Silent type cold extraction coffee machine

Abstract

The utility model discloses a mute type cold extraction coffee machine in the technical field of coffee preparation, which comprises a machine base and is characterized in that an extraction component connected with an extraction water path is arranged on the machine base, the extraction water path is connected with one or more second heat exchange devices, and the second heat exchange devices are used for heat exchange and cooling of liquid in the extraction water path. The heat after heat exchange is subjected to water-cooling heat dissipation; the second heat exchange device comprises a second refrigeration sheet and a cold extraction water cooling loop, the cold end of the second refrigeration sheet exchanges heat with the extraction water path, and the hot end of the second refrigeration sheet is connected with the cold extraction water cooling loop and exchanges heat with the cold extraction water cooling loop. Compared with an existing fan heat dissipation mode, the cold extraction water cooling loop is used for conducting heat exchange on the hot end of the second refrigeration piece, the heat exchange speed is higher, the cooling effect of the hot end of the second refrigeration piece is better, the mute effect of the water cooling mode is better, and better use experience is provided for a user.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee preparation, and specifically, to a silent cold brew coffee machine. Background Art

[0002] Existing cold brew coffee is mostly produced by a cold brew coffee machine. During the production of cold brew coffee, the water for preparing coffee is first cooled, and then cold brew coffee is produced. For example, the patent with the authorization announcement number CN213850142U discloses a refrigeration device and a coffee machine. In this coffee machine, a semiconductor refrigerator is provided. The semiconductor refrigerator has a cold end and a hot end. The cold end can absorb heat, and the hot end can release heat to achieve the purpose of refrigeration. A cold quantity conductor is arranged at the cold end of the semiconductor refrigerator and extends into the water in the refrigeration water tank to conduct the cold quantity of the semiconductor refrigerator to the water so that the water can be cooled to a preset temperature; a heat dissipation component is arranged at the hot end of the semiconductor refrigerator to dissipate the heat at the hot end of the semiconductor refrigerator.

[0003] In traditional cold brew coffee machines, the heat dissipation components mostly use the fan method for heat dissipation. In the structure of the above-mentioned patent, the heat dissipation component includes a heat sink and a fan. The heat sink is attached to the hot end of the semiconductor refrigerator, and the fan is arranged outside the heat sink to dissipate the heat of the heat sink.

[0004] However, the heat dissipation efficiency of the heat sink and the fan in such a structure is relatively low and the cost is relatively high; at the same time, the heat dissipation method using a fan is prone to generate relatively large noise, and the user experience is not good.

[0005] The above defects are worthy of improvement. Summary of the Utility Model

[0006] In order to overcome the deficiencies of the existing technology, the utility model provides a silent cold brew coffee machine. It exchanges heat for the hot end of the second refrigerating sheet through a cold brew water cooling loop. Compared with the existing fan heat dissipation method, the heat exchange speed is faster, the cooling effect of the hot end of the second refrigerating sheet is better, and the water cooling method has a better silent effect, giving users a better user experience.

[0007] The technical solution of the utility model is as follows:

[0008] A silent cold brew coffee machine includes a machine base. It is characterized in that an extraction component connected to an extraction water circuit is arranged on the machine base. The extraction water circuit is connected to one or more second heat exchange devices. The second heat exchange device is used to exchange heat and cool the liquid in the extraction water circuit, and the heat after heat exchange is dissipated by water cooling.

[0009] The second heat exchange device includes a second Peltier cooler and a cold extraction water cooling circuit. The cold end of the second Peltier cooler exchanges heat with the extraction water path, and the hot end of the second Peltier cooler is connected to the cold extraction water cooling circuit and exchanges heat with the cold extraction water cooling circuit.

[0010] For the present invention according to the above solution, it is characterized in that the second heat exchange device further includes a refrigeration component. The extraction water path passes through the refrigeration component, and the refrigeration component is connected to the cold end of the second Peltier cooler for cooling the liquid in the extraction water path through the second Peltier cooler.

[0011] Furthermore, a second heat exchange component is provided on the cold extraction water cooling circuit. The second heat exchange component is connected to the hot end of the second Peltier cooler for absorbing the heat of the second Peltier cooler.

[0012] Even further, the second heat exchange device further includes a first heat exchange bracket and a second heat exchange bracket. The first heat exchange bracket is located outside the refrigeration component, and the second heat exchange bracket is located outside the second heat exchange component, and the first heat exchange bracket and the second heat exchange bracket are assembled and fixed.

[0013] For the present invention according to the above solution, it is characterized in that a cup holder assembly is further provided on the machine base, which includes a first heat exchange device for exchanging heat and cooling the coffee cup on the cup holder assembly, and the heat after heat exchange is dissipated by water cooling.

[0014] Furthermore, the first heat exchange device includes a first Peltier cooler. The cold end of the first Peltier cooler is connected to the bottom support piece of the cup holder assembly for cooling the bottom support piece through the first Peltier cooler, and its hot end is connected to the heat preservation water cooling circuit.

[0015] Even further, a first heat exchange component is provided on the heat preservation water cooling circuit. The first heat exchange component is connected to the hot end of the first Peltier cooler for absorbing the heat of the first Peltier cooler.

[0016] Even further, a cooling water tank is provided on the machine base. The heat preservation water cooling circuit is connected in series with the cold extraction water cooling circuit, and both ends of the circuit are connected to the water outlet interface and the water inlet interface of the cooling water tank.

[0017] Even further, a cooling water tank is provided on the machine base. The heat preservation water cooling circuit is connected in parallel with the cold extraction water cooling circuit, so that both ends of the heat preservation water cooling circuit are connected to the water outlet interface and the water inlet interface of the cooling water tank, and both ends of the cold extraction water cooling circuit are connected to the water outlet interface and the water inlet interface of the cooling water tank.

[0018] Further, the cooling water tank includes a water outlet tank and a water inlet tank. The water outlet tank is connected to the cold water inlet of the heat preservation water cooling circuit and the cold water inlet of the cold extraction water cooling circuit, and the water inlet tank is connected to the hot water outlet of the heat preservation water cooling circuit and the hot water outlet of the cold extraction water cooling circuit.

[0019] For the present utility model according to the above solution, its beneficial effects are as follows: The present utility model cools the drinking water through the first refrigeration chip, and thus can realize the preparation of cold brew coffee; in this process, the hot end of the second refrigeration chip is heat exchanged through the cold extraction water cooling circuit, and its heat exchange speed is fast, which can ensure the refrigeration efficiency of the second refrigeration chip; and the heat dissipation method of the extraction water cooling circuit has a good sound insulation effect, which can give users a better use experience.

[0020] In addition, the present utility model can also cool the base where the coffee cup is located through the first refrigeration chip, ensure the storage temperature of the cold brew coffee liquid, and make the coffee liquid maintain the best drinking taste for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is a schematic diagram of the open state of the extraction assembly of the present utility model;

[0023] Figure 3 is a top view of the present utility model;

[0024] Figure 4 is Figure 3 a partial cross-sectional view taken along the line A-A in

[0025] Figure 5 is an exploded view of the cup holder assembly of the present utility model;

[0026] Figure 6 is a sectional view of the first heat exchange component of the present utility model;

[0027] Figure 7 is Figure 3 a partial cross-sectional view taken along the line B-B in

[0028] Figure 8 is a schematic diagram of the extraction refrigeration part of the present utility model;

[0029] Figure 9 is a schematic diagram of another perspective of the extraction refrigeration part of the present utility model;

[0030] Figure 10 is an exploded view of the circuit board assembly and the first extraction refrigeration part of the present utility model;

[0031] Figure 11This is a sectional view of the cold absorption component in the present utility model;

[0032] Figure 12 It is Figure 3 a partial sectional view in the C-C direction in

[0033] In the figure, each reference numeral is as follows:

[0034] 10, machine base;

[0035] 20, cooling water tank; 21, water outlet tank; 22, water inlet tank; 23, partition board; 24, return channel; 25, water outlet interface; 26, water inlet interface;

[0036] 30, drinking water tank; 31, water tank interface;

[0037] 401, first pipeline; 402, second pipeline; 403, third pipeline; 404, fourth pipeline; 405, fifth pipeline; 406, sixth pipeline; 407, seventh pipeline; 408, eighth pipeline; 409, ninth pipeline; 410, tenth pipeline; 411, eleventh pipeline;

[0038] 50, extraction assembly; 51, extraction container; 52, extraction interface; 53, coffee cup;

[0039] 61, base support; 611, support accommodation cavity; 62, base cover; 621, cover accommodation cavity; 622, cover perforation; 63, first heat exchange component; 631, heat exchange body; 632, heat exchange water inlet; 633, heat exchange pipeline; 634, heat exchange water outlet; 64, first water pump; 65, first refrigeration chip; 66, base plate;

[0040] 70, second heat exchange device; 71, first heat exchange support; 72, first heat insulation layer; 73, refrigeration component; 731, refrigeration body; 732, refrigeration water inlet; 733, refrigeration pipeline; 734, refrigeration water outlet; 74, second refrigeration chip; 75, second heat exchange component; 76, second heat insulation layer; 77, second heat exchange support;

[0041] 80, third heat exchange device; 801, second water pump; 802, third water pump;

[0042] 90, circuit board assembly; 91, circuit board support; 92, main PCB board; 93, motor PCB board; 94, button. Detailed implementation mode

[0043] The present utility model will be further described below in conjunction with the drawings and the implementation mode:

[0044] As Figures 1 to 12As shown in the figure, in order to solve the problems of low cold extraction temperature efficiency and poor taste due to the rapid temperature rise of coffee liquid after cold extraction in the existing cold extraction coffee machine, the present utility model proposes a silent cold extraction coffee machine, which first cools the liquid in the extraction water circuit and dissipates heat through the second heat exchange device, achieving efficient extraction; and realizes silent cooling through the use of the cold extraction water cooling circuit.

[0045] The silent cold extraction coffee machine includes a machine base 10, and an extraction assembly 50 is provided on the machine base 10. The machine base 10 serves as the hardware support foundation for the entire cold extraction coffee device, and the extraction assembly 50 is used to cold extract coffee powder to form coffee liquid. A circuit board assembly 90 for controlling the operation of the entire silent cold extraction coffee machine is also provided inside the machine base 10. 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 installed on the machine base 10 through the circuit board bracket 91. In the present utility model, the main PCB board 92 for realizing the centralized control of system functions and the motor PCB board 93 for controlling the operation of the water pump are separated. On the one hand, the internal space of the circuit board bracket 91 can be effectively utilized, and on the other hand, each function can be independent of each other to ensure the stability of system operation.

[0046] Specifically, as Figure 3 、 Figures 7 to 11 shown, in the structure for preparing cold extraction coffee liquid, the extraction assembly 50 is connected to the extraction water circuit, the extraction water circuit is connected to the drinking water tank 30, and a third water pump 802 is provided on the extraction water circuit. The third water pump 802 is used to pump the liquid in the drinking water tank 30 into the extraction assembly 50 via the extraction water circuit. The cooled liquid in the extraction water circuit flows to the position of the extraction assembly 50 to prepare cold extraction coffee. In order to cool the liquid in the cold extraction water circuit, in the present utility model, the extraction water circuit is connected to one or more second heat exchange devices, and the second heat exchange device is used to exchange heat and cool the liquid in the extraction water circuit. The second heat exchange device is also used to perform water cooling and heat dissipation on the heat after heat exchange, so that the heat after exchanging heat and cooling with the liquid in the extraction water circuit can be dissipated.

[0047] The extraction water circuit is connected to two second heat exchange devices, specifically the second heat exchange device 70 and the third heat exchange device 80. In the second heat exchange device 70 and the third heat exchange device 80, the absorption and dissipation of heat by the cold extraction water cooling circuit can be increased to ensure the cooling effect. In the specific implementation process, the second heat exchange device 70 and the third heat exchange device 80 can cool the extraction water circuit at the same position, or can sequentially cool different positions along the extension of the extraction water circuit according to specific selection.

