Hand Press Coffee Machine

Abstract

The embodiment of the present invention discloses a hand-pressed coffee machine, which includes: a machine body, a container is arranged on the upper part of the machine body, a brewing chamber is formed on the lower part of the machine body, a through hole connecting the container and the brewing chamber is formed in the middle part of the machine body, a water-insertion needle is arranged in the through hole, and a one-way valve assembly is arranged between the container and the water-insertion needle or in the water-insertion needle; the bottom of the container has a connecting hole connected to the water-insertion needle and is provided with a heating element for heating liquid; a hand-pressed pump is arranged in the container, and the upper part of the hand-pressed pump extends out of the container; the lower part of the hand-pressed pump has a joint valve, which is arranged in the connecting hole of the container, and has a water inlet connected to the container and a water outlet connected to the water-insertion needle; a coffee box is arranged in the brewing chamber. The hand-pressed coffee machine of the embodiment of the present invention has a clever design, a simple principle, convenient operation, and stable function. In addition, due to the heating function, its portability is greatly improved; there is no need to carry a container for storing hot water or a machine for heating water.

Description

Technical Field

[0001] The invention belongs to the technical field of small household appliances, and in particular relates to a hand-pressed coffee machine. Background Art

[0002] The hand-pressed coffee machine currently on the market brews coffee by adding pre-heated water into the water tank container of the hand-pressed coffee machine; therefore, the hand-pressed coffee machine needs to be equipped with a container for storing hot water or a machine for heating water when brewing coffee, which reduces the portability of the hand-pressed coffee machine and has a portability problem.

[0003] For example, the Chinese patent with the announcement number CN 206565784 U discloses a hand-pressed capsule coffee machine, which includes a water tank, a capsule seat and a pressing rod. The pressing rod can move in the water chamber of the water tank. When making coffee, it is necessary to add pre-added hot water into the water chamber, and then press the pressing rod downward. The upper puncture needle at the bottom of the water tank punctures the upper surface of the capsule, and the hot water in the water chamber flows into the coffee capsule from the upper puncture needle. After the hot water is dissolved with the coffee in the coffee capsule, a cup of finished coffee is made. Since the hand-pressed capsule coffee machine does not have the function of heating water, it needs to be equipped with a container for storing hot water or a machine for heating water, which causes inconvenience in carrying and using. Summary of the invention

[0004] In view of the above problems existing in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a hand-pressed coffee machine with a heating function to improve portability.

[0005] In order to solve the above technical problems, the embodiments of the present invention adopt the following technical solutions:

[0006] A hand-pressed coffee machine, comprising:

[0007] The machine body has a container for holding liquid on its upper part, a brewing chamber formed on its lower part, a through hole connecting the container and the brewing chamber formed in its middle part, a water-insertion needle arranged in the through hole, and a one-way valve assembly arranged between the container and the water-insertion needle or in the water-insertion needle; the bottom of the container has a connecting hole connected to the water-insertion needle and is provided with a heating element for heating the liquid;

[0008] A hand pump is arranged in the container, and its upper part extends out of the container; the lower part of the hand pump has a joint valve, the joint valve is arranged in the connecting hole of the container, and the joint valve has a water inlet connected to the container and a water outlet connected to the water-inserting needle;

[0009] The coffee box is arranged in the brewing chamber.

[0010] The hand-pressed coffee machine of the embodiment of the present invention can be used as an independent water container when no coffee box is installed by providing a one-way valve assembly, and the one-way valve assembly can also prevent the coffee liquid from flowing back into the container and polluting the water quality during hand-pressed brewing. At the same time, since a heating element is provided at the bottom of the container, the coffee machine can heat water by itself and brew coffee by hand without the need for a separate container for storing hot water or a device for heating hot water, and the hand-pressed coffee machine can also be used as a separate appliance for heating hot water.

[0011] Preferably, the joint valve includes a valve body, a water inlet one-way valve core arranged in the valve body for opening or closing the water inlet, and a water outlet one-way valve core for opening or closing the water outlet; the water inlet one-way valve core is provided with an elastic sealing member for sealing the water inlet when the water inlet is closed. By adding an elastic sealing member, the water inlet one-way valve becomes a composite structure. When the hand pump is pressed downward, the water pressure generated can make the matched water inlet one-way valve core and the elastic sealing member effectively seal the water inlet without causing the problem of sealing failure.

