Coffee machine

Abstract

The utility model discloses a coffee machine which comprises a first water tank, a brewing module, a pipeline, a heating piece, a second water tank and a pump body, and the first water tank is provided with a water tank water outlet; the pipeline is communicated with the water outlet of the water tank and the brewing module; the heating piece is arranged on the pipeline; the second water tank is arranged on the pipeline and located between the heating piece and the brewing module. The pump body is connected with the second water tank and used for pumping liquid in the second water tank to the brewing module. According to the technical scheme, water outlet control of the coffee machine can be simplified, and meanwhile the water outlet temperature and the water outlet duration are guaranteed.

Description

Technical Field

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

[0002] With the improvement of people's living standards and the acceleration of the pace of life, people have shorter waiting times for the preparation of coffee, beverages, etc., and a simple and quick preparation process is more in line with people's current fast-paced lifestyle.

[0003] In the currently used coffee machine, the water tank is placed on the upper part of the whole machine, and the heating device is directly below the water tank. When working, the whole water is heated to the required temperature, and the hot water is passed into the coffee basket for extraction once to achieve coffee brewing. Due to the limitations of the above brewing structure, the overall water heating time is too long, the water outlet temperature is too high, and a more complicated control program or structure is required. Utility Model Content

[0004] The main purpose of the utility model is to provide a coffee machine, aiming to simplify the water outlet control of the coffee machine while ensuring the water outlet temperature and water outlet time.

[0005] To achieve the above object, the coffee machine proposed by the utility model comprises:

[0006] The first water tank is provided with a water tank outlet;

[0007] A brewing module and a pipeline, wherein the pipeline is connected between the water outlet of the water tank and the brewing module;

[0008] A heating element, arranged on the pipeline;

[0009] a second water tank, disposed in the pipeline and located between the heating element and the brewing module; and

[0010] The pump body is connected to the second water tank and is used to pump the liquid in the second water tank into the brewing module.

[0011] Optionally, the coffee machine further comprises a temperature sensor linked to the pump body, wherein the temperature sensor is used to detect the temperature of the liquid in the second water tank.

[0012] Optionally, the coffee machine further comprises a time controller linked to the pump body, wherein the time controller is used to obtain the heating time of the heating element.

[0013] Optionally, the second water tank is provided with a hot water inlet and a hot water outlet, the hot water inlet is arranged at the top of the second water tank, and the hot water outlet is connected to the pump body.

[0014] Optionally, the coffee machine also includes a liquid level stabilization module, which includes a shell and a float, the shell is provided with a water inlet connected to the water outlet of the water tank, and is provided with a first outlet and a second outlet, the first outlet is connected to the pipeline, and the second outlet is connected to the atmosphere, and the float is used to open or close the water inlet.

[0015] Optionally, the pipeline has a water inlet connection end connected to the hot water inlet, and after the float seals the water inlet, the distance between the liquid level in the shell and the water inlet connection end is H, 10mm≤H≤15mm.

[0016] Optionally, the coffee machine further comprises a water shortage detection device, and the water shortage detection device is arranged in the first water tank and / or the liquid level stabilization module;

[0017] And / or, the power P of the heating element satisfies: 1300W≤P≤1600W.

[0018] Optionally, the second water tank is provided with an exhaust hole, and the exhaust hole is used to balance the air pressure in the second water tank.

[0019] Optionally, the coffee machine further comprises a one-way valve, wherein the one-way valve is disposed between the first water tank and the heating element, and a conducting direction of the one-way valve is configured to be a direction from the first water tank toward the pipeline.

[0020] Optionally, the pipeline has a pipeline portion in which the internal liquid flows upward, and the heating element is at least arranged on the pipeline portion;

[0021] The heating element is arranged in an L shape.

[0022] In the technical solution of the utility model, a second water tank and a pump body are arranged between the heating element and the brewing module. At this time, the second water tank serves as a transfer station, and the pump body provides power for extracting water in the second water tank to the brewing module. On the one hand, compared with the water outlet directly flowing to the brewing module, the height difference that the hot water needs to overcome becomes smaller, and the required pressure will also be reduced. On the other hand, it can store heated water, effectively limit the hot water flowing to the brewing module from falling back into the pipe corresponding to the heating element, reduce the possibility of excessive water temperature, increased water vapor, and reduced water volume due to repetitive heating, and ensure the water outlet temperature and water volume; and, in conjunction with the controlled operation of the pump body, the water outlet time, water outlet temperature and water outlet volume can be further reasonably controlled according to demand, so that it meets the requirements of ECBC (European Coffee Brewing Center) on brewing temperature and extraction time, which is helpful to create high-standard and high-specification coffee machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the coffee machine of the present utility model.

