A heating boiler and coffee machine with an internal pipe

Abstract

The utility model discloses a kind of heating boiler and coffee machine with built-in pipeline, it is related to coffee equipment technical field, wherein heating boiler with built-in pipeline includes boiler, brewing extraction head, extraction supply line and heating assembly, extraction supply line includes pipe joint and furnace inner pipeline, furnace inner pipeline one end has pipeline water inlet, other end is connected with pipe joint, a part of furnace inner pipeline is arranged in parallel with a part of heating assembly.The utility model makes hot water in furnace inner pipeline from boiler to be conveyed to the process of brewing extraction head is all in heating environment, reduce temperature fluctuation caused by external pipeline heat dissipation, flow control valve adjusts water flow in constant temperature environment, avoid external environment interference, a part of furnace inner pipeline is arranged in parallel with a part of heating assembly, guarantee the water flow in furnace inner pipeline in flowing process always be in the range of heating assembly heat radiation and hot water coating, realize extraction accurate temperature control.

Description

Technical Field

[0001] This utility model relates to the field of coffee equipment technology, and in particular to a heating boiler and coffee machine with built-in pipes. Background Technology

[0002] Current coffee machine extraction methods involve supplying water to the brew head via an external metal pipe connected to a boiler, with a control valve allowing the user to adjust the flow rate. Because both the external metal pipe and the control valve, located away from the boiler, dissipate heat during the water supply process, a 5°C to 6°C temperature difference exists between the water in the brew head's extraction chamber and the water in the boiler. Coffee machines are extremely sensitive to extraction temperature; a deviation of even 0.5°C can significantly impact coffee extraction. The heat dissipation from the external metal pipe and the control valve, both far from the boiler, causes a large temperature difference between the water reaching the extraction chamber and the water in the boiler, greatly affecting the extraction process. Summary of the Invention

[0003] The purpose of this invention is to provide a heating boiler and coffee machine with built-in pipes, in order to solve the problems mentioned above.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] In a first aspect, this application provides a heating boiler with built-in pipes, comprising:

[0006] boiler;

[0007] The brewing and extraction head is installed at one end of the boiler;

[0008] An extraction supply pipeline is installed inside the boiler and is used to supply water to the boiling extraction head;

[0009] A heating assembly is installed inside the boiler for heating cold water;

[0010] The extraction supply pipeline includes:

[0011] A pipe joint is provided on the furnace wall adjacent to the brewing and extraction head, and one end of the pipe joint is connected to the brewing and extraction head through a pipe;

[0012] The furnace pipe has a water inlet at one end and is connected to the pipe joint at the other end. A portion of the furnace pipe is arranged parallel to a portion of the heating assembly and flows through a flow control valve, which is located on the furnace wall of the boiler.

[0013] In one possible implementation, a portion of the heating assembly is located at the bottom of and near the furnace duct.

[0014] In one possible implementation, the furnace piping includes:

[0015] The first pipeline has a water inlet at one end and is connected to the flow control valve at the other end.

[0016] The second pipeline has one port connected to the flow control valve and the other port connected to the pipe joint.

[0017] In one possible implementation, the heating element is located slightly below the center of the boiler.

[0018] In one possible implementation, the first conduit is arranged parallel to a portion of the heating assembly.

[0019] In one possible implementation, the second pipeline is inclined, and the height A of the second pipeline near the pipe joint is greater than the height B of the second pipeline near the flow control valve.

[0020] In one possible implementation, the shortest distance d1 between the pipe joint and the heating component is less than the shortest distance d2 between the pipe inlet and the heating component.

[0021] In one possible implementation, the end of the first pipeline near the pipeline inlet is installed into a mounting groove on the inner wall of the boiler.

[0022] In one possible implementation, the lower end of the boiler is equipped with a water inlet.

[0023] Secondly, this application also provides a coffee machine that includes a heating boiler with built-in pipes as provided in the first aspect above.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0025] In this invention, by placing the extraction supply pipeline inside the boiler, the hot water in the extraction supply pipeline remains in a heated environment as it flows from the boiler to the brewing extraction head. This avoids heat loss caused by contact with the environment in traditional external pipelines, reducing water temperature fluctuations. The flow control valve is directly installed on the boiler wall, allowing the hot water flow regulation to be completed in a constant temperature environment. This avoids the temperature drop and fluctuation problems caused by heat dissipation when the hot water flows through the external flow control valve in traditional solutions. Furthermore, the pipeline inside the boiler is arranged parallel to a portion of the heating assembly, ensuring that the water flow in the pipeline is always within the range of heat radiation from the heating assembly and the coverage of the hot water during the flow process. This forms a dynamic temperature compensation mechanism, ensuring that the water temperature obtained by the brewing extraction head is uniform and stable, achieving precise control of water temperature during coffee extraction. Attached Figure Description

