Coffee moka pot

Abstract

The invention relates to a coffee moka pot which comprises an upper pot, a powder hopper and a lower pot, a liquid guide pipe is arranged in the upper pot, and a pressure increasing valve is installed at a guide outlet; the composite layer shell structure of the lower kettle consists of a stainless steel layer on the outer layer, an aluminum layer on the middle layer and a titanium layer on the inner layer; the pressure increasing valve comprises a valve bonnet, a valve element, a sealing plug and a spring; the valve bonnet is of a hollow structure with an opening in the bottom face, the valve bonnet is arranged on the outer side of the valve element in a sleeving mode and assembled in a sealed mode, and a transition chamber is defined between the valve element and the inner top of the valve bonnet. A lead-in hole and a lead-out hole are formed in the valve core and are used for communicating the transition chamber with the inner cavity of the upper kettle; the spring and the sealing plug are arranged in the transition chamber; one end of the spring is mounted at the top in the valve cap; and the sealing plug is used for blocking the lead-in hole of the valve core under the action of the elastic force of the spring and opening the lead-in hole of the valve core when the elastic force of the spring is overcome. The moka kettle has the advantages of being efficient in heat conduction, safe, free of precipitation, durable in structure and high in adaptability; and quick disassembly and assembly are facilitated, and residues are cleaned.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of moka pots, in particular to a coffee moka pot. BACKGROUND

[0002] A moka pot is a tool for extracting espresso coffee base. The common moka pot is divided into upper, middle and lower structures. The lower pot contains water, the middle powder pot contains coffee powder, and the upper pot contains the extracted coffee liquid. Its principle is to heat the water in the lower pot into steam, use the pressure of the steam to push the water into the powder pot to extract the coffee liquid, and then continue to push it to the upper pot through the liquid guide pipe in the upper pot to aggregate and flow out. For example, the moka pot disclosed in Chinese Invention Patent CN222942174U "Pressure regulating valve and moka pot".

[0003] The shell of the traditional moka pot is mostly made of a single material. The stainless steel version has uneven heat conduction, which affects extraction; the aluminum version has safety hazards; and the titanium version has high cost and poor adaptability. The existing composite material moka pot is mostly a complex one-piece structure, which is difficult to produce and difficult to balance heat conduction, safety and adaptability, and cannot meet the practical needs of ordinary users.

[0004] At the same time, the traditional moka pot pressure increasing valve is mostly one-piece or difficult to disassemble. Coffee residue is easily left inside after long-term use, making it difficult to clean, affecting hygiene and pressure increasing accuracy, and thus reducing the flavor of coffee extraction. During the cleaning process, parts are easily damaged, reducing the service life of the valve. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a coffee moka pot.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] A coffee moka pot, comprising an upper pot, a powder pot and a lower pot, the upper pot having a liquid guide pipe therein, and a pressure increasing valve being installed at the outlet of the liquid guide pipe;

[0008] The lower pot is a composite layer shell structure composed of a stainless steel layer as an outer layer, an aluminum layer as an intermediate layer and a titanium layer as an inner layer;

[0009] The pressure increasing valve comprises a valve cap, a valve core, a sealing plug and a spring;

[0010] The valve cap is a hollow structure with an open bottom, and the valve core is sleeved outside the valve cap and sealed and assembled by the outer sidewall of the valve core and the inner sidewall of the valve cap. A transition chamber is formed between the valve core and the inner top of the valve cap;

[0011] The valve core is provided with an inlet hole for connecting the liquid guide pipe and the transition chamber, and an outlet hole for connecting the transition chamber and the inner cavity of the upper pot;

[0012] The spring and the sealing plug are arranged in the transition chamber, one end of the spring is arranged on the inner top of the valve cap, and the other end of the spring is arranged on the sealing plug; the sealing plug is used for plugging the guide-in hole of the valve core under the spring elastic force and opening the guide-in hole of the valve core when the spring elastic force is overcome.

