KR20110004957A - Rapid freezing apparatus and metod for a movable freezer - Google Patents

Rapid freezing apparatus and metod for a movable freezer Download PDF

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Publication number
KR20110004957A
KR20110004957A KR1020090062402A KR20090062402A KR20110004957A KR 20110004957 A KR20110004957 A KR 20110004957A KR 1020090062402 A KR1020090062402 A KR 1020090062402A KR 20090062402 A KR20090062402 A KR 20090062402A KR 20110004957 A KR20110004957 A KR 20110004957A
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KR
South Korea
Prior art keywords
freezer
liquid nitrogen
temperature
freezing
oxygen concentration
Prior art date
Application number
KR1020090062402A
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Korean (ko)
Inventor
김호근
Original Assignee
주식회사 두성
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Priority to KR1020090062402A priority Critical patent/KR20110004957A/en
Publication of KR20110004957A publication Critical patent/KR20110004957A/en

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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
    • 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
    • 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
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/003—Transport containers
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/04—Self-contained movable devices, e.g. domestic refrigerators specially adapted for storing deep-frozen articles
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/30—Quick freezing
    • 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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Transportation (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The present invention relates to a rapid freezing apparatus and a cooling method of a mobile refrigeration plant for rapid cooling by injecting liquid nitrogen into the freezer of a mobile refrigeration plant such as a freezer truck or a freezing container. The present invention provides a liquid nitrogen supply unit provided with a liquid nitrogen container inside the freezer of the mobile refrigeration facility; An injection unit having a plurality of nozzles connected to a pipe having a solenoid automatic valve in the liquid nitrogen container, the nozzles being disposed in a freezer; And a control unit having a switch configured to lower the temperature by injecting liquid nitrogen into the freezer by remotely operating the solenoid automatic valve on and off, and injecting liquid nitrogen into the freezer prior to the operation of the freezing device. After the temperature is lowered, the refrigeration unit is operated.

According to the present invention, it is possible to rapidly freeze the freezer by using the endothermic effect that occurs during the vaporization of liquid nitrogen, thereby preventing excessive use of the freezing device provided in the mobile refrigeration system. Therefore, an excellent effect can be obtained to prevent the loss of oil required for the operation of the refrigeration unit, the loss of freezing time due to the delay of freezing time, and the deterioration of freshness of frozen food.

Freezer, Refrigerated Container, Freezer, Liquid Nitrogen, Rapid Freezer

Description

Rapid freezing device and cooling method of mobile refrigeration equipment {RAPID FREEZING APPARATUS AND METOD FOR A MOVABLE FREEZER}

The present invention relates to an apparatus and a method for rapidly freezing an interior in a mobile refrigeration plant, such as a refrigeration truck or a freezing container, and more particularly, to the liquid nitrogen in the freezer before operating the refrigeration apparatus provided in the mobile refrigeration plant. Rapid freezer to the desired temperature by spraying, and then by operating the refrigeration unit equipped in the mobile refrigeration equipment, rapid freezing device and cooling method of the mobile refrigeration equipment improved to prevent the loss of oil, loss of freezing time and deterioration of fresh food It is about.

In general, in the transportation of food products including frozen meat, frozen foods are freshly transported using a mobile refrigeration system such as a frozen vehicle (also called a 'top truck') or a frozen container.

Under the current law, storage, transportation, and supply are made under the condition of -18 ℃ or less. To meet these conditions, a freezer is installed in a mobile refrigeration system, and it is dropped from -18 ℃ or below by using a freezer. Frozen food is being shipped.

1A and 1B show an example of a mobile refrigeration plant 1 according to the prior art.

That is, the conventional mobile refrigeration installation (1) is provided with a freezer (10) for storing the frozen cargo to the rear of the driver's seat (5), such a freezer (10) is provided with a freezing device 20, such a freezing device The compressor 20 is equipped with a compressor 30 in the engine 22 of the mobile refrigerating plant 1, and a condenser 35 connected to the compressor 30 through a pipeline is installed outside the freezer 10. The first evaporator 50a and the second evaporator 50b having expansion valves 40a and 40b respectively connected to the condenser 35 are connected to the freezer 10.

In addition, the driver's seat 5 has a temperature display window 62 in which the temperature detected from the temperature sensor 60 provided inside the freezer 10 is displayed to the outside, and the freezing device 20 is turned on and off. The control panel 70 is provided with a switch 72 to make it.

