Pressure relief mechanism of coffee machine

Abstract

The utility model relates to the technical field of coffee machines, in particular to a pressure relief mechanism of a coffee machine, which comprises a complete machine shell, a water tank portion is movably arranged on one side of the complete machine shell, and a complete machine support is fixedly mounted in the complete machine shell. A water pump part, a boiler part, a steam valve part, a pressure valve assembly, a brewing head part and a funnel part which are sequentially communicated through an external pipeline are fixedly installed on the outer side end face of the whole machine support, and the waste liquid output end of the pressure valve assembly is communicated with a discharge pipe used for discharging redundant waste liquid. The defects that in the prior art, residual liquid drips, and the water content of coffee powder is large are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a pressure relief mechanism of a coffee machine. Background Art

[0002] As a daily appliance in Europe and America, espresso machines are widely used and have a high market share in household coffee machines. Their advantages are good market positioning, cost control, and simple structure. However, this type of product has a common problem in the industry, that is, after brewing stops, residual liquid keeps dripping down from the funnel mouth, and after removing the funnel handle, the coffee powder in the powder net is very wet and not in cake shape, and sticks to the powder net, making it inconvenient to pour out the grounds;

[0003] In order to solve the above problems, some existing products will install a water pump inside the equipment to reversely extract the residual liquid, but this practice not only increases production costs, but also increases equipment failure rate and power consumption;

[0004] To this end, a residual liquid extraction device with a mechanical structure will be proposed in this case to prevent the residual liquid from dripping continuously from the funnel mouth and reduce the water content of the coffee powder for better cleaning and use. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art such as residual liquid dripping, high water content of coffee powder, etc., and proposes a pressure relief mechanism for a coffee machine.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pressure relief mechanism for a coffee machine is designed, comprising a whole machine shell, a water tank portion being movably placed on one side of the whole machine shell, a whole machine bracket being fixedly installed inside the whole machine shell, a water pump portion, a boiler portion, a steam valve portion, a pressure valve assembly, a brewing head portion, and a funnel portion being fixedly installed on an outer end surface of the whole machine bracket, which are sequentially connected through an external pipeline, and a waste liquid output end of the pressure valve assembly is connected to a discharge pipe for discharging excess waste liquid.

[0008] Preferably, at least two groups of brewing water inlets are provided inside the brewing head, one end of the two groups of brewing water inlets are respectively connected to the brewing liquid output end of the boiler part or the pressure valve assembly and the waste liquid input end of the pressure valve assembly, and the other ends of the two groups of brewing water inlets are connected to the funnel part, and a coffee groove for storing coffee powder is provided on the inner side of the funnel part.

[0009] Preferably, a plug is slidably installed inside a group of the brewing water outlets for conveying brewing liquid, a first elastic member is elastically abutted between the plug and the inner end surface of the brewing water outlet, and a raised portion is integrally formed inside the brewing water outlet for cooperating with the plug to form a sealing structure.

[0010] Preferably, the pressure valve assembly includes a first shell, a first chamber is defined inside the first shell, a first water delivery port and a first connecting port that are interconnected are defined at one end of the first shell, the first water delivery port and the first connecting port are connected to the first chamber via a through groove, a second connecting port and a first discharge port that are respectively connected to the first chamber are defined at the other end of the first shell, a first sealing member that cooperates with the through groove, the second connecting port and the first discharge port is slidably installed inside the first chamber, and a second elastic member is elastically abutted between the first sealing member and the inner wall of the first chamber.

[0011] Preferably, the first water inlet is connected to the output end of the boiler part, the first connecting port is connected to the brewing liquid input end of the brewing head, the second connecting port is connected to the waste liquid discharge end of the brewing head, and the first discharge port is connected to the discharge pipe.

[0012] Preferably, the first shell is a left-right split structure, and the dividing point of the first shell is an end of the first chamber close to the through groove.

[0013] Preferably, the pressure valve assembly includes a second shell, a second chamber is defined inside the second shell, a second water delivery port communicating with the second chamber is defined at one end of the second shell, a third connecting port and a second discharge port communicating with the second chamber are defined at the other end of the second shell, a second sealing member cooperating with the second water delivery port, the third connecting port and the second discharge port is slidably installed inside the second chamber, and a third elastic member is elastically abutted between the second sealing member and the inner wall of the second chamber.

