JPH02251076A - Cold heat accumulating type cold storage chamber - Google Patents

Abstract

PURPOSE:To permit the storage of transporting articles in a cold storage chamber even during cold heat accumulating operation by a method wherein at least one set of a ventilating fan is operated in conjunction with a cold storage chamber temperature detector during the cold heat accumulating operation to control the amount of cold air invading into the cold storage chamber. CONSTITUTION:Cold heat accumulating operation is effected by operating a compressor 40. When cold heat accumulating agent 28 is cooled and solidified perfectly by a cooler 29 and the temperature of a cold heat accumulating temperature detector 44 gives a predetermined temperature, lower than a freezing temperature, a cold heat accumulating temperature detector 43 is operated and the operation of the compressor 40 is stopped. In this case, the inside of a cold storage chamber 36 is not cooled to a cold storage temperature and, therefore, the b-contact of a cold storage chamber temperature detector 39 is in a conducted condition and both of ventilating fans 30, 31 are operated to ventilate air. When the inside of the cold storage chamber 36 is cooled to the cold storage temperature, the b-contact of the cold storage chamber temperature detector 30 is released from the conducted condition thereof and, therefore, only the ventilating fan 31 is operated. The temperature in the cold storage chamber 36 is controlled at a set temperature by repeating above-described operation during cold heat accumulating operation whereby the temperature of transporting articles 48, carried into the cold storage chamber 36, may be controlled at a temperature within the range of set temperatures.

Description

[Detailed description of the invention] Industrial field of application 2 pages The present invention performs a cold storage operation in a cold storage in parallel with the cold storage operation of a cold storage agent, and stores products that require refrigeration or freezing such as fresh foods and medicines. This relates to a cold storage type refrigerator that can be used for the transportation of food and other equipment, and can also be used for cold storage at bases, etc.

BACKGROUND OF THE INVENTION In recent years, in addition to conventional refrigerator-freezer trucks, small-sized cold storage refrigerators have been used in the distribution of fresh foods.

An example of the above-mentioned conventional cold storage type refrigerator 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 8, and a gasket 4 for sealing the door 3 and the cabinet 2.

Reference numeral 5 denotes a cold storage room, which is composed of a latent heat type cold storage agent 6 having a melting point approximately 15° C. lower than the set temperature of the cold storage room, and a cooler 7 that cools and solidifies the cold storage agent 6, and is located on the ceiling of the cold storage main body 1. is formed. Reference numeral 8 denotes a three-page fan, and reference numeral 9 denotes a defrosting heater, which is built into the cooler 7. 10 is a heat insulating compartment wall having heat insulating properties;
Reference numeral 1 denotes ventilation holes provided at two locations in the heat-insulating partition wall 10;
Reference numeral 12 denotes a ventilation fan installed in the heat insulating partition wall 10 near the ventilation hole 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 body, which has a cold storage temperature detection section 15 attached to the inner wall surface of the cold storage chamber 13 and controls the ventilation fan 12 . 16 is the compressor and cold storage chamber 1
It is attached outside the outer peripheral surface of the lower insulation wall of 8. Reference numeral 17 denotes a condenser, which is built into the outer peripheral surface of the heat insulating wall of the cold storage main body 1 except for 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 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 unit 20 attached to the upper surface of the insulation compartment wall 10. 21 is a power cord. The operation of the conventional cold storage type refrigerator constructed as described above will be explained below with reference to FIG. 4.

First, in the cold storage operation, the power cord 21 is plugged into the power source, and the refrigeration cycle is operated to perform the cold storage operation of the cold storage agent 6. 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 humidity detection unit 20 reaches a predetermined temperature lower than the freezing temperature, the cold storage temperature detector 19 is activated. , the compressor 16 is repeatedly operated and stopped, and the humidity of the cool storage agent 6 is controlled within a certain temperature range so that the humidity 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 battery power source (not shown). Then, the cold air cooled by the cold storage agent 6 flows through the ventilation holes 11 to the cold storage chamber 13 side, thereby cooling the cold storage chamber 13. Then, after putting the cooled transport goods 22 such as fresh foods brought from production areas into the cold storage room 13,
Unplug the power cord 21 from the power source and connect the compressor 1.
Stop page 5 of operation 6. Then, it is loaded onto a transport truck 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, thereby preventing the temperature of the transported goods 22 from rising. At this time, the compressor 16 is stopped and high-temperature refrigerant is not flowing into the condenser 17, so there is no heat effect on the inside of the cold storage main body 1. In addition to cooling, the inside of the refrigerator body 1 is also cooled, and the temperature inside the refrigerator is 0.
℃ or below, the refrigerated items to be transported may freeze, and the temperature inside the refrigerator may not be constant due to fluctuations in outside air noise, making it impossible to keep the items cold before and after transportation at bases, etc.

The present invention solves this problem. By controlling the amount of cold air into the cold storage chamber during cold storage operation of cold storage agents at bases, etc., and maintaining the temperature inside the cold storage chamber at a set temperature, it is possible to store refrigerated and frozen cold storage, and transport it. It is possible to provide a highly economical cold storage type refrigerator that can be used for equipment as well as storage.