[0026] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0027] Figure 2 This is the second structural schematic diagram of the present invention;

[0028] Figure 3 This is a cross-sectional view of the present invention;

[0029] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 This is a schematic diagram showing the first heating element located inside the second furnace body in this utility model;

[0031] Figure 6 This is a cross-sectional view of the second pipeline in this utility model.

[0032] Marked in the image:

[0033] 1. Boiler; 101. First furnace body; 102. Second furnace body; 103. Storage chamber; 104. Flow channel; 105. Mounting groove;

[0034] 2. Brewing and extraction head; 201. Installation space;

[0035] 3. Heating components; 301. First heating element; 302. Second heating element;

[0036] 4. Extraction supply pipeline; 401. Pipeline inlet; 402. Pipeline joint;

[0037] 5. Water inlet; 501. Extension section; 502. Water supply hole; 503. Drain hole;

[0038] 6. Flow control valve; 7. First pipeline; 8. Second pipeline. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0040] use Figures 1-2 The overall structure of this heating boiler with built-in pipes will be described. Figure 1 This is one of the structural schematic diagrams of this utility model. Figure 2 This is the second structural schematic diagram of the present invention.

[0041] Reference Figure 3 As shown, Figure 3This is a cross-sectional view of the present invention. The heating boiler with built-in pipes includes a boiler 1, a boiling extraction head 2, a water inlet 5, an extraction supply pipeline 4, and a heating assembly 3, wherein:

[0042] Boiler 1 includes a first furnace body 101 and a second furnace body 102 arranged sequentially. The first furnace body 101 has a storage chamber 103 inside for storing supplied water. The second furnace body 102 has a flow channel 104 connected to the storage chamber 103, allowing water in the storage chamber 103 to flow along the flow channel 104 into the second furnace body 102. The first furnace body 101 and the second furnace body 102 are connected in a roughly linear arrangement. The flow space formed by the facing connection of the first furnace body 101 and the second furnace body 102 refers to the continuous water flow channel formed by the two furnace bodies connected by an interface, such as a flange connection or an integral molding structure. The flow channel 104 guides the water flow direction and prevents disorderly mixing of hot and cold water.

[0043] The brewing and extraction head 2 is installed at one end of the boiler 1. Specifically, the brewing and extraction head 2 is installed at one end of the second furnace body 102. An installation space 201 is provided at one end of the second furnace body 102. The installation space 201 is connected to the flow channel 104, and the brewing and extraction head 2 is installed in the installation space 201. The brewing and extraction head 2 is used for brewing and extracting coffee to produce coffee liquid.

[0044] The water inlet 5 is located at the lower end of the first furnace body 101 and is used for water supply to the first furnace body 101.

[0045] The extraction supply pipeline 4 is installed inside the boiler 1 and can be used to supply water for boiling the extraction head 2. Specifically, the extraction supply pipeline 4 is installed inside the second furnace body 102. One end of the extraction supply pipeline 4 has a pipeline inlet 401, and the other end of the extraction supply pipeline 4 is connected to the boiling extraction head 2, so that the water entering along the inlet end 5 enters the pipeline inlet 401 along the storage chamber 103 and the flow channel 104, thereby realizing the supply of water to the boiling extraction head 2.

[0046] Heating component 3 is installed inside boiler 1 and positioned slightly below the center of boiler 1 for heating cold water. Specifically, heating component 3 is installed inside the first furnace body 101 to heat the water inside the first furnace body 101 and the second furnace body 102. The heated water is then supplied to the brewing and extraction head 2 to achieve coffee brewing and extraction. Heating component 3 includes a first heating element 301 and a second heating element 302.

[0047] A portion of the heating component 3 passes through the storage chamber 103 and the flow channel 104 and extends into the second furnace body 102, so that the hot end of the heating component 3 is close to the water inlet 401 in the extraction supply pipeline 4. The mixing area of ​​hot and cold water in the boiler 1 is concentrated in the first furnace body 101, which reduces the water temperature fluctuation in the second furnace body 102. One end of the heating component 3 is located in the second furnace body 102 and close to the water inlet 401, which avoids heat dissipation and heat loss from external pipelines, ensures the stability of the water temperature, and enables the brewing extraction head 2 to obtain hot water with precise and controllable temperature, significantly improving the coffee extraction quality and achieving stable temperature control during extraction.