[0014] Preferably, the second discharge port is communicated with the discharge pipe, and the third connection port is communicated with the waste liquid discharge end of the brewing head.

[0015] Preferably, the second shell is a left-right split structure, and the dividing point of the second shell is an end of the first chamber close to the third connecting port and the second discharge port.

[0016] Preferably, a detachable waste water tank is provided inside the housing of the whole machine for collecting waste liquid flowing out of the discharge pipe, and the waste liquid output end of the pressure valve assembly faces downward.

[0017] The utility model provides a coffee machine pressure relief mechanism, which has the following beneficial effects:

[0018] Through the pressure valve assembly, the waste liquid can be extracted by utilizing the short-term residual pressure difference in the brewing head and the coffee tank, thereby preventing the waste liquid remaining in the coffee tank from continuously dripping outward. Compared with the existing reverse extraction method using electric structures such as liquid pumps, the production cost can be better saved and the failure rate can be reduced.

[0019] Through the provided brewing head, the plug structure inside it can better prevent the residual waste liquid from dripping, and cooperate with the pressure valve assembly to further improve the waste liquid extraction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The exploded structure diagram of the main body is shown in FIG.

[0021] Figure 2 It is a schematic diagram of the exploded structure of the internal components;

[0022] Figure 3 A schematic diagram of a side cross-sectional structure of an example 1 of an implementation method of a pressure valve assembly;

[0023] Figure 4 It is a schematic diagram of the explosion decomposition structure of the first embodiment of the pressure valve assembly;

[0024] Figure 5 A schematic side cross-sectional view of a second implementation example of a pressure valve assembly;

[0025] Figure 6 It is a schematic diagram of the explosion decomposition structure of the second implementation example of the pressure valve assembly;

[0026] Figure 7 This is a schematic diagram of the working state structure of the first implementation example of the pressure valve assembly;

[0027] Figure 8 This is a schematic diagram of the working state structure of the second implementation example of the pressure valve assembly;

[0028] Fig. 9 It is a schematic diagram of the internal cross-sectional structure of the brewing head.

[0029] In the figure:

[0030] 1. Machine housing; 101. Water tank; 102. Machine bracket; 2. Water pump; 3. Boiler; 4. Steam valve; 5. Pressure valve assembly; 501. Discharge pipe; 6. Brewing head; 601. Brewing water outlet; 602. Coffee tank; 603. Plug; 604. First elastic member; 7. Funnel;

[0031] 8. First shell; 801. First chamber; 802. First water delivery port; 803. Through groove; 804. First connection port; 805. Second connection port; 806. First discharge port; 807. First sealing member; 808. Second elastic member;

[0032] 9. Second shell; 901. Second chamber; 902. Second water inlet; 903. Third connecting port; 904. Second outlet; 905. Second sealing member; 906. Third elastic member. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. For the sake of ease of understanding and uniformity of description, the liquid that has not flowed through the coffee powder will be referred to as "brew liquid" and the liquid that has flowed through the coffee powder will be referred to as "waste liquid".

[0034] Reference Figure 1 , 2 , here is an example of how the subject is implemented:

[0035] A coffee machine pressure relief mechanism comprises a whole machine housing 1, a water tank part 101 is movably placed on one side of the whole machine housing 1, a whole machine bracket 102 is fixedly installed inside the whole machine housing 1 by means of bolts or the like, a water pump part 2, a boiler part 3, a steam valve part 4, a pressure valve assembly 5, a brewing head 6, and a funnel part 7 are fixedly installed on the outer end surface of the whole machine bracket 102, and the water pump part 2, a boiler part 3, a steam valve part 4, a pressure valve assembly 5, a brewing head 6, and a funnel part 7 are sequentially connected through an external pipeline, and a waste liquid output end of the pressure valve assembly 5 is connected with a discharge pipe 501 for discharging excess waste liquid;