[0013] Preferably, the valve core bottom surface is provided with a tubular mounting seat at the position corresponding to the guide-in hole, and the mounting seat is inserted into the guide-out port of the guide tube and fixedly assembled.

[0014] Preferably, the inner top of the valve cap is provided with a first mounting groove, and one end of the spring is arranged in the first mounting groove.

[0015] Preferably, the sealing plug is in an inverted T-shaped structure and is composed of a vertical part and a horizontal part connected in an inverted T-shaped structure.

[0016] The vertical part is arranged in the first mounting groove, and the other end of the spring is sleeved outside the vertical part.

[0017] The horizontal part is used for plugging the guide-in hole of the valve core under the spring elastic force and opening the guide-in hole of the valve core when the spring elastic force is overcome.

[0018] Preferably, the inner side wall bottom end of the valve cap is provided with an annular second mounting groove, which is used for forming a valve core mounting chamber for mounting the valve core; and the outer side wall of the valve core is sealingly assembled with the side wall of the second mounting groove.

[0019] Preferably, the outer side wall of the valve core and the inner side wall of the second mounting groove are respectively provided with a groove matched with the sealing ring, and the sealing ring is arranged in the groove.

[0020] Compared with the prior art, the mocca kettle has the beneficial effects that: the mocca kettle is made of a composite shell, the material structure of the kettle body is optimized, the efficient heat conduction, safety without precipitation, durable structure and strong adaptability are considered, the performance defects of the traditional mocca kettle with single material are solved, and the complex structure and large production difficulty of the traditional mocca kettle with composite material are solved. Meanwhile, a booster valve replacement scheme is provided, and the scheme also has the advantages that the valve cap, the valve core and other components can be quickly disassembled and installed, the cleaning is convenient and thorough, and residue is avoided; meanwhile, the booster valve controls the opening and closing of the valve core through the balance of the spring elastic force and the internal pressure, so that the internal pressure is automatically adjusted according to the pressure change in the coffee extraction process, the coffee is extracted under the suitable pressure, and the coffee oil content and flavor level are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the mocca kettle in Example 2.

[0022] Figure 2 It is a structure schematic view of the mocca kettle in Example 2. Figure 1 It is a structure schematic view of the mocca kettle in Example 2.

[0023] Figure 3 This is a schematic diagram of the booster valve structure in Example 1;

[0024] Figure 4 for Figure 3 Cross-sectional view of the booster valve;

[0025] Figure 5 This is a cross-sectional view of the valve cap in Example 1;

[0026] Figure 6 This is a schematic diagram of the booster valve after the valve cap is removed in Example 1;

[0027] The diagram is labeled: 1 - Upper pot;

[0028] 2-Powder container;

[0029] 3- lower the pot;

[0030] 4-Liquid guide tube, 41-Outlet;

[0031] 5-Pressure booster valve, 51-Valve cap, 511-First mounting groove, 512-Second mounting groove, 52-Valve core, 521-Groove, 522-Inlet hole, 523-Outlet hole, 524-Mounting seat, 53-Sealing plug, 531-Horizontal part, 532-Vertical part, 54-Spring, 55-Sealing ring;

[0032] 6-Composite layer shell, 61-Stainless steel layer, 62-Aluminum layer, 63-Titanium layer. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] Example 1:

[0035] Reference Figures 1 to 6 As can be seen, this embodiment provides a pressure boosting valve 5, which is fixedly installed at the outlet 41 of the liquid guide tube 4 of the upper pot of the moka pot 1. When the coffee liquid in the liquid guide tube 4 reaches the corresponding pressure boosting intensity, the pressure boosting valve 5 is opened to allow the coffee liquid to flow into the upper pot 1.

[0036] The aforementioned pressure boosting valve 5 includes a valve cap 51, a spring 54, a sealing plug 53, a valve core 52, and a sealing ring 55.

