CN-121828926-B - Overlapping rapid refrigerating system for ultralow-temperature smashing of mushrooms

CN121828926BCN 121828926 BCN121828926 BCN 121828926BCN-121828926-B

Abstract

The invention relates to the technical field of refrigeration equipment and discloses a cascade rapid refrigeration system for ultralow-temperature smashing of mushrooms, which comprises a cascade refrigeration circulating device, a pressure potential energy bypass component, a synchronous negative pressure clamping component, a control device and a control device, wherein the low-temperature stage loop is provided with an air suction buffer container, the pressure potential energy bypass component is used for establishing a transient liquid supply channel from a high-pressure liquid phase region to an evaporator, the synchronous negative pressure clamping component comprises a low-impedance pipeline and a clamping valve which are connected with an outlet of the evaporator and the air suction buffer container, and the control device is used for monitoring the change rate of load current so as to synchronously open a pulse valve and the clamping valve.

Inventors

WANG JIANLEI
WU JIAXIN
LI QIUSONG
SU TAIYU
CHEN BINGZHI
YAO JINGJING
LIN MIAOLI
AI YAPING
GUO LIBIN
ZHOU FUZHEN

Assignees

福建耘福食品有限公司

Dates

Publication Date: 20260512
Application Date: 20260313

Claims (10)

1. An cascade flash refrigeration system for ultra-low temperature crushing of mushrooms, comprising: The cascade refrigeration cycle device comprises a low-temperature-level refrigeration loop, wherein the low-temperature-level refrigeration loop is provided with a high-pressure liquid phase region, a low-pressure gas phase region and an evaporator for performing heat exchange with a crushing cavity of the crusher, and the low-pressure gas phase region is provided with an air suction buffer container; The pressure potential energy bypass assembly comprises a high-pressure liquid storage device and a pulse control valve, wherein an inlet of the high-pressure liquid storage device is communicated with the high-pressure liquid phase region, and the pulse control valve is arranged between the high-pressure liquid storage device and an inlet of the evaporator and is used for establishing a transient pressure difference liquid supply channel from the high-pressure liquid phase region to the evaporator; the synchronous negative pressure clamping assembly comprises a low-impedance bypass pipeline connected between a gas phase outlet of the evaporator and the suction buffer container and a clamping control valve arranged on the low-impedance bypass pipeline; The control device is electrically connected with a driving motor, a pulse control valve and a clamping control valve of the pulverizer respectively and is used for collecting the load current change rate of the driving motor, when the load current change rate exceeds a preset threshold value, the control device outputs an opening signal to the pulse control valve, the pressure difference between a high-pressure liquid phase region and an evaporator is utilized to drive the refrigerant in the high-pressure liquid reservoir to enter the evaporator for flash evaporation, the opening signal is synchronously output to the clamping control valve, the evaporator is communicated with an air suction buffer container, and a transient low-flow-resistance discharge channel which is communicated with the air suction buffer container through the evaporator is established.
2. The cascade rapid cooling system for ultralow temperature crushing of mushroom according to claim 1, wherein the high-pressure liquid reservoir is internally provided with a regenerative exchange assembly, a return air pipeline of the low-temperature stage cooling circuit passes through the regenerative exchange assembly, and the low-temperature gaseous refrigerant in the return air pipeline is used for sensible cooling of the high-pressure liquid refrigerant stored in the high-pressure liquid reservoir.
3. An cascade flash refrigeration system for cryogenic grinding of mushrooms according to claim 1, wherein the control means is configured to control the opening duration of the clamp control valve to be greater than or equal to the opening duration of the pulse control valve.
4. The cascade flash refrigeration system for cryogenic crushing of mushrooms according to claim 1, wherein the low-impedance bypass line is directly connected to the expansion chamber of the suction buffer vessel, and the internal diameter of the low-impedance bypass line is 1.5 to 2.5 times the internal diameter of the return line of the low-temperature stage refrigeration circuit.
5. An cascade flash refrigeration system for cryogenic crushing of mushrooms according to claim 1, wherein the control means is provided with a nonlinear timing matching logic which defines the opening duration of the pulse control valve Rate of change with load current The following relation is satisfied: , wherein, For a real-time acquisition of the load current rate of change, In order to set the threshold value in advance, For the preset response coefficient to be a preset value, For a preset nonlinear gain index, The preset basic action time of the pulse control valve.
6. The cascade flash refrigeration system for cryogenic crushing of mushrooms according to claim 1, wherein the low-temperature stage refrigeration circuit further comprises a maintenance throttling assembly connected in parallel with the pressure potential energy bypass assembly between the high-pressure liquid phase region and the evaporator for providing a base refrigeration flow to the evaporator in a pulse control valve closed state.
7. The cascade rapid cooling system for ultra-low temperature crushing of mushroom according to claim 1, wherein the control device comprises a differential signal extraction circuit for monitoring the phase current of the driving motor in real time, filtering steady-state fluctuation signals with frequency lower than 10Hz, and extracting transient high frequency components corresponding to mechanical impact as a basis for calculating the load current change rate.
8. The cascade refrigeration system for ultralow temperature crushing of mushroom according to claim 1, wherein the cascade refrigeration cycle device further comprises a high-temperature-stage refrigeration loop and an intermediate condensation evaporator connecting the high-temperature-stage refrigeration loop and the low-temperature-stage refrigeration loop, and the inlet of the high-pressure liquid storage device is directly communicated with the low-temperature-stage condensation outlet of the intermediate condensation evaporator.
9. The cascade flash refrigeration system for ultralow temperature crushing of mushrooms according to claim 1, wherein the pulse control valve and the clamp control valve are both direct-acting low-temperature electromagnetic valves, the response time of the direct-acting low-temperature electromagnetic valves is less than or equal to 20 milliseconds, and the flow coefficient of the clamp control valve is greater than that of the pulse control valve.
10. The cascade flash refrigeration system for ultra-low temperature crushing of mushrooms according to claim 1, wherein the evaporator is a jacket type heat exchanger or a coil type heat exchanger wrapped on the outer wall of the crushing cavity, and the refrigerant inlet of the evaporator is arranged at a space position corresponding to the mechanical impact concentration area in the crushing cavity.

Description

Overlapping rapid refrigerating system for ultralow-temperature smashing of mushrooms Technical Field The invention relates to an overlapping rapid refrigerating system for ultralow-temperature crushing of mushroom, and belongs to the technical field of refrigerating equipment. Background In the current ultra-micro pulverizing technology of mushroom Chinese medicinal materials such as lucid ganoderma, cordyceps sinensis and the like, in order to prevent heat-sensitive active ingredients such as polysaccharide, triterpene and the like from being degraded due to mechanical friction, a pulverizing cavity is required to be maintained in a cryogenic temperature environment, the existing industrial-grade ultra-low-temperature pulverizing equipment adopts an overlapping refrigerating system, mechanical heat is absorbed by wrapping an evaporator on the outer wall of the pulverizing cavity by utilizing multistage compression refrigeration circulation, the system is designed based on steady-state heat load, a feedback signal is collected by means of a temperature sensor arranged in the cavity or a pipeline, the opening of an electronic expansion valve is regulated to maintain the target temperature, when the high-fiber and high-toughness mushroom materials are processed, the pulverizing operation presents transient pulse characteristics, mechanical energy is converted into high-density point source heat in millisecond time along with the violent impact of the materials and a cutter, the traditional temperature feedback control logic is limited by the heat inertia of the sensor and the conduction time of cold energy in a metal wall surface, and is difficult to respond in time in the moment, so that local overtemperature occurs and the system does not act. Aiming at the problem of thermal response lag, the industry tries to introduce a feedforward control strategy based on the current load of a motor, and opens a valve to spray liquid refrigerant when detecting sudden load change, but the feedforward strategy still faces physical bottlenecks on the thermodynamic implementation level, for example, the patent of the utility model with the authority of CN222849507U discloses a cascade refrigeration system, the system is used for solving the problem of unsmooth oil return of the traditional oil-pressure compressor in a carbon dioxide system, an oil-free compressor is adopted for simplifying the system, the reliability is improved, the essence of a comparison file still belongs to a typical steady-state refrigeration cycle framework, the main concern is that the selection optimization of the refrigerant and the compressor is lacked, how to dredge the explosive gas phase working medium generated by instantaneous flash evaporation of the refrigerant when the pulse injection of the high-pressure refrigerant into the evaporator is not involved, the problem of instantaneous back pressure surge and heat transfer temperature difference attenuation inside the evaporator caused by the fact that the refrigerant is naturally unrestrained, and the simple pursuing of high-flow injection causes the liquid refrigerant to enter the evaporator in an insufficient supercooled state, a large amount of invalid flash gas is carried, the heat absorption efficiency of unit mass is reduced, the power of the compressor is increased, the problem of easy-return-flow efficiency of the refrigerant is relieved, the cost of the air return load and the steady-state operation is low, and the reliability is difficult when the steady-state operation load is caused. Therefore, how to construct a dynamic refrigeration mechanism for maintaining constant evaporation pressure and temperature under the conditions of avoiding the limitation of fixed flow resistance and millisecond thermal shock on the premise of not increasing hardware cost and energy consumption becomes the technical problem to be solved by the invention. Disclosure of Invention In order to solve the problems in the background technology, the technical scheme of the invention is as follows, an overlapping rapid refrigerating system for ultralow-temperature crushing of mushrooms, comprising: the cascade refrigeration cycle device comprises a low-temperature-level refrigeration loop, wherein the low-temperature-level refrigeration loop is provided with a high-pressure liquid phase region, a low-pressure gas phase region and an evaporator for performing heat exchange with a crushing cavity of the crusher, and the low-pressure gas phase region is provided with an air suction buffer container; The pressure potential energy bypass assembly comprises a high-pressure liquid storage device and a pulse control valve, wherein an inlet of the high-pressure liquid storage device is communicated with the high-pressure liquid phase region, and the pulse control valve is arranged between the high-pressure liquid storage device and an inlet of the evaporator and is used for establishing a transient pressure differe