JPH1130470A - Vehicle-mounted insulating container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle-mounted insulating container that can efficiently and positively radiate the heat of a battery charger, prevents reverse-flow current when starting charging, and furthermore can accurately recognize the charging and cold storage state. SOLUTION: A vehicle-mounted insulating container has an evaporator, a fan for circulating in the container, a compressor 13, a condenser 14, and a fan 15 for the condenser, at the same time, uses a storage battery 17 being charged through a battery charger as the power supply of the fan for circulating in the container, and drives the compressor 13 and the fan 15 for the condenser by using an external AC power supply when a cold storage agent is cooled. In the vehicle-mounted insulating container, the condenser 14 and the battery charger are arranged in parallel so that they oppose the flow direction of wind due to the fan 15 for the condenser, thus efficiently cooling the battery charger without being affected by heat exchange air passing through the condenser 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle refrigerator for storing fresh foods, medicines and the like which need to be kept cool and transported by truck or other automobile.

[0002]

2. Description of the Related Art Conventionally, when delivering goods such as fresh foods that need to be kept cool, goods from a client are once collected at a collection place, loaded onto a car from the collection place, and cooled while being cooled. A distribution system for delivery has been established, and when this article is to be loaded on a car, the article is stored in advance in an in-car cool box, and the in-car cool box is loaded on the car.

[0003] Such a refrigerator for in-vehicle use has a structure in which a refrigerant → a condenser is cooled by sequentially circulating a compressor → a condenser → an expansion valve → an evaporator → a compressor and a refrigerant. When transporting, the cool heat of the cool storage agent is circulated in the cool storage main body by the internal circulation fan to keep the articles cool.

In addition, an AC power supply provided at a collection site or the like is used as a power supply of the cooling device during the cold storage of the regenerator.
The storage battery mounted on the in-vehicle cool box is used as the power supply for the internal circulation fan.

[0005]

Incidentally, in the above-mentioned conventional cold storage compartment for a vehicle, the condenser must be cooled when the cooling device is driven, and power is supplied to the storage battery when charging the storage battery. As the charger heats up, it must cool down.

Conventionally, a condenser and a charger are installed on the leeward side of a condenser fan to cool them. However, the arrangement of the two is such that the condenser is the most leeward side and the charger is located on the leeward side. , The heated air is blown through the condenser to this charger, for example, when the outside air temperature is 35 ° C.
In the midsummer season, the temperature in the vicinity of the charger rises to about 62 ° C., which may cause insufficient cooling of the charger.

The condenser fan is driven based on a detection signal of a temperature sensor for detecting the temperature of the regenerator, that is, is driven only when the regenerator needs to be cooled. However, there is a problem that the charger cannot be reliably cooled at the time of charging because the battery is driven irrelevantly.

Further, when charging a storage battery, it takes a predetermined time until current starts flowing from the charger to the storage battery at the start of charging. Therefore, when the charger and the storage battery are immediately connected at the start of charging, the storage battery is connected to the charger. There is a problem that the current flows backward, which causes a failure of a charger or the like.

Further, in general, the charger continues charging for a predetermined period of time after the AC power is once turned off, even if the storage battery has been completely charged, in order to prevent charging failure, and outputs a charge completion signal. It is configured not to output.
Therefore, when the AC power supply is turned off to move the in-vehicle cooler in a charged state, for example, the non-energized time is displayed even if the non-energized time is a short time.
There was a problem that charging was performed again. In addition, since the cold storage completion display of the cold storage agent is based on the output of the charge completion signal, even if the cold storage agent is in the cold storage completed state, the cold storage incomplete state remains as long as the charging is not completed. There is a problem that the state of the regenerator is displayed and the state of the regenerator cannot be accurately recognized.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to efficiently and reliably dissipate heat from a charger.
Another object of the present invention is to provide an in-vehicle cool box that prevents a backflow current at the start of charging and that can accurately recognize the state of charge and cool storage.

