Double-throttling refrigeration control device, control method and ice cream and snow melting all-in-one machine

Abstract

The invention relates to the technical field of food processing equipment, in particular to a double-throttling refrigeration control device, a control method and an ice cream snow melting all-in-one machine. The double-throttling refrigeration control device comprises a compressor, a condensing device, a first throttling module, a second throttling module and a material cylinder evaporator; the first throttling module and the second throttling module are arranged between the condensing device and the material cylinder evaporator in parallel through a pipeline, the material cylinder evaporator is arranged in a freezing cylinder, and the first throttling module and the second throttling module are respectively provided with a capillary tube and an electromagnetic valve which correspond to each other. A switchable refrigerating loop is formed through the first throttling module and the second throttling module which are arranged in parallel, accurate adjustment of the evaporation temperature in the snow melting and ice cream making process is achieved, the temperature change curve in the refrigerating cylinder is accurately controlled, the requirement for different refrigerating capacities of different raw materials in different temperature intervals is met, and the refrigerating efficiency is improved. The method has the advantage of improving product quality.

Description

Technical Field

[0001] This invention relates to the field of food processing equipment technology, specifically to a dual-throttling refrigeration control device, control method, and an integrated ice cream melting machine. Background Technology

[0002] Existing integrated snow melting ice cream machines add an ice cream function to a snow melting machine. By utilizing the open material tank of the existing snow melting machine and adding a soft ice cream function mode, the shutdown temperature value of the refrigeration system in the soft ice cream function mode is set lower. Through a longer period of continuous open stirring and cooling, the liquid ice cream mixture is cooled to the target temperature.

[0003] However, there are significant differences in the control process of material state transformation between snowmelt-type beverages and soft-serve ice cream: snowmelt-type beverages need to control the particle size of ice crystal growth to form a semi-frozen state of solid-liquid mixture; soft-serve ice cream needs to achieve ice crystal micronization and aeration emulsification of the syrup to form a semi-liquid oversized emulsion; the two have significant differences in their requirements for the refrigeration capacity of the integrated snowmelt ice cream machine.

[0004] Therefore, current snow melting ice cream machines do not have a multi-temperature differential control scheme for the freezing cylinder. The single refrigeration control method is difficult to accurately control the temperature change curve inside the freezing cylinder, and cannot meet the needs of different raw materials that require different refrigeration capacities in different temperature ranges. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a dual-throttling refrigeration control device and its control method, which has the advantages of improving product quality stability through multi-mode refrigeration schemes and intelligent adjustment.

[0006] This application provides a dual-throttling refrigeration control device, which includes a compressor, a condenser, a first throttling module, a second throttling module, and a feed cylinder evaporator. The first throttling module and the second throttling module are connected in parallel via pipelines between the condenser and the feed cylinder evaporator, which is located inside a freezing cylinder. The compressor, the condenser, the feed cylinder evaporator, and the first and / or second throttling modules form a refrigeration circuit for cooling the freezing cylinder. An agitator is rotatably mounted on the outside of the feed cylinder evaporator, and the agitator is driven by a stirring motor of the freezing cylinder for scraping off the cooled raw material from the outer surface of the feed cylinder evaporator. The first throttling module includes a first solenoid valve and a first capillary tube, wherein the first solenoid valve is used to control the flow of refrigerant in the first capillary tube; the second throttling module includes a second solenoid valve and a second capillary tube, wherein the second solenoid valve is used to control the flow of refrigerant in the second capillary tube.

[0007] Furthermore, this application also proposes that the dual-throttling refrigeration control device includes a first refrigeration mode for snow-melting slurries that require a higher evaporation temperature and a second refrigeration mode for soft-serve ice cream slurries that require rapid cooling and a lower evaporation temperature. In the first refrigeration mode, the compressor, the condensing device, the first throttling module and the feed cylinder evaporator form a refrigeration circuit. When the dual throttling refrigeration control device is started for the first time, the first solenoid valve is opened, the second solenoid valve is closed, and the freezing cylinder stirring motor is turned on and stirred at a relatively high speed. In the second refrigeration mode, the stirring motor of the freezing cylinder is turned on, and the compressor, the condensing device, the first throttling module, the second throttling module and the evaporator of the material cylinder form a refrigeration circuit. When the dual throttling refrigeration control device is turned on for the first time, the first solenoid valve and the second solenoid valve are opened simultaneously, and the stirring motor of the freezing cylinder is turned on and stirs at a low speed.

[0008] Furthermore, this application also proposes that the length of the first capillary be set to 0.3m-2.5m, and the inner diameter of the first capillary be set to 0.3mm-1.2mm; The length of the second capillary is set to 0.6m-3.0m, and the inner diameter of the second capillary is set to 0.4mm-2.0mm.

[0009] Furthermore, this application also proposes that the dual-throttling refrigeration control device further includes a filter, the inlet of which is connected to the outlet of the condenser via a pipeline, and the input ends of the first throttling module and the second throttling module are connected in parallel via pipelines at the outlet of the filter.

[0010] Furthermore, this application also proposes a control method for use in the dual-throttling refrigeration control device as described in any of the above embodiments. The method includes a first refrigeration mode for snow-melting slurries requiring higher evaporation temperatures and a second refrigeration mode for soft-serve ice cream slurries requiring rapid cooling and lower evaporation temperatures. The dual-throttling refrigeration control device includes the following steps: S10. Obtain the real-time material status and the real-time selected operating mode of the freezing cylinder; S20. Control the on / off states of the compressor, the refrigeration cylinder stirring motor, the first solenoid valve, and the second solenoid valve according to the real-time material status and the preset state corresponding to the operating mode.

[0011] Furthermore, this application also proposes that in the first refrigeration mode, the preset state includes a snow melting and molding temperature, and step S20, which controls the on / off states of the compressor, the first solenoid valve, and the second solenoid valve based on the real-time material state and the preset state corresponding to the operating mode, includes the following specific steps: S201. Determine whether the real-time material status matches the snow melting molding temperature; S202. If the real-time material status does not match the snow melting molding temperature, control the compressor to start, the first solenoid valve to open, and re-determine whether the real-time material status matches the snow melting molding temperature after a preset time T1 after the first solenoid valve is opened. S203. If the real-time material status matches the snow melting molding temperature, control the compressor and the first solenoid valve to close, and the freezing cylinder stirring motor to run intermittently. The snow melting molding temperature is set to ≤-1.0℃, and T1 is 1-60min.

