JP2000186880A - Cool-keeping storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight of a cool-keeping storage and raise the transportation efficiency, by naturally circulating in-storage chill or circulating in-storage chill only under in-storage temperature condition. SOLUTION: In a cool-keeping storage which is equipped with a heat insulating structure of cool-keeping storage body 1, a door 2 for opening and closing the opening 4 of the cool-keeping storage body 1, a cold accumulator 20 for cooling the inside of the cool-keeping storage body 1, and a refrigeration machine 19 including an evaporator 23 for cooling the cold accumulator 20, the cold accumulator 20 and the evaporator 23 are arranged in the upper part of the cool-keeping room 5 within the cool-keeping storage body 1 so that the inside of the cool-keeping room 5 may be cooled by the natural circulation of the chill from the cold accumulator 20 arranged in the upper part of the cool-keeping room 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool box which is transported by being loaded on a truck or the like.

[0002]

2. Description of the Related Art Generally, a cold storage loaded on a truck or the like and transported includes, for example, a regenerator for cooling a refrigerating room in a refrigerating cooler, and a refrigerating device for cooling the regenerator.
The refrigeration system is operated only in the storage warehouse of the delivery terminal, and does not operate the refrigeration system during transportation.
The object to be cooled stored in the cool storage is to be kept cool by the cold stored in the cool storage device.

Normally, in this kind of cold storage, a regenerator is arranged at the bottom of the cold storage room, and the cool air in the refrigerator is forcedly circulated by a fan in the refrigerator.

[0004]

By the way, in the case of this type of cool box, it is necessary to reduce the weight of the cool box itself in order to reduce the transportation cost. However, when the internal cool air is forcedly circulated by the internal fan as described above, a relatively large internal fan and a power supply (that is, a battery) for driving the internal fan are required.
Then, there is a problem that the cool box becomes heavier by the weight (normally, about 20 kg) of these devices, and the load weight is limited.

[0005] The present invention has been made in view of the above points, and is configured to circulate cold air in a refrigerator naturally or to circulate cool air in a refrigerator only under a predetermined temperature condition in a refrigerator. An object of the present invention is to reduce the weight and thereby improve the transportation efficiency.

[0006]

According to the first aspect of the present invention, as a means for solving the above-mentioned problems, a cold storage main body 1 having a heat insulating structure and a door 2 for opening and closing an opening 4 of the cold storage main body 1 are provided.
And a refrigerating unit 19 including a regenerator 20 for cooling the interior of the refrigerating box main body 1 and a refrigerating device 19 including an evaporator 23 for cooling the regenerator 20, wherein the regenerator 20 and the evaporator 23 are It is arranged above the cold storage room 5 in the cold storage main body 1.

With the above configuration, the inside of the cold storage room 5 is cooled by the natural circulation of cool air from the regenerator 20 provided above the cold storage room 5, and the internal fan and the cooling fan The drive power of the fan in the refrigerator (that is, battery)
Becomes unnecessary. Therefore, the weight of the in-compartment fan and the battery is reduced, and the loading weight of the cool box can be increased accordingly.

[0008] As in the invention of claim 2, claim 1
In the cold storage described above, when equipment other than the evaporator 23 constituting the refrigerating device 19 is disposed above the cold storage room 5 in the cold storage main body 1, the evaporator disposed in the cold storage room 5 23 and other devices arranged outside the cold storage room 5 are adjacent to each other, and the piping structure of the refrigerant piping in the refrigeration apparatus 19 can be simplified.

As in the invention of claim 3, claim 1
In the cool box according to any one of claims 2 and 3,
An internal fan 2 for circulating cool air through the cold storage room 5
In the case where the cooling chamber 9 is provided, it is possible to cope with the case where the temperature of the cold storage room 5 rises by forced cooling air circulation by operating the internal fan 29. In this case, since the internal fan 29 may be an auxiliary fan, the fan itself may be small, and the battery 30 as a driving power source may be small, and the weight of the cool box can be reduced. .

As in the invention of claim 4, claim 3
In the cool box described in the above, the inside temperature detecting means 31 for detecting the temperature inside the cool room 5 and the inside fan when the inside temperature detected by the inside temperature detecting means 31 exceeds a set temperature. 29, a control unit 32 for operating the internal fan 2 only when the internal temperature exceeds a set temperature.
9 is operated, and the internal temperature can always be maintained at or below the set temperature.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

This cool box is loaded on a truck or the like and transported. As shown in FIGS. 1 and 2, a cool box body 1 having a heat insulating structure and an opening 4 of the cool box body 1 are provided. It is provided with a door 2 having a heat insulating structure that opens and closes, and a cooling means 3 for cooling the inside of the cold storage main body 1.

The cold storage main body 1 is in the shape of a vertically long rectangular parallelepiped box having an opening 4 on the front side for taking in and out of the object to be cooled, and a cooling room 5 for storing the object to be cooled and the cooling room. 5 and a lid cover 7 formed above the top plate 5a.
And a machine room 6 covered by the following. Reference numeral 8 denotes an air inlet for sucking air into the machine room 6, and 9 denotes a machine room 6.
An air outlet 10 for blowing air out of the apparatus is a caster for moving the cool box.

