JP3292676B2 - Insulated refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle cold reserving storage high in convenience which can indicates the completion of proper cold accumulation. SOLUTION: This cold reserving storage is equipped with a cooler which is provided with a cold accumulating agent within a storeroom and consists of a compressor 8 for cooling this cold accumulating agent, etc., and a controller 13 which controls the drive and drive stoppage of the compressor 8 so that the temperature of the cold accumulating agent measured by a cold accumulating agent temperature sensor 11 may be within the temperature range of cold accumulation completion temperature Ts and cold accumulating recovery temperature TR. In this case, a cold accumulation completion indication judgment temperature TD being a higher temperature than the cold accumulation completion temperature separately from this, and in case that the temperature of a cold accumulating agent is less than this cold accumulation completion indication judgment temperature TD at start of current application of an AC power source, this indicates the completion of cold accumulation on a display D, and in case that it is higher than the cold accumulation completion judgment temperature TD, this indicates the completion of cold accumulation on the display when the temperature of the cold accumulating agent reaches the said cold accumulation completion temperature Ts . Hereby, even in case that the power supply stops for a short time due to the carriage and shifting of the cold reserving storage, or the like and the temperature of the cold accumulating agent goes up a little, the completion of the cold accumulation is indicated immediately, so the waiting time to the indication of the cold accumulation completion is shortened, and this becomes one high in convenience.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transportable in-vehicle cooler in which a regenerator is disposed in a storage room and the regenerator is kept at a low temperature in the storage room.

[0002]

2. Description of the Related Art A conventional insulated refrigerator for a vehicle is provided with a regenerator for cooling the storage room and a cooling device for freezing the regenerator in a storage room for storing the articles. Are stored, and can be transported and moved to a place (for example, a truck or the like) to which power is not supplied while keeping the articles cool. Further, the cold storage operates a cooling device in a place where power can be supplied so that the regenerator temperature freezes to a predetermined regenerative storage completion temperature, and when the regenerator reaches a predetermined regenerative storage completion temperature. By displaying the completion of cold storage on the display device attached to the cool box, the freeze of the cold storage agent is completed, and the cold store operator is informed that the cold storage can be performed within a predetermined time without the supply of AC power. Tell

[0003]

However, in the conventional cool box, as described above, the completion of cold storage is displayed when the temperature of the cold storage agent reaches the predetermined temperature for setting the completion of cold storage.
The following difficulties may occur. That is, the cooling device temperature rises while the power supply is stopped during transportation or movement of the cool box, so that when the power supply is restarted, the cooling device is operated so that the cold storage agent temperature reaches the cold storage completion set temperature. The operation is restarted, and the display device does not display the cold storage completion until the cold storage agent temperature reaches the cold storage completion set temperature again. This cold storage completion display requires a long time before being displayed on the display device, even if the power supply stop time is short, since the heat capacity of the cold storage agent is large.

[0004] Therefore, in this case, if the power supply stoppage time due to transportation or the like is short, the temperature of the cold storage agent rises only slightly, and the time during which the cooling operation can be performed in the storage room during transportation and transportation is almost impossible. Even though there is no influence, it takes a long time until the cold storage completion is displayed. Therefore, the operator who intends to transport and move the cool box has to wait for the display for a long time, which is convenient. There is a drawback that it becomes low.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a highly convenient in-vehicle cool box which can appropriately display completion of cold storage.

[0006]

In order to achieve the above object, an invention according to claim 1 includes a storage room for articles having a cool storage agent for keeping cold, a cooling device for cooling the cool storage agent and storing the same,
Cool storage agent temperature measuring means for measuring the temperature of the cold storage agent, cold storage completion display means for displaying the completion of cold storage of the cold storage agent, and energization control of the cooling device based on the cold storage agent temperature measured by the cold storage agent temperature measuring means. Control means for holding the regenerator at the first cold storage completion set temperature and, when the first cold storage completion set temperature is reached, energizing the cold storage completion display means to display the completion of the cold storage, and energizing the control means during cold storage In the in-vehicle refrigeration compartment for stopping the energization of the control means and keeping the storage compartment cool during transporting, the vehicle has a second cold storage completion set temperature higher than the first cold storage completion set temperature, and The means controls the cold storage completion display means based on the first cold storage completion temperature when the cold storage agent temperature is higher than the second cold storage completion set temperature at the start of cold storage, and the cold storage completion when the cold storage agent temperature is lower than the second cold storage completion set temperature. And controlling, based the shown means to a second cold accumulating complete set temperature.

