CN114484966A - Chassis refrigerating system of vehicle-mounted refrigerator of LNG commercial automobile and control method - Google Patents
Chassis refrigerating system of vehicle-mounted refrigerator of LNG commercial automobile and control method Download PDFInfo
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- CN114484966A CN114484966A CN202210055672.7A CN202210055672A CN114484966A CN 114484966 A CN114484966 A CN 114484966A CN 202210055672 A CN202210055672 A CN 202210055672A CN 114484966 A CN114484966 A CN 114484966A
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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
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N3/00—Arrangements or adaptations of other passenger fittings, not otherwise provided for
- B60N3/10—Arrangements or adaptations of other passenger fittings, not otherwise provided for of receptacles for food or beverages, e.g. refrigerated
- B60N3/104—Arrangements or adaptations of other passenger fittings, not otherwise provided for of receptacles for food or beverages, e.g. refrigerated with refrigerating or warming systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
- F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
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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
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
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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
- F25D29/00—Arrangement or mounting of control or safety devices
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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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/008—Alarm devices
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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
- F25D2600/00—Control issues
- F25D2600/02—Timing
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses a chassis refrigeration system of an LNG commercial vehicle-mounted refrigerator and a control method, the chassis refrigeration system comprises the vehicle-mounted refrigerator and an LNG gas supply module, the LNG gas supply module is respectively connected with an engine gas supply module and the vehicle-mounted refrigerator through two pipelines, and the vehicle-mounted refrigerator comprises an LNG inlet connected with the LNG gas supply module through a pipeline and an LNG outlet connected with the engine gas supply module through a pipeline; and a control module used for controlling the on-off of the gas supply of the LNG gas supply module to the vehicle-mounted refrigerator is connected between the LNG gas supply module and the vehicle-mounted refrigerator. The chassis refrigeration system of the vehicle-mounted refrigerator of the LNG commercial automobile is designed into four modules including the vehicle-mounted refrigerator, the LNG gas supply module, the engine gas supply module and the control module, and the chassis refrigeration system is simple in structure, convenient to assemble and high in function integration level.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted refrigerators, in particular to a chassis refrigerating system of a vehicle-mounted refrigerator of an LNG commercial automobile and a control method.
Background
With the continuous improvement of the living standard of people and the rapid increase of the operation mileage of heavy trucks, the requirements of people on the vehicle-mounted refrigerator of the automobile for convenient travel are stronger. For a heavy truck driver, in order to bring convenience to diet in long-distance transportation and ensure that goods arrive at a destination on time, the vehicle-mounted refrigerator is very practical and urgent, but the conventional vehicle-mounted refrigerator generally adopts electric energy, is large in energy consumption and is limited in arrangement space.
The application number is 201410626816.5, and an LNG vehicle-mounted cold storage type roof radiation cold energy refrigerator is disclosed in a patent named LNG vehicle-mounted cold storage type roof radiation cold energy refrigerator, and comprises an LNG storage tank and a vehicle-mounted refrigerator, wherein the LNG storage tank is connected with the vehicle-mounted refrigerator through a connecting pipeline; the vehicle-mounted refrigerator comprises an outer shell, an inner shell, a heat exchanger, a cold plate, a push-pull drawer and a cold accumulation water tank; the inner shell is arranged inside the outer shell, and the heat exchanger, the cold plate, the push-pull drawer and the cold accumulation water tank are arranged in the inner shell; the cold plate is arranged at the lower part of the heat exchanger and is close to the heat exchanger, the push-pull drawer is arranged below the cold plate, and the cold storage water tank is arranged below the push-pull drawer. When the automobile runs, the LNG vaporization cold energy is continuously released, the water in the cold accumulation water tank is gradually frozen, a part of energy is accumulated in the ice, when the engine stops running, the LNG stops supplying, and the ice in the cold accumulation water tank melts and absorbs heat, so that the purpose of full-time cold supply is achieved. The outer shell and the inner shell are cylindrical, a vacuum heat-insulating layer is formed by vacuumizing between the outer shell and the inner shell, and the outer shell and the inner shell can be in closed contact through the