Coffee machine refrigeration system and control method thereof

Abstract

The application discloses a coffee machine refrigeration system and a control method thereof, relates to the technical field of coffee preparation, and aims to solve the technical problem that the temperature of coffee liquid cannot be finely controlled by the existing coffee machine refrigeration system. The system comprises a coffee preparation module, the coffee preparation module is connected with a cooling module, the cooling module is connected with a refrigeration module, the cooling module comprises a heat exchanger and a cold water tank connected with a cooling outlet of the heat exchanger, one end of the cold water tank is provided with and connected with a three-way valve, and a cooling inlet of the heat exchanger is connected with the three-way valve. The refrigeration module comprises a compressor, the compressor is connected with a condenser, the condenser is connected with a filtering throttling device, and the filtering throttling device is connected with a plate heat exchanger. The system of the application realizes efficient cooling of hot coffee and effectively reduces the preparation interval time of each cup of coffee.

Description

Technical Field

[0001] This invention relates to the field of coffee preparation technology, specifically to a coffee machine refrigeration system and its control method. Background Technology

[0002] Most existing coffee machines only produce hot coffee, while a few can make cold coffee. Generally, this involves cooling the hot coffee by exchanging heat with cold water. The conventional method is to directly circulate the hot coffee into the cold water tank for cooling, which is inefficient and often results in long brewing intervals and the coffee gradually heating up when multiple cups are brewed simultaneously, negatively impacting the user experience.

[0003] Chinese patent CN118021149A discloses a coffee cooling device, coffee machine, and coffee cooling method. The coffee cooling device includes a water tank module, a water circulation module, and a refrigeration module. During coffee making, a compressor is activated to generate a second cooling medium, and simultaneously, a condenser is activated to cool the second cooling medium, allowing the low-temperature second cooling medium to enter the refrigeration pipe. Then, a heat exchanger and a circulating water pump are activated, allowing a first cooling medium to enter the water tank body from the inlet pipe, thus achieving circulation between the heat exchanger and the water tank body. The second cooling medium and the first cooling medium exchange heat inside the heat exchanger, allowing the second cooling medium to continuously cool the first cooling medium. Coffee liquid is poured in through a first inlet, allowing the coffee liquid to enter the first heat dissipation pipe, where the first cooling medium cools the coffee liquid. This solution uses a low-temperature refrigerant to cool the water in the water tank, and then uses the cooled water to cool the coffee liquid. The drawback of this solution is that it cannot precisely control the temperature of the coffee liquid; after multiple coffee making cycles, the water tank temperature rises, causing the coffee liquid temperature to gradually increase. Summary of the Invention

[0004] To address the technical problem that existing coffee machine refrigeration systems cannot precisely control the temperature of coffee liquid, this invention proposes a coffee machine refrigeration system that achieves efficient cooling of hot coffee and effectively reduces the brewing interval for each cup of coffee. This invention also proposes a control method for the coffee machine refrigeration system, which achieves uniform coffee temperature through corresponding logic control strategies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a coffee refrigeration system, comprising a coffee making module, wherein the coffee making module is connected to a cooling module, the cooling module is connected to a refrigeration module, the cooling module includes a heat exchanger and a cold water tank connected to the cooling outlet of the heat exchanger, one end of the cold water tank is provided with and connected to a three-way valve, and the cooling inlet of the heat exchanger is connected to the three-way valve; the refrigeration module includes a compressor, wherein the compressor is connected to a condenser, the condenser is connected to a filter throttling device, and the filter throttling device is connected to a plate heat exchanger.

[0006] This technical solution mainly includes a coffee making module, a cooling module, and a refrigeration module. The coffee making module is connected to the cooling module, and the cooling module is connected to the refrigeration module. Through the synergistic effect of the coffee making module, the cooling module, and the refrigeration module, the hot coffee is cooled efficiently, effectively reducing the brewing time of each cup of coffee and ensuring the temperature uniformity of each cup of coffee, thus bringing a better user experience.

