CN-122015386-A - Quick-freezing device based on refrigerating fluid and temperature adjusting method

CN122015386ACN 122015386 ACN122015386 ACN 122015386ACN-122015386-A

Abstract

The invention discloses a quick freezing device and a temperature regulating method based on refrigerating fluid, which belong to the technical field of quick freezing devices and comprise refrigerating tanks for freezing food, wherein a refrigerating unit, a layered refrigerator and a temperature regulating tank are arranged below the refrigerating tanks, a refrigerating pipe is arranged at the refrigerating end of the refrigerating unit and is positioned in the layered refrigerator, micro-refrigerating fluid is filled in the layered refrigerator, when the quick freezing device works, the micro-refrigerating fluid is conveyed into the temperature regulating tank after being refrigerated in the layered refrigerator, then conveyed into the refrigerating tanks, and flows back into the layered refrigerator after contacting with the food, three layers of refrigerating cavities are sequentially arranged in the layered refrigerator from top to bottom, one-way valves are arranged between the refrigerating cavities of two adjacent layers, each refrigerating cavity is provided with a liquid mixing pipe connected with the temperature regulating tank, and each liquid mixing pipe is provided with a control valve, and the opening degree and the opening time of each control valve are controlled according to different temperature requirements when the quick freezing device works. The accurate and dynamic temperature control of the freezing process is realized.

Inventors

LIAN RULONG
CHEN SICHENG
CHEN BINGHUAN

Assignees

唯冻(厦门)节能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260227

Claims (10)

