JP2010276320A - Precooling system of refrigerator truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a precooling system of a refrigerator truck capable of introducing a temperature in a cargo chamber of the refrigerator truck to a required value efficiently in a short time, requiring no time and energy needlessly consumed for precooling, and moreover, contributing to the correction of an environmental problem by preventing the exhausting of the exhaust gas of an engine of the refrigerator truck during the precooling of the refrigerator truck. <P>SOLUTION: An air inlet 14 and an air outlet 15 making the inside communicate with the outside of the cargo chamber 8 are arranged. At the other end of a duct 10 with its one end facing in a low temperature chamber 2 in a low temperature facility 1 such as a refrigerating-freezing storage, a connecting means connected to the air inlet of the refrigerator truck 7 is arranged, and a blast means for leading out air in the low temperature chamber via the duct 10 is arranged. The air inlet 14 and air outlet 15 of the refrigerator truck 7 are opened, and the other end of the duct 10 is connected to the air inlet, thereby supplying cold air in the low temperature chamber to the cargo chamber of the refrigerator truck 7, and discharging air in the cargo chamber to the outside from the air outlet. Thus, the precooling of the cargo chamber is performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a system for efficiently pre-cooling a cargo compartment of a cold-storage vehicle using cold heat of a low-temperature facility such as a freezer / refrigerated warehouse.

  Conventionally, in order to cool the cargo compartment of the cold insulated vehicle to a required temperature, the cooling means mounted on the cold insulated vehicle is operated, and the engine power of the cold insulated vehicle is normally used for the operation of the cooling means. Therefore, while pre-cooling, the fuel of the cold car is consumed easily, there is also a problem of air pollution due to exhaust gas, and the carbon dioxide emission which is most concerned about global warming countermeasures is large There is also an important problem.

  In addition, the cold truck during the pre-cooling cannot carry in / out the baggage and cannot carry out the transportation operation, resulting in a reduction in transportation efficiency.

  Various techniques have been proposed in the past for the purpose of efficiently maintaining the temperature in the cargo compartment of a cold car (for example, see Patent Documents 1 and 2). Not put into practical use.

  Some low-temperature facilities use vaporized cold generated when used as fuel, such as liquefied natural gas, as a cold heat source. In such low-temperature facilities, the low-temperature room of the low-temperature facility is sufficiently cooled. Even so, there is still the case where surplus cooling heat (waste heat) is generated, and a technique for effectively utilizing this surplus cooling heat is being sought.

JP 2007-263498 A Japanese Utility Model Publication No. 5-10970

  The present invention can efficiently bring the temperature in the cargo compartment of a cold insulated vehicle to a required value in a short time, and does not require wasted time and energy required for precooling of a conventional cold insulated vehicle. It is an object of the present invention to provide a pre-cooling system for a cold-insulated vehicle that can eliminate the exhaust gas of the cold-reserved vehicle engine and contribute to the correction of environmental problems.

  In order to achieve the above object, a pre-cooling system for a cold-storage vehicle according to the present invention is provided with an air inlet and an outlet that communicate with the inside and outside of the cargo compartment in a cargo compartment of the cold-storage vehicle so that it can be opened and closed. A connecting means for connecting to the air inlet of the cold car is provided at the other end of the duct having one end facing the low-temperature room in the low-temperature facility, and a blowing means for leading the air in the low-temperature room through the duct is provided. And opening the same air inlet and outlet of the cold car, connecting the other end of the duct to the air inlet, and supplying the cold air in the cold room to the cargo room of the cold car by the blowing means, Air is discharged from the air outlet to the outside, and the cargo compartment can be precooled.

  In addition, the air inlet and the outlet are provided in the rear door of the cargo compartment of the cold car, and the duct is configured to have heat insulation.

  The air outlet further includes an exhaust duct having one end connected to the air outlet. The exhaust duct is provided with the air blowing means, and the air in the low temperature room is introduced into the cargo room by sucking the air in the cargo room by driving the air blowing means. It is assumed that it is configured to.