[0007] Furthermore, a circulating water pump is provided between the inlet of the three-way valve and the cooling outlet of the plate heat exchanger. The first outlet of the three-way valve is connected to the water inlet on one side of the cold water tank, and the second outlet of the three-way valve is connected to the cooling inlet of the heat exchanger.

[0008] In this technical solution.

[0009] Furthermore, one end of the cold water tank is connected to the cooling inlet of the plate heat exchanger, the cooling outlet of the plate heat exchanger is connected to a circulating water pump, and the circulating water pump is connected to the inlet of a three-way valve.

[0010] Furthermore, the filtration and throttling device includes a drying filter and a capillary tube connected to the drying filter. The inlet of the drying filter is connected to a condenser, the outlet of the capillary tube is connected to the refrigeration inlet of a plate heat exchanger, and the refrigeration outlet of the plate heat exchanger is connected to a compressor.

[0011] Furthermore, the coffee making module includes an extraction device, which is also connected to a heating device. The heating device is connected to a water tank and includes a heater and an instant heat pump connected to the heater.

[0012] Furthermore, the extraction device is connected to a coffee outlet via a heat exchanger.

[0013] Furthermore, a first temperature acquisition device is installed inside the cold water tank, and a second temperature acquisition device is installed between the cooling inlet of the heat exchanger and the second outlet of the three-way valve. Both the first and second temperature acquisition devices are connected to a control module.

[0014] A control method for a coffee machine refrigeration system, applicable to the aforementioned coffee machine refrigeration system, includes the following steps: When in hot coffee mode, the cooling module and the refrigeration module stop working. The water heated by the heating device of the coffee making module is used to extract coffee in the extraction device to make hot coffee. When in cold coffee mode, the system detects the first temperature T1 in the cold water tank and determines whether T1 is less than the first threshold t1. If so, it opens the three-way valve to connect its inlet and the second outlet, and starts the compressor and the circulating water pump. If not, it opens the three-way valve to connect its inlet and the first outlet, and starts the compressor and the circulating water pump to lower the water temperature in the tank.

[0015] The method of this technical solution can be specifically controlled according to the demand pattern of hot and cold coffee. By adjusting the setting values ​​of t1 and t2, coffee at different temperatures can be produced, greatly improving the user experience.

[0016] Furthermore, after opening the three-way valve to connect its inlet and second outlet, it is determined whether the second temperature T2 obtained by the second temperature acquisition device between the cooling inlet of the heat exchanger and the second outlet of the three-way valve is less than the first threshold t2. If so, the coffee making module is activated to make coffee, and the compressor is adjusted to the lowest speed; otherwise, the coffee making is completed.

[0017] Furthermore, the first temperature is obtained by a first temperature acquisition device installed inside the cold water tank.

[0018] The present invention can bring the following beneficial effects: The present invention provides a coffee refrigeration system that achieves efficient cooling of hot coffee through the coordinated action of a coffee making module, a cooling module, and a refrigeration module. This effectively reduces the brewing interval of each cup of coffee and ensures the temperature uniformity of each cup, providing users with a better user experience. The present invention discloses a control method for a coffee machine refrigeration system. By detecting the temperature T1 of the cold water tank and determining its relationship with t1, the connection path of the three-way valve is automatically selected to ensure that the system can efficiently refrigerate or pre-cool in cold coffee mode, while shutting down the refrigeration and cooling modules in hot coffee mode to avoid energy waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a coffee machine refrigeration system according to the present invention.

[0020] Figure 2 This is a flowchart of a control method for a coffee machine refrigeration system according to the present invention.

[0021] Figure reference numerals: 1. Water tank; 2. Instantaneous heat pump; 3. Heater; 4. Extraction device; 5. Cold water tank; 6. Compressor; 7. Condenser; 8. Dryer filter; 9. Capillary tube; 10. Plate heat exchanger; 11. Circulating water pump; 12. Three-way valve; 13. Heat exchanger; 14. Coffee outlet. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] Example 1: Existing coffee machine refrigeration systems have a technical problem: they cannot precisely control the temperature of the coffee liquid, and the temperature of the coffee liquid gradually increases after multiple coffee brewing processes due to the rise in water tank temperature.

