Cold brew tea machine

Abstract

The utility model provides a cold-brew tea machine, including a shell, a water cup, a cold-brew pipe, a refrigeration component and a controller located in the shell, the upper chamber of the shell is a cold-brew chamber, the refrigeration component can exchange heat with the water in the cold-brew chamber, the upper end of the cold-brew pipe extends into the shell and communicates with the cold-brew chamber, the lower end of the cold-brew pipe located outside the shell is connected to a tea warehouse, and the top and bottom of the tea warehouse are both provided with a filter screen; the lower shell of the cold-brew pipe is provided with a movable water cup placement part, and the cold-brew pipe can extend into the water cup, a temperature sensor is provided in the cold-brew chamber, and a positive pressure pump and a negative pressure pump are connected to the top of the cold-brew chamber, and the positive pressure pump, the negative pressure pump, the temperature sensor and the refrigeration component are electrically connected to the controller respectively. It can make the tea essence blend well with water to obtain cold-brew tea with the best taste.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a cold-brew tea machine. Background Art

[0002] Cold brewing is a new way of brewing tea. Cold brewing can reduce the release of tea tannins, reduce bitterness when drinking, and increase the taste of tea. Cold brewing tea has a higher body temperature than tea soup, and the ketones with aroma molecules will gradually evaporate after the tea soup reaches the mouth, making it more fragrant and filling the entire mouth, and the throat rhyme is also stronger. Cold brewing can also reduce the caffeine content of tea soup and reduce irritation to the stomach, so it is suitable for people with sensitive constitutions or weak stomachs. Moreover, in cold water, it is less likely to release theophylline, which is the source of bitterness. According to research, the caffeine content is less than three-quarters of that of hot brewing, so it is less harmful to the stomach and less likely to affect sleep. Cold brewing tea has become a healthy drink that more people are pursuing today. Most of the cold brewing on the market uses ice cubes, but ice cubes will melt quickly, and the cold brewing time cannot be achieved. At the same time, it is impossible to control the cold brewing at the same temperature for a long time. Utility Model Content

[0003] In view of the above technical problems, the utility model provides a cold brew tea machine, which can make tea essence blend well with water to obtain cold brew tea with the best taste.

[0004] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is:

[0005] A cold-brew tea machine comprises a shell, a water cup, a cold-brew tube, a refrigeration component and a controller located in the shell, wherein the upper chamber of the shell is a cold-brew chamber, the refrigeration component can exchange heat with the water in the cold-brew chamber, the upper end of the cold-brew tube extends into the shell and is connected to the cold-brew chamber, the lower end of the cold-brew tube located outside the shell is connected to a tea bin, and a filter is provided on the top and bottom of the tea bin; a movable water cup placement piece is provided in the shell below the cold-brew tube, and the cold-brew tube can extend into the water cup, a temperature sensor is provided in the cold-brew chamber, a positive-pressure pump and a negative-pressure pump are connected to the top of the cold-brew chamber, and the positive-pressure pump, the negative-pressure pump, the temperature sensor and the refrigeration component are electrically connected to the controller respectively.

[0006] The shell of the utility model is provided with a first water level probe on the lower surface near the upper end of the cold extraction tube, and a second water level probe is provided in the cold extraction chamber. The first water level probe and the second water level probe are electrically connected to the controller respectively.

[0007] The shell of the utility model is provided with a water injection port at a position corresponding to the water cup, and the switch of the water injection port is controlled by a solenoid valve, and the solenoid valve is electrically connected to a controller.

[0008] The cold extraction tube and the tea bin of the utility model are detachably connected.

[0009] The water cup placement piece of the utility model comprises a placement plate that can be pulled out horizontally and a first slide groove for accommodating the placement plate, and the first slide groove is arranged in the shell.

[0010] A circle of LED lights is arranged inside the placement board of the utility model.

[0011] The refrigeration assembly of the utility model comprises a condenser arranged in the cold extraction chamber and a refrigeration compressor connected to the condenser.

[0012] Preferably, a radiator is provided on the back of the refrigeration compressor.

