WO2000037867A1

WO2000037867A1 - Cold insulated cabinet

Info

Publication number: WO2000037867A1
Application number: PCT/JP1999/007126
Authority: WO
Inventors: Sadanao Kurokawa; Akitoshi Ueno; Yuji Fujimoto
Original assignee: Daikin Industries, Ltd.
Priority date: 1998-12-21
Filing date: 1999-12-20
Publication date: 2000-06-29
Also published as: AU1689200A; JP2000186880A

Abstract

The cold insulated cabinet comprising a cold insulated cabinet body (1) of heat-insulated construction, a door (2) for opening and closing an opening (4) in the cold insulated cabinet body (1), a cool storage unit (20) cooling the interior of the cold insulated cabinet body (1), and a refrigerator (19) including an evaporator (23) for cooling the cool storage unit (20). The cool storage unit (20) and evaporator (23) are disposed on top of the cold insulated chamber (5) of the cold insulated cabinet body (1). The cold insulated chamber (5) is cooled by natural circulation of cold air from the cool storage unit (20).

Description

Description Cooler technical field

The present invention relates to a cool box which is loaded on a truck or the like and transported. Background art

In general, a cool box loaded and transported on a truck or the like includes, for example, a regenerator for cooling a cool room in the cool box, and a refrigerating device for cooling the regenerator. The refrigeration system operates only in the storage warehouse at the delivery terminal. Do not operate the refrigerator during transportation. During transportation, the objects stored in the cool box are kept cool by the cold stored in the cool storage.

Normally, this type of cool box has a regenerator at the bottom of the cool room. The cool air inside the refrigerator is forced to circulate by the fan inside the refrigerator. Solution 1

In this type of cool box, it is necessary to reduce the weight of the cool box itself in order to reduce transportation costs. However, in conventional cold storage, cold air in the refrigerator is forcedly circulated by a fan in the refrigerator. Therefore, a relatively large internal fan and a power supply for driving the internal fan, that is, a battery, are required. The weight of these devices is usually around 20 kg. There was a problem that the cool box became heavier by this weight, and the loading weight was limited.

The present invention has been made in view of the above points, and reduces the weight by circulating cold air in a refrigerator naturally or by circulating cold air only in a predetermined temperature of a refrigerator. Therefore, the purpose is to improve transportation efficiency. Disclosure of the invention

The first invention includes a cold storage main body 1 having a heat insulating structure, a door 2 for opening and closing the opening 4 of the cold storage main body 1, a regenerator 20 for cooling the interior of the refrigerating storage main body 1, and the regenerator And a refrigerating device 19 including an evaporator 23 for cooling 20. Then, the regenerator 20 and the evaporator 23 are disposed above a cold storage room 5 in the cold storage main body 1.

In the first invention, the inside of the cool storage room 5 is cooled by the natural circulation of cool air from the cool storage unit 20 provided above the cool storage room 5. For this reason, the in-compartment fan and the drive power for the in-compartment fan, that is, the battery are not required. Therefore, the weight of the in-compartment fan and battery is reduced, and the loading weight of the cool box increases accordingly.

According to a second invention, in the first invention, the equipment other than the evaporator (23) out of the equipment constituting the refrigeration apparatus (19) is replaced with a cold storage chamber (5) in the cold storage body (1). ).

In the second aspect of the invention, the evaporator 23 provided inside the cold storage room 5 is adjacent to another device provided outside the cold storage room 5. As a result, the piping structure of the refrigerant piping in the refrigerator 19 is simplified.

According to a third invention, in the first or second invention, an in-compartment fan (29) for circulating cool air is disposed in the cold storage room (5).

In the third aspect of the invention, when the temperature of the cold storage room 5 rises, the forced cooling air circulation by the operation of the in-compartment fan 29 responds. In this case, the internal fan 29 may be auxiliary. Therefore, the in-compartment fan 29 itself may be small, and the battery 30 serving as a driving power supply may be small. As a result, the weight of the cool box is reduced.

A fourth invention is the invention according to the third invention, wherein the inside temperature detection means (31) for detecting the temperature in the cool room (5) and the inside temperature detected by the inside temperature detection means (31). A control means (32) for operating the internal fan (29) when the internal temperature exceeds a set temperature is provided.