[0025] Description of Figure Numbers:

[0026] Label name Label name 10 Water tank module 413 The third pipe section 11 First water tank 414 Water inlet connection 20 Liquid level stabilization module 42 Heating element 21 case 421 The first heating element 22 Float 422 The second heating element 30 Brewing module 50 Second water tank 31 Powder silo 51 Hot water inlet 32 Water vapor separation device 52 Hot water outlet 40 Heating module 60 Pump body 41 pipeline 70 Check valve 411 First pipe section 80 Wetted Module 412 Second pipe section 90 Insulation module

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] The utility model provides a coffee machine.

[0033] Reference Figure 1 In an embodiment of the utility model, the coffee machine includes a first water tank 11, a liquid level stabilization module 20, a brewing module 30, a pipeline 41, a heating element 42, a second water tank 50 and a pump body 60. The first water tank 11 is provided with a water tank outlet; the pipeline 41 connects the water tank outlet and the brewing module 30; the heating element 42 is arranged in the pipeline 41; the second water tank 50 is arranged in the pipeline 41 and is located between the heating element 42 and the brewing module 30; the pump body 60 is connected to the second water tank 50 and is used to extract the liquid in the second water tank 50 to the brewing module 30. In this way, the water outlet control of the coffee machine is simplified, while ensuring the water outlet temperature and water outlet time.

[0034] The coffee machine includes a water tank module 10, a heating module 40, a brewing module 30, a liquid receiving module 80 and a heat preservation module 90 to achieve coffee brewing. Of course, in order to improve the safety of the coffee machine and the coffee brewing quality, the coffee machine may further include a liquid level stabilizing module 20. Taking the coffee machine provided with the liquid level stabilizing module 20 as an example, the liquid level stabilizing module 20 is connected between the water tank module 10 and the heating module 40, so that the liquid level stabilizing module 20 is provided between the first water tank 11 and the pipeline 41, wherein the liquid level stabilizing module 20 includes a shell 21 and a float 22, the shell 21 is provided with a water inlet connected to the water outlet of the water tank, the water inlet and the water outlet of the water tank are the same water outlet, or the water inlet and the water outlet of the water tank are connected through a water receiving pipe, that is, the first water tank 11 is connected through the shell 21. 1 and the pipe 41, the shell 21 is also provided with a first outlet and a second outlet, the first outlet is connected to the pipe 41, the second outlet is connected to the atmosphere, and the water inlet is controlled to be opened or closed by the float 22; the brewing module 30 is connected to the heating module 40, that is, the water vapor separation device 32 of the brewing module 30 is connected to the pipe 41, so that the water in the first water tank 11 flows through the shell 21 and the pipe 41, and is sprayed out by the water vapor separation device 32. In this process, the water flow is heated by the heating element 42 to ensure that the hot water flows into the powder bin 31 of the brewing module 30 and mixes with the coffee powder in the powder bin 31; and the brewed coffee flows into the liquid receiving module 80, such as a coffee cup, wherein a heat preservation module 90 is arranged below the liquid receiving module 80 to maintain the temperature of the coffee in the liquid receiving module 80 and ensure the coffee quality.

[0035] Compared with the method of heating the water in the water tank as a whole and then flowing out as a whole, the heating element 42 is arranged in the pipe 41, wherein the heating element 42 can be wrapped on the outer peripheral surface of the pipe 41, and can also be arranged on the inner wall surface of the pipe 41, both of which can make the liquid corresponding to the heating element 42 in the pipe 41 be fully heated. At the same time, the required amount of hot water for brewing is heated to ensure that the required brewing temperature is reached in a shorter heating time, thereby achieving the heating purpose.