According to the present invention, the second cold storage completion set temperature is set higher than the first cold storage completion set temperature, and when the cold storage agent temperature is higher than the second cold storage completion set temperature at the start of cold storage, the first cold storage completion setting is performed. The cold storage completion display is controlled based on the temperature. Further, when the regenerator agent temperature is lower than the second cold storage completion set temperature at the start of cold storage, the cold storage completion display is controlled based on the second cold storage completion set temperature.

Further, the invention of claim 2 provides a storage room for articles having a cool storage agent for keeping cool, a cooling device for cooling the cool storage agent to store cold, and a cool storage agent temperature measuring means for measuring the temperature of the cool storage agent. Cold storage completion display means for displaying the completion of cold storage of the cold storage agent, and power supply control of the cooling device based on the cold storage temperature measured by the cold storage temperature measuring means to maintain the cold storage at the cold storage completion set temperature and cool storage. When the temperature reaches the completion set temperature, control means for energizing the cold storage completion display means to display the completion of cold storage is provided. In the in-vehicle cool box, having a stop time measuring means for measuring the power supply stop time during transport movement, and a storage means for storing a cold storage completion display of cold storage completion display means at the end of cold storage,
The control means causes the cold storage completion display means to display the cold storage completion display stored in the storage means when the power supply stop time has not reached the set time at the start of cold storage.

According to the present invention, when the power supply stop time has not reached the set time at the start of cold storage, the cold storage completion display at the end of cold storage is displayed on the cold storage completion display means.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 shows a first embodiment of an in-vehicle cool box according to the present invention. FIG. 1 is a perspective view of the cool box, FIG. 2 is a side sectional view of the cool box, FIG. 3 is a block diagram of a control device of the cool box, and FIG. 4 is a flowchart showing a process of the control device.

The insulated refrigerator 1 has a machine room 3 and a storage room 4 above and below inside a refrigerator body 2.
A door 5 that can be opened and closed is provided on the front surface so that articles P can be carried in and out of the inside. A plurality of regenerators 6 are fixedly arranged by a net-like regenerator fixture 7 in the upper half of the inner side wall and the rear wall of the storage room 4 and on the inner side of the ceiling wall, and the regenerator 6 cools the storage room 4. I do. Here, the cold storage agent fixing device 7 fixes the cold storage agent 6 and prevents the article P stored in the storage room 4 from coming into contact with the cold storage agent 6 so that the article P
Is prevented from supercooling and sticking to the regenerator 4. In addition, a display device D for displaying the room temperature of the storage room 4, the completion of the cold storage of the cold storage agent 6 and the like is attached to the front of the in-vehicle cool box 1, and various types are provided based on signals from a control device described later. Display information. The display device D includes, for example, a liquid crystal screen, an LED, and the like. Furthermore, the cool box body 2
Casters W are provided at the lower four corners to facilitate movement of the in-vehicle cool box 1.

The regenerator 6 is cooled by equipment such as an evaporator (not shown) which is thermally closely attached to the regenerator 6, a compressor 8, a condenser 9, and an expansion valve (not shown) arranged in the machine room 3. The refrigerant is cooled by circulating a refrigerant inside the device. Further, since the condenser 9 is heated during the operation of the cooling device, the blower 10 is provided adjacent to the condenser 9 for cooling. Cooling of the regenerator 6
This is performed by controlling the circulation of the refrigerant by driving and stopping the compressor 8 by a control device described later. Also,
One of the plurality of regenerators 6 is provided on its surface with a regenerator temperature sensor 11 connected to a control device described later.
It measures the regenerator temperature T of the regenerator 6 and outputs a temperature signal to the control device. The regenerator temperature sensor 11 is configured by an element such as a thermistor.