[0024] refer to Figure 1 The coffee refrigeration system of this embodiment mainly includes a coffee making module, a cooling module and a refrigeration module. The coffee making module is connected to the cooling module, and the cooling module is connected to the refrigeration module. Through the synergistic effect of the coffee making module, the cooling module and the refrigeration module, the hot coffee can be cooled efficiently.

[0025] The cooling module includes a heat exchanger 13 and a cold water tank 5. The cold water tank 5 is connected to the cooling outlet of the heat exchanger 13. A three-way valve 12 is installed at one end of the cold water tank 5 and is connected to one end of the cold water tank 5. The cooling inlet of the heat exchanger 13 is connected to the three-way valve 12.

[0026] The refrigeration module includes a compressor 6, a condenser 7, a filter throttling device, and a plate heat exchanger 10; wherein, the compressor 6 is connected to the condenser 7, the condenser 7 is connected to the filter throttling device, and the filter throttling device is connected to the plate heat exchanger 10.

[0027] In such Figure 1 In the embodiment shown, a circulating water pump 11 is provided between the inlet of the three-way valve 12 and the cooling outlet of the plate heat exchanger 10. The first outlet of the three-way valve 12 is connected to the water inlet on one side of the cold water tank 5, and the second outlet of the three-way valve 12 is connected to the cooling inlet of the heat exchanger 13.

[0028] More specifically, the three-way valve 12 includes one inlet and two outlets, namely inlet a, first outlet b and second outlet c.

[0029] The inlet a of the three-way valve 12 is connected to the outlet of the circulating water pump 11, the inlet of the circulating water pump 11 is connected to the cooling outlet of the plate heat exchanger 10, the first outlet b of the three-way valve 12 is connected to the water inlet on one side of the cold water tank 5, and the second outlet c of the three-way valve 12 is connected to the cooling inlet of the heat exchanger 13.

[0030] In such Figure 1 In the embodiment shown, one end of the cold water tank 5 is connected to the cooling inlet of the plate heat exchanger 10, the cooling outlet of the plate heat exchanger 10 is connected to the circulating water pump 11, and the circulating water pump 11 is connected to the inlet of the three-way valve 12.

[0031] In such Figure 1 In the illustrated embodiment, the filtration throttling device includes a dryer filter 8 and a capillary tube 9, which are connected together. The inlet of the dryer filter 8 is connected to the outlet of the condenser 7, the outlet of the capillary tube 9 is connected to the refrigeration inlet of the plate heat exchanger 10, and the refrigeration outlet of the plate heat exchanger 10 is connected to the inlet of the compressor 6.

[0032] Continue to refer to Figure 1, the coffee preparation module includes an extraction device 4, a heating device and a water tank 1; wherein the heating device is connected to the water tank 1.

[0033] In the embodiment shown in Figure 1 the heating device includes a heater 3 and an instant heat pump 2, and the instant heat pump 2 is connected to the heater 3.

[0034] Of course, the heating device may also be other heating equipment or a combination of heating equipment, which is not limited herein.

[0035] In the embodiment shown in Figure 1 the extraction device 4 is connected to the coffee outlet 14 through a heat exchanger 13. The prepared coffee can flow through the heat exchanger 13 and flow out through the coffee outlet.

[0036] A first temperature acquisition device is arranged in the cold water tank 5; specifically, the first temperature acquisition device is arranged inside the cold water tank 5.

[0037] In the embodiment shown in Figure 1 the first temperature acquisition device includes but is not limited to a temperature sensor and an NTC probe. The function of the first temperature acquisition device is to collect the water temperature in the cold water tank 5 in real time or periodically to obtain a first temperature T1, for the control module to judge whether T1<t1 is true, so as to determine the direction of the three-way valve and the on-off state of the compressor 6 and the circulating water pump 11.

[0038] A second temperature acquisition device is arranged between the cooling inlet of the heat exchanger 13 and the second outlet of the three-way valve 12.

[0039] In the embodiment shown in Figure 1 the second temperature acquisition device also includes but is not limited to a temperature sensor and an NTC probe. The function of the second temperature acquisition device is to collect the second temperature T2 at the cooling inlet of the heat exchanger 13 in real time or periodically, for the subsequent control module to judge whether T2<t2 is true, so as to determine whether to adjust the compressor to the minimum rotating speed.