[0048] In this embodiment, cold water enters from the inlet 5 of the first boiler body 101 and mixes with the hot water in the first boiler body 101. This mixing area is separated from the second boiler body 102 by the flow channel 104. Therefore, the impact of the hot and cold mixing in the first boiler body 101 on the hot water temperature in the second boiler body 102 is significantly reduced, effectively isolating the hot and cold water mixing area within the boiler 1 and ensuring the stability of the outlet water temperature in the second boiler body 102. Compared with the prior art, the traditional boiler 1 uses a single-cavity structure, resulting in hot and cold water mixing, while this embodiment achieves hot and cold area isolation through dual-boiler flow diversion.

[0049] Those skilled in the art will understand that heating elements (such as heating wires, heating rods, etc.) have a cold end (where the electrode connection has low contact resistance and generates less heat) and a hot end (where the heat is more concentrated at the end away from the electrode connection). Traditional heating elements are only locally arranged at the bottom or top of the boiler 1, resulting in uneven heating of the hot water inside the boiler 1. Furthermore, the semi-automatic coffee boiler 1 uses a one-in-one-out system when using water. While hot water is output through the outlet, cold water is also injected through the inlet 5, further amplifying the local temperature difference inside the boiler 1. This makes it difficult to control the outlet water temperature.

[0050] In this embodiment, a portion of the heating component 3 can be used to heat the water flow throughout the entire process, improving the efficiency of heat energy utilization. The hot end of the heating component 3 is located in the second furnace body 102 where the extraction supply pipeline 4 is located, ensuring the stability of the outlet water temperature. The mixing area of ​​hot and cold water in the boiler 1 is concentrated in the first furnace body 101, reducing the water temperature fluctuation in the second furnace body 102. Furthermore, the hot end of the heating component 3 is located in the second furnace body 102 and near the water inlet 401 of the pipeline and the brewing extraction head 2, avoiding heat dissipation and heat loss from external pipelines, which could lead to inaccurate hot water temperature supplied to the brewing extraction head 2. This ensures the stability of the outlet water temperature, allowing the brewing extraction head 2 to obtain hot water with a precise and controllable temperature, significantly improving the quality of coffee extraction.

[0051] like Figure 3 As shown, Figure 3 This is a cross-sectional view of the present invention. The extraction supply pipeline 4 also includes a pipe joint 402 and an in-furnace pipeline.

[0052] Pipe joint 402 is located inside the second furnace body 102 and is located on the furnace wall adjacent to the brewing and extraction head 2. One end of pipe joint 402 is connected to the brewing and extraction head 2 through a pipe. Pipe joint 402 is close to the heating component 3.

[0053] One end of the furnace pipe has a water inlet 401, and the other end of the furnace pipe is connected to a pipe joint 402. A part of the furnace pipe is arranged parallel to a part of the heating component 3. A part of the heating component 3 is located at the bottom of the furnace pipe and close to the furnace pipe, and flows through a flow control valve 6. The flow control valve 6 is set on the furnace wall of the boiler 1.

[0054] In this embodiment, the water inlet 401 in the second furnace body 102 forms an internal communication structure through the furnace pipe and the pipe joint 402. The furnace pipe is arranged parallel to the extension direction of the heating component 3, so that the water flow continuously absorbs the heat released by the heating element during the flow process, reduces the water temperature fluctuation caused by heat dissipation from the external pipe, ensures the stability of the outlet water temperature, and meets the precise requirements of constant temperature hot water for coffee extraction.

[0055] Furthermore, the flow control valve 6 is integrated into the boiler wall of boiler 1, preventing temperature drops caused by hot water flowing through external pipes during flow regulation. For example, in a conventional solution, when the brewing extraction head 2 needs water, hot water flows from the external pipe of boiler 1 to the flow control valve 6. The flow control valve 6 adjusts the water flow in real time according to demand, and then supplies water to the brewing extraction head 2 through the external pipe. During the flow regulation process, the hot water in the pipe loses heat due to external environmental factors. In this embodiment, a portion of the internal pipe is arranged parallel to a portion of the heating component 3 and located inside boiler 1, ensuring that the water flow is always within the heat radiation range of the heating element or within the hot water coverage of boiler 1, maintaining a constant water temperature.