[0011]

According to the present invention, in order to solve the above-mentioned problems, an invention according to claim 1 cools a regenerator as a component of a cooling device that keeps articles stored in a cool box body. An evaporator, a circulating fan for circulating the cold heat of the regenerator into the refrigerator, a condenser for liquefying the refrigerant discharged from the compressor, and a condenser fan for air-cooling the condenser. When a rechargeable battery is charged through a charger as a power source and the regenerator is cooled, an external AC power source is used to drive the compressor and the condenser fan. The structure is such that the fan is arranged in parallel so as to face the flow direction of the wind.

According to the present invention, since the condenser and the charger are arranged in parallel so as to be opposed to the flow direction of the wind by the condenser fan, the charger affects the heat exchange air passing through the condenser. Without being cooled efficiently.

According to a second aspect of the present invention, there is provided a charge detecting means for detecting whether or not charging of the storage battery is completed, and a temperature detecting means for detecting a temperature of the cold storage agent, and based on a detection signal of the charge detecting means. Before the charging is completed, the condenser fan is driven and controlled. After the charging is completed, the condenser fan is driven and controlled based on the detection signal of the temperature detecting unit.

According to the present invention, since the condenser fan can be driven based on the detection signal of the charge detection means before the completion of charging of the storage battery, the charger is reliably cooled. When the battery is not charged, the condenser fan is controlled based on the detection signal of the temperature detecting means as usual.

According to a fifth aspect of the present invention, there is provided storage means for storing display contents of the charge display means and the cold storage display means for a predetermined time after the AC power is turned off, and the control means performs the AC operation during the predetermined time. Since the storage contents of the storage means are displayed on the charge display means and the cold storage display means when the power is supplied, the charging state and the cold storage state when the AC power is turned off even when the AC power is once turned off. Is displayed on each display means, and the charging and cold storage states can be accurately recognized.

According to a sixth aspect of the present invention, the switch means is inserted into the power supply circuit from the charger to the storage battery, and the control means is configured to close the switch means after a lapse of a predetermined time from the turning on of the AC power supply. In addition, backflow from the storage battery to the charger at the start of charging is prevented.

[0017]

1 to 4 show a first embodiment of an in-vehicle cool box according to the present invention. FIG. 1 is a sectional view of the in-vehicle cool box, and FIG. FIG. 3 is a plan view showing an arrangement state of each device, FIG.
5 is a flowchart showing drive control of a compressor and a condenser.

First, a schematic configuration of a vehicle cold storage according to the present embodiment will be described with reference to FIGS. The in-vehicle cool box 10 is a movable type, and is a vertically long box-shaped cool box body 1.
1 and is formed of a heat insulating material so that the articles stored in the cool box main body 11 are not affected by the outside air temperature. In addition, a machine room 12 is provided on a ceiling wall 11a of the cool box main body 11, and the machine room 12 includes a compressor 13, a condenser 14, a condenser fan 15, and a charger 23 in which a charger 23 is accommodated. A box 16, a storage battery 17, and the like are installed, and an evaporator 19 provided with a cold storage agent 18 and a fan 20 for circulating in the storage are installed below the cool storage main body 11, and cooled by these devices 13 to 20. Make up the equipment.

When the cooler 18 stores cold in the cooler 18, each of the devices 13 to 19 except for the internal circulation fan 20 is stored.
Is operated, air is sucked from an air suction panel 12a on the front of the machine room 12 as shown by a two-dot chain line arrow in FIG.
At 9, heat exchange is performed with the cold storage agent 18 to cool the cold storage agent 18. When the cold storage is completed, the internal circulation fan 20
Only the cool storage agent 18 is operated to circulate the inside of the cool storage body 11 through the duct 21 in the cool storage body 11 as shown by the one-dot chain line arrow in FIG. When the cold storage in the cool box main body 11 is completed, the front door 22 is opened to store articles such as fresh food products in the cool box main body 11, and the cool box 10 is loaded on a transport vehicle. to deliver.