[0012] Furthermore, this application also proposes that, in the first refrigeration mode, the preset state further includes a preset viscosity, wherein the preset viscosity is 500-2000 cP; the step S20 of controlling the on / off state of the compressor, the first solenoid valve, and the second solenoid valve according to the real-time material state and the preset state corresponding to the operating mode further includes the following specific steps: S204. After the real-time material state matches the snow melting molding temperature, determine whether the real-time material state matches the preset viscosity. S205. If the real-time material state matches the preset viscosity, the first solenoid valve is closed, and the stirring motor of the freezing cylinder runs intermittently. S206. If the real-time material state does not match the preset viscosity, control the compressor to start, the first solenoid valve to open, and re-determine whether the real-time material state matches the preset viscosity after a preset time T2 when the first solenoid valve is open. T2 is 1-60 min.

[0013] Furthermore, this application also proposes that in the second refrigeration mode, the preset state includes the ice cream emulsification temperature and the ice cream forming temperature, and the step S20, which controls the on / off state of the compressor, the first solenoid valve, and the second solenoid valve according to the real-time material state and the preset state corresponding to the operating mode, includes the following specific steps: S201' Determine whether the real-time material status matches the cream emulsification temperature; S202' If the real-time material state does not match the preset state, control the compressor to start, the first solenoid valve and the second solenoid valve to open, and after the first solenoid valve and the second solenoid valve have been open for a preset time, re-determine whether the real-time material state matches the cream emulsification temperature. S203' If the real-time material state matches the ice cream emulsification temperature, control the first solenoid valve to close, keep the second solenoid valve open, and determine whether the real-time material state matches the ice cream forming temperature after a preset time T3 when the first solenoid valve is closed. The ice cream emulsification temperature is set to ≤0℃, the ice cream forming temperature is set to ≤-5℃, and T3 is 1-60min.

[0014] Furthermore, this application also proposes that in the second refrigeration mode, the preset state further includes a preset viscosity, wherein the preset viscosity is 5000-10000 cP; the step S20 of controlling the on / off state of the compressor, the first solenoid valve, and the second solenoid valve according to the real-time material state and the preset state corresponding to the operating mode further includes the following specific steps: S204' After the real-time material state matches the ice cream forming temperature, determine whether the real-time material state matches the preset viscosity; S205' If the real-time material state matches the preset viscosity, close the second solenoid valve and stop the stirring motor of the freezing cylinder; S206' If the real-time material state does not match the preset viscosity, control the compressor to start, the second solenoid valve to open, and re-determine whether the real-time material state matches the preset viscosity after a preset time T4 when the second solenoid valve is open. T4 is 1-60 min.

[0015] Furthermore, this application also proposes an integrated ice cream melting machine, including a dual-throttling refrigeration control device as described in any of the above-mentioned solutions. The dual-throttling refrigeration control device further includes a machine body, a dispensing head, a sensor assembly, and an electronic control motherboard, wherein the electronic control motherboard is used to control the operation of each component.

[0016] As can be seen from the above, the dual-throttling refrigeration control device and its control method provided in this application solve the problem that existing equipment cannot achieve precise control of multiple temperature ranges and intelligent stirring adjustment by controlling the main board to preset multiple operating modes and adjusting the refrigerant flow and stirring speed in real time, and has the advantage of improving the quality and stability of the finished product.

[0017] This application provides a dual-throttling refrigeration control device, control method, and integrated ice cream melting machine. By forming a switchable refrigeration circuit through a first throttling module and a second throttling module set in parallel, and combining different capillary tube parameter configurations and solenoid valve control strategies, it can achieve precise adjustment of evaporation temperature during melting and ice cream making. This solves the technical problem that traditional equipment is difficult to accurately control the temperature change curve in the freezing cylinder and cannot meet the different refrigeration capacity requirements of different raw materials in different temperature ranges. It has the advantages of improving product quality and expanding the application range of the integrated ice cream melting machine. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram illustrating the principle of the dual-throttling refrigeration control device of the present invention. Figure 2 A flowchart illustrating the control method of the present invention; Figure 3 A schematic diagram illustrating the process of the present invention in a first refrigeration mode; Figure 4 This is a flowchart illustrating the sub-steps of step S20 in the first refrigeration mode of the present invention. Figure 5 A schematic diagram illustrating the process of the present invention in a second refrigeration mode; Figure 6 A flowchart illustrating the sub-steps of step S20 in the second refrigeration mode of the present invention; Figure 7 This is a schematic diagram showing the structure of the ice cream melting machine of the present invention; Figure 8 express Figure 7 A schematic diagram of the local decomposition structure.

[0020] The symbols in the attached image are explained as follows: 1-Compressor; 2-Condensation unit; 3-First throttling module; 31-First control valve; 32-First capillary tube; 4-Second throttling module; 41-First control valve; 42-First capillary tube; 5-Evaporator with feed cylinder; 6-Refrigeration cylinder; 7-A mixer; 8 - Refrigeration cylinder stirring motor; 9-Filter; 10-Machine body; 11-Discharge. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only to represent selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In existing technologies, the snow melting ice cream machine adopts a single refrigeration control method, which makes it difficult to accurately adjust the temperature change curve inside the freezing cylinder 6; traditional equipment cannot adapt to the different evaporation temperature requirements of snow melting and soft ice cream mixtures, resulting in inaccurate control of ice crystal particle size and affecting the taste of the finished product; the open material tank structure is prone to ice layer accumulation during long-term stirring and refrigeration, reducing heat exchange efficiency, and at the same time, it cannot achieve differentiated temperature management for different material phase change stages.

[0024] To address the aforementioned issues, a control device capable of dynamically adjusting the refrigeration intensity based on material type needs to be developed. Traditional single-throttling systems can only provide a fixed evaporation temperature, failing to meet the different temperature profile requirements of slush-melting beverages and soft-serve ice cream. Analysis revealed that refrigerant flow directly affects evaporation temperature, while parallel throttling structures can create different flow cross-sectional areas. Based on this, a combination of dual-path parallel throttling modules is considered, with adjustable refrigeration paths formed by switching via solenoid valves. Simultaneously, the issue of icing on the evaporator surface needs to be addressed by integrating the scraping function into the stirring mechanism to achieve continuous de-icing and material mixing.

