Cold brew coffee making device and cold brew coffee making method

Abstract

The present invention discloses a cold quenching coffee making device, including a device body, a semiconductor refrigeration plate and a refrigeration cavity are arranged inside the device body, a refrigeration conductor is arranged inside the refrigeration cavity, the semiconductor refrigeration plate is connected to the refrigeration conductor, the refrigeration cavity is provided with a low-temperature drip valve, and the low-temperature drip valve and the semiconductor refrigeration plate are temperature-controlled and linked to open and close. A method for making cold quenching coffee is also disclosed. The cold quenching coffee making device is fully automated and does not require supervision. It can make cold quenching coffee simply and quickly, with a short time and convenient operation, and the cold quenching coffee has a good taste; the semiconductor refrigeration plate is used to make zero-degree ice water, which can be automatically controlled; the design of the low-temperature drip valve not only reduces the cost but also reduces the size of the device, which is convenient for carrying; the opening and closing control of the low-temperature drip valve is achieved by adjusting and controlling the forward and reverse directions of the electrodes of the semiconductor refrigeration plate, thereby ensuring the cold quenching effect and cold quenching taste.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee machines, and in particular to a cold brew coffee making device and a cold brew coffee making method. Background Art

[0002] With the continuous promotion of coffee drinks, consumers have begun to develop a strong interest in homemade coffee. Especially driven by the rise of milk tea drinks, iced coffee has also begun to be loved by young consumers in recent years. But as we all know, the production process of iced coffee is very time-consuming, because it requires placing ice cubes on top of ground coffee powder, and using the zero-degree ice water produced by the natural melting of ice cubes to extract the essence of coffee drop by drop. This means that a cup of homemade cold brew coffee generally takes more than a few hours, and sometimes even requires adding ice cubes in the middle, which is very inconvenient.

[0003] A Chinese patent document (publication date: February 7, 2020, publication number: CN 110754944A) discloses a small coffee cold brew machine that is convenient for adjusting extraction conditions, including a main body box, which is a stable box with a cavity inside; the thermal insulation cabinet is fixedly installed in the main body box, the driving device is arranged in the main body box, the output end of the driving device is connected to a tray through a transmission shaft, the collecting cup is a cup with an opening at the top, and the water inlet of the drip pipe is arranged outside the main body box. The device is small in size and suitable for home use, and the processed amount is just suitable for family drinking. The taste adjustment is more free and flexible, and the extraction method can also be adjusted according to needs, making the extraction of iced coffee more convenient and meeting the different taste and taste needs of different people. The device breaks the limitations of traditional iced coffee extraction equipment and brings more changes and operation space to the production method of iced coffee.

[0004] Although the above technical solution discloses a coffee extraction machine, it controls the state of coffee powder extraction by controlling the speed of ice water flowing into the drip pipe through a flow regulating valve, and when in use, it is necessary to make ice externally to achieve the purpose of coffee extraction. This operation is complicated and time-consuming, which brings great inconvenience to the user. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of existing cold brew coffee, such as complex operation, time-consuming, inconvenient use, the need to prepare cold water in advance, or to make ice coffee by adding ice cubes to coffee, resulting in poor taste, and to provide a cold brew coffee making device and a cold brew coffee making method that can automatically control the rapid preparation of zero-degree ice water and realize cold brewing of coffee by opening a temperature control valve, which is easy to operate, takes a short time, is easy to make, does not require additional preparation of ice water, has a small size and is low in cost.

[0006] The technical solution adopted by the present invention to achieve the first invention purpose is: a cold brew coffee making device, including a device body, a semiconductor refrigeration sheet and a refrigeration cavity are arranged inside the device body, a refrigeration conductor is arranged inside the refrigeration cavity, the semiconductor refrigeration sheet is connected to the refrigeration conductor, the refrigeration cavity is provided with a low-temperature drip valve, and the low-temperature drip valve is temperature-controlled and linked to the semiconductor refrigeration sheet. The cold brew coffee making device directly makes zero-degree ice water through a semiconductor production sheet, and at the same time, by setting a low-temperature drip valve and using its high cold shrinkage rate to realize linkage opening with the semiconductor refrigeration sheet, thereby realizing rapid production of ice water, and the low-temperature drip valve controls the cold extraction of coffee powder, thereby finally making cold brew coffee. Since the semiconductor production sheet can realize automatic control and fast cooling speed, the cold amount of the semiconductor production sheet is transferred to the liquid in the refrigeration cavity through the refrigeration conductor, realizing rapid production of ice water, and no ice cubes need to be made in advance or externally for cold extraction, which greatly improves the production of cold brew coffee, and the cold brew coffee tastes more fresh and pure. Due to the innovative structure of the control valve, a low-temperature drip valve is used, and the low-temperature drip valve is opened by controlling the low-temperature contraction, that is, the low-temperature drip valve is opened in conjunction with the semiconductor refrigeration plate. When the temperature of the liquid in the refrigeration chamber drops to zero degrees, the low-temperature drip valve opens to achieve drip extraction of coffee powder. When the cold-brewed coffee is made, the liquid in the refrigeration chamber is heated by reverse control of the semiconductor refrigeration plate electrode, thereby achieving thermal expansion and closure of the low-temperature drip valve. Moreover, the low-temperature drip valve is small in size and low in cost, so the entire cold-brewed coffee making device can be set to be portable. The cold-brewed coffee making device does not require the use of external ice cubes and is unattended throughout the process. It can make cold-brewed coffee simply and quickly, with a short time and convenient operation, and the cold-brewed coffee has a good taste.