[0048] 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, please refer to Figure 10 and Figure 11 . The second heat exchange device 70 includes a refrigeration component 73 and a second refrigeration sheet 74. The extraction water path passes through the refrigeration component 73. The refrigeration component 73 is connected to the cold end of the second refrigeration sheet 74 and is used to cool the liquid in the extraction water path through the second refrigeration sheet 74. The hot end of the second refrigeration sheet 74 is connected to the cold extraction water cooling loop. In order to ensure the full dissipation of the heat of the second refrigeration sheet 74 by the cold extraction water cooling loop, a second heat exchange component 75 is provided on the cold extraction water cooling loop in this embodiment. The second heat exchange component 75 is connected to the hot end of the second refrigeration sheet 74 and is used to absorb the heat of the second refrigeration sheet 74. In the present utility model, the second refrigeration sheet 74 directly cools the liquid in the refrigeration component 73, making the cooling speed faster and more stable, and improving the production efficiency of cold brew coffee liquid. The present utility model further dissipates heat from the second refrigeration sheet 74 through the second heat exchange component 75, which can ensure the working stability of the second refrigeration sheet 74 to achieve better refrigeration efficiency.

[0049] To ensure the full refrigeration of the liquid flowing through the refrigeration component 73 by the second refrigeration sheet 74 and the heat exchange of the hot end of the second refrigeration sheet 74 by the second heat exchange component 75, a first heat insulation layer 72 is provided outside the refrigeration component 73 in this embodiment, and a second heat insulation layer 76 is provided outside the second heat exchange component 75. The first heat insulation layer 72 and the second heat insulation layer 76 are used to ensure the full transfer of internal cold and heat. Preferably, the second refrigeration sheet 74 is a semiconductor refrigerator connected to the circuit board assembly 90 (specifically referring to the main PCB board 92) in the machine base 10. The main PCB board 92 in the circuit board assembly 90 controls the working state of the semiconductor refrigerator to realize the control of the refrigeration temperature of the cold brew liquid.

[0050] In addition, in this embodiment, the second heat exchange device 70 further includes a first heat exchange bracket 71 and a second heat exchange bracket 77. The first heat exchange bracket 71 is located outside the refrigeration body and the first heat insulation layer 72, and the second heat exchange bracket 77 is located outside the second heat exchange component 75 and the second heat insulation layer 76. The first heat exchange bracket 71 and the second heat exchange bracket 77 are assembled and fixed to fix the entire second heat exchange device 70 inside the machine base 10. Through the application of the first heat exchange bracket 71 and the second heat exchange bracket 77, this embodiment can directly assemble the second heat exchange device as a complete module, and the integration degree of the second heat exchange device is higher.

[0051] Such as Figure 11As shown, in order to increase the contact area and contact time between the second Peltier cooler 74 and the cold brew liquid and ensure sufficient cooling of the cold brew liquid in the refrigeration component 73, the refrigeration component 73 in this embodiment has a channel for increasing the contact area. Specifically, the refrigeration component 73 includes a refrigeration body 731 and a refrigeration pipeline 733 located inside the refrigeration body 731. Refrigeration water inlets 732 and refrigeration water outlets 734 are respectively arranged at both ends of the refrigeration pipeline 733. The cold brew liquid enters the refrigeration body 731 through the refrigeration water inlet 732, rotates under the guidance of the refrigeration pipeline 733, and flows out through the refrigeration water outlet 734. The corresponding second heat exchange component 75 also has a channel for extending the path. Please refer to the following description of the cup holder assembly part.

[0052] During the flow of the cold brew liquid, the second heat exchange device 70 and the third heat exchange device 80 are "connected in series" in sequence to drive and cool the liquid in the cold brew loop. The water tank interface 31 of the drinking water tank 30 is connected to the third water pump 802 through the eighth pipeline 408. The third water pump 802 is connected to the third heat exchange device 80 through the ninth pipeline 409. The third heat exchange device 80 is connected to the second heat exchange device 70 through the tenth pipeline 410. The second heat exchange device 70 is connected to the extraction interface 52 of the extraction assembly 50 through the eleventh pipeline 411. The cold brew liquid falls into the extraction container 51 in the extraction assembly 50 through the extraction interface 52 and then falls into the coffee cup 53 located below the extraction container 51.

