Highly efficient low-temperature coffee extraction device and cooling method for low-temperature extraction

Abstract

To provide a low-temperature extraction device for coffee preparation and a cooling method for low-temperature extraction, which can ensure the taste of water-cooled coffee, improve heat dissipation efficiency, reduce noise, save space, and improve user experience. [Solution] The base 10 of the device is provided with an extraction assembly 50 and a cup holder assembly, and the extraction assembly, the extraction water channel, and a second heat exchange device are connected, the second heat exchange device is used to exchange heat with the liquid in the extraction water channel to cool it, and includes a first heat exchange device for exchanging heat with the coffee cup on the cup holder assembly to cool it, and during the extraction process, the second heat exchange device cools the liquid in the extraction water channel to the extraction temperature, and during collection and storage of the coffee liquid, the first heat exchange device cools the coffee cup to a storage temperature.

Description

[Technical Field]

[0001] The present invention relates to the technical field of coffee preparation, and in particular to a highly efficient cold brew coffee machine and cooling method for cold brewing. [Background technology]

[0002] Compared to traditional hot brew coffee, cold brew coffee can better preserve the aroma and flavor of the coffee beans, resulting in a smoother, softer coffee taste. At the same time, cold brew coffee is less acidic and has less caffeine, which is why it is so popular. Cold brew coffee is made using a cold brew coffee maker, which works by cooling drinking water and using pulse extraction technology to extract the coffee liquid.

[0003] To obtain lower-temperature drinking water, existing cold brew coffee makers use a cooling module to cool the drinking water. However, the cooling module generates a large amount of heat when cooling the drinking water. If the heat cannot be dissipated, the cooling efficiency of the cooling module is affected. For this reason, existing cold brew coffee makers often use a heat sink and a fan to remove heat from the cooling module. For example, utility model patent number CN220236638U discloses a multi-function coffee maker with an internal cooling module. The cooling module cools the water and opens and closes the cold water valve, controlling it to brew cold brew coffee. The cooling module includes a new semiconductor cooling product, a cold plate, a heat dissipation base, and a cooling fan. The cooling fan allows outside air to enter the housing cavity and blow onto the heat dissipation base to cool the water, and then the heated air is expelled to the outside.

[0004] However, the application of a heat sink or cooling fan in this structure results in low heat dissipation efficiency and high costs, which affect the heat dissipation of the cooling module, affecting the cooling efficiency of the cooling module and making it difficult to ensure the taste of cold brew coffee. At the same time, the heat sink or cooling fan occupies a large volume, limiting its installation location within the cold brew coffee maker and making it unsuitable for small coffee makers. Furthermore, dissipating heat through the heat sink or cooling fan results in increased noise and a poor user experience.

[0005] Furthermore, with existing cold brew coffee, the coffee liquid heats up immediately after brewing, affecting the taste, and the lack of effective insulation measures also affects the user experience.

[0006] The above drawbacks need to be addressed. Summary of the Invention [Problem to be solved by the invention]

[0007] To overcome the shortcomings of existing technologies, the present invention provides a highly efficient low-temperature coffee brewing apparatus and cooling method for low-temperature brewing, which uses two heat exchangers to cool drinking water and store coffee liquid at low temperatures, respectively, to ensure the flavor of cold-brewed coffee, and at the same time realizes heat exchange between the heat exchangers via a water cooling circuit, which not only improves heat dissipation efficiency but also reduces noise, saves space, and improves user experience. [Means for solving the problem]

[0008] The technical solutions of the present invention are as follows:

[0009] 1. A highly efficient coffee cold brewing device comprising a base, the base comprising: an extraction assembly connected to the extraction water passage, the extraction water passage being connected to one or more second heat exchange devices, the second heat exchange devices being used to exchange heat with the liquid in the extraction water passage to cool it, and the heat after heat exchange is dissipated by water cooling; The cup holder assembly is characterized by being provided with a first heat exchange device for exchanging heat with a coffee cup on the cup holder assembly to cool it, and dissipating the heat after the heat exchange by water cooling.

[0010] According to the present invention relating to the above solution, the second heat exchange device includes a cooling member and a second cooling sheet, the extraction water channel passes through the cooling member, the cooling member is connected to the cold end of the second cooling sheet to cool the liquid in the extraction water channel through the second cooling sheet, and the hot end of the second cooling sheet is connected to a water cooling circuit.