vacuum heat-insulating layer. The LNG storage tank is connected with the heat exchanger through a connecting pipeline. The push-pull drawer is internally provided with a heat insulation plate, the heat insulation plate divides the push-pull drawer into a freezing chamber and a refrigerating chamber, and the heat insulation plate is provided with small holes. The lower end of the push-pull drawer is provided with a guide rail which is arranged on the inner shell. The cold plate is a radiation cold plate, the plate of the cold plate is a copper plate, and the aperture of the micropores of the cold plate is 0.1mm-5 mm. The cold accumulation water tank is provided with a slope. The heat exchanger adopts a stainless steel pipe with the inner diameter of 1 mm. The invention utilizes the LNG vaporization latent heat for refrigeration, on one hand, the LNG is vaporized to the safe combustion temperature and enters the engine through the temperature-adjusting pressure regulator, on the other hand, the refrigeration quantity is recovered and the residual energy is utilized, the energy consumption of the vehicle-mounted refrigerator is saved, and compared with the prior art, the energy-saving effect is obvious. The cold plate is made of copper, and the radiation of the cold plate can keep the temperature of the air in the refrigerator uniform. The inner shell and the outer shell of the vehicle-mounted refrigerator are provided with the vacuum heat insulation interlayer, and due to the lack of heat exchange media, the vacuum interlayer can well prevent heat loss, so that the heat insulation effect is improved. The ice cold storage tank can continuously provide cold for the refrigerator when the engine stops running, so that full-time continuous cold supply is realized. However, the refrigerator is complex in structure and low in overall commercial value, and the LNG is controlled by the temperature and pressure regulating chamber after passing through the refrigerator, so that the engine can burn conveniently. The scheme cost is improved, and the method is not suitable for commercial application.
Application number is 201510382160.1, the patent name "a modular LNG refrigerator air conditioning equipment" discloses a modular LNG refrigerator air conditioning equipment in, including LNG storage bottle and with the energy conversion device one of LNG storage bottle intercommunication, energy conversion device installs temperature sensor one on one, energy conversion device one leads to engine gas supply system, third party medium storage tank and inverter pump, inverter pump passes through temperature-sensing valve one and temperature-sensing valve two intercommunication cold and hot dual-purpose air conditioner and cold and hot dual-purpose refrigerator, install temperature sensor two and temperature sensor three in the cold and hot dual-purpose air conditioner, temperature sensor four is installed to the cold and hot dual-purpose refrigerator, cold and hot dual-purpose air conditioner with the cold and hot dual-purpose refrigerator intercommunication energy conversion device one, the inverter pump passes through temperature-sensing valve three intercommunication energy converter two, energy converter two with the engine water tank both-way intercommunication, and the second energy converter is communicated with the first energy conversion device through a fourth temperature control valve. The energy converter I, the variable frequency pump and the cold and hot dual-purpose air conditioner form a loop. The heat of the engine in the two cavities of the energy converter is larger than the cold of the LNG coil in the first cavity of the energy converter. The variable frequency pump, the cold air inlet, the cold diffuser, the air conditioner shell assembly and the cold air outlet are sequentially communicated, and the evaporation fan is sequentially communicated with the refrigerator shell assembly and the air conditioner shell assembly. The temperature control switch is electrically connected with the control panel, and the control panel is electrically connected with the temperature sensor II, the temperature sensor III and the temperature sensor IV. The device has adopted air conditioner, refrigerator integrated design, has combined air conditioner and refrigerator together, has simplified equipment, has improved the utilization ratio of equipment, carries out the optimal design from structural, has reduced the noise and the power consumption of equipment operation, has higher economic nature and practicality. The device adopts two temperature control systems, can provide refrigeration air conditioner and refrigerator function in summer, can also provide heating air conditioner and insulation can function in winter. The device still has the cold-storage function, under the prerequisite that does not increase the cold energy loss, temporarily stores the surplus cold volume that produces behind the LNG vaporization to the cold volume demand when meeting under the different driving operating modes and parking for a short time. But the device structure is complicated, and the assembly degree of difficulty is high, and the safe risk is great, is unfavorable for popularizing and applying.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provide a chassis refrigeration system of an LNG commercial automobile vehicle-mounted refrigerator and a control method, wherein the chassis refrigeration system is simple in structure, convenient to assemble and convenient to operate.