[0040] Both the first temperature acquisition device and the second temperature acquisition device are connected to the control module.

[0041] Both the first temperature acquisition device and the second temperature acquisition device can transmit the collected temperature data (i.e. the first temperature and the second temperature) to the control module.

[0042] As a preferred embodiment, after the collected temperature data is sent to the control module, the temperature data is preferentially preprocessed, some clearly abnormal data are screened and removed, and the removed abnormal data is replaced by a corresponding replacement algorithm.

[0043] In a preferred embodiment, the control module mainly includes a first judgment unit and a second judgment unit. The first judgment unit stores a first threshold t1, and the second judgment unit stores a second threshold t2. Both the first threshold t1 and the second threshold t2 can be adjusted according to the actual situation.

[0044] In the first judgment unit, the first temperature collected can be compared with the first threshold t1 for judgment, and the direction of the subsequent three-way valve and the opening and closing of the compressor 6 and the circulating water pump 11 are determined according to the judgment result.

[0045] In the second judgment unit, the acquired second temperature can be compared with the second threshold t2 for judgment, and the judgment result determines whether to adjust the compressor to the lowest speed.

[0046] The system in this embodiment achieves efficient cooling of hot coffee through the coordinated action of the coffee making module, cooling module, and refrigeration module, effectively reducing the brewing interval of each cup of coffee and ensuring the temperature uniformity of each cup of coffee, thus providing users with a better user experience.

[0047] In this embodiment, the medium inside the system is cooling water, but it can also be other liquid working fluids. Correspondingly, t1 and t2 can be adjusted according to the change of the liquid working fluid.

[0048] In this embodiment, in order to avoid the T2 temperature being too low, in addition to adjusting the speed of the compressor, the flow rate of the circulating water pump can also be adjusted.

[0049] The technical solution in this embodiment is applicable not only to coffee machines, but also to the refrigeration and preparation of juices and other beverages.

[0050] This embodiment also proposes a control method for a coffee machine refrigeration system, referencing... Figure 2 This includes the following steps.

[0051] When in hot coffee mode, the cooling module and the refrigeration module stop working. Water heated by the heating device of the coffee making module is used to extract coffee in the extraction device to make hot coffee.

[0052] When in cold coffee mode, the system detects the first temperature T1 in the cold water tank and determines whether T1 is less than the first threshold t1. If so, it opens the three-way valve to connect its inlet and the second outlet, and starts the compressor and the circulating water pump. If not, it opens the three-way valve to connect its inlet and the first outlet, and starts the compressor and the circulating water pump to lower the water temperature in the tank.

[0053] After opening the three-way valve to connect its inlet and second outlet, determine whether the second temperature T2 is less than the first threshold t2. If so, start the coffee making module to make coffee, and adjust the compressor to the lowest speed to prevent the cooling water from freezing and damaging the pipeline. If not, the coffee making is complete.

[0054] The first temperature is obtained by a first temperature acquisition device installed inside the cold water tank.

[0055] The second temperature is obtained through a second temperature acquisition device located between the cooling inlet of the heat exchanger and the second outlet of the three-way valve.

[0056] The technical solution of this embodiment has two functions: making hot and cold coffee. By adjusting the setting values ​​of t1 and t2, coffee at different temperatures can be made, greatly improving the user experience.

[0057] The technical solution in this embodiment can effectively ensure the temperature uniformity of each cup of coffee by controlling the water temperature in the cold water tank.

[0058] The technical solution in this embodiment stores the cooling energy generated by the compressor using cooling water. Compared with the compressor directly cooling the coffee machine, this can effectively reduce the start-stop interval of the compressor and improve the reliability of the compressor.

[0059] The technical solution in this embodiment uses a cooling water medium to exchange heat with hot coffee through a heat exchanger, instead of adding low-temperature water or ice directly to the coffee. Therefore, it does not have a significant impact on the taste of the coffee.