[0011] Furthermore, the water cooling circuit is provided with a second heat exchange member connected to the hot end of the second cooling sheet for absorbing heat from the second cooling sheet.

[0012] According to the present invention relating to the above solution, the first heat exchange device includes a first cooling sheet, the cold end of which is connected to the bottom support member of the cup holder assembly and is used to cool the bottom support member through the first cooling sheet, and the hot end of which is connected to a water cooling circuit.

[0013] Furthermore, the water cooling circuit is provided with a first heat exchange member connected to the hot end of the first cooling sheet for absorbing heat from the first cooling sheet.

[0014] According to the present invention relating to the above-mentioned solution, a cooling water tank is provided on the base, the water cooling circuit in the first heat exchange device is connected in series with the water cooling circuit in the second heat exchange device, and both ends of the circuit are connected to the drain outlet and the water inlet of the cooling water tank; Alternatively, the water-cooled circuit in the first heat exchanger is connected in parallel with the water-cooled circuit in the second heat exchanger, whereby both ends of the water-cooled circuit in the first heat exchanger are connected to the drain and water inlet of the cooling water tank, and both ends of the water-cooled circuit in the second heat exchanger are connected to the drain and water inlet of the cooling water tank.

[0015] Furthermore, the cooling water tank includes a drain tank and a water supply tank, and the drain tank is connected to the cold water inlet of the water cooling circuit in the first heat exchange device and the cold water inlet of the water cooling circuit in the second heat exchange device, and the water supply tank is connected to the hot water outlet of the water cooling circuit in the first heat exchange device and the hot water outlet of the water cooling circuit in the second heat exchange device.

[0016] On the other hand, a cooling method for low-temperature extraction of a highly efficient low-temperature coffee extraction apparatus, which is based on the above-mentioned highly efficient low-temperature coffee extraction apparatus, is as follows: The method includes a step in which, during the extraction process, the second heat exchange device cools the liquid in the extraction water channel to an extraction temperature, and, during collection and storage of the coffee liquid, the first heat exchange device cools the coffee cup on the cup holder assembly to a storage temperature.

[0017] According to the present invention relating to the above solution, during the extraction process, the extraction temperature is determined, and the second cooling sheet is controlled to cool the liquid flowing through the cooling member according to the extraction temperature until the liquid in the extraction water channel reaches the required temperature, and at the same time, the liquid in the water cooling circuit of the second heat exchange member is driven to circulate, and heat is exchanged with the second cooling sheet via the second heat exchange member.

[0018] According to the present invention relating to the above solution, during the collection and storage of the coffee liquid, the collection and storage temperature of the coffee liquid is determined, and based on that temperature, the first cooling sheet is controlled to cool the bottom support member in the cup holder assembly, thereby maintaining the coffee liquid in the coffee cup on the bottom support member at the required temperature, and at the same time, the liquid in the water cooling circuit of the first heat exchange member is driven to circulate, and heat is exchanged with the first cooling sheet through the first heat exchange member. [Effects of the Invention]

[0019] According to the present invention relating to the above-mentioned solution, the beneficial effects are as follows.

[0020] The present invention uses a second cooling sheet to cool drinking water and a first cooling sheet to cool the base on which the coffee cup is placed, thereby not only enabling low-temperature extraction of coffee liquid but also ensuring the storage temperature of the low-temperature extracted coffee liquid, thereby maintaining the best taste of the coffee liquid for a long period of time.