[0056] Compared to existing technologies, in traditional solutions, the flow control valve 6 is typically installed outside the boiler 1. Hot water must flow through external pipes and valves to reach the brewing and extraction head 2, resulting in heat loss and susceptibility to ambient temperature. This embodiment directly fixes the flow control valve 6 to the boiler wall and integrates the extraction supply pipeline 4 within the boiler 1. This ensures the hot water flow path is entirely within the thermal field coverage of the heating element 3, eliminating interference from the external environment on water temperature and flow control. This implementation achieves stable water temperature control during the brewing and extraction head 2 water supply process, reducing temperature fluctuations caused by heat dissipation from external pipes and avoiding the temperature unevenness problems caused by alternating hot and cold temperatures or excessively long paths in traditional solutions. This meets the precise requirement of constant-temperature hot water for coffee extraction.

[0057] In some embodiments, such as Figure 3 As shown, Figure 3This is a cross-sectional view of the present invention. The furnace piping includes a first pipe 7 and a second pipe 8.

[0058] One end of the first pipe 7 has a pipe inlet 401. The end of the first pipe 7 near the pipe inlet 401 is installed in the mounting groove 105 on the inner wall of the boiler 1, and the other end is connected to the flow control valve 6. One end of the second pipe 8 is connected to the flow control valve 6, and the other end is connected to the pipe joint 402. The shortest distance d1 between the pipe joint 402 and the heating element 3 is less than the shortest distance d2 between the pipe inlet 401 and the heating element 3.

[0059] In this embodiment, the first pipeline 7 and the second pipeline 8 refer to the basic flow guiding structure installed inside the boiler 1 and connected to the flow control valve 6. Specifically, they can be implemented using stainless steel or copper pipes. Their function is to guide the heated water in the boiler to the flow control valve 6 and then to the pipe joint 402. The shortest distance difference refers to the spatial difference between the pipeline inlet 401 or the pipe joint 402 and the heating component 3 (i.e., the first layer heating element 301). Because the pipe joint 402 is closer to the first layer heating element 301, even if there is a slight heat loss when flowing through the flow control valve 6, the heat radiated from the hot end of the heating element can be absorbed at the second pipeline 8 and the pipe joint 402 after the flow control valve 6, ensuring precise temperature control of the extraction supply pipeline 4. Traditional solutions place the water supply pipes outside the boiler 1, resulting in heat loss. In contrast, this solution completely integrates the pipes inside the boiler 1, directly utilizing the high-temperature environment around the heating element to maintain the water temperature. This forms a dynamic temperature compensation mechanism, ensuring that the water flow temperature obtained by the brewing and extraction head 2 is uniform and stable, thus achieving precise control of the water temperature during the coffee extraction process.

[0060] Furthermore, the first pipe 7 is arranged in parallel with a part of the heating component 3, so that the water flow continuously absorbs the heat released by the heating element during the flow process, reducing water temperature fluctuations caused by heat dissipation from external pipes and ensuring stable outlet water temperature.

[0061] The flow control valve 6 is a three-way solenoid valve with an inlet, an outlet, and a pressure relief port. One end of the first pipe 7 is connected to the inlet, and one end of the second pipe 8 is connected to the outlet. Water entering through the inlet 401 can flow along the first pipe 7, through the inlet 401, the first pipe 7, the inlet, the flow control valve 6, the outlet, and the second pipe 8 to the brewing and extraction head 2, thus supplying water to the brewing and extraction head 2.

[0062] like Figure 6 As shown, Figure 6This is a cross-sectional view of the second pipeline 8 in this utility model. The second pipeline 8 is inclined, and the height A of the second pipeline 8 near the pipe joint 402 is greater than the height B of the second pipeline 8 near the flow control valve 6. The structural height difference helps the residual water to flow downward along the waterway and be discharged through the pressure relief port under the action of gravity after extraction, reducing water retention, preventing residual water from flowing back to the boiler 1, avoiding water pollution caused by backflow in the boiler 1, improving waterway hygiene, and avoiding problems such as scale buildup inside the equipment and pipeline contamination.

[0063] In some embodiments, such as Figure 3 As shown, Figure 3 This is a cross-sectional view of the present invention. Regarding the specific structure of the heating component 3, the heating component 3 includes a first heating element 301 and a second heating element 302 distributed vertically. The first heating element 301 and the second heating element 302 are devices capable of converting electrical energy into heat energy, specifically employing one or a combination of rod-shaped electric heating units, spiral electric heating bars, or U-shaped heating bars. In actual use, a suitable heating element structure can be selected according to the specific shape of the internal flow channel 104 of the boiler 1 to improve the heating efficiency of water flowing from the cold end to the hot end.