[0013] Further preferably, the radiator comprises a fin group and a fan, the fin group is arranged facing the refrigeration compressor, and the fan is close to the housing.

[0014] The bottom of the shell of the utility model is provided with a removable tray and a second slide groove for inserting the tray, and the tray is longer than the second slide groove.

[0015] The beneficial effects of the utility model are:

[0016] 1. The present invention arranges a positive pressure pump and a negative pressure pump in the cold extraction chamber to realize the control of alternating operation of the positive pressure pump and the negative pressure pump. Drinking water continuously passes through the tea leaves and enters and exits the cold extraction chamber. During the cold extraction process, the water flow maintains an up-down reciprocating flow between the water cup and the cold extraction chamber. In this continuous low temperature environment, the cooling water will also repeatedly flush the tea leaves up-down, so that the tea essence can be blended with the water to the maximum extent, and the cold extraction tea with the best taste can be obtained.

[0017] 2. This patent adopts positive and negative pressure vacuum pumps. The pump body only generates positive and negative air pressure on the water. The pump body does not circulate water flow and will not pollute the water quality. In addition, applying pressure to the water body can speed up the water flow and promote the fusion of tea leaves and water. Cold extraction can be completed within 1 hour, which significantly speeds up the fusion speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the cold extraction machine of the present utility model.

[0019] Figure 2 Schematic diagram of the structure of the cold extraction machine of Examples 4 and 5.

[0020] Figure 3 This is a schematic diagram of the structure of the cold brew chamber and cup body of Example 2.

[0021] Figure 4 This is a schematic diagram of the structure of the cold brew machine of Example 4 from another angle.

[0022] Figure 5 This is a block diagram of the cold extraction control principle of Example 1.

[0023] Figure 6 This is a block diagram of the cold extraction control principle of Example 2.

[0024] Figure numerals: 1, shell, 2, water cup, 3, cold brew tube, 4, refrigeration component, 5, controller, 6, cold brew chamber, 7, tea warehouse, 8, temperature sensor, 9, positive pressure pump, 10, negative pressure pump, 11, water cup placement, 12, water inlet, 13, power supply, 14, tray, 15, heat sink fin group, 16, fan, 17, first water level probe, 18, second water level probe, 19, LCD display, 71, filter, 111, placement plate, 112, first slide, 113, LED light, 141, second slide. DETAILED DESCRIPTION

[0025] In order to explain the purpose and technical solution of the utility model more clearly and in detail, the utility model is further described below through relevant embodiments. The following embodiments are only for specific explanation of the implementation method of the utility model, and do not limit the protection scope of the utility model.

[0026] Example 1

[0027] A cold brew tea machine comprises a shell 1, a water cup 2, a cold brew tube 3, a refrigeration component 4 and a controller 5 located in the shell 1, wherein the upper chamber of the shell 1 is a cold brew chamber 6, the refrigeration component 4 can exchange heat with the water in the cold brew chamber 6, the upper end of the cold brew tube 3 extends into the shell 1 and is connected with the cold brew chamber 1, the lower end of the cold brew tube 3 located outside the shell 1 is connected with a tea bin 7, and the top and bottom of the tea bin 7 are both provided with a filter screen 71; the shell 1 below the cold brew tube 3 is provided with a movable water cup placement part 11, and the cold brew tube 3 can extend into the water cup 2, a temperature sensor 8 is provided in the cold brew chamber 1, and a positive pressure pump 9 and a negative pressure pump 10 are connected to the top of the cold brew chamber 1, and the positive pressure pump 9, the negative pressure pump 10, the temperature sensor 8 and the refrigeration component 4 are respectively electrically connected to the controller 5.

[0028] The working principle is as follows: first remove the water cup placement piece 11, place the cold brew tube 3 in the water cup 2, and then move the water cup placement piece 11 to the position below the water cup to place the water cup. Water can be filled manually or electrically. The controller 5 gives instructions to the positive pressure pump 9 and the negative pressure pump 10 according to the set time to start alternately at intervals.

