged inside the second fluid passage 51. The elastic member 8 acts on the second valve core 3, so that the second valve core 3 has a tendency to block the second fluid passage 51 and blocks the ends of the second fluid passage 51 close to the first part 11 and the third part 13. When the water pump works, when the fluid pressure is greater than the elastic force of the elastic member 8, the second valve core 3 can be pushed open, so that the fluid (mainly water) can pass through. The second valve core 3 is made of a flexible material. Preferably, the second valve core 3 is also made of silica gel. One end of the elastic member 8 can be in contact with the inner side of the end of the second joint 5 far away from the second valve core 3, and the other end of the elastic member 8 is in contact with the second valve core 3, so as to realize the acting force of the elastic member 8 on the second valve core 3. The second valve core 3 and the elastic member 8 form a back pressure valve, which can prevent the liquid from flowing back and can also realize a certain constant pressure at the water outlet of the pipeline (the water outlet end of the second joint 5).

[0034] As used in the present utility model, "fluid communication" refers to the spatial position relationship between two components or parts (hereinafter uniformly referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of both) can flow along the flow path from the first part and / or be transported to the second part. It can be that the first part and the second part are directly connected, or it can be that the first part and the second part are indirectly connected through at least one third party. The third party can be a fluid passage such as a pipeline, a channel, a conduit, a flow guiding member, a hole, a groove, etc., or a chamber allowing the fluid to flow through or a combination of the above.

Claims

1. An air permeable valve for a coffee machine, characterized in that: The breathing valve includes: A valve body (1), which includes a first part (11), a second part (12), and a third part (13). One end of each of the first part (11), the second part (12), and the third part (13) is connected to each other, so that the first part (11), the second part (12), and the third part (13) are in fluid communication with each other pairwise. The first part (11) is for fluid to enter, the second part (12) is for fluid to flow out, the third part (13) extends vertically, and a first fluid passage (132) with open upper and lower ends is formed in the third part (13); A first valve core (2), which is arranged in the third part (13). The first valve core (2) is integrally umbrella-shaped and includes a rod-shaped first core part (21) and a spherical crown-shaped second core part (22); A first connector (4), which is fixedly arranged at the end of the third part (13) far from the other two parts; and A pressing piece (6), which is arranged in the third part (13). The pressing piece (6) includes a body (64). A first through hole (61) and a second through hole (62) are formed in the body (64). The first core part (21) passes through the first through hole (61), and the edge of the second core part (22) abuts against the bottom surface of the body (64). In the projection on the bottom surface of the body (64), the first through hole (61) and the second through hole (62) are located within the second core part (22). The second through hole (62) is also in fluid communication with the first fluid passage (132). The first fluid passage (132), the second through hole (62), and the first connector (4) constitute a passage for the gas entering from the first part (11) to be discharged outside the breathing valve.

2. The air-permeable valve for a coffee machine according to claim 1, wherein: The pressing piece (6) further includes a groove (63) formed on the bottom surface of the body (64). The groove (63) is in fluid communication with the second through hole (62). At the position where the groove (63) is provided, there is a gap between the edge of the second core part (22) and the bottom surface of the body (64). In the projection on the bottom surface of the body (64), the groove (63) at least partially extends outside the second core part (22), thereby enabling the second through hole (62) to be in fluid communication with the first fluid passage (132).

3. The air-permeable valve for a coffee machine according to claim 1, characterized in that: A raised part (23) is formed on the peripheral wall of the first core part (21). The size of the raised part (23) is larger than that of the first through hole (61), and the raised part (23) abuts against the upper surface of the body (64).

4. The air-permeable valve for a coffee machine according to any one of claims 1 to 3, characterized in that: The first valve core (2) is a valve core structure made of silica gel.

5. The air-permeable valve for a coffee machine according to any one of claims 1 to 3, characterized in that: Part of the first connector (4) is located within the third part (13) while part protrudes from the third part (13). A sealing ring (9) is provided between the first connector (4) and the inner wall surface of the third part (13).

6. The air permeable valve for a coffee machine according to claim 5, characterized in that: The breathing valve further includes a buckle (7). An annular clamping groove (131) is formed on the peripheral wall of the third part (13). The buckle (7) is snapped onto the clamping groove (131), so that the third part (13) is tightly fitted with the sealing ring (9).

7. The air-permeable valve for a coffee machine according to any one of claims 1 to 3, characterized in that: A second joint (5) is arranged in the second part (12). A second fluid passage (51) with openings at both ends is formed in the second joint (5). A second valve core (3) and an elastic member (8) are arranged in the second fluid passage (51). The elastic member (8) makes the second valve core (3) keep a tendency to block the second fluid passage (51).

8. A coffee machine, comprising a water pump and a boiler, characterized in that: When the air permeable valve as claimed in any one of claims 1 to 7 is applied, the first part (11) is directly or indirectly connected to a water pump, and the second part (12) is directly or indirectly connected to a boiler.

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