In order to achieve the purpose, the chassis refrigerating system of the vehicle-mounted refrigerator of the LNG commercial automobile, which is designed by the invention, comprises the vehicle-mounted refrigerator and an LNG air supply module, and is characterized in that: the LNG gas supply module is respectively connected with the engine gas supply module and the vehicle-mounted refrigerator through two pipelines, and the vehicle-mounted refrigerator comprises an LNG inlet connected with the LNG gas supply module through a pipeline and an LNG outlet connected with the engine gas supply module through a pipeline; and a control module used for controlling the on-off of the gas supply from the LNG gas supply module to the vehicle-mounted refrigerator is connected between the LNG gas supply module and the vehicle-mounted refrigerator.
Further, the LNG supply module comprises an LNG tank.
Further, the engine air supply module comprises a vaporizer connected with the LNG tank through a pipeline and a buffer tank connected with the vaporizer through a pipeline.
Further, on-vehicle refrigerator include the refrigerator casing with set up in heat exchanger in the refrigerator casing, the heat exchanger include through the pipeline with LNG gas pitcher is connected the LNG entry with through the pipeline with the engine gas supply module is connected the LNG export.
The control module has the following two forms:
the first form: the control module is an automatic control module, and the LNG outlet is connected with the buffer tank through a pipeline.
Specifically, the automatic control module is an electromagnetic valve.
The second form: the control module is a manual control module, and the LNG outlet is connected with the gasification tank through a pipeline.
Specifically, the manual control module is a manual valve.
The control method of the chassis refrigerating system based on the LNG commercial vehicle-mounted refrigerator comprises an automatic control method adopting an automatic control module and a manual control method adopting a manual control module;
specifically, the automatic control method comprises the steps of monitoring the temperature T in the buffer tank, sending a low-temperature alarm signal when the temperature T in the buffer tank is reduced to a set temperature T1, sending a closing signal to the automatic control module after the ECU receives the low-temperature alarm signal, closing the automatic control module, and stopping supplying gas to the vehicle-mounted refrigerator by the LNG gas supply module; monitoring the closing time t of the automatic control module, sending a signal that the closing time of the automatic control module reaches the standard when the closing time t of the automatic control module reaches a set time t1, sending an opening signal to the automatic control module after the ECU receives the signal that the closing time of the automatic control module reaches the standard, starting the automatic control module, and continuously supplying gas to the vehicle-mounted refrigerator by the LNG gas supply module;
specifically, the manual control method comprises the step of manually closing or opening the manual control module according to the air temperature and the actual use requirement.
Preferably, the T1 is-30 ℃.
The invention has the beneficial effects that: the chassis refrigeration system of the vehicle-mounted refrigerator of the LNG commercial automobile is designed into four modules including the vehicle-mounted refrigerator, the LNG gas supply module, the engine gas supply module and the control module, and the chassis refrigeration system is simple in structure, convenient to assemble and high in function integration level. Be provided with the heat exchanger in the on-vehicle refrigerator, the LNG entry through its heat exchanger structure of self is connected with LNG air feed module, and rethread pipeline connection LNG export and engine air feed module utilize the gasification endothermic characteristic of LNG with the refrigeration integration of on-vehicle refrigerator in engine air feed module, under the prerequisite that satisfies engine air feed demand, satisfied the refrigeration demand of on-vehicle refrigerator simultaneously. The engine gas supply module comprises a vaporizer connected with the LNG gas supply module through a pipeline and a buffer tank connected with the vaporizer through a pipeline, LNG enters the buffer tank after passing through the vaporizer, and the buffer tank supplies gas to the engine, so that complete gasification of the LNG is guaranteed, and the structure of the engine gas supply module is simplified. The control module is designed with two structural forms, including an automatic control module adopting an electromagnetic valve and a manual control module adopting a manual control valve, and an automatic control method and a manual control method are respectively designed based on the structural forms of the two control modules. The automatic control method comprises the steps of monitoring the temperature T in the buffer tank, sending a low-temperature alarm signal when the temperature T in the buffer tank is reduced to a set temperature T1, sending a closing signal to the automatic control module after the ECU receives the low-temperature alarm signal, closing the automatic control module to prevent the temperature in the buffer tank from being too low, ensuring normal air supply of the engine, keeping the temperature in the vehicle-mounted refrigerator low at the moment, and keeping the internal temperature of the vehicle-mounted refrigerator within a period of time so as to achieve the heat preservation function of internal food. The LNG gas supply module stops supplying gas to the vehicle-mounted refrigerator; monitoring the closing time t of the automatic control module, sending a signal that the closing time of the automatic control module reaches the standard when the closing time t of the automatic control module reaches a set time t1, sending an opening signal to the automatic control module after the ECU receives the signal that the closing time of the automatic control module reaches the standard, starting the automatic control module, and continuously supplying gas to the vehicle-mounted refrigerator by the LNG gas supply module; the time t1 can be set in the ECU in advance according to the heat preservation performance of the vehicle-mounted refrigerator and the outside temperature, so that the temperature in the vehicle-mounted refrigerator is constant and the air supply of the engine is normal while the energy consumption of the vehicle-mounted refrigerator is saved. The manual control method comprises the step of manually turning off or turning on the manual control module according to the air temperature and the actual use requirement. The manual control module can be manually closed in winter or when the vehicle-mounted refrigerator is not needed, so that the vehicle-mounted refrigerator is closed, energy is effectively saved, and the economical efficiency is good. The vehicle-mounted refrigerator does not need a conventional refrigeration structure, so that the assembly difficulty is reduced, the structure is simplified, and the cost is reduced.
Drawings
FIG. 1 is a module connection diagram of a chassis refrigeration automatic control system of an LNG commercial vehicle-mounted refrigerator in the invention;
FIG. 2 is a module connection diagram of a chassis refrigeration manual control system of an LNG commercial vehicle-mounted refrigerator in the invention;
FIG. 3 is a schematic view of the structure of the on-board refrigerator of the present invention;
FIG. 4 is a schematic structural view of a heat exchanger according to the present invention;
the system comprises a pipeline 1, an LNG inlet 2, an LNG outlet 3, an LNG tank 4, an LNG tank 5, a vaporizer 6, a buffer tank 7, a refrigerator shell 8, a heat exchanger 9, an electromagnetic valve 10, a manual control valve 11, an engine 12, a vehicle-mounted refrigerator 13, radiating fins 14, a refrigerator door 15, a heat insulation layer 16, a cold storage box 17, a refrigerating box 18 and a supporting blocking plate.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The chassis refrigeration system of the vehicle-mounted refrigerator of the LNG commercial vehicle shown in the figures 1-2 comprises a vehicle-mounted refrigerator 12, an LNG air supply module, an engine air supply module and a control module.
In the present invention, an LNG gas supply module is an LNG tank 4, an engine gas supply module is a vaporizer 5 and a buffer tank 6 connected by a pipeline, and a control module is an electromagnetic valve 9 or a manual valve 10.