[0036] Based on the above content, refer to Figure 2 , the extraction end of the water pump part 2 should be connected to the water tank part 101, which is used to extract the liquid in the water tank part 101 and transport it backward to various components; the boiler part 3 is used to heat the extracted liquid to make it reach the brewing temperature; the heated liquid enters the pressure valve assembly 5, the specific structure of the pressure valve assembly 5 is described in detail below, and its main function is to extract the residual liquid inside the funnel part 7 to prevent the residual liquid in the funnel part 7 from dripping continuously after the brewing is completed; the brewing liquid output end of the pressure valve assembly 5 is connected to the brewing head 6, and in order to improve safety, the brewing head 6 is also connected to the steam valve part 4 to prevent the steam from increasing the pressure too much and causing damage to the equipment; the whole machine bracket 102 should also be installed with a control circuit board, which is electrically connected to the components to be controlled to play a control role;

[0037] For further reference, Figure 1 The output end of the water tank part 101 can be at the bottom, which is a seat-type water tank structure commonly found in equipment such as wall breaking machines.

[0038] Reference Fig. 9 Here is an example of an implementation of the brewing head 6:

[0039] At least two groups of brewing water inlets 601 are provided inside the brewing head 6, one end of the two groups of brewing water inlets 601 are respectively connected to the brewing liquid output end of the boiler part 3 or the pressure valve assembly 5 and the waste liquid input end of the pressure valve assembly 5, and the other end of the two groups of brewing water inlets 601 are both connected to the funnel part 7, and the inner side of the funnel part 7 is provided with a coffee groove 602 for storing coffee powder;

[0040] Based on the above content, the brewing head 6 is used to combine with the funnel part 7 to form a complete coffee brewing structure, and its main body connection method can be similar to that of the existing coffee machine; the two groups of brewing water ports 601 in the brewing head are used to transport brewing liquid and waste liquid respectively;

[0041] Further, a plug 603 is slidably installed inside a group of brewing water ports 601 for conveying brewing liquid, and a first elastic member 604 is elastically abutted between the plug 603 and the inner end surface of the brewing water port 601. A convex portion should be integrally formed inside the brewing water port 601 to cooperate with the plug 603 to form a sealing structure, refer to Fig. 9 When brewing liquid enters, its water pressure will press the plug 603 downward to make the brewing water outlet 601 open. When the brewing liquid stops being delivered, the plug 603 will abut against the raised part inside the brewing water outlet 601 under the elastic drive of the first elastic member 604 to form a closed structure, which is mainly used to cooperate with the pressure valve assembly 5 and further prevent waste liquid from dripping from the funnel 7.

[0042] Reference Figure 3 , 4 , 7, here is an example of an implementation of the pressure valve assembly 5:

[0043] The pressure valve assembly 5 includes a first shell 8, a first chamber 801 is provided inside the first shell 8, a first water delivery port 802 and a first connection port 804 are provided at one end of the first shell 8, the first water delivery port 802 and the first connection port 804 are connected to the first chamber 801 through a through groove 803, a second connection port 805 and a first discharge port 806 are provided at the other end of the first shell 8, the first chamber 801 is respectively connected to the first connection port 805 and the first discharge port 806, a first sealing member 807 which cooperates with the through groove 803, the second connection port 805 and the first discharge port 806 is slidably installed inside the first chamber 801, and a second elastic member 808 is elastically abutted between the first sealing member 807 and the inner wall of the first chamber 801;

[0044] For a workflow based on the above, refer to Figure 3 , 7When brewing liquid is input from the first water delivery port 802, the brewing liquid enters the through groove 803 and the first connecting port 804 respectively. The brewing liquid entering the through groove 803 is pressed against the first sealing member 807 to push it forward, so that the first outlet 806 is closed by the sealing member, and the waste liquid cannot be discharged through the first outlet 806. The brewing liquid entering the first connecting port 804 enters the brewing head 6 and the funnel 7 to brew the coffee powder. At this time, the second connecting port 805 and the first outlet 806 are in a closed-circuit state, and the first water delivery port 802 and the first connecting port 804 are in a passage state; when the brewing liquid stops being delivered, the first sealing member 807 is no longer pressed against the brewing liquid, and is reset under the push of the second elastic member 808. At this time, the second connecting port 805 and the first outlet 806 form a passage, and the waste liquid flows through the second connecting port 805, the first chamber 801, and the first outlet 806 to be discharged;