[0025] Therefore, please refer to Figure 1 , Figures 7-8 This application proposes a dual-throttling refrigeration control device, including a compressor 1, a condenser 2, a first throttling module 3, a second throttling module 4, and a feed cylinder evaporator 5. The first throttling module 3 and the second throttling module 4 are connected in parallel via pipelines between the condenser 2 and the feed cylinder evaporator 5, which is located inside a freezing cylinder 6. The compressor 1, condenser 2, feed cylinder evaporator 5, and the first throttling module 3 or the second throttling module 4 form a refrigeration circuit for cooling the freezing cylinder 6. An agitator 7 is rotatably mounted on the outside of the feed cylinder evaporator 5, and the agitator 7 is drivenly connected to a freezing cylinder agitator motor 8 for scraping off the cooled raw material from the outer surface of the feed cylinder evaporator 5. The first throttling module 3 includes a first solenoid valve 31 and a first capillary tube 32. The first solenoid valve 31 is used to control the flow of refrigerant in the first capillary tube 32. The second throttling module 4 includes a second solenoid valve 41 and a second capillary tube 42. The second solenoid valve 41 is used to control the flow of refrigerant in the second capillary tube 42.

[0026] Among them, compressor 1 refers to the power device that compresses low-temperature, low-pressure gas into high-temperature, high-pressure gas, providing a power source for the refrigeration cycle; condenser 2 refers to the heat exchange device that converts high-temperature, high-pressure gaseous refrigerant into liquid, which can be implemented using a finned tube heat exchanger, and heat dissipation is achieved through forced air convection; first throttling module 3 refers to a refrigerant flow regulating unit with independent control function, which can be implemented using a solenoid valve and capillary tube in series; second throttling module 4 refers to a refrigerant flow regulating unit with independent control function that is set in parallel with first throttling module 3, which can be implemented using a solenoid valve and capillary tube in series. First throttling module 3 and second throttling module 4 can be implemented by using capillary tubes and solenoid valves of different specifications to form differentiated throttling effects; evaporator 5 refers to the heat exchange component set inside the freezing cylinder 6, which directly contacts the material for heat conduction; stirrer 7 refers to a rotating mechanism with scraping function, which can be implemented using a combination of stainless steel scraper and rotating shaft, and simultaneously removes crystals on the surface of the evaporator while stirring the material.

[0027] Specifically, the refrigeration circuit forms a switchable refrigeration path through two parallel throttling modules. When only the first throttling module 3 is activated, the refrigerant flows through the first capillary tube 32 to generate a higher evaporation temperature, which is suitable for the gradual cooling of snow-melting slurries. When both throttling modules are activated simultaneously, the superimposed capillary structure forms a larger flow cross-sectional area, increasing the refrigerant flow and achieving rapid cooling. After reaching the target temperature, the throttling mode is switched by closing one of the solenoid valves, adjusting the evaporation temperature to meet the needs of different materials. The agitator 7 built into the evaporator 5 continuously scrapes off the surface ice layer during rotation, maintaining heat exchange efficiency while promoting uniform mixing of materials. The combined control method of solenoid valves and capillary tubes allows the system to flexibly switch the refrigeration intensity according to the material type and real-time temperature, achieving precise temperature curve control.

[0028] Through the above technical solutions, this application achieves multi-mode temperature control of the freezing cylinder 6, which can accurately adapt to the different refrigeration requirements of snow melting and ice cream materials; the parallel structure of the dual throttling modules effectively solves the problem that a single refrigeration system cannot adjust the evaporation temperature, and the solenoid valve control method improves the system response speed; the stirrer 7 avoids ice formation on the evaporator surface, ensuring a continuous and efficient heat exchange process; the flexible adjustment capability of the refrigerant flow rate enables the equipment to accurately control the temperature change curve during the phase change process of the material, improving the stability of the finished product quality.

[0029] This application further proposes operating modes including a first refrigeration mode for snow-melting slurries requiring higher evaporation temperatures and a second refrigeration mode for soft-serve ice cream slurries requiring rapid cooling and lower evaporation temperatures. In the first refrigeration mode, the compressor 1, condenser 2, first throttling module 3, and evaporator 5 form a refrigeration circuit. When the dual throttling refrigeration control device is started for the first time, the first solenoid valve 31 opens, the second solenoid valve 41 closes, and the freezing cylinder stirring motor 8 starts and stirs at a relatively high speed. In the second refrigeration mode, the freezing cylinder stirring motor 8 starts, and the compressor 1, condenser 2, first throttling module 3, second throttling module 4, and evaporator 5 form a refrigeration circuit. When the dual throttling refrigeration control device is started for the first time, the first solenoid valve 31 and the second solenoid valve 41 open simultaneously, and the freezing cylinder stirring motor 8 starts and stirs at a lower speed.

[0030] The first refrigeration mode refers to a refrigeration circuit that uses only a single throttling module. Specifically, this can be achieved by closing the second solenoid valve 41 and opening the first solenoid valve 31, using a single capillary tube to limit the refrigerant flow and maintain a higher evaporation temperature. The second refrigeration mode refers to a refrigeration circuit that uses dual throttling modules in parallel. Specifically, this can be achieved by simultaneously opening two solenoid valves, using dual capillary tubes to increase the refrigerant flow and accelerate cooling. Higher speed stirring is used to enhance the heat exchange efficiency of the snow melting slurry. Lower speed stirring is used to reduce shear force to avoid damaging the emulsion structure of the soft ice cream.

[0031] Specifically, in the first refrigeration mode, the second solenoid valve 41 is closed, allowing the refrigerant to flow only through the first capillary tube 32. This results in a lower refrigerant flow rate and a higher evaporation temperature. Combined with the high-speed operation of the agitator 7, this promotes uniform cooling of the slurry and prevents the formation of large ice crystals due to over-freezing of snow-melting slurries. In the second refrigeration mode, both solenoid valves are opened simultaneously, allowing the refrigerant to flow through both capillary tubes at the same time. This increases the total refrigerant flow rate, achieving rapid cooling to the emulsion temperature. Then, the first solenoid valve 31 is closed, leaving only the second capillary tube 42 running. This reduces the refrigerant flow rate to maintain a lower evaporation temperature, while simultaneously reducing the agitation speed to avoid disrupting the stability of the emulsion suspension. The two modes achieve a stepped adjustment of the refrigeration capacity through the combination of opening and closing the solenoid valves. Combined with differentiated control of the agitation speed, this allows the same equipment to adapt to the phase change temperature curves of different materials.