[0021] The present invention realizes heat dissipation and cooling of the first and second cooling sheets respectively through a water-cooling circuit, not only can it remove heat from the cooling sheets, but also has a low-cost and compact structure using a water-cooling heat dissipation method, which contributes to production and application. At the same time, the water-cooling heat dissipation method has higher heat dissipation efficiency than traditional air-cooling heat dissipation, contributes to noise control, and improves the user experience. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a schematic structural diagram of the present invention; [Figure 2] 1 is a schematic diagram of an extraction assembly of the present invention in an open state. FIG. [Figure 3] FIG. 1 is a top view of the present invention. [Figure 4] FIG. 4 is a partial cross-sectional view taken along the direction AA in FIG. 3. [Figure 5] FIG. 2 is an exploded view of the cup holder assembly of the present invention. [Figure 6] FIG. 2 is a cross-sectional view of a first heat exchange element according to the present invention. [Figure 7] FIG. 4 is a partial cross-sectional view taken along the direction BB in FIG. 3. [Figure 8] 1 is a schematic diagram of an extraction cooling section of the present invention. [Figure 9] 3 is a schematic diagram of the extraction cooling section of the present invention from another perspective. FIG. [Figure 10] FIG. 2 is an exploded view of the circuit board assembly and the first extraction cooling section of the present invention. [Figure 11] 1 is a cross-sectional view of an absorbing cooling element according to the present invention. [Figure 12] FIG. 4 is a partial cross-sectional view taken along the CC direction in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] As shown in Figures 1 to 12, the present invention proposes a highly efficient cold brew coffee maker to solve the problems of existing cold brew coffee makers, such as low cold brew efficiency and coffee liquid quickly warming up after cold brewing is complete, resulting in an unsatisfactory taste. The device cools the liquid in the brewing water channel and dissipates heat through a second heat exchanger to achieve efficient brewing. Furthermore, the device cools the coffee cup on the cup holder assembly, maintaining the cold brew coffee liquid stored in the coffee cup at an optimal temperature while simultaneously dissipating heat through the first heat exchanger to cool the liquid, achieving temperature balance.

[0025] The highly efficient low-temperature coffee brewing apparatus includes a base 10 on which an extraction assembly 50 and a cup holder assembly are mounted. The base 10 functions as a hardware support for the entire coffee brewing apparatus. The extraction assembly 50 is used to cold-brew coffee grounds to form a coffee liquid. The cup holder assembly is disposed below the extraction assembly 50 for placing a coffee cup 53 thereon to receive the cold-brewed coffee liquid. The base 10 is further provided with a circuit board assembly 90 for controlling the operation of the entire highly efficient low-temperature coffee brewing apparatus. The circuit board assembly 90 includes a circuit board bracket 91, a main PCB board 92, a motor PCB board 93, and a button 94. The main PCB board 92, the motor PCB board 93, and the button 94 are all assembled on the circuit board bracket 91 and attached to the base 10 via the circuit board bracket 91. The present invention separates the main PCB board 92 for centralized control of system functions from the motor PCB board 93 for controlling the operation of the water pump, which, firstly, makes effective use of the internal space of the circuit board bracket 91, and secondly, makes each function independent from each other to ensure the stability of system operation.

[0026] Specifically, as shown in FIGS. 3 and 7 to 11, in the structure for preparing cold brew coffee liquid, the extraction assembly 50 is connected to the extraction water channel, which is connected to the drinking water tank 30. A third water pump 802 is provided on the extraction water channel to pump the liquid in the drinking water tank 30 from the extraction water channel to the extraction assembly 50. The cooled liquid in the extraction water channel flows to the extraction assembly 50 and is used to prepare cold brew coffee. To cool the liquid in the low-temperature extraction water channel, the present invention connects the extraction water channel to one or more second heat exchangers, which exchange heat with the liquid in the extraction water channel to cool it. The second heat exchangers are also used to water-cool and dissipate the heat after heat exchange with the liquid in the extraction water channel.

[0027] The extraction water channel is connected to two second heat exchangers, specifically, the second heat exchanger 70 and the third heat exchanger 80. The second heat exchanger 70 and the third heat exchanger 80 may be provided with additional water cooling circuits for absorbing and releasing heat, thereby ensuring a sufficient cooling effect. In a specific implementation, the second heat exchanger 70 and the third heat exchanger 80 may cool the extraction water channel at the same position, or may sequentially cool different positions along the extraction water channel, which can be selected according to the specific situation.

[0028] The second heat exchange device 70 and the third heat exchange device 80 have similar structures. Taking the second heat exchange device 70 as an example, referring to FIGS. 10 and 11 , the second heat exchange device 70 includes a cooling element 73 and a second cooling sheet 74. The extraction water channel passes through the cooling element 73. The cooling element 73 is connected to the cold end of the second cooling sheet 74, which cools the liquid in the extraction water channel through the second cooling sheet 74. The hot end of the second cooling sheet 74 is connected to a water-cooled circuit. To ensure that the water-cooled circuit can sufficiently dissipate heat from the second cooling sheet 74, the water-cooled circuit in this embodiment is provided with a second heat exchange element 75, which is connected to the hot end of the second cooling sheet 74 to absorb heat from the second cooling sheet 74. In the present invention, the second cooling sheet 74 directly cools the liquid in the cooling member 73, which allows for a faster and more stable cooling rate and improves the efficiency of preparing cold-brewed coffee. In the present invention, the second cooling sheet 74 is cooled by dissipating heat through the second heat exchange member 75, ensuring the operational stability of the second cooling sheet 74 and achieving higher cooling efficiency.