As shown in FIG. 3, the control device 12 for the in-vehicle refrigerator 1 comprises a one-chip microcomputer (hereinafter, referred to as a microcomputer) 12a, a memory 12b, a drive circuit 12c, and a DC power supply circuit 12d. The microcomputer 12a is connected to a DC power supply circuit
It operates by the power supply from the microcomputer 12a, and based on the temperature signal of the cold storage agent temperature sensor 11 connected to the microcomputer 12a, the driving circuit 12c
The operation of the compressor 8 is controlled via the. Also, microcomputer 1
A display device D is connected to 2a, and displays various information such as a cold storage completion display. The indication of the completion of cold storage is made by, for example, energizing and emitting an LED (not shown) provided on the display device D.

[0014] memory 12b is previously cold storage completion temperature T _S and the cold accumulating return temperature T _R is stored. Both are
Cold storage completion temperature T _S <has become a relationship that cold storage recovery temperature T _R, the operation of the cooling device to freeze and freeze maintain cold storage agent 6 within the scope of this cold accumulating completion temperature T _S and the cold storage recovery temperature T _R To control. For example, the cold storage completion temperature T _S
-3 ° C. As the temperature is set as -1 ° C. as cold storage recovery temperature T _R. The memory 12b, the cold storage completion temperature T _S are set to a higher temperature cold storage completion display determination temperature T _D are a storage than cold storage agent temperature of the refrigerant 13A 6 at the start cold storage due to energization start of the AC power source When T is equal to or lower than the cold storage completion display determination temperature T _D , the display device D displays cold storage completion. For example, a temperature of 1 ° C. is set.

Next, the in-vehicle cold storage 1 by the control device 12
Will be described with reference to the flowchart of FIG. Processing by the control device 12 is intended to be started with the energization of the AC power source, first compares the refrigerant 13A temperature T and stored in the memory 12b the cold storage completion display determination temperature T _D, who refrigerant 13A temperature T If the temperature is high, the process proceeds to step S102 to cool the regenerator 6, otherwise, the regenerator 6 is already cooled to a predetermined cooling capacity, so that the display device D indicates that the regenerator is completed. The process is moved to step S105 (step S101).

Next, in step S102, the compressor 8 is driven to start cooling the regenerator 6 (step S10).
2), this cooling is continued until the regenerator 6 becomes lower than the cold storage completion temperature T _S (Step S103), the driving of the compressor 8 is stopped, and the process proceeds to Step S105 (Step S104).

[0017] In step S105, since the refrigerant 13A temperature T is equal to or less than at least the cold storage completion display determination temperature T _D, and displays the cold storage completion to the display device D (step S1
05).

Finally, the regenerator temperature T becomes the regenerative return temperature T _R
The regenerator temperature T is monitored until it becomes higher, and the regenerator temperature T is monitored.
When but becomes higher than the cold storage restoration temperature T _R shifts the process to resume the cooling of the refrigerant 13A 6 to step S102 (step S106).

According to the in-vehicle cool box 1 of the present embodiment,
At the time when energization of the AC power supply is started, the temperature of the cold storage agent T
Is lower than the cool storage completion determination temperature T _D , the display device D displays the completion of cool storage. Thus, even if the power supply of the AC power supply is stopped for a short time due to the transportation movement of the in-vehicle cool box 1 or the like and the regenerator temperature T rises within a predetermined range, the display device D immediately displays the completion of the regenerative storage. Therefore, the waiting time until the cold storage completion display can be shortened. Also,
When energization of the AC power supply is resumed, when the refrigerant 13A temperature T is higher than the cold storage recovery determination temperature T _D, since the refrigerant 13A temperature T cold storage completion is displayed when it reaches the cold storage completion temperature T _S,
When the regenerator 6 is cooled from room temperature or when the AC power supply is stopped for a long time, the regenerator 6 can be sufficiently cooled and frozen.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
The embodiment will be described with reference to FIGS. Here, FIG. 5 is a block diagram of the control device of the cool box according to the present embodiment, and FIGS. 6 and 7 are flowcharts showing processing of the control device.

The difference between the present embodiment and the first embodiment is that the control device 12 is connected to the storage battery B, and the control device 12 is further provided with a power supply switching circuit 12e and a timer 12f to stop the supply of AC power. Even when the microcomputer 12a
And the timer 12f connected to the microcomputer 12a can measure the power supply stop time of the AC power supply.