  Further, the low temperature chamber includes a front chamber, and the free end portion of the duct in the front chamber is configured by a flexible duct, so that the cold storage vehicle adjacent to the outer opening of the front chamber is at the tip of the flexible duct. The duct is connected by the connecting means provided.

  Furthermore, the low-temperature facility is a facility that uses vaporized cold heat of liquefied natural gas, and is characterized in that the cargo room is cooled using excess cold heat of the low-temperature chamber.

  According to the present invention, even if a cold car that has not been pre-cooled arrives at a low-temperature facility, the cold car does not need to drive a vehicle engine for pre-cooling, and wasteful fuel consumption and exhaust gas are not required. Therefore, it is possible to supply a large amount of air having a sufficiently low temperature in the low-temperature room, and to cool the cargo compartment of the cold insulated vehicle in a short time.

  In addition, the amount of carbon dioxide discharged by the electric power and fuel consumed for pre-cooling the cold car can be significantly reduced as compared with the conventional case, which can contribute to the suppression of global warming.

  In addition, since the system of the present invention has a very simple configuration, it has a great practical advantage that it can be applied to existing low-temperature equipment and cold-storage vehicles at a low cost and in a short period of time.

The block diagram which shows an example of the pre-cooling system which concerns on this invention. The perspective view which shows an example of a structure of a cold storage vehicle. The graph which shows the measurement result of the cargo compartment temperature by the pre-cooling system which concerns on this invention. The block diagram which shows the other example of the pre-cooling system which concerns on this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the system according to the present invention will be described below in detail based on specific examples shown in the accompanying drawings.
The low temperature facility 1 includes a low temperature chamber 2 for storing or cooling / freezing a baggage at a low temperature, and a cargo handling chamber 3 as a front chamber, and an entrance 5 that is opened and closed by a door 4 between the low temperature chamber and the cargo handling chamber. It is divided by the partition 6 which has.

The cargo handling chamber 3 is provided with an opening 9 that communicates with the outside and allows access from the cargo handling chamber to the cargo chamber 8 of the cold truck 7 stopped at a predetermined position.
The opening 9 is provided with opening / closing means such as a shutter, a curtain that shields the cooler from the cargo compartment, a cushion for contacting the rear end of the cooler, and the like, which are not shown.

  By the way, the low-temperature facility 1 is configured to maintain the low-temperature chamber at a required temperature by cold heat supplied from a cold heat source such as a liquefied gas utilization facility such as liquefied natural gas (not shown). The cold heat source may be a general cold heat generating facility such as a refrigerator.

  Thus, in the system of the present invention, a duct 10 having one end facing the cold chamber 2 is provided, and this duct passes through the cargo handling chamber 3 and the other end faces the cargo compartment of the cold car 7. It is configured to be able to.

Specifically, a duct 10 facing the inside of the low temperature chamber 2 through the communication port of the partition wall 6 is arranged on the ceiling of the cargo handling chamber 3, and the other end of the duct is provided so as to face the opening 9 of the cargo handling chamber. There is a flexible duct 10a on the free end side of the duct 10 for easy connection to the cold truck, and a connecting means for detachably attaching the duct to the cold truck at the tip of the flexible duct 10a. 12 is provided.
The duct 10 includes a flexible duct 10a including a heat insulating material such as a heat insulating material and a material.

And the blower 11 is provided in the base end part of the said duct 10, ie, the edge part by the side of the low temperature chamber 2, and it has comprised so that the air in a low temperature chamber can be guide | induced to a duct.
In addition, a blower may be provided in the intermediate | middle part and free end part of a duct other than the base end part of a duct, and may be provided in the cold storage vehicle 7 side.

Further, the cold insulated vehicle 7 is provided with an air inlet 14 and an air outlet 15 in the rear door 13 of the luggage compartment 8, and the air inlet and the outlet can be opened and closed by doors 14a and 15a, respectively.
In addition, when providing the said air blower 11 in the cold storage vehicle side, you may make it provide in any of an air inlet_port | entrance and an exit.