[0037] The valve cap 51 is a hollow structure with an open bottom surface, and a first mounting groove 511 is formed in the inner top wall of the valve cap 51, which can be used to mount the spring 54 and also can be used to accommodate the sealing plug 53; an annular second mounting groove 512 is formed in the bottom end of the inner side wall of the valve cap 51, which means that the bottom surface of the second mounting groove 512 is the bottom surface of the valve cap 51; the cross section of the inner side wall of the valve cap 51 is in a stepped distribution, and the second mounting groove 512 can be used to mount the sealing ring 55 and adapt to install the valve core 52, so that the valve core 52 can be quickly loaded and positioned in the second mounting groove 512.

[0038] Moreover, in order to facilitate the installation of the sealing ring 55, a groove 521 matched with the sealing ring 55 is formed in the outer side wall of the valve core 52 and the inner side wall of the second mounting groove 512, respectively, and the sealing ring 55 is loaded into the groove 521, so that the valve core 52 can be sealed and assembled with the inner side wall of the second mounting groove 512 of the valve cap 51, having sealing and clamping functions, and the sealing ring 55 is made of silica gel material, having elastic and free dismounting effect.

[0039] The sealing plug 53 is in an inverted T-shaped structure, which is composed of a vertical part 532 and a horizontal part 531 connected in an inverted T shape, and the sealing plug 53 is made of silica gel plug, which is blocked under the action of the spring 54 to block the inlet hole 522 of the valve core 52, so that the liquid in the inlet hole 522 cannot flow out, and when the liquid pressure is greater than the spring force of the spring 54, the liquid pushes away the sealing plug 53 to flow out from the inlet hole 522.

[0040] The valve core 52 is loaded into the second mounting groove 512, and the outer side wall of the valve core 52 and the second mounting groove 512 are sealed by the sealing ring 55, so that the top end of the valve core 52 and the inner top wall and the inner side wall of the valve cap 51 enclose a transition chamber 56, so that the stepped distribution of the cross section of the inner side wall of the valve cap 51 also realizes the division between the transition chamber 56 and the valve core mounting chamber 57 (the chamber in the valve cap 51 for mounting the valve core 52, corresponding to the position of the second mounting groove 512); the inlet hole 522 is formed in the valve core 52 for the coffee liquid to enter the transition chamber 56 from the liquid guide pipe 4, that is, the liquid outside the booster valve 5 enters the transition chamber 56 inside the booster valve 5 through the inlet hole 522; the outlet hole 523 is also formed in the valve core 52 and communicates with the transition chamber 56, so that the coffee liquid in the transition chamber 56 flows out of the transition chamber 56 through the outlet hole 523 to the outside of the booster valve 5, and when the booster valve 5 is installed on the liquid guide pipe 4 in the upper kettle 1, the coffee liquid enters the upper kettle 1 through the outlet hole 523.

[0041] The sealing plug 53 is arranged in the transition chamber 56 corresponding to the inlet hole 522 of the valve core 52, and the spring 54 is arranged on the top wall of the valve cap 51 and the other end is arranged on the sealing plug 53. The spring 54 provides a pressurization force, so that the sealing plug 53 can normally block the inlet hole 522 of the valve core 52 under the action of the spring 54. One installation scheme with the effect of facilitating disassembly and cleaning is that one end of the spring 54 is arranged in the first installation groove 511 of the top wall of the valve cap 51, the other end of the spring 54 is sleeved outside the vertical portion 532 of the sealing plug 53, and the vertical portion 532 is also arranged in the first installation groove 511. When the horizontal portion 531 blocks the inlet hole 522 under the action of the spring 54, the vertical portion 532 also has a certain movement distance in the first installation groove 511, so that the sealing plug 53 can be pushed away by the coffee liquid to open the inlet hole 522. Therefore, when the spring force is overcome, the horizontal portion 531 can open the inlet hole 522 of the valve core 52. In this way, the spring 54 and the sealing plug 53 are arranged, and neither is fixedly installed with the valve cap 51 and the valve core 52. After the valve cap 51 is pulled off the valve core 52, the spring 54 and the sealing plug 53 can be flexibly removed for cleaning.

[0042] In order to install the above-mentioned pressure valve 5 on the flow guide pipe 4 of the upper kettle 1, the following installation scheme can be used: the valve cap 51 of the pressure valve 5 is sealingly sleeved outside the valve core 52, so that the bottom surface of the valve core 52 extends outwardly at a position corresponding to the inlet hole 522 to form a tubular mounting seat 524, and the mounting seat 524 is fixedly connected with the liquid guide pipe 4, for example, by welding, so that the outlet 41 of the liquid guide pipe 4 is in communication with the inlet hole 522 of the valve core 52. In this way, the valve cap 51 is not connected with the liquid guide pipe 4, but is assembled with the outlet 41 of the liquid guide pipe 4 through the mounting seat 524 on the bottom surface of the valve core 52, so as to realize the assembly of the pressure valve 5 and the liquid guide pipe 4. The mounting seat 524 protruding from the bottom surface of the valve core 52 can facilitate the insertion of the mounting seat 524 into the liquid guide pipe 4 for butt joint installation.

[0043] When the coffee liquid enters the inlet hole 522 of the valve core 52 from the outlet 41 of the liquid guide pipe 4 and reaches a corresponding pressure, the spring force is overcome, so that the horizontal portion 531 of the sealing plug 53 moves upward to unblock the inlet hole 522. In this way, the coffee liquid flows out of the inlet hole 522 into the transition chamber 56, and then flows out of the pressure valve 5 from the outlet hole 523 of the valve core 52 into the upper kettle 1. The pressure valve 5 controls the opening and closing of the valve core 52 through the balance between the spring force and the internal pressure, so as to realize pressure regulation. According to the pressure change in the coffee extraction process, the internal pressure can be automatically adjusted, so that the coffee is extracted under suitable pressure, and the coffee oil content and flavor level are improved.

[0044] The above-mentioned pressure increasing valve 5 has the advantages that the valve cap 51, the valve core 52 and other components can be quickly disassembled and installed, and can be thoroughly cleaned to avoid residue, without affecting the pressure increasing function, and ensuring the stable and accurate pressure during coffee extraction.

[0045] Embodiment 2:

[0046] The embodiment provides a coffee Moka pot, which comprises an upper pot 1, a powder hopper 2, a lower pot 3, and a pressure relief valve mounted on the lower pot 3. The upper pot 1 is internally provided with a liquid guide pipe 4. The structures and connection relationships of the upper pot 1, the powder hopper 2, the lower pot 3 and the liquid guide pipe 4 are prior art and will not be described here. The pressure increasing valve 5 in the embodiment 1 is mounted at the guide outlet 41 of the liquid guide pipe 4. The mounting seat 524 of the valve core 52 is inserted into the guide outlet 41 of the liquid guide pipe 4 to be fixedly connected and assembled. The welding method can be used to realize the butt joint communication between the guide outlet 41 and the guide inlet hole 522.

[0047] Water is poured into the lower pot 3, and the water level should not exceed the pressure relief valve. Coffee powder is put into the powder hopper 2. The bottom of the lower pot 3 is heated, and steam is generated in the lower pot 3. The steam pressure pushes the water into the powder hopper 2 to extract coffee liquid. The coffee liquid is pushed into the liquid guide pipe 4 by the steam and enters the guide inlet hole 522 of the valve core 52. When the coffee liquid gathers and the pressure increases to overcome the force of the spring 54 to remove the plugging of the sealing plug 53 to the guide inlet hole 522 of the valve core 52, the coffee liquid enters the transition chamber 56 through the guide inlet hole 522 and flows into the upper pot 1 through the guide outlet hole 523 of the valve core 52.