[0007] Preferably, the semiconductor refrigeration plate includes a cold surface and a hot surface, and the semiconductor refrigeration plate realizes the adjustment of the electrodes to control the orientation of the cold surface and the hot surface through a control board. The semiconductor refrigeration plate is provided with a cold surface and a hot surface. During the normal cold extraction process, the cold surface faces one side of the refrigeration chamber and transfers the cold to the refrigeration chamber, and the hot surface faces the heat dissipation side to dissipate heat outward. When the cold extraction is completed and the low-temperature drip valve needs to be closed, the control board controls the electrode of the semiconductor refrigeration plate to be reversed, that is, the cold surface becomes the hot surface, transfers heat to the refrigeration chamber, heats the liquid inside the refrigeration chamber, and heats the liquid to room temperature, thereby realizing the closure of the low-temperature drip valve.

[0008] Preferably, the low-temperature drip valve includes a low-temperature flexible valve core, and the low-temperature flexible valve core is provided with a structural margin; the shrinkage rate of the low-temperature flexible valve core is greater than or equal to the structural margin. The low-temperature drip valve is provided with a low-temperature flexible valve core, and the low-temperature flexible valve core is set to a high shrinkage rate, and its shrinkage rate is greater than or equal to the structural margin. The setting of this structure makes the low-temperature flexible valve core closed in a natural state, and even if there is liquid pressure on the low-temperature valve core, the low-temperature flexible valve core cannot be opened under the action of liquid pressure due to the setting of the structural margin. However, when the low-temperature flexible valve core contacts the low-temperature liquid, the high shrinkage rate causes the low-temperature flexible valve core to shrink in a large proportion, and at the same time, under the action of liquid pressure, the low-temperature flexible valve core opens to achieve drip extraction of coffee powder. When the liquid temperature returns to room temperature, the low-temperature flexible valve core expands and returns to a closed state. This temperature-controlled linkage opening and closing structure between the semiconductor refrigeration plate greatly simplifies the operating steps, and no manual supervision is required during use, realizing automatic and rapid production of cold brewed coffee.

[0009] Preferably, a water cavity is provided inside the device body above the refrigeration cavity, the water cavity is provided with a dripping port connected to the refrigeration cavity, and a dripping valve is provided on the dripping port; the dripping valve includes a flexible valve core, and the flexible valve core is a pressure-opening structure. In order to realize the full automation of cold brew coffee, a water cavity is provided inside the device body above the refrigeration cavity. When in use, pure water is injected into the water cavity, and the power is turned on, and the cold brew coffee can be automatically made. In order to realize the rapid cooling of the liquid inside the refrigeration cavity, preferably, a dripping port is provided between the water cavity and the refrigeration cavity, and a dripping valve is provided on the dripping port. The dripping valve includes a flexible valve core, and the flexible valve core is opened by liquid pressure, that is, the flexible valve core of the dripping valve is closed in a natural state. When there is liquid gravity above it, the flexible valve core is opened, and the liquid can flow into the refrigeration cavity through the flexible valve core. When the cavity of the refrigeration cavity below the flexible valve core is filled with liquid, the pressure above and below the flexible valve core is balanced, and the flexible valve core enters a closed state, and the liquid inside the refrigeration cavity can be quickly cooled by the semiconductor refrigeration plate. This structure greatly saves energy, realizes rapid cooling of liquid, and continuous cold extraction of coffee powder, greatly saving production time.

[0010] Preferably, a heat dissipation cavity is further provided inside the main body of the device, the semiconductor cooling sheet is provided inside the heat dissipation cavity, and a heat dissipation component is provided inside the heat dissipation cavity. Since the hot surface of the semiconductor cooling sheet generates heat during the cooling process, the semiconductor cooling sheet is provided inside the heat dissipation cavity, and the heat is dissipated through the heat dissipation component, thereby ensuring the cooling effect and the service life of the device.