[0064] The first heating element 301 penetrates along the side of the first furnace body 101 away from the second furnace body 102, and extends through the storage cavity 103 and the flow channel 104 into the second furnace body 102. The first heating element 301 is located slightly below the space of the flow channel 104, and its extension direction is consistent with the extension direction of the flow channel 104 to achieve through heating. It is brought close to the water inlet 401 in the extraction supply pipeline 4, so as to accurately heat the water at the water inlet 401 to achieve stable temperature control during extraction.

[0065] The lower setting of the first heating element 301 means that the vertical height of the first heating element 301 in the space of the flow channel 104 is lower than the central axis of the flow channel 104. Specifically, the heating element can be fixed in a preset area at the bottom of the flow channel 104 by a support structure or positioning device, so as to ensure that the gap between the first heating element 301 and the bottom of the flow channel 104 is in the path of natural sinking of cold water.

[0066] The second heating element 302 is located at the bottom of the first heating element 301 and inside the storage cavity 103. The purpose of this arrangement is to uniformly heat the water in the storage cavity 103 and to uniformly heat the water in the boiler 1.

[0067] In this embodiment, when cold water enters the first furnace body 101 from the inlet 5, it naturally sinks to the bottom area of ​​the storage chamber 103 and the bottom area of ​​the flow channel 104 due to its higher density. At this time, the second heating element 302, located slightly below, heats the cold water sinking to the bottom area of ​​the storage chamber 103, while the first heating element 301 heats the cold water sinking to the bottom area of ​​the flow channel 104. The heated water has a lower density and flows upward along the flow channel 104, forming a bottom-up thermal convection circulation. The layered heating by the first heating element 301 and the second heating element 302 can effectively reduce the temperature stratification caused by the mixing of hot and cold water in the boiler 1, improve heating efficiency, and keep the temperature of the hot water output from the extraction supply pipeline 4 stable, thereby achieving stable temperature control during the extraction process of the boiling extraction head 2.

[0068] Compared with existing technologies, in traditional solutions, the heating element is usually located in the middle or upper part of the boiler 1, and the mixing of cold water with the heated water after entering leads to local temperature differences. In this embodiment, the first layer of heating element 301 and the second layer of heating element 302 are arranged in a layered layout, which uses the natural density difference between cold and hot water to guide the water flow path, eliminating the formation of mixing areas. Furthermore, the through-type heating structure covers the entire space of the flow channel 104, so that a stable thermodynamic equilibrium is formed inside the boiler 1.

[0069] In some embodiments, such as Figure 1 and Figure 3 As shown, Figure 1 This is one of the structural schematic diagrams of this utility model. Figure 3 This is a cross-sectional view of the present invention. Regarding the specific structure of the first furnace body 101 and the second furnace body 102: The inner diameter of the first furnace body 101 is larger than the inner diameter of the second furnace body 102. An opening is formed at the top of one end face of the first furnace body 101. One end of the second furnace body 102 is installed onto the opening, connecting its storage cavity 103 to the flow channel 104. The second heating element 302 is located at the bottom of the storage cavity 103. In this embodiment, the first furnace body 101 has a larger volume, capable of storing a larger amount of water. The first heating element 301 and the second heating element 302 are arranged in layers, and the second heating element 302 is located at the bottom of the storage cavity 103, which can be used to uniformly heat the water at the bottom of the storage cavity 103.

[0070] In some embodiments, such as Figure 3 As shown, Figure 3 This is a cross-sectional view of the present invention. The boiler 1 has a first water passage and a second water passage.

[0071] The first water path, when water is supplied, water enters from the inlet end 5 and exits from the extraction supply pipeline 4, and cold water flows from the inlet end 5 and / or the first furnace body 101 to the extraction supply pipeline 4 and / or the second furnace body 102.

[0072] In the second water path, when no water is supplied, hot water flows from the hot end of the heating component 3 and / or the second furnace body 102 to the cold end of the heating component 3 and / or the first furnace body 101.

[0073] The first waterway and the second waterway form a circulating waterway.

