CN-121970799-A - Microcrystal resonance refrigerating system

CN121970799ACN 121970799 ACN121970799 ACN 121970799ACN-121970799-A

Abstract

The invention relates to the technical field of freezing, and particularly discloses a microcrystalline resonance freezing system which is used for solving the problems of difficult judgment of a phase change window, slow freezing, high energy consumption and overlarge ice crystal water damage caused by asynchronous ultrasonic input and refrigerating capacity in seafood freezing, and comprises a freezing cavity, a refrigerating unit, a tray, an ultrasonic vibrator, a temperature detection unit and a main control unit, wherein the refrigerating unit is in heat exchange connection with the freezing cavity, the ultrasonic vibrator comprises a plurality of ultrasonic transducers which are arranged below the tray and are coupled to seafood through a sound guiding layer, and the temperature detection unit comprises a cavity temperature sensor and a seafood center temperature probe; according to the invention, the ultrasonic intermittent beat is linked with the output of the refrigerating unit in the seafood phase change window, and the ultrasonic start-stop time length and the ultrasonic power are adaptively optimized on line, so that the total freezing time length of the phase change platform is shortened, the non-effective energy consumption is reduced, the central temperature fluctuation and the local supercooling are inhibited, fine and uniform ice crystals are formed, the drip loss is reduced, and the frozen seafood taste is improved.

Inventors

LIN ZHENXUAN
ZHOU JUN
ZHOU JIHAO
HUANG ZHIYONG
ZHOU RONGHUI
HUANG SHUAIQI

Assignees

广东巧新兴业科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260119

Claims (10)

1. The utility model provides a microcrystalline resonance refrigerating system, a serial communication port, including freezing chamber, refrigerating unit, the tray, ultrasonic vibrator, temperature detection unit and master control unit, refrigerating unit and freezing chamber heat transfer are connected, ultrasonic vibrator includes a plurality of ultrasonic transducers, lay in the tray below and couple to the seafood through leading the sound layer, temperature detection unit includes chamber temperature sensor and seafood center temperature probe, master control unit is when center temperature gets into and presets looks alternating temperature district and temperature change rate and satisfy the threshold value of predetermineeing, control ultrasonic vibrator is according to predetermineeing the long intermittent type work of start-up time and predetermineeing the shut-down time, and carry out the linkage modulation to refrigerating unit output in step.
2. The microcrystalline resonance freezing system according to claim 1, wherein the seafood center temperature probe is arranged at a center hole site of a representative heat load, the representative heat load is a food-grade simulation load block which is in the same batch as seafood to be frozen and has the same specification, the center hole site is a prefabricated hole, and the seafood center temperature probe is provided with a food-grade sealing sleeve and is sealed by a food-grade sealing material.
3. The microcrystalline resonance freezing system according to claim 1, wherein the chamber temperature sensor is arranged at an air return port of the freezing chamber.
4. The microcrystalline resonance freezing system according to claim 1, wherein the freezing control unit is connected with a freezing process knowledge graph library, the freezing process knowledge graph library is a time sequence causal knowledge graph oriented to freezing control, a stage slice subgraph is built according to a precooling stage, a supercooling stage, a nucleation stage, a phase change stage and a deep cooling stage, the freezing process knowledge graph library is formed by the seafood class, the specification, an initial center temperature, a packaging mode, a loading layer, a coupling state parameter of a tray and a package, a target center temperature curve, a phase change temperature region parameter, a temperature change rate threshold, an ultrasonic start-up time length, an ultrasonic stop time length, ultrasonic power, a refrigerating unit target output and a quality quantization index as nodes, each side comprises causal weight, confidence coefficient and an application domain parameter, the causal weight and the confidence coefficient are updated by the center temperature curve deviation of a historical batch, the phase change platform duration, the energy consumption and the quality quantization index increment, the main control unit maps the attribute characteristics of a current batch of seafood after receiving the cavity temperature data as graph, screens a candidate parameter set of the current batch according to an application domain and a hard constraint side, and performs the current sub-graph in the stage, and the ultrasonic output and the current sub-slice according to the map embedding similarity, and the ultrasonic stop time length corresponds to the current output parameter and the threshold, the ultrasonic stop time length and the ultrasonic stop time length change region, and the ultrasonic stop time length and the ultrasonic quality change threshold.
5. The microcrystalline resonance freezing system according to claim 1, wherein the main control unit generates parameter sets based on a collaborative recommendation mechanism, collaborative objects are historical frozen batches, the main control unit encodes the class, specification, packaging mode, loading level, initial center temperature and target end temperature of the seafood of the current batch into user side feature vectors, phase change temperature zone parameters, temperature change rate threshold, ultrasonic start-up time, ultrasonic stop time, ultrasonic power and target output of the refrigerating unit of each historical frozen batch are encoded into object side feature vectors, a user-object interaction matrix is constructed based on comprehensive freezing effect scores consisting of central temperature curve similarity and freezing time, energy consumption and water drop loss, the main control unit performs neighborhood collaborative filtering on the interaction matrix to obtain prediction scores of candidate parameter sets, and selects the candidate parameter set with the highest prediction scores as the phase change temperature zone, temperature change rate threshold, ultrasonic start-up time, ultrasonic stop time, ultrasonic power and target output of the refrigerating unit of the current batch.
6. The microcrystalline resonance freezing system according to claim 1, wherein the main control unit performs on-line adaptive adjustment on an ultrasonic start-up time length, wherein a central temperature sequence in a sliding time window is taken in a phase-change temperature region, an actual temperature change rate is obtained through least square fitting after exponential weighted filtering, a phase-change platform duration and a central temperature fluctuation amplitude are obtained through statistics to form a first actual feature vector, a first target feature vector is obtained through a target central temperature curve corresponding to a current freezing batch, a first feature covariance matrix is obtained from a historical batch similar to the current batch, a first mahalanobis deviation is calculated, when the first mahalanobis deviation exceeds a first threshold value and the absolute value of actual temperature change is smaller than the absolute value of target temperature change, the phase-change platform duration is longer than the target platform duration, the ultrasonic start-up time length is increased according to a preset step length, when the first mahalanobis deviation exceeds the first threshold value and the central temperature fluctuation amplitude reaches or exceeds a preset fluctuation upper limit, the ultrasonic start-up time length is reduced according to a preset step length, and the updated ultrasonic start-up time length is used for a next control period.
7. The microcrystalline resonance freezing system according to claim 1, wherein the main control unit performs on-line adaptive adjustment on the ultrasonic shutdown time, wherein sliding time window sampling is performed on the seafood center temperature in a preset phase change temperature region, an ultrasonic effective duty ratio in the time window is calculated, the center temperature fluctuation amplitude and the phase change platform duration are obtained to form a second actual feature vector, a second target feature vector is obtained from a target center temperature curve corresponding to a current freezing batch, a second feature covariance matrix is obtained from a historical batch similar to the current batch, a second mahalanobis deviation is calculated, the ultrasonic shutdown time is increased according to a preset step length when the second mahalanobis deviation exceeds a second threshold and the ultrasonic effective duty ratio exceeds a preset duty ratio upper limit or the center temperature fluctuation threshold reaches or exceeds a preset fluctuation upper limit, the ultrasonic shutdown time is decreased according to a preset step length when the second mahalanobis deviation exceeds the second threshold and the phase change platform duration is longer than the target platform duration and the center temperature fluctuation amplitude is smaller than the target fluctuation amplitude, and the updated ultrasonic shutdown time length is used for a next control cycle.
8. The microcrystalline resonance freezing system according to claim 1, wherein the main control unit performs on-line adaptive adjustment on the ultrasonic power, wherein the actual temperature change rate, the duration of the phase change platform and the central temperature fluctuation amplitude are obtained based on a sliding time window in a preset phase change temperature region to form a third target feature vector, a target central temperature curve corresponding to a current freezing batch is obtained to obtain the third target feature vector, a third feature covariance matrix is obtained from a historical batch similar to the current batch, a third mahalanobis deviation is calculated, meanwhile, power sensitivity is obtained based on the ultrasonic power change and the temperature change rate change with a long adjacent time, when the third mahalanobis deviation exceeds a third threshold, the absolute value of the actual temperature change rate is smaller than the absolute value of the target temperature change rate, the duration of the phase change platform is longer than the target platform time, and the accumulated ultrasonic energy does not reach a preset upper limit, the ultrasonic power is increased according to a power increment, the ultrasonic power is increased according to the power sensitivity, the low fluctuation amplitude of the central temperature is larger than or the accumulated ultrasonic energy reaches the preset upper limit, the ultrasonic power is decreased according to the preset power increment, and the updated ultrasonic power is used for the next control period.
9. The microcrystalline resonance freezing system according to claim 1, wherein the main control unit is configured to perform intermittent beat linkage modulation of the output of the refrigerating unit and the ultrasonic vibrator when the central temperature enters a preset phase change temperature region and the temperature change rate meets a preset threshold.
10. The microcrystalline resonance refrigerating system according to claim 1, wherein in the main control unit, the intermittent beat linkage modulation mode of the refrigerating unit output and the ultrasonic vibrator is specifically that when the seafood center temperature enters a preset phase change temperature zone and the temperature change rate meets a preset threshold value, the ultrasonic vibrator is placed in a periodic intermittent working mode of starting time and stopping time, and the refrigerating unit output is set as a starting section output and a stopping section output in a sectional mode according to the intermittent beat; in the starting section of each period, the output of the refrigerating unit is set as a high output gear, the high output gear is realized by increasing the variable frequency rotating speed driving duty ratio of the compressor of the refrigerating unit, at least one of the evaporation temperature setting down regulation and the throttle valve opening increase is synchronously executed, meanwhile, the rotating speed of the circulating fan is set as a high air quantity gear, in the stopping section of each period, the output of the refrigerating unit is set as a reference output gear or a slow-down output gear, the reference output gear or the slow-down output gear is realized by reducing the variable frequency rotating speed driving duty ratio of the compressor of the refrigerating unit, at least one of the evaporation temperature setting back-up and the throttle valve opening decrease is synchronously executed, meanwhile, the rotating speed of the circulating fan is set as a medium-speed gear, and the upper limit constraint is respectively applied to the rotating speed change rate of the compressor, the evaporation temperature setting change rate and the rotating speed change rate of the circulating fan between the starting section and the stopping section, and the self-adaption correction is carried out on the gear difference between the high output gear and the reference output gear based on the central temperature fluctuation amplitude and the continuous duration of the platform.