[0032] Through the above technical solution, this application can dynamically adjust the refrigerant flow rate and stirring intensity according to the differences in physical properties between snow-melting and soft-serve ice cream mixtures, so that the refrigeration circuit is in the high evaporation temperature environment required for the snow-melting mixture to maintain a semi-frozen state; or so that the refrigeration circuit is in the step-like cooling process of the ice cream mixture from emulsification to shaping, thus solving the problem that a single refrigeration mode cannot match the needs of multiple temperature ranges.

[0033] This application further proposes that the length of the first capillary 32 is set to 0.3 m to 2.5 m, and the inner diameter of the first capillary 32 is set to 0.4 mm to 2.0 mm; the length of the second capillary 42 is set to 0.6 m to 3.0 m, and the inner diameter of the second capillary 42 is set to 0.3 mm to 1.2 mm.

[0034] The length of the first capillary tube 32 refers to the physical extension of the throttling channel used in the refrigeration mode of snow-melting slurry. Specifically, it can be achieved by bending copper or alloy tubes. A shorter length can reduce flow resistance and form a fast flow path with a larger inner diameter to match the higher evaporation temperature requirements. The length of the second capillary tube 42 refers to the physical extension of the throttling channel used in the refrigeration mode of ice cream slurry. A longer length can increase the refrigerant flow resistance and form a moderate throttling effect with a smaller inner diameter to achieve a small flow rate of refrigerant.

[0035] Through the above technical solution, in the refrigeration mode of snow-melting slurry, the first capillary 32 reduces flow resistance through a combination of shorter length and larger inner diameter; in the refrigeration mode of ice cream slurry, when the two capillaries are initially opened in parallel, they form a compound throttling loop, increasing the refrigerant flow rate and causing the evaporation temperature in the evaporator to drop rapidly, achieving rapid cooling of the slurry. Subsequently, only the second capillary 42 remains open, generating higher flow resistance through a combination of longer length and smaller inner diameter, allowing the refrigerant to form a stable throttling effect as it flows through, maintaining a lower evaporation temperature in the evaporator, and achieving cooling of the slurry to the ice cream forming temperature; the parameter difference between the two capillaries allows the refrigeration system to automatically switch the throttling intensity according to the operating mode, adapting to the temperature control requirements of different materials without the need for additional adjustment devices.

[0036] This application further proposes that the dual-throttling refrigeration control device also includes a filter 9, the inlet of which is connected to the outlet of the condenser via a pipeline, and the input ends of the first throttling module 3 and the second throttling module 4 are connected in parallel via pipelines at the outlet of the filter 9.

[0037] Among them, filter 9 refers to a device used to intercept solid impurities in the refrigerant; the condenser outlet refers to the pipeline interface through which the refrigerant flows to the throttling module after condensation. By connecting filter 9, it can be ensured that the refrigerant completes impurity separation before entering the throttling module; the parallel setting means that the input ends of the two throttling modules form branch pipelines with the output end of filter 9 through a three-way fitting, so that the refrigerant can enter the two throttling modules simultaneously or at different times.

[0038] Specifically, after the refrigerant is output from the condenser, it first flows through filter 9, where the filter layer physically intercepts impurities in the refrigerant. The clean refrigerant then enters the first throttling module 3 and the second throttling module 4 through parallel pipelines, selecting a single or dual throttling path based on the opening and closing status of the solenoid valve. This layout avoids impurities from entering the capillary tube and causing blockage of the throttling channel through pre-filtering, while the parallel pipeline structure allows the two throttling modules to work independently or collaboratively, adapting to the different refrigerant flow requirements of different cooling modes.

[0039] Please refer to Figure 2 This application further proposes a control method for use in a dual-throttling refrigeration control device. The method includes a first refrigeration mode for snow-melting slurries requiring higher evaporation temperatures and a second refrigeration mode for soft-serve ice cream slurries requiring rapid cooling and lower evaporation temperatures. The dual-throttling refrigeration control device includes the following steps: acquiring the real-time material status of the freezing cylinder 6 and the real-time selected operating mode; controlling the on / off states of the compressor 1, the freezing cylinder stirring motor 8, the first solenoid valve 31, and / or the second solenoid valve 41 according to the preset states corresponding to the real-time material status and the operating mode.

[0040] Among them, the real-time material status refers to the temperature value and rheological characteristic data of the material in the refrigeration cylinder 6 collected in real time by temperature and viscosity sensors. Specifically, thermocouples and rotational viscometers can be used to reflect the phase change process of the material. The preset state corresponding to the operating mode refers to the target temperature range and viscosity threshold corresponding to different material types. Specifically, it can be achieved by storing the phase change curve parameters of different materials in the control program to establish the reference conditions for refrigeration control. The on / off state of the first solenoid valve 31 and the second solenoid valve 41 refers to the opening and closing of the capillary passage by driving the solenoid coil through the control circuit to switch between single-throttling or double-throttling working states.

[0041] Specifically, when the system detects that the user has selected the snow-melting slurry mode, it automatically calls the control logic of the first refrigeration mode; the temperature sensor continuously monitors the material temperature, and when the temperature does not reach the snow-melting molding threshold, the compressor 1 starts and opens the first solenoid valve 31, so that the refrigerant only flows through the first capillary tube 32; when the material viscosity reaches the preset range, the stirring motor switches to intermittent operation to maintain the uniform distribution of ice crystals; for the ice cream mode, the system simultaneously opens the dual solenoid valves to achieve dual throttling channel operation, and quickly reduces the evaporation temperature through the superimposed throttling effect, so that the material reaches the low temperature environment required for emulsification in a shorter time; the viscosity sensor provides real-time feedback on the degree of material emulsification, and automatically extends the opening time of the first solenoid valve 31 when the viscosity is lower than the molding threshold.

[0042] Compared with existing technologies, traditional snow-melting ice cream equipment only adopts a single throttling mode, which usually forcibly lowers the temperature by extending the cooling time, resulting in excessively large ice crystal particles or insufficient emulsification of ice cream in snow-melting products. This solution uses a dual-mode cooling control logic to dynamically adjust the evaporation temperature according to the phase change process of the material. In snow-melting mode, it maintains mild cooling to control the ice crystal growth rate, and in ice cream mode, it enhances the cooling capacity to accelerate the cooling to the emulsification stage.