[0012] Preferably, the water inlet one-way valve core comprises a valve core body and a protrusion protruding from the valve core body so as to extend into and block the water inlet, and the elastic sealing member is sleeved on the protrusion and abuts against the valve core body. Through simple structural improvement, good sealing is achieved while ensuring service life.

[0013] Preferably, a trigger is convexly provided at the lower end of the joint valve, and the trigger is used to push the one-way valve assembly to put it in a conducting state. By setting the trigger, the one-way valve assembly is opened in a mechanical top-opening manner, thereby ensuring the complete opening of the one-way valve assembly without incomplete opening.

[0014] Preferably, the container is a double-layer vacuum structure, so that the hand-pressed coffee machine has a heat preservation function and can be used as a hot water cup.

[0015] Preferably, the heating element is a coated heating disk to reduce the volume of the heating element and increase the heating speed.

[0016] Preferably, the container is provided with an upper cover for sealing the container, and the upper cover is provided with a pressure relief protection device to provide pressure relief protection for the container.

[0017] Preferably, an air inlet valve device is provided on the upper cover to connect the interior of the container with the external atmosphere, so that the atmosphere can enter the container during the hand pressing process, but the water in the container can be prevented from leaking to the outside of the machine.

[0018] Preferably, the hand pump comprises a pump body and a piston rod, wherein the piston rod is arranged in the piston cavity of the pump body, the upper end of the piston rod passes through the upper cover and is provided with an operating handle; the joint valve is arranged in the lower end of the pump body; a sealing device is arranged outside the lower end of the pump body to isolate the body into a container cavity located at the upper part and the brewing cavity located at the lower part. The hand pump has a simple structure and is easy to operate.

[0019] Preferably, a groove is provided in the middle of the inner side of the upper cover, and an internal thread is provided on the side wall of the groove; an external thread is provided on the upper end of the pump body, and the upper end of the pump body is threadedly connected to the groove. The pump body is stably combined with the upper cover through the threaded connection.

[0020] Compared with the prior art, the hand-pressed coffee machine of the embodiment of the present invention has the following beneficial effects:

[0021] 1. The hand-pressed coffee machine of the embodiment of the present invention has a heating function, which greatly improves its portability; there is no need to carry a container for storing hot water or a machine for heating water.

[0022] 2. The hand-pressed coffee machine of the embodiment of the present invention can be used as an independent water container or a separate water-boiling device when no coffee box is installed by providing a one-way valve assembly. The one-way valve assembly can also prevent coffee liquid from flowing back into the container and contaminating the water quality during hand-pressed brewing.

[0023] 3. The hand-pressed coffee machine of the embodiment of the present invention has an ingenious design, a simple principle, convenient operation and stable functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic diagram of the exploded structure of a hand-pressed coffee machine according to an embodiment of the present invention.

[0025] Figure 2 2 is a cross-sectional view of the overall structure of a hand-pressed coffee maker according to an embodiment of the present invention.

[0026] Figure 3 for Figure 2 Enlarged view of part A.

[0027] Figure 4 It is a cross-sectional view of a hand pressure pump and an upper cover of a hand pressure coffee machine according to an embodiment of the present invention, wherein the piston rod is in a pulled-up state.

[0028] Figure 5 It is a cross-sectional view of a hand pressure pump and an upper cover of a hand pressure coffee machine according to an embodiment of the present invention, wherein the piston rod is in a depressed state.

[0029] Figure 6 for Figure 5 Magnified view of part B.

[0030] Figure 7 Schematic diagram of the structure of a container of a hand-pressed coffee machine according to an embodiment of the present invention.

[0031] Figure 8 FIG. 1 is a schematic structural diagram of a hand-pressed coffee machine in a first working state according to an embodiment of the present invention.

[0032] Fig. 9 FIG. 4 is a schematic structural diagram of a hand-pressed coffee machine in a second working state according to an embodiment of the present invention.

[0033] Description of Reference Numerals

[0034] 1-body; 2-hand pump; 3-coffee box; 4-container; 5-brew chamber; 6-check valve assembly; 7-heating element; 8-connecting hole; 9-connector valve; 10-water inlet; 11-water outlet; 12-valve body; 13-check valve core of water inlet; 14-check valve core of water outlet; 15-protrusion; 16-trigger; 17-upper cover; 18-pressure relief protection device; 19-inlet valve device; 20-pump body; 21-piston pressure rod; 22-piston cavity; 23-operating handle; 24-groove; 25-water puncture needle; 26-elastic sealing member; 27-sealing device. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0036] like Figures 1 to 9 As shown, a hand pressure coffee machine disclosed in an embodiment of the present invention comprises: a machine body 1, a hand pressure pump 2 and a coffee box 3 (or coffee capsule), wherein a container 4 for holding liquid is arranged on the upper part of the machine body 1, a brewing chamber 5 is formed on the lower part thereof, a through hole connecting the container 4 and the brewing chamber 5 is formed in the middle part thereof, a water puncture needle 25 is arranged in the through hole, a one-way valve assembly 6 is arranged between the container 4 and the water puncture needle 25 or in the water puncture needle 25; a heating element 7 for heating liquid is arranged at the bottom of the container 4 and has a connecting hole 8 connected with the water puncture needle 25; the hand pressure pump 2 is arranged in the container 4, and the upper part thereof extends out of the container 4; a joint valve 9 is arranged at the lower part of the hand pressure pump 2, the joint valve 9 is arranged in the connecting hole 8 of the container 4, and the joint valve 9 has a water inlet 10 connected with the container 4 and a water outlet 11 connected with the water puncture needle 25; the coffee box 3 is arranged in the brewing chamber 5.

[0037] The hand-pressed coffee machine of the embodiment of the present invention can be used as an independent water container 4 when the coffee box 3 is not loaded by providing a one-way valve assembly 6. Moreover, the one-way valve assembly 6 can also prevent the coffee liquid from flowing back into the container 4 and polluting the water quality during hand-pressed brewing. It should be noted that the specific position of the one-way valve assembly 6 is not limited to being provided in the water-injection needle 25. For example, it can also be provided between the bottom of the container 4 and the upper part of the water-injection needle 25. At the same time, since the heating element 7 is provided at the bottom of the container 4, the coffee machine can heat water by itself and brew coffee by hand-pressing without the need for a separate container 4 for storing hot water or a device for heating hot water. Moreover, the hand-pressed coffee machine can also be used as a separate device for heating hot water.

[0038] As a preferred solution of the embodiment of the present invention, Figure 5 and Figure 6 As shown, the joint valve 9 of the hand pump 2 includes a valve body 12, a water inlet one-way valve core 13 and a water outlet one-way valve core 14 arranged in the valve body 12; the water inlet one-way valve core 13 is used to open or close the water inlet 10, and can only make the water inlet 10 one-way, that is, only the water in the container 4 can enter the piston cavity 22 of the hand pump 2 through the water inlet 10, but cannot make the water flow back from the piston cavity 22 into the container 4; the water outlet one-way valve core 14 is used to open or close the water outlet 11, and can only make the water outlet 11 one-way, that is, only the water in the piston cavity 22 can flow into the water-injection needle 25 and then into the coffee box 3, but cannot make the coffee liquid in the coffee box 3 flow back into the piston cavity 22. The water inlet one-way valve core 13 is provided with an elastic sealing member 26 for sealing the water inlet 10 when the water inlet 10 is closed. This embodiment adds an elastic seal 26 to make the water inlet check valve core 13 a composite structure (the water inlet check valve core 13 adopts a sealing structure of rigid material plus elastic material). When the hand pump 2 is pressed downward, the generated water pressure can effectively seal the water inlet 10 by the matched water inlet check valve core 13 and the elastic seal 26, so that the water in the piston cavity 22 of the manual pump can be completely pressed out through the water outlet 11. Unlike the one-way valve core structure made of only rigid materials in the prior art, such as using steel balls for sealing, there is no problem of not being able to ensure complete sealing of the water inlet 10, and there is no problem of using a one-way valve core structure made of all elastic materials, which is easily pushed out of the water inlet 10 under high pressure or cut by the edge of the water inlet 10 to damage the sealing, causing sealing failure.

[0039] Continue to combine Figure 6The water inlet one-way valve core 13 of this embodiment includes a valve core body and a protrusion 15 protruding from the valve core body to extend into and block the water inlet 10. The elastic sealing member 26 is sleeved on the protrusion 15 and abuts against the valve core body. An annular groove is provided on the protrusion 15 of this embodiment, and the elastic sealing member 26 is an annular ring and is embedded in the annular groove. This embodiment achieves good sealing while ensuring service life through simple structural improvements.