[0053] As Figures 3 to 6 , Figure 12 As shown, a cup holder assembly is further provided on the machine base 10. The cup holder assembly is placed below the extraction assembly 50 and is used to place the coffee cup 53 and receive the cold brewed coffee liquid. The present utility model cools the coffee cup on the cup holder assembly to ensure that the cold brewed coffee liquid stored in the coffee cup remains at the optimal temperature. At the same time, heat dissipation and cooling are carried out through the first heat exchange device to achieve temperature balance.

[0054] In the structure for collecting and storing cold brewed coffee liquid, the cup holder assembly includes a first heat exchange device. The first heat exchange device is used to exchange heat and cool the coffee cup on the cup holder assembly so that the coffee liquid in the coffee cup maintains the optimal drinking temperature and ensures the taste of the coffee liquid. In order to ensure the refrigeration and cooling effect of the first Peltier cooler 65 on the coffee cup, the cup holder assembly in this embodiment includes a bottom support sheet 66. The bottom support sheet 66 is in contact with the first heat exchange device and can spread the temperature of the Peltier cooler to increase the contact area with the coffee cup and ensure uniform temperature. Preferably, the bottom support sheet 66 is made of a metal material (such as aluminum, which is light in weight), can conduct heat more effectively, and has a lower cost.

[0055] The first heat exchange device includes a first Peltier cooler 65. The cold end of the first Peltier cooler 65 is connected to the bottom support piece 66 of the cup holder assembly, and is used to cool down the bottom support piece 66 through the first Peltier cooler 65. The first Peltier cooler 65 is a semiconductor cooler connected to the circuit board assembly 90 (specifically referring to the main PCB board 92) inside the machine base 10. The first heat exchange device further includes a heat preservation water cooling circuit. The hot end of the first Peltier cooler 65 is connected to the heat preservation water cooling circuit, and is used to perform water cooling heat dissipation on the heat after heat exchange through this heat preservation water cooling circuit. In the present utility model, the coffee cup is directly cooled and temperature-reduced through the first Peltier cooler 65 and the bottom support piece 66, which can ensure that the coffee liquid in the coffee cup is at the temperature with the optimal taste, and the temperature distribution is more balanced. At the same time, the first Peltier cooler 65 is cooled and temperature-reduced through the heat preservation water cooling circuit, ensuring the working stability of the first Peltier cooler 65 and enabling it to be in the optimal working state.

[0056] In order to ensure the full dissipation of the heat of the first Peltier cooler 65 by the heat preservation water cooling circuit, a first heat exchange component 63 is provided on the heat preservation water cooling circuit in this embodiment. The first heat exchange component 63 is connected to the hot end of the first Peltier cooler 65 and is used to absorb the heat of the first Peltier cooler 65.

[0057] In order to increase the heat exchange efficiency of the first heat exchange component 63 and the second heat exchange component 75, channels for increasing the liquid heat exchange area are provided inside the first heat exchange component 63 and the second heat exchange component 75 in this embodiment. As Figure 11 shown, taking the first heat exchange component 63 as an example, the first heat exchange component 63 includes a heat exchange body 631. A heat exchange pipeline 633 is provided inside the heat exchange body 631. The two ends of the heat exchange pipeline 633 are respectively provided with a heat exchange water inlet 632 and a heat exchange water outlet 634. The liquid (such as water) for heat exchange enters the inside of the heat exchange body 631 through the heat exchange water inlet 632, turns around under the guidance of the heat exchange pipeline 633, and flows out through the heat exchange water outlet 634.

[0058] The first heat exchange device further includes a bottom support bracket 61. The bottom support bracket 61 is used to install and fix the first heat exchange component 63. Specifically, a concave bracket accommodation cavity 611 is provided in the middle of the bottom support bracket 61, and the first heat exchange component 63 is installed in the bracket accommodation cavity 611.

[0059] The first heat exchange device further includes a bottom support cover 62. The bottom support cover 62 is installed on the bottom support bracket 61. The bottom support cover 62 is used to install the first heat exchange component 63 and the first Peltier cooler 65. Specifically, a cover accommodation cavity 621 is provided on the bottom support cover 62. The cover accommodation cavity 621 is used to fixedly install the bottom support piece 66. A cover through hole 622 that penetrates up and down is further provided in the middle of the bottom support cover 62. The first Peltier cooler 65 is installed at the position of the cover through hole 622, so that the first Peltier cooler 65 can contact the bottom support piece 66 and the first heat exchange component 63 respectively.

[0060] The utility model makes the first heat exchange device more integrated through the specific structural design of the first heat exchange device, can fully reduce the volume of the base part, is more conducive to assembly, and realizes the inherent functions of the first heat exchange device.

[0061] like Figure 3 、 Figure 12 As shown, a cooling water tank 20 is provided on the base 10. The cooling water tank 20 is used to store and circulate a cooling liquid. The cooling water tank 20 of the present invention can directly store cooling water, which can be circulated to dissipate heat and cool the refrigeration fins. Other cooling liquids can also be stored in the cooling water tank of the present invention, and the present invention is not limited to water.

[0062] The cooling water tank 20 includes a water outlet tank 21 and a water inlet tank 22. The water outlet tank 21 is connected to the cold water inlet of the thermal insulation water cooling circuit and the cold water inlet of the cold extraction water cooling circuit, and the water inlet tank 22 is connected to the hot water outlet of the thermal insulation water cooling circuit and the hot water outlet of the cold extraction water cooling circuit. Specifically, the water outlet position of the water outlet tank 21 is provided with a water outlet interface 25, which is connected to the cold water inlet of the thermal insulation water cooling circuit and the cold water inlet of the cold extraction water cooling circuit; the water inlet position of the water inlet tank 22 is provided with a water inlet interface 26, which is connected to the hot water outlet of the thermal insulation water cooling circuit and the hot water outlet of the cold extraction water cooling circuit.

[0063] The water outlet tank 21 and the water inlet tank 22 are separated by a partition 23, and the end of the water outlet tank 21 away from the water outlet position and the end of the water inlet tank 22 away from the water inlet position are interconnected. Specifically, a notch is provided at the top of the partition 23, which forms a return channel 24 connecting the water inlet tank 22 and the water outlet tank 21. Liquid in the water inlet tank 22 flows to the water outlet tank 21 through the return channel 24. The structural design of the cooling water tank 20 of the present invention can increase the flow distance of the cooling liquid in the cooling water tank 20, so that the high-temperature liquid can be reused after fully dissipating heat and absorbing heat at the positions of the first heat exchange device and the second heat exchange device.

[0064] In the present invention, the first and second heat exchange devices can utilize the same water-cooling circuit. Specifically, during a single circulation of the cooling liquid, the cooling liquid flows sequentially through the first and second heat exchange devices (or may flow through the second heat exchange device first and then through the first heat exchange device), thereby cooling and storing the coffee liquid in the coffee cup via the first heat exchange device and refrigerating the cold extract via the second heat exchange device. For example, in a first specific embodiment, the heat preservation water-cooling circuit and the cold extract water-cooling circuit are connected in series, and the ends of the series-connected circuits are connected to the water outlet and water inlet of the cooling water tank. In this embodiment, a single water pump is used throughout the entire water-cooling circuit to drive the liquid.

[0065] In the present utility model, the first heat exchange device and the second heat exchange device can also adopt different water cooling circuits, that is, the water cooling circuits adopted by the first heat exchange device and the second heat exchange device are connected in a "parallel" manner. For example, in the second specific embodiment, the heat preservation water cooling circuit is in parallel with the cold extraction water cooling circuit, so that both ends of the heat preservation water cooling circuit are connected to the water outlet interface and the water inlet interface of the cooling water tank 20, and both ends of the cold extraction water cooling circuit are connected to the water outlet interface 25 and the water inlet interface 26 of the cooling water tank 20. In this embodiment, a first water pump 64 for driving the liquid circulation is provided on the heat preservation water cooling circuit, and the first water pump 64 is connected to the motor PCB board 93; a second water pump 801 for driving the liquid circulation is provided on the cold extraction water cooling circuit where the second heat exchange device (including the third heat exchange device) is located, and the second water pump 801 is connected to the motor PCB board 93.

