JP2001355953A - Cold insulation box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold insulation box for simplifying the power supply device of a blower and at the same time reducing power supply capacity and reducing costs. SOLUTION: Each blower 4 for condensers and a blower 5 for the inside of the box are driven by a DC power supply device 7 when they are connected to an external power supply A, and the blower 5 for the inside of the box is driven by a DC battery 6 when the connection with the external power supply A is canceled. Therefore, when they are connected to the external power supply A, each blower 4 for condensers and the blower 5 for the inside of the box cannot be driven by each separate power supply, thus simplifying the power supply device. Also, when the blowers 4 and 5 are to be operated, the operation of the blowers 4 and 5 is started with a specific time difference each other, thus preventing an activation current from increasing as in the case where the operation of the blowers 4 and 5 is started simultaneously, thus reducing the power supply capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool box used as a container for transporting fresh food.

[0002]

2. Description of the Related Art Conventionally, as this kind of cool box, as described in Japanese Patent Application Laid-Open No. 10-73360, for example, a heat-insulating cool box body having an opening / closing door on the front side and a bottom side inside the box. Is known, which comprises a regenerative cooler disposed in a refrigerator, a refrigerating device for refrigerating the cooler, and an in-compartment blower that circulates air in the compartment. In this cool box, the refrigerating device is driven by an external power supply to cool the cooler, and after the connection with the external power supply is released, the DC internal power supply previously charged by the external power supply is used to store the cooler inside the refrigerator. The air blower is driven to circulate the air inside the refrigerator to perform a cooling operation during transportation. Further, a machine room is provided at an upper part of the cool box main body, and a plurality of condenser blowers for blowing air for cooling to the condenser of the refrigerating device are arranged in the machine room in a width direction of the cool box main body. .

[0003]

In the cool box, the blower for the cool box may operate when articles are stored in the cool box body during the cool storage of the cooler. Even in such a case, the internal blower is driven by a DC power supply. However, since each condenser blower uses an AC motor and is driven by an external AC power supply, there is a problem that power consumption is larger than that of a DC motor.

Therefore, if a DC motor is used for the condenser blower, the power consumption can be reduced. However, if a DC power supply for driving the compressor blower is separately added, the power supply becomes complicated, and the manufacturing becomes complicated. There was a problem that the cost was high. In addition, if the DC power supply of the in-compartment blower is shared with the compressor blower, the power supply can be made smaller than in the above-described case.However, the cool box has a plurality of condenser blowers. Therefore, there is a problem that the starting current when starting the operation of each blower increases, and a correspondingly large power supply capacity is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a cold storage device capable of simplifying a power supply device of a blower, reducing a power supply capacity and reducing cost. To provide a warehouse.

[0006]

In order to achieve the above object, according to the present invention, there is provided a cold storage main body capable of storing an arbitrary article, and a cold storage type disposed at a predetermined position in the cold storage main body. A cooler, a refrigerating device that cools the cooler, a plurality of condenser blowers that blows cooling air to the condenser of the refrigerating device, and an in-compartment blower that circulates the in-compartment air through the cooler, It has a DC internal power supply that is charged by an external power supply.When connected to the external power supply, the refrigeration system is driven to cool the cooler, and when the connection to the external power supply is released, the internal power supply is used. In a cool box that drives the inside blower to circulate the inside air, a DC power supply that converts the current of the external power supply from AC to DC,
When connected to an external power supply, each blower for the condenser and the blower for the interior are driven by a DC power supply, respectively.
When the connection to the external power supply is released, the power supply switching means for driving the internal blower by the internal power supply, and when operating each of the condenser blower and the internal blower, the operation of each of the blowers has a predetermined time difference from each other. Control means for starting the operation. Thereby, when connected to the external power supply, each condenser blower and the internal blower are driven by the DC power supply device, and when the connection with the external power supply is released, the internal blower is driven by the DC internal power supply. Therefore, when connected to an external power supply, each of the condenser blowers and the in-compartment blowers is not driven by separate power supplies. Further, when the respective blowers are operated, the operations of the respective blowers are started with a predetermined time difference from each other, so that the starting current does not increase as in the case where the operations of the respective blowers are started simultaneously.

According to a second aspect of the present invention, in the cold storage of the first aspect, each of the condenser blower and the internal blower is driven by a single DC power supply device.
Thereby, each blower is driven by a single DC power supply.