[0074] The first water path refers to the cold water flow path formed under water supply conditions. This is achieved by driving unidirectional cold water flow through the pressure difference between the inlet and outlet pipes. The first water path guides the cold water to flow in a fixed direction during the boiling process. The second water path refers to the natural convection path of hot water formed under non-water supply conditions. This is achieved by driving the hot water to flow in the opposite direction through the thermosiphon effect. The second water path maintains the circulating heat distribution within the furnace when water is not supplied. The circulating water path is a closed loop formed by the first and second water paths. This can be achieved through a spatial intersection or parallel structure of the two water paths. The circulating water path is used to achieve dynamic heat exchange under different operating conditions.

[0075] It should be noted that during the brewing and water supply process of a semi-automatic coffee machine, an external water pump rotates and injects cold water into the first boiler body 101 through the water inlet 5, while hot water is output from the water outlet. The boiler 1 is normally in a full water state. Therefore, in a traditional boiler 1, only a one-way water flow path is set up or water is directly injected into the boiler 1 through the water inlet 5. The mixing of hot and cold water causes temperature differences in different areas of the boiler 1. In this case, it is difficult to accurately control the water temperature when water is supplied through the water outlet. Similarly, when no water is supplied, the temperature is maintained by local heating with a heater, which also results in significant temperature differences in different areas of the boiler body.

[0076] In this embodiment, when the semi-automatic coffee machine is brewing and supplying water, an external water pump (rotary pump) injects cold water into the first boiler body 101 through the water inlet 5, while hot water is output from the extraction supply pipeline 4 in the second boiler body 102. The cold water mixes with the hot water in the boiler 1 in the first boiler body 101, and the mixed cold and hot water flows along the first water path toward the second boiler body 102, absorbing heat from the heating element in the process. The flow path of the cold water is limited to a specific channel, which greatly reduces the impact of the cold water temperature at the water inlet 5 on the hot water temperature in the extraction supply pipeline 4.

[0077] When no water is supplied, the hot end of the first heating element 301 creates a high-temperature zone in the area of ​​the second furnace body 102. Due to the density difference, the hot water flows back towards the first furnace body 101 along the second water path. Because the heating efficiency of the hot end of the first heating element 301 in the second furnace body 102 is greater than that of the cold end of the heating element in the first furnace body 101, water flows from the hot end to the cold end, forming a circulating water path between the first and second water paths. The two water paths are connected through the internal chamber of the boiler 1, forming complementary flow paths in space, and achieving temperature balance using the principles of fluid dynamics.

[0078] Furthermore, the hot water in the second furnace body 102 rises due to heat, while the cold water in the first furnace body 101 sinks. This causes the hot water in the second furnace body 102 to flow from the top of the second furnace body 102 along the top of the flow channel 104 into the first furnace body 101, while the cold water at the bottom of the first furnace body 101 flows along the bottom of the flow channel 104 into the second furnace body 102, forming a closed-loop thermal circulation. Temperature stratification is eliminated through thermal convection, and water temperature uniformity can be maintained without relying on external insulation equipment.

[0079] Compared with existing technologies, traditional boilers 1 only have a unidirectional water flow path. When the boiler is shut down, it relies on local heating by the heater to maintain the temperature, resulting in significant temperature differences in different areas of the boiler body. In contrast, the solution of this application establishes a bidirectional circulating water path system, which achieves directional flow temperature control when water is supplied and eliminates temperature stratification through thermal convection when water is not supplied. It can maintain water temperature uniformity without relying on external insulation equipment and can also ensure the temperature stability of the extraction supply pipeline 4.

[0080] In some embodiments, such as Figure 3 As shown, Figure 3 This is a cross-sectional view of the present invention. The first furnace body 101 is cylindrical in shape, with the columnar axis arranged horizontally. The columnar shape means that the first furnace body 101 adopts a cylindrical, prismatic, or columnar geometric structure. Specifically, it can be formed into a hollow cylindrical structure using stainless steel casting technology. Its internal spatial symmetry helps to distribute the water flow evenly. The flow channel 104 is arranged in the same direction as the extension direction of the columnar axis, so that the cold water injected from the water inlet 5 is first mixed with hot water in the cylindrical furnace body, and then flows along the straight flow channel 104 to the second furnace body 102.

[0081] The first heating element 301 is arranged along the extension direction, so that when the water in the first furnace body 101 flows to the second furnace body 102, it is radiated by the heat from the first heating element 301.

[0082] Compared with existing technologies, traditional coffee machine boilers often employ irregular cavity structures, resulting in disordered water flow due to the constraints of the cavity shape. This leads to uneven heating of the water within the cavity and makes it impossible to precisely control the water temperature in the extraction supply pipeline 4. In the solution of this application, the water flow direction is constrained by a columnar shape, forming a directional flow path with the flow channel 104 and the first heating element 301. The first heating element 301 extends along the axial direction of the column, and heat diffuses radially from the first heating element 301, covering the water flow path and effectively improving heat transfer efficiency.