1. Quick-freezing device based on refrigerating fluid, its characterized in that: The refrigerator comprises a freezing tank for freezing food, wherein a refrigerating unit, a layered refrigerator and a temperature regulating tank are arranged below the freezing tank, a refrigerating pipe is arranged at the refrigerating end of the refrigerating unit and is positioned in the layered refrigerator, micro-freezing liquid is filled in the layered refrigerator, and when the refrigerator works, the micro-freezing liquid is conveyed to the temperature regulating tank after being refrigerated in the layered refrigerator, conveyed to the freezing tank, and flows back to the layered refrigerator after contacting with the food; three layers of refrigerating cavities are sequentially arranged in the layered refrigerator from top to bottom, one-way valves are arranged between the refrigerating cavities of two adjacent layers, each layer of refrigerating cavity is provided with a liquid mixing pipe connected with the temperature regulating tank, each liquid mixing pipe is provided with a control valve, and the opening degree and the opening time of the three control valves are controlled according to different temperature requirements during working.
2. The chilled liquid based quick freezing apparatus of claim 1, wherein: The refrigerating pipe is of a serpentine bending structure, the refrigerating pipe enters from the refrigerating cavity at the bottommost end and sequentially passes through each refrigerating cavity to be discharged from the top, a return pipe is arranged at the top of the layered refrigerator and is communicated with the refrigerating tank, and a return on-off valve is arranged on the return pipe.
3. The chilled liquid based quick freezing apparatus of claim 1, wherein: Along the direction from top to bottom, the space of the refrigerating cavities is gradually reduced, each refrigerating cavity is internally provided with a temperature sensor, and the one-way valve is positioned at one side of the liquid mixing pipe.
4. The chilled liquid based quick freezing apparatus of claim 2, wherein: the top of the temperature-adjusting tank is provided with a circulating pump, the circulating pump is fixed on the lower side face of the freezing tank, a liquid inlet pipe of the circulating pump extends to the bottom end of the temperature-adjusting tank, and a liquid outlet pipe of the circulating pump extends to the freezing tank.
5. The chilled liquid based quick freezing apparatus of claim 4, wherein: One side of the temperature regulating tank is provided with an installing table, three control valves are fixedly installed on the installing table, and the three liquid mixing pipes are sequentially connected with the three control valves according to the height sequence.
6. The chilled liquid based quick freezing apparatus of claim 4, wherein: the refrigerating unit comprises a compressor, a radiator and a controller, wherein the controller is electrically connected with the compressor and the radiator, the hot end of the compressor is connected with the radiator, the radiator comprises a cooling fan, cooling fins and a heat conducting tube, the heat conducting tube is connected with the hot end of the compressor, the heat conducting tube extends into the cooling fins, and the cooling fan is fixed on one side of the cooling fins.
7. The chilled liquid based quick freezing apparatus of claim 6, wherein: the temperature control tank is characterized in that a temperature sensor is also arranged in the temperature control tank, the controller is electrically connected with all the temperature sensors, the controller is electrically connected with the control valve and the reflux on-off valve, and the controller adjusts the opening of the control valve and the reflux on-off valve according to temperature signals of the temperature sensor.
8. The chilled liquid based quick freezing apparatus of claim 7, wherein: The refrigerating tank is characterized in that liquid outlet buffers and reflux filters are respectively arranged at two ends of the refrigerating tank, the liquid outlet buffers are connected with liquid outlet pipes of the circulating pump, a plurality of liquid outlet holes are formed in the liquid outlet buffers, filter screens are arranged on the reflux filters, and the reflux filters are communicated with the reflux pipes.
9. The chilled liquid based quick freezing apparatus of claim 8, wherein: the refrigerator is characterized in that heat preservation layers are arranged outside the freezing tank, the layered refrigerator and the temperature regulating tank, and a sealing cover is arranged at the top of the freezing tank.
10. A method of conditioning a chilled liquid based freezer of claim 9, wherein: S1, system initialization and temperature gradient establishment, namely starting a refrigerating unit, a compressor driving a refrigerant to circulate in a refrigerating pipe, starting a heat dissipation fan by a controller to dissipate heat at the hot end of the compressor, enabling the refrigerating pipe to sequentially flow through a lower refrigerating cavity, a middle refrigerating cavity and an upper refrigerating cavity of a layered refrigerator to refrigerate micro-frozen liquid in the refrigerating pipe, respectively forming three different stable low-temperature areas of high, middle and low in the three refrigerating cavities, and establishing a vertical temperature gradient; S2, setting a target freezing curve, namely selecting or customizing a target freezing temperature-time curve on a human-computer interface of a controller according to the type of the food to be frozen and the optimal fresh-keeping process requirement, wherein the curve defines the real-time target temperature which is required to be reached by the micro-frozen liquid in a freezing tank in the whole freezing period; S3, dynamically mixing and adjusting temperature, namely, the controller calculates the mixing proportion of high, medium and low temperature slightly frozen liquid required for reaching the target temperature through a built-in algorithm according to the target temperature at the current moment set in the S2 and combining with feedback of a temperature sensor in the temperature adjusting tank; S4, homogenizing, conveying and quick-freezing the micro-frozen liquid in the temperature regulating tank to a liquid outlet buffer of the freezing tank through a circulating pump, uniformly adding the micro-frozen liquid into the freezing tank through a liquid outlet hole on the micro-frozen liquid, and enabling the micro-frozen liquid to act on the surface of food to perform rapid heat exchange; S5, real-time feedback and closed-loop control, namely continuously transmitting temperature signals to a controller by temperature sensors of each layer of a freezing tank and a layered refrigerator in the quick freezing process, comparing the real-time data with a target curve in the S2 by the controller, immediately returning to the S3 if deviation occurs, and recalculating and adjusting the opening of each control valve to form closed-loop control so as to ensure that the freezing process accurately follows a preset curve; S6, ending and resetting the process, namely when the controller judges that the quick-freezing process reaches the set time and the final temperature or manually ending by an operator, firstly closing the circulating pump and the refrigerating unit by the controller, then gradually closing all control valves and the reflux on-off valve, and enabling the system to enter a standby state to finish the temperature-adjusting quick-freezing operation.