[0011] Preferably, the heat dissipation component includes a radiator and a heat dissipation fan, the radiator is attached to the semiconductor cooling sheet, a group of heat dissipation holes are provided on the device body corresponding to the radiator, and an air outlet is provided corresponding to the heat dissipation fan. The heat dissipation component preferably includes radiators and heat dissipation fans of different specifications, and the overall volume of the device can be arbitrarily controlled on the premise of meeting the heat dissipation needs, so as to meet the design needs of different occasions, such as portable, home, office, etc.

[0012] As a preferred embodiment, a bottom cover is also included, wherein a controller and a power supply are arranged inside the bottom cover, and a control switch connecting the controller and the power supply is arranged on the bottom cover; a cold extraction drip port is arranged at the bottom of the bottom cover, and the low-temperature drip valve is arranged on the cold extraction drip port; and a semiconductor refrigeration plate electrode reverse control program and a cold extraction time control program are arranged in the controller. In order to facilitate the cold extraction of coffee powder, the setting of the controller, the control board, the power supply and the control shape, etc., the connection between the cup body and the device body is also provided with a bottom cover, and the controller and the power supply can be arranged in isolation inside the bottom cover to realize the control of the semiconductor refrigeration plate, the radiator, the cooling fan, etc. At the same time, in order to realize the production of fully enclosed cold extraction coffee, the bottom cover is sealed with the cup body. When in use, the coffee powder is placed on the filter net inside the cup body, and the drip extraction is realized through the low-temperature drip valve. Through the setting of the cold extraction time control program and the setting of the semiconductor refrigeration plate electrode reverse control program, the production of cold extraction coffee can be completed within the set time. The whole process does not need to be supervised, and the production of cold extraction coffee is realized automatically.

[0013] Preferably, a cup assembly is further included, wherein a filter screen is disposed inside the cup assembly; the cup assembly includes an outer cup; or the cup assembly includes an outer cup and a dripping screen; or the cup assembly includes an outer cup, an inner cup, a base, a drive motor disposed inside the base, and a turntable driven by the drive motor, wherein the inner cup is disposed on the turntable. The cup assembly can be provided with a variety of structures according to different specifications and functional requirements.

[0014] The technical solution adopted by the present invention to achieve the second invention object is: a method for making cold brew coffee using a cold brew coffee making device, comprising the following steps:

[0015] Step 1: Inject pure water into the water cavity, and the pure water enters the micro refrigeration cavity through the drip valve;

[0016] Step 2: Make zero-degree ice water: Turn on the power, the control panel starts the refrigeration function of the semiconductor refrigeration chip, the cold energy generated by the semiconductor refrigeration chip is transferred to the refrigeration conductor, and the refrigeration conductor continuously outputs low temperature to cool the water inside the refrigeration chamber. After the pure water absorbs part of the cold energy on the refrigeration conductor and condenses into ice, the temperature of the mixed liquid in the micro refrigeration chamber reaches zero degrees, and zero-degree ice water is made;

[0017] Step 3: Drip brewing to make cold brew coffee: When zero-degree ice water is formed in the micro-refrigeration chamber, the low-temperature drip valve shrinks when it encounters cold, and the low-temperature flexible valve core shrinks greatly. At the same time, under the action of liquid pressure, the low-temperature drip valve opens, and the ice water drips onto the coffee powder on the filter screen inside the cup body, thereby cold brewing the coffee powder;

[0018] Step 4: The low-temperature drip valve is closed to complete the preparation of cold brew coffee.

[0019] The method for making cold brew coffee is convenient and quick to operate, has a short preparation time, does not require supervision during the entire process, realizes fully automated preparation of cold brew coffee, and the prepared cold brew coffee has a good taste and high purity.

[0020] Preferably, the step of closing the low-temperature drip valve includes the following steps: when the cold extraction process reaches the set time, the reverse control program of the semiconductor refrigeration plate electrode on the control board works, and the control board reversely supplies power to the semiconductor refrigeration plate to exchange the cold surface and the hot surface of the semiconductor refrigeration plate, and heat the cold surface of the semiconductor refrigeration plate to quickly heat the liquid inside the refrigeration chamber to room temperature, and the low-temperature flexible valve core of the low-temperature drip valve expands when heated and quickly closes.