[0029] To ensure that the second cooling sheet 74 sufficiently cools the liquid flowing inside the cooling member 73 and that the second heat exchange member 75 exchanges heat with the hot end of the second cooling sheet 74, a first insulating layer is provided on the outside of the cooling member 73 in this embodiment, and a second insulating layer 76 is provided on the outside of the second heat exchange member 75. The first insulating layer 72 and the second insulating layer 76 allow for sufficient transfer of internal cold air and heat. Preferably, the second cooling sheet 74 is a semiconductor cooling device connected to a circuit board assembly 90 (specifically, a main PCB 92) in the base 10. The main PCB 92 in the circuit board assembly 90 controls the operating state of the semiconductor cooling device to manage the cooling temperature of the low-temperature brewed liquid.

[0030] Furthermore, in this embodiment, the second heat exchange device 70 further includes a first heat exchange bracket 71 and a second heat exchange bracket 77, where the first heat exchange bracket 71 is positioned around the cooling body and the first insulating layer 72, and the second heat exchange bracket 77 is positioned around the second heat exchange member 75 and the second insulating layer 76, and the first heat exchange bracket 71 and the second heat exchange bracket 77 are assembled and fixed to fix the second heat exchange device 70 within the base 10. In this embodiment, by using the first heat exchange bracket 71 and the second heat exchange bracket 77, the second heat exchange device can be directly assembled as a complete module, and the integration degree of the second heat exchange device is higher.

[0031] 11 , in order to increase the contact area and contact time between the second cooling sheet 74 and the cold brew, and ensure sufficient cooling of the cold brew within the cooling member 73, the cooling member 73 in this embodiment has channels to increase the contact area. Specifically, the cooling member 73 includes a cooling body 731 and a cooling pipe 733 located inside the cooling body 731. A cooling water inlet 732 and a cooling water outlet 734 are provided at both ends of the cooling pipe 733, respectively. The cold brew enters the cooling body 731 through the cooling water inlet 732, is guided by the cooling pipe 733, and flows out from the cooling water outlet 734. The corresponding second heat exchange member 75 also has channels extending the path. See the following description of the cup holder assembly.

[0032] During the flow of the cold brew liquid, the second heat exchanger 70 and the third heat exchanger 80 are "connected in series" in order to drive and cool the liquid in the cold brew circuit. The water tank joint 31 of the drinking water tank 30 is connected to the third water pump 802 via an eighth pipe 408, the third water pump 802 is connected to the third heat exchanger 80 via a ninth pipe 409, the third heat exchanger 80 is connected to the second heat exchanger 70 via a tenth pipe 411, and the second heat exchanger 70 is connected to the extraction port 52 of the extraction assembly 50 via an eleventh pipe 411. The cold brew liquid falls through the extraction port 52 into the extraction vessel 51 in the extraction assembly 50 and into a coffee cup 53 located below the extraction vessel 51.

[0033] Specifically, as shown in Figures 3 to 6 and 12, in the structure for collecting and storing cold-brewed coffee liquid, the cup holder assembly includes a first heat exchanger, which exchanges heat with the coffee cup in the cup holder assembly to cool it, thereby maintaining the coffee liquid in the coffee cup at an optimum drinking temperature and ensuring the flavor of the coffee liquid.

[0034] The first heat exchanger includes a first cooling sheet 65, the cold end of which is connected to the bottom support member 66 of the cup holder assembly to cool the bottom support member 66 through the first cooling sheet 65. The first cooling sheet 65 is a semiconductor cooling device connected to the circuit board assembly 90 (specifically, the main PCB board 92) in the base 10. The first heat exchanger further includes a water-cooling circuit, the hot end of which is connected to the water-cooling circuit, and the heat after heat exchange is water-cooled and dissipated through the water-cooling circuit. The present invention directly cools the coffee cup through the first cooling sheet 65 and the bottom support member 66, thereby ensuring that the coffee liquid in the coffee cup is at a temperature that maintains the optimal flavor and that the temperature distribution is more uniform. At the same time, the first cooling sheet 65 is cooled and dissipated through the water-cooling circuit, ensuring the operational stability of the first cooling sheet 65 and maintaining it in an optimal operating state.