[0036] It can be understood that the liquid level stabilization module 20 is connected to the first water tank 11 to ensure that the water in the first water tank 11 can flow into the shell 21, and the pipe 41 is used to connect to the water vapor separation device 32 of the brewing module 30, the water vapor separation device 32 is connected to the atmosphere, and the second outlet is connected to the atmosphere. When the water in the shell 21 flows into the pipe 41 and the water inlet is closed, the liquid level in the pipe 41 and the liquid level in the shell 21 are maintained at the same level, and the level is always higher than the position of the heating tube on the pipe 41, which is beneficial to prevent dry burning.

[0037] Specifically, since a float 22 is provided in the shell 21, and the float 22 is used to open or close the water inlet, the float 22 can be configured as a float valve. As the liquid level in the shell 21 rises and falls, the float 22 can move relative to the shell 21 under the buoyancy of the water, and has a first state of closing the water inlet and a second state of opening the water inlet. Then, according to the brewing demand, the water outflow of the first water tank 11 is controlled by controlling the repeated switching between the first state and the second state, so as to ensure the stable water outflow of the first water tank 11, and ensure that the water inlet is closed. When the water is inlet, the liquid level in the pipe 41 is always maintained at the same horizontal plane as the liquid level in the shell 21, so that the liquid level in the pipe 41 is maintained at an approximately constant position, extending the residence time of the water in the pipe 41, and facilitating the heat emitted by the heating element 42 to fully heat the water flow in the pipe 41 corresponding to the heating element 42, ensuring that the temperature of the water flowing into the powder bin 31 is approximately constant, and the brewed coffee has a better taste. The water temperature can reach between 92°C and 996°C, meeting the ECBC (European Coffee Brewing Center) requirements for brewing temperature.

[0038] After the heating element 42 works for a certain period of time, the water temperature in the pipe 41 reaches a preset temperature. At this time, the water in the pipe 41 is heated to generate pressure and can flow toward the powder bin 31 of the brewing module 30 to achieve coffee brewing. However, regardless of whether the coffee machine is provided with a liquid level stabilizing module 20, when the pipe 41 is too long, i.e., Figure 1 As shown, when the height difference h between the liquid surface in the pipe 41 and the water outlet to the brewing module 30 is too large, the pressure generated is not enough to overcome the height difference and the flow resistance along the way. Part of the heated hot water falls back to the heating module 40 for repeated heating, resulting in overheating of the water temperature, increased water vapor generation, and reduced water flow, thereby extending the water output time, and failing to meet the ECBC (European Coffee Brewing Center) requirements for extraction time (1.25L of water flows out in 6MIN).

[0039] Therefore, the present application sets a second water tank 50 between the heating element 42 and the brewing module 30. At this time, the second water tank 50 serves as a transfer station. On the one hand, compared with the water outlet directly flowing to the brewing module 30, the height difference that the hot water needs to overcome becomes smaller, and the required pressure will also be reduced. On the other hand, it can store heated water and effectively limit the hot water flowing to the brewing module 30 from falling back into the pipe 41 corresponding to the heating element 42, thereby reducing the possibility of excessive water temperature, increased water vapor, and reduced water volume due to repeated heating, thereby ensuring the water outlet temperature and water volume; and Moreover, a pump body 60 is arranged between the second water tank 50 and the brewing module 30. When the pump body 60 is in a shutdown state, it can stop the hot water from flowing to the brewing module 30. When the pump body 60 is controlled to work, at this time, the pump body 60 pumps water from the second water tank 50, which greatly shortens the water output time and ensures the water output temperature and water output volume. Specifically, the cooperation between the second water tank 50 and the pump body 60 enables the coffee machine to reasonably control the water output time, water output temperature and water output volume according to demand, thereby creating a high-standard and high-specification coffee machine. At least one of the controlled conditions can be the water temperature in the second water tank 50, the heating time of the heating element 42, the water output volume of the first water tank 11, etc.

[0040] In addition, before being subjected to pressure, the water flow in the pipe 41 needs to have a certain distance from the water vapor separation device 32 of the brewing module 30 to avoid the distance being too short, resulting in the temperature of the water flow flowing out of the water vapor separation device 32 being too high, thereby affecting the quality of the brewed coffee.