[0021] The beneficial effects of the present invention are as follows: the cold brew coffee making device does not require the use of external ice cubes, is fully automatically controlled, and does not require supervision. It can make cold brew coffee simply and quickly, takes a short time, is easy to operate, and the cold brew coffee has a good taste; a semiconductor refrigeration sheet is used to make zero-degree ice water, which can be automatically controlled; the design of the low-temperature drip valve not only reduces the cost but also reduces the size of the device, which is convenient for carrying; the opening and closing control of the low-temperature drip valve is achieved by adjusting and controlling the forward and reverse directions of the electrodes of the semiconductor refrigeration sheet, thereby ensuring the cold brew effect and the cold brew taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a cold brew coffee making device of the present invention;

[0023] Figure 2 It is a schematic diagram of an exploded structure of the cold brew coffee making device of the present invention;

[0024] Figure 3 It is a cross-sectional structural diagram of the cold brew coffee making device of the present invention;

[0025] Figure 4It is a structural schematic diagram of the main body of the device in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the drip valve in the natural state of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the drip valve in the present invention when it is in an open state;

[0028] Figure 7 It is a structural schematic diagram of the drip valve in the present invention in a balanced state;

[0029] Figure 8 It is a structural schematic diagram of a refrigeration conductor in the present invention;

[0030] Fig. 9 It is a structural schematic diagram of a semiconductor refrigeration sheet in the present invention;

[0031] Fig.10 It is a structural schematic diagram of the low-temperature drip valve in the present invention in a natural and normal temperature state;

[0032] Fig.11 It is a structural schematic diagram of the low-temperature drip valve of the present invention in a low-temperature and open state;

[0033] Fig.12 is a structural schematic diagram of a cold brew coffee making device in embodiment 2 of the present invention;

[0034] Fig.13 is a structural schematic diagram of a cold brew coffee making device in embodiment 4 of the present invention;

[0035] In the figure: 1. device body, 2. bottom cover, 3. water cavity, 4. installation cavity, 5. isolation body, 6. drip port, 7. drip valve, 8. flexible valve core, 9. opening, 10. partition plate, 11. refrigeration cavity, 12. heat dissipation cavity, 13. air outlet, 14. heat dissipation hole, 15. installation port, 16. diversion cavity, 17. control cavity, 18. sealing partition, 19. cold extraction drip port, 20. low temperature drip valve, 21. low temperature flexible valve core, 22. structural margin , 23. Refrigeration conductor, 24. Semiconductor refrigeration plate, 25. Cold surface, 26. Hot surface, 27. Conducting body, 28. Conducting plate, 29. Conducting cavity, 30. Radiator, 31. Cooling fan, 32. Control board, 33. Control switch, 34. Coffee powder, 35. Cup body assembly, 36. Filter, 37. Outer cup body, 38. Inner cup body, 39. Base, 40. Turntable, 41. Drive motor, 42. Multi-channel water filter cover, 43. Cold brew net. DETAILED DESCRIPTION

[0036] The various aspects of the present invention are described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0037] Embodiment 1:

[0038] exist Figure 1 , Figure 2 , Figure 3 In the embodiment shown, a cold brew coffee making device includes a device body 1 and a bottom cover 2 arranged at the lower end of the device body 1, a semiconductor cooling plate 24 and a cooling chamber 11 are arranged inside the device body 1, a cooling conductor 23 is arranged inside the cooling chamber 11, the semiconductor cooling plate 24 is connected to the cooling conductor 23, and the cooling chamber 11 is provided with a low-temperature drip valve 20, and the low-temperature drip valve 20 is opened and closed in a temperature-controlled linkage with the semiconductor cooling plate 24. The semiconductor cooling plate 24 realizes electrode adjustment through a control board 32.

[0039] A water cavity 3 and an installation cavity 4 are arranged inside the device body 1, an isolating body 5 is arranged between the water cavity 3 and the installation cavity 4, a dripping port 6 is arranged on the isolating body 5, and a drip valve 7 is installed on the dripping port 6.

[0040] like Figure 5 As shown, the drip valve 7 includes a flexible valve core 8, and the flexible valve core 7 is a pressure-opening structure. The flexible valve core 8 is in a closed state in a natural state, such as Figure 6 As shown, when there is liquid gravity above it, the flexible valve core 8 is opened and liquid can flow through. Figure 7 As shown, when the cavity of the refrigeration cavity 11 below the drip valve 7 is filled with liquid, the pressure above and below the flexible valve core 8 is balanced, and the flexible valve core 8 enters a closed state. The flexible valve core 8 can be made of silicone material, or can be made of rubber material, or can be made of other materials that can make a flexible valve core, as long as flexible control is achieved. In this embodiment, the flexible valve core 8 is made of silicone material. The flexible valve core 8 is arranged in a split structure, that is, the flexible valve core is arranged in half with the center line as the symmetry line, and an opening 9 is arranged on the flexible valve core 8. In the natural state, the opening 9 of the split valve core is closed because the two halves of the valve core are in a closed state. When pure water is injected into the water cavity, the flexible valve core 8 is opened downward under the gravity of the liquid, and the opening 9 is in an open state, and the liquid will drip through the opening 9. Since the flexible valve core 8 is opened by the gravity of the liquid, when it is set, the closing force of the flexible valve core 8 is less than the gravity of the liquid in the water cavity, so as to facilitate the opening of the flexible valve core.