[0029] When the negative pressure pump 10 is started, the drinking water passes through the tea bin 5 and the cold brew tube 3 under the action of the negative pressure pump 10, rises to the cold brew chamber 1, the refrigeration component 4 is started, and the water temperature in the cold brew chamber 1 drops rapidly; the negative pressure pump 10 is turned off, and the positive pressure pump 9 is started at the same time, the cooling water passes through the cold brew tube 3 and the tea bin 7, and returns to the water cup 2 again, and the cycle repeats.

[0030] During the cold brewing process, the temperature sensor 8 monitors the temperature in the cold brewing chamber 6 in real time and transmits it to the controller 5. By controlling the switch of the refrigeration component, the cold brewing chamber 6 is kept at a constant low temperature of 4°C. The cold brewing time can be accurately preset. During the long-term alternating operation of the positive pressure pump and the negative pressure pump, the drinking water continuously passes through the tea leaves in and out of the cold brewing chamber. During the cold brewing process, the water flow maintains an up-down reciprocating flow between the water cup and the cold brewing chamber. On the one hand, the water temperature can be quickly cooled to the specified temperature, and the cooling water repeatedly passes through the tea warehouse in this low temperature environment, so that the tea essence can be blended with the water to the maximum extent, and the best-tasting cold brewed tea can be obtained.

[0031] like Figure 5 As shown, the input ends of the refrigeration assembly 4 , the positive pressure pump 9 and the negative pressure pump 10 are connected to the output end of the controller 5 , and the output end of the temperature sensor 8 is connected to the input end of the controller 5 .

[0032] Example 2

[0033] This embodiment is based on embodiment 1:

[0034] The housing 1 is provided with a water inlet 12 at a position corresponding to the water cup 2 . The switch of the water inlet 12 is controlled by a solenoid valve, and the solenoid valve is electrically connected to a controller.

[0035] like Figure 3 As shown, the shell 1 is provided with a first water level probe 17 on the lower surface near the upper end of the cold extraction tube 3, and the cold extraction chamber 6 is provided with a second water level probe 18, and the first water level probe 17 and the second water level probe 18 are electrically connected to the controller 5 respectively.

[0036] The first water level probe and the second water level probe are added to realize the fully automatic control of water injection and cold extraction. The working principle is as follows: open the solenoid valve, inject drinking water into the water cup 2, when the water level rises to the first water level probe 17, send a signal to the controller 5, the solenoid valve is closed, and the water injection is stopped. At the same time, the negative pressure pump 10 is started, and the drinking water passes through the tea bin 7 and the cold extraction tube 3 under the action of the negative pressure pump 10, and rises to the cold extraction chamber 6, the refrigeration component 4 is started, and the water temperature in the cold extraction chamber 6 drops rapidly.

[0037] When the water level in the cold brew chamber 6 rises to the second water level probe 18, a signal is sent to the controller to instruct the negative pressure pump 10 to close, and the positive pressure pump 9 to start at the same time. The cooling water passes through the cold brew tube 3 and the tea bin 7 and returns to the water cup 2 again. When the water level in the water cup 2 rises to the first water level probe 17 again, a signal is sent to the controller to instruct the positive pressure pump to close, and the negative pressure pump to start at the same time, and the cycle repeats.

[0038] like Figure 6As shown, the input ends of the refrigeration assembly 4, the positive pressure pump 9, the negative pressure pump 10 and the solenoid valve are connected to the output end of the controller 5, and the output ends of the first water level probe 17, the second water level probe 18 and the temperature sensor 8 are connected to the input end of the controller 5.

[0039] The water inlet can be connected to a water storage container through a pipe, and can also be connected to an external water dispenser.

[0040] Example 3

[0041] This embodiment is based on embodiment 1:

[0042] The cold brew tube 6 and the tea bin 7 are detachably connected to facilitate replacement of tea leaves or tea powder.

[0043] The connection method can be threaded connection or clamping connection.

[0044] Example 4

[0045] This embodiment is based on Embodiment 2:

[0046] like Figure 2 As shown, the water cup placement member 11 includes a placement plate 111 that can be pulled horizontally and a first slide groove 112 for accommodating the placement plate 111 , and the first slide groove 112 is arranged in the shell 1 .