[0041] In the technical solution of the utility model, a second water tank 50 and a pump body 60 are arranged between the heating element 42 and the brewing module 30. At this time, the second water tank 50 serves as a transfer station, and the pump body 60 provides power for extracting water in the second water tank 50 to the brewing module 30. On the one hand, compared with the water outlet directly flowing to the brewing module 30, the height difference that the hot water needs to overcome becomes smaller, and the required pressure will also be reduced. On the other hand, it can store heated water and effectively limit the hot water flowing to the brewing module 30 from falling back into the pipe 41 corresponding to the heating element 42, thereby reducing the possibility of excessive water temperature, increased water vapor, and reduced water volume due to repeated heating, thereby ensuring the water outlet temperature and water volume; and, in conjunction with the controlled operation of the pump body 60, the water outlet time, water outlet temperature and water outlet volume can be further reasonably controlled according to demand, so that it meets the requirements of ECBC (European Coffee Brewing Center) on brewing temperature and extraction time, which is helpful to create a high-standard and high-specification coffee machine.

[0042] Specifically, in one embodiment, the coffee machine further includes a temperature sensor linked to the pump body 60, and the temperature sensor is used to detect the temperature of the liquid in the second water tank 50. It can be understood that a controller is provided in the coffee machine, and the pump body 60, the temperature sensor, the heating element 42, etc. are all electrically connected to the controller. When the temperature sensor detects that the temperature of the liquid in the second water tank 50 reaches a preset temperature, the preset temperature is between 92°C and 996°C, the pump body 60 is controlled to work, and the water in the second water tank 50 flows to the water vapor separation device 32 of the brewing module 30 and is sprayed out by the water vapor separation device 32. In this process, the pump flow rate of the pump body 60 can be pre-set in the controller, so as to facilitate the selection of a suitable pump flow rate according to the brewing requirements. In this way, the water outlet temperature, water outlet flow rate and water outlet time of the coffee machine can be guaranteed, so as to ensure that the brewed coffee tastes better and the waiting time for manufacturing is shorter.

[0043] Specifically, in one embodiment, the coffee machine further includes a time controller linked to the pump body 60, and the time controller is used to obtain the heating time of the heating element 42. It can be understood that a controller is provided in the coffee machine, and the pump body 60, the time controller, the heating element 42, etc. are all electrically connected to the controller. When the heating element 42 starts to work, the time controller synchronizes the timing. After the heating element 42 works for a certain period of time, the time controller obtains the specific working time of the heating element 42 and feeds it back to the controller, so that the controller can control the opening and closing of the pump body 60 according to the specific heating time of the heating element 42, ensuring that the water flow temperature flowing to the brewing module 30 reaches a preset temperature, which is between 92°C and 996°C. In this process, the pump flow of the pump body 60 can be pre-set in the controller, so that it is convenient to select a suitable pump flow according to the brewing requirements. In this way, the water outlet temperature, water outlet flow and water outlet time of the coffee machine can be guaranteed, ensuring that the brewed coffee tastes better and the waiting time is shorter. Of course, in other embodiments, the coffee machine also includes a temperature sensor and a time controller linked to the pump body 60.

[0044] Optionally, in one embodiment, the pump body 60 is configured as a high temperature resistant water pump, which has a small size, low noise, and can withstand hot water at a temperature of 100°C.

[0045] Reference Figure 1In one embodiment, the second water tank 50 is provided with a hot water inlet 51 and a hot water outlet 52, wherein the hot water inlet 51 is provided at the top of the second water tank 50, and the hot water outlet 52 is connected to the pump body 60. It can be understood that the hot water inlet 51 can be connected to a hot water input pipe, which is connected to the pipeline 41, or can be an integrated pipe with the pipeline 41, to ensure that the hot water in the pipeline 41 can flow into the second water tank 50 via the hot water inlet 51, wherein the hot water inlet 51 is provided at the top of the second water tank 50, to ensure that the second water tank 50 can play the function of storing water and reduce the amount of hot water falling back into the pipeline 41. Of course, in other embodiments, the hot water inlet 51 can also be provided on the side of the second water tank 50, and away from the heating element 42 or higher than the liquid level in the shell 21, to ensure the water storage capacity of the second water tank 50.

[0046] Specifically, the pipe 41 has a water inlet connection end 414 connected to the hot water inlet 51. After the float 22 seals the water inlet, the distance between the liquid level in the shell 21 and the water inlet connection end 414 is H, 10mm≤H≤15mm. It can be understood that the pressure generated by heat corresponds to the water temperature, and then corresponds to the specific height to which the hot water in the same pipe 41 can jump. By setting the height difference H between the liquid level in the shell 21 and the water inlet connection end 414 between 10mm and 15mm, when H≥10mm, the water flow temperature reaches 95°C and above, and then, by controlling the water flow temperature entering the second water tank 50, the outlet water temperature and water output flowing into the brewing module 30 can be reliably controlled.