[0041] like Figure 4As shown, the installation cavity 4 is separated into a micro refrigeration cavity 11 and a heat dissipation cavity 12 by a partition plate 10, and the device body 1 where the heat dissipation cavity 12 is located is symmetrically provided with an air outlet 13 and a group of heat dissipation holes 14. The partition plate 10 is provided with an installation port 15. The micro refrigeration cavity 11 can be used to achieve rapid refrigeration through a semiconductor refrigeration plate. When the water inside the micro refrigeration cavity is filled, the pressure above and below the flexible valve core, that is, the water cavity and the refrigeration cavity are balanced, and the flexible valve core is closed. At this time, the water inside the refrigeration cavity can be quickly cooled by the semiconductor refrigeration plate to produce zero-degree ice water.

[0042] A guide cavity 16 and a control cavity 17 are provided inside the bottom cover 2, a sealing partition 18 is provided between the guide cavity 16 and the control cavity 17, a cold extraction dripping port 19 is provided at the bottom of the guide cavity 16, and a low-temperature dripping valve 20 is provided on the cold extraction dripping port 19.

[0043] like Fig.10 As shown, the low-temperature drip valve 20 includes a low-temperature flexible valve core 21. The low-temperature flexible valve core 21 has a high shrinkage rate. The low-temperature flexible valve core 21 has a high shrinkage rate at a low temperature of zero degrees. The low-temperature flexible valve core 21 is in a closed state in a natural state. The low-temperature flexible valve core 21 is in a split structure with two half valve cores. A structural margin 22 is provided between the two half valve cores and an inclined structure is abutted and sealed. A triangular structure is formed between the structural margin and the horizontal plane. The shrinkage rate of the low-temperature flexible valve core is greater than or equal to the structural margin 22 of the flexible valve core. Even if there is a certain pressure above the low-temperature flexible valve core 21, the low-temperature flexible valve core cannot be opened due to the existence of the structural margin 22. As shown Fig.11 As shown, when the low temperature flexible valve core 21 contacts the low temperature liquid, the high shrinkage rate causes the low temperature flexible valve core to shrink in a large proportion, and at the same time, under the action of the liquid pressure, the low temperature flexible valve core 21 is opened. When the liquid temperature returns to normal temperature, the low temperature flexible valve core 21 returns to the closed state.

[0044] A refrigeration assembly is arranged inside the refrigeration cavity 11, and the refrigeration assembly includes a refrigeration conductor 23 and a semiconductor refrigeration sheet 24. The refrigeration conductor 23 is embedded in the mounting opening 15 on the partition plate 10 and is arranged inside the refrigeration cavity. Fig. 9 As shown, the semiconductor refrigeration plate includes a cold surface 25 and a hot surface 26. The semiconductor refrigeration plate 24 adjusts the electrodes through the control board 32 to control the orientation of the cold surface 25 and the hot surface 26. The semiconductor refrigeration plate 24 is arranged in the heat dissipation cavity close to the partition plate. During normal refrigeration, the cold surface 25 of the semiconductor refrigeration plate 24 faces the refrigeration cavity 11, and the hot surface 26 of the semiconductor refrigeration plate 24 faces the heat dissipation cavity 12. When the low-temperature drip valve needs to be closed, the control board controls the electrodes of the semiconductor refrigeration plate to reversely supply power. At this time, the cold surface becomes the hot surface to heat the liquid in the refrigeration cavity.

[0045] like Figure 8 As shown, the cooling conductor 23 includes a conducting body 27 and a plurality of conducting sheets 28. The conducting body 27 is embedded in the mounting opening 15 and fits the cold surface of the semiconductor sheet 24. The plurality of conducting sheets 28 are evenly distributed on the other side of the conducting body 27. The conducting sheets 28 are arranged in a vertical direction, and a conducting cavity 29 in a vertical direction is formed between adjacent conducting sheets 28.

[0046] A heat dissipation component is arranged inside the heat dissipation cavity 12, and the heat dissipation component includes a radiator 30 and a heat dissipation fan 31. The radiator 30 is in contact with the hot surface 26 of the semiconductor cooling plate 24, and the heat dissipation fan 31 is arranged on the other side of the radiator 30 and facing the air outlet 13. The two sides of the radiator 30 are respectively arranged facing the heat dissipation holes 14.