[0060] Example 2: Most existing coffee machines only produce hot coffee, while a few can make cold coffee. Generally, this involves cooling the hot coffee by exchanging heat with cold water. The conventional method is to directly circulate the hot coffee into the cold water tank for cooling, which is inefficient and often results in long brewing intervals and the coffee gradually becoming too hot when multiple cups are brewed simultaneously, negatively impacting the user experience.

[0061] To address the technical problems existing in current coffee machines, this embodiment proposes a coffee machine cooling system. The system mainly includes a coffee making module, a cooling module, and a refrigeration module. The coffee making module is connected to the cooling module, and the cooling module is connected to the refrigeration module. Through the synergistic effect of the coffee making module, the cooling module, and the refrigeration module, efficient cooling of hot coffee can be achieved.

[0062] The cooling module includes a heat exchanger 13 and a cold water tank 5. The cold water tank 5 is connected to the cooling outlet of the heat exchanger 13. A three-way valve 12 is installed at one end of the cold water tank 5 and is connected to one end of the cold water tank 5. The cooling inlet of the heat exchanger 13 is connected to the three-way valve 12.

[0063] The refrigeration module includes a compressor 6, a condenser 7, a filter throttling device, and a plate heat exchanger 10; wherein, the compressor 6 is connected to the condenser 7, the condenser 7 is connected to the filter throttling device, and the filter throttling device is connected to the plate heat exchanger 10.

[0064] In such Figure 1 In the embodiment shown, a circulating water pump 11 is provided between the inlet of the three-way valve 12 and the cooling outlet of the plate heat exchanger 10. The first outlet of the three-way valve 12 is connected to the water inlet on one side of the cold water tank 5, and the second outlet of the three-way valve 12 is connected to the cooling inlet of the heat exchanger 13.

[0065] More specifically, the three-way valve 12 includes one inlet and two outlets, namely inlet a, first outlet b and second outlet c.

[0066] The inlet a of the three-way valve 12 is connected to the outlet of the circulating water pump 11, the inlet of the circulating water pump 11 is connected to the cooling outlet of the plate heat exchanger 10, the first outlet b of the three-way valve 12 is connected to the water inlet on one side of the cold water tank 5, and the second outlet c of the three-way valve 12 is connected to the cooling inlet of the heat exchanger 13.

[0067] In such Figure 1 In the embodiment shown, one end of the cold water tank 5 is connected to the cooling inlet of the plate heat exchanger 10, the cooling outlet of the plate heat exchanger 10 is connected to the circulating water pump 11, and the circulating water pump 11 is connected to the inlet of the three-way valve 12.

[0068] In such Figure 1 In the illustrated embodiment, the filtration throttling device includes a dryer filter 8 and a capillary tube 9, which are connected together. The inlet of the dryer filter 8 is connected to the outlet of the condenser 7, the outlet of the capillary tube 9 is connected to the refrigeration inlet of the plate heat exchanger 10, and the refrigeration outlet of the plate heat exchanger 10 is connected to the inlet of the compressor 6.

[0069] Continue to refer to Figure 1 The coffee making module includes an extraction device 4, a heating device, and a water tank 1; wherein the heating device is connected to the water tank 1.

[0070] In such Figure 1 In the embodiment shown, the heating device includes a heater 3 and a heat pump 2, wherein the heat pump 2 is connected to the heater 3.

[0071] Of course, the heating device can also be other heating equipment or a combination of heating equipment, and there are no restrictions here.

[0072] In such Figure 1 In the illustrated embodiment, the extraction device 4 is connected to the coffee outlet 14 via a heat exchanger 13. The brewed coffee flows through the heat exchanger 13 and exits through the coffee outlet.

[0073] A first temperature acquisition device is arranged in the cold water tank 5; specifically, the first temperature acquisition device is disposed inside the cold water tank 5.

[0074] In the embodiment shown in Figure 1 , the first temperature acquisition device includes but is not limited to a temperature sensor and an NTC probe. The function of the first temperature acquisition device is to collect the water temperature in the cold water tank 5 in real time or periodically to obtain a first temperature T1, for the control module to judge whether T1<t1 is true, so as to determine the direction of the three-way valve and the on / off state of the compressor 6 and the circulating water pump 11.