[0066] In the second specific embodiment, taking the second heat exchange device and the third heat exchange device as an example, each component is connected through pipelines: the water outlet interface 25 of the cooling water tank 20 is connected to the first water pump 64 through the first pipeline 401, the water outlet end of the first water pump 64 is connected to the first heat exchange component 63 in the first heat exchange device through the second pipeline 402, and the water outlet end of the first heat exchange component 63 is connected to the water inlet interface 26 of the cooling water tank 20 through the third pipeline 403; the water outlet interface 25 of the cooling water tank 20 is also connected to the second water pump 801 through the fourth pipeline 404, the water outlet end of the second water pump 801 is connected to the second heat exchange component 75 in the second heat exchange device through the fifth pipeline 405, the water outlet end of the second heat exchange component 75 is connected to the second heat exchange component 75 in the third heat exchange device through the sixth pipeline 406, and the water outlet end of this second heat exchange component 75 is connected to the water inlet interface 26 of the cooling water tank 20 through the seventh pipeline 407.

[0067] In this embodiment, the coolant passes through the second heat exchange device 70 and the third heat exchange device 80 in sequence and then returns to the cooling water tank 20, while the drinking water passes through the third heat exchange device 80 and the second heat exchange device 70 in sequence and then enters the extraction assembly 50, so that the flow direction of the coolant in the second heat exchange device 70 and the third heat exchange device 80 is opposite to the flow direction of the drinking water in the second heat exchange device 70 and the third heat exchange device 80, enabling the drinking water to be fully cooled during the refrigeration process and achieving sufficient heat dissipation for the second refrigeration sheet 74 in the second heat exchange device 70 and the third heat exchange device 80. In other embodiments, the flow direction of the coolant in the second heat exchange device 70 and the third heat exchange device 80 can also 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.

[0068] The utility model uses a heat-insulating water-cooling circuit and a cold extraction water-cooling circuit where the second heat exchange device (including the second heat exchange device 70 and the third heat exchange device 80) is located for water-cooling to effectively dissipate the heat of the first and second thermoelectric coolers. On the one hand, the two thermoelectric coolers can be used for more efficient refrigeration during the preparation and storage of cold brew coffee to ensure the taste of the coffee. On the other hand, the water-cooling circuit can be used to achieve rapid heat dissipation without causing noise in the entire coffee machine, improving the user experience.

[0069] In addition, through the structural design of the first heat exchange device and the second heat exchange device, the utility model makes the integration of the cooling and temperature reduction structure in the entire coffee cup higher. This is not only beneficial to the production and assembly of the coffee cup but also can fully reduce the volume occupied by the heat exchange device in the coffee machine, realizing a miniaturized design.

[0070] During the extraction process, the second heat exchange device cools the liquid in the extraction water circuit to reach the extraction temperature. Specifically, first determine the extraction temperature, and control the second thermoelectric cooler to cool the liquid flowing through the refrigeration component according to the extraction temperature, so that the liquid in the extraction water circuit reaches the required temperature. During this process, use a temperature sensor to detect the temperature of the liquid in the extraction water circuit in real time, and realize the closed-loop control of the temperature of the second thermoelectric cooler through the closed-loop circuit in the main PCB board.

[0071] The motor PCB board drives the liquid in the cold extraction water-cooling circuit flowing through the second heat exchange component to circulate through the second water pump, so as to exchange heat with the second thermoelectric cooler through the second heat exchange component. This heat exchange process can be carried out simultaneously with the extraction cooling process or successively, and can be specifically set according to requirements.

[0072] During the collection and storage of coffee liquid, the first heat exchange device cools the coffee cup on the cup holder assembly to reach the storage temperature. Specifically, first determine the coffee liquid collection and storage temperature, and based on this temperature, control the first thermoelectric cooler to cool the bottom support piece in the cup holder assembly, so that the coffee liquid in the coffee cup on the bottom support piece is stabilized at the required temperature. During this process, use a temperature sensor to detect the temperature of the coffee liquid in the coffee cup in real time, or use a temperature sensor to detect the temperature of the bottom support piece to represent the temperature of the coffee liquid, and after obtaining this temperature, realize the closed-loop control of the temperature of the first thermoelectric cooler through the control system of the main PCB board.