[0047] A controller and a power supply connected to a power supply are arranged inside the control cavity of the bottom cover 2. The controller is respectively connected to the radiator 30, the cooling fan 31 and the semiconductor cooling sheet 24. The controller includes a control board 32, and a control switch 33 electrically connected to the controller is also arranged on the bottom cover. The control board 32 is provided with a semiconductor cooling sheet electrode reverse control program and a cold extraction time control program. The semiconductor cooling sheet electrode reverse control program is used to control the electrode adjustment of the semiconductor cooling sheet, thereby realizing the control of the low-temperature drip valve. When used specifically, the cold extraction time control program controls the cold extraction time. For example, the cold extraction time is set to 2 hours. When the set time is reached, the controller sends a control signal to stop the cold extraction. At this time, the semiconductor cooling sheet electrode reverse control program controls the semiconductor production sheet to reversely heat, thereby heating the liquid inside the refrigeration cavity. When the liquid temperature reaches room temperature, the low-temperature drip valve undergoes thermal expansion, thereby achieving the purpose of quickly closing the low-temperature drip valve.

[0048] The cup body assembly 35 is also included, which is connected to the bottom cover 2 . A filter screen 36 is disposed inside the cup body assembly 35 , and coffee powder 34 is placed on the filter screen 36 .

[0049] In order to achieve automatic control and eliminate the need for full supervision, the volume of the water cavity inside the device body 1 is larger than the volume of the micro refrigeration cavity, and the volume of the cup body assembly, that is, the volume of the cup body or the volume of the inner cup body, is larger than the volume of the water cavity. Under normal circumstances, the controller controls the dripping time to control the opening time of the low-temperature drip valve, thereby controlling the concentration of the produced cold brew coffee to meet the taste requirements of different consumers.

[0050] When in use, pure water is injected into the water cavity. The gravity of the liquid causes the drip valve to open, and the pure water enters the micro refrigeration cavity through the drip valve. The refrigeration conductor installed in the refrigeration cavity transfers the cold generated by the semiconductor refrigeration chip to the pure water in the refrigeration cavity to make ice quickly. While the semiconductor refrigeration chip is cooling, the heat generated on the other side is dissipated to the external environment through the air outlet on the device body by the radiator and the cooling fan. At the same time, the zero-degree ice water generated in the refrigeration cavity causes the low-temperature and low-humidity valve to shrink and open. After passing through the low-temperature drip valve, the zero-degree ice water drips onto the coffee powder on the filter in the cup body. After extraction, the cold-brewed coffee is collected in the cup body.

[0051] The specific method of making cold brew coffee is as follows:

[0052] Step 1: pure water is injected into the water cavity, and the pure water enters the micro refrigeration cavity through the drip valve; since the drip valve is provided with a flexible valve core of a pressure-opening structure, when pure water is injected into the water cavity, the flexible valve core is opened under the action of liquid gravity, and the pure water enters the refrigeration cavity through the flexible valve core; when the refrigeration cavity is filled with pure water, since the pressure inside the refrigeration cavity and the water cavity reaches a stable state, at this time, the flexible valve core is closed under the action of the balanced pressure;

[0053] Step 2: Make zero-degree ice water: Turn on the power, the controller works, and the control board starts the refrigeration function of the semiconductor refrigeration plate. The cold energy generated by the semiconductor refrigeration plate is transferred to the refrigeration conductor through the cold surface. At this time, the refrigeration conductor continuously outputs low temperature to cool the water inside the refrigeration chamber. The heat generated by the hot surface of the semiconductor refrigeration plate is transferred to the radiator. The radiator continues to be high temperature. The high temperature is dissipated to the external environment through the cooling fan and the air outlet on the device body; when the pure water in the micro refrigeration chamber absorbs part of the cold energy on the refrigeration conductor and condenses into ice, the temperature of the mixed liquid in the micro refrigeration chamber can reach zero degrees, thereby making zero-degree low water;

[0054] Step 3: Drip brewing to make cold brew coffee: When zero-degree ice water is formed inside the refrigeration chamber, the low-temperature drip valve shrinks when it encounters cold, that is, the low-temperature flexible valve core shrinks significantly. Since the shrinkage amount of the low-temperature drip valve is equal to or less than the structural margin of the low-temperature drip valve, when the low-temperature flexible valve core shrinks significantly, the structural margin is reduced to zero or less than zero. At the same time, under the action of the zero-degree ice water liquid pressure, the low-temperature drip valve opens, and the ice water drips onto the coffee powder on the filter screen inside the cup body, thereby cold brewing the coffee powder.