[0075] A second temperature acquisition device is arranged between the cooling inlet of the heat exchanger 13 and the second outlet of the three-way valve 12.

[0076] In the embodiment shown in Figure 1 , the second temperature acquisition device also includes but is not limited to a temperature sensor and an NTC probe. The function of the second temperature acquisition device is to collect the second temperature T2 at the cooling inlet of the heat exchanger 13 in real time or periodically, for the subsequent control module to judge whether T2<t2 is true, so as to determine whether to adjust the compressor to the minimum rotation speed.

[0077] Both the first temperature acquisition device and the second temperature acquisition device are connected to the control module.

[0078] Both the first temperature acquisition device and the second temperature acquisition device can transmit the collected temperature data (i.e., the first temperature and the second temperature) to the control module.

[0079] As a preferred embodiment, after the collected temperature data is sent to the control module, the temperature data is preferentially preprocessed, some clearly abnormal data is screened and removed, and the removed abnormal data is replaced by a corresponding replacement algorithm.

[0080] As a preferred embodiment, the control module mainly includes a first judgment unit and a second judgment unit. A first threshold t1 is stored in the first judgment unit, a second threshold t2 is stored in the second judgment unit, and both the first threshold t1 and the second threshold t2 can be adjusted according to actual conditions.

[0081] In the first judgment unit, the collected first temperature can be compared with the first threshold t1 for judgment, and the direction of the subsequent three-way valve as well as the on / off state of the compressor 6 and the circulating water pump 11 are determined according to the judgment result.

[0082] In the second judgment unit, the collected second temperature can be compared with the second threshold t2 for judgment, and whether to adjust the compressor to the minimum rotation speed subsequently is determined according to the judgment result.

[0083] The difference from Example 1 is that this example also includes an outlet temperature acquisition device at the coffee outlet 14.

[0084] In a preferred embodiment, the outlet temperature acquisition device can be a temperature sensor. Specifically, the outlet temperature acquisition device is located between the heat exchanger 13 and the coffee outlet 14, or it can be located on the outlet side of the coffee outlet 14.

[0085] In accordance with the outlet temperature acquisition device, this embodiment also upgrades the control module. In addition to the first and second judgment units, the control module is equipped with a third judgment unit. In the cold coffee mode, the outlet temperature acquisition device detects and obtains the actual outlet temperature T3. The actual outlet temperature T3 is compared with the preset target outlet temperature t3, and the difference between the two is calculated as T4. The speed of the circulating water pump 11 is dynamically adjusted to change the flow rate of water through the heat exchanger 13, thereby fine-tuning the final outlet temperature.

[0086] The third judgment unit and the outlet temperature acquisition device described above in this embodiment can further enable precise fine-tuning of the liquid outlet temperature to adapt to different users' personal preferences for iced coffee temperature.

[0087] In this embodiment, several flow monitoring devices are also installed in the piping of the coffee refrigeration system. Specifically, the flow monitoring devices are installed inside the refrigeration module, the cooling module, and the coffee making module. One or more flow monitoring devices can be installed in each module.

[0088] The flow monitoring device includes, but is not limited to, a flow meter. In a preferred embodiment, two flow monitoring devices are respectively installed inside the refrigeration module, the cooling module, and the coffee making module.

[0089] The flow monitoring device can output the corresponding real-time flow value so that the control module can make adjustments and determine whether to perform cleaning.

[0090] Compatible with the aforementioned flow monitoring device, the control module is equipped with a flow adjustment unit and an execution unit. The flow adjustment unit mainly adjusts the flow inside the module based on the corresponding real-time flow value output. The execution unit can determine whether to clean the internal pipeline of the module based on the cleaning trigger threshold set by the flow adjustment unit. Specifically, the control module can control the three-way valve 12 to switch its inlet and the first and second outlets, and at the same time control the circulating water pump 11 to operate in a pulse mode, using a larger water flow to remove the residue on the inner wall of each module.

[0091] The pulse cleaning mode effectively cleans the dead corners inside the three-way valve and heat exchanger, ensuring hygiene and safety.