Description

Microcrystal resonance refrigerating system Technical Field The invention relates to the technical field of refrigeration, in particular to a microcrystalline resonance refrigeration system. Background The invention patent of China with the publication number of CN112503815A discloses an ultrasonic auxiliary freezing ice maker and a control method thereof, the ice maker adds the effect of ultrasonic waves in the process of condensing water into ice, the mechanical effect and cavitation effect of the ultrasonic waves are utilized to accelerate the formation and growth of ice nuclei, thereby shortening the icing time and improving the ice making efficiency, an ultrasonic generating device is started when the temperature reaches the phase-change temperature required by the nucleation of the ice maker in real time, the ultrasonic generator is controlled to work according to a certain frequency in the whole phase-change time period, the ice making time of the ice maker can be shortened, the energy consumption in the ice making process can be effectively reduced, but the ice making object of the invention is a phase-change system of single water placed in a regular ice grid, the seafood is a heterogeneous solid food in the freezing process, the shape and the size are discrete, salt-containing solutes, free water and combined water coexist, the cores and the phase-change stages of different seafood in the same cavity are greatly different, if the temperature reaches the phase-change stage, and the drawers are taken away, the heat and the ice are frequently opened, the ice is not covered by a plurality of layers, the ice-making film is easily filled, the ice is not filled up by the ice-making material, the ice is easily filled with the ice-making material, and the ice is not easy to be filled with the ice-filled with the ice food, and the ice is not easy to be filled with the ice-frozen, and the ice food is not easy to be stacked, and the ice-frozen; meanwhile, the freezing of the seafood controls the size and the distribution of ice crystals, reduces the water loss and the tissue damage, if the ultrasonic parameters are not matched with the action window, the local cavitation of the seafood products and the puncturing of cell membranes by the oversized ice crystals can be caused, thereby affecting the taste and the juice yield of the seafood, the phase change platform of the seafood is asynchronous with the core temperature, the surface temperature and the cavity temperature, the single-point temperature is difficult to stably judge that the seafood enters or is pushed out of the phase change window, the ultrasonic action period is easily deviated, the ineffectiveness consumption is generated, and the quality of the seafood is also influenced. Disclosure of Invention The invention aims to solve the technical problem of providing a microcrystalline resonance refrigerating system, which is characterized in that ultrasonic intermittent beats are linked with the output of a refrigerating unit in a seafood phase change window, and ultrasonic on-off time and power are optimized in an online self-adaptive manner, so that the phase change platform and total freezing time are shortened, the ineffectiveness consumption is reduced, the central temperature fluctuation and local supercooling are inhibited, fine and uniform ice crystals are formed, the drip loss is reduced, and the taste of frozen seafood is improved. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a microcrystalline resonance refrigerating system, including freezing chamber, refrigerating unit, the tray, ultrasonic vibrator, temperature detection unit and master control unit, refrigerating unit and freezing chamber heat transfer are connected, ultrasonic vibrator includes a plurality of ultrasonic transducer, lay in the tray below and couple to seafood through leading the sound layer, temperature detection unit includes chamber temperature sensor and seafood center temperature probe, master control unit is when center temperature gets into and predetermines looks alternating temperature district and temperature change rate satisfies and predetermineeing the threshold value, control ultrasonic vibrator is according to predetermineeing the long intermittent type work of start-up time and predetermineeing the shut-down time duration to carry out the coordinated modulation to refrigerating unit output in step. In the seafood freezing process, the key of quality determination is that the nucleation number and crystal growth rate of ice crystals in the phase change stage are low, if nucleation points are few and the phase change platform period is long, moisture can preferentially grow into coarse ice crystals outside cells and squeeze cell structures, so that thawing drip loss is increased, seafood taste is poor, the phase change temperature area is identified through the cavity tem