[0040] As a further preferred embodiment of the present invention, a trigger member 16 is protruding from the lower end of the connector valve 9. The trigger member 16 of this embodiment is arranged at the water outlet 11 and has a through hole that penetrates the water outlet 11. When the hand pump 2 is arranged in the container 4, the trigger member 16 presses down the one-way valve assembly 6 to completely open it, so that the one-way valve assembly 6 is in a fully open state, and the water in the piston cavity 22 enters the water injection needle 25 through the one-way valve assembly 6 and then enters the coffee box 3; when the hand pump 2 is taken out of the container 4, the one-way valve assembly 6 is reset and lifted up, and the through hole is sealed, so that the container 4 can hold water independently. The above structure adopts a mechanical structure to open the one-way valve assembly 6, and the problem of not being able to fully open the one-way valve assembly 6 will not occur (such as using the water pressure pressed by the hand pump 2 to open the one-way valve assembly 6, which is prone to the problem of the one-way valve assembly 6 not being able to fully open). The structure of the mechanical top-opening one-way valve assembly 6 adopted in this embodiment can ensure that the cross-sectional area of ​​the water flow is consistent after the one-way valve is opened, so that the brewing coffee extraction effect is better and the performance is more stable.

[0041] Continue to combine Figure 1 , Figure 2 and Figure 7 The heating element 7 of this embodiment is a coated heating disk, which is powered by a low-voltage power supply to generate heat to heat the water in the container 4. When the water in the container 4 is heated to the required temperature to achieve heat preservation, the container 4 of this embodiment can be made into a double-layer vacuum structure, so that the hand-pressed coffee machine has both the function of heat preservation and heating the water cup and the function of heating the hot water by itself for hand-pressed brewing of coffee, which greatly improves the practicality and portability of the hand-pressed coffee machine. This embodiment uses a coated heating disk as the heating element 7, which has the advantages of small size and fast heating speed of the heating element 7. Compared with the heating element 7 made of magnesium powder filled aluminum tube to form a heating tube and fixed by brazing, it reduces the occupied space, effectively saves the design space of the product, shortens the heating time, and improves the coffee making efficiency.

[0042] like Figure 1 , Figure 2 , Figure 8 and Fig. 9As shown, as a further preferred embodiment, the container 4 is provided with an upper cover 17 for sealing the container 4. The upper cover 17 is screwed on the container 4 to seal the container 4. The upper cover 17 is provided with a pressure relief protection device 18. When the heating element 7 heats the hot water in the container 4, the generated steam can be discharged to the outside through the pressure relief protection device 18 to prevent the pressure in the container 4 from being too high, thereby providing a pressure relief protection for the container 4. Figure 2 , Figure 8 and Fig. 9 , an air inlet valve device 19 is also provided on the upper cover 17. This device can make the interior of the container 4 communicate with the external atmosphere, and the atmosphere can enter the container 4 during the hand pressing process, but can prevent the water in the container 4 from leaking to the outside of the machine.

[0043] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the hand pump 2 of the embodiment of the present invention comprises a pump body 20 and a piston rod 21. The piston rod 21 is arranged in the piston cavity 22 of the pump body 20. The upper end of the piston rod 21 passes through the upper cover 17 and is provided with an operating handle 23. The joint valve 9 is arranged inside the lower end of the pump body 20. The outer portion of the lower end of the pump body 20 is provided with a sealing device 27 to separate the body 1 into a container cavity located at the upper part and a brewing cavity 5 located at the lower part. The container cavity can be directly used as a container 4, or another container 4 can be arranged in the container cavity. The specific selection can be made according to actual conditions. A groove 24 is provided in the middle of the inner side of the upper cover 17, and a thread is provided on the side wall of the groove 24. The upper end of the pump body 20 is provided with an external thread, and the upper end of the pump body 20 is threadedly connected to the groove 24.