Therefore, in the conventional mobile refrigeration installation (1) by operating the switch 72 of the control panel panel (On), the compressor 30 is driven by the drive shaft 24 of the engine 22, As the compressor 30 is driven, the refrigerant passes through each of the expansion valves 40a and 40b past the condenser 35 and flows into the first evaporator 50a and the second evaporator 50b. A freezing effect is achieved in the freezer 10 by the evaporators 50a and 50b.

In addition, the refrigerant passing through the evaporators 50a and 50b flows back into the compressor 30 and is circulated to the condenser 35 to form a refrigeration cycle through continuous circulation of the refrigerant and to perform a freezing operation.

However, it takes about 1 hour-2 hours to reduce the temperature in the freezer 10 to -18 ° C from the room temperature by using such a conventional freezer (20). Therefore, there is a problem that can not ensure the maintenance of freshness of the actual frozen food during the time falling to less than 18 ℃.

In addition, when transporting frozen foods for mobile refrigeration equipment (1), after shipment from the warehouse, they are usually transported to 5-10 supply sources, and when delivered to suppliers, the freezer (10) is opened. Delivery service is in progress.

In this process, the temperature of the freezer 10 rises close to room temperature, and afterwards, the freezer device 20 must be operated for about 1-2 hours for delivery elsewhere to reach -18 ° C. Accordingly, the temperature of the freezer 10 rises and falls 5 times a day for a long time, and as a result, oil loss, time loss, and freezing for 1-2 hours due to excessive operation of the freezer 20 are repeated. Problems such as a decrease in the freshness of the food will occur, it was urgent in the art to develop a technology that can improve such problems.

The present invention is to solve the conventional problems as described above, the purpose is to rapidly freeze the freezer in a mobile refrigeration equipment such as a refrigeration vehicle or a freezing container, and after reaching the desired freezing temperature, the existing freezing apparatus It is possible to maintain the freezing temperature by using the rapid freezing device of the mobile refrigeration equipment improved to prevent the loss of oil caused by excessive use of the refrigeration device, the loss of freezing time due to the delay of freezing time and the deterioration of fresh food And a cooling method.

And another object of the present invention can be used in parallel with the refrigeration apparatus provided in the mobile refrigeration equipment, such as a conventional refrigeration vehicle or a refrigerated container without structural improvement can be easily mounted and utilized in the existing shipped refrigeration vehicle or refrigerated container. It is to provide a rapid freezing apparatus and a cooling method of a mobile refrigeration plant for improved.

In order to achieve the above object, a rapid freezing device for a mobile refrigeration plant according to the present invention, in the apparatus for freezing the inside of the freezer containing a frozen cargo in a mobile refrigeration plant including a refrigeration vehicle or a freezing container, the freezing device Liquid nitrogen supply unit provided with a liquid nitrogen container inside the freezer of the mobile refrigeration equipment equipped with; An injection unit having a plurality of nozzles connected to a pipe having a solenoid automatic valve in the liquid nitrogen container, the nozzles being disposed in a freezer; And a control unit having a switch configured to lower the temperature by injecting liquid nitrogen into the freezer by remotely operating the solenoid automatic valve on and off, and injecting liquid nitrogen into the freezer prior to the operation of the freezing device. After the temperature is lowered, the refrigerating device is operated. Therefore, the present invention can rapidly freeze the freezer in a mobile refrigeration system, it is possible to prevent the loss of oil due to excessive use of the freezing device, the loss of freezing time due to the delay of freezing time and the freshness of frozen food.

In addition, the present invention preferably further comprises an exhaust fan installed in the freezer, an oxygen concentration sensor for detecting the oxygen concentration inside the freezer, and a switch for turning on and off the exhaust fan to the controller to further include a temperature of the freezer. When the temperature falls below the set temperature value, or when the oxygen concentration in the freezer is lower than the set temperature, the exhaust fan is operated to discharge the nitrogen gas inside the freezer to the outside. As described above, the present invention can recover the oxygen concentration by discharging nitrogen gas in the freezer to the outside and introducing external air.