[0048] Furthermore, the lower pot 3 and the upper pot 1 of the Moka pot are respectively composed of a three-layer composite shell 6. The composite shell 6 is composed of an outer stainless steel layer 61, an intermediate aluminum layer 62 and an inner titanium layer 63. The three layers are attached by a simple hot pressing process to form a stable whole without the need for complex connecting components.

[0049] The outer stainless steel layer plays a supporting, scratch-resistant and wear-resistant role to ensure the strength and compatibility with the stove. The intermediate aluminum layer utilizes the good thermal conductivity of aluminum to quickly and uniformly transfer heat and improve the uniformity of heat conduction. The inner food-grade titanium layer is chemically stable, avoids the precipitation of metal ions and ensures the safety of coffee drinking. Moreover, titanium has a certain corrosion resistance, which prolongs the service life of the pot. During use, the outer layer is compatible with various stoves, the intermediate layer quickly conducts heat, and the inner layer ensures the safety of drinking. The structure is simple and practical. By optimizing the material structure of the pot, the heat conduction efficiency and safety are considered, the performance defects of the single material of the traditional Moka pot are solved, the complex structure and the difficulty of production of the traditional composite material Moka pot are overcome, the efficient heat conduction, safety without precipitation, durable structure and strong compatibility are considered, and the Moka pot is suitable for home use, small coffee shops and other scenes to meet the daily coffee extraction needs.

Claims

1. A coffee mocca kettle, comprising an upper kettle, a powder hopper, and a lower kettle, the upper kettle having a liquid guide tube therein, and a pressure increasing valve being installed at the outlet of the liquid guide tube, characterized in that: the lower kettle is a composite shell structure, which is composed of an outer stainless steel layer, an intermediate aluminum layer, and an inner titanium layer; the pressure increasing valve comprises a valve cap, a valve core, a sealing plug, and a spring; the valve cap is a hollow structure with an open bottom, and the valve core is sealingly assembled with the valve cap by the clamping of the outer sidewall of the valve core with the inner sidewall of the valve cap, and a transition chamber is formed between the valve core and the inner top of the valve cap; the valve core is provided with an inlet hole for connecting the liquid guide tube with the transition chamber, and an outlet hole for connecting the transition chamber with the inner cavity of the upper kettle; the spring and the sealing plug are arranged in the transition chamber, and one end of the spring is installed on the inner top of the valve cap and the other end is installed on the sealing plug; and the sealing plug is used to block the inlet hole of the valve core under the spring force and to open the inlet hole of the valve core when the spring force is overcome.

2. The mocca kettle according to claim 1, characterized in that: the valve core is provided with a tubular mounting seat at the position corresponding to the inlet hole, and the mounting seat is inserted into the outlet of the liquid guide tube for fixed assembly.

3. The mocca kettle according to claim 1, characterized in that: the inner top of the valve cap is provided with a first mounting groove, and one end of the spring is placed in the first mounting groove.

4. The mocca kettle according to claim 3, characterized in that: the sealing plug is in an inverted T-shaped structure, which is composed of a vertical part and a horizontal part connected in an inverted T shape; the vertical part is placed in the first mounting groove and the other end of the spring is sleeved on the outside of the vertical part; and the horizontal part is used to block the inlet hole of the valve core under the spring force and to open the inlet hole of the valve core when the spring force is overcome.

5. The mocca kettle according to claim 1, characterized in that: the inner sidewall of the valve cap is provided with an annular second mounting groove at the bottom end, which is used to form a valve core mounting chamber for mounting the valve core; and the outer sidewall of the valve core is sealingly assembled with the sidewall of the second mounting groove.

6. The mocca kettle according to claim 5, characterized in that: it further comprises a sealing ring; the outer sidewall of the valve core and the inner sidewall of the second mounting groove are respectively provided with grooves matched with the sealing ring, and the sealing ring is arranged in the grooves. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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