Means for Solving Problem W In order to solve the above problems, the cold storage type cold storage box of the present invention includes a cold storage chamber for keeping transport items such as food cool, a cold storage room temperature sensor installed in the cold storage chamber, and a cold storage type cold storage box. a cold storage room humidity detector installed in the cold storage room, at least two or more air supply fans, a cooler for cooling the inside of the cold storage room, a cold air inlet and a cold air inlet for dividing the cold storage room and the cold storage room. A cold storage main body comprising a heat insulating partition wall having a discharge port, the cold storage chamber, and the cold storage chamber, and controlling the blowing of cold air to the cold storage chamber in conjunction with the cold storage room temperature sensor during the cold storage operation of the cold storage chamber. The refrigerator is equipped with a ventilation fan, a battery that serves as a power source for the ventilation fan, and a refrigerator unit installed outside the refrigerator main body.

Function: With the above-described configuration, the present invention is able to store cold in the cold storage agent and maintain the set temperature in the cold storage chamber even when the cold storage chamber is in cold storage operation. This eliminates the need to purchase, maintain, and manage cold storage, making effective use of the installation storage space within the base, and reducing the amount of work required to bring in and out of transported items from transportation to the base (cold storage). It is possible to ensure quality through product maintenance.

EXAMPLE An example of the present invention will be described below with reference to FIG.

In the figure, reference numeral 23 denotes a cold storage box body, which is composed of a cabinet 24 containing a heat insulating material, a door 25, and a gasket 26 that seals the door 25 and the cabinet 24 together. 27 is a cold storage room, which is 15℃ higher than the set internal temperature of the cold storage room.
It is composed of a latent heat type cold storage agent 28 having a relatively low freezing point and a cooler 29 that cools and solidifies the cold storage agent 28, and is installed on the ceiling of the cold storage main body 28. Reference numerals 30 and 31 denote an air supply fan, and 32 a defrosting heater, which is built into the cooler 29. 88 is a heat insulating partition wall having heat insulating properties, 34 is a cold air inlet provided at one end of the heat insulating partition wall 33, and 35 is a cold air discharge port provided at the other end opposite to the cold air inlet 84. be.

Reference numeral 36 denotes a cold storage room, which is formed in the lower part of the cold storage main body 23 partitioned by the heat insulating partition wall 33.

Reference numeral 37.3B denotes a ventilation fan, which is disposed at the opposite end of the ventilation fans 30 and 31. 39 is a cold storage room temperature sensor that controls the temperature of the cold storage room 36. 40 is a compressor, which is installed outside the insulation wall below the cold storage room 36.

41 is a condenser, which is built into the outer peripheral surface of the heat insulating wall of the cold storage main body 23.

A compressor 40, a condenser 41, and a capillary tube (not shown) are connected in series to create a refrigerator unit 4.
2 and is connected to the cooler 29 of the cold storage chamber 27 to form a refrigeration cycle. Reference numeral 48 denotes a cold storage temperature detector that detects cold storage and controls the freezing temperature of the cold storage agent 28, and a temperature sensing portion 44 is attached to the surface of the cold storage agent 28. 45 is a power cord.

The electrical wiring diagram is as shown in Figure 2.
8 and the a contact point of the cold storage room temperature sensor 89 are directly connected to the 9 page column and connected to the battery 46. In addition, the air supply fan 31 and the compressor 40 are connected to a cold storage temperature detector 43.
The air supply fan 30 further connects the cooling temperature sensor 39 to
It is connected to a commercial power source 47 via a contact.

Regarding the cold storage type refrigerator configured as above, the following is the first part.
The operation will be explained using FIG.

First, the cold storage operation is performed by inserting the power cord 45 into the power source 47 and operating the compressor 40. Then, the cold storage agent 28 is cooled by the cooled cooler 29, and the cold storage agent 28 is cooled.
8 is completely cooled and solidified and the temperature of the cold storage temperature detector 44 reaches a predetermined temperature lower than the freezing temperature, the cold storage temperature detector 43 is activated and the operation of the compressor 40 is stopped.

Thereafter, the compressor 40 is repeatedly stopped and operated, and the freezing temperature of the cool storage agent 28 is controlled within a certain temperature range so that the temperature of the cool storage agent 28 does not rise or fall.

At this time, since the inside of the cold storage chamber 86 has not been cooled to the cold storage temperature, the B contact of the cold storage chamber temperature detector 89 is in a energized state, and both of the air blowing fans 30 and 31 are operating to blow air. Therefore, both the positive pressure near the cold air intake port 84 on the upstream side of the air supply fan 80 and 81 and the negative pressure near the cold air discharge port 35 become large, and the cold storage chamber 2 in the cold storage chamber 36 increases.
Since a portion of the cold air enters from inside the cold storage chamber 36 through the cold air discharge port 35, the inside of the cold storage chamber 36 is cooled. Further, when the inside of the cold storage chamber 36 is cooled to the cold storage temperature, the b contact of the cold storage room temperature detector 39 is no longer in the energized state, so that only the air supply fan 31 is in the operating state. Therefore, the positive pressure near the cold air intake port 34 and the negative pressure near the cold air discharge port 35 become small, so that cold air does not enter the cold storage chamber 86. By repeating this during the cold storage operation, the inside of the cold storage chamber 36 is controlled to the set temperature, and the transported goods 48 carried into the cold storage chamber 36 are controlled within the set temperature range.