And the present invention preferably the oxygen concentration sensor is provided with a control unit, the oxygen concentration display window for displaying the oxygen concentration inside the freezer on the outer surface of the door of the freezer, the driver can determine the oxygen concentration in the freezer, the operator of the door of the freezer When opened, it is configured to check the oxygen concentration and enter and exit. Therefore, the present invention can prevent in advance a safety accident such as choking the worker due to nitrogen gas in the freezer.

In addition, the present invention preferably the liquid nitrogen supply unit by spraying the liquid nitrogen in the freezer through the injection unit to reach a temperature of -18 ° C through the switch operation, and stops the liquid nitrogen injection when reaching -18 ° C It provides a rapid freezing device for a mobile refrigeration plant characterized in that the feature. As described above, the present invention lowers the temperature of the freezer to the set temperature or lower through the injection of liquid nitrogen, and then maintains the low temperature of the freezer by operating the existing freezer.

In order to achieve the above object, a rapid freezing method of a mobile refrigeration installation according to the present invention, in a method for freezing the inside of a freezer containing a freezer in a mobile refrigeration installation including a refrigeration vehicle or a freezing container, a freezing device And a liquid nitrogen supply unit provided with a liquid nitrogen container inside the freezer of the mobile refrigerating unit equipped with a plurality of nozzles, and a plurality of nozzles connected to a pipe having a solenoid automatic valve in the liquid nitrogen container, wherein the nozzles are disposed in a freezer. Installing a rapid freezing device including a spraying unit and a control unit having a switch configured to lower the temperature by spraying liquid nitrogen into a freezer by remotely operating the solenoid automatic valve on and off; Spraying liquid nitrogen into the freezer through a rapid freezing device prior to operation of the freezing device of the mobile refrigeration system to lower the freezer temperature to below a set temperature; And maintaining the freezer at a low temperature by operating the freezer of the mobile freezer when the freezer temperature falls below a set temperature. Therefore, the present invention can freeze the freezer by spraying the liquid refrigerant prior to the operation of the freezing device of the mobile refrigeration equipment, the loss of oil caused by excessive use of the freezer, loss of freezing time due to the delay of freezing time and freshness of frozen food Deterioration etc. can be prevented.

And preferably, the step of installing the rapid freezing device in the freezer of the mobile refrigeration equipment for installing the exhaust fan and the oxygen concentration sensor in the freezer, the control unit further comprises the installation of a switch for turning on and off the exhaust fan. When the temperature of the freezer drops below the set temperature value of -18 ° C, or when the oxygen concentration in the freezer drops below the set temperature, the exhaust fan is operated to discharge nitrogen gas inside the freezer to the outside. It is to restore the concentration. As described above, the present invention restores the oxygen concentration in the freezer to prevent a safety accident such as choking of an operator in advance due to nitrogen gas in the freezer.

According to the present invention, the liquid nitrogen is injected into the freezer before operating the existing freezing device in a mobile refrigeration facility such as a refrigeration vehicle or a freezing container. Therefore, the freezer can be rapidly frozen by using the endothermic effect of the vaporization of liquid nitrogen, and when the temperature of the freezer is lowered below the set temperature, the existing freezer is operated to maintain the low temperature of the freezer.

Therefore, it is possible to prevent excessive use of the refrigerating device provided in the mobile refrigeration equipment, thereby improving the oil loss required for the operation of the refrigerating device, the freezing time due to the delay of the freezing time, and the improved effect of preventing the freshness of the frozen food. Obtained.

And according to the present invention by having a structure for spraying the liquid nitrogen in the freezer of the mobile refrigeration plant can be used in parallel with the existing refrigeration apparatus without structural improvement. Therefore, it can be easily mounted and utilized in a conventionally shipped refrigeration vehicle or a refrigerated container, thereby having an excellent effect of widening its application range.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

The rapid freezing device 100 of the mobile refrigeration plant according to the present invention is for rapidly freezing the inside of the freezer (10) containing the frozen cargo in the mobile refrigeration plant (1) including a refrigeration vehicle or a refrigerated container, the conventional mobile It is a device for auxiliary liquid nitrogen injection for rapid freezing while maintaining the freezing device 20 applied to the freezing facility (1).

As shown in FIG. 2, the rapid freezing device 100 of the mobile refrigeration system according to the present invention has a liquid nitrogen container 122 inside the freezer 10 of the mobile refrigeration system 1 equipped with the freezing device 20. It has a liquid nitrogen supply unit 120 having a. The liquid nitrogen container 122 is a container containing liquid nitrogen maintained at −196 ° C. inside, and is a cryogenic high pressure container specially manufactured through a double wall structure in which a vacuum is formed therein.

And the liquid nitrogen container 122 is connected to the injection unit 140, the injection unit 140 is provided with a plurality of nozzles 146 connected to the pipe 144 having a solenoid automatic valve 142. In addition, a plurality of the nozzles 146 are disposed in the freezer 10.

The injection unit 140 is made of a material capable of transferring and opening and closing the liquid nitrogen at which the solenoid automatic valve 142 and the pipe 144 are maintained at -196 ° C. The solenoid automatic valve 142 is Through the operation of the switch 162 of the controller 160 to be described later is a structure that is automatically opened and closed.

In addition, the nozzle 146 is preferably fixed to a plurality of the upper side of the freezer 10, the mounting number can be mounted differently depending on the size of the freezer (10). That is, when the internal volume of the freezer 10 is large, a large amount is mounted, and when the volume of the freezer 10 is small, a relatively small amount of liquid nitrogen injected can be adjusted.

And the rapid freezing device 100 of the mobile refrigeration plant according to the present invention by remotely operating the solenoid automatic valve 142 on, off by spraying the liquid nitrogen in the freezer 10 to lower the temperature of the switch 162 The control unit 160 having a. As shown in FIG. 3, the control unit 160 is additionally installed in the existing control panel 70 for the refrigerating device 20 provided in the driver's seat 5.

In addition, the present invention is provided with an exhaust fan 170 on the upper surface of the freezer 10, an oxygen concentration sensor 180 for detecting the oxygen concentration inside the freezer 10, the exhaust fan 170 ), The switch 172 for turning on and off is installed in the control unit 160.

In such a structure, the oxygen concentration sensor 180 may be provided with an oxygen concentration display window 182 for displaying the oxygen concentration inside the freezer 10 on the control unit 160 and the outer surface of the door of the freezer 10.

Reference numeral 200 is a power supply of the mobile refrigeration plant (1).

In the rapid freezing apparatus 100 of the mobile refrigeration system according to the present invention configured as described above, as shown in Figure 4, the temperature of the freezer 10 is displayed as a number on the temperature display window 62 provided in the control unit 160. .

Therefore, if the temperature of the freezer 10 is maintained higher than the set temperature of, for example, -18 ℃, it is lowered below the set temperature, operating the freezer device 20 provided in the existing mobile refrigeration installation (1) Instead, the liquid nitrogen is first injected into the freezer 10 through the liquid nitrogen supply unit 120 and the injection unit 140.

That is, when the switch 162 provided in the controller 160 is turned on, the solenoid automatic valve 142 electrically connected to the power supply device 200 is opened and the freezer is opened through the nozzles 146. Liquid nitrogen is injected into the interior of (10).

As such liquid nitrogen vaporizes from the liquid phase into a gaseous state, the internal heat of the freezer 10 is absorbed to rapidly lower the temperature of the freezer 10 to reach -18 ° C. In general, the time required to drop the temperature of the freezer 10 to -18 ° C or less by spraying liquid nitrogen is about 10-15 seconds, which is very fast compared to the conventional freezer 20 that takes 1-2 hours. will be.

As described above, after the temperature in the freezer 10 is rapidly dropped to −18 ° C. by using the rapid freezing device 100 of the present invention, the injection of the liquid nitrogen is blocked by turning off the switch 162. By operating the existing refrigeration unit 20, this temperature is maintained.

In this case, since the internal temperature of the freezer 10 is displayed in real time through the temperature display window 62 of the control panel 70 provided in the driver's seat 5 through the temperature sensor 60, the driver may watch the temperature of the freezer 10. It is possible to operate the rapid freezing device 100 and the existing freezing device 20 of the present invention.

When the oxygen concentration is low in the freezer 10 to restore the oxygen concentration, the exhaust fan 170 is operated by operating the switch 172 to discharge the nitrogen gas inside the freezer 10 to the outside. You can do it.

Hereinafter, the rapid freezing method 300 of the mobile refrigeration plant according to the present invention will be described in more detail step by step with reference to FIG.