Description

Quick-freezing device based on refrigerating fluid and temperature adjusting method Technical Field The invention relates to the technical field of quick-freezing devices, in particular to a quick-freezing device based on a freezing solution and a temperature adjusting method. Background Food freezing and fresh-keeping are one of the core technologies of the modern food industry, and the principle is to inhibit microbial activity and enzyme reaction at low temperature so as to prolong the quality guarantee period of the food. However, ice crystals formed during conventional freezing, particularly large ice crystals, can puncture the cell structure of the food product, resulting in loss of juice, soft texture, and significant degradation of flavor and nutritional quality upon thawing. Thus, the core challenge of refrigeration technology is to shift from a mere "rapid cooling" to "how to effectively control the morphology, size, and distribution of ice crystals during rapid cooling. To solve the defects of the traditional freezing technology, the micro-freezing solution technology is generated. The technology adopts high-tech biotechnology to study the ice crystallization state of organism cells in a low-temperature state, and uses low-temperature and ultra-low-temperature technology and natural component micro-freezing liquid to directly freeze and preserve frozen foods by using innovative freezing curves. The micro-freezing liquid is a special solution prepared from natural substances, can still keep a liquid state at a low temperature of-40 ℃ to-30 ℃, has a density 1300 times that of air, and has a heat conductivity coefficient as high as 4 calories/(meter-hour-centigrade). The physical characteristics enable the micro-freezing liquid to realize extremely rapid heat conduction, and greatly shorten the freezing time of food. According to the variety and the size of the food, the micro-freezing solution technology can finish freezing and fresh-keeping of the food within 6-30 minutes, and the cell membrane in the frozen and fresh-keeping food is not frozen and is in a micro-frozen state of organisms. The temperature of the existing refrigerating device can generate larger fluctuation in different frozen time periods, so that ice crystals become larger, and when different frozen foods are replaced, the temperature cannot be quickly changed to a proper temperature, and the osmotic pressure, freezing point or nucleation characteristic of the frozen liquid cannot be adjusted in real time according to the cell structure difference of different foods such as high-moisture fruits and vegetables and high-fat meat. Disclosure of Invention The present invention is directed to solving the above-described problems. The invention aims to provide a quick freezing device based on a refrigerating fluid and a temperature regulating method for solving the problems, which realize accurate and dynamic temperature control in the refrigerating process and effectively inhibit the generation of destructive ice crystals. The scheme adopted by the invention is that the quick-freezing device based on the refrigerating fluid comprises a refrigerating tank for refrigerating food, wherein a refrigerating unit, a layered refrigerator and a temperature-regulating tank are arranged below the refrigerating tank; the refrigerating end of the refrigerating unit is provided with a refrigerating pipe, the refrigerating pipe is positioned in the layered refrigerator, the interior of the layered refrigerator is filled with slightly frozen liquid, and when the refrigerating unit works, the slightly frozen liquid is conveyed to the temperature regulating tank after being refrigerated in the layered refrigerator, is conveyed to the refrigerating tank, and is returned to the layered refrigerator after being contacted with food; three layers of refrigerating cavities are sequentially arranged in the layered refrigerator from top to bottom, one-way valves are arranged between the refrigerating cavities of two adjacent layers, each layer of refrigerating cavity is provided with a liquid mixing pipe connected with the temperature regulating tank, each liquid mixing pipe is provided with a control valve, and the opening degree and the opening time of the three control valves are controlled according to different temperature requirements during working. The preferable technical scheme is that the refrigerating pipe is of a serpentine bent structure, the refrigerating pipe enters from the refrigerating cavity at the bottommost end and sequentially passes through each refrigerating cavity to go out from the top, a return pipe is arranged at the top of the layered refrigerator and communicated with the refrigerating tank, and a return on-off valve is arranged on the return pipe. The preferable technical scheme is that the space of the refrigerating cavities is gradually reduced along the direction from top to bottom, each refrigerating cavity is internally prov