According to a third aspect of the present invention, in the refrigerator according to the first or second aspect, when the blower for the condenser is operated, the blower for the refrigerator is stopped when the blower for the refrigerator is operating. Thereafter, a control means is provided for starting the operation of each blower at a predetermined time difference from each other. Accordingly, in addition to the operation of claim 1 or 2, when the internal blower is operating when each condenser blower is operated, the operation of each blower is stopped after the internal blower stops. Therefore, even when each condenser blower and the in-compartment blower are individually controlled, the current required at the time of starting each condenser blower does not increase.

[0009]

1 to 4 show an embodiment of the present invention. FIG. 1 is an overall perspective view of a cool box, FIG. 2 is a side sectional view thereof, and FIG. 3 is a block diagram thereof. 4 is a time chart showing the operation of the control unit.

This cool box has a heat-insulating cool box body 1 having an open front surface, a cool storage type cooler 2 for cooling the inside of the cool box, a refrigerating device 3 for refrigerating the cooler 2, and a refrigerating device 3. A total of two condenser blowers 4 for blowing cooling air to the condenser,
An internal blower 5 for circulating air in the refrigerator, a battery 6 as an internal power supply, a DC power supply 7 for converting the current of the external power supply A from AC to DC, and a DC power supply for each of the blowers 4 and 5 A power supply switch 8 for switching to one of the power supply device 6 and the battery 5 and a control unit 9 for controlling the operation of each of the blowers 4 and 5 are provided.

The refrigerator compartment body 1 has a heat-insulating door 1a for opening and closing a front opening, and a caster 1b for movement is attached to a lower portion of the refrigerator compartment body 1. Further, a machine room 1c is provided in an upper part of the cool box main body 1. Ventilation passages 1e are provided on the bottom side and the back side in the cool box main body 1 by a partition plate 1d, and one end side of the ventilation path 1e is opened to a lower front end side in the refrigerator. The end side opens to the upper part on the back side in the storage.

The cooler 2 is arranged in a ventilation path 1e on the bottom side of the cool box main body 1, and its upper part is covered by a partition plate 1d. The cooler 2 includes a refrigerant pipe 2 connected to a refrigeration circuit.
and a cold storage material (not shown) that is in thermal contact with the refrigerant pipe 2a
The cold storage material is cooled by the low-temperature refrigerant flowing through the refrigerant pipe 2a, and the inside of the refrigerator is cooled by the cold storage material.

The refrigerating apparatus 3 comprises a well-known refrigerating circuit comprising a cooler 2 (evaporator), a compressor 3a and a condenser 3b. The compressor 3a and the condenser 3b are housed in a machine room 1c. I have.

The condenser blowers 4 are arranged in the machine room 1c, and are arranged side by side in the width direction of the cool box main body 1 (not shown). The condenser blowers 4 are rotated by DC motors M1 and M2, respectively, and the motors M1 and M2 are connected to a motor drive circuit 10.

The in-compartment blower 5 is arranged at the other end of the ventilation passage 1e, and discharges air taken in from one end of the ventilation passage 1e into the compartment from the other end of the ventilation passage 1e. The internal blower 5 is configured to be rotated by a DC motor M3, and the motor M3 is connected to a motor drive circuit 10.

The battery 6 is connected to an external power supply A (for example, a single-phase 200 volt commercial AC power supply) via a charger 6a, and stores DC power by the external power supply A.

The DC power supply 7 is connected to an external power supply A,
The current of the external power supply A is converted from AC to DC.

The power supply switch 8 comprises a relay driven by the external power supply A, and when connected to the external power supply A, connects the DC power supply 7 to the motor drive circuit 10 and releases the connection with the external power supply A. The motor drive circuit 10
The switching operation is performed so that the battery 6 is connected to the switch.

The control unit 9 is constituted by a microcomputer and is connected to the motor drive circuit 10. The control unit 9 operates and stops each of the blowers 4 and 5 based on a detection signal of a not-shown internal temperature sensor or a cold storage temperature sensor, and operates the blowers 4 and 5 when the blowers 4 and 5 are operated. The operations are started with a predetermined time difference from each other.

In the cool box constructed as described above, the refrigerating apparatus 3 is operated by connection to the external power supply A, and the cooler 2 is cooled. At this time, each condenser blower 4 operates together with the compressor 3a of the refrigerating device 3 to blow cooling air to the condenser 3b, and the inside blower 5 operates to cool the inside of the refrigerator. In this case, each blower 4,
5 are each driven by a DC power supply 7. When the connection to the external power supply A is released, for example, when the cool box is used for transporting goods, the power supply used by the motor drive circuit 10 is switched to the battery 6 by the power supply switch 8, and the air blower for the refrigerator is used. 5 is driven by the battery 6.