In the fourth aspect of the invention, the internal fan 29 is operated only when the internal temperature exceeds the set temperature, and the internal temperature is always maintained at or below the set temperature. Effect of the Invention—

According to the present invention, the regenerator 20 and the evaporator 23 are disposed above the cold storage room 5 so that the inside of the cold storage room 5 is cooled by natural circulation of cool air from the regenerator 20. Therefore, the in-compartment fan and the drive power supply for the in-compartment fan, that is, the battery is not required. Therefore, the weight of the in-compartment fan and battery is reduced, and the loading weight of the cool box can be increased by that amount, improving transport efficiency.

According to the second invention, since the components of the refrigerating device (19) other than the evaporator (23) are disposed above the cold room (5), they are disposed inside the cold room 5. The evaporator 23 can be adjacent to other equipment provided outside the cool room 5. As a result, the piping structure of the refrigerant piping in the refrigeration apparatus 19 can be simplified.

According to the third invention, since the in-compartment fan 29 for circulating cool air is arranged in the cool room 5, the forced cool air circulation by the operation of the in-compartment fan 29 when the temperature of the cool room 5 rises. Can be addressed by rings. In this case, the internal fan 29 may be auxiliary. Therefore, the in-compartment fan 29 itself may be small, and the battery 30 as a driving power source may be small. As a result, the weight of the cool box can be reduced.

According to the fourth invention, the inside temperature detection means (31) of the cool room (5) and the control means (3) for operating the inside fan (29) when the inside temperature exceeds the set temperature. 2), the internal fan 29 is operated only when the internal temperature exceeds the set temperature, so that the internal temperature can always be kept below the set temperature. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view showing a cross section of a part of a cool box according to an embodiment of the present invention. FIG. 2 is a front view in which a part of the cool box according to the embodiment of the present invention is sectioned. 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 the configuration of the control means of the internal fan in the cool box according to the embodiment of the present invention.

FIG. 6 is a flowchart showing operation control of the internal fan in the cool box according to the embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

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

As shown in FIGS. 1 and 2, the cool box of the present embodiment is loaded on a truck or the like and transported. The cool box includes a cool box body 1 having a heat insulating structure, a door 2 for opening and closing an opening of the cool box body 1, and a cool unit 3 provided in the cool box body 1.

The cool box main body 1 has an opening 4 on the front surface for taking in and out an object to be cooled, and is formed in a vertically long rectangular parallelepiped box shape. The cool box main body 1 includes a cool room 5 for accommodating an object to be cooled, and a machine room 6 partitioned and formed above a top plate 5 a of the cool room 5 and covered by a cover 17. ing.

The cover 7 has an air inlet 8 for sucking air into the machine room 6 and an air outlet 9 for blowing air from the machine room 6. A casing 10 for moving the cool box is provided below the cool box body 1.

The outer wall of the cool box 5 in the cool box body 1 is composed of a top plate 5a, both side plates 5b, 5b, a back plate 5c, and a bottom plate 5d. The outer wall is formed by filling a heat insulating material 13 between an inner plate 11 and an outer plate 12 made of synthetic resin. The outer wall of the machine room 6 is made of a single sheet of synthetic resin.

The door 2 is configured by filling a heat insulating material 16 between an inner plate 14 and an outer plate 15 made of synthetic resin. The cool box is provided with a handle 17 for opening and closing the door 2 and a lock device 18 for holding the door 2 in a closed state.

The cool keeping means 3 is composed of a cool storage device 20 for cooling the cool storage room 5 and a refrigerating device 19 including an evaporator 23 for cooling the cool storage device 20. The regenerator 20 is configured by storing a regenerator in a box-shaped case. As shown in Figure 3 and Figure 4 As described above, the regenerator 20 is attached by fixing the mounting bracket 25 to the top plate 5a of the cold storage room with the screw 26.

The refrigerating device 19 includes a compressor 21 disposed in the machine room 6, a condenser 22 disposed in the machine room 6, and a regenerator 20 in an upper part of the cool room 5. And an evaporator 23 attached to the lower surface of the evaporator.

The refrigerating device 19 includes an accumulator 24 and a cooling fan 27 for cooling the condenser 22. A drain pan 28 is arranged below the evaporator 23.

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 decompressed by an expansion valve (not shown). Thereafter, the refrigerant evaporates in the evaporator 23. The regenerator stored in the regenerator 20 is cooled by the latent heat of evaporation in the evaporator 23, and is stored in the regenerator 20. The operation of the refrigeration system 19 is performed only in the storage warehouse at the delivery terminal. The refrigeration system 19 is not operated during transportation of the cool box. During this transportation, the object to be cooled stored in the cool box is cooled by the cold stored in the cool storage unit 20.

