JPH02143074A - Cold heat accumulating type cold reserving case - Google Patents

Abstract

PURPOSE:To facilitate the switching of a temperature in a cold reserving chamber by a method wherein the title cold reserving case is provided with a cold heat accumulating temperature regulator, controlling two different temperatures, a cold reserving temperature regulator, controlling different refrigerating temperature and cold storage temperature, and a changeover switch, operating both of the regulators in conjunction with each other. CONSTITUTION:The title case is provided with a cold storage pack 28a, accommodating cold heat accumulating agent 32a for cold storage, and a refrigerating pack 28b accommodating cold heat accumulating agent 32b for refrigerating. The case is also provided with a cooler 29 for cooling and freezing the packs 28a, 28b and a refrigerating machine unit 43 forming a refrigerating cycle. A cold heat accumulating temperature regurator 45, controlling a temperature so as to be lower than the freezing point of the cold heat accumulating agent 32b under the setting of refrigeration but controlling the temperature so as to be higher than the freezing point of the cold heat accumulating agent 32b and lower than the freezing point of the cold heat accumulating agent 32a under the setting of cold storage, a cold reserving temperature regulator 35, controlling a cold reserving chamber 40 at refrigerating or cold storage temperature, and a changeover switch 37, operating both of regulators 45, 35 in conjunction with each other, are also provided in the title case. According to this method, the cooling or freezing temperature and the amount of accumulating heat of the cold heat accumulating agent can be changed whereby a temperature in the cold reserving chamber 40 may be switched easily.

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.

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 5 denotes a cold storage chamber, which is composed of a latent heat type cold storage agent 6 having a melting point approximately 10° C. lower than the set internal temperature of the cold storage, and a cooler 7 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. 10 is a heat insulating partition wall having heat insulating properties, 11 is a ventilation hole provided at two places in the heat insulation partition wall 10, and 12 is a heat insulation partition wall 1o installed in the vicinity of one of the ventilation holes 11. Chill with ventilation fan. Reference numeral 13 denotes a cold storage room, which is partitioned by the heat insulating partition wall 1o 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 16 is attached to the inner wall surface of the cold storage chamber 13. 1θ is a compressor installed outside the lower wall of the cold storage chamber 13. Reference numeral 17 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 16, a condenser 17, and a capillary tube (not shown) are connected in series to form a refrigerator unit 18, which is connected to a cooler 7 in a cold storage chamber 6 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 the 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 unit 20 reaches a predetermined temperature lower than the freezing temperature, the cold storage temperature detector 19 is activated. Then, the operation of the compressor 16 is stopped. Thereafter, the compressor 16 is repeatedly operated and stopped, and the freezing temperature of the refrigerant e is controlled within a certain temperature range so that the temperature of the refrigerant 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 from 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 foods brought from the production area, are placed in the cold storage room 13, the power cord 21 is disconnected from the power source, 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 main body 1 is cooled by the cold storage chamber 6 which 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 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 However, with the above configuration, there is no function to switch the temperature inside the cold storage main body 1 to freezing or refrigeration during cold storage transportation, and the cold storage temperature for freezing or refrigeration depends on the freezing point of the selected cold storage agent. The problem was that it could only be used

In view of the above-mentioned problems, the present invention provides a cold storage type refrigerator having a cooling capacity variable mechanism capable of switching between different cold storage temperatures for freezing and refrigeration.

Means for Solving the Problems In order to solve the above problems, the cold storage type cold storage box of the present invention comprises latent heat type cold storage agents having different melting temperatures arranged at a certain ratio in the cold storage chamber, and the cold storage agent. A cooler that cools and freezes, a refrigerator unit that forms a complete refrigeration cycle, a cold storage temperature regulator that controls the temperature of the cold storage agent to two different temperatures, and a cold storage temperature that controls the cold storage room to different temperatures for freezing and refrigerating. It is equipped with a controller main body and a changeover switch that interlocks the two, and is configured to change the temperature in the cold storage chamber by changing the cooling/freezing temperature and heat storage amount of the cold storage agent cooled during cold storage operation using the changeover switch. It is something that