[0035] To ensure that the water-cooled circuit can sufficiently dissipate the heat from the first cooling sheet 65, the water-cooled circuit in this embodiment is provided with a first heat exchanger 63, which is connected to the hot end of the first cooling sheet 65 to absorb the heat from the first cooling sheet 65. To ensure the cooling effect of the first cooling sheet 65 on the coffee cup, the cup holder assembly in this embodiment includes a bottom support member 66, which contacts the first cooling sheet 65 and can diffuse the temperature of the cooling sheet, increasing the contact area with the coffee cup and ensuring a uniform temperature. Preferably, the bottom support member 66 is made of metal (such as lightweight aluminum), which has good heat conductivity and low cost.

[0036] In order to improve the heat exchange efficiency of the first heat exchange section 63 and the second heat exchange section 75, in this embodiment, channels for increasing the heat exchange area of ​​the liquid are provided inside the first heat exchange member 63 and the second heat exchange member 75. As shown in Fig. 11, taking the first heat exchange member 63 as an example, the first heat exchange member 63 includes a heat exchange body 631, a heat exchange pipe 633 is provided inside the heat exchange body 631, and a heat exchange water inlet 632 and a heat exchange water outlet 634 are provided at both ends of the heat exchange pipe 633, respectively. The heat exchange liquid (such as water) enters the heat exchange body 631 through the heat exchange water inlet 632, flows while being guided by the heat exchange pipe 633, and flows out from the heat exchange water outlet 634.

[0037] The first heat exchange device further includes a bottom support bracket 61. The bottom support bracket 61 is used to attach and fix the first heat exchange member 63. Specifically, a bracket accommodating cavity 611 recessed inward is provided in the center of the bottom support bracket 61, and the first heat exchange member 63 is attached within the bracket accommodating cavity 611.

[0038] The first heat exchange device further includes a bottom support cover 62 attached to the bottom support bracket 61, and the bottom support cover 62 is used to attach a first heat exchange component 63 and a first cooling sheet 65. Specifically, the bottom support cover 62 is provided with a cover accommodating cavity 621 for fixing and arranging a bottom support member 66, and a cover through-hole 622 penetrating in the vertical direction is provided in the center of the bottom support cover 62, and the first cooling sheet 65 is attached to the cover through-hole 622, thereby allowing the first cooling sheet 65 to come into contact with the bottom support member 66 and the first heat exchange component 63, respectively.

[0039] Through the specific structural design of the first heat exchanger, the present invention can increase the integration level of the first heat exchanger, significantly reduce the volume of the base, make assembly easier, and realize the function of the first heat exchanger itself.

[0040] 3 and 12, a cooling water tank 20 is provided on the base 10, and the cooling water tank 20 is used to store a cooling liquid and circulate the liquid. The cooling water tank 20 of the present invention can directly store cooling water and realize heat dissipation and cooling of each cooling sheet through water circulation, but the cooling water tank of the present invention can also store other cooling liquids and is not limited to water.

[0041] Furthermore, cooling water tank 20 includes drainage tank 21 and water supply tank 22, drainage tank 21 is connected to the cold water inlet of the water-cooled circuit of the first heat exchange device and the cold water inlet of the water-cooled circuit of the second heat exchange device, and water supply tank 22 is connected to the hot water outlet of the water-cooled circuit of the first heat exchange device and the hot water outlet of the water-cooled circuit of the second heat exchange device. Specifically, drainage position of drainage tank 21 is provided with drainage outlet 25, which is connected to the cold water inlet of the water-cooled circuit of the first heat exchange device and the cold water inlet of the water-cooled circuit of the second heat exchange device, and water supply position of water supply tank 22 is provided with water supply inlet 26, which is connected to the hot water outlet of the water-cooled circuit of the first heat exchange device and the hot water outlet of the water-cooled circuit of the second heat exchange device.

[0042] The drain tank 21 and the water supply tank 22 are separated by a partition plate 23, and one end of the drain tank 21 remote from the drain position communicates with one end of the water supply tank 22 remote from the water supply position. Specifically, a notch is provided at the top of the partition plate 23, which forms a return flow path 24 connecting the water supply tank 22 and the drain tank 21, and the liquid in the water supply tank 22 flows into the drain tank 21 via the return flow path 24. The structural design of the cooling water tank 20 in the present invention makes it possible to lengthen the flow distance of the cooling liquid in the cooling water tank 20, and after the high-temperature liquid has sufficiently dissipated heat, it can be reused at the positions of the first heat exchanger and the second heat exchanger to absorb heat.