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

Further, a temperature sensor 31 for detecting the temperature T in the refrigerator is provided on the rear side of the upper part of the cold storage room 5. That is, the temperature sensor 31 is disposed on the suction side of the regenerator 20 and functions as a refrigerator internal temperature detecting means.

The operation of the in-compartment fan 29 is controlled by the controller 32 based on the temperature information T of the temperature sensor 31 as shown in FIG. The controller 32 operates the internal fan 29 when the internal temperature T detected by the temperature sensor 31 exceeds a set temperature Ts. In other words, the controller 32 performs various arithmetic processes based on the temperature information T input from the temperature sensor 31 to control the internal fan 29. Acts as control means for driving.

The cool box configured as described above has the following functions and effects. The refrigeration system 19 is operated using the power supply of the storage warehouse at the final day of the delivery, and the regenerator 20 is cooled and stored. In the cool box, the object to be cooled is stored in the cool box 5 of the cool box body 1, and is transported by being loaded on a truck or the like. During this transportation, the operation of the refrigeration system 19 is stopped, and the object to be cooled is kept cool by the cool heat of the regenerator 20. At this time, the inside of the cool storage room 5 is normally kept cool by natural circulation of cool air from the cool storage unit 20.

By the way, this type of cool box is required to maintain the outside air temperature at 35 ° C and the inside temperature T of −18 ° C or less for 12 hours. However, if only the above-mentioned natural circulation of cool air is used, the inside temperature T may exceed −18 ° C. depending on the outside air temperature condition and inside condition. Therefore, in the present embodiment, the operation of the in-compartment fan 29 is controlled by the controller 32 to cope with an increase in the in-compartment temperature T.

Next, the operation control of the in-compartment fan 29 will be described in detail with reference to the flowchart of FIG.

In step S1, the detected temperature T is input from the temperature sensor 31. In step S2, the detected temperature T is compared with a set temperature Ts (for example, 18 ° C.). Here, if it is determined that T> Ts, in step S3, the in-compartment fan 29 is operated. By the operation of the in-compartment fan 29, the cool air from the regenerator 20 is forcibly circulated, and the temperature of the cool storage room 5 is lowered. During the operation of the in-compartment fan 29, the detected temperature T is input from the temperature sensor 31 in step S4.

Next, in step S5, the detected temperature T is compared with a value (Ts + hi) obtained by adding an additional temperature hi (hi <0) for preventing hunting to the set temperature Ts. Here, the operation of the in-compartment fan 29 is continued until T <Ts + one judgment is made. On the other hand, if it is determined that T <T s + one, the operation of the in-compartment fan 29 is stopped in step S6. Thereafter, the process returns from step S6 to step S1.

As described above, in the present embodiment, the in-compartment fan 29 is operated only when the in-compartment temperature を exceeds the set temperature Ts. In other words, the in-compartment fan 29 operates as described above for natural circulation of cold air. It is operated only to make up for the lack of rings. For this reason, the in-compartment fan 29 may be of a relatively small size, and the capacity of the battery 30 serving as a driving power source may be small.

Therefore, the weight of the in-compartment fan 29 and the battery 30 is greatly reduced as compared with the conventional one. As a result, while the weight of the cool box is reduced, the weight of the transport increases, and the transport efficiency is improved.

Note that the present embodiment has been described with the one provided with the in-compartment fan 29. However, if sufficient cooling can be obtained only by the natural circulation of cool air, the in-compartment fan 29 can be omitted. In this case, the load weight of the transport increases by the weight of the in-compartment fan 29 and the battery 30. Industrial applicability

As described above, the cool box according to the present invention is useful when transported by being loaded on a truck. In particular, the cool box of the present invention is suitable for securing an increase in the load capacity.

Claims

The scope of the claims

1. Insulated cold storage body (1), a door (2) for opening and closing the opening (4) of the cold storage body (1), and a regenerator (20) for cooling the inside of the cold storage 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: A cool box characterized by being placed above the cool room (5) in the cool box body (1).

2. In claim 1,

Among the equipment constituting the refrigerating apparatus (19), equipment other than the evaporator (23) is disposed above the cold storage room (5) in the cold storage body (1). .

3. In claim 1 or 2,

A cool box characterized by comprising an in-compartment fan (29) for circulating cool air in the cool room (5).

4. In claim 3,

An internal temperature detecting means (31) for detecting the temperature in the cold storage chamber (5); and an internal temperature sensor when the internal temperature detected by the internal temperature detecting means (31) exceeds a set temperature. And a control means (32) for operating the refrigeration unit (29).