The outer walls (ie, the top plate 5a, the side plates 5b, 5b, the back plate 5c, and the bottom plate 5d) of the cool room 5 in the cool box body 1 are made of an inner plate 11 and an outer plate 12 made of synthetic resin.
Is filled with a heat insulating material 13. In addition,
The outer wall of the machine room 6 is formed of a single plate of synthetic resin.

The door 2 is provided with an inner plate 14 made of synthetic resin.
A heat insulating material 16 is filled between the outer plate 15 and the outer plate 15. Reference numeral 17 denotes a handle for opening and closing the door 2, and reference numeral 18 denotes a lock device for holding the door 2 in a closed state.

The refrigerating means 3 comprises a regenerator 20 for cooling the refrigerating chamber 5 and a refrigerating device 19 including an evaporator 23 for cooling the regenerator 20. The regenerator 20 is configured by storing a regenerator in a box-shaped case. As shown in FIGS. 3 and 4, a mounting bracket 25 is fixed to the refrigerating room top plate 5 a with screws 26. It is attached by.

The refrigerating device 19 includes a compressor 21 and a condenser 22 disposed in the machine room 6 and the refrigerating room 5.
And an evaporator 23 attached to the lower surface of the regenerator 20 at the upper part. Reference numeral 24 denotes an accumulator, 27 denotes a cooling fan for cooling the condenser 22, and 28 denotes a drain pan. The compressor 21, the condenser 22, the evaporator 23, and the accumulator 24 are sequentially connected by a refrigerant pipe (not shown). The refrigerant compressed by the compressor 21 is condensed and liquefied by the condenser 22, and is expanded by an expansion valve (not shown). After the pressure is reduced by the evaporator 23, the refrigerant is evaporated by the evaporator 23, and the regenerator stored in the regenerator 20 is cooled by the latent heat of evaporation at this time, thereby storing the cold. The operation of the refrigeration system 19 is performed only in the storage warehouse at the delivery terminal, and during transportation, the refrigeration system 19 is operated.
Is not performed, the object to be cooled stored in the cool storage is kept cool by the cold stored in the cool storage device 20.

On the front side of the regenerator 20, an internal fan 29 for circulating cool air in the internal storage is provided. The in-compartment fan 29 is driven by a battery 30 disposed in the machine room 6.

Further, a temperature sensor 31 is provided on the upper rear side of the cold storage room 5 (ie, on the suction side of the regenerator 20), which acts as an internal temperature detecting means for detecting the internal temperature T. I have.

As shown in FIG. 5, the operation of the in-compartment fan 29 is controlled by a control signal from a controller 32 which performs various arithmetic processing based on the temperature information T inputted from the temperature sensor 31. ing. That is, the controller 32 functions as a control unit that operates the internal fan 29 when the internal temperature T detected by the temperature sensor 31 exceeds the set temperature Ts.

The following effects can be obtained in the cool box constructed as described above.

The refrigerating device 19 is operated by using the power supply of the storage warehouse at the delivery terminal to cool the regenerator 20 to store the cold. During the transportation, the operation of the refrigerating device 19 is stopped, and the object to be cooled is kept cool by the cool heat of the regenerator 20. At this time, the cold storage in the cold storage room 5 is normally performed by the natural circulation of cool air from the cool storage unit 20.

By the way, in this kind of cold storage room, the state where the outside air temperature is 35 ° C. and the inside temperature T is −18 ° C. or less is 12 hours.
Although it is obligatory to keep the time, the temperature T in the refrigerator may exceed -18 ° C depending on the outside air temperature condition, the condition in the refrigerator, and the like only by the natural circulation of the cool air described above. Therefore,
In the present embodiment, the operation is controlled by controlling the operation of the internal fan 29 by the controller 32.

Next, the operation control of the internal fan will be described with reference to FIG.
This will be described in detail with reference to the flowchart of FIG.

In step S1, the temperature sensor 31
Is detected, the detected temperature T is compared with a set temperature Ts (for example, −18 ° C.) in step S2. If it is determined that T> Ts, the internal fan is determined in step S3. 29 is driven. Since the cool air from the regenerator 20 is forcibly circulated by the operation of the in-compartment fan 29, the temperature in the cool storage room 5 decreases. During operation of the in-compartment fan 29, the detected temperature T from the temperature sensor 31 is input in step S4.
5, a comparison is made between the detected temperature T and the set temperature Ts plus a value obtained by adding an additional temperature α (here, α <0) for preventing hunting (that is, Ts + α), where T <Ts
The operation of the in-compartment fan 29 is continued until it is determined to be + α. However, if it is determined that T <Ts + α, the operation of the in-compartment fan 29 is stopped in step S6, and thereafter, the process returns to step S1.