As shown in fig. 1 to 2, the LNG tank 4 is connected to the vaporizer 5 and the on-vehicle refrigerator 1 through two lines 1. As shown in fig. 3 to 4, the in-vehicle refrigerator 12 includes a refrigerator case 7 and a heat exchanger 8 disposed in the refrigerator case 7, the heat exchanger 8 includes a heat exchange tube and a heat dissipating fin 13 disposed on the heat exchange tube, and the heat exchanger is fixed on a support blocking plate 18. The heat exchanger 8 comprises an LNG inlet 2 connected with an LNG tank 4 through a pipeline 1 and an LNG outlet 3 connected with the engine gas supply module through the pipeline 1; and a control module for controlling the on-off of the gas supply of the LNG tank 4 to the vehicle-mounted refrigerator 12 is connected between the LNG tank 4 and the vehicle-mounted refrigerator 12.
As shown in fig. 1, when the control module is a solenoid valve 9 (automatic control module), the LNG outlet 3 is connected to the buffer tank 6 through a pipe 1. When the control module is an electromagnetic valve 9 (automatic control module) and the LNG outlet 3 is connected with the buffer tank 6 through the pipeline 1, an automatic control method is designed based on the automatic control module at the moment: the method comprises the steps of monitoring the temperature T in a buffer tank 6, sending a low-temperature alarm signal when the temperature T in the buffer tank 6 is reduced to-30 ℃ which is a set temperature, sending a closing signal to an electromagnetic valve 9 after an ECU receives the low-temperature alarm signal, closing the electromagnetic valve 9, and stopping supplying gas to an on-vehicle refrigerator 12 by an LNG gas tank 4; monitoring the closing time t of the electromagnetic valve 9, sending a signal that the closing time of the electromagnetic valve 9 reaches the standard when the closing time t of the electromagnetic valve 9 reaches the set time t1, sending an opening signal to the electromagnetic valve 9 after the ECU receives the signal that the closing time of the electromagnetic valve 9 reaches the standard, opening the electromagnetic valve 9, and continuously supplying gas to the vehicle-mounted refrigerator 12 by the LNG tank 4. In this scheme, at first calculate the required energy of on-vehicle refrigerator 12 normal work, match gas supply (liquid) pipeline diameter and length, the gaseous gasification heat absorption in getting into on-vehicle refrigerator 12 of LNG, the gaseous buffer tank that gets into of LNG afterwards, LNG is gaseous state and temperature in suitable within range, satisfies the engine air feed demand to realize the commercial refrigerator scheme of an economy. Under the condition that the commercial vehicle runs for long time after carrying cargo, the LNG release refrigerating capacity is larger than the requirement of a refrigerator, the temperature of gas in the buffer tank 6 is lower than minus 30 ℃, low-temperature alarm is triggered, the electromagnetic valve 9 is automatically closed, and normal gas supply of the whole vehicle is guaranteed. According to the cold accumulation capacity of the cold accumulation box 16, the automatic opening time after the electromagnetic valve 9 is closed every time is set, so that the purpose of automatic control of refrigerator refrigeration is achieved, and the cold accumulation capacity of the cold accumulation box 16 can be comprehensively judged according to the material, the thickness and the external temperature of the heat insulation layer, and then a reasonable automatic opening time is set. If the heat insulation layer material is thick and the outside temperature is low, the automatic opening time of the electromagnetic valve 9 can be prolonged, and if the heat insulation layer material is thin and the outside temperature is high, the automatic opening time of the electromagnetic valve 9 can be shortened, so that the balance between the economy and the refrigeration performance can be achieved.