The rapid freezing method 300 of the mobile refrigeration system according to the present invention is a liquid nitrogen supply unit having a liquid nitrogen container 122 inside the freezer 10 of the mobile refrigeration system 1 equipped with a freezing device 20 ( 120 and a plurality of nozzles 146 connected to a pipe 144 having a solenoid automatic valve 142 in the liquid nitrogen container 122, wherein the nozzles 146 are disposed in the freezer 10. A control unit 160 having a predetermined injection unit 140 and a switch 162 configured to lower the temperature by injecting liquid nitrogen into the freezer 10 by remotely operating the solenoid automatic valve 142 on and off. Step (S10) is made to install the rapid freezing apparatus 100 to the freezer 10 of the mobile refrigeration plant (1).

Then, the liquid nitrogen is injected into the freezer 10 through the rapid freezing device 100 to lower the temperature of the freezer 10 below a set temperature (S20), and such a step (S20) is performed. Prior to operation of the freezing device 20 of the mobile refrigeration plant (1).

At this time, the control panel 70 provided in the driver's seat 5 is sprayed with liquid nitrogen in the freezer 10 while watching the temperature of the temperature display window 62 displayed through the temperature sensor 60 installed inside the freezer 10, Quickly lower the temperature of the freezer 10 to a set temperature of -18 ℃.

When the temperature of the freezer 10 falls below the set temperature as described above, the liquid nitrogen injection of the rapid freezing device 100 is stopped, and the freezing device 10 of the mobile freezing facility 1 is operated to operate the freezer 10. ) Is kept at a low temperature (S30).

The rapid freezing method 300 of the mobile refrigeration plant according to the present invention as described above, the exhaust fan to the freezer 10 in the step (S10) of installing the rapid freezer 100 in the freezer 10 of the mobile refrigeration plant (1). The installation unit 170 and the oxygen concentration sensor 180 are further included, and the control unit 160 further includes installing a switch 162 for turning on and off the exhaust fan 170.

Such an exhaust fan 170 is the exhaust fan 170 when the temperature of the freezer 10 falls below a set temperature value of −18 ° C., or when the oxygen concentration in the freezer 10 falls below a set temperature. By operating the nitrogen gas in the freezer 10 to the outside to recover the oxygen concentration.

When the liquid nitrogen vaporizes inside the freezer 10 as described above, the oxygen concentration in the freezer 10 is lean. In this case, the oxygen concentration is low, and there is a danger of choking of the worker entering and leaving the freezer 10. That is, when the nitrogen gas is present in a large amount in an enclosed area due to its characteristics, when an operator enters the freezer 10 for unloading, it may cause asphyxiation, thereby installing an exhaust fan 170 on the top of the freezer 10. By operating it, nitrogen gas is discharged out and oxygen concentration is restored.

When the oxygen concentration is restored in this way, when the temperature of the freezer 10 falls below a set temperature value of −18 ° C. or when the oxygen concentration in the freezer 10 falls below a set temperature, an operator's safety accident may be concerned. In this case, by operating the switch 162 provided in the control unit 160 to operate the exhaust fan 170, the nitrogen gas in the freezer 10 is discharged to the outside. When the nitrogen gas is discharged, air is introduced from the outside of the freezer 10 to naturally restore the oxygen concentration inside the freezer 10.

On the other hand, the oxygen concentration sensor 180 for detecting the oxygen concentration inside the freezer 10 is preferably provided with an oxygen concentration display window 182 on the outer surface of the control unit 160 and the door of the freezer (10). This is because the control unit 160 is built in the control panel 70 of the driver's seat 5, the driver can operate the exhaust fan 170 through the operation of the switch 172, if necessary to restore the oxygen concentration.

And when the operator opens the door of the freezer 10, the oxygen concentration display window 182 mounted on the outer surface of the door of the freezer 10 can check the oxygen concentration and enter and exit the inside of the freezer 10, such as choking safety. Accidents can be prevented in advance.

As described above, the present invention injects liquid nitrogen into the freezer 10 before operating the existing freezing device 20 in a mobile refrigeration facility 1 such as a refrigerator vehicle or a freezing container.

Therefore, in the freezer 10, the endothermic effect occurring during the vaporization of liquid nitrogen can be obtained, and the freezer 10 can be rapidly frozen for 10-15 seconds using the same, and the temperature of the freezer 10 is lower than the set temperature. When lowered to maintain the low temperature state of the freezer (10) by operating the existing refrigeration device (20).