[0043] Through the above technical solutions, this application achieves precise control of the phase change process of materials in the freezing cylinder 6. For snow-melting slurry, by maintaining a high evaporation temperature to slow down the cooling rate, it ensures that ice crystals grow in an orderly manner within a suitable temperature range, forming a semi-frozen state of solid-liquid mixture. For soft-serve ice cream slurry, by superimposing a double throttling effect, the evaporation temperature is rapidly reduced, shortening the time for the material to reach the emulsification critical temperature. The ice cream slurry is stirred by the stirrer 7 connected to the stirring motor 8 of the freezing cylinder, promoting the incorporation of air to form a stable emulsion suspension. The temperature control in both modes effectively avoids over-cooling or insufficient emulsification, enabling the equipment to adapt to the phase change characteristics requirements of different materials.

[0044] Please refer to Figure 3This application further proposes that in the first refrigeration mode, the preset state includes the snow melting molding temperature. The steps for controlling the opening and closing states of compressor 1, first solenoid valve 31 and second solenoid valve 41 according to the real-time material state and the preset state corresponding to the operating mode include the following specific steps: determining whether the real-time material state meets the snow melting molding temperature; if the real-time material state does not match the snow melting molding temperature, controlling compressor 1 to start and first solenoid valve 31 to start, and re-determining whether the real-time material state meets the snow melting molding temperature after a preset time T1 when first solenoid valve 31 is opened; if the real-time material state matches the snow melting molding temperature, controlling compressor 1 and first solenoid valve 31 to close, and the freezing cylinder stirring motor 8 to run intermittently.

[0045] Among them, the snow melting molding temperature refers to the critical temperature threshold required for the slurry to form a semi-frozen state. Specifically, it can be achieved by using a temperature sensor to monitor the material temperature in the freezing cylinder 6 in real time. This temperature threshold is set to ≤-1.0℃ to match the ice crystal growth requirements of snow melting slurry. The preset time T1 refers to the time window during which the refrigerant is allowed to continuously throttle after the solenoid valve is opened. Specifically, it can be achieved through a timer module, with the time range set to 1-60 minutes to balance refrigeration efficiency and energy consumption. The intermittent operation of the freezing cylinder stirring motor 8 refers to the stirrer 7 switching to a periodic start-stop mode after reaching the target temperature. Specifically, it can be achieved through motor controller programming to avoid continuous high-speed stirring from damaging the ice crystal structure.

[0046] Specifically, when the system detects that the material temperature in the freezing cylinder 6 is higher than -1.0℃, it immediately starts the compressor 1 and opens the first solenoid valve 31, allowing the refrigerant to expand through the first capillary tube 32. At this time, only the first capillary tube 32 participates in the refrigeration circuit to provide a higher evaporation temperature. After continuous refrigeration for 1-60 minutes, the system re-collects temperature data to determine whether the target has been met. If the temperature has dropped to the target value, the refrigeration circuit is shut off and the freezing cylinder stirring motor 8 is switched to intermittent operation mode to maintain the uniformity of the material through periodic stirring. If the target is still not met, the refrigeration state is maintained until the next detection cycle. This control logic ensures that the material phase change process is fully completed through the synergistic effect of temperature threshold judgment and time delay re-inspection.

[0047] Through the above technical solutions, this application achieves precise control of the temperature curve of the freezing cylinder 6 during the refrigeration process of snow-melting slurry; the dual judgment mechanism of temperature threshold and time window effectively prevents the compressor 1 from starting and stopping ineffectively, reducing system energy consumption; the independent throttling effect of the first capillary 32 maintains a stable evaporation temperature, ensuring that ice crystals grow as needed; the intermittent stirring mode maintains the uniformity of materials while avoiding the damage of mechanical shear force to the ice crystal structure, ultimately enabling the snow-melting slurry to reach an ideal semi-frozen state.

[0048] In one application scenario of this embodiment, the speed of the freezing cylinder stirring motor 8 in the first refrigeration mode is set to 2000-3000 rpm, for example, specifically 2600 rpm for snow melting, 2800 rpm for cocktails, 2200 rpm for milkshakes, 2000 rpm for juices, and 2000 rpm for cold drinks; and the freezing cylinder stirring motor 8 is equipped with a reduction mechanism with a reduction ratio of 60, which varies from factory to factory. The actual speed of the stirrer 7 is the motor speed / reduction ratio.

[0049] Please refer to Figure 4 This application further proposes that in the first refrigeration mode, the preset state also includes a preset viscosity, which is 500-2000 cP. Depending on the added snow-melting slurry, such as cocktails, milkshakes, juices, cold drinks, etc., different preset viscosities and corresponding stirring motor speeds are set within the range of 500-2000 cP. The control of the opening and closing states of compressor 1, first solenoid valve 31 and second solenoid valve 41 based on the preset state corresponding to the real-time material state and the operating mode also includes the following specific steps: after the real-time material state meets the snow-melting molding temperature, it is determined whether the real-time material state meets the preset viscosity; if the real-time material state matches the preset viscosity, the first solenoid valve 31 is closed and the freezing cylinder stirring motor 8 runs intermittently; if the real-time material state does not match the preset viscosity, compressor 1 is controlled to start, the first solenoid valve 31 is opened, and after a preset time T2 after the first solenoid valve 31 is opened, it is re-determined whether the real-time material state meets the preset viscosity.

[0050] Among them, the preset viscosity refers to the flow characteristic parameter of the material at the snow melting and forming temperature. It can be measured in real time using a rotational viscometer or a vibrational viscosity sensor to characterize the mixing ratio of ice crystals and liquid components in the material. The real-time material state refers to the physical state data of the material in the freezing cylinder 6, which is collected synchronously by the temperature sensor and the viscosity sensor. It is used to dynamically provide feedback on the degree of phase change of the material. Intermittent operation refers to the working mode of the stirring motor starting and stopping according to a preset cycle. It can be implemented using a time relay or a programmable controller to balance the relationship between ice crystal growth control and mechanical energy input. The preset time T2 refers to the minimum duration of a single refrigeration intervention. It can be calibrated experimentally based on the relationship between the material's heat capacity and refrigeration power to ensure the effectiveness of viscosity adjustment.

[0051] Specifically, when the material temperature reaches the snow melting and molding temperature threshold, the viscosity detection module starts working; if the measured viscosity is within the range of 500-2000 cP, it is determined that the material has reached the ideal semi-frozen state. At this time, the refrigeration system is shut down and the intermittent stirring program is started to maintain the uniformity of the material through periodic stirring; when the viscosity is lower than the lower limit, the system reactivates the refrigeration circuit and continuously injects cold energy during the T2 time period to promote further crystallization of the liquid components; during this process, the stirring speed is automatically reduced to a low-speed mode to avoid damaging the already formed ice crystal network structure; after each refrigeration intervention, the system re-evaluates the viscosity data to form a closed-loop control circuit.

[0052] Through the above technical solution, this application can dynamically match the phase change process of snow-melting slurry with the working state of the refrigeration system, and accurately control the viscosity index of the material while maintaining the target molding temperature. This control method effectively prevents excessive ice crystal growth caused by insufficient viscosity, and avoids excessive freezing of the material caused by continuous refrigeration, ensuring that snow-melting products always maintain ideal semi-solid texture and taste characteristics.

[0053] Please refer to Figure 5 This application further proposes that in the second refrigeration mode, the preset states include ice cream emulsification temperature and ice cream forming temperature. Controlling the on / off states of compressor 1, first solenoid valve 31, and second solenoid valve 41 based on the real-time material state and the preset states corresponding to the operating mode includes the following specific steps: determining whether the real-time material state meets the ice cream emulsification temperature; if the real-time material state does not match the preset state, controlling compressor 1 to open, first solenoid valve 31 and second solenoid valve 41 to open, and re-determining whether the real-time material state meets the ice cream emulsification temperature after a preset time since the first solenoid valve 31 and second solenoid valve 41 have been open; if the real-time material state matches the ice cream emulsification temperature, controlling first solenoid valve 31 to close, keeping second solenoid valve 41 open, and determining whether the real-time material state meets the ice cream forming temperature after a preset time T3 since the first solenoid valve 31 has been closed; wherein, the ice cream emulsification temperature is set to ≤0℃, the ice cream forming temperature is set to ≤-5℃, and T3 is 1-60 min.

[0054] Among them, the ice cream emulsification temperature refers to the critical temperature threshold that the material needs to reach during the emulsification stage. Specifically, it can be achieved by using a temperature sensor to monitor the temperature data of the material in the freezing cylinder 6 in real time. This threshold is set as the upper limit of the temperature at which the material undergoes a phase change to form an emulsion structure. The ice cream forming temperature refers to the target temperature at which the material enters the hardening and shaping stage after emulsification. Specifically, it can be achieved by indirectly judging the degree of phase change completion of the material through a pressure sensor or a viscosity sensor. This temperature threshold is set as the minimum temperature requirement for the material to form a stable ice crystal network. The preset time T3 refers to the duration for which the system maintains the single capillary throttling mode after the first solenoid valve 31 is closed. Specifically, it can be set through the timer module to ensure that the material is fully shaped during the second stage of refrigeration.

[0055] Specifically, in the soft-serve ice cream making process, the real-time temperature data of the material in the freezing cylinder 6 is continuously collected by a temperature detection device. When the material temperature is detected to be above 0°C, the compressor 1 starts and simultaneously opens the first solenoid valve 31 and the second solenoid valve 41, allowing the refrigerant to undergo double throttling through two sets of parallel capillary tubes. At this time, the system is in a high-cooling-capacity mode to accelerate cooling. When the material temperature drops below 0°C, the first solenoid valve 31 is closed, leaving only the second capillary tube 42 to maintain refrigerant flow. At this time, the system switches to a deep-cooling mode to achieve the material shaping of the soft-serve ice cream. During the T3 time period when the second capillary tube 42 works alone, the material temperature continues to drop to below -5°C. At this time, the viscosity detection device confirms that the material has reached the semi-solid characteristics required for shaping. By controlling the opening and closing states of the solenoid valves in stages, the dynamic matching of cooling capacity and material phase change requirements is achieved.

[0056] Compared with existing technologies, traditional ice cream machine refrigeration systems only use a single throttling device, which cannot adjust the cooling capacity according to the different temperature requirements of the emulsification and forming stages. In existing technologies, the refrigerant flow rate is fixed, which may lead to insufficient cooling capacity during the emulsification stage, resulting in slow cooling speed, or excessive cooling capacity during the forming stage, causing damage to the material structure. This solution uses dual solenoid valves to coordinately control the parallel / independent operation of two sets of capillary tubes, providing a large flow rate of refrigerant to accelerate cooling during the high-temperature stage and reducing the flow rate to maintain precise temperature control during the low-temperature stage, thus solving the problem that a single refrigeration mode cannot adapt to multi-stage temperature curves.

[0057] In one application scenario of this embodiment, the speed of the freezing cylinder stirring motor 8 in the second refrigeration mode is set to 1500-2000 rpm, for example, specifically 1800 rpm for soft ice cream; and the freezing cylinder stirring motor 8 is equipped with a reduction mechanism with a reduction ratio of 60, which varies from factory to factory. The actual speed of the stirrer 7 is the motor speed / reduction ratio.

[0058] Please refer to Figure 6This application further proposes that, in the second refrigeration mode, the preset state also includes a preset viscosity, which is 5000-10000 cP; the control of the opening and closing states of compressor 1, first solenoid valve 31 and second solenoid valve 41 according to the preset state corresponding to the real-time material state and the operating mode also includes the following specific steps: after the real-time material state meets the ice cream forming temperature, it is determined whether the real-time material state meets the preset viscosity. If the real-time material state matches the preset viscosity, the second solenoid valve 41 is closed and the freezing cylinder stirring motor 8 is stopped; if the real-time material state does not match the preset viscosity, compressor 1 is controlled to start and the second solenoid valve 41 is opened, and the real-time material state is re-determined to meet the preset viscosity after a preset time T4 of the second solenoid valve 41 being opened; wherein, T4 is 1-60 min.

[0059] Among them, the preset viscosity refers to the rheological properties parameter required for the slurry to reach a semi-fluid expanded emulsion during the soft ice cream forming process. Specifically, it can be detected in real time using a rotational viscometer or a vibrational viscosity sensor. The range of this parameter is determined through experimental data and is used to characterize the degree of completion of ice crystal micronization and aeration emulsification. The T4 time refers to the duration for which the second solenoid valve 41 is kept open when the viscosity does not meet the standard. Specifically, it can be set through the timer module, for example, it can be any value within 1 to 60 minutes, in order to avoid temperature fluctuations caused by frequent start-stop.