[0047] Optionally, in one embodiment, the second water tank 50 is provided with an exhaust hole, and the exhaust hole is used to balance the air pressure in the second water tank 50, so as to avoid the reverse blockage of the pipeline 41 caused by excessive pressure in the second water tank 50, reduce the situation where the water in the pipeline 41 cannot flow into the second water tank 50, and ensure the smooth flow of hot water between the pipeline 41, the second water tank 50, and the brewing module 30.

[0048] Reference Figure 1 In one embodiment, the coffee machine further comprises a one-way valve 70, which is disposed between the first water tank 11 and the heating element 42, and the one-way valve 70 is configured to be connected in a direction from the first water tank 11 to the pipe 41; thus, the direction of the water flow can be controlled to ensure the uniqueness of the direction of the water flow, and at the same time, ensure the smoothness of the water flow in the pipe 41;

[0049] It can be understood that since the conduction direction of the one-way valve 70 is configured to be from the first water tank 11 toward the pipe 41, the risk of the water flow in the pipe 41 flowing back to the liquid level stabilization module 20 or even flowing back to the first water tank 11 due to steam pressure is reduced; and further, by setting the one-way valve 70 at a position close to the inlet of the pipe 41 corresponding to the heating element 42, at this time, since the distance between the water outlet of the first water tank 11 or the first outlet of the liquid level stabilization module 20 and the one-way valve 70 is large, the water pressure is large, which facilitates the water flow to smoothly pass through the one-way valve 70 and enter the pipe 41 provided with the heating element 42 for heating. At the same time, the risk of the steam pressure in the pipe 41 blocking the outlet of the one-way valve 70 can be reduced, thereby ensuring the continuous inflow of water and heating of the heating element 42.

[0050] Specifically, the one-way valve 70 is configured as a one-way valve 70 with no opening pressure, that is, in the process of water flowing from the liquid level stabilization module 20 to the pipeline 41, the one-way valve 70 is equivalent to one section in the pipeline 41, and can allow water to flow smoothly through the one-way valve 70 without any obstruction, which is beneficial to improving the efficiency of replenishing the water in the liquid level stabilization module 20 to the pipeline 41.

[0051] Reference Figure 1 In one embodiment, the pipeline 41 has a pipeline 41 portion where the internal liquid flows upward, and the heating element 42 is at least arranged on the pipeline 41 portion; it can be understood that the pipeline 41 includes a first pipe segment 411 and a second pipe segment 412 that extend up and down and are connected, the first pipe segment 411 is connected to the first outlet, and the second pipe segment 412 is connected to the second water tank 50, wherein the liquid in the second pipe segment 412 flows upward, the first pipe segment 411 and the second pipe segment 412 can be directly connected, or can be connected through other pipe segments, which is not limited here; the heating element 42 includes a first heating element 421 arranged in the second pipe segment 412, the second water tank 50 is connected to the second pipe segment 412, and is higher than the heating element 421. The upper end of the component 42; in this way, after heating for a certain period of time, the water in the second pipe section 412 is heated to generate steam pressure, and the steam pressure mainly acts on the water flow in the second pipe section 412, so that the water flows to the brewing module 30, effectively preventing the water in the pipeline 41 from flowing back due to the steam pressure, and preventing the steam pressure from acting on the first outlet or the one-way valve 70, affecting the stable outflow of water in the liquid level stabilization module 20 or the first water tank 11; facilitating the outflow of water in the first water tank 11 and replenishing it to the second pipe section 412, so that the liquid level of the water in the second pipe section 412 is relatively constant, ensuring that the water temperature of the water flowing out of the heating component 42 is roughly constant, while reducing the possibility of dry burning, thereby improving safety in use.