In the cooling device configured as described above,
As shown in FIG. 2, the condenser fan 15 is
2, the condenser 14 and the charger box 16 are installed on the front side of the machine room 12, and the charger box 16 and the condenser 14 are connected to the condenser fan 15.
It is arranged on the windward side of. The charger box 16 and the condenser 14 are arranged in parallel so as to face each other with respect to the flow direction of the wind.

Next, a drive circuit of the in-vehicle cool box will be described with reference to FIG. That is, it has a compressor 13, a condenser fan 15, a charger 23, a stabilized DC power supply 24, and a relay 25, which are supplied with power from an AC power supply, and charges the storage battery 17 through the charger 23. The energization of the compressor 13 and the condenser fan 15 is controlled by a microcomputer (hereinafter, referred to as a microcomputer) 26. The microcomputer 26 has a cool storage agent temperature sensor 27 for detecting the temperature of the cool storage agent 18. The detected temperature is input, and an on / off signal of the switch 28 is input based on the charging completion state of the storage battery 17.

The relay 25 has switches 25a and 25b which are linked to energization and non-energization. Here, one switch 25a is connected to either the DC stabilized power supply 24 or the storage battery 17, and the other switch 25b is configured to form a closed circuit or an open circuit by the switching. When the relay 25 is energized, one switch 25a is connected to the stabilized DC power supply 24. Conversely, when not energized, the switch 25a is connected to the storage battery 17. The other switch 25b
Becomes a closed circuit when the relay 25 is energized and becomes an open circuit when the relay 25 is de-energized, whereby the microcomputer 26 detects whether the AC power supply is the power supply source or the storage battery 17 is the power supply source. .

The compressor 13 and the condenser fan 15
Is controlled by relays 29 and 30. That is, relay 2
9 and 30 are connected to output drivers 31 and 32 of an inverter IC operated by a control signal of a microcomputer 26,
The switches 29a and 30a of the relays 29 and 30 are connected to the compressor 1
3 or is inserted into the circuit of the condenser fan 15, and controls the compressor 13 and the condenser fan 15 based on a control signal of the microcomputer 26. Note that a DC stabilized power supply 24 or a storage battery 17 connected via a switch 25a is used as a power supply for the relays 29 and 30.

Further, the microcomputer 26 has a switch 28
Is input. That is, the terminal voltage rises with the charging of the storage battery 17, and when the terminal voltage becomes equal to or higher than the set voltage, the switch 28 is closed to form a closed circuit, thereby detecting that the charging of the storage battery 17 is completed.

When the cooling of the regenerator 18 and the charging of the storage battery 17 are simultaneously performed in the driving circuit of the in-vehicle refrigerator 10 thus configured, the compressor 13 and the condenser fan 15 are shown in the flowchart of FIG. Drive control as follows.

That is, when the AC power supply is turned on, the voltage V from the DC stabilized power supply 24 is applied to the relays 29 and 30 through the switch 25a to drive the compressor 13 and the condenser fan 15, while the storage battery 17 Is charged through the charger 23.

During this operation, the temperature of the regenerator 18 becomes -36.
It is determined based on the detection signal of the cold storage agent temperature sensor 27 whether or not the temperature is lower than or equal to (° C.) (S1). If the temperature is not lower than −36 ° C., the compressor 13 and the condenser fan 15 are turned off. It drives and accumulates cold in the regenerator 18 (S2). On the other hand, when the temperature is lower than −36 ° C., the regenerative operation is terminated, and the compressor 13 is stopped, but the operation of the condenser fan 15 is continued (S
3).

During this operation, the microcomputer 26 monitors whether or not a charge completion signal of the storage battery 17 has been input (S4). That is, when the charging of the storage battery 17 is completed, the terminal voltage increases. When this voltage exceeds the set voltage, the switch 28 is closed and the charge completion signal is
6 is output. Here, when the charge completion signal has not yet been input, that is, when the charging of the storage battery 17 has not been completed, the operation of the condenser fan 15 is continued. The dexterous fan 15 is stopped (S5, S6). Such steps S3 to S6
Is performed until the temperature of the regenerator reaches -31 ° C.

