JPH01318872A - Regenerative-type cold reserving container - Google Patents

Abstract

PURPOSE:To prevent the quality of articles to be transported from being lowered and enable an optimum cold reserving condition to be maintained by providing a first temperature-discriminating means for discriminating the lowering of the temperature of a cold heat accumulating agent to or below a predetermined temperature, and a display means for displaying the completion of a regenerating operation according to a signal from the temperature-discriminating means. CONSTITUTION:The interior of a main body 21 of a cold storage filled with articles 20 to be transported is cooled by the latent heat of melting of a cold heat accumulating agent 26 and by a ventilating fan 32. A controlling means 44 for the fan 32 detects the temperature inside the cold storage 33, and performs ON/OFF control of the fan 32. A first temperature-discriminating means 38 outputs a signal when the temperature of the agent 26 detected by a temperature-detecting part 37 is lowered below a preset temperature. Based on an output from a regeneration end-discriminating means 46 for discriminating the completion of a regenerating operation, a display means 47 displays the completion of the regenerating operation, thereby showing that articles 20 to be transported can be transported at any time thereafter. Therefore, the person in charge of the transportation can prevent the quality of the articles 20 from being deteriorated due to insufficient regeneration arising from a mistake made by a person.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cold storage type refrigerator that uses a cold storage agent to keep the inside of the refrigerator cold, and is used for transporting products that require refrigeration or freezing, such as fresh foods and medicines. be.

BACKGROUND OF THE INVENTION In recent years, small-sized cold storage refrigerators have been used for delivery by trucks and the like in the distribution of fresh foods.

An example of the above-mentioned conventional cold storage type cold storage box will be described below with reference to the drawings.

FIG. 4 is a longitudinal sectional view showing the structure of a conventional cold storage type cold storage. In FIG. 4, reference numeral 1 denotes a cold storage box body, which is composed of a cabinet 2 containing a heat insulating material, a door 3, and a gasket 4 for sealing the door 3 and the cabinet 2 together. Reference numeral 6 denotes a cold storage room, which is composed of a latent heat type cold storage agent 6 having a freezing point lower than the set internal temperature of the cold storage box, and a cooler 7 for cooling and solidifying the cold storage agent 6. It is formed. 8 is an air supply fan, and 9 is a defrosting heater built into the cooler 7. 1o is a heat insulating compartment wall having heat insulating properties, 11 is a ventilation hole provided at two locations in the heat insulating compartment wall 10, and 12 is a vent installed in the heat insulating compartment wall 10 near one of the ventilation holes 11. It is a ventilation fan. 13
is a cold storage room, which is divided by the heat insulating partition wall 1o and formed at the lower part of the cold storage main body 1. A compressor 14 is installed outside the lower heated wall of the cold storage chamber 13. Reference numeral 15 denotes a capacitor, which is built in the outer peripheral surface of the heat insulating wall of the cold storage main body 1, excluding the cold storage chamber 13 of the cold storage main body 1.

A compressor 14, a condenser 16, and a capillary tube (not shown) are connected in series to form a refrigerator unit 16, which is connected to a cooler 7 in a cold storage chamber 6 to form a refrigeration cycle. Reference numeral 17 denotes a temperature sensor body for controlling the freezing temperature of the cold storage agent 6, and a temperature sensing portion 18 is attached to the upper surface of the heat insulating partition wall 10. 19 is a power cord.

The operation of the cold storage type refrigerator constructed as described above will be explained below with reference to FIG. 4.

First, the cold storage operation is performed by plugging the power cord 19 into the power source and operating the compressor 14. Then, the cool storage agent 6 is cooled by the cooled cooler 7, and when the cool storage agent 8 is completely cooled and solidified and the temperature of the temperature detection part 18 reaches a predetermined temperature lower than the freezing temperature, the temperature sensor 17 is activated. The operation of the compressor 14 is stopped. Thereafter, the compressor 14 is repeatedly operated and stopped, and the freezing temperature of the cool storage agent 6 is controlled within a certain temperature range so that the temperature of the cool storage agent 6 does not drop too much.

Next, the case where it is used for refrigerated transportation will be explained.

First, the ventilation fan 12 is operated by a rechargeable storage battery (not shown) that has been charged during the cold storage operation.