As described above, in the present embodiment, the internal fan 29 is operated only when the internal temperature T exceeds the set temperature Ts.
Therefore, the in-compartment fan 29 is operated only to make up for the above-mentioned shortage of the natural circulation of the cool air.
A relatively small one may be used, and a battery 3 as a driving power source may be used.
The capacity of 0 may be small. That is, the weights of the in-compartment fan 29 and the battery 30 are greatly reduced as compared with the conventional one. As a result, the weight of the cool box is reduced, the transport load weight increases, and the transport efficiency improves.

Although the present embodiment has been described with an internal fan, it is also possible to omit the internal fan if sufficient cooling can be obtained only by the natural circulation of cool air. In this case, the transport load increases by the weight of the internal fan and the battery.

[0028]

According to the first aspect of the present invention, a cool box body 1 having a heat insulating structure, a door 2 for opening and closing an opening 4 of the cool box body 1, and a cool storage unit for cooling the inside of the cool box body 1. 20 and a refrigerating device including a refrigerating device 19 including an evaporator 23 for cooling the regenerator 20, the regenerator 20 and the evaporator 23 are placed above the refrigerating room 5 in the regenerator main body 1. It is arranged so that the inside of the cool room 5 is cooled by the natural circulation of cool air from the cool storage unit 20 arranged above the cool room 5, so that the internal fan and the drive of the internal fan A power supply (that is, a battery) is not required, and the weight of the internal fan and the battery is reduced, so that the loading weight of the cool box can be increased by that amount, and the transport efficiency can be improved.

As in the invention of claim 2, claim 1
In the cold storage described above, when equipment other than the evaporator 23 constituting the refrigerating device 19 is disposed above the cold storage room 5 in the cold storage main body 1, the evaporator disposed in the cold storage room 5 23 and other devices arranged outside the cold storage room 5 are adjacent to each other, and the piping structure of the refrigerant piping in the refrigeration apparatus 19 can be simplified.

[0030] As in the invention of claim 3, claim 1
In the cool box according to any one of claims 2 and 3,
An internal fan 2 for circulating cool air through the cold storage room 5
In the case where the cooling chamber 9 is provided, it is possible to cope with the case where the temperature of the cold storage room 5 rises by forced cooling air circulation by operating the internal fan 29. In this case, since the internal fan 29 may be an auxiliary fan, the fan itself may be small, and the battery 30 as a driving power source may be small, and the weight of the cool box can be reduced. .

As in the invention of claim 4, claim 3
In the cool box described in the above, the inside temperature detecting means 31 for detecting the temperature inside the cool room 5 and the inside fan when the inside temperature detected by the inside temperature detecting means 31 exceeds a set temperature. 29, a control means 32 for operating the internal fan 2 is provided only when the internal temperature exceeds a set temperature.
9 is operated, and the internal temperature can always be maintained at or below the set temperature.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a part of a cool box according to an embodiment of the present invention.

FIG. 2 is a front view showing a cross section of a part of the cool box according to the embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of the cool box according to the embodiment of the present invention.

FIG. 4 is an enlarged perspective view of a regenerator in the cool box according to the embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of an in-compartment fan control means in the cool storage according to the embodiment of the present invention.

FIG. 6 is a flowchart showing operation control of an internal fan in the cool storage according to the embodiment of the present invention.

[Explanation of symbols]

1 is a cool box main body, 2 is a door, 4 is an opening, 5 is a cool box, 1
9 is a refrigerating device, 20 is a regenerator, 21 is a compressor, 22 is a condenser, 23 is an evaporator, 29 is a fan in a refrigerator, 30 is a drive power source (battery), 31 is a temperature detector in a refrigerator (temperature sensor). , 32 are control means (controller).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yuji Fujimoto Inventor 1304 Kanaokacho, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Sakai Seisakusho Kanaoka Plant F-term (reference) 3L045 AA02 AA07 BA02 BA10 CA02 DA02 EA01 GA07 HA01 KA14 LA09 MA02 NA02 PA02 PA03 PA04

Claims (4)

[Claims] An insulated cold storage body (1), a door (2) for opening and closing an opening (4) of the cold storage body (1), and cold storage for cooling the inside of the cold storage body (1). A refrigerator (19) including a refrigerator (20) and a refrigerating device (19) including an evaporator (23) for cooling the regenerator (20), wherein the regenerator (2)
0) and the evaporator (23) is disposed above a cold storage room (5) in the cold storage main body (1). 2. The apparatus according to claim 1, wherein equipment other than the evaporator (23) constituting the refrigerating device (19) is disposed above the cold storage room (5) in the cold storage main body (1). The refrigerator according to claim 1. 3. The cold storage chamber (5) is provided with an in-compartment fan (29) for circulating cool air, according to any one of claims 1 and 2, characterized in that: Cold storage. 4. An internal temperature detecting means (31) for detecting a temperature in the cool room (5), and an internal temperature detecting means (3).
Control means (32) for operating the internal fan (29) when the internal temperature detected by 1) exceeds a set temperature;
4. The refrigerator according to claim 3, further comprising: