CN110281739B - Heat management system of phase change cold accumulation plate based on embedded heat pipe heat transfer enhancement - Google Patents
Heat management system of phase change cold accumulation plate based on embedded heat pipe heat transfer enhancement Download PDFInfo
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- CN110281739B CN110281739B CN201910601650.4A CN201910601650A CN110281739B CN 110281739 B CN110281739 B CN 110281739B CN 201910601650 A CN201910601650 A CN 201910601650A CN 110281739 B CN110281739 B CN 110281739B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00492—Heating, cooling or ventilating [HVAC] devices comprising regenerative heating or cooling means, e.g. heat accumulators
- B60H1/005—Regenerative cooling means, e.g. cold accumulators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/20—Refrigerated goods vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
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- Public Health (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a thermal management system of a phase change cold accumulation plate based on heat transfer enhancement of an embedded heat pipe, which is applied to a refrigerator car and comprises a rapid cold charging subsystem, wherein the rapid cold charging subsystem is used for supplementing cold energy to a gravity heat pipe in the cold accumulation plate of the refrigerator car; the rapid cooling subsystem comprises a hollow cooling groove and a refrigeration house refrigerating unit; the cold-carrying working medium is pre-contained in the cold charging groove; the gravity heat pipe embedded frame is arranged in the cooling groove; the gravity heat pipe embedded frame is provided with a plurality of embedded grooves; each embedded groove is communicated with the cooling filling groove; a gravity heat pipe is embedded in each embedded groove; the heat exchange tube is arranged in the cooling groove; the refrigerant outlet of the refrigeration house refrigerating unit is connected with the refrigerant inlet of the evaporator; a refrigerant outlet of the evaporator is connected with the upper end of the heat exchange tube; the lower end of the heat exchange tube penetrates through the cold charging groove and then is connected with a refrigerant inlet of the refrigeration house refrigerating unit. The invention can rapidly and reliably supplement the cold energy in the refrigerator body of the refrigerator car, and ensure that the refrigerator body has good refrigeration temperature.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a thermal management system of a phase change cold accumulation plate based on heat transfer enhancement of an embedded heat pipe.
Background
At present, refrigerated transportation is an important link in a cold chain logistics system, and refrigerated or fresh-keeping goods are transported by a refrigerator box provided with a refrigerating system, so that the refrigerated or fresh-keeping goods have irreplaceable functions in the aspects of cold chain commodity transportation and quality guarantee.
In recent years, with the rapid development of cold chain logistics in China, the demand of cold storage transportation is rapidly increased, but the cold storage transportation in China still has the problems of low transportation concentration, low transportation efficiency, high cost and the like. At present, the comprehensive circulation rate of the cold chain in China is only 19%, and a large quantity of cold chain commodities directly enter markets and consumption terminals without passing through a cold storage transportation link, particularly the distribution process of the cold chain terminal link is very weak, and the cold chain comprehensive circulation rate is not related to the rapid development and variable demands of the cold storage transportation technology in China. Therefore, the research and development of the refrigeration transportation equipment which is more suitable for basic national conditions such as road transportation, goods transportation and the like in China has great significance for the development of cold chain logistics in China.
Along with the continuous improvement of environmental protection requirements, the vapor compression refrigeration system for refrigerated transportation has the problem that the technology combining cold accumulation and renewable energy sources does not need a refrigerant and has no environmental protection because the pressure of updating and upgrading to be faced is also larger and larger, and is an important development direction of the refrigerated transportation technology. However, the logistics industry is facing the trouble of multi-batch and small-batch logistics, the traditional cold accumulation plates have long complete freezing time, a large number of completely frozen cold accumulation plates need to be prepared in advance for realizing frequent use of the cold accumulation plates, but the problems of high cold energy consumption, large batch of cold accumulation plates to be replaced simultaneously, large size of the cold accumulation plates to be replaced and the like in the cold chain logistics process are still difficult to solve.
Disclosure of Invention
The invention aims at solving the technical defects existing in the prior art and provides a thermal management system of a phase change cold accumulation plate based on heat transfer enhancement of an embedded heat pipe.