The following time t1 can be designed based on the cold storage capacity of the cold storage tank 16 and explained as an example:
in embodiment 1, when the outside temperature is lower than 0 ℃, the temperature T in the buffer tank 6 is monitored, when the temperature T in the buffer tank 6 is reduced to-30 ℃ which is the set temperature, a low-temperature alarm signal is sent, the ECU sends a closing signal to the electromagnetic valve 9 after receiving the low-temperature alarm signal, the electromagnetic valve 9 is closed, and the LNG tank 4 stops supplying gas to the vehicle-mounted refrigerator 12; monitoring the closing time t of the electromagnetic valve 9, sending a signal that the closing time of the electromagnetic valve 9 reaches the standard when the closing time t of the electromagnetic valve 9 reaches the set time for 30 minutes, sending an opening signal to the electromagnetic valve 9 after the ECU receives the signal that the closing time of the electromagnetic valve 9 reaches the standard, opening the electromagnetic valve 9, and continuously supplying gas to the vehicle-mounted refrigerator 12 by the LNG tank 4.
In embodiment 2, when the outside temperature is between 0 ℃ and 20 ℃, the temperature T in the buffer tank 6 is monitored, when the temperature T in the buffer tank 6 is reduced to the set temperature of-30 ℃, a low-temperature alarm signal is sent out, the ECU sends a closing signal to the electromagnetic valve 9 after receiving the low-temperature alarm signal, the electromagnetic valve 9 is closed, and the LNG gas tank 4 stops supplying gas to the vehicle-mounted refrigerator 12; monitoring the closing time t of the electromagnetic valve 9, sending a signal that the closing time of the electromagnetic valve 9 reaches the standard when the closing time t of the electromagnetic valve 9 reaches the set time for 20 minutes, sending an opening signal to the electromagnetic valve 9 after the ECU receives the signal that the closing time of the electromagnetic valve 9 reaches the standard, opening the electromagnetic valve 9, and continuously supplying gas to the vehicle-mounted refrigerator 12 by the LNG tank 4.
Embodiment 3, when the outside temperature is above 20 ℃, the temperature T in the buffer tank 6 is monitored, when the temperature T in the buffer tank 6 is reduced to the set temperature of-30 ℃, a low-temperature alarm signal is sent, the ECU sends a closing signal to the electromagnetic valve 9 after receiving the low-temperature alarm signal, the electromagnetic valve 9 is closed, and the LNG tank 4 stops supplying gas to the vehicle-mounted refrigerator 12; monitoring the closing time t of the electromagnetic valve 9, sending a signal that the closing time of the electromagnetic valve 9 reaches the standard when the closing time t of the electromagnetic valve 9 reaches the set time 10 minutes, sending an opening signal to the electromagnetic valve 9 after the ECU receives the signal that the closing time of the electromagnetic valve 9 reaches the standard, opening the electromagnetic valve 9, and continuously supplying gas to the vehicle-mounted refrigerator 12 by the LNG tank 4.
As shown in fig. 2, when the control module is a manual valve 10 (manual control module), the LNG outlet 3 is connected to the vaporizer 5 through a pipe 1. A manual control method is now designed based on the manual valve 10: including manually closing or opening the manual valve 10 depending on the air temperature and the actual use requirements. According to the scheme, firstly, the energy required by normal work of the vehicle-mounted refrigerator 12 is calculated, the diameter and the length of the gas (liquid) supply pipeline are matched, LNG gas is controlled to enter the vehicle-mounted refrigerator 12 to be gasified and absorb heat, and then the liquid and the gas are mixed to enter the vaporizer 5, so that the LNG enters the whole vehicle gas supply large circulation pipeline to work. In winter or under the environment that does not need refrigerator work, through closing manual valve 10, realize the control of cutting off the gas. In the case of satisfying the refrigeration of the in-vehicle refrigerator 12, the manual valve 10 realizes the air-cut control.