[0047] like Figure 4 As shown, a circle of LED lights 113 is provided in the placement plate 111, which can flash according to the pressure change rhythm of the positive pressure pump and the negative pressure pump.

[0048] The housing 1 is also provided with a liquid crystal display screen 19, to which an input module can be added to set the cold brewing temperature, time and airflow pressure.

[0049] Example 5

[0050] This embodiment is based on embodiment 1:

[0051] like Figure 2 As shown, the refrigeration assembly 4 includes a condenser 41 arranged in the cold extraction chamber 6 and a refrigeration compressor 42 connected to the condenser 41 .

[0052] The utility model can also adopt other replaceable heat exchange equipment such as semiconductor refrigeration sheets, preferably micro variable frequency compressor refrigeration, which has lower energy consumption than semiconductor refrigeration. The electric energy consumed by semiconductor refrigeration is about 3 times that of compressor refrigeration.

[0053] A radiator is disposed on the back of the refrigeration compressor 42 .

[0054] The radiator includes a fin group 15 and a fan 16. The fin group 15 is arranged facing the refrigeration compressor 42, and the fan 16 is close to the housing.

[0055] The bottom of the housing 1 is provided with a removable tray 14 and a second slide groove 141 for the tray 14 to be inserted into. The tray 14 is longer than the second slide groove 141 .

[0056] The utility model adopts a positive pressure pump of model ZR370-02PM, a negative pressure pump of model ZR520-03PM; a controller of ESB-STM32-PUMP V1.0; a first water level probe and a second water level probe of model M3x50-304, and a temperature sensor of model: NTC 10K.

[0057] The connection not mentioned in the present invention adopts conventional connection methods such as clamping, bonding, riveting, threading, welding or integral molding.

[0058] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A cold brew tea machine, characterized in that: It includes a shell, a water cup, a cold brew tube, a refrigeration component and a controller located in the shell. The upper chamber of the shell is the cold brew chamber. The refrigeration component can exchange heat with the water in the cold brew chamber. The upper end of the cold brew tube extends into the shell and is connected to the cold brew chamber. The lower end of the cold brew tube located outside the shell is connected to a tea bin. The top and bottom of the tea bin are both provided with filter screens. A movable water cup placement piece is provided in the shell below the cold brew tube, and the cold brew tube can be extended into the water cup. A temperature sensor is provided in the cold brew chamber. A positive pressure pump and a negative pressure pump are connected to the top of the cold brew chamber. The positive pressure pump, the negative pressure pump, the temperature sensor and the refrigeration component are electrically connected to the controller respectively.

2. The cold brew tea machine according to claim 1, characterized in that: The shell is provided with a first water level probe on the lower surface near the upper end of the cold extraction tube, and the cold extraction chamber is provided with a second water level probe, and the first water level probe and the second water level probe are electrically connected to the controller respectively.

3. The cold brew tea machine according to claim 1, characterized in that: The shell is provided with a water filling port at a position corresponding to the water cup. The switch of the water filling port is controlled by a solenoid valve, and the solenoid valve is electrically connected to the controller.

4. The cold brew tea machine according to claim 1, characterized in that: The cold extraction tube is detachably connected to the tea bin.

5. The cold brew tea machine according to claim 1, characterized in that: The water cup placement piece includes a placement plate that can be pulled horizontally and a first slide groove for accommodating the placement plate, and the first slide groove is arranged in the shell.

6. The cold brew tea machine according to claim 5, characterized in that: A circle of LED lights is arranged inside the placement plate.

7. The cold brew tea machine according to claim 1, characterized in that: The refrigeration component includes a condenser arranged in the cold extraction chamber and a refrigeration compressor connected to the condenser.

8. The cold brew tea machine according to claim 7, characterized in that: A radiator is arranged on the back of the refrigeration compressor.

9. The cold brew tea machine according to claim 8, characterized in that: The radiator comprises a radiating fin group and a fan. The radiating fin group is arranged facing the refrigeration compressor, and the fan is close to the shell.

10. The cold brew tea machine according to claim 1, characterized in that: A removable tray and a second slide slot for inserting the tray are arranged at the bottom of the shell, and the tray is longer than the second slide slot.

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