Therefore, the invention provides a thermal management system of a phase change cold accumulation plate based on heat transfer enhancement of an embedded heat pipe, which is applied to a refrigerator car and comprises a rapid cold charging subsystem, wherein the rapid cold charging subsystem is used for supplementing cold energy for a gravity heat pipe in the cold accumulation plate of the refrigerator car;
The rapid cooling subsystem comprises a hollow cooling groove and a refrigeration house refrigerating unit;
The cold-carrying working medium is pre-contained in the cold charging groove;
the cold charging groove is internally provided with a gravity heat pipe embedded frame which is transversely distributed;
The gravity heat pipe embedded frame is provided with a plurality of embedded grooves with upward openings and open front and rear sides;
each embedded groove is communicated with the cooling filling groove;
Gravity heat pipes which are vertically distributed are embedded in each embedded groove;
the heat exchange tubes are distributed up and down in the cooling tank;
The refrigerant outlet of the refrigeration house refrigerating unit is connected with the refrigerant inlet of the evaporator;
a refrigerant outlet of the evaporator is connected with the upper end of the heat exchange tube;
the lower end of the heat exchange tube is connected with a refrigerant inlet of the refrigeration house refrigerating unit through a hollow connecting pipeline after penetrating through the cold charging groove in a sealing way.
Wherein, a stirrer is also arranged in the cooling tank;
The stirring wheel of the stirrer is positioned in the cold-carrying working medium in the cold charging groove.
Wherein, the system also comprises a refrigeration subsystem;
The refrigeration subsystem is specifically a cold accumulation plate of a refrigerator car and comprises a hollow box body;
The inner cavity of the box body is a phase change material immersed area, and a phase change cold storage material is injected into the phase change material immersed area in advance;
A plurality of gravity heat pipes vertically penetrate through the inside of the box body;
The lower part of the gravity assisted heat pipe protrudes out of the bottom surface of the box body.
Wherein the shell of the box body is a sealed hollow heat-insulating shell.
The gravity assisted heat pipes protrude out of the outer wall of the part of the bottom surface of the box body and are tightly attached to the fins which are horizontally distributed.
The bottom of the box body is also connected with a hollow air duct bracket;
the lower part of the gravity assisted heat pipe protrudes out of the bottom surface of the box body and the fins and is positioned in the air duct bracket;
The left end and the right end of the air duct bracket are respectively provided with an air outlet and an air inlet;
a fan is arranged on the air inlet.
Wherein, the intelligent temperature control and air supply quantity adjusting subsystem is also included;
The intelligent temperature control and air supply quantity adjusting subsystem comprises a central processing unit, an electromagnetic valve, a meteorological information acquisition module, a mobile terminal, a network communication module and a temperature sensor, wherein:
The weather information acquisition module is connected with the mobile terminal;
The mobile terminal is connected with the network communication module;
The network communication module is in bidirectional connection with the central processing unit;
the temperature sensor is connected with the central processing unit;
The central processing unit is connected with the electromagnetic valve;
the central processing unit and the electromagnetic valve are respectively connected with the fan;
The weather information acquisition module is used for acquiring real-time weather information of the passing points on the running route of the refrigerated truck and then sending the real-time weather information to the mobile terminal;
the mobile terminal is used for transmitting the received real-time weather information of the passing points on the running route of the refrigerated truck to the central processing unit through the network communication module;
The temperature monitoring system comprises a plurality of temperature sensors serving as temperature monitoring modules, a central processing unit and a control unit, wherein the temperature sensors are arranged on the inner side and the outer side of a compartment of the refrigerated vehicle and used for monitoring the environmental temperature in the compartment of the refrigerated vehicle and the outside of the compartment in real time and then sending the environmental temperature to the central processing unit;
And the central processing unit is used for controlling the working state of a fan arranged on the cold accumulation plate of the refrigerated vehicle according to the received real-time weather information, the received environmental temperature information in the compartment and the received environmental temperature information outside the compartment, so that the air speed at the gravity heat pipe outside the control box body is adjusted, and the temperature in the compartment of the refrigerated vehicle is correspondingly adjusted.
Four cold accumulation plates of the refrigerator car are equidistantly arranged on the left side of a carriage of the refrigerator car, three cold accumulation plates of the refrigerator car are equidistantly arranged on a right side door removing part, a separation plate is arranged on the middle part of the carriage, and one cold accumulation plate of the refrigerator car is arranged on the separation plate;
the carriage door is arranged on the right side surface and the rear surface of the carriage of the refrigerator car.
Compared with the prior art, the heat management system based on the phase change cold accumulation plate with enhanced heat transfer of the embedded heat pipe can quickly and reliably supplement cold energy in the refrigerator body of the refrigerator car, ensures good refrigeration temperature in the refrigerator body, is energy-saving and environment-friendly, and has great production practice significance.
Drawings
Fig. 1 is a schematic structural diagram of a rapid cooling subsystem for supplementing cooling energy to a cold accumulation plate (specifically, a gravity assisted heat pipe 10) of a refrigerator car in a thermal management system based on an embedded heat pipe heat transfer enhanced phase change cold accumulation plate provided by the invention;
Fig. 2 is a schematic structural diagram of an embodiment of a cold accumulation plate (i.e. as a refrigeration system) of a refrigerator car in a thermal management system based on an embedded heat pipe heat transfer enhanced phase change cold accumulation plate according to the present invention;
FIG. 3 is a schematic diagram of an intelligent temperature control and air supply volume regulating system according to an embodiment of a thermal management system of a phase change cold accumulation plate based on heat transfer enhancement of an embedded heat pipe provided by the invention;
Fig. 4 is a schematic diagram showing a placement position of a cold accumulation plate in a compartment of a refrigerator car in a thermal management system of a phase change cold accumulation plate based on heat transfer enhancement of an embedded heat pipe according to the present invention.
Detailed Description
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the drawings and embodiments.
Referring to fig. 1 to 4, the invention provides a thermal management system of a phase change cold accumulation plate based on heat transfer enhancement of an embedded heat pipe, which is applied to a refrigerator car and comprises a rapid cold charging subsystem, wherein the rapid cold charging subsystem is used for supplementing cold energy to the cold accumulation plate of the refrigerator car (particularly a gravity heat pipe 10 therein);
the rapid cooling subsystem comprises a hollow cooling groove 4 and a refrigeration house refrigerating unit 5;
the cold charging groove 4 is pre-filled with a cold carrying working medium (glycol water solution) 3;
the cold charging groove 4 is internally provided with a gravity heat pipe embedded frame 100 which is transversely distributed;
The gravity assisted heat pipe embedding frame 100 is provided with a plurality of embedding grooves 101 with upward openings and open front and rear sides;
each embedded groove 101 is communicated with the cold charging groove 4, and is filled with a cold carrying working medium (such as glycol water solution) 3;
Each embedded groove 101 is embedded with gravity heat pipes 10 which are vertically distributed (when the gravity heat pipes 1 in the cold accumulation plate of the refrigerator car are required to be supplemented with cold energy, the gravity heat pipes are inserted into the embedded grooves 101 according to the cold energy supplementing requirement of a user);
the heat exchange tubes 60 are distributed up and down in the cooling tank 4;
The refrigerant outlet of the refrigeration house refrigeration unit 5 is connected with the refrigerant inlet of the evaporator 6;
a refrigerant outlet of the evaporator 6 is connected with the upper end of the heat exchange tube 60;
the lower end of the heat exchange tube 60 is connected with the refrigerant inlet of the refrigeration house refrigeration unit 5 through a hollow connecting pipeline after penetrating through the cold charging groove 4 in a sealing way.
The gravity assisted heat pipe 10 is an important component of the cold accumulation plate, and is filled with a working medium (ammonia or freon). In order to supplement cold energy to the gravity assisted heat pipe 10 in the cold storage plate of the refrigerator car, the gravity assisted heat pipe 10 in the cold storage plate is placed in the embedded groove 101 in the cold charging groove 4, then the gravity assisted heat pipe 10 in the cold storage plate can be rapidly supplemented, and the refrigerator car can be reused after supplementing, namely, the refrigerator car cold storage plate is installed (for example, shown in fig. 2) and reused, and the refrigerating function of the refrigerator car cold storage plate is exerted.
For the present invention, the evaporator 6 is connected to the cooling tank 4 through the heat exchange tube 60, and is used for providing cooling energy for the cooling medium 3, so that the temperature of the cooling medium 3 is reduced to reach the target temperature, and the rapid cooling process is completed.
In the invention, in particular implementation, the refrigeration unit 5 of the refrigeration house can be a common refrigeration system, and comprises main functional components of the refrigeration system, such as a compressor, a condenser and a throttle valve, and in addition, the evaporator 6 is also an important functional component of the refrigeration house and works in cooperation with other components;
Wherein the refrigerant outlet of the compressor is communicated with the refrigerant inlet of the condenser, the refrigerant outlet of the condenser is communicated with the refrigerant inlet of the evaporator 6 through a throttle valve, and the refrigerant outlet of the evaporator 6 is communicated with the refrigerant inlet of the compressor through a heat exchange tube 60.
The power source of the compressor can be a generator (i.e. an internal power supply) in the refrigerator car or any external power supply capable of providing driving voltage.
The compressor is used to compress a low-temperature low-pressure refrigerant into a high-temperature high-pressure refrigerant, and the refrigerant is condensed by the condenser and then enters the evaporator 6 to be evaporated, so that the heat exchange tube 60 connected to the evaporator 6 is supplied with cold energy.
In the invention, the evaporator 6 can be a fin evaporator with the model of 1P-200P manufactured by hundreds of cold and warm air conditioning equipment limited companies, and can be a fin evaporator manufactured by other manufacturers and meeting the requirements of the patent;
in the invention, the compressor in the refrigeration storage refrigerating unit can be a sealed compressor with the model of 2V32S225AUA manufactured by Dongguan Lin Chang refrigeration machinery electric equipment Co., ltd, and can be a compressor which is manufactured by other manufacturers and meets the requirements of the patent;
In the invention, more than one condenser with the model 020 manufactured by cold and warm air conditioning equipment limited company can be adopted as the condenser in the refrigeration storage refrigerating unit, and the condenser can be a condenser manufactured by other manufacturers and meeting the requirements of the patent;
In the invention, the throttle valve in the refrigeration unit of the refrigeration house can be a throttle valve with the model of SHE manufactured by Shanghai Xinchang cold and hot equipment Limited company, and can be a throttle valve which meets the requirements of the patent manufactured by other manufacturers.
In the invention, in particular implementation, a stirrer 2 is also arranged in the cooling tank 4;
the stirrer 2 is provided with stirring wheels which are positioned in a cold carrying working medium (such as glycol water solution) 3 in the cold charging groove 4.
The stirrer 2 includes a rotatable stirring wheel and a motor, and the motor drives the stirring wheel to rotate so as to force the cooling medium to flow.
In the invention, the invention also comprises a refrigeration subsystem in concrete implementation;
the refrigeration subsystem is specifically a cold accumulation plate 1 of a refrigerator car and comprises a hollow box body 7;
The inner chamber of the box body 7 is a phase change material immersed area 9, and a phase change cold storage material (for example, potassium fluoride tetrahydrate) is pre-injected into the phase change material immersed area 9;
a plurality of gravity assisted heat pipes 10 vertically penetrate through the inside of the box body 7;
the lower part of the gravity assisted heat pipe 10 protrudes from the bottom surface of the box 7.
In particular, the outer shell of the box body 7 is a sealed hollow heat-insulating shell.
In particular, the gravity assisted heat pipes 10 protrude from the outer wall of the bottom surface of the box 7, and are tightly attached (e.g., clamped) to the fins 11 distributed horizontally. Therefore, the heat transfer area between the portion of the gravity assisted heat pipe 10 protruding from the bottom surface of the case 7 and the outside air can be increased.
In the concrete implementation, the bottom of the box body 7 is also connected with a hollow air duct bracket 13;
the lower part of the gravity assisted heat pipe 10 protrudes out of the bottom surface of the box body 7 and the fins 11 are positioned in the air duct bracket 13.
In the concrete implementation, an air outlet 12 and an air inlet 14 are respectively formed at the left end and the right end of the air duct bracket 13;
The air inlet 14 is provided with a fan 15, and the fan 15 is used for blowing outside air into the air channel bracket 13 through the air inlet buckle 14.
Therefore, for the invention, the air driven by the fan 15 can only pass through the air duct bracket 13, and pass through the fins 11 and the outer surface of the gravity assisted heat pipe 10 for heat exchange, and then be discharged outwards from the air outlet 12.
In particular, the fan 15 is a variable frequency fan, and can realize multi-gear adjustment of the rotating speed of the fan, thereby realizing adjustment of air speed.