[0083] In some embodiments, such as Figure 3 and Figure 5 As shown, Figure 3 This is a cross-sectional view of the present invention. Figure 5This is a schematic diagram showing the first heating element 301 disposed inside the second furnace body 102 in this utility model. The length H of the first heating element 301 inside the second furnace body 102 is greater than half of the total length D of the second furnace body 102 in the extending direction. In this embodiment, the total length D of the second furnace body 102 refers to the maximum span of the internal space of the second furnace body 102 along the extending direction, which can be determined by measuring the distance between the inner walls of the two ends of the second furnace body 102 in the direction of the heating element axis. H being greater than half of D means that the end of the first heating element 301 extends beyond the geometric center point of the second furnace body 102. That is to say, more than half of the space area of ​​the second furnace body 102 is located in the high-temperature zone formed around the heated end, which can effectively ensure the water temperature of the second furnace body 102, thereby improving the water temperature stability during the coffee extraction process.

[0084] Specifically, when water flows from the storage chamber 103 into the flow channel 104, guided by the extension direction of the first heating element 301, the water flows continuously along the surface of the first heating element 301. Since the coverage area of ​​the first heating element 301 within the second furnace body 102 exceeds half the total length of the furnace body, most of the water entering the second furnace body 102 can receive heat radiation from the hot end of the first heating element 301. The heat in the high-temperature zone offsets the instantaneous cooling effect of the water flow through heat conduction, avoiding temperature fluctuations in the extraction supply pipeline 4 due to alternating hot and cold temperatures, thus ensuring sufficient heat exchange at the water outlet.

[0085] Compared to existing technologies, traditional boilers 1's heating element only covers the central area of ​​a single boiler body, resulting in a low-temperature blind zone near the water outlet, which easily leads to thermal stratification when water flows through it. This embodiment extends the first heating element 301 from the first boiler body 101 to the second boiler body 102, allowing the high-temperature area to extend directly to the vicinity of the water inlet 401 in the extraction supply pipeline 4. Cold water is mixed with hot water in the first boiler body 101 and heated by the first heating element 301. Furthermore, as it flows through the storage chamber 103 and the flow channel 104, it undergoes heat exchange and further heating by the first heating element 301 before finally entering the second boiler body 102. This ensures that the deviation between the water supply temperature of the extraction supply pipeline 4 and the set temperature of the boiler 1 is controlled within an allowable range, improving water temperature stability during coffee extraction.

[0086] In some embodiments, such as Figure 3 and Figure 4 As shown, Figure 3 This is a cross-sectional view of the present invention. Figure 4 This utility model Figure 3 Enlarged schematic diagram at point A. The water inlet 5 is installed at the bottom of the first furnace body 101. The bottom of the water inlet 5 has a water inlet pipe. One end of the water inlet pipe is connected to an external rotary pump for water supply, and the other end passes through the wall of the first furnace body 101 and extends into the first furnace body 101 to form an extension section 501.

[0087] When the external rotary pump delivers cold water to the first furnace body 101 through the inlet pipe, the cold water preferentially accumulates at the bottom of the first furnace body 101 due to gravity, because the outlet of the inlet pipe is positioned lower than the second heating element 302. The cold water absorbs heat from the furnace body at the bottom and gradually heats up, forming a natural convection from bottom to top. Meanwhile, the area above the first heating element 301 maintains a higher temperature, reducing the impact of the mixing of hot and cold water in the first furnace body 101 on the temperature stability of the second furnace body 102. This ensures that the water temperature in the extraction supply pipeline 4 remains uniform and stable, improving the accuracy of water temperature control during coffee extraction.

[0088] The top of the extension section 501 is provided with a plurality of water supply holes 502 in a ring. When cold water is supplied to the interior of the first furnace body 101 through the water inlet end 5, the plurality of water supply holes 502 in a ring can supply water evenly to the interior of the storage cavity 103. Thus, the plurality of water supply holes 502 can disperse water into the boiler 1 so that the water entering the boiler 1 is mixed evenly with the water in the boiler 1.

[0089] In addition, in order to facilitate the drainage of water in the first furnace body 101, a drain hole 503 is provided at the bottom of the water supply hole 502. Since the extension section 501 is located at the bottom of the first furnace body 101, the water in the boiler 1 can be easily drained through the drain hole 503.