[0045] The principle part based on the above content is based on the fact that there is a proper amount of coffee powder in the coffee tank 602. Due to the presence of coffee powder, the liquid cannot be discharged smoothly and quickly from the funnel part 7. There is a pressure difference between the liquid flowing into the coffee tank 602 and the normal pressure of the outside. When the brewing liquid stops being delivered, the coffee tank 602 still has a large pressure in a short period of time. At this time, the first sealing member 807 is opened, and the excess waste liquid in the coffee tank 602 will flow through the brewing water port 601, the second connecting port 805, the first chamber 801, and the first discharge port 806 under the action of pressure and be discharged. After many attempts, when the coffee powder in the coffee tank 602 is within the marked range, the waste liquid discharge is relatively excellent.

[0046] Furthermore, the first water inlet 802 is connected to the output end of the boiler part 3, the first connection port 804 is connected to the brewing liquid input end of the brewing head 6, the second connection port 805 is connected to the waste liquid discharge end of the brewing head 6, and the first discharge port 806 is connected to the discharge pipe 501;

[0047] Furthermore, a chamfer is provided at one end of the outer side of the first discharge port 806, so that the discharge pipe 501 can be movably plugged into the first discharge port 806;

[0048] Furthermore, the first housing 8 may be a left-right split structure, and the split point may be one end of the first chamber 801 close to the through slot 803, so that the first housing 8 can be split and disassembled, which is convenient for production and maintenance;

[0049] Furthermore, the bottom of the first sealing member 807 is a cylindrical structure that fits the inner wall of the first chamber 801, and the top of the first sealing member 807 is a rocket-shaped structure that is wide at the front and narrow at the back. The outer diameter of the top of the first sealing member 807 should be smaller than the inner diameter of the first chamber 801 and larger than the inner diameter of the first discharge port 806.

[0050] Furthermore, the outer movable sleeve of the cylindrical structure of the first sealing member 807 is provided with a sealing ring that is in sliding contact with the inner wall of the first chamber 801 .

[0051] Reference Figure 5 , 6 8, here is an example 2 of the implementation of the pressure valve assembly 5:

[0052] The pressure valve assembly 5 includes a second housing 9, a second chamber 901 is provided inside the second housing 9, a second water delivery port 902 communicating with the second chamber 901 is provided at one end of the second housing 9, a third connection port 903 and a second discharge port 904 communicating with the second chamber 901 are provided at the other end of the second housing 9, a second sealing member 905 cooperating with the second water delivery port 902, the third connection port 903 and the second discharge port 904 is slidably installed inside the second chamber 901, and a third elastic member 906 is elastically abutted between the second sealing member 905 and the inner wall of the second chamber 901;

[0053] In the working process based on the above content, when the brewing liquid is input from the second water inlet 902, the brewing liquid and the second sealing member 905 are pressed against each other to push it forward, so that a closed circuit structure is formed between the third connecting port 903 and the second discharge port 904, and the waste liquid cannot be discharged outward through the second discharge port 904; when the brewing liquid stops being input from the second water inlet 902, the second sealing member 905 is reset under the action of the third elastic member 906, and a passage is formed between the third connecting port 903 and the second discharge port 904, and the waste liquid can be discharged outward through the second discharge port 904;

[0054] The principle part based on the above content is the same as the principle in the first embodiment of the pressure valve assembly 5, but the difference of this embodiment is that the second shell 9 is no longer provided with an output port for brewing liquid, that is, the pressure valve assembly 5 is not directly connected to the brewing liquid input end of the brewing head 6. Therefore, when in use, the boiler part 3 can be provided with two output ports to communicate with the brewing head 6 and the pressure valve assembly 5 respectively, or a "Y"-shaped pipeline can be used to communicate with the brewing head 6 and the pressure valve assembly 5 through one output port; or an electric driving device, such as a cylinder device, or a micro air pump is connected to the second water delivery port 902 to drive the second sealing member 905 to move forward, so that it is no longer moved by the pressure of the brewing liquid;