In the present invention, the part of the gravity assisted heat pipe 10 protruding from the bottom surface of the case 7 and the fins 11 are heated by the air driven by the fan 15, so that the heat exchange with the outside high-temperature air can be performed in summer. At this time, the working medium (ammonia or freon) in the gravity heat pipe 10 outside the box 7 (i.e. the part of the lower part of the gravity heat pipe 10 protruding out of the bottom surface of the box 7) is cooled by the air after heat exchange, and the air outlet 12 is discharged outwards, so as to realize the refrigeration effect, and the working medium (ammonia or freon) in the gravity heat pipe 10 outside the box 7 is evaporated into gas and enters the part of the gravity heat pipe 10 inside the box 7 (i.e. the gravity heat pipe inside the box 7);
Meanwhile, as the phase change cold storage material (for example, potassium fluoride tetrahydrate) is injected into the phase change material immersing area 9 in advance, the phase change cold storage material is filled in the box 7, one end of the gravity heat pipe 10 is connected with the box 7, and the other end of the gravity heat pipe is connected with the fins 11, so that heat transfer and condensation are carried out between working medium steam in the heat pipe 10 in the box 7 and the inner wall surface of the heat pipe 10, and meanwhile, heat transfer is carried out between the outer wall of the heat pipe in the box 7 and the phase change cold storage material in the phase change cold storage material immersing area 9, so that the phase change cold storage material is melted, and the whole refrigerating process is completed.
In the invention, the intelligent temperature control and air supply quantity adjusting subsystem is also included in the concrete implementation;
The intelligent temperature control and air supply quantity regulation subsystem comprises a central processing unit 16, an electromagnetic valve 17, a meteorological information acquisition module 18, a mobile terminal 19, a network communication module 20 and a temperature sensor 21, wherein:
the weather information acquisition module 18 is connected with the mobile terminal 19;
a mobile terminal 19 connected to the network communication module 20;
The network communication module 20 is connected with the central processing unit 16 in a bidirectional manner;
The temperature sensor 21 is connected with the central processing unit 16;
The central processing unit 16 is connected with the electromagnetic valve 17;
the central processing unit 16 and the electromagnetic valve 17 are respectively connected with the fan 15;
Among the above modules, the weather information acquiring module 18 is configured to acquire real-time weather information of the passing points on the traveling route of the refrigerated vehicle, and then send the real-time weather information to the mobile terminal 19;
A mobile terminal (e.g. a mobile phone) 19, configured to send the received real-time weather information of the passing point on the travelling route of the refrigerated vehicle to the central processing unit 16 through the network communication module 20 (e.g. a 4G communication module);
A plurality of temperature sensors 21 as temperature monitoring modules installed at both sides inside and outside the cabin of the refrigerator car for monitoring the ambient temperature inside and outside the cabin of the refrigerator car in real time and then transmitting to the central processor 16;
The central processing unit 16 is configured to intelligently control an operating state of the fan 15 provided in the cold accumulation plate of the refrigerated vehicle (for example, control a rotation speed of the fan 15, and adjust a temperature in the compartment of the refrigerated vehicle by storing a plurality of different real-time weather information, a plurality of different environmental temperature information in the compartment and outside the compartment in advance, and a corresponding relationship, for example, a one-to-one correspondence relationship, between the plurality of different fan rotation speeds) according to the received real-time weather information, the environmental temperature information in the compartment and outside the compartment, by using a neural network algorithm, thereby adjusting an air speed at a gravity heat pipe outside the control box, correspondingly adjusting a cooling capacity of the cold accumulation plate, realizing adjustment of a cooling capacity of the cold accumulation plate, and realizing intelligent adjustment of a temperature in the compartment of the refrigerated vehicle. Finally, an intelligent temperature control and air supply quantity adjusting system is formed.