[0044] The following is a description of the working process of the hand pump 2 coffee machine according to the embodiment of the present invention with reference to the accompanying drawings: First, the heating element 7 is powered on to generate heat, and the heat is transferred to the container 4 to heat the water in the container 4. When the water is heated to the water temperature for brewing coffee, the coffee (capsule) box is placed in the container 4 at the bottom of the machine body 1, and the piston rod 21 of the hand pump 2 is pulled up (see Figure 8 ), the water in the container 4 pushes open the water inlet check valve core 13 through the atmospheric pressure, and the water enters the piston cavity 22 from the water inlet 10; then the piston rod 21 of the hand pump 2 is pressed down (see Fig. 9 ), the generated water pressure pushes the one-way valve core 13 of the water inlet to seal the water inlet 10, and at the same time pushes open the one-way valve core 14 of the water outlet, and water is pressed out from the water outlet 11 of the hand pump 2, enters the water needle 25, and then enters the coffee (capsule) box to brew coffee.

[0045] The hand-pressed coffee machine of the embodiment of the present invention has ingenious design, simple principle, convenient operation and stable function.

[0046] Representative embodiments of the present invention have been described in detail. These detailed descriptions are not intended to limit the scope of the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the scope of protection of the present invention. Therefore, the combination of features in the foregoing detailed description is not necessary for implementing the present invention in the broadest scope, and alternatively only the representative embodiments of the present invention described in particular detail are taught. In addition, in order to obtain additional useful embodiments of the present invention, the various different features taught in the specification may be combined in a variety of ways, but these ways are not specifically exemplified.

Claims

1. A hand-pressed coffee machine, characterized in that: include: The machine body has a container for holding liquid on its upper part, a brewing chamber formed on its lower part, a through hole connecting the container and the brewing chamber formed in its middle part, a water-insertion needle arranged in the through hole, and a one-way valve assembly arranged between the container and the water-insertion needle or in the water-insertion needle; the bottom of the container has a connecting hole connected to the water-insertion needle and is provided with a heating element for heating the liquid; A hand pump is arranged in the container, and its upper part extends out of the container; the lower part of the hand pump has a joint valve, the joint valve is arranged in the connecting hole of the container, and the joint valve has a water inlet connected to the container and a water outlet connected to the water-inserting needle; The joint valve comprises a valve body, a water inlet one-way valve core arranged in the valve body for opening or closing the water inlet, and a water outlet one-way valve core for opening or closing the water outlet; the water inlet one-way valve core is provided with an elastic sealing member for sealing the water inlet when the water inlet is closed; The water inlet one-way valve core comprises a valve core body and a protrusion protruding from the valve core body so as to extend into and block the water inlet, and the elastic sealing member is sleeved on the protrusion and abuts against the valve core body; A coffee box disposed in the brewing chamber; When the hand pump is pulled up, the water in the container enters the hand pump from the water inlet under the action of atmospheric pressure; when the hand pump is pressed down, the water pressure generated can make the matched water inlet one-way valve core and the elastic sealing component seal the water inlet, and the water in the hand pump can be completely pressed out through the water outlet, enter the water-injection needle, and then enter the coffee box to brew coffee.

2. The hand-pressed coffee machine according to claim 1, characterized in that: A triggering member is protruding from the lower end of the joint valve, and the triggering member is used to push against the one-way valve assembly to put it in a conducting state.

3. The hand-pressed coffee machine according to claim 1, characterized in that: The container is a double-layer vacuum structure.

4. The hand-pressed coffee machine according to any one of claims 1 to 3, characterized in that: The heating element is a film-coated heating disk.

5. The hand-pressed coffee machine according to claim 1, characterized in that: The container is provided with an upper cover for sealing the container, and the upper cover is provided with a pressure relief protection device.

6. The hand-pressed coffee machine according to claim 5, characterized in that: An air intake valve device is arranged on the upper cover.

7. The hand-pressed coffee machine according to claim 5 or 6, characterized in that: The hand pump comprises a pump body and a piston rod, wherein the piston rod is arranged in the piston cavity of the pump body, the upper end of the piston rod passes through the upper cover and is provided with an operating handle; the joint valve is arranged in the lower end of the pump body; a sealing device is arranged outside the lower end of the pump body to isolate the body into a container cavity located at the upper part and the brewing cavity located at the lower part.

8. The hand-pressed coffee machine according to claim 7, characterized in that: A groove is provided in the middle of the inner side of the upper cover, and an internal thread is provided on the side wall of the groove; an external thread is provided at the upper end of the pump body, and the upper end of the pump body is threadedly connected to the groove.

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