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

The power cord 45 is disconnected from the power source 47 and the operation of the compressor 40 is stopped. Then, it is loaded onto a transport truck and transported to the destination. At this time, the cold air captured by the latent heat of melting of the cold storage agent 28 is transferred to the battery 4 in the cold storage chamber 36.
The transported goods 48 are cooled by air blowing by the ventilation fans 11 and 37 and 38, which are operated by the ventilation fans 6 and 6, to maintain the cool temperature of the transported goods 48.

As described above, according to this embodiment, during the cold storage operation of the cold storage agent 28, if the temperature inside the cold storage chamber 36 is higher than the set temperature, the two air supply fans 30 and 31 are operated to keep the cold air cold. When the temperature inside the cold storage chamber 36 reaches the set temperature, the air supply fan 31 is in continuous operation, and only the air supply fan 30 is turned on and off by the cold storage temperature detector 39, and the cold storage chamber 36 is cooled. By controlling the amount of cold air entering into the cold storage chamber 36, the temperature inside the cold storage chamber 36 is maintained at a set value. During the cold storage operation in which the cold storage agent is frozen and solidified, at least one of the air supply fans works in conjunction with the cold storage room temperature sensor to control the amount of cold air that enters the cold storage room, thereby keeping the temperature inside the cold storage room at a predetermined temperature. Since the transported goods 48 can be stored in the cold storage room even during the cold storage operation. Therefore, compared to the conventional method of having separate cold storage, the purchase and maintenance of cold storage is no longer necessary, and the installation and retention space within the base is significantly reduced, allowing for effective use of space. I can figure it out. Further, it is possible to reduce the work of carrying in and out the transported goods 48 from transportation to the base (cold storage), and to maintain quality by maintaining the product temperature accordingly.

Effects of the Invention The present invention provides a cold storage room for keeping transport items such as food cool, a cold storage room temperature detector installed in the cold storage room, a cold storage room, and a cold storage room temperature sensor installed in the cold storage room. a plurality of air supply fans, at least one of which is interlocked with the cold storage room temperature detector and the cold storage room temperature sensor; a cooler that cools the inside of the cold storage room; and a cooler that partitions the cold storage room and the cold storage room and sucks cold air A cold storage main body comprising a heat insulating partition wall having an opening and a cold air discharge port, a cold storage chamber, and a cold storage chamber; Since the configuration includes a ventilation fan that controls air blowing, a battery that serves as a power source for the ventilation fan, and a refrigerator unit that is installed outside the refrigerator main body, the air blowing is performed during the cold storage operation in which the cold storage agent is frozen and solidified. At least one of the fans works in conjunction with the cold storage room temperature sensor on page 13 to control the amount of cold air that enters the cold storage room.This allows the temperature inside the cold storage room to be maintained at a predetermined temperature, so it is transported to the cold storage room even during cold storage operation. Items can be stored. Therefore, compared to the conventional method of having separate cold storage, the purchase and maintenance of cold storage is no longer necessary, and the installation and retention space within the base is significantly reduced, allowing for effective use of space. I can figure it out. In addition, it is possible to realize an excellent, highly economical cold storage type refrigerator that can reduce the loading and unloading work of transported goods from transportation to the base (cold storage) and ensure quality by maintaining product temperature accordingly.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a cold storage type refrigerator according to an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an electrical wiring diagram thereof, and Fig. 4 is a sectional view of a conventional cold storage type refrigerator. be. 23...Cold box main body, 27...Cool storage chamber, 29...
Cooler, 30...Air supply fan, 33...Insulating partition wall, 86...Cool room 87...Ventilation fan, 39...Cool room temperature detector, 414 page 2... Refrigerator unit , 43... Cold storage room temperature detector.

Claims (1)

[Claims] a cold storage room for keeping transport items such as food cool; a cold storage room temperature sensor installed in the cold storage room; a cold storage room; a cold storage room temperature sensor installed in the cold storage room; A plurality of air supply fans that operate in conjunction with a cold storage room temperature detector and a cold storage room temperature sensor, a cooler that cools the inside of the cold storage room, and a cold air intake port and a cold air discharge port that partition the cold storage room and the cold storage room. a cold storage main body constituted by a heat insulating partition wall, a cold storage chamber, and a cold storage chamber, and a ventilation fan that operates in conjunction with the cold storage room temperature sensor to control the blowing of cold air to the cold storage room during cold storage operation of the cold storage room. A cold storage type refrigerator comprising: a battery that serves as a power source for the ventilation fan; and a refrigerator unit installed outside the refrigerator main body.