As described above, the present invention does not need to operate the conventional refrigeration apparatus 20 for 1-2 hours, thereby preventing excessive use of the refrigeration apparatus 20, so that oil loss required for operation of the conventional refrigeration apparatus 20 can be prevented. Loss of freezing time and deterioration of freshness of frozen food due to delay of freezing time can be completely prevented.

In addition, the present invention can be used in parallel with the existing refrigeration apparatus 20 without structural improvement can be easily mounted and utilized in a conventionally shipped refrigeration vehicle or a refrigerated container, and thus the application range is very wide.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such a specific structure. Those skilled in the art will be able to variously modify or change the embodiments of the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Nevertheless, it will be apparent that all such modifications or design modifications to such simple embodiments will clearly fall within the scope of the present invention.

Figure 1a is a block diagram showing a refrigerating device provided in the mobile refrigeration facility according to the prior art.

Figure 1b is a block diagram showing a refrigeration apparatus provided in a mobile refrigeration facility according to the prior art as a block.

2 is a block diagram illustrating a structure in which a rapid freezing apparatus according to the present invention is mounted together with an existing freezing apparatus of a mobile refrigeration system.

Figure 3 is a block diagram showing a rapid freezing apparatus according to the present invention with an existing refrigeration apparatus of a mobile refrigeration plant.

4 is a structural diagram showing the entire quick freezing apparatus according to the present invention.

5 is a process flowchart showing a step-by-step rapid freezing method of a mobile refrigeration plant according to the present invention.

Description of the Related Art

1 ..... Mobile Refrigeration Equipment 5 ..... Driver's Seat

10 ... Freezer 20 ... Freezer

22 .... engine 24 .... drive shaft

30 .... Compressor 35 .... Condenser

40a, 40b .... Expansion valves 50a, 50b .... Evaporator

60 ... temperature sensor 62 ... temperature display

70 .... control panel 72 .... switch

100 ... Rapid freezing device for mobile refrigeration equipment

120. Liquid nitrogen supply 122 .... Liquid nitrogen container

140 ... Injector 142 ... Solenoid valve

144 ... Plumbing 146 .... Nozzle

160 ... control unit 162,172 .... switch

170.Exhaust fan 180 .... Oxygen concentration sensor

182 ... Oxygen level display 200 .... Power supply

300 ... Rapid Freezing Method of Mobile Refrigeration Equipment

S10 ... step of installing the quick freezer in the freezer

S20 ... lowering the temperature by spraying liquid nitrogen into the freezer

S30 ... step of keeping the freezer at a low temperature with a freezer of a mobile freezer

Claims (6)