  The air inlet 14 is configured such that the free end portion of the duct 10 can be detachably connected by an appropriate connecting means 12, and the air flow in the duct is opened and closed at the base end portion of the duct. The damper 16 is provided, and this damper is normally closed (when the cool air is not sent).

Next, a specific operation of the system of the present invention configured as described above will be described.
When the cold storage vehicle 7 that has not cooled the interior of the luggage compartment 8 arrives at the low temperature facility 1, the doors 14a and 15a of the air inlet 14 and the air outlet 15 of the cold storage vehicle are opened, and the connecting means 12 at the tip of the duct 10 is connected. Through which the duct is connected to the air inlet 14.

  Then, the damper 16 is opened to drive the blower 11, and the air in the low temperature chamber 2 (low temperature air) is supplied into the luggage compartment 8 of the cold car 7 through the duct 10, and the air in the cargo compartment is the air. The product is discharged from the outlet 15 to the outside, and the cargo compartment is cooled to a required temperature.

  Thus, even if a cold car that has not been pre-cooled arrives at a low-temperature facility, the cold car does not need to drive the engine for pre-cooling, and there is concern about wasteful fuel consumption and air pollution caused by exhaust gas. In addition, a large amount of air having a sufficiently low temperature in the low-temperature chamber can be supplied, and the cargo compartment of the cold storage vehicle can be reliably cooled in a short time.

  By using the system of the present invention configured as described above, cooling air of −30 ° C. is supplied from the low temperature equipment 1 into the cargo compartment 8, and the air temperature at the center of the floor in the cargo compartment and the front panel constituting the cargo compartment When the change in the temperature of each aluminum material part of the floor center floor and the floor rear end floor was measured, a graph of the temperature change as shown in FIG. 3 was obtained.

  According to the results shown in the graph, the air temperature in the center of the floor becomes low temperature in a short time due to the cooling air blown out of the duct, and the temperature of the members constituting the cargo compartment smoothly changes with this temperature change. It turns out that it has fallen.

Moreover, the result of trial calculation of the carbon dioxide emission amount by the system of a present Example is demonstrated compared with the conventional pre-cooling method.
In the trial calculation, one fan having a rated output of 0.45 kW / hour was used as the blower 11 of the present embodiment.

  According to the system of the present embodiment, the default value of the carbon dioxide emission coefficient specified in the ministerial ordinance (Ministry of Economy, Trade and Industry Ordinance No. 3 of 2006) on the calculation of greenhouse gas emissions associated with the business activities of specific emitters The calculation of carbon dioxide emissions based on (0.555kg-CO2 / kWh) is as follows.

Effective power consumption per hour 0.40 × 0.8 = 0.32kW
CO2 emissions per hour 0.32 x 0.555 = about 0.18 kg / h
Annual CO2 emissions when 365 hours of pre-cooling is performed for 2 hours / day 0.18 x 2 hours x 365 days = about 131 kg / year / unit

  For example, the Kyushu Electric Power CO2 emission factor (0.387kg−CO2 / A similar calculation based on kWh) shows that the annual CO2 emissions are about 88kg / year / unit, and the actual carbon dioxide emissions can be further reduced.

  For comparison, when pre-cooling is performed by driving the vehicle engine of a cold car, the fuel consumption when the engine is idling at 7500 cc and the engine idling at 900 rpm is 22.5 cc / min. If the load associated with the operation of the refrigerator installed in the car is increased by 20%, the carbon dioxide emissions are estimated as follows.

Fuel consumption per hour (refrigerator stopped) 22.5cc x 60 minutes = 1,350cc / h
Fuel consumption per hour (chiller driven) 1.35 liters x 120% = 1.62 liters CO2 emissions per hour 1.62 liters x 2.62 = approx. 4.24 kg / h
Annual CO2 emissions when 365 hours of pre-cooling is performed for 2 hours / day 4.24 x 2 hours x 365 days = approx. 3,095 kg / year / unit

  For further comparison, a stand-by power supply for pre-cooling a cold car is provided in a low-temperature facility, and when the cold car is pre-cooled with electric power from the standby power supply, the refrigerator of the cold car is rated at 2.2 kW / hour. When two units are used, the CO2 emission factor is approximately 1,606 kg / year / unit when calculated with the default value, and the CO2 emission factor of Kyushu Electric Power is approximately 1,117 kg / year / unit.