[0055] Furthermore, the second discharge port 904 is connected to the discharge pipe 501, and the third connection port 903 is connected to the waste liquid discharge end of the brewing head 6;

[0056] Furthermore, a chamfer is provided at one end of the outer side of the second discharge port 904, so that the discharge pipe 501 can be movably plugged with the first discharge port 806;

[0057] Furthermore, the second housing 9 may be a left-right split structure, and the split point may be one end of the first chamber 801 close to the third connection port 903 and the second discharge port 904, so that the second housing 9 can be split and disassembled, which is convenient for production and maintenance;

[0058] Furthermore, one end of the second sealing member 905 close to the second water delivery port 902 is a cylindrical structure that fits the inner wall of the second chamber 901, and the other end of the second sealing member 905 is a truncated cone structure that can be plugged between the third connection port 903 and the second discharge port 904;

[0059] Furthermore, the outer movable sleeve of the cylindrical structure of the second sealing member 905 is provided with a sealing ring that is in sliding contact with the inner wall of the second chamber 901 .

[0060] Last addition:

[0061] In order to improve the effect of waste liquid discharge, the output end of the first discharge port 806 or the second discharge port 904 should be directed downward during installation so that the residual waste liquid in the component can be discharged by gravity;

[0062] The discharge pipe 501 can be connected to an external water pool, or a detachable waste water tank can be designed in the whole housing 1 to collect waste water.

[0063] Based on the above-mentioned embodiments, when assembling:

[0064] The water pump part 2, the boiler part 3, the steam valve part 4, the pressure valve assembly 5, the brewing head 6, and the funnel part 7 are installed on the outer end surface of the whole machine bracket 102 by means of bolts or the like, and the above components are connected in sequence by external pipelines. When the structure of the second implementation example of the pressure valve assembly 5 is adopted, the output end of the boiler part 3 can adopt a Y-shaped tube, or be connected to the second water delivery port 902 by adding an external air pump, an electric push rod and other structures to realize the pushing effect of the second sealing member 905; the first water delivery port 802 or the second water delivery port 902 is connected to the output end of the boiler part 3, the first connecting port 804 is connected to the brewing liquid input end of the brewing head 6, the second connecting port 805 or the third connecting port 903 is connected to the waste liquid output end of the brewing head 6, and the first discharge port 806 or the second discharge port 904 is connected to the discharge pipe 501.

[0065] Based on the above implementation examples, when used:

[0066] When the pressure valve assembly 5 is implemented as the first example, the brewing liquid is input from the first water delivery port 802, and the brewing liquid enters the through groove 803 and the first connecting port 804 respectively. The brewing liquid entering the through groove 803 is pressed against the first sealing member 807 to push it forward, so that the first discharge port 806 is closed by the sealing member, and the waste liquid cannot be discharged through the first discharge port 806. When the brewing liquid stops being delivered, the first sealing member 807 is no longer pressed against the brewing liquid, and is reset under the push of the second elastic member 808. At this time, the second connecting port 805 and the first discharge port 806 form a passage, and the waste liquid flows through the second connecting port 805, the first chamber 801, and the first discharge port 806 to be discharged;

[0067] When the pressure valve assembly 5 is in the second implementation example, the brewing liquid is input from the second water inlet 902, and the brewing liquid and the second sealing member 905 are pressed against each other to push it forward, so that a closed circuit structure is formed between the third connecting port 903 and the second discharge port 904. At this time, the waste liquid cannot be discharged outward through the second discharge port 904. When the brewing liquid stops being input from the second water inlet 902, the second sealing member 905 is reset under the action of the third elastic member 906. At this time, a passage is formed between the third connecting port 903 and the second discharge port 904, and the waste liquid can be discharged outward through the second discharge port 904.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coffee machine pressure relief mechanism, comprising a whole machine housing (1), a water tank portion (101) being movably placed on one side of the whole machine housing (1), and a whole machine bracket (102) being fixedly installed inside the whole machine housing (1), characterized in that: A water pump unit (2), a boiler unit (3), a steam valve unit (4), a pressure valve assembly (5), a brewing head (6), and a funnel unit (7) are fixedly mounted on the outer end surface of the whole machine support (102), which are sequentially connected via external pipelines. The waste liquid output end of the pressure valve assembly (5) is connected to a discharge pipe (501) for discharging excess waste liquid.

