A boiler and coffee machine with built-in ducts

Abstract

The application discloses a boiler with a built-in pipeline and a coffee machine, and relates to the technical field of coffee machines. The boiler with the built-in pipeline comprises a first furnace body, a second furnace body and an extraction supply pipeline. The first furnace body is internally provided with a heating device and externally provided with a water supply joint. The second furnace body is connected to one end of the first furnace body, and internally forms a first cavity and a second cavity. A brewing and extraction head is installed at the bottom of the second cavity, so that the extraction cavity is located below the heated water cavity. The extraction supply pipeline is composed of a first supply pipeline, a control valve and a second supply pipeline. The first supply pipeline and the second supply pipeline are both arranged inside the second furnace body, and the heated water cavity continuously keeps them warm. The control valve is arranged on the outer wall of the furnace body, and the water flow can be conveniently adjusted. According to the application, the water supply pipeline is arranged inside the heating cavity, so that the heat loss is significantly reduced, the stability of hot water is improved, the temperature of the hot water entering the extraction cavity is closer to the actual temperature of the hot water in the furnace body, and the quality and consistency of coffee extraction are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coffee machines, in particular to a boiler with built-in pipeline and a coffee machine. BACKGROUND

[0002] The existing coffee machine extraction scheme is to complete coffee liquid extraction by supplying water from the boiler to the brewing head through an external metal pipe, and connecting a control valve to the metal pipe to allow users to adjust the flow. Since the external metal pipe and the control valve away from the boiler will dissipate heat, heat will be dissipated during the process of supplying water from the boiler to the brewing head, resulting in a temperature difference of 5-6℃ between the water temperature in the brewing head extraction chamber and the water temperature in the boiler. Coffee machines have very high requirements for extraction temperature, and a deviation of 0.5℃ can greatly affect coffee extraction. The external metal pipe and the control valve away from the boiler will dissipate heat, resulting in a large difference between the water temperature reaching the extraction chamber and the water temperature in the boiler, which greatly affects extraction. SUMMARY

[0003] The purpose of the present application is to provide a boiler with built-in pipeline and a coffee machine to solve the above-mentioned problems.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] In a first aspect, the present application provides a boiler with built-in pipeline, comprising:

[0006] A first furnace body, which is internally provided with a heating device and externally connected with a water supply connector;

[0007] A second furnace body, which is installed at one end of the first furnace body, and is internally provided with a first cavity and a second cavity connected with the first furnace body, and is provided at the other end of the second furnace body and at the bottom of the second cavity with a brewing extraction head, so that the extraction cavity passage of the brewing extraction head is located below the second cavity;

[0008] An extraction supply pipeline, which comprises a first supply pipeline, a control valve and a second supply pipeline, wherein:

[0009] The first supply pipeline is arranged in the second furnace body, one end of the first supply pipeline is provided with a water inlet, and the water inlet is installed in the second cavity;

[0010] The control valve is connected with the outer wall of the second furnace body, has a water inlet part and a water outlet part, the water inlet part is connected with the water outlet end of the first supply pipeline, and the water outlet part is connected with the water inlet end of the second supply pipeline;

[0011] The second supply pipeline is arranged in the second furnace body, the water outlet end of the second supply pipeline is connected with the extraction cavity passage, and is used for supplying water to the extraction cavity passage.

[0012] In a possible implementation, the water outlet end of the first supply pipeline and the water inlet of the second supply pipeline are both in the first cavity.

[0013] In a possible implementation, the end on one side of the water inlet end of the first supply pipeline is installed into the mounting groove on the inner wall of the second furnace body.

[0014] In a possible implementation, the second supply pipeline is arranged in an inclined manner, specifically, the height A at the water outlet end of the second supply pipeline is greater than the height B at the water inlet end of the second supply pipeline.

[0015] In a possible implementation, the control valve comprises a valve base one, a valve base two, a valve base three and a solenoid valve.

[0016] The valve base one is integrally formed with the outer wall of the first cavity; the valve base two is connected to one side of the valve base one and integrally formed with the outer wall of the valve base one; the valve base three is arranged on one side of the valve base two and integrally formed with the outer wall of the first cavity.

