JPH02122180A - Cold storage type insulated container - Google Patents

Abstract

PURPOSE:To provide two switchable temperature ranges for freezing and refrigerating by providing a cold storage temperature controller that controls the cooling temperature of cold storage medium at different temperature lower or higher than the melting point, and a selector switch which links with a cold keeping temperature controller that controls the temperature in an insulated compartment at different temperature for freezing and refrigerating. CONSTITUTION:In case an insulated container is used for freezing transportation at a freezing set point (-18 deg.C), a selection switch 46 is turned to 46b side, and a power source cord 47 is disconnected from a power source to stop the operation of a compressor 41. The container is loaded on a truck, etc., and transported to a destination. At this time, a ventilating fan 38 is brought into operation by supplying electric power through the selector switch 36a for freezing, and a cold storage temperature controller 44a is also put into action, so that cold air cooled by the melting latent heat of cold storage medium flows through the inside of the wall 23 of the insulated container, and is discharged into an insulated compartment 40 through an air outlet 37 to cool the insulated compartment 40. In case the container is used for insulating transportation at a refrigerating set point (0 deg.C or 5 deg.C), the ventilating fan 38 is brought into operation by supplying electric power through the selector switch 36b or 36c for refrigerating, and a cold keeping temperature controller 44b is also put into action, so that cold air cooled by the sensible heat of the cold storage medium flows into the insulated compartment 40 through the air outlet 37 to cool the insulated compartment 40.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cold-storage type refrigerator that uses a cold storage agent to keep the inside of the refrigerator cold.

Conventional technology In recent years, the distribution of trucks, etc. in the distribution of fresh foods has increased. Small cold storage refrigerators are being used for transportation.

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 chamber, which is composed of a latent heat plate cold storage agent 6 having a melting point approximately υ10°C lower than the set internal temperature of the cold storage chamber, and a cooler element for cooling and solidifying the cold storage agent 6. It is formed on the top of the. 8 is a blower fan, and 9 is a defrosting heater built into the cooler 7. 1o is a heat insulating compartment wall having heat insulating properties, and 11 is the heat insulating compartment wall 1o.
12 is a ventilation fan installed in the heat insulating partition wall 10 near one of the ventilation holes 11. Reference numeral 13 denotes a cold storage room, which is partitioned by the heat insulating partition wall 10 and formed at the lower part of the cold storage main body 1. Reference numeral 14 denotes a cold storage temperature detector main body, and a cold storage temperature detection section 15 is attached to the inner wall surface of the cold storage chamber 3 page 13.

A compressor 16 is installed outside the lower wall of the cold storage chamber 13. 17 is a condenser, which is installed in the cold storage chamber 1 of the cold storage main body 1.
Except for 3, it is built into the outer peripheral surface of the heat insulating wall of the cold storage main body 1. A compressor 16, a condenser 17, and a capillary tube (not shown) are connected in series to create a refrigerator unit 18.
It is connected to the cooler 7 of the cold storage chamber 5 to form a refrigeration cycle. Reference numeral 19 denotes a cold storage temperature detector body that detects cold storage and controls the freezing temperature of the cold storage agent 6, and has a temperature detection section 20 attached to the upper surface of the heat insulating partition wall 10. 21 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 21 into the power source and operating the compressor 16. Then, the cold storage agent 6 is cooled by the cooled cooler 7, and when the cold storage agent 6 is completely cooled and solidified and the temperature of the cold storage temperature detection part 2Q reaches a predetermined temperature lower than the freezing temperature, the cold storage temperature detector 19 is activated and the operation of the compressor 16 is stopped. Thereafter, the compressor 16 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 7 is operated. Then, the cold air cooled by the cold storage agent 6 flows through the ventilation hole 11 to the cold storage chamber 13 side.
The cold storage chamber 13 is cooled. After the cooled transport goods 22, such as fresh food brought from the production area, are placed in the cold storage chamber 13, the power cord 21 is disconnected from the power supply, and the operation of the compressor 16 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 chamber 1 is cooled by the latent heat of fusion of the cold storage agent 6.
The transported goods 22 are cooled to prevent the temperature of the transported goods 22 from rising. At this time, the compressor 16 is stopped and high-temperature refrigerant is not flowing to the condenser 17, so the refrigerator main body 1
There is no heat effect on the inside, and the load heat amount does not increase.

Problems to be Solved by the Invention Page 5 However, with the above configuration, there is no function to switch the temperature inside the refrigerator main body 1 to freezing or refrigeration during cold storage transportation, and the temperature changes depending on the freezing point of the selected cold storage agent. The problem was that only the cold storage temperature of refrigerators could be used.

In view of the above-mentioned problems, the present invention provides a cold storage type cold storage box having a cooling capacity selection function that allows switching between two cold storage temperature ranges, freezing and refrigerating, using one cold storage agent.

Means for Solving the Problems In order to solve the above problems, the cold storage type cold storage box with a refrigerator of the present invention includes a latent heat type cold storage agent having a melting point of about -30°C installed in the cold storage chamber, and the cold storage agent. A refrigerator unit that forms a cooling cycle with a cooler that cools and freezes, a cold storage temperature controller that controls the cooling temperature of the cold storage agent to a different temperature higher than or lower than the melting point, and a cooling/refrigeration unit in the cold storage room. It is equipped with a cold storage temperature regulator main body that controls different temperatures, and a changeover switch that interlocks the two. It has a configuration in which freezing is selected to be lower than the melting point, and the temperature in the cold storage chamber is changed by changing the cooling/freezing temperature of the cold storage agent and the amount of heat storage.

Effects According to the present invention, with the above-described configuration, when the set temperature of the cold storage chamber is in the refrigeration range, the temperature of the cold storage chamber can be set to refrigeration by cooling the cold storage agent only to a temperature higher than the melting point.

In addition, when the set temperature of the cold storage room is in the freezing range, the cooling capacity during cold storage can be increased by supercooling the cold storage agent to a temperature lower than its melting point and freezing it. It can be set to freezing, and the cold storage temperature of the refrigerator/freezer can be easily switched by simply selecting the changeover switch.

EXAMPLE Hereinafter, a cold storage type refrigerator according to an example of the present invention will be described with reference to FIGS. 1 to 3.

In the figure, 23 is the main body of the refrigerator, which includes a cabinet 24 with a built-in heat insulating material, a door 25, 26, and a cabinet 24.
It is composed of a gasket 26 and seven vanes for sealing. Reference numeral 27 denotes a cold storage chamber, which is formed on the top of the cold storage main body 17 and is composed of a latent heat type cold storage agent 28 having a low melting point of about -30°C and a cooler 29 for cooling and solidifying the cold storage agent 28. has been done. 30 is an air supply fan, and 31 is a defrosting lid built into the cooler 29. 32 is a heat insulating partition wall having heat insulating properties, 33 is an intake hole provided at one end of the heat insulating partition wall 32, 34 is a main body of a cold storage temperature controller, and a cold storage temperature detection unit 35 is provided near the intake hole 33. is installed. 36 is a changeover switch for freezing -18℃ 36a1 refrigerating o℃36b1 refrigerating 5℃36C
Three temperatures can be selected. Reference numeral 37 indicates a ventilation hole disposed at the opposite end of the intake hole 33, and reference numeral 38 indicates a ventilation fan installed near the ventilation hole 37. 39 is a driving element (
The ventilation fan 38 is operated and stopped by the cold storage room temperature controller main body 34 (battery).

Reference numeral 40 denotes a cold storage room, which is divided into multiple sections by the heat insulating partition wall 32 and formed at the lower part of the cold storage main body 23. A compressor 41 is installed outside the lower insulation wall of the cold storage room 4o. Reference numeral 42 denotes a capacitor, which is built in the outer peripheral surface of the heat insulating wall of the cold storage main body 23, excluding the cold storage chamber 40 of the cold storage main body 23. A compressor 42, a condenser 42, and a capillary tube (not shown) are connected in series to form a refrigerator unit 43,
It is connected to the cooler 29 of the cold storage chamber 27 to form a refrigeration cycle. 44 is 44a, which is higher than the melting point in frozen cold storage;
Or, in the cold storage, the cold storage temperature controller body controls the cooling temperature of the two types of cold storage agents 28 of 44b, which are lower than the melting point,
A cold storage temperature detection section 46 is attached to the upper surface of the heat insulation section warm wall 32. 46 is a cold storage/cold preservation selection switch, and 47 is a power cord.

The operation of the cold storage type refrigerator constructed as described above will be explained below with reference to FIGS. 1, 2, and 3.

First, in cold storage operation with frozen (-18℃) cold storage setting, plug the power cord 46 into the power source, and turn the switch 36 to 3.
6a, the selection switch 46 is used to energize 46a to operate the compressor 41 and perform the cold storage operation with nine vanes. Then, the cold storage agent 28 is cooled by the cooled cooler 29.
When the cold storage agent 28 is completely cooled and solidified and the temperature of the cold storage temperature detection unit 45 reaches a predetermined temperature (point A in FIG. 3) that is about 5 degrees lower than the melting temperature, the cold storage temperature controller 44
a is activated and the operation of the compressor 41 is stopped. After that, the compressor 41 is operated.

The freezing temperature of the cold storage agent 28 is controlled within a certain temperature range so that the temperature of the cold storage agent 28 does not rise or fall too much.

Also, cold storage operation with cold storage settings (○°C, 5°C) will be explained. The selector switch 36 is used to energize 3eb or 36c, and the selection switch 46 is used to energize 46a, and the compressor 41
and perform cold storage operation.

Then, the cool storage agent 28 is cooled by the cooler 29, and the cool storage agent 28 is cooled.
8, when the temperature of the cold storage temperature detection part 45 reaches a predetermined temperature (point B in FIG. 3) higher than the melting point, the cold storage temperature controller 44b is activated, and the compressor 41 is repeatedly operated and stopped, and the same operation is performed. The cooling temperature of the cool storage agent 28 is controlled within a predetermined temperature range.

Next, a case will be described in which the cold storage 10 page is used for transport using a trenchless freezing (-18°C) cold storage setting. selection switch 4
6 to the 46b side, disconnect the power cord 47 from the power source, and stop the operation of the compressor 41. Then, it is loaded onto a transport truck or the like and transported to the destination. At this time, the refrigeration (-18°) changeover switch 36a
8 is energized and inside the cold storage main body 23, cool air cooled by the latent heat of fusion of the cold storage agent 28 flows through the ventilation hole 37 into the cold storage chamber 4.
It flows to the 0 side and cools the cold storage chamber 4Q. Thereafter, the cold storage temperature controller main body 34 is repeatedly opened and closed based on the cold storage temperature detection by the cold storage temperature detection section 35, and the ventilation fan 38 is operated and stopped to keep the temperature within the set cold storage temperature range, thereby transporting the goods 22 in a cold storage state.

Also, a case will be explained in which it is used for cold storage transportation with a cold storage setting (0° C., 5° C.). Refrigerated (0℃.

5℃), the ventilation fan 38 is energized and operated by the SSC, and the cool air cooled by the sensible heat of the cool storage agent flows from the ventilation hole 37 to the cold storage chamber 40 side.
to cool down. Thereafter, the temperature is similarly controlled within the set cold storage temperature range, and the transported goods 22 are transported under cold storage.

As described above, according to this embodiment, the latent heat type cold storage agent 28 having a melting point of about 130"C is installed in the cold storage chamber 27,
A cooler 29 that cools and freezes the cold storage agent 28, a refrigerator unit 43 that forms a refrigeration cycle, and a cold storage temperature that controls the cooling temperature of the cold storage agent 28 to a different temperature higher than the melting point or lower than the melting point. The regulator 44 and the refrigeration in the cold storage room.
By providing a cold storage temperature regulator main body 34 that controls refrigeration at different temperatures and a changeover switch 36 that interlocks the two, the temperature of the cold storage agent 28 to be cooled can be adjusted from the melting point by switching the changeover switch 36. By selecting high cooling or freezing below the melting point and changing the cooling/freezing temperature and heat storage amount of the cold storage agent, the temperature inside the cold storage chamber 24 can be easily changed.

Effects of the Invention As described above, the present invention provides a cold storage chamber for keeping transport items such as food cool, a latent heat type cold storage agent having a melting point of about -30°C installed in the cold storage chamber, and the cold storage agent. A cooler that cools and freezes, a refrigerator unit that forms a refrigeration cycle, a cold storage temperature controller that controls the cooling temperature of the cold storage agent to a different temperature higher than or lower than the melting point, and a cooling/freezing unit in the cold storage room. By providing a cold storage temperature regulator body that controls the temperature of the refrigerator at different temperatures, and a changeover switch that interlocks the two, the temperature of the refrigerant to be cooled can be set to a temperature higher than the melting point by switching the changeover push switch. Alternatively, by selecting freezing lower than the melting point, the cooling/freezing temperature of the cold storage agent and the amount of heat storage can be changed, and the temperature in the cold storage chamber can be easily changed.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing the structure of a cold storage type cold storage box according to an embodiment of the present invention, Fig. 2 is an electric circuit diagram thereof, Fig. 3 is a temperature characteristic diagram of a cold storage agent in frozen/refrigerated cold storage, and Fig. 4 FIG. 1 is a vertical cross-sectional view showing the structure of a conventional cold storage type refrigerator. 23...Cold box main body, 27...Cold storage chamber,
28...Cold storage agent, 29...Cooler, 34
... Cold storage temperature controller body, 36 ... Changeover switch, 4Q ... Cold storage room, 43 ... Freezer unit.

Claims (1)

[Claims] A refrigeration cycle is formed by a cold storage room for keeping transport items such as food cool, a latent heat type cold storage agent with a melting point of about -30°C installed in the cold storage room, and a cooler that cools and freezes the cold storage agent. A refrigerator unit, a cold storage temperature controller that controls the cooling temperature of the cold storage agent to a different temperature higher than or lower than the melting point, and a cold storage temperature controller main body that controls the cooling temperature of the cold storage room to different temperatures for freezing and refrigeration. , and a changeover switch for interlocking the two.