2. A coffee machine pressure relief mechanism according to claim 1, characterized in that: At least two groups of brewing water inlets (601) are provided inside the brewing head (6), one end of the two groups of brewing water inlets (601) are respectively connected to the brewing liquid output end of the boiler part (3) or the pressure valve assembly (5) and the waste liquid input end of the pressure valve assembly (5), and the other end of the two groups of brewing water inlets (601) are both connected to the funnel part (7), and a coffee groove (602) for storing coffee powder is provided inside the funnel part (7).

3. A coffee machine pressure relief mechanism according to claim 2, characterized in that: A plug (603) is slidably mounted inside a group of brewing water outlets (601) for conveying brewing liquid, a first elastic member (604) is elastically abutted between the plug (603) and the inner end surface of the brewing water outlet (601), and a protrusion is integrally formed inside the brewing water outlet (601) for cooperating with the plug (603) to form a sealing structure.

4. The pressure relief mechanism of a coffee machine according to claim 1, characterized in that: The pressure valve assembly (5) comprises a first shell (8), a first chamber (801) is provided inside the first shell (8), a first water delivery port (802) and a first connecting port (804) which are connected to each other are provided at one end of the first shell (8), the first water delivery port (802) and the first connecting port (804) are connected to the first chamber (801) via a through groove (803), a second connecting port (805) and a first discharge port (806) which are respectively connected to the first chamber (801) are provided at the other end of the first shell (8), a first sealing member (807) which cooperates with the through groove (803), the second connecting port (805) and the first discharge port (806) is slidably installed inside the first chamber (801), and a second elastic member (808) is elastically abutted between the first sealing member (807) and the inner wall of the first chamber (801).

5. The pressure relief mechanism of a coffee machine according to claim 4, characterized in that: The first water inlet (802) is connected to the output end of the boiler part (3), the first connection port (804) is connected to the brewing liquid input end of the brewing head (6), the second connection port (805) is connected to the waste liquid discharge end of the brewing head (6), and the first discharge port (806) is connected to the discharge pipe (501).

6. The pressure relief mechanism of a coffee machine according to claim 4, characterized in that: The first shell (8) is a left-right split structure, and the split point of the first shell (8) is an end of the first chamber (801) close to the through groove (803).

7. The pressure relief mechanism of a coffee machine according to claim 1, characterized in that: The pressure valve assembly (5) comprises a second shell (9), a second chamber (901) is provided inside the second shell (9), a second water delivery port (902) communicating with the second chamber (901) is provided at one end of the second shell (9), a third connecting port (903) and a second discharge port (904) communicating through the second chamber (901) are provided at the other end of the second shell (9), a second sealing member (905) cooperating with the second water delivery port (902), the third connecting port (903) and the second discharge port (904) is slidably mounted inside the second chamber (901), and a third elastic member (906) is elastically abutted between the second sealing member (905) and the inner wall of the second chamber (901).

8. The pressure relief mechanism of a coffee machine according to claim 7, characterized in that: The second discharge port (904) is in communication with the discharge pipe (501), and the third connection port (903) is in communication with a waste liquid discharge end of the brewing head (6).

9. The pressure relief mechanism of a coffee machine according to claim 7, characterized in that: The second shell (9) is a left-right split structure, and the split point of the second shell (9) is an end of the first chamber (801) close to the third connecting port (903) and the second discharge port (904).

10. The pressure relief mechanism of a coffee machine according to claim 1, characterized in that: A detachable waste water tank is provided inside the whole machine housing (1) for collecting waste liquid flowing out of the discharge pipe (501), and the waste liquid output end of the pressure valve assembly (5) faces downward.

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