[0017] The first channel is formed in the valve base one and communicates with the water outlet end of the first supply pipeline through the wall of the second furnace body.

[0018] The second channel is formed in the valve base two and the water outlet nozzle is arranged on the outside of the valve base two, one end of the second channel communicates with the water outlet end of the first channel and the other end communicates with the water outlet nozzle.

[0019] The third channel is formed in the valve base three and the water inlet nozzle is arranged on the outside of the valve base three, one end of the third channel communicates with the water inlet nozzle and the other end communicates with the water inlet end of the second supply pipeline.

[0020] The solenoid valve is installed on the water outlet nozzle and the water inlet nozzle and used to control the opening and closing of the water supply source.

[0021] In a possible implementation, the valve core is further arranged in the valve base one, the valve core is inserted into the first channel to block the bottom end of the first channel, the other end of the valve core protruding out of the valve base one forms an adjusting end, the adjusting end is used to control the movement of the valve core in the axial direction of the first channel, so that the flow space between the first channel and the second channel is adjusted.

[0022] In a possible implementation, the valve base four is integrally connected to the other side of the valve base one, the fourth channel is formed in the valve base four, one end of the fourth channel communicates with the first channel and the pressure sensor is installed on the other end of the fourth channel.

[0023] In a possible implementation, the first channel has a first part channel and a second part channel arranged in sequence, and the diameter of the second part channel is smaller than that of the first part channel.

[0024] The valve core has a conical surface section and a blocking outer edge, the conical surface section is connected with the blocking outer edge and the diameter of the connection is larger than that of the second part channel, the conical surface section is arranged in the second part channel, and the blocking outer edge abuts against the end of the second part channel.

[0025] In a possible implementation, the power connection end of the heating device is connected with the side wall of the first furnace body, and the heating device extends from the first furnace body into the second cavity.

[0026] In a possible implementation, the water supply connector is installed at the bottom of the first furnace body.

[0027] In a second aspect, the application further provides a coffee machine, which comprises the built-in-pipe boiler provided in the first aspect.

[0028] In summary, due to the adoption of the above technical solutions, the application has the following beneficial effects:

[0029] In the application, the first supply pipe and the second supply pipe are arranged inside the second furnace body, the control valve is arranged on the outer wall of the second furnace body, and the first supply pipe and the second supply pipe are both arranged in the heating water cavity composed of the first cavity and the second cavity, so that the heat loss caused by the heat dissipation of the external metal pipe and the control valve far away from the boiler in the prior art is avoided. The structure can significantly reduce the water temperature difference between the boiler and the extraction cavity in the brewing extraction head, the hot water in the first supply pipe is continuously heated and compensated by the cavity hot water during the process of entering the second supply pipe, the temperature of the hot water entering the extraction cavity is closer to the temperature of the hot water in the furnace body, and thus the quality of coffee extraction is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 FIG. 1 is a perspective view of the application;

[0031] Figure 2 FIG. 2 is a transverse sectional view of the application;

[0032] Figure 3 FIG. 3 is a sectional view of the brewing extraction head in the application;

[0033] Figure 4 FIG. 4 is another perspective view of the application;

[0034] Figure 5 FIG. 5 is a sectional view of the control valve in the application;

[0035] Figure 6 This is a second cross-sectional view of the control valve in this invention;

[0036] Figure 7 For the present invention Figure 6 An enlarged schematic diagram of point A in the middle;

[0037] Figure 8 This is a schematic diagram of the third channel in this invention.

[0038] Marked in the image:

[0039] 1. First furnace body; 101. Heating device; 102. Water supply connector;

[0040] 2. Second furnace body; 201. First cavity; 202. Second cavity; 203. Mounting groove;

[0041] 3. Brewing and extraction head; 301. Extraction chamber channel;

[0042] 4. Extraction supply pipeline;

[0043] 401, First supply pipeline; 4011, Water inlet;

[0044] 402. Control valve; 4021. Valve base one; 4022. Valve base two; 4023. Valve base three; 4024. Solenoid valve; 4025. Valve base four;

[0045] 403. Second supply pipeline;

[0046] 5. First channel; 501. First section of channel; 502. Second section of channel;

[0047] 6. Second channel; 601. Water outlet;

[0048] 7. Third channel; 701. Water inlet;

[0049] 8. Valve core;

[0050] 9. Adjustment end;

[0051] 10. Conical section;

[0052] 11. Seal off the outer edge;

[0053] 12. Fourth Channel;

[0054] 13. Pressure sensor;

[0055] 14. Temperature sensor. Detailed Implementation

[0056] 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.