[0043] In the present invention, the first heat exchanger and the second heat exchanger can use the same water-cooled circuit. That is, in one cycle, the coolant flows sequentially through the first heat exchanger and the second heat exchanger (or may flow through the second heat exchanger and then the first heat exchanger), cooling and storing the coffee liquid in the coffee cup through the first heat exchanger, and cooling the low-temperature brewed liquid through the second heat exchanger. For example, in a first specific embodiment, the water-cooled circuit of the first heat exchanger is connected in series with the water-cooled circuit of the second heat exchanger, and both ends of the series-connected circuit are connected to the drain and water inlet of the cooling water tank. In this embodiment, a single water pump can be used to drive the liquid throughout the entire water-cooled circuit.

[0044] In the present invention, the first heat exchanger and the second heat exchanger can use different water cooling circuits, i.e., the water cooling circuits used in the first heat exchanger and the second heat exchanger are connected in "parallel." For example, in the second specific embodiment, the water cooling circuit in the first heat exchanger is connected in parallel with the water cooling circuit in the second heat exchanger, so that both ends of the water cooling circuit in the first heat exchanger are connected to the water outlet and water inlet of the cooling water tank 20, and both ends of the water cooling circuit in the second heat exchanger are connected to the water outlet 25 and water inlet 26 of the cooling water tank 20. In this embodiment, the water cooling circuit in which the first heat exchanger is arranged is provided with a first water pump 64 for driving the liquid circulation, and the first water pump 64 is connected to the motor PCB board 93, and the water cooling circuit in which the second heat exchanger (including the third heat exchanger) is arranged is provided with a second water pump 801 for driving the liquid circulation, and the second water pump 801 is connected to the motor PCB board 93.

[0045] In the second specific embodiment, the cooling water tank 20 includes a second heat exchanger and a third heat exchanger, and each component is connected by a pipeline. The outlet 25 of the cooling water tank 20 is connected to the first water pump 64 through a first pipeline 401. The outlet end of the first water pump 64 is connected to the first heat exchanger 63 in the first heat exchanger through a second pipeline 402. The outlet end of the first heat exchanger 63 is connected to the water inlet 26 of the cooling water tank 20 through a third pipeline 403. The drain outlet 25 of the cooling water tank 20 is connected to a second water pump 801 through a fourth pipeline 404, the drain end of the second water pump 801 is connected to a second heat exchange element 75 in a second heat exchange device through a fifth pipeline 405, the drain end of the second heat exchange element 75 is connected to a second heat exchange element 75 in a third heat exchange device through a sixth pipeline 406, and the drain end of the second heat exchange element 75 is connected to a water supply port 26 of the cooling water tank 20 through a seventh pipeline 407.

[0046] In this embodiment, the cooling liquid passes through the second heat exchange device 70 and the third heat exchange device 80 in order before returning to the cooling water tank 20, and the drinking water passes through the third heat exchange device 80 and the second heat exchange device 70 in order before entering the extraction assembly 50, so that the flow direction of the cooling liquid in the second heat exchange device 70 and the heat exchange device 50 is opposite to the flow direction of the drinking water in the second heat exchange device 70 and the third heat exchange device 80, which can sufficiently cool the drinking water during the cooling process and sufficiently dissipate heat from the second cooling sheet 74 in the second heat exchange device 70 and the third heat exchange device 80. In other embodiments, the flow direction of the cooling liquid in the second heat exchange device 70 and the third heat exchange device 80 can be the same as the flow direction of the drinking water in the second heat exchange device 70 and the third heat exchange device 80.

[0047] The present invention performs water-cooling by utilizing a water-cooling circuit in which a first heat exchanger is arranged and a water-cooling circuit in which a second heat exchanger (including a second heat exchanger 70 and a third heat exchanger 80) is arranged, thereby effectively dissipating the heat from the first cooling sheet and the second cooling sheet. On the one hand, the two cooling sheets can be used to more efficiently cool the cold brew coffee during preparation and storage to ensure the taste of the coffee, and on the other hand, the water-cooling circuit can be used to achieve rapid heat dissipation, and at the same time, the whole coffee maker will not generate noise, improving the user experience.