[0073] The motor PCB board drives the liquid in the heat-insulating water-cooling circuit flowing through the first heat exchange component to circulate through the first water pump, so as to exchange heat with the first thermoelectric cooler through the first heat exchange component. This heat exchange process can be carried out simultaneously with the coffee liquid storage cooling process or successively, and can be specifically set according to requirements.

[0074] Preferably, in the above two water cooling cycles, each water pump is an adjustable-speed water pump. By detecting the hot-end temperatures of the first and second cooling fins, the flow rate of each water pump is adjusted to meet different heat dissipation and cooling requirements.

[0075] It should be understood that those of ordinary skill in the art can make improvements or modifications according to the above description, and all such improvements and modifications shall fall within the protection scope of the appended claims of the present utility model.

[0076] The above has described the patent of the present utility model by way of example in conjunction with the accompanying drawings. Obviously, the implementation of the patent of the present utility model is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the patent of the present utility model, or the concept and technical solution of the patent of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A silent cold brew coffee machine, including a machine base, characterized in that, An extraction assembly connected to the extraction water path is provided on the machine base. The extraction water path is connected to one or more second heat exchange devices, which are used to cool down the liquid in the extraction water path by heat exchange, and the heat after heat exchange is dissipated by water cooling. The second heat exchange device includes a second Peltier element and a cold extraction water cooling loop. The cold end of the second Peltier element exchanges heat with the extraction water path, and the hot end of the second Peltier element is connected to the cold extraction water cooling loop and exchanges heat with the cold extraction water cooling loop.

2. The silent cold brew coffee machine according to claim 1, wherein, The second heat exchange device further includes a refrigeration component. The extraction water path passes through the refrigeration component, and the refrigeration component is connected to the cold end of the second Peltier element for cooling down the liquid in the extraction water path through the second Peltier element.

3. The silent cold brew coffee machine according to claim 2, wherein A second heat exchange component is provided on the cold extraction water cooling loop. The second heat exchange component is connected to the hot end of the second Peltier element for absorbing the heat of the second Peltier element.

4. The silent cold brew coffee machine according to claim 3, characterized in that, The second heat exchange device further includes a first heat exchange bracket and a second heat exchange bracket. The first heat exchange bracket is located on the periphery of the refrigeration component, and the second heat exchange bracket is located on the periphery of the second heat exchange component. The first heat exchange bracket and the second heat exchange bracket are assembled and fixed.

5. The silent cold brew coffee machine according to claim 1, characterized in that, A cup holder assembly including a first heat exchange device is further provided on the machine base. The first heat exchange device is used to cool down the coffee cup on the cup holder assembly by heat exchange, and the heat after heat exchange is dissipated by water cooling.

6. The silent cold brew coffee machine according to claim 5, wherein The first heat exchange device includes a first Peltier element. The cold end of the first Peltier element is connected to the bottom support piece of the cup holder assembly for cooling down the bottom support piece through the first Peltier element, and its hot end is connected to the heat preservation water cooling loop.

7. The silent cold brew coffee machine according to claim 6, characterized in that A first heat exchange component is provided on the heat preservation water cooling loop. The first heat exchange component is connected to the hot end of the first Peltier element for absorbing the heat of the first Peltier element.

8. The silent cold brew coffee machine according to claim 6, wherein, A cooling water tank is provided on the machine base. The heat preservation water cooling loop is connected in series with the cold extraction water cooling loop, and both ends of the loop are connected to the water outlet interface and the water inlet interface of the cooling water tank.

9. The silent cold brew coffee machine according to claim 6, characterized in that, A cooling water tank is provided on the machine base. The heat preservation water cooling loop is connected in parallel with the cold extraction water cooling loop, so that both ends of the heat preservation water cooling loop are connected to the water outlet interface and the water inlet interface of the cooling water tank, and both ends of the cold extraction water cooling loop are connected to the water outlet interface and the water inlet interface of the cooling water tank.

10. The silent cold brew coffee machine according to claim 8 or 9, characterized in that, The cooling water tank includes a water outlet tank and a water inlet tank. The water outlet tank is connected to the cold water inlets of the heat preservation water cooling loop and the cold extraction water cooling loop, and the water inlet tank is connected to the hot water outlets of the heat preservation water cooling loop and the cold extraction water cooling loop.

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