[0057] First, use Figure 1 The overall structure of this type of boiler with built-in pipes will be described. Figure 1 This is one of the three-dimensional schematic diagrams of the present invention.

[0058] For details, please refer to Figures 1-3 , Figure 1 This is one of the three-dimensional schematic diagrams of the present invention. Figure 2 This is a cross-sectional view of the present invention. Figure 3 This is a cross-sectional view of the boiling extraction head 3 in this invention. The boiler with built-in piping includes a first furnace body 1, a second furnace body 2, and an extraction supply pipeline 4, wherein:

[0059] The first furnace body 1 is equipped with a heating device 101 inside, and a water supply connector 102 is connected to the outside of the first furnace body 1. The water supply connector 102 can supply cold water to the inside of the first furnace body 1, and the heating device 101 can heat the cold water.

[0060] The second furnace body 2 is installed at one end of the first furnace body 1. The second furnace body 2 has a first cavity 201 and a second cavity 202 connecting the first furnace body 1. The other end of the second furnace body 2, located at the bottom of the second cavity 202, is equipped with a brewing extraction head 3, with its extraction chamber channel 301 located below the second cavity 202. By configuring the interior of the second furnace body 2 to connect the first cavity 201 and the second cavity 202, with the first cavity 201 connected to the first furnace body 1 and the extraction chamber channel 301 of the brewing extraction head 3 connected below the second cavity 202 for coffee extraction, the first cavity 201 and the second cavity 202 are also expanded into a water storage chamber for the first furnace body 1, thereby increasing the water capacity of the first furnace body 1.

[0061] The extraction supply pipeline 4 may include a first supply pipeline 401, a control valve 402, and a second supply pipeline 403, wherein the first supply pipeline 401 and the second supply pipeline 403 are both disposed inside the second furnace body 2; and the control valve 402 may be connected to the outer wall of the second furnace body 2.

[0062] Regarding the specific structure of the first supply pipe 401, the control valve 402, and the second supply pipe 403:

[0063] One end of the first supply pipe 401 is provided with a water inlet 4011, and the water inlet 4011 can be installed in the second cavity 202. Hot water in the second cavity 202 can enter the first supply pipe 401 through the water inlet 4011.

[0064] The control valve 402 has an inlet section and an outlet section. The inlet section is connected to the outlet end of the first supply pipe 401, and the outlet section is connected to the inlet end of the second supply pipe 403.

[0065] The outlet of the second supply pipe 403 is connected to the extraction chamber channel 301. That is, hot water entering the first supply pipe 401 through the inlet 4011 can enter through the inlet part of the control valve 402, flow out through the outlet part, and finally flow into the second supply pipe 403. The hot water flowing from the second supply pipe 403 into the extraction chamber channel 301 can supply water to the inside of the extraction chamber channel 301 to complete the extraction of coffee.

[0066] The first furnace body 1 is cylindrical, and the second furnace body 2 is connected to the side wall of the first furnace body 1. Temperature sensors 14 are also connected to the first furnace body 1 and the second furnace body 2 to monitor the temperature of the hot water inside the boiler.

[0067] Working principle:

[0068] When the operator uses a coffee machine with a boiler containing built-in pipes, the boiler is filled with cold water. When the operator turns on the coffee machine, the boiler begins to heat up. When the temperature sensor 14 detects that the water in the boiler has reached the preset temperature, the controller sends a feedback, the boiler stops heating, and a notification is displayed to the operator via an external display device. When the operator presses the extraction button, the rotary pump inside the coffee machine supplies cold water to the first boiler body 1 through the water supply connector 102. Since the boiler chamber with built-in pipes is sealed, the newly injected cold water forces the original hot water in the boiler to move to the second chamber 202. This causes the original hot water in the second chamber 202 to flow into the first supply pipe 401 through the inlet 4011 and then into the second supply pipe 403 through the control valve 402. Finally, water is injected into the extraction chamber channel 301 of the brewing extraction head 3 to extract the coffee powder.

[0069] During this process, since the amount of hot water required to extract a single cup of coffee is 40 to 50 ml, and the amount required to extract two cups of coffee is about 80 to 100 ml, the amount of water is small. Therefore, the cold water entering the first boiler body 1 is heated by the existing hot water in the boiler before it reaches the second chamber 202. Because the chambers in the first boiler body 1 and the second boiler body 2 are connected, the water capacity of the first boiler body 1 is actually expanded, allowing the first boiler body 1 to hold a larger volume of water. Since the larger volume of water has the characteristic of slow heat dissipation, after being heated to the designated temperature, cold water is injected into the larger volume of water. The temperature change of the larger volume of water is relatively slower than that of the smaller volume of water. Because the second chamber 202 is located above the extraction chamber channel 301 of the brewing extraction head 3, the water in the first boiler body 1 transfers its heat to the brewing extraction head 3 at the same time when it is heated, giving the brewing extraction head 3 a certain temperature. When the hot water enters the extraction chamber channel 301 of the brewing extraction head 3, the temperature difference between the hot water and the hot water in the second chamber 202 is small, making the coffee machine more stable in continuous cup production.

[0070] Since the first supply pipe 401 and the second supply pipe 403 are also located within the cavity of the second furnace body 2 and are surrounded by hot water within the cavity, the hot water entering the control valve 402 from the inlet 4011 of the first supply pipe 401 loses a certain amount of heat and returns to the second cavity 202 via the second supply pipe 403 and is injected into the extraction chamber channel 301. When the hot water flows back to the second supply pipe 403, it is surrounded by water within the cavity of the second furnace body 2. The hot water within the cavity of the second furnace body 2 transfers heat to the interior of the second supply pipe 403 through the second supply pipe 403, causing the water inside the second supply pipe 403 to reheat. This makes the temperature of the hot water entering the extraction chamber channel 301 close to the temperature of the hot water in the second cavity 202, reducing the temperature difference between the hot water entering the extraction chamber channel 301 and the hot water in the second cavity 202.

[0071] When the user finishes coffee extraction, the rotary pump stops working and no longer injects new cold water. The hot water in the chambers of the first furnace body 1 and the second furnace body 2 stops flowing and slowly dissipates heat.

[0072] When the water temperature in the first furnace body 1 drops below the set temperature, the first furnace body 1 will be reheated. During the reheating process, the relatively hot water will separate from the relatively cool water, and the relatively hot water will rise to the upper layer until the temperature of all the water in the cavity is uniform.

[0073] In this embodiment, by providing the second furnace body 2 with a first cavity 201 and a second cavity 202 connected together, the first cavity 201 being connected to the first furnace body 1, and the extraction chamber channel 301 of the brewing extraction head 3 connected below the second cavity 202 for extracting coffee, the first cavity 201 and the second cavity 202 are also extended into a water storage chamber of the first furnace body 1, which increases the water capacity of the first furnace body 1. On the other hand, since the second cavity 202 is located above the extraction chamber channel 301, when the first furnace body 1 is heated, the water in the second cavity 202 will transfer heat to the extraction chamber channel 301, increasing the temperature of the extraction chamber channel 301. This reduces the amount of heat transferred from the hot water entering the extraction chamber channel 301, thus reducing heat loss.

[0074] The outlet of the first supply pipe 401 and the inlet of the second supply pipe 403 are both inside the first cavity 201. The inlet 4011 of the first supply pipe 401 and the outlet of the second supply pipe 403 are located inside the second cavity 202. The outlet of the first supply pipe 401 and the inlet of the second supply pipe 403 are connected by a control valve 402, so that the first supply pipe 401 and the second supply pipe 403 are enclosed by the cavity inside the second furnace body 2. That is, when the first furnace body 1 is heating, the first supply pipe 401 and the second supply pipe 403 will be enclosed by hot water. Therefore, even if the water entering the first supply pipe 401 from the inlet 4011 of the first supply pipe 401 loses heat after passing through the control valve 402, it can be reheated by the hot water in the cavity of the second furnace body 2 when it enters the second supply pipe 403, so that the temperature difference between the hot water entering the extraction chamber channel 301 and the hot water in the boiler is small.

[0075] The water supply pipe for the extraction chamber channel 301 of the brewing extraction head 3 is located in the cavity of the second furnace body 2 and the second furnace body 2 is connected to the first furnace body 1. There is no need to place the water supply pipe outside, which can avoid damage to the inside of the coffee machine caused by water leakage from broken water supply pipe.

[0076] On the other hand, the control valve 402 is connected to the outer wall of the first cavity 201 and the control valve 402 is pressed tightly against the outer wall of the first cavity 201. Then, the outlet of the first supply pipe 401 and the inlet of the second supply pipe 403 are connected to the control valve 402, so that the first supply pipe 401 and the second supply pipe 403 both span the first cavity 201 and the second cavity 202. This makes it convenient for hot water to have sufficient flow distance in the second supply pipe 403 after entering the first supply pipe 401 from the inlet 4011 and flowing through the control valve 402 into the second supply pipe 403. This allows the water in the second supply pipe 403 to have enough time to be reheated by the hot water in the first cavity 201 and the second cavity 202, thereby reducing the temperature difference between the hot water entering the extraction chamber channel 301 and the hot water in the first furnace body 1. Furthermore, by placing the control valve 402 close to the outer wall of the second furnace body 2, the distance between the first supply pipe 401 and the second supply pipe 403 and the control valve 402 can be minimized. Therefore, placing the control valve 402 close to the outer wall of the second furnace body 2 can minimize heat loss.

[0077] In some embodiments, such as Figure 2 As shown. Figure 2 This is a cross-sectional view of the present invention. The end of the first supply pipe 401 on the water inlet side is installed into the mounting groove 203 on the inner wall of the second furnace body 2. At this time, the water inlet 4011 is located in the second cavity 202, and the water outlet of the first supply pipe 401 and the water inlet of the second supply pipe 403 are both in the first cavity 201.

[0078] In this embodiment, since the outlet of the first supply pipe 401 and the inlet of the second supply pipe 403 are connected to the control valve 402, the hot water will lose heat when passing through the control valve 402. Since the distance between the first cavity 201 and the first furnace body 1 is the shortest, setting the outlet of the first supply pipe 401 and the inlet of the second supply pipe 403 in the first cavity 201 can make the temperature of the water at the outlet of the first supply pipe 401 closer to the temperature of the water in the first furnace body 1. After the water passes through the control valve 402 and enters the second supply pipe 403, it also has enough distance to heat up during the process of passing through the extraction chamber channel 301, so that the temperature of the water entering the extraction chamber channel 301 is closer to the temperature of the water in the first furnace body 1.

[0079] In some embodiments, such as Figure 2 As shown. Figure 2 This is a cross-sectional view of the present invention. The second supply pipe 403 is inclined, specifically, the height A at the outlet end of the second supply pipe 403 is greater than the height B at the inlet end of the second supply pipe 403.

[0080] In this embodiment, since hot and cold water will separate into layers in the same container during heating, with the relatively hot water on the upper layer, setting the first supply pipe 401 above the second supply pipe 403 ensures that when the water temperature in the first furnace body 1 drops, the hot water entering through the inlet 4011 of the first supply pipe 401 will also be at a relatively higher temperature. The hot water flowing into the second supply pipe 403 through the control valve 402 will lose heat. The height A (high point position) of the outlet end of the second supply pipe 403 is only slightly lower than that of the first supply pipe 401. This setting allows the outlet end of the second supply pipe 403 to be located in the hot layer area, so that when the hot water enters the extraction chamber channel 301 of the boiling extraction head 3, the temperature difference between the hot water and the hot water in the hot layer of the second chamber 202 is small, providing precise temperature control.

[0081] In some embodiments, such as Figure 4 , Figure 5 , Figure 6 as well as Figure 8 As shown. Figure 4 This is a second three-dimensional schematic diagram of the present invention. Figure 5 This is one of the cross-sectional views of the control valve 402 in this invention. Figure 6 This is a second cross-sectional view of the control valve 402 in this invention. Figure 8 This is a schematic diagram of the third channel 7 in this invention. Regarding the specific structure of the control valve 402: The control valve 402 includes a valve base 1 4021, a valve base 2 4022, a valve base 3 4023, and a solenoid valve 4024.

[0082] Valve base 1 4021 is integrally formed with the outer wall of the first cavity 201; valve base 2 4022 is connected to one side of valve base 1 4021 and is integrally formed with the outer wall of valve base 1 4021; valve base 3 4023 is disposed on one side of valve base 2 4022 and is integrally formed with the outer wall of the first cavity 201.

[0083] The valve base 4021 has a first channel 5 inside. The first channel 5 passes through the wall of the second furnace body 2 and is connected to the water outlet of the first supply pipe 401, so that the hot water in the first supply pipe 401 can flow into the interior of the first channel 5.

[0084] The valve base 4022 has a second channel 6 inside and a water outlet 601 outside. One end of the second channel 6 is connected to the water outlet of the first channel 5 and the other end of the second channel 6 is connected to the water outlet 601. Hot water in the first supply pipe 401 can flow to the water outlet 601 through the first channel 5 and the second channel 6.

[0085] The valve base 4023 has a third channel 7 inside, and a water inlet 701 is provided on the outside of the valve base 4023. One end of the third channel 7 is connected to the water inlet 701, and the other end is connected to the water inlet of the second supply pipe 403. A solenoid valve 4024 is installed on the water outlet 601 and the water inlet 701. That is, hot water in the first supply pipe 401 can flow through the first channel 5, the second channel 6, the water outlet 601, the solenoid valve 4024, the water inlet 701, and the third channel 7 to the second supply pipe 403. The hot water flowing from the second supply pipe 403 to the extraction chamber channel 301 can supply water to the inside of the extraction chamber channel 301 to complete the coffee extraction. The solenoid valve 4024 has a three-way structure and a pressure relief port, which can be used to control the on / off switching of the water supply and to relieve pressure. In addition, during the pressure relief process, the solenoid valve 4024 is inclined through the second supply pipe 403. The height difference in the structure helps the residual water to be discharged downward along the water path under the action of gravity after extraction, reducing water retention, preventing residual water from flowing back to the boiler, avoiding water pollution caused by boiler water backflow, improving water path hygiene, and avoiding problems such as scale buildup inside the equipment and pipeline pollution.

[0086] In this embodiment, valve base 1 4021, valve base 2 4022, and valve base 3 4023 are all installed on the wall of the second furnace body 2, which can minimize heat loss.

[0087] In some embodiments, such as Figures 5-6 As shown. Figure 5 This is one of the cross-sectional views of the control valve 402 in this invention. Figure 6 This is a second cross-sectional view of the control valve 402 in this invention. To enable the control valve 402 to perform flow control, a valve core 8 is also provided inside the valve base 4021. The valve core 8 is inserted into the first channel 5 to block the bottom end of the first channel 5. The other end of the valve core 8, away from the first channel 5, protrudes from the valve base 4021 to form an adjusting end 9. The adjusting end 9 is used to control the axial movement of the valve core 8 in the first channel 5, thereby adjusting the flow space between the first channel 5 and the second channel 6.

[0088] In some embodiments, such as Figure 7 As shown. Figure 7 For the present invention Figure 6The enlarged schematic diagram at point A shows the specific structure between the valve core 8 and the first channel 5 to achieve a sealing effect. The first channel 5 has a first part channel 501 and a second part channel 502 arranged vertically. The diameter of the second part channel 502 is smaller than the diameter of the first part channel 501. The valve core 8 has a conical section 10 and a sealing outer edge 11. The conical section 10 is connected to the sealing outer edge 11, and the diameter of the connection point is larger than the diameter of the second part channel 502. The conical section 10 is placed inside the second part channel 502, and the sealing outer edge 11 abuts against the end of the second part channel 502.

[0089] In some embodiments, such as Figure 5 As shown. Figure 5 This is one of the cross-sectional views of the control valve 402 in this invention. A fourth valve base 4025 is integrally connected to the other side of the valve base 4021. A fourth channel 12 is provided inside the fourth valve base 4025. One end of the fourth channel 12 is connected to the first channel 5, and a pressure sensor 13 is installed at the other end of the fourth channel 12. In this embodiment, the pressure sensor 13 can detect the pressure of the hot water used for coffee extraction, thereby facilitating pressure regulation during coffee extraction. A temperature sensor 14 is connected to one side of the pressure sensor 13 to monitor the temperature of the hot water in the boiler.

[0090] In some embodiments, such as Figure 2 As shown. Figure 2 This is a cross-sectional view of the present invention. The inlet 4011 is located on the wall of the first supply pipe 401. Specifically, the inlet 4011 is arranged in a ring around the axis of the first supply pipe 401, making it vertical. This allows for a more uniform flow rate and temperature of the hot water entering the first supply pipe 401. It is important to understand that as the water temperature inside the first furnace body 1 decreases, the boiler needs to reheat. At this time, the hot and cold water will separate, with the hot water at the upper level. By vertically positioning the outlet on the wall of the first supply pipe 401, the water being heated enters from the lower level, while the relatively warmer water enters from the upper level of the inlet 4011. This stabilizes the temperature of the water ultimately entering the extraction chamber channel 301, reducing the temperature difference between the water entering the extraction chamber channel 301 and the water inside the boiler.

[0091] In some embodiments, such as Figure 2 As shown. Figure 2This is a cross-sectional view of the present invention. The water supply connector 102 is installed at the bottom of the first boiler body 1. Since the coffee machine supplies cold water to the boiler via an external rotary pump during extraction, the newly entering cold water forces the hot water in the second chamber 202 into the first supply pipe 401. Therefore, placing the water supply connector 102 at the bottom of the first boiler body 1 allows the water supply connector 102 to be at a greater distance from the water inlet 4011 of the first supply pipe 401, without affecting the temperature of the water entering the water inlet 4011 of the first supply pipe 401. This ensures that the temperature of the water flowing through the first supply pipe 401 into the extraction chamber channel 301 is close to the temperature of the water in the second chamber 202.

[0092] In some embodiments, such as Figure 2 As shown. Figure 2 This is a cross-sectional view of the present invention. To ensure more uniform and faster heating of the water within the first furnace body 1, the first cavity 201, and the second cavity 202, the electrical terminal of the heating device 101 is connected to the side wall of the first furnace body 1, and the heating device 101 extends from the first furnace body 1 into the second cavity 202. In this embodiment, the heating device 101 is elongated, and one end of the heating device 101 placed inside the second cavity 202 is located near the inlet 4011 of the first supply pipe 401.

[0093] On the other hand, this invention also provides a coffee machine comprising a boiler with built-in piping as described in one or more of the above optional embodiments. A brewing / extraction head 3 is connected below the second boiler body 2 of the boiler with built-in piping. The brewing / extraction head 3 is located outside the coffee machine, while the boiler with built-in piping is placed inside the coffee machine. The second boiler body 2 is placed horizontally inside the coffee machine, and the extraction chamber channel 301 of the brewing / extraction head 3 is located below the second chamber body 202. Because of the use of the boiler with built-in piping provided by this invention, the coffee machine provided by this invention possesses all the beneficial effects of the boiler with built-in piping provided by this invention.

[0094] 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.

[0095] In the description of this invention, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a 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.

[0096] Furthermore, in the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "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 invention 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 invention.