When operating each of the blowers 4 and 5, as shown in the time chart of FIG. 4, the operation of one condenser blower 4 is first started, and after a predetermined time T1 (for example, 2 seconds) has elapsed. Then, the operation of the other condenser blower 4 is started, and after a predetermined time T1 has elapsed, the operation of the in-compartment blower 5 is started. Further, when each of the condenser blowers 4 is operated, if the in-compartment blower 5 is operating, the in-compartment blower 5 is stopped, and after a predetermined time T2 (for example, 1 second) has elapsed, the same as described above. The operation of one condenser blower 4 is started, and after a predetermined time T1 (for example, 2 seconds) elapses, the operation of another condenser blower 4 is started, and after the predetermined time T1 elapses,
The operation of the internal blower 5 is started.

As described above, according to the cool box of the present embodiment, when connected to the external power supply A, each of the condenser blower 4 and the internal blower 5 is driven by the DC power supply 7, and the external power supply A When the connection is released, the internal blower 5
Is driven by the DC battery 6,
When connected to the external power supply A, each of the condenser blowers 4 and the in-compartment blowers 5 is not driven by a separate power supply, and the power supply device for each of the blowers 4 and 5 can be simplified. .

When the fans 4 and 5 are operated, the operations of the fans 4 and 5 are started with a predetermined time difference from each other, so that the operations of the fans 4 and 5 are started simultaneously. Without such an increase in starting current,
The power supply capacity can be reduced. At that time, when the in-compartment blower 5 is operating when each condenser blower 4 is operated, and the startup current of the in-compartment blower 5 is smaller than the activation current of each condenser blower 4, By stopping the in-compartment blower 5 and then starting the operation of each of the blowers 4 and 5 with a time difference therebetween, even when each of the condenser blower 4 and the in-compartment blower 5 is individually controlled, The current required at the time of starting the blower 4 for the condenser does not increase, and the power supply capacity can be reliably reduced.

Further, since each of the blowers 4 and 5 is driven by a single DC power supply 7, the power supply can be further simplified.

In the above-described embodiment, an example is shown in which the total number of the blowers 5 for the inside of the refrigerator is one and the number of the blowers 4 for the condenser is two. Similar effects can be obtained when a plurality of internal blowers 5 are provided.

[0026]

As described above, according to the cold storage of claim 1, when connected to an external power supply, each of the condenser blower and the internal blower is driven by a separate power supply. Therefore, the power supply device for each blower can be simplified, and the starting current does not increase as in the case where the operation of each blower is started simultaneously.
The cost can be reduced by reducing the power supply capacity.

According to the cold storage of the second aspect, in addition to the effect of the first aspect, the power supply device can be further simplified, which is extremely advantageous for practical use.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, even when each of the condenser blowers and the in-compartment blowers are individually controlled, the start of each condenser blower is started. Since the sometimes required current does not increase, it is possible to reliably reduce the power supply capacity.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a cool box showing one embodiment of the present invention.

FIG. 2 is a side cross-sectional view of a cool box;

FIG. 3 is a block diagram of a cool box;

FIG. 4 is a time chart showing an operation of a control unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cold storage main body, 2 ... Cooler, 3 ... Refrigeration apparatus, 4 ... Blower for condenser, 5 ... Blower for storage, 6 ... Battery, 7 ... DC power supply, 8 ... Power supply switching device, 9 ... Control part, A: External power supply.

Claims (3)

[Claims] 1. An insulated refrigerator main body capable of storing an arbitrary article,
A regenerative cooler arranged at a predetermined position in the cool box body, a refrigerating device for refrigerating the cooler, a plurality of condenser blowers for blowing cooling air to a condenser of the refrigerating device, and Equipped with an internal blower that circulates through a cooler, and a DC internal power supply that is charged by an external power supply, and when connected to an external power supply, drives a refrigerating apparatus to cool the cooler, A DC power supply for converting the current of the external power supply from AC to DC in a cool box in which the internal power supply drives the internal blower to circulate the internal air when the connection with the external power supply is released. And, when connected to an external power supply, each blower for the condenser and the blower for the interior are driven by a DC power supply device, respectively,
When the connection with the external power supply is released, the power supply switching means for driving the internal blower by the internal power supply, and when operating each of the condenser blower and the internal blower, the operation of each blower has a predetermined time difference from each other. And a control means for starting the cold storage. 2. The refrigerator according to claim 1, wherein each of the condenser blower and the internal blower is driven by a single DC power supply device. 3. When activating each of the condenser blowers, if the in-compartment blowers are operating, the in-compartment blowers are stopped, and then the operations of the respective blowers are started with a predetermined time difference from each other. 3. The refrigerator according to claim 1, further comprising control means.