When the operation of the compressor 13 is stopped and the regenerator 18 is melted and the temperature of the regenerator 18 becomes -31.degree. C. or more, the process returns to step 1 and the compressor 13 and the condenser fan 15 are turned on again. It drives and cools the cold storage agent 18 (S7).

As described above, according to the present embodiment, the charger box 16 containing the condenser 14 and the charger 23 is arranged in parallel so as to face the flow direction of the wind by the condenser fan 15. Therefore, the charger 23 is connected to the condenser 1
It is cooled efficiently without being affected by the heat exchange air that has passed through it.

Also, the condenser fan 15 is driven during charging of the storage battery 17 irrespective of the cold storage operation of the cold storage agent 18, so that during charging, air is constantly blown to the charger box 16, and the charger 23 is reliably cooled. Is done.

When the condenser fan 15 ventilates the condenser 14 for a long time while the compressor 13 is stopped, the refrigerant may stagnate in the condenser 14. Since the compressor 13 may be driven, and the condenser fan 15 is driven in synchronization with the compressor 13 after charging is completed, the driving time of the condenser fan 15 while the compressor is stopped may not be long. Therefore, there is substantially no trouble such as stagnation of the refrigerant.

FIGS. 5 to 7 show a second embodiment of the in-vehicle cool box according to the present invention. FIG. 5 is a drive circuit diagram of the in-vehicle cool box, and FIG. 6 is a flowchart showing drive control of a charge switch. FIG. 7 is a flowchart showing the drive control of each display.

In this embodiment, a relay 34 is connected to an output driver 33 of an inverter IC operated by a control signal of the microcomputer 26. The charging switches 34a and 34b of the relay 34 connect the charger 23 to the storage battery 17. Inserted in the circuit to be used. Further, it has a charge indicator 35 and a cool storage indicator 36 which are operated by a control signal of the microcomputer 26. When the charge indicator 35 detects the completion of charging, it displays this by a lamp. Is cold storage agent 18
When the temperature reaches the cold storage completion temperature, a lamp is displayed.

When the AC power supply is turned on to start charging in the in-vehicle cool box thus configured, as shown in FIG. 6, time measurement is started and a predetermined time (for example, 0.5 seconds after energization) is applied. Has elapsed, the charging switches 34a, 3
4b is closed (S1 to S3). Thereby, charging is started.

As described above, since there is a time delay between turning on the power to the charger 23 and energizing the storage battery 17, there is a problem at the time of starting charging, that is, from the storage battery 18 to the charger 2
3 can be prevented from flowing back.

Each indicator 35, 36 at the time of charging is
Will be described with reference to FIG. Due to charging, the terminal voltage of the storage battery 17 is equal to or higher than the set voltage (higher than the charging completion voltage)
Is reached, the completion of charging is indicated by a lamp on the charging indicator 35, and the completion of charging is stored in the storage means (memory) of the microcomputer 26 (S1 to S5).
3). On the other hand, when charging is completed and the temperature of the regenerator reaches the regenerator temperature (-36 ° C. or lower), the regenerator display 36 displays a lamp indicating that the regenerator has completed the regenerative storage, and also indicates in the storage means that the regenerator has completed the regenerative storage. Memorize (S4-S
6).

After the completion of the charging or the storage of the cold energy is stored, when the application of the alternating current is temporarily stopped due to the movement of the in-vehicle refrigerator, the elapsed time is monitored for a predetermined time (for example, 15 minutes) (S7). ~ S9). When the power is turned on again during this time measurement, the display of the completion of charging or the completion of cold storage stored in the storage means is displayed on each of the indicators 35 and 36.
And the completion display is performed (S10, S11).

Normally, even after the AC power is turned off and the power is turned on again, the storage battery 17 is used to prevent charging failure.
Charging is continued for 2-3 hours. In this embodiment, in such a case, the charging completion state is displayed on the display 35, so that unnecessary charging can be avoided. Further, the completion of cold storage on the premise of charging completion can be displayed, and there is no need to perform unnecessary cold storage. When such time runs out,
The contents stored in the storage means are deleted (S12).