The power supply switching circuit 12e includes a microcomputer 12
a and the DC power supply circuit 12d, and further connected to the storage battery B. In addition, the power supply switching circuit 12e
The presence / absence of power supply from the DC power supply circuit 12d is detected, whereby the presence / absence of energization of the AC power supply connected to the DC power supply circuit 12d is detected, and the detection result can be output to the microcomputer 12a. Further, when power is supplied from the DC power supply circuit 12d, the power is supplied to the microcomputer 12a. When the AC power supply is stopped and the power supply by the DC power supply circuit 12d is stopped, the storage battery B is supplied to the microcomputer 12a. Switch to the power supply.

The microcomputer 12a has a timer 12f.
Is connected, and the time can be measured by the instruction of the microcomputer 12a. Thereby, the power supply stop time tm of the AC power supply is measured based on the detection signal of the power supply ON / OFF of the AC power supply detected by the power supply switching circuit 12e. be able to.

[0024] memory 12b, as in the first embodiment, the cold storage completion temperature T _S and the cold accumulating return temperature T _R together with stored, predetermined set time A is stored. This set time A represents the time during which the regenerator 6 retains the same cooling capacity as when the regenerative storage is completed when the cooling device is stopped in a state where the regenerative storage of the regenerator 6 is completed. This is set in advance by an experiment or the like. For example, a time of 30 minutes is adopted as the set time A.

Next, the operation of the control device 12 will be described with reference to the flowcharts of FIGS. First, the process is started by the start of the operation of the in-vehicle cool box 1, and the maximum value is set to the energization stop time tm at the first time to pass step S203 (step S201). Note that the maximum value may be a value larger than the set time A.

Next, the power supply stop time t by the timer 12f
If m is smaller than the predetermined time A, step S
In step 211, the state of the cold storage completion display stored in the memory 12b is restored (steps S202 and S203). still,
As described above, step S203 is not processed in the first time, and step S211 has already been processed at the time of processing step S203. Therefore, the state of the cold storage completion display is always stored in the memory 12b.

Next, it is detected whether or not the AC power supply is energized. If the AC power supply is stopped, the process proceeds to step S211 (step S204). process if: cold storage recovery temperature T _R of moves to step S204 (step S20
5), the refrigerant 13A temperature T step process to cool a cold storage agent 6 if it becomes higher than a predetermined cold storage recovery temperature T _R S
Move to 206 (step S205).

Next, in step S206, the operation of the compressor 8 is started to cool the storage agent 6, and the process proceeds to step S207 (step S206).

Next, it is detected whether or not the AC power supply is energized. If the AC power supply is stopped, the process proceeds to step S211 (step S207). If the temperature is equal to or higher than the cold storage completion temperature T _{S, the} process proceeds to step S2 while the
07 transferred (step S208), if the refrigerant 13A temperature T is lower than a predetermined cold storage recovery temperature T _S transfer the process to prevent supercooling of the refrigerant 13A 6 to step S209 (step S208).

Finally, the operation of the compressor 8 is stopped to prevent the supercooling agent 6 from overcooling (step S209), and furthermore, the completion of the cold storage is displayed on the display device D, and the process proceeds to step S204 (step S210). .

In step S211, the process is started when the power supply to the AC power supply is stopped (steps S204 and S20).
8) First, the state of the cold storage completion display of the display device D is stored in the memory 12b. That is, when the energization of the AC power supply is stopped and the cold storage by the cooling device ends, it is stored whether or not the display device D indicates that the cold storage is completed (step S21).
1). Next, the energization stop time tm is cleared (step S
212), measurement by the timer 12f is started (step S213). Finally, it detects whether the AC power supply is energized,
If the AC power supply is started, the process proceeds to S202 to restart the control of the cooling device.

According to the in-vehicle cool box 1 of the present embodiment,
When energization of the AC power supply to the cooling device is started, if the energization stop time tm of the AC power supply is shorter than a predetermined set time A, the display device D indicates the completion of cold storage when the energization of the AC power supply is stopped. Is done. Thereby, even if the energization of the AC power supply is stopped for a short time due to the movement of the in-vehicle cool box 1 and the regenerator temperature T slightly rises, the cold storage completion display is displayed when the energization is stopped. Since the display of cold storage completion is displayed on the display device D immediately after the start of energization of the AC power supply, the waiting time until the cold storage completion display can be shortened.