[0048] Furthermore, through the structural design of the first heat exchanger and the second heat exchanger, the present invention not only increases the integration of the cooling structure within the entire coffee cup, which is beneficial to the manufacturing and assembly of the coffee cup, but also significantly reduces the volume occupied by the heat exchanger within the coffee maker, thereby realizing a compact design.

[0049] Based on the above-mentioned high-efficiency cold coffee brewing apparatus, the present invention further provides a low-temperature brewing cooling method for a high-efficiency cold coffee brewing apparatus, which includes two processes: cooling during the brewing process and cooling during the coffee liquid collection and storage process. During the brewing process, a second heat exchanger cools the liquid in the brewing water channel to the brewing temperature, and during the coffee liquid collection and storage, a first heat exchanger cools the coffee cup in the coffee cup assembly to the storage temperature.

[0050] During the extraction process, the extraction temperature is determined, and the second cooling sheet is controlled according to the extraction temperature to cool the liquid flowing through the cooling member until the liquid in the extraction water channel reaches the required temperature. During this process, the temperature sensor is used to detect the temperature of the liquid in the extraction water channel in real time, and closed-loop control of the temperature of the second cooling sheet is realized through a closed-loop circuit in the main PCB board.

[0051] The motor PCB drives the second water pump to circulate the liquid in the water cooling circuit through the second heat exchange member, which then exchanges heat with the second cooling sheet. This heat exchange process can be performed simultaneously with the extraction cooling process, or can be performed continuously, or can be specifically configured as needed.

[0052] During the process of collecting and storing the coffee liquid, the collecting and storing temperature of the coffee liquid is determined, and based on that temperature, the first cooling sheet is controlled to cool the bottom support member in the cup holder assembly, thereby maintaining the coffee liquid in the coffee cup on the bottom support member at a required temperature. During this process, a temperature sensor is used to detect the temperature of the coffee liquid in the coffee cup in real time, or a temperature sensor is used to detect the temperature of the bottom support member as the temperature of the coffee liquid in real time. After obtaining this temperature, closed-loop control of the temperature of the first cooling sheet is realized through the control system of the main PCB board.

[0053] The motor PCB board drives the liquid circulation in the water cooling circuit through the first heat exchange member via the first water pump, and exchanges heat with the first cooling sheet via the first heat exchange member. This heat exchange process may be performed simultaneously with the coffee liquid storage and cooling process, or may be performed continuously, or may be specifically configured as needed.

[0054] Preferably, in the above two water cooling cycles, a water pump with adjustable flow rate may be adopted for each water pump, and the flow rate of each water pump may be adjusted by detecting the hot end temperatures of the first cooling sheet and the second cooling sheet to meet different heat dissipation and cooling requirements.

[0055] Those skilled in the art may make improvements or modifications based on the above description, and it should be understood that all these improvements and modifications fall within the scope of protection of the appended claims of the present invention.

[0056] The above has illustratively described the present invention patent in conjunction with the accompanying drawings, but the realization of the present invention patent is not limited to the above method, as long as various improvements are made using the method concepts and technical solutions of the present invention patent, or the concepts and technical solutions of the present invention patent are directly applied to other situations without improvement, they all fall within the protection scope of the present invention. [Explanation of symbols]

[0057] 10 base 20 Cooling water tank 21 Drainage tank 22 Water tank 23 Divider 24 Return flow path 25 Drain 26 Water inlet 30 Drinking Water Tank 31 Water tank fitting 401 First Pipeline 402 Second Pipeline 403 Third Pipeline 404 Fourth Pipe 405 5th Pipeline 406 6th Pipeline 407 7th Pipeline 408 8th Pipeline 409 9th Pipeline 410 First 0 Pipe 411 11th Pipeline 50 Extraction Assembly 51 Extraction vessel 52 Extraction port 53 Coffee Cup 61 Bottom support bracket 611 Bracket receiving cavity 62 Bottom support cover 621 Cover Receiving Cavity 622 Cover through hole 63 First heat exchange member 631 Heat exchanger body 632 Heat exchange water inlet 633 Heat exchange pipe 634 Heat exchange water outlet 64 First Water Pump 65 First Cooling Sheet 66 Bottom support member 70 Second heat exchange device 71 First heat exchange bracket 72 First insulation layer 73 Cooling material 731 Cooling unit 732 Cooling water inlet 733 Cooling pipe line 734 Cooling water outlet 74 Second Cooling Sheet 75 Second heat exchange member 76 Second insulation layer 77 Second heat exchange bracket 80 Third heat exchange device 801 Second water pump 802 Third Water Pump 90 Circuit Board Assembly 91 Circuit board bracket 92 Main PCB board 93 Motor PCB board 94 Buttons

Claims

1. 1. A highly efficient coffee cold brewing device comprising a base, the base comprising: an extraction assembly connected to the extraction water passage, the extraction water passage being connected to one or more second heat exchange devices, the second heat exchange devices being used to exchange heat with the liquid in the extraction water passage to cool it, and the heat exchanged is dissipated by water cooling; a cup holder assembly including a first heat exchange device for exchanging heat with and cooling a coffee cup placed on the cup holder assembly, and dissipating the heat after the heat exchange by water cooling; is established, The second heat exchange device includes a cooling member and a second cooling sheet, the extraction water passages pass through the cooling member, the cooling member is connected to a cold end of the second cooling sheet to cool the liquid in the extraction water passages through the second cooling sheet, and the hot end of the second cooling sheet is connected to a water cooling circuit. A highly efficient low-temperature coffee extraction device.

2. 2. The highly efficient low-temperature coffee brewing device according to claim 1, wherein the water cooling circuit is provided with a second heat exchange member connected to the hot end of the second cooling sheet for absorbing heat from the second cooling sheet.

3. 2. The high-efficiency low-temperature coffee brewing apparatus according to claim 1, characterized in that the first heat exchange device includes a first cooling sheet, the cold end of which is connected to the bottom support member of the cup holder assembly and is used to cool the bottom support member through the first cooling sheet, and the hot end of which is connected to a water cooling circuit.

4. 4. The highly efficient low-temperature coffee brewing device according to claim 3, wherein the water cooling circuit is provided with a first heat exchange member connected to the hot end of the first cooling sheet for absorbing heat from the first cooling sheet.

5. The base is provided with a cooling water tank, the water cooling circuit in the first heat exchanger is connected in series with the water cooling circuit in the second heat exchanger, and both ends of the circuit are connected to the drain outlet and the water inlet of the cooling water tank; Alternatively, the water cooling circuit in the first heat exchanger is connected in parallel with the water cooling circuit in the second heat exchanger, whereby both ends of the water cooling circuit in the first heat exchanger are connected to the drain and water inlets of the cooling water tank, and both ends of the water cooling circuit in the second heat exchanger are connected to the drain and water inlets of the cooling water tank.

6. 6. A highly efficient low-temperature coffee brewing apparatus as described in claim 5, characterized in that the cooling water tank includes a drainage tank and a water supply tank, the drainage tank is connected to the cold water inlet of the water cooling circuit in the first heat exchanger and the cold water inlet of the water cooling circuit in the second heat exchanger, and the water supply tank is connected to the hot water outlet of the water cooling circuit in the first heat exchanger and the hot water outlet of the water cooling circuit in the second heat exchanger.

7. A cooling method for low-temperature extraction based on the highly efficient low-temperature coffee extraction device according to any one of claims 1 to 6, A cooling method for low-temperature brewing of a highly efficient coffee cold brewing device, comprising the steps of: a second heat exchanger cooling the liquid in the brewing water channel to a brewing temperature during the brewing process; and a first heat exchanger cooling the coffee cup on the coffee holder assembly to a storage temperature during the collection and storage of the coffee liquid.

8. 8. The cooling method for low-temperature extraction of a highly efficient coffee cold extraction device as described in claim 7, characterized in that during the extraction process, an extraction temperature is determined, and the second cooling sheet is controlled to cool the liquid flowing through the cooling member according to the extraction temperature until the liquid in the extraction water channel reaches the required temperature, and at the same time, the liquid in the water cooling circuit of the second heat exchange member is driven to circulate and exchange heat with the second cooling sheet through the second heat exchange member.

9. 8. The cooling method for low-temperature extraction of a highly efficient coffee cold extraction device as described in claim 7, characterized in that during the collection and storage of the coffee liquid, the collection and storage temperature of the coffee liquid is determined, and based on that temperature, the first cooling sheet is controlled to cool the bottom support member in the cup holder assembly, thereby keeping the coffee cup on the bottom support member at a required temperature, and at the same time, the liquid in the water cooling circuit flowing through the first heat exchange assembly is driven to circulate, and heat exchange with the first cooling sheet through the first heat exchange member.

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