[0090] On the other hand, this utility model embodiment also provides a coffee machine, which includes a heating boiler with built-in pipes as described in one or more of the above optional embodiments. The brewing and extraction head 2 of the coffee machine is fixed below the second boiler body 102, and the brewing and extraction head 2 is provided with a brewing pipe connected to a pipe connector 402. The brewing pipe is not exposed to the outside but is built into the brewing and extraction head 2. The brewing pipe directly connects the second boiler body 102 and the brewing and extraction head 2 to avoid heat loss from external pipes.

[0091] Compared with the prior art, the coffee machine provided by this utility model has a dual furnace structure and a heating component 3 that runs through the flow channel 104. The hot end of the heating component 3 (i.e., the first heating element 301) is located near the water inlet 401 in the extraction supply pipeline 4, which effectively ensures the stability of the water temperature of the extraction supply pipeline 4. In addition, the use of in-furnace pipes for water output and flow control reduces the influence of the external environment on the water temperature, thereby ensuring the stability of the water supply temperature of the brewing extraction head 2 and improving the coffee extraction quality.

[0092] Through the above technical solution, this application achieves precise control of the water supply temperature of the brewing extraction head 2. The water is directly output after being fully heated inside the boiler 1, avoiding the 5-6℃ temperature fluctuations caused by traditional external pipes. The flow path of the first water channel inside the boiler 1 effectively prevents localized temperature differences caused by the mixing of hot and cold water, ensuring a uniform and stable temperature in the extraction supply pipeline 4. The hot end of the heating component 3 (i.e., the first layer heating element 301) is arranged inside the second furnace body 102 and adjacent to the extraction supply pipeline 4. Heating by the second layer heating element 302 can uniformly heat the water in the storage chamber 103, thereby ensuring the stability of the water supply temperature.

[0093] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

[0094] In the description of this utility model, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0095] Furthermore, in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0096] On the other hand, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "located in," "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A heating boiler with built-in pipes, characterized in that, include: Boiler (1); The boiling extraction head (2) is installed at one end of the boiler (1); An extraction supply pipeline (4) is installed inside the boiler (1) for supplying water to the boiling extraction head (2); Heating component (3) is installed inside the boiler (1) for heating cold water; The extraction supply pipeline (4) includes: A pipe connector (402) is provided on the furnace wall adjacent to the brewing and extraction head (2), and one end of the pipe connector (402) is connected to the brewing and extraction head (2) through a pipe; The furnace pipe has a water inlet (401) at one end and is connected to the pipe joint (402) at the other end. A part of the furnace pipe is arranged parallel to a part of the heating assembly (3) and flows through a flow control valve (6). The flow control valve (6) is located on the furnace wall of the boiler (1).

2. The heating boiler with built-in pipes according to claim 1, characterized in that, A portion of the heating assembly (3) is located at the bottom of the furnace pipe and close to the furnace pipe.

3. The heating boiler with built-in pipes according to claim 2, characterized in that, The furnace piping includes: The first pipeline (7) has a pipeline inlet (401) at one end and is connected to the flow control valve (6) at the other end. The second pipeline (8) has one port connected to the flow control valve (6) and the other port connected to the pipe joint (402).

4. The heating boiler with built-in pipes according to claim 1, characterized in that, The heating element (3) is located slightly below the space of the boiler (1).

5. The heating boiler with built-in pipes according to claim 3, characterized in that, The first pipeline (7) is arranged in parallel with a part of the heating assembly (3).

6. The heating boiler with built-in pipes according to claim 3 or 5, characterized in that, The second pipeline (8) is inclined, and the height A of the second pipeline (8) near the pipe joint (402) is greater than the height B of the second pipeline (8) near the flow control valve (6).

7. The heating boiler with built-in pipes according to claim 1, characterized in that, The shortest distance d1 between the pipe joint (402) and the heating component (3) is less than the shortest distance d2 between the pipe inlet (401) and the heating component (3).

8. The heating boiler with built-in pipes according to claim 3, characterized in that, The first pipe (7) is installed at one end near the pipe inlet (401) into the mounting groove (105) on the inner wall of the boiler (1).

9. The heating boiler with built-in pipes according to claim 1, characterized in that, The lower end of the boiler (1) is equipped with a water inlet (5).

10. A coffee machine, characterized in that: Including a heating boiler with built-in pipes as described in any one of claims 1-9.

Images