In conclusion, the chassis refrigeration system of the vehicle-mounted refrigerator of the LNG commercial automobile is designed into four modules including the vehicle-mounted refrigerator 12, the LNG gas supply module, the engine gas supply module and the control module, and the chassis refrigeration system is simple in structure, convenient to assemble and high in function integration level. Be provided with heat exchanger 8 in the on-vehicle refrigerator 12, LNG entry 2 through its heat exchanger structure of own is connected with LNG air feed module, connects LNG export 3 and engine air feed module through pipeline 1 again, utilizes the gasification endothermic characteristic of LNG to integrate the refrigeration of on-vehicle refrigerator 12 in engine air feed module, under the prerequisite that satisfies engine air feed demand, has satisfied the refrigeration demand of on-vehicle refrigerator 12 simultaneously. The engine gas supply module comprises a vaporizer 5 connected with the LNG gas supply module through a pipeline 1 and a buffer tank 6 connected with the vaporizer 5 through the pipeline 1, LNG enters the buffer tank 6 after passing through the vaporizer 5, and the buffer tank 6 supplies gas to the engine 11, so that complete gasification of the LNG is ensured, and the structure of the engine gas supply module is simplified. The control module is designed with two structural forms, including an automatic control module adopting an electromagnetic valve 9 and a manual control module adopting a manual control valve 10, and an automatic control method and a manual control method are respectively designed based on the structural forms of the two control modules. The automatic control method comprises the steps of monitoring the temperature T in the buffer tank 6, sending a low-temperature alarm signal when the temperature T in the buffer tank 6 is reduced to a set temperature T1, sending a closing signal to the automatic control module after the ECU receives the low-temperature alarm signal, closing the automatic control module, preventing the temperature in the buffer tank 6 from being too low, ensuring normal air supply of the engine 11, keeping the temperature in the vehicle-mounted refrigerator 12 low at the moment, and keeping the temperature in the vehicle-mounted refrigerator within a period of time, so that the heat preservation function of internal food is achieved. The LNG gas supply module stops supplying gas to the in-vehicle refrigerator 12; monitoring the closing time t of the automatic control module, sending a signal that the closing time of the automatic control module reaches the standard when the closing time t of the automatic control module reaches the set time t1, sending an opening signal to the automatic control module after the ECU receives the signal that the closing time of the automatic control module reaches the standard, starting the automatic control module, and continuously supplying gas to the vehicle-mounted refrigerator 12 by the LNG gas supply module; the time t1 can be set in the ECU in advance according to the heat preservation performance and the outside temperature of the vehicle-mounted refrigerator 12, so that the energy consumption of the vehicle-mounted refrigerator 12 is saved, and the temperature in the vehicle-mounted refrigerator 12 is constant and the air supply of the engine 11 is normal. The manual control method comprises the step of manually turning off or turning on the manual control module according to the air temperature and the actual use requirement. The manual control module can be manually closed in winter or when the vehicle-mounted refrigerator 12 is not needed, so that the vehicle-mounted refrigerator 12 is closed, energy is effectively saved, and the economical efficiency is good. The vehicle-mounted refrigerator 12 does not need a conventional refrigeration structure, so that the assembly difficulty is reduced, the structure is simplified, and the cost is reduced.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention should be considered to be within the scope of the present invention. Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.
The shapes, sizes, ratios, angles, and numbers disclosed to describe aspects of the specification and claims are examples only, and thus, the specification and claims are not limited to the details shown. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted. Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be in the singular but may also be in the plural.
The features of the various embodiments of the present invention may be partially or fully combined or spliced with each other and performed in a variety of different configurations as would be well understood by those skilled in the art. Embodiments of the invention may be performed independently of each other or may be performed together in an interdependent relationship.
Claims (10)
1. The utility model provides a chassis refrigerating system of on-vehicle refrigerator of LNG commercial vehicle, includes on-vehicle refrigerator (12) and LNG gas supply module, its characterized in that: the LNG air supply module is respectively connected with the engine air supply module and the vehicle-mounted refrigerator (12) through two pipelines (1), and the vehicle-mounted refrigerator (12) comprises an LNG inlet (2) connected with the LNG air supply module through the pipeline (1) and an LNG outlet (3) connected with the engine air supply module through the pipeline (1); and a control module used for controlling the on-off of the gas supply of the LNG gas supply module to the vehicle-mounted refrigerator (12) is connected between the LNG gas supply module and the vehicle-mounted refrigerator (12).
2. The chassis refrigeration system of an LNG commercial vehicle on-board refrigerator of claim 1, wherein: the LNG supply module comprises an LNG tank (4).
3. The chassis refrigeration system of the LNG commercial vehicle on-board refrigerator of claim 2, wherein: the engine air supply module comprises a vaporizer (5) connected with the LNG tank (4) through a pipeline (1) and a buffer tank (6) connected with the vaporizer (5) through the pipeline (1).
4. The chassis refrigeration system of an LNG commercial vehicle on-board refrigerator of claim 3, wherein: the vehicle-mounted refrigerator (12) comprises a refrigerator shell (7) and a heat exchanger (8) arranged in the refrigerator shell (7), wherein the heat exchanger (8) comprises an LNG inlet (2) connected with the LNG tank (4) through a pipeline (1) and an LNG outlet (3) connected with the engine gas supply module through a pipeline (1).
5. The chassis refrigeration system of an on-board refrigerator of an LNG commercial vehicle of claim 4, wherein: the control module is an automatic control module, and the LNG outlet (3) is connected with the buffer tank (6) through a pipeline (1).
6. The chassis refrigeration system of an LNG commercial vehicle on-board refrigerator of claim 5, wherein: the automatic control module is an electromagnetic valve (9).
7. The chassis refrigeration system of an LNG commercial vehicle on-board refrigerator of claim 4, wherein: the control module is a manual control module, and the LNG outlet (3) is connected with the gasification tank (5) through a pipeline (1).
8. The chassis refrigeration system of an LNG commercial vehicle on-board refrigerator of claim 7, wherein: the manual control module is a manual valve (10).
9. A control method of a chassis refrigerating system of an LNG commercial vehicle-mounted refrigerator is characterized by comprising the following steps: the method comprises an automatic control method adopting an automatic control module and a manual control method adopting a manual control module;
the automatic control method comprises the steps of monitoring the temperature T in the buffer tank (6), sending a low-temperature alarm signal when the temperature T in the buffer tank (6) is reduced to a set temperature T1, sending a closing signal to the automatic control module after the ECU receives the low-temperature alarm signal, closing the automatic control module, and stopping supplying gas to the vehicle-mounted refrigerator (12) by the LNG supply module; monitoring the closing time t of the automatic control module, sending an automatic control module closing time standard signal when the closing time t of the automatic control module reaches a set time t1, sending an opening signal to the automatic control module after the ECU receives the automatic control module closing time standard signal, starting the automatic control module, and continuously supplying gas to the vehicle-mounted refrigerator (12) by the LNG gas supply module;
the manual control method comprises the step of manually closing or opening the manual control module according to the air temperature and the actual use requirement.
10. The method for controlling a chassis refrigeration system of an LNG commercial vehicle refrigerator of claim 9, wherein: the T1 is-30 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210055672.7A CN114484966A (en) | 2022-01-18 | 2022-01-18 | Chassis refrigerating system of vehicle-mounted refrigerator of LNG commercial automobile and control method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104859404A (en) * | 2015-05-21 | 2015-08-26 | 中国第一汽车股份有限公司 | Comprehensive LNG (liquefied natural gas) cold energy recovery and utilization system for heavy-duty commercial vehicle |
| CN104864653A (en) * | 2015-05-21 | 2015-08-26 | 中国第一汽车股份有限公司 | Cold and warm box system for LNG fuel vehicle |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104859404A (en) * | 2015-05-21 | 2015-08-26 | 中国第一汽车股份有限公司 | Comprehensive LNG (liquefied natural gas) cold energy recovery and utilization system for heavy-duty commercial vehicle |
| CN104864653A (en) * | 2015-05-21 | 2015-08-26 | 中国第一汽车股份有限公司 | Cold and warm box system for LNG fuel vehicle |
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