[0097] On the other hand, it should be noted that, unless otherwise explicitly specified and limited, the terms "located at," "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A boiler with built-in ducts, characterized in that, The utility model relates to a kind of tea making machines, including: First furnace body (1), inside being equipped with heating device (101), outside being connected with water supply joint (102); Second furnace body (2), is installed to one end of the first furnace body (1), the first cavity (201) and second cavity (202) being connected in the second furnace body (2) are equipped with the first cavity (201) of the first furnace body (1), the other end of second furnace body (2) and located at the bottom of the second cavity (202) is equipped with brewing extraction head (3), so that the extraction cavity passageway (301) of brewing extraction head (3) is located below the second cavity (202); Extraction supply line (4), including first supply pipeline (401), control valve (402) and second supply pipeline (403), wherein: First supply pipeline (401), be equipped in the second furnace body (2), one end of the first supply pipeline (401) is equipped with water inlet (4011) and the water inlet (4011) is installed in the second cavity (202); Control valve (402), with the outer wall of the second furnace body (2) is connected, has water inlet part and water outlet part, the water inlet part connects the water outlet end of the first supply pipeline (401), the water outlet part connects the water inlet end of the second supply pipeline (403); Second supply pipeline (403), be equipped in the second furnace body (2), the water outlet end of the second supply pipeline (403) is connected with extraction cavity passageway (301), for the water supply of extraction cavity passageway (301).

2. A boiler with a built-in duct according to claim 1, characterized in that The water outlet end of the first supply pipeline (401) and the water inlet of the second supply pipeline (403) are all in the first cavity (201).

3. The boiler with a built-in duct according to claim 1, characterized in that The end of the water inlet end side of the first supply pipeline (401) is installed in the mounting groove (203) on the inner wall of the second furnace body (2).

4. The boiler with a built-in duct according to claim 1, characterized in that The second supply pipeline (403) is inclined, specifically, the height A of the water outlet end of the second supply pipeline (403) is greater than the height B of the water inlet end of the second supply pipeline (403).

5. A boiler with an internal duct according to any one of claims 1-4, characterized in that The control valve (402) includes valve base one (4021), valve base two (4022), valve base three (4023) and solenoid valve (4024); The valve base one (4021) is integrally formed with the outer wall of the first cavity (201);The valve base two (4022) is connected to one side of the valve base one (4021) and integrally formed with the outer wall of the valve base one (4021);The valve base three (4023) is arranged on one side of the valve base two (4022) and integrally formed with the outer wall of the first cavity (201); The first channel (5) is arranged in the valve base one (4021), and the first channel (5) penetrates the wall of the second furnace body (2) and communicates with the water outlet end of the first supply pipeline (401); The second channel (6) is arranged in the valve base two (4022), and the water outlet nozzle (601) is arranged outside the valve base two (4022), one end of the second channel (6) communicates with the water outlet end of the first channel (5), and the other end of the second channel (6) communicates with the water outlet nozzle (601). The third channel (7) of the valve base three (4023) is communicated to the water inlet nozzle (701) at one end and the water inlet end of the second supply pipeline (403) at the other end. The electromagnetic valve (4024) is installed on the water outlet nozzle (601) and the water inlet nozzle (701) to control the switch of the water supply source.

6. A boiler with a built-in duct according to claim 5, characterized in that The valve base one (4021) is further provided with a valve core (8) which is inserted into the first channel (5) to block the bottom end of the first channel (5), and the other end of the valve core (8) away from the first channel (5) protrudes out of the valve base one (4021) to form an adjusting end (9) for controlling the axial movement of the valve core (8) in the first channel (5) to adjust the flow space between the first channel (5) and the second channel (6).

7. A boiler with a built-in duct according to claim 6, characterized in that The first channel (5) has a first partial channel (501) and a second partial channel (502) arranged in an up-down manner, and the diameter of the second partial channel (502) is smaller than that of the first partial channel (501). The valve core (8) has a tapered section (10) and a blocking outer edge (11), the tapered section (10) is connected with the blocking outer edge (11) and the diameter of the connection part is larger than that of the second partial channel (502), the tapered section (10) is arranged in the second partial channel (502), and the blocking outer edge (11) abuts against the end of the second partial channel (502).

8. A boiler with a built-in duct according to claim 5, characterized in that The other side of the valve base one (4021) is integrally connected with a valve base four (4025), the valve base four (4025) is provided with a fourth channel (12) therein, one end of the fourth channel (12) is communicated to the first channel (5), and the other end is provided with a pressure sensor (13).

9. The boiler with a built-in duct according to claim 1, characterized in that The water supply joint (102) is installed at the bottom of the first furnace body (1).

10. A coffee maker characterized in that, A boiler comprising the built-in pipeline according to any one of claims 1-9. A boiler comprising the built-in pipeline according to any one of claims 1-9.

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