Effects According to the present invention, with the above-described configuration, when the set temperature of the cold storage chamber is high for refrigerated cold storage, only the cold storage agent for refrigeration with a higher melting temperature is frozen, thereby making it possible to set the temperature of the cold storage chamber to refrigeration. In addition, when setting the temperature of the cold storage room to freezing, the cooling capacity during frozen cold storage can be increased by freezing both the cold storage agent for freezing, which has a low melting temperature, and the cold storage agent for refrigeration, which has a high melting temperature. You can set the room temperature to freezing,
It is possible to simply switch the cold storage temperature between refrigeration and freezing by simply selecting a 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.
and a Gunnut cut 26 for sealing. A cold storage chamber 27 is formed on the top of the cold storage main body 23 and is composed of an ice pack 28 and a cooler 29 for cooling and freezing the ice pack 28. 30 is an air supply fan, and 31 is a defrosting heater, which is built in the cooler 29. The ice pack 28 is a refrigerating ice pack 2.
8a and the freezing ice pack 28b, the latent heat type cold storage agents 32a and -27 for refrigeration each have a high melting point of -10°C or less, so that the melting point is about 10 degrees lower than the cold storage set temperature. A latent heat type cold storage agent 32b for freezing having a low melting point of 0.degree. C. or lower is built-in.

33 is a heat insulating partition wall having heat insulating properties, 34 is an intake hole provided at one end of the heat insulating partition wall 32, 35 is a main body of a cold storage temperature controller, and a cold storage temperature detection unit 36 is provided near the intake hole 34. is installed. 37 is cold #-1 with a changeover switch
Three temperatures can be selected: 8°C 37a, refrigerated Q°C 37b, and refrigerated 5°C 37c.

Reference numeral 38 indicates a ventilation hole disposed at the opposite end of the intake hole 34, and reference numeral 39 indicates a ventilation fan installed near the ventilation hole 38. Reference numeral 40 is a driving element (battery) that operates the ventilation fan 38 by the cooling temperature controller main body 35.
It's stopped. Reference numeral 41 denotes a cold storage room, which is divided into multiple sections by the new edition partition wall 32 and is formed at the lower part of the cold storage main body 23. 4
A compressor 2 is installed outside the lower insulation wall of the cold storage chamber 41. Reference numeral 43 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 41 of the cold storage main body 23. A compressor 42, a condenser 43, and a capillary tube (not shown) are connected in series to form a refrigerator unit 44, which is connected to a cooler 29 in a cold storage chamber 27 to form a refrigeration cycle. 45 is a cold storage temperature control that controls two types of freezing temperatures: 45a, which is lower than the melting point of the cold storage agent for freezing, and 45b, which is lower than the melting point of the cold storage agent and higher than the melting point of the cold storage agent. A cold storage temperature detection section 46 is attached to the upper surface of the heat insulating partition wall 33 in the main body of the container. 47 is a cold storage → cold preservation selection switch, and 48 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, for cold storage operation with freezing (-18° C.) cold storage setting, the power cord 48 is plugged into the power source and the selection switch 47 is used to energize 47a to operate the compressor 42 to perform the cold storage operation. Then, the ice pack 28 is cooled by the cooled cooler 29, and the refrigerating ice pack 28a and the freezing ice pack 2sb are completely cooled and solidified, and the temperature of the cold storage temperature detection unit 46 is set to the temperature of the latent heat type cold storage agent 32b for freezing. When the temperature reaches a predetermined temperature (point A in FIG. 3) lower than the temperature, the cold storage temperature controller 4
5a is activated and the operation of the compressor 42 is stopped. Thereafter, the compressor 42 is repeatedly operated and stopped, and the freezing temperature of the ice pack 28 is controlled within a certain temperature range so that the temperature of the ice pack 28 does not rise or fall too much.

Also, the cold storage setting (0°C, 5°C) will be explained. The selector switch 37 energizes 37b or 37c, and the selection switch 47 energizes 47a to operate the compressor 42 and perform cold storage operation. Then, the ice pack 28 is cooled by the cooler 29, and only the ice pack 28a for refrigeration is completely solidified, so that the temperature of the cold storage temperature detection part 46 is lower than the melting point of the latent heat type cold storage agent 32b for refrigeration. When the temperature reaches a certain point (point B in Figure 3) higher than the melting point of
The cool storage temperature controller 4tsb is activated, repeats the operation and stop of the compressor 42, and similarly controls the cooling and freezing temperature of the ice pack 28 within a predetermined temperature range.