[0033]

As described above in detail, according to the first aspect of the present invention, the second cold storage completion set temperature is set higher than the first cold storage completion set temperature, and when the cold storage starts, the second cold storage agent temperature is increased. When the temperature is higher than the completion set temperature, the cold storage completion display is controlled based on the first cool storage completion set temperature. Further, when the regenerator agent temperature is lower than the second cold storage completion set temperature at the start of cold storage, the cold storage completion display is controlled based on the second cold storage completion set temperature. Thereby, even when the power supply to the cold storage is stopped due to transportation or the like, when the power supply is started, an appropriate cold storage completion display is performed according to the temperature of the cold storage agent, which is highly convenient. Become.

According to the second aspect of the present invention, if the power supply stop time has not reached the set time at the start of cold storage, the cold storage completion display at the end of cold storage is displayed on the cold storage completion display means, so that transportation, transportation, etc. Therefore, even when the power supply to the cold storage is stopped, when the power supply is started, an appropriate cold storage completion display is performed according to the temperature of the cold storage agent, and the convenience is high.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a cool box;

FIG. 2 is a side sectional view showing the inside of a cool box;

FIG. 3 is a block diagram showing a configuration of a control device in the cool box according to the first embodiment.

FIG. 4 is a flowchart showing processing of a control device in the cool box according to the first embodiment;

FIG. 5 is a block diagram showing a configuration of a control device in a cool box according to the second embodiment.

FIG. 6 is a flowchart showing processing of a control device in a cool box according to the second embodiment.

FIG. 7 is a flowchart showing processing of a control device in a cool box according to the second embodiment;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Insulated cooler for vehicles, 4 ... Storage room, 6 ... Cold storage agent, 8 ... Compressor, 12 ... Control device, 12a ... One chip microcomputer, 1
2b ... memory, 12c ... drive circuit, 12d ... DC power supply circuit, 12e ... power switching circuit, 12f ... timer, D ... display device, B ... battery, T _S ... cold storage completion temperature, T _R ... cool storage recovery temperature, T _D ... Cold storage completion display determination temperature, tm...

Claims (2)

(57) [Claims] 1. A storage room for articles having a cool storage agent for keeping cool, a cooling device for cooling the cool storage agent to store cold, a cool storage agent temperature measuring means for measuring the temperature of the cool storage agent, and completion of cold storage of the cool storage agent Storage completion display means for displaying the cold storage agent temperature, the cooling device is energized based on the cold storage agent temperature measured by the cold storage agent temperature measurement means to maintain the cold storage agent at the first cold storage completion set temperature and the first cold storage completion set temperature. Control means for energizing the cold storage completion display means to indicate the completion of cold storage when the temperature reaches the temperature, and energizing the control means during cold storage, and stopping the power supply to the control means during transportation to keep the storage room cool. A second cold storage completion temperature set higher than the first cold storage completion setting temperature, and the control unit is configured to control when the cold storage agent temperature is higher than the second cold storage completion setting temperature at the start of cold storage. Is cold storage The completion display means controlled on the basis of the first regenerative complete set temperature, vehicle refrigerator is lower than the second regenerative complete set temperature, characterized in that the control on the basis of the cold storage completion display means to the second cold accumulating complete set temperature. 2. A storage room for an article having a regenerator for cold storage, a cooling device for cooling the regenerator and storing the cold, a regenerator temperature measuring means for measuring the temperature of the regenerator, and the completion of the regenerator storage When the cold storage completion display means and the cold storage agent temperature measured by the cold storage agent temperature measurement means, the cooling device is energized to maintain the cold storage at the cold storage completion set temperature and when the cold storage completion set temperature is reached. Is equipped with a control means for energizing the cold storage completion display means to display the completion of cold storage, energizing the control means through an external power supply during cold storage, and energizing the control means through an internal power supply during transportation and transportation. A stop time measuring means for measuring a power supply stop time during movement, and a storage means for storing a cold storage completion display of a cold storage completion display means at the end of cold storage, wherein the control means is configured to stop power supply at the start of cold storage. There vehicle refrigerator according to claim is possible to display has been cold storage completion indication stored in the storage means in the cold storage completion display unit when not reached the set time.