[0055] Step 4: The low-temperature drip valve is closed, and the production of cold brew coffee is completed. When the cold brew process reaches the set time, the semiconductor refrigeration plate electrode reverse control program on the control board works, and the control board reversely supplies power to the semiconductor refrigeration plate, so that the cold surface and the hot surface of the semiconductor refrigeration plate are exchanged, and the cold surface of the semiconductor refrigeration plate is heated, thereby heating the liquid retained in the refrigeration chamber, so that the liquid is quickly heated to room temperature, and the low-temperature flexible valve core of the low-temperature drip valve expands when heated, recovering the structural margin, and the low-temperature flexible valve core is quickly closed, achieving the purpose of quickly closing the low-temperature drip valve.

[0056] Embodiment 2:

[0057] exist Fig.12 In the embodiment shown, the technical scheme is basically the same as that of the embodiment 1, except that: the cup assembly 35 includes an outer cup 37, an inner cup 38 and a base 39, the upper part of the outer cup 37 is sealed and connected to the bottom cover 2, which can be a snap connection or a threaded connection, the inner cup 38 is movably sleeved inside the outer cup 37, and the filter 36 is arranged inside the inner cup 38. A turntable 40 is arranged inside the base 39, and the turntable 40 is driven to rotate by a drive motor 41 connected to the controller signal. In this embodiment, the drive motor adopts a micro motor to reduce its occupied space, thereby realizing the volume of the entire device. The inner cup 38 is arranged on the turntable 40 of the base, and is driven to rotate by the turntable 40, so that the coffee powder inside the inner cup 38 can continuously change its position, so as to realize the uniform dripping of the coffee powder. A card slot is arranged on the base 39 outside the turntable 40, and the lower end of the outer cup 37 is inserted into the card slot and fixed.

[0058] In this embodiment, during the process of making cold brew coffee, in step 3, in order to ensure that the coffee powder can be evenly drip-extracted during the cold brewing process, the drive motor in the base is started at the same time during the cold brewing process, and the inner cup body and the coffee powder inside it are driven to rotate through the turntable to change the position of the cold brewing and achieve uniform cold brewing of the coffee powder.

[0059] Embodiment 3:

[0060] exist Figure 2 In the embodiment shown, the technical scheme is basically the same as that of embodiment 1, except that: a multi-channel water filter cover 42 is also provided on the device body 1, and the purified water is injected into the water cavity through the multi-channel water filter cover 42. The multi-channel water filter cover 42 is integrally provided with the device body 1 or separately provided. When separately provided, the multi-channel water filter cover 42 is snap-fitted or threadedly connected with the device body 1. In this embodiment, the multi-channel water filter cover 42 is integrally provided with the device body 1.

[0061] Embodiment 4:

[0062] exist Fig.13In the embodiment shown, the technical scheme is basically the same as that of embodiment 1, except that: a cold extraction net 43 is also provided on the cup body assembly above the filter net 36, and the mesh of the cold extraction net 43 is less than 100 meshes. The cold extraction net 43 is tilted, and the side facing the low-temperature drip valve 20 is higher than the side away from the low-temperature drip valve 20. When in use, after placing the coffee powder on the filter net 36, the cold extraction net 43 is provided above it, and the zero-degree ice water dripping through the low-temperature drip valve 20 first drips onto the cold extraction net 43 and can flow, slide or roll along the tilt direction of the cold extraction net 43, and then is divided into a number of small droplets through the mesh on the cold extraction net 43 and drips onto as much coffee powder as possible, so as to achieve uniform cold extraction of the coffee powder, thereby achieving a better cold extraction effect.

[0063] The cold brew coffee making device in the above embodiment can be set to the size of a single cup of coffee or the size of multiple cups of coffee, and can be designed according to different applicable occasions to meet the design requirements of different models such as personal portable, home use, office use, etc.

[0064] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the inventive concept. The protection scope of the inventive type should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the inventive type also extends to the equivalent technical means that can be thought of by those skilled in the art based on the inventive type concept.

Claims

1. A cold brew coffee making device, characterized in that: The invention comprises a device body (1), wherein a semiconductor refrigeration sheet (24) and a refrigeration chamber (11) are arranged inside the device body (1), a refrigeration conductor (23) is arranged inside the refrigeration chamber (11), the semiconductor refrigeration sheet (24) is connected to the refrigeration conductor (23), a low-temperature drip valve (20) is arranged on the refrigeration chamber (11), and the low-temperature drip valve (20) and the semiconductor refrigeration sheet (24) are opened and closed in a temperature-controlled linkage manner; a water chamber (3) is arranged inside the device body (1) above the refrigeration chamber (11); The low-temperature drip valve (20) comprises a low-temperature flexible valve core (21), wherein the low-temperature flexible valve core (21) is provided with two half valve cores in a split-type structure, a structural margin (22) is provided between the two half valve cores, and the two half valve cores are abutted and sealed in an inclined structure; when the temperature of the liquid in the refrigeration chamber drops to zero degrees, the low-temperature drip valve opens; by reversely controlling the electrodes of the semiconductor refrigeration plate, the temperature of the liquid in the refrigeration chamber is increased, and the low-temperature drip valve is closed due to thermal expansion; and the cup body assembly (35) is also provided with a filter screen (36) inside.