[0060] Specifically, once the ice cream forming temperature reaches the target, the system continuously monitors the state of the slurry using a viscosity sensor. If the viscosity is detected to be within the range of 5000-10000 cP, it indicates that the ice crystal particle size has been refined to the target range and the aeration and emulsification are sufficient. At this point, the second solenoid valve 41 is closed to stop the refrigerant flow, and the stirring motor is stopped to prevent over-cooling and hardening of the slurry. If the viscosity does not meet the target, the second solenoid valve 41 is kept open, allowing the second capillary tube 42 to continuously deliver refrigerant to the evaporator. By extending the cooling time T4, the slurry is further cooled and the mechanical stirring effect is enhanced until the viscosity enters the preset range. This process ensures that the ice cream slurry meets both thermodynamic and rheological requirements during the phase change process through dual feedback control of temperature and viscosity.

[0061] Through the above technical solution, this application achieves precise viscosity control of soft ice cream mix during the molding stage, effectively preventing hardening of the mix or energy waste caused by excessive cooling, while avoiding problems such as coarsening of ice crystals and insufficient aeration caused by insufficient cooling, ensuring that the finished ice cream has a uniform and delicate texture and a stable overrun.

[0062] Please refer to Figures 7-8 This application further proposes an ice cream melting machine, including a dual-throttling refrigeration control device. The ice cream melting machine also includes a machine body 10, a dispensing head 11, a sensor assembly, and an electronic control motherboard, which is used to control the operation of each component.

[0063] This application further proposes a sensor assembly including a temperature sensor and a viscosity sensor, both disposed inside the freezing cylinder 6, for real-time monitoring of the temperature and material viscosity within the freezing cylinder 6; the viscosity sensor is a device for detecting the flow resistance of materials, specifically a rotary or vibratory sensor, which converts the change in resistance of the material to the sensor probe into a viscosity value; the snow melting forming viscosity refers to the viscosity range required for the material to reach an ideal semi-solid state during the snow melting process, such as 500-2000 cP, which ensures that the snow melting texture is soft and easy to form; the ice cream forming viscosity refers to the viscosity range required for the material to form a stable solid structure during the ice cream making process, such as 5000-10000 cP, which avoids ice cream from having a loose structure due to excessively low viscosity or excessive stirring resistance due to excessively high viscosity.

[0064] This application further proposes that the ice cream mode of the dual-throttling refrigeration control device also includes a dispensing mode, which is triggered by a dispensing button or by a sensor.

[0065] The discharge mode refers to the working state after the ice cream has been formed and enters the material discharge stage. Specifically, this can be achieved by increasing the speed of the freezing cylinder stirring motor 8 to enhance the material flowability, for example, by increasing the speed to over 3000 rpm, thereby overcoming the resistance of high-viscosity materials. The discharge button refers to a physical or touch button manually triggered by the user, and it can be designed to be waterproof to adapt to the food processing environment. In ice cream mode, when the material reaches the target viscosity and temperature, and after receiving the discharge command, the speed of the freezing cylinder stirring motor 8 is increased to a speed higher than the highest speed in the normal stirring stage, for example, from 1500-2000 rpm to 3000-3500 rpm. The increased speed causes the pushing blades of the stirrer 7 to generate stronger shearing force, pushing the high-viscosity material towards the discharge port. The discharge mode can be started by the user actively pressing the discharge button, or automatically triggered by the sensor detecting a material receiving device below the discharge mechanism.

[0066] This application further proposes a pre-set cleaning mode on the control motherboard, triggered by a cleaning button. In cleaning mode, the speed of the freezing cylinder stirring motor 8 is higher than that in discharge mode. Cleaning mode refers to the operating state used to clean the residual materials in the freezing cylinder 6 and the stirrer 7 after the equipment has finished running. Specifically, it can be achieved by controlling the freezing cylinder stirring motor 8 and the refrigeration system to work together through a preset program. This mode enhances the removal effect of residues by increasing the stirring speed. The cleaning button trigger means that the user can directly start the cleaning process through a physical button or touch screen option. Specifically, it can be implemented by a separate button or integrated into the interactive interface of the control panel. This design simplifies the user's operation steps. The speed setting means that the running speed of the freezing cylinder stirring motor 8 in cleaning mode is higher than that in discharge mode, for example, increasing it from 3000-3500 rpm to 4000-5000 rpm. This allows the stirrer 7 to generate greater centrifugal force when rotating at high speed to remove the material adhering to the inner wall of the freezing cylinder 6.

[0067] Specifically, when the user triggers the cleaning button, the control motherboard cuts off the power supply to the refrigeration system according to the preset program, and at the same time increases the speed of the freezing cylinder stirring motor 8 to a speed higher than the highest speed in the discharge mode; during the high-speed rotation of the stirrer 7, the pressure cavity formed by the pushing blades and the inner wall of the freezing cylinder 6 generates periodic pressure changes, which, combined with the centrifugal force, peels the residual material from the inner wall and discharges it through the discharge port.

[0068] This application further proposes a dual-throttling refrigeration control device. The inner wall size of the freezing cylinder 6 near the discharge port is gradually reduced to match the outer diameter of the agitator 7. The agitator 7 includes pusher blades, which are installed at an adjustable angle at the front end of the agitator 7. The inner wall of the freezing cylinder 6 near the discharge port and the pusher blades form a semi-closed pressure chamber. When the agitator 7 is running, the pressure in the pressure chamber is greater than the pressure in the freezing cylinder 6.

[0069] The gradual reduction in inner wall size refers to the gradual decrease in the diameter of the inner wall of the freezing cylinder 6 near the discharge port, forming a conical structure. This design causes the material to accumulate along the inner wall towards the discharge port during the mixing process. When the agitator 7 rotates, the pusher blades push the material towards the discharge port. Due to the gradual reduction in the inner wall size of the freezing cylinder 6, the material is subjected to gradually increasing compressive force during its movement. The formation of the pressure chamber causes the material in this area to be continuously compressed. When the agitator 7 is running, the pressure inside the chamber is higher than in other areas of the freezing cylinder 6, forcing the material to flow towards the discharge port, thus achieving efficient material discharge.

[0070] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A dual-throttling refrigeration control device, characterized in that, The dual-throttling refrigeration control device includes a compressor, a condenser, a first throttling module, a second throttling module, and a feed cylinder evaporator. The first throttling module and the second throttling module are connected in parallel via pipelines between the condenser and the feed cylinder evaporator, which is located inside the freezing cylinder. The compressor, the condenser, the feed cylinder evaporator, and the first and / or second throttling modules form a refrigeration circuit. An agitator is rotatably mounted on the outside of the feed cylinder evaporator, and the agitator is driven by a stirring motor of the freezing cylinder to scrape off the cooled raw material from the outer surface of the feed cylinder evaporator. The first throttling module includes a first solenoid valve and a first capillary tube, wherein the first solenoid valve is used to control the flow of refrigerant in the first capillary tube; the second throttling module includes a second solenoid valve and a second capillary tube, wherein the second solenoid valve is used to control the flow of refrigerant in the second capillary tube.