Next, first, a case will be described in which it is used for cold storage transportation with a frozen (-18° C.) cold storage setting. Select switch 47
Switch to side b, disconnect the power cord from the power source, and stop the operation of the compressor 42. Then, it is loaded onto a transport truck or the like and transported to the destination. At this time, frozen (-18
℃), the ventilation fan 39 is energized and operated by the changeover switch 37a, and the latent heat type cold storage agent 32 for refrigeration is heated inside the refrigerator main body 23.
The cold air cooled by the latent heat of fusion of the latent heat storage agent 32b and the latent heat storage agent 32b flows toward the cold storage chamber 41 through the ventilation hole 38 and cools the cold storage chamber 41. Thereafter, the cold storage temperature controller main body 35 is repeatedly opened and closed based on the cold storage temperature detection by the cold storage temperature detection section 36, and the ventilation fan 39 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.

In addition, a case where it is used for cold storage transportation with a cold storage setting (o° C., s° C.) will be explained. Refrigerated (0℃.

The ventilation fan 39 is energized by the changeover switches 37b and 37c (5°C), and cold air cooled mainly by the heat of the molten layer of the latent heat type cold storage agent for refrigeration is sent from the ventilation hole 38 to the cold storage room 41.
It flows to the side and cools the cold storage chamber 41. Thereafter, the temperature is similarly controlled within the set cold storage temperature range, and the goods 22 to be transported are transported under cold storage.

As described above, according to the present embodiment, the refrigerating ice pack 2 containing the refrigerating latent heat type refrigerating agent 32a installed in the refrigerating chamber
8a and a latent heat type cold storage agent 32b for freezing, a cooler 29 that cools and freezes the Ai-Ainu pack 28a28b, a refrigerator unit 43 that forms a refrigeration cycle, and a freezing ice pack that has a latent heat type cold storage agent 32b for freezing. Cold storage agent 3
A cold storage temperature controller 45 that freezes the cold storage chamber 40 to a temperature lower than the freezing point of the cold storage agent 32b and lower than the freezing point of the cold storage agent 32b and lower than the n point of the cold storage agent 32a in the refrigerated cold storage setting. By providing a cold storage temperature regulator body 36 that controls different temperatures for refrigeration and a changeover switch 36 that interlocks the two 46.36, the cooling/freezing temperature and storage temperature of the cold storage agent to be cooled can be changed by switching the changeover switch 37. By changing pB, the temperature inside the cold storage chamber 40 can be easily changed.

Effects of the Invention As described above, the present invention provides an ice punch for freezing and a refrigerated ice pack, each of which has a cold storage chamber for keeping transported goods such as food cool, and a latent heat type cold storage agent having a different melting temperature installed in the cold storage chamber. , a cooler that cools and freezes the IJ E Ice Punk, a refrigerator unit that forms a refrigeration cycle, a cold storage temperature controller that controls If7J Aino Ainu Pack at two different temperatures, and a cold storage room that can be used for freezing and refrigerating. By providing a cold storage temperature controller body that controls different temperatures and a changeover switch that links the two, cold storage can be achieved by changing the cooling/freezing temperature and heat storage amount of the cold storage agent to be cooled by changing the changeover switch. You can easily change the indoor temperature.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal 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 the cold storage agent during freezing and refrigeration, 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, 28a...Ice pack for freezing, 28b...
... Ice pack for refrigeration, 29 ... Cooler, 32 & ... Latent heat type cold storage agent for refrigeration, 32b ...
... Latent heat storage agent for refrigeration, 36 ... Cold storage temperature controller body, 37 ... Changeover switch, 40 ...
...Cold storage room, 43... Refrigerator unit, 4
6... Cold storage temperature control 1g device. Name of agent: Patent attorney Shigetaka Awano and one other person Figure 7b

Claims (2)

[Claims] (1) A cold storage room for keeping transported items such as food cool; a freezing ice pack and a refrigerated ice pack each containing a latent heat type cold storage agent with a different melting temperature installed in the cold storage room; and cooling the ice pack. A cooler that freezes, a refrigerator unit that forms a freezing cycle, a cold storage temperature controller that controls the temperature of the ice pack to two different temperatures, and a cold storage temperature controller that controls the cold storage room to different temperatures for freezing and refrigeration. A cold storage type refrigerator comprising a container body and a changeover switch for interlocking the two. (2) The melting temperature of the freezing and refrigerating cold storage agents should be set below the freezing and refrigerating cold storage setting temperatures, respectively, and the setting temperature of the cold storage temperature controller should be set to be lower than the freezing point of the freezing cold storage agent when the freezing and cold storage settings are set. The cold storage type cold storage box according to claim 1, wherein the freezing point is set higher than the freezing point of the cold storage agent for freezing and lower than the freezing point of the cold storage agent for refrigeration.