  That is, according to the system of the present embodiment, compared with the case where the vehicle engine of the cold car is driven to perform precooling or the case where precooling is performed using a standby power source, the amount of carbon dioxide emission is not comparable. Can be understood very easily.

Next, another embodiment of the system according to the present invention will be described with reference to FIG.
In this embodiment, the exhaust duct 18 can be connected to the air outlet 15 provided in the luggage compartment 8 of the cold car 7 by the connecting means 17, and a blower 19 is provided at the tip of the exhaust duct. It is.

  Then, when pre-cooling the cold car, the duct 10 and the exhaust duct 18 are connected to the air inlet 14 and the outlet 15 of the cargo compartment 8, respectively, and the blower 19 is driven after the damper 16 is opened.

Thus, the air in the cargo compartment 8 is sucked by the blower 19 and led out to the outside (the cargo handling chamber 3), so that the air in the cargo compartment is replaced with the low-temperature indoor air more efficiently.
In this embodiment, the blower 11 on the low temperature chamber side is not provided, but a blower may also be provided on the low temperature chamber side as in the embodiment shown in FIG. May be provided. Further, in the present embodiment, the damper 16 is provided at the free end portion of the duct. However, the damper may be provided at the base end portion of the duct as in the embodiment of FIG. 1, or in the middle of the duct. Sometimes it is provided.

DESCRIPTION OF SYMBOLS 1 Low temperature equipment 2 Low greenhouse 3 Handling room 4 Door 5 Entrance / entrance 6 Bulkhead 7 Cold storage vehicle 8 Cargo compartment 9 Opening 10 Duct 10a Flexible duct 11 Blower 12 Connection means 13 Rear door 14 Air inlet 15 Air outlet 16 Damper 17 Connection means 18 Exhaust Duct 19 Blower

Claims (6)

An air inlet and outlet that communicate with the inside and outside of the cargo compartment are provided in the cargo compartment of the cold truck, and the other end of the duct that faces one end of the cold room in a low-temperature facility such as a freezer / refrigerated warehouse is connected to the cold truck. Providing a connecting means for connecting to the air inlet, and providing a blowing means for leading the air in the low temperature room through the duct;
The air inlet and outlet of the cold car are opened, the other end of the duct is connected to the air inlet, and the air in the cold room is supplied to the cargo room of the cold car by the air blowing means. Is cooled to the outside through the air outlet, and the cargo compartment is pre-cooled.   The pre-cooling system for a cold car according to claim 1, wherein the air inlet and the same outlet are provided in a rear door of a luggage compartment of the cold car. The pre-cooling system for a cold insulated vehicle according to claim 1, wherein the duct is configured to have heat insulation.   An exhaust duct having one end connected to the air outlet is provided. The exhaust duct is provided with the air blowing means, and the air in the low temperature room is introduced into the cargo room by sucking the air in the cargo room by driving the air blowing means. The pre-cooling system for a cold insulated vehicle according to claim 1 or 2, wherein the system is configured as described above.   The low-temperature chamber includes a front chamber, and the free end portion of the duct in the front chamber is configured by a flexible duct, and is provided at the front end of the flexible duct with respect to the cold truck that is adjacent to the outer opening of the front chamber. 4. A pre-cooling system for a cold insulated vehicle according to claim 1, wherein the duct is connected by the connecting means. The cold storage vehicle according to any one of claims 1 to 5, wherein the low-temperature facility is a facility that uses vaporized cold heat of liquefied natural gas, and cools the cargo compartment using surplus cold heat of the low-temperature chamber. Pre-cooling system.

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