2. The cold brew coffee making device according to claim 1, characterized in that: The semiconductor cooling plate (24) comprises a cold surface (25) and a hot surface (26). The semiconductor cooling plate (24) controls the orientation of the cold surface (25) and the hot surface (26) by adjusting the electrodes through a control board (32).

3. The cold brew coffee making device according to claim 2, characterized in that: The shrinkage rate of the low-temperature flexible valve core (21) is greater than or equal to the structural margin (22).

4. The cold brew coffee making device according to any one of claims 1 to 3, characterized in that: The water cavity (3) is provided with a dripping port (6) connected to the refrigeration cavity (11), and a dripping valve (7) is provided on the dripping port (6); the dripping valve (7) comprises a flexible valve core (8), and the flexible valve core (8) is a pressure-opening structure.

5. The cold brew coffee making device according to any one of claims 1 to 3, characterized in that: A heat dissipation cavity (12) is also provided inside the device body (1), the semiconductor cooling plate (24) is provided inside the heat dissipation cavity (12), and a heat dissipation component is provided inside the heat dissipation cavity (12).

6. The cold brew coffee making device according to claim 5, characterized in that: The heat dissipation component comprises a radiator (30) and a heat dissipation fan (31); the radiator (30) is bonded to a semiconductor cooling sheet (24); a group of heat dissipation holes (14) are provided on the device body (1) corresponding to the radiator (30); and an air outlet (13) is provided corresponding to the heat dissipation fan (31).

7. The cold brew coffee making device according to any one of claims 1 to 3, characterized in that: The invention also comprises a bottom cover (2), wherein a controller and a power supply are arranged inside the bottom cover (2), and a control switch (33) connected to the controller and the power supply is arranged on the bottom cover (2); a cold extraction dripping port (19) is arranged at the bottom of the bottom cover (2), and the low-temperature dripping valve (20) is arranged on the cold extraction dripping port (19); and a semiconductor refrigeration plate electrode reverse control program and a cold extraction time control program are arranged in the controller.

8. The cold brew coffee making device according to any one of claims 1 to 3, characterized in that: The cup body assembly (35) includes an outer cup body (37); or the cup body assembly (35) includes an outer cup body (37) and a cold brew net (43); or the cup body assembly (35) includes an outer cup body (37), an inner cup body (38), a base (39), a drive motor (41) disposed inside the base (39), and a turntable (40) driven to rotate by the drive motor (41), and the inner cup body (38) is disposed on the turntable (40).

9. A method for making cold brew coffee using the cold brew coffee making device according to claim 2, characterized in that The following steps are involved: Step 1: Pour pure water into the water cavity, and the pure water enters the refrigeration cavity through the drip valve; Step 2: Make zero-degree ice water: Turn on the power, the control panel starts the refrigeration function of the semiconductor refrigeration chip, the cold energy generated by the semiconductor refrigeration chip is transferred to the refrigeration conductor, and the refrigeration conductor continuously outputs low temperature to cool the water inside the refrigeration chamber. After the pure water absorbs part of the cold energy on the refrigeration conductor and condenses into ice, the temperature of the mixed liquid in the refrigeration chamber reaches zero degrees, and zero-degree ice water is made; Step 3: Drip brewing to make cold brew coffee: When zero-degree ice water is formed in the refrigeration chamber, the low-temperature flexible valve core in the low-temperature drip valve shrinks greatly. At the same time, under the action of liquid pressure, the low-temperature drip valve opens, and the ice water drips onto the coffee powder on the filter inside the cup body, thereby cold brewing the coffee powder; Step 4: The low-temperature drip valve is closed to complete the preparation of cold brew coffee.

10. The method for making cold brew coffee according to claim 9, characterized in that: In step 4, closing the low-temperature drip valve includes the following steps: when the cold extraction process reaches the set time, the reverse control program of the semiconductor refrigeration plate electrode on the control board works, and the control board reversely supplies power to the semiconductor refrigeration plate to exchange the cold surface and the hot surface of the semiconductor refrigeration plate, and heat the cold surface of the semiconductor refrigeration plate to quickly heat the liquid inside the refrigeration chamber to room temperature, and the low-temperature flexible valve core of the low-temperature drip valve expands when heated and quickly closes.

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