[0092] In addition, the plate heat exchanger 10, circulating water pump 11, and three-way valve 12 in this embodiment can be integrated into a separate insulation shell, and the outside of the insulation shell is covered with one or more layers of foamed insulation material.

[0093] The integrated design of plate heat exchanger 10, circulating water pump 11, and three-way valve 12 can effectively reduce cooling loss and ensure long-term system operation.

Claims

1. A coffee machine refrigeration system, characterized in that, The system includes a coffee making module, which is connected to a cooling module, which is connected to a refrigeration module. The cooling module includes a heat exchanger (13) and a cold water tank (5) connected to the cooling outlet of the heat exchanger (13). One end of the cold water tank (5) is provided with and connected to a three-way valve (12), and the cooling inlet of the heat exchanger (13) is connected to the three-way valve (12). The refrigeration module includes a compressor (6), which is connected to a condenser (7). The condenser (7) is connected to a filter throttling device, and the filter throttling device is connected to a plate heat exchanger (10).

2. The coffee machine refrigeration system according to claim 1, characterized in that, A circulating water pump (11) is provided between the inlet of the three-way valve (12) and the cooling outlet of the plate heat exchanger (10). The first outlet of the three-way valve (12) is connected to the water inlet on one side of the cold water tank (5), and the second outlet of the three-way valve (12) is connected to the cooling inlet of the heat exchanger (13).

3. A coffee machine refrigeration system according to claim 1 or 2, characterized in that, One end of the cold water tank (5) is connected to the cooling inlet of the plate heat exchanger (10), and the cooling outlet of the plate heat exchanger (10) is connected to a circulating water pump (11), which is connected to the inlet of a three-way valve (12).

4. A coffee machine refrigeration system according to claim 1 or 2, characterized in that, The filtration and throttling device includes a dryer filter (8) and a capillary tube (9) connected to the dryer filter (8). The inlet of the dryer filter (8) is connected to the condenser (7), the outlet of the capillary tube (9) is connected to the refrigeration inlet of the plate heat exchanger (10), and the refrigeration outlet of the plate heat exchanger (10) is connected to the compressor (6).

5. A coffee machine refrigeration system according to claim 1, characterized in that, The coffee making module includes an extraction device (4), which is also connected to a heating device. The heating device is connected to a water tank (1) and includes a heater (3) and an instant heat pump (2) connected to the heater.

6. A coffee machine refrigeration system according to claim 5, characterized in that, The extraction device (4) is connected to a coffee outlet (14) via a heat exchanger (13).

7. A coffee machine refrigeration system according to claim 2, characterized in that, The cold water tank (5) is equipped with a first temperature acquisition device, and a second temperature acquisition device is provided between the cooling inlet of the heat exchanger (13) and the second outlet of the three-way valve (12). Both the first temperature acquisition device and the second temperature acquisition device are connected to a control module.

8. A control method for a coffee machine refrigeration system, applicable to the coffee machine refrigeration system according to any one of claims 1-7, characterized in that, Includes the following steps: When in hot coffee mode, the cooling module and the refrigeration module stop working. The water heated by the heating device of the coffee making module is used to extract coffee in the extraction device to make hot coffee. When in cold coffee mode, the system detects the first temperature T1 in the cold water tank and determines whether T1 is less than the first threshold t1. If so, it opens the three-way valve to connect its inlet and the second outlet, and starts the compressor and the circulating water pump. If not, it opens the three-way valve to connect its inlet and the first outlet, and starts the compressor and the circulating water pump to lower the water temperature in the tank.

9. The control method for a coffee machine refrigeration system according to claim 8, characterized in that, After opening the three-way valve to connect its inlet and second outlet, determine whether the second temperature T2 obtained by the second temperature acquisition device between the cooling inlet of the heat exchanger and the second outlet of the three-way valve is less than the first threshold t2. If so, start the coffee making module to make coffee and adjust the compressor to the lowest speed; otherwise, complete the coffee making process.

10. The control method for a coffee machine refrigeration system according to claim 8, characterized in that, The first temperature is obtained by a first temperature acquisition device installed inside the cold water tank.

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