[0052] Further, the heating element 42 is arranged in an L-shape. It can be understood that the pipeline 41 also includes a third pipe section 413, and the third pipe section 413 is connected to the first pipe section 411 and the second pipe section 412; the heating element 42 also includes a second heating element 422, and the second heating element 422 is arranged in the third pipe section 413 and is arranged away from the first pipe section 411. At this time, the one-way valve 70 can be arranged in the third pipe section 413, and can also be arranged in the first pipe section 411, and is arranged close to the third pipe section 413, so that a large amount of steam pressure can be effectively prevented from flowing to the first pipe section 411 through the third pipe section 413, and the influence on the stable outflow of water in the liquid level stabilization module 20 can be reduced. At the same time, by using the arrangement of the second heating element 422 in the third pipe section 413, the length of the pipe 41 that can generate heat can be extended, which is conducive to increasing the area of ​​water heated in the pipe 41 and the amount of hot water formed. The third pipe section 413 can extend in a winding manner or in a straight line.

[0053] Furthermore, the first heating element 421 and the second heating element 422 are integrally arranged, which is beneficial to reducing the assembly process and avoiding the generation of a gap between the first heating element 421 and the second heating element 422, resulting in the water flow in the pipe 41 corresponding to the gap not being effectively heated, thereby reducing the influence of the water flow on the temperature of the water flow heated by the first heating element 421 and the second heating element 422.

[0054] Optionally, in one embodiment, the coffee machine further includes a water shortage detection device, and the water shortage detection device is disposed in the first water tank 11 and / or the liquid level stabilization module 20. The water shortage detection device and the heating element 42 are electrically connected to the controller so as to send out corresponding signals and warnings and cut off the power supply to the heating element 42 when the first water tank 11 or the shell 21 is in a water shortage state, or when both the first water tank 11 and the shell 21 are in a water shortage state, so as to prevent dry burning.

[0055] Specifically, the water shortage detection device can monitor the water level by means of a reed switch or Hall sensor matched with a magnet, capacitance detection, infrared detection, etc.

[0056] Optionally, in one embodiment, the power P of the heating element 42 satisfies: 1300W≤P≤1600W, so that the power P of the heating element 42 can be controlled between 1300W and 1600W, so as to control the heating speed and heating time of the water flow by the heating module 40.

[0057] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A coffee machine, characterized in that: include: The first water tank is provided with a water tank outlet; A brewing module and a pipeline, wherein the pipeline is connected between the water outlet of the water tank and the brewing module; A heating element, arranged on the pipeline; a second water tank, disposed in the pipeline and located between the heating element and the brewing module; and The pump body is connected to the second water tank and is used to pump the liquid in the second water tank into the brewing module.

2. The coffee machine according to claim 1, characterized in that The coffee machine further comprises a temperature sensor linked to the pump body, wherein the temperature sensor is used to detect the temperature of the liquid in the second water tank.

3. The coffee machine according to claim 1, characterized in that The coffee machine further comprises a time controller linked to the pump body, and the time controller is used to obtain the heating time of the heating element.

4. The coffee machine according to claim 1, characterized in that The second water tank is provided with a hot water inlet and a hot water outlet. The hot water inlet is arranged at the top of the second water tank, and the hot water outlet is connected to the pump body.

5. The coffee machine according to claim 4, characterized in that The coffee machine also includes a liquid level stabilization module, which includes a shell and a float. The shell is provided with a water inlet connected to the water outlet of the water tank, and is provided with a first outlet and a second outlet. The first outlet is connected to the pipeline, and the second outlet is connected to the atmosphere. The float is used to open or close the water inlet.

6. The coffee machine according to claim 5, characterized in that The pipeline has a water inlet connection end connected to the hot water inlet. After the float seals the water inlet, the distance between the liquid surface in the shell and the water inlet connection end is H, 10mm≤H≤15mm.

7. The coffee machine according to claim 5, characterized in that The coffee machine further comprises a water shortage detection device, and the water shortage detection device is arranged in the first water tank and / or the liquid level stabilization module; And / or, the power P of the heating element satisfies: 1300W≤P≤1600W.

8. The coffee machine according to claim 1, characterized in that The second water tank is provided with an exhaust hole, and the exhaust hole is used to balance the air pressure in the second water tank.

9. The coffee machine according to claim 1, characterized in that The coffee machine further comprises a one-way valve, which is disposed between the first water tank and the heating element, and the conducting direction of the one-way valve is configured to be from the first water tank toward the pipeline.

10. The coffee machine according to any one of claims 1 to 9, characterized in that The pipeline has a pipeline portion where the internal liquid flows upward, and the heating element is at least arranged on the pipeline portion; The heating element is arranged in an L shape.

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