The other structure and operation are the same as those of the first embodiment.

[0041]

As described above, according to the first aspect of the present invention, the condenser and the charger are arranged in parallel so as to be opposed to the flow direction of the wind by the condenser fan. Is efficiently cooled without being affected by the heat exchange air passing through the condenser.

According to the second aspect of the present invention, since the condenser fan is driven during the charging of the storage battery regardless of the operation of the cold storage agent, the charger is reliably cooled, and the failure due to the self-heating of the charger. Can be reliably prevented.

According to the fifth aspect of the present invention, even when the AC power supply is once turned off, the charging state and the cold storage state when the AC power supply is turned off are displayed on the respective display means of the third and fourth aspects. , The state of charge and cool storage can be accurately recognized.

According to the invention of claim 6, backflow from the storage battery to the charger at the start of charging is prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of an in-vehicle cool box according to a first embodiment.

FIG. 2 is a plan view showing an arrangement state of each device of the in-vehicle cool box according to the first embodiment;

FIG. 3 is a drive circuit diagram of the in-vehicle cool box according to the first embodiment;

FIG. 4 is a flowchart illustrating drive control of a compressor and a condenser according to the first embodiment.

FIG. 5 is a drive circuit diagram of the in-vehicle cool box according to the second embodiment.

FIG. 6 is a flowchart illustrating drive control of a charge switch according to a second embodiment.

FIG. 7 is a flowchart illustrating drive control of each display device according to the second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Car cool box, 11 ... Cool box main body, 13 ... Compressor, 14 ... Condenser, 15 ... Condenser fan, 17 ... Storage battery, 18 ... Cold storage agent, 19 ... Evaporator, 20 ... Internal circulation fan 23, a charger, 26, a microcomputer, 27, a regenerator temperature sensor, 28, a relay switch, 35, a charge indicator,
36 ... cool storage indicator.

Continuing on the front page (72) Inventor Toshihiro Takizawa 20th Kotobukicho, Isesaki-shi, Gunma

Claims (6)

[Claims] An evaporator for cooling a regenerator, a circulating fan for circulating the cool heat of the regenerator in the refrigerator, and a compression as components of a cooling device for keeping the articles stored in the refrigerator main body cool. A condenser for liquefying the refrigerant discharged from the machine, and a condenser fan for air-cooling the condenser, and using a storage battery charged through a charger as a power supply for the internal circulation fan to cool the regenerator. When the compressor and the condenser fan are driven by using an external AC power supply, the condenser and the charger are arranged in parallel with each other so as to oppose the flow direction of the wind by the condenser fan. An in-vehicle cool box characterized by being placed in a refrigerator. 2. A charge detecting device for detecting whether or not the charging of the storage battery is completed, and a temperature detecting device for detecting a temperature of the regenerator, and the charging is completed based on a detection signal of the charging detecting device. The in-vehicle refrigerator according to claim 1, further comprising control means for driving the condenser fan before driving, and for controlling driving of the condenser fan based on a detection signal of the temperature detecting means after charging is completed. 3. The in-vehicle cool box according to claim 2, further comprising charge display means for displaying the completion of charging, and wherein said control means drives said charge display means when charging is completed. 4. The in-vehicle cold storage according to claim 2, further comprising cold storage display means for displaying cold storage completion, and wherein said control means drives said cold storage display means when cold storage is completed. Warehouse. 5. A storage device for storing display contents of said charge display means and said cool storage display means for a predetermined time after the AC power supply is turned off, and said control means controls said AC power supply during said predetermined time. 5. The in-vehicle cold storage according to claim 4, wherein the storage contents of the storage means are displayed on the charge display means and the cold storage display means when power is supplied to the storage means. 6. A switch means is inserted into an energization circuit from the charger to the storage battery, and the control means closes the switch means after a lapse of a predetermined time from the turning on of the AC power supply. An in-vehicle cold storage according to any one of claims 1 to 5.