Then, the cold air cooled by the cold storage agent 6 flows from the ventilation hole 11 to the cold storage chamber 13 (Ill) and cools the cold storage chamber 13.

Then, after putting the cooled transportation goods 20 such as fresh food brought from the production area etc. into the cold storage room 13, the power cord 1
9 from the power source, and the operation of the compressor 14 is stopped. Then, it is loaded onto a transport truck or the like and transported to the destination. At this time, the inside of the cold storage main body 1 is cooled by the cold storage chamber 5, which is cooled by the latent heat of fusion of the cold storage agent 6.
Preventing the temperature of the transported goods 16 from rising.

Problems to be Solved by the Invention However, with the above configuration, it was not possible to tell when the cold storage operation was completed. For this reason, it is possible that the person in charge of transportation may load the transported items into a cool storage type refrigerator that has not yet completed cold storage, and in this case, sufficient cooling capacity may not be obtained and the temperature inside the refrigerator will rise by the time it arrives. This poses a problem in that the quality of important transported goods deteriorates. In addition, the cold storage time also changes due to changes and differences in outside air temperature (for example, seasonal, regional differences, stormy night differences, etc.) and differences in the operating hours of the cold storage, so it was not possible to manage the cold storage time.

In view of the above-mentioned problems, the present invention allows anyone to easily confirm that cold storage operation has been completed, eliminates quality deterioration of transported goods due to human error, and maintains optimal cold storage conditions at all times regardless of ambient conditions. To provide a highly economical cold storage type refrigerator that can

Means for Solving the Problems In order to solve the above problems, the cold storage type cold storage box of the present invention has a first step that determines that the temperature of the cold storage agent has fallen below a predetermined value.
The apparatus includes a temperature determination means and a display means for displaying that the cold storage operation has been completed by the first temperature determination means.

According to the above-described configuration, the present invention provides a display indicating that the cold storage operation is completed and preparation is completed when the temperature of the cold storage agent during the cold storage operation has fallen below a certain certain temperature. Notify that the goods can be transported.

Therefore, transport personnel can easily decide which cold storage type refrigerator to select just by checking the display.

EXAMPLE Hereinafter, a cold storage type refrigerator according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram of a cold storage type refrigerator according to an embodiment of the present invention. In FIG. 1, 21 is the main body of the cold storage cabinet, which includes a cabinet 22 with a built-in heat insulating material, a door 23, and a gasket 24 that seals the door 23 and the cabinet 22.
It is composed of. Reference numeral 26 denotes a cold storage chamber, which is formed on the top of the cold storage main body 21 and is composed of a latent heat type cold storage agent 2e having a freezing point lower than the set internal temperature of the cold storage and a cooler 27 that cools and solidifies the cold storage agent 26. has been done. 28 is an air supply fan, and 29 is a defrosting heater built into the cooler 27. 30 is a heat insulating compartment wall having heat insulating properties, 31 is a ventilation hole provided at two places in the heat insulating compartment wall 3o, and 32 is a vent installed in the heat insulating compartment wall 30 near one of the ventilation holes 31. It is a ventilation fan. Reference numeral 33 denotes a cold storage room, which is partitioned by the heat insulating partition wall 3o and formed at the lower part of the cold storage main body 21. 34 is a compressor and cold storage chamber 23
It is installed outside the bottom of the thermal wall. 36 is a capacitor,
It is built into the outer peripheral surface of the heat insulating wall of the cold storage main body 21, except for the cold storage chamber 33 of the cold storage main body 21. A compressor 34, a condenser 35, and a capillary tube (not shown) are connected in series to form a refrigerator unit 36, which is connected to the cooler 7 of the cold storage chamber 6 to form a refrigeration cycle. 37 is a temperature detection unit that detects the temperature of the cool storage agent 26;
The air blowing fan 28 on the opposite side to the air blowing fan 28 near the air blowing fan 6
It is installed with a certain heat capacity in a position where it is difficult to receive direct sunlight from the wind. Reference numeral 38 denotes a first temperature determination means that sends a signal when the temperature detected by the temperature detection section 37 becomes lower than a preset temperature T1. Reference numeral 39 denotes a timer means for transmitting a signal after a certain period of time after the first temperature determining means 38 sends the signal. 40 is a second temperature determination means for comparing the temperature detected by the temperature detection unit 37 with a preset temperature T2 (set to be T2 minus T1), and 41 is a second temperature The compressor 3 is determined by the determination means 40.
This is a compressor control means for controlling 0N10FF of No. 4.

42 is a charger that charges the rechargeable battery 43 during cold storage operation. Reference numeral 44 denotes a ventilation fan control means for controlling the 0N10FF of the ventilation fan 32 in response to the supply of a stain source from the rechargeable storage battery 43 during the cold preservation operation.

Reference numeral 46 denotes a charging end detection means that sends a signal when charging of the rechargeable storage battery 43 from the charger 42 is completed. 46
Reference numeral 47 indicates a cold storage completion determination means for determining that the cold storage operation is completed based on the signals sent from the timer means 39 and the charging completion detection means 45, and 47 indicates a cold storage completion determination means 46 that determines that the cold storage operation has been completed and preparation is complete. Display means for indicating something (e.g. LED).

neon lamps, etc.). 48 is a power cord.

The operation of the cold storage type refrigerator constructed as described above will be explained below with reference to FIG. 1.

First, the cold storage operation is performed by plugging the power cord 48 into the power source and operating the compressor 34. The cold storage agent 26 is then cooled by the cooled cooler 27. As the temperature of the cool storage agent 26 decreases, the temperature of the temperature detection section 37 of the cool storage agent 26 also decreases. When the cooling progresses further and the temperature reaches T1, the timer means 39 starts operating at the same time as a signal is sent out indicating that the temperature is lower than the set temperature of the first temperature determining means 38.

After a certain period of time has elapsed, the timer means 39 sends out a signal.

When the cooling further progresses and the temperature reaches T2, it becomes lower than the set temperature of the second temperature determining means 4o and a signal is sent. When the compressor control means 41 receives the signal, the compressor 34 is stopped and the cooling operation is stopped.

After the cooling operation is stopped, the temperature of the temperature sensor 37 rises and becomes T2+.
When ΔT2 (ΔT2 Hachi° Influential) exceeds 4°, the compressor 34 operates again and performs cooling operation. In this way, the compressor 34 repeats 0N10FF to maintain the cool storage agent 26 at a constant temperature. Also, during this cold storage operation, the rechargeable storage battery 43 is charged by the charger 43. When the rechargeable storage battery 43 is almost fully charged, a signal is sent from the charging end detection means 46. Timer means 3
When the cold storage completion determining means 46 determines that the cold storage operation is completed when the signal from 9Y and the signal from the charging end detection means 46 are both generated, the display means 47 indicates that the cold storage operation has been completed. Inform the user that preparations are OK.

Next, the case where it is used for refrigerated transportation will be explained.

First, the person in charge of transportation confirms that the preparation of the refrigerator body is complete, and then puts the cooled transport goods 20, such as fresh food brought from production areas, into the refrigerator body 21, and then connects the power cord 48. Unplug the power supply.

Then, it is loaded onto a transport truck or the like and transported to the destination.

At this time, the inside of the cold storage main body 21 is cooled by the latent heat of fusion of the cold storage agent 26 and the ventilation fan 32 controlled by the ventilation fan control means 44, thereby preventing the temperature of the transported goods 2o from rising.

Here, the ventilation fan control means 44 detects, for example, the temperature inside the cold storage chamber 33 and controls the ventilation 7-amp 32 to 0N10FF.

Next, the charging end detection means 46 will be explained in more detail with reference to FIGS. 2 and 3. Figure 2 shows charging end detection means 4.
FIG. 6 is a detailed block diagram of FIG. A rechargeable storage battery 43 is charged via a power plug 48 and a charger 42. 4
Reference numeral 9 denotes a current detection resistor inserted in at least one line between the charger 42 and the rechargeable storage battery 43.

60 is a detection means for detecting the voltage across the resistor 49; 61
Reference numeral 62 denotes a determining means for determining the detected value of the detecting means 50, and delay means 62 delays the output of the determining means 61 by a certain period of time, the output of which is connected to the cold storage completion determining means 4e.

The operation of the charging end detection means 45 configured as described above will be explained below with reference to FIGS. 2 and 3. Third
The figure is a time chart showing (a) terminal voltage and (d) charging current during charging, and here, a constant voltage charging method, which is a common charging method, is shown as an example. Charging starts at time t1. At this time, the charging current is 11 due to the constant current control of the charger 42, and charging is performed at a constant current. Then rechargeable storage battery 4
The terminal voltage of No. 3 increases as charging progresses. Furthermore, when the charging end voltage v2 is reached at time 1114 t2, the charging current gradually decreases due to the constant voltage control of g942. As the voltage decreases, the voltage across the resistor 49 also decreases in proportion. Detecting means 60 detects this voltage.
The comparison means 51 performs a comparison with the set current setting. When the charging current further decreases and becomes smaller than the set current (2), the comparison means 61 sends out a signal. Furthermore, the time is delayed by the delay means 62, and a charge completion signal is sent out at time t4.

As described above, according to this embodiment, the first temperature determining means 38 determines the temperature of the cool storage agent, the charging end detecting means 45 detects that charging is completed, the first temperature determining means 38 and the charging end By providing a cold storage completion determination means 46 that determines that the cold storage operation is completed by the detection means 46 and a display means that displays based on the output of the cold storage completion determination means 46, the cold storage temperature of the cold storage agent 26 can be set to a certain constant temperature. By attaching a display indicating that the cold storage operation has been completed under the conditions that the bottom is closed and the rechargeable storage battery 43 has completed charging, it is notified that the transported goods 2o can be transported at any time. Therefore, transportation personnel can grasp the cold storage status of the cold storage type refrigerator simply by checking the display, thereby preventing quality deterioration of transported goods due to insufficient cold storage due to human error ((
It can be prevented. Furthermore, since the cold storage state can be managed at the level of the person in charge, the cost required for conventional management such as time entry can be reduced, which also leads to a reduction in running costs.

Furthermore, regardless of the influence of ambient temperature or differences in transportation time, appropriate cold storage operation can be achieved at all times, thereby preventing quality deterioration of transported goods. Further, by providing the timer means 39, the cold storage operation can be performed sufficiently by waiting a certain period of time instead of simply making a determination based on the temperature. Furthermore, by providing the delay means 62, it is more likely to be charged! The imaginary body is also K so that it is always sufficiently charged.

In addition, in the embodiment, the first temperature determination means 38 and the second Iu
Although the degree determination means 40 are provided separately, they may be the same when the condition 'r1='r2 is established.

Furthermore, although a method of detecting the charging current was used to detect the end of charging, a method of detecting the voltage may also be used.

In addition, the display means may be not limited to displays such as lamps and LEDs, but may be any means for providing warnings or other notifications within the scope of the present invention.

Effects of the Invention As described above, the present invention provides a first temperature determination means for determining the temperature of the cool storage agent, and a display means for displaying that the first temperature determination means has completed the cold storage operation. Since the person in charge can grasp the cold storage status, it is possible to prevent quality deterioration of transported goods due to human error, and it is possible to maintain optimal cold storage conditions at all times, regardless of ambient conditions such as outside temperature. In addition, management is possible only through display, which provides the advantage of providing very easy management.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a cold storage type refrigerator according to an embodiment of the present invention, FIG. 2 is a detailed block diagram of a charging end detection means, and FIG. 3 is a terminal voltage during charging. A time chart showing the charging current, and FIG. 4 are longitudinal cross-sectional views showing the structure of a conventional cold storage type cold storage box. 21...Cold box main body, 26...Cold storage chamber, 26...Cold storage agent, 27...Cooler,
28...Air supply fan, 3o...Insulation compartment wall, 32...Ventilation fan, 33...
Cold storage room, 38...First temperature determination means, 42...
...Charger, 43...Rechargeable storage battery, 45
. . . Charging end detection means, 46 . . . Cool storage completion determination means, 47 . . . Display means. Name of agent: Patent attorney Toshio Nakao and 1 other box
2 mouths Figure 3

Claims (1)

[Claims] The main body of the cold storage is composed of a cold storage chamber containing a cooler containing a built-in cold storage agent and an air supply fan, and a cold storage chamber for keeping transported items such as food cold, and a ventilation hole is provided to partition the cold storage chamber and the cold storage chamber. a heat-insulating partition wall, a ventilation fan that operates only during cold storage transportation, a first temperature determination means for determining that the temperature of the cold storage agent has fallen below a predetermined value, and a cold storage operation performed by the first temperature determination means. A cold storage type cold storage box equipped with a display means for displaying completion.