In the apparatus for freezing the inside of the freezer (10) containing the frozen cargo in a mobile refrigeration plant (1) including a refrigeration vehicle or a freezing container, A liquid nitrogen supply unit (120) provided with a liquid nitrogen container (122) inside the freezer (10) of the mobile refrigeration system (1) equipped with a freezing device (20); The liquid nitrogen container 122 includes a plurality of nozzles 146 connected to a pipe 144 having a solenoid automatic valve 142, and the nozzles 146 are disposed in the freezer 10. 140); And And a control unit (160) having a switch (162) for lowering the temperature by spraying liquid nitrogen in the freezer (10) by remotely operating the solenoid automatic valve (142) on and off. After the operation of the liquid nitrogen to the freezer (10) inside the freezer (10) to lower the temperature of the freezer (10), and then to operate the freezing device 20, the rapid freezer 100 of the mobile refrigeration installation for mobile . The method of claim 1, wherein the freezer (10) has an exhaust fan (170) installed, the oxygen concentration sensor 180 for detecting the oxygen concentration inside the freezer (10), and the exhaust fan 170 on, off When the temperature of the freezer (10) falls below the set temperature value, or when the oxygen concentration in the freezer (10) falls below the set temperature by including a switch 172 to the control unit 160 to exhaust the exhaust A rapid freezing device (100) of a mobile refrigeration installation for mobile, characterized in that configured to discharge the nitrogen gas inside the freezer (10) to the outside by operating the fan (170). The oxygen concentration sensor 180 of claim 2, wherein the oxygen concentration sensor 180 includes a controller 160 and an oxygen concentration display window 182 that displays oxygen concentration inside the freezer 10 on the outer surface of the door of the freezer 10. Oxygen concentration in the freezer (1) can be grasped, and when the operator opens the door of the freezer (10), the rapid freezing apparatus (100) of the mobile refrigeration system, characterized in that configured to check the oxygen concentration and to enter. The liquid nitrogen supply unit 120 of claim 1, wherein the liquid nitrogen supply unit 120 controls the liquid nitrogen of the freezer 10 through the injection unit 140 such that the temperature inside the freezer 10 reaches -18 ° C through the operation of the switch 162. Injecting the inside, and a rapid freezer 100 of a mobile refrigeration installation characterized in that to stop the injection of liquid nitrogen when it reaches -18 ℃. In the method for freezing the inside of the freezer (10) containing the frozen cargo in a mobile refrigeration plant (1) comprising a refrigeration vehicle or a freezing container, A liquid nitrogen supply unit 120 provided with a liquid nitrogen container 122 in the freezer 10 of the mobile refrigeration system 1 equipped with a freezing device 20, and a solenoid automatic valve in the liquid nitrogen container 122. A plurality of nozzles 146 connected to a pipe 144 having 142, the nozzles 146 being disposed in the freezer 10, and the solenoid automatic valve ( Installing a rapid freezing device 100 including a control unit 160 having a switch 162 to lower the temperature by spraying liquid nitrogen in the freezer 10 by remotely operating the on-off 142 (S10) ); Before the operation of the freezing device 20 of the mobile refrigeration system 1 by spraying liquid nitrogen into the freezer 10 through the rapid freezing device 100 to lower the freezer 10 temperature below the set temperature (S20) ; And When the temperature of the freezer (10) is lower than the set temperature, operating the freezer (20) of the mobile refrigeration plant (1) to maintain the freezer (10) at a low temperature (S30); Rapid freezing method (300) of a mobile refrigeration plant to be. According to claim 5, The step of installing the rapid freezing device 100 in the freezer (10) of the mobile refrigeration plant (1) (S10) is the exhaust fan 170 and the oxygen concentration sensor 180 in the freezer (10) ), And the control unit 160 further includes a switch 172 for turning the exhaust fan 170 on and off, and the temperature of the freezer 10 falls below a set temperature value of −18 ° C. In this case, or when the oxygen concentration in the freezer 10 is lower than the set temperature, the exhaust fan 170 is operated to discharge the nitrogen gas inside the freezer 10 to the outside to recover the oxygen concentration. Rapid freezing method of a mobile refrigeration plant (300).
KR1020090062402A 2009-07-09 2009-07-09 Rapid freezing apparatus and metod for a movable freezer KR20110004957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090062402A KR20110004957A (en) 2009-07-09 2009-07-09 Rapid freezing apparatus and metod for a movable freezer

Applications Claiming Priority (1)

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KR1020090062402A KR20110004957A (en) 2009-07-09 2009-07-09 Rapid freezing apparatus and metod for a movable freezer

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101370291B1 (en) * 2012-11-07 2014-03-05 주식회사 에이포텍 Temperature control system of refrigerating equipment
KR101426475B1 (en) * 2012-12-13 2014-08-06 (주)동양화학 Freezer with hybrid type nitrogen spray system and the freezing auxiliary apparatus therefor
CN108870822A (en) * 2018-07-31 2018-11-23 湖北交投莱克现代农业科技有限公司 A kind of aquatic products liquid nitrogen quick freezer
CN110926048A (en) * 2019-12-02 2020-03-27 华晨专用车装备科技（大连）有限公司 Cage type compressed liquid gas refrigerant refrigerating system device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101370291B1 (en) * 2012-11-07 2014-03-05 주식회사 에이포텍 Temperature control system of refrigerating equipment
KR101426475B1 (en) * 2012-12-13 2014-08-06 (주)동양화학 Freezer with hybrid type nitrogen spray system and the freezing auxiliary apparatus therefor
CN108870822A (en) * 2018-07-31 2018-11-23 湖北交投莱克现代农业科技有限公司 A kind of aquatic products liquid nitrogen quick freezer
CN110926048A (en) * 2019-12-02 2020-03-27 华晨专用车装备科技（大连）有限公司 Cage type compressed liquid gas refrigerant refrigerating system device

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