2. The dual-throttling refrigeration control device as described in claim 1, characterized in that, The dual-throttling refrigeration control device includes a first refrigeration mode for snow-melting slurries that require higher evaporation temperatures and a second refrigeration mode for soft-serve ice cream slurries that require rapid cooling and lower evaporation temperatures. In the first refrigeration mode, the compressor, the condensing device, the first throttling module and the feed cylinder evaporator form a refrigeration circuit. When the dual throttling refrigeration control device is started for the first time, the first solenoid valve is opened, the second solenoid valve is closed, and the freezing cylinder stirring motor is turned on and stirred at a relatively high speed. In the second refrigeration mode, the stirring motor of the freezing cylinder is turned on, and the compressor, the condensing device, the first throttling module, the second throttling module and the evaporator of the material cylinder form a refrigeration circuit. When the dual throttling refrigeration control device is turned on for the first time, the first solenoid valve and the second solenoid valve are opened simultaneously, and the stirring motor of the freezing cylinder is turned on and stirs at a low speed.

3. The dual-throttling refrigeration control device as described in claim 2, characterized in that, The length of the first capillary is set to 0.3m-2.5m, and the inner diameter of the first capillary is set to 0.4mm-2.0mm; The length of the second capillary is set to 0.6m-3.0m, and the inner diameter of the second capillary is set to 0.3mm-1.2mm.

4. The dual-throttling refrigeration control device as described in claim 1, characterized in that, The dual-throttling refrigeration control device also includes a filter. The inlet of the filter is connected to the outlet of the condenser via a pipe. The inputs of the first throttling module and the second throttling module are connected in parallel via pipes at the outlet of the filter.

5. A control method, applicable to the dual-throttling refrigeration control device as described in any one of claims 1-4, characterized in that, The method includes a first refrigeration mode for snow-melting slurries requiring higher evaporation temperatures and a second refrigeration mode for soft-serve ice cream slurries requiring rapid cooling and lower evaporation temperatures. The dual-throttling refrigeration control device includes the following steps: S10. Obtain the real-time material status and the real-time selected operating mode of the freezing cylinder; S20. Control the on / off states of the compressor, the refrigeration cylinder stirring motor, the first solenoid valve, and the second solenoid valve according to the real-time material status and the preset state corresponding to the operating mode.

6. The control method as described in claim 5, characterized in that, In the first refrigeration mode, the preset state includes the snow melting and molding temperature. Step S20, which controls the on / off states of the compressor, the first solenoid valve, and the second solenoid valve based on the real-time material state and the preset state corresponding to the operating mode, includes the following specific steps: S201. Determine whether the real-time material status matches the snow melting molding temperature; S202. If the real-time material status matches the snow melting molding temperature, control the compressor and the first solenoid valve to close, and the freezing cylinder stirring motor to run intermittently. S203. If the real-time material status does not match the snow melting molding temperature, control the compressor to start, the first solenoid valve to open, and re-determine whether the real-time material status matches the snow melting molding temperature after a preset time T1 after the first solenoid valve is opened. The snow melting molding temperature is set to ≤-1.0℃, and T1 is 1-60min.

7. The control method as described in claim 6, characterized in that, In the first refrigeration mode, the preset state also includes a preset viscosity, which is 500-2000 cP; step S20, which controls the on / off states of the compressor, the first solenoid valve, and the second solenoid valve based on the real-time material state and the preset state corresponding to the operating mode, further includes the following specific steps: S204. After the real-time material state matches the snow melting molding temperature, determine whether the real-time material state matches the preset viscosity. S205. If the real-time material state matches the preset viscosity, the first solenoid valve is closed, and the stirring motor of the freezing cylinder runs intermittently. S206. If the real-time material state does not match the preset viscosity, control the compressor to start, the first solenoid valve to open, and re-determine whether the real-time material state matches the preset viscosity after a preset time T2 when the first solenoid valve is open. T2 is 1-60 min.

8. The control method as described in claim 5, characterized in that, In the second refrigeration mode, the preset state includes the ice cream emulsification temperature and the ice cream forming temperature. Step S20, which controls the on / off states of the compressor, the first solenoid valve, and the second solenoid valve based on the real-time material state and the preset state corresponding to the operating mode, includes the following specific steps: S201' Determine whether the real-time material status matches the cream emulsification temperature; S202' If the real-time material state does not match the preset state, control the compressor to start, the first solenoid valve and the second solenoid valve to open, and after the first solenoid valve and the second solenoid valve have been open for a preset time, re-determine whether the real-time material state matches the cream emulsification temperature. S203' If the real-time material state matches the ice cream emulsification temperature, control the first solenoid valve to close, keep the second solenoid valve open, and determine whether the real-time material state matches the ice cream forming temperature after a preset time T3 when the first solenoid valve is closed. The ice cream emulsification temperature is set to ≤0℃, the ice cream forming temperature is set to ≤-5℃, and T3 is 1-60min.

9. The control method as described in claim 8, characterized in that, In the second refrigeration mode, the preset state also includes a preset viscosity, which is 5000-10000 cP; step S20, which controls the on / off states of the compressor, the first solenoid valve, and the second solenoid valve based on the real-time material state and the preset state corresponding to the operating mode, further includes the following specific steps: S204' After the real-time material state matches the ice cream forming temperature, determine whether the real-time material state matches the preset viscosity; S205' If the real-time material state matches the preset viscosity, close the second solenoid valve and stop the stirring motor of the freezing cylinder; S206' If the real-time material state does not match the preset viscosity, control the compressor to start, the second solenoid valve to open, and re-determine whether the real-time material state matches the preset viscosity after a preset time T4 when the second solenoid valve is open. T4 is 1-60 min.

10. An integrated ice cream melting machine, characterized in that, Including the dual-throttling refrigeration control device as described in any one of claims 1-4, the ice cream melting machine also includes a machine body, a dispensing head, a sensor assembly, and an electronic control main board, wherein the electronic control main board is used to control the operation of each component.

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