In the invention, the placement position of the cold accumulation plates 1 of the refrigerated vehicle can be that four cold accumulation plates 1 of the refrigerated vehicle are placed at equal intervals on the left side of a carriage 30 of the refrigerated vehicle, three cold accumulation plates of the refrigerated vehicle are placed at equal intervals on the right side except a door part, a partition plate is arranged in the middle part of the carriage 30, the cold accumulation plates 1 of the refrigerated vehicle are placed on the partition plate, and carriage doors are arranged on the right side surface and the rear surface of the carriage 30 of the refrigerated vehicle. Thus, the temperature in the refrigerator carriage is prevented from being uneven because the cold energy cannot be timely supplemented or reduced. And the non-uniformity of the temperature field in the carriage caused by the single air supply outlet of the fan in the traditional refrigeration equipment can be avoided. The design method improves the uniformity of the temperature field in the box and ensures the quality of transported goods.
It should be noted that, for the present invention, the phase change cold accumulation plate based on heat transfer enhancement of the embedded heat pipe is adopted, which aims at the problems encountered in the existing logistics industry, comprehensively considers various factors, and is characterized by energy saving, rapid and accurate cold energy supplement and optimization of the uniformity of the temperature field in the box, and a patent proposal is provided.
Compared with the prior art, the heat management system of the phase change cold accumulation plate based on the embedded heat pipe heat transfer enhancement has the following beneficial effects:
1. The invention couples heat transfer with the phase change material through the embedded heat pipe element (namely the gravity heat pipe), and simultaneously arranges a fan and an air duct at the position of the heat pipe outside the device, so as to realize rapid and accurate cold energy supplement in the refrigerating and transporting process by utilizing the air supply quantity adjustment at the air side.
2. The cold accumulation plate adopts the phase change cold accumulation working medium (CaCl 2 solution), has higher heat conductivity coefficient, can generate larger latent heat value in the phase change process, has small volume change during phase change, has lower material price, has no toxicity, no corrosion and no pollution, has small volume and light weight, is convenient to mount and dismount, has proper phase change temperature in the CaCl 2 solution, and can realize the cold storage and transportation of foods with different storage temperatures.
3. According to the invention, at night, the phase change cold accumulation plate is subjected to cold charging in the cold storage provided with the rapid cold charging device, so that the cold charging time is greatly shortened, the cold storage plate is combined with renewable energy sources and peak-to-valley electricity price systems, the cold storage transportation cost is reduced, the policies of energy conservation and emission reduction are responded, and the problems of rapid energy consumption and large-scale cold accumulation plate replacement in the cold chain logistics process are solved.
4. The refrigerating system adopts the delta wing corrugated fins, so that the forced convection heat exchange of the cold accumulation plate and the air in the carriage is enhanced, the fins enable the air flow to flow along the surface of the fins in a zigzag way, the turbulence degree of the air flow is enhanced, and the surface heat exchange coefficient is improved.
5. The refrigerating system is applied to the refrigerated vehicle, the refrigerated vehicle can perform intelligent temperature control based on real-time weather information, and the working state of a cold accumulation plate fan of the refrigerated vehicle is intelligently controlled through a neural network algorithm according to the received real-time weather information, the environment temperature in the compartment and the outside of the compartment and the vehicle speed, so that the temperature in the compartment of the refrigerated vehicle is intelligently adjusted.
In summary, compared with the prior art, the heat management system based on the phase change cold accumulation plate with enhanced heat transfer of the embedded heat pipe provided by the invention can be used for rapidly and reliably supplementing cold energy in a refrigerator body of a refrigerator car, ensures good refrigeration temperature in the refrigerator body, is energy-saving and environment-friendly, and has great production practice significance.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (4)
1. The heat management system is applied to a refrigerator car and is characterized by comprising a rapid cooling subsystem, wherein the rapid cooling subsystem is used for supplementing cold energy for a gravity heat pipe (10) in the refrigerator car cold storage plate;
the rapid cooling subsystem comprises a hollow cooling groove (4) and a refrigeration house refrigerating unit (5);
the cold-carrying working medium (3) is pre-contained in the cold-charging groove (4);
the inside of the cooling groove (4) is provided with a gravity heat pipe embedded frame (100) which is transversely distributed;
The gravity heat pipe embedded frame (100) is provided with a plurality of embedded grooves (101) with upward openings and open front and rear sides;
Each embedded groove (101) is communicated with the cooling filling groove (4);
Gravity assisted heat pipes (10) which are vertically distributed are embedded in each embedded groove (101);
Heat exchange tubes (60) which are distributed up and down are arranged in the cooling tank (4);
a refrigerant outlet of the refrigeration house refrigerating unit (5) is connected with a refrigerant inlet of the evaporator (6);
a refrigerant outlet of the evaporator (6) is connected with the upper end of the heat exchange tube (60);
The lower end of the heat exchange tube (60) is connected with a refrigerant inlet of the refrigeration house refrigerating unit (5) through a hollow connecting pipeline after penetrating through the cold charging groove (4) in a sealing way;
The thermal management system further comprises a refrigeration subsystem;
the refrigeration subsystem is specifically a cold accumulation plate (1) of a refrigerator car and comprises a hollow box body (7);
the inner cavity of the box body (7) is a phase change material immersed area (9), and a phase change cold storage material is injected into the phase change material immersed area (9) in advance;
A plurality of gravity heat pipes (10) vertically penetrate through the inside of the box body (7);
The lower part of the gravity assisted heat pipe (10) protrudes out of the bottom surface of the box body (7);
the shell of the box body (7) is a sealed hollow heat-insulating shell;
the outer walls of the parts of the gravity heat pipes (10) protruding out of the bottom surface of the box body (7) are tightly attached to the fins (11) which are horizontally distributed;
The heat management system further comprises an intelligent temperature control and air supply quantity adjusting subsystem;
the intelligent temperature control and air supply quantity regulation subsystem comprises a central processing unit (16), an electromagnetic valve (17), a meteorological information acquisition module (18), a mobile terminal (19), a network communication module (20) and a temperature sensor (21), wherein:
the weather information acquisition module (18) is connected with the mobile terminal (19);
A mobile terminal (19) connected to the network communication module (20);
the network communication module (20) is in bidirectional connection with the central processing unit (16);
the temperature sensor (21) is connected with the central processing unit (16);
the central processing unit (16) is connected with the electromagnetic valve (17);
the central processing unit (16) and the electromagnetic valve (17) are respectively connected with the fan (15);
the weather information acquisition module (18) is used for acquiring real-time weather information of passing points on a running route of the refrigerated truck and then sending the real-time weather information to the mobile terminal (19);
the mobile terminal (19) is used for transmitting the received real-time weather information of the passing points on the running route of the refrigerated truck to the central processing unit (16) through the network communication module (20);
a plurality of temperature sensors (21) as temperature monitoring modules, which are installed on both sides inside and outside the compartment of the refrigerated vehicle, for monitoring the ambient temperature inside and outside the compartment of the refrigerated vehicle in real time, and then transmitting to the central processing unit (16);
And the central processing unit (16) is used for controlling the working state of a fan (15) arranged on the cold accumulation plate of the refrigerated vehicle according to the received real-time weather information, the received environmental temperature information in the compartment and the received environmental temperature information outside the compartment, so as to adjust the air speed at the gravity heat pipe outside the control box body and correspondingly adjust the temperature in the compartment of the refrigerated vehicle.
2. The thermal management system according to claim 1, characterized in that a stirrer (2) is also installed in the cooling tank (4);
the stirring wheel of the stirring machine (2) is positioned in the cold-carrying working medium (3) in the cold charging groove (4).
3. A thermal management system according to claim 1, wherein the bottom of the tank (7) is further connected to a hollow air duct support (13);
the lower part of the gravity assisted heat pipe (10) protrudes out of the bottom surface of the box body (7) and the fins (11) are positioned in the air duct bracket (13);
an air outlet (12) and an air inlet (14) are respectively arranged at the left end and the right end of the air duct bracket (13);
A fan (15) is arranged on the air inlet (14).
4. A thermal management system according to any one of claims 1 to 3, wherein four cold storage plates of a refrigerator car are placed equidistantly on the left side of a compartment (30) of the refrigerator car, three cold storage plates of a refrigerator car are placed equidistantly on the right side of the compartment (30), and a partition plate is installed at the middle part of the compartment (30), on which one cold storage plate of a refrigerator car is placed;
The compartment door is arranged on the right side surface and the rear surface of a compartment (30) of the refrigerated vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111141078B (en) * | 2020-01-19 | 2025-02-11 | 天津商业大学 | A refrigeration device for rapidly freezing cold storage plates |
| CN112248763A (en) * | 2020-11-28 | 2021-01-22 | 周立刚 | Refrigeration cold-storage system for refrigerator car |
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