JPH02302572A - Cooling and storing refrigerator - Google Patents

Abstract

PURPOSE:To reduce an increase in temperature in a storing chamber in case of defrosting operation and further to decrease a temperature variation in the storing chamber during cooling and defrosting operations by a method wherein a cold accumulation material having an aeration structure is arranged at a downstream side of an evaporator within the aeration passage. CONSTITUTION:An evaporator 18 of freezing cycle is arranged at a lower portion of a back part of an aeration passage 9, i.e. a so-called rear plate of a partition plate 8 and a rear surface of an inner casing 2. A cold heat accumulation material 20 having an aeration structure is arranged at a downstream side of an evaporator 18 within the aeration passage 9. A cold heat accumulation in the cold heat accumulation material 20 is carried out during a cooling operation and in case of defrosting operation, the air flowing from the evaporator 18 is cooled with it. Even if a temperature of air flow passing through the evaporator 18 is increased during a defrosting operation, it is cooled with the cold heat accumulation material 20, thereby a temperature increasing of an air curtain flow A is prevented. A reduction in cooling time with a cold air of the cold heat accumulation material 20 and a cooling of aeration air with the cold heat accumulation material 20 during a defrosting operation can be efficiently carried out and then a variation in temperature within the storing chamber of the cooling and storing refrigerator can be restricted.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention obtains cold air by passing the air flow generated by a cold air circulation blower through an evaporator, and supplies the cold air to an air curtain in a storage room or an opening of the storage room. It relates to a cooling storage that blows air so as to form a .

(b) Prior art As a technology prior to the present invention, Utility Model Publication No. 48-34027
There is a cooling storage described in the publication. The cooling storage is divided into a cooler chamber having a cold air circulation fan and a cooler through a partition wall on the wall of an inner box forming a storage chamber, and is compared to the inner box wall surface and the partition wall surface around the cooler chamber. It is equipped with a cold storage material that has a large specific heat at a relatively low temperature.

However, by attaching the cold storage material to the wall of the inner box, the volume of the storage chamber is reduced, and the contact area between the circulating air that rises during defrosting and the cold storage material is small.

Rather than cold air, air with a relatively elevated temperature flows into the storage room, and the temperature inside the storage room increases during defrosting.

(c) Problems to be Solved by the Invention The present invention provides a refrigerated storage in which the temperature rise in the storage room during defrosting is reduced, and temperature fluctuations within the storage room during cooling and defrosting are reduced. is a technical issue.

(d) Means for Solving the Problems The present invention forms a ventilation passage in which an evaporator and a cool air circulation blower are installed inside an insulated box forming a storage room, and vents air in the ventilation passage on the leeward side of the evaporator. This problem is solved by arranging a structural cool storage body.

The insulating box has an opening on at least one wall surface, and the opening may be opened and closed by a door, or may be divided by an air curtain formed by cold air generated by a cold air circulation blower.

(E) Function In the present invention, the air that has passed through the evaporator passes through the cool storage body having a ventilation structure, so that the cool storage body is cooled during the cooling operation, and the air that has passed through the evaporator is cooled during the defrosting operation. It is.

(F) Embodiment FIG. 1 is a longitudinal left side view of an open showcase 1 embodying the present invention, and FIG. 2 is a perspective view of the left side of the open showcase 1 taken longitudinally.

The open showcase 1 has an inner box 2, an outer box 3, and a heat insulating box body 5 in which a heat insulating material 4 is filled between the inner box 2 and the outer box 3. An opening 6 is formed in the front of the heat insulating box 5, and a storage chamber 7 is formed inside the heat insulating box 5.

A partition plate 8 is disposed at a distance from the top, back, and bottom of the inner box 2 of the heat insulating box 5, and a ventilation passage 9 is provided between the partition plate 8 and the inner box 2.
is formed. The partition plate 8 may be formed of a single plate or a plurality of plates. The material of the "partition" is a material with good thermal conductivity, such as a steel plate.The ends of the ventilation passage 9 are open at the upper and lower edges of the opening 6 of the insulation box 5, and the open end of the ventilation passage 9 is Opposing 0 ventilation passage 9
A rectifier 10 for the blown air flow is formed at the upper end, and a suction port 11 is formed at the lower end of the air passage 9. A barrier 12 for guiding the air curtain flow A blown toward the suction port 11 from the flow regulator 10 toward the suction port 11 is formed at the lower edge of the opening 6 of the heat insulating box 5 from a transparent plate.

A back plate portion of the partition plate 8 supports a shelf 13 on which products are placed in the storage chamber 7. The shelf 13 has a structure that can be supported by changing the supporting position as appropriate. The front end of the 1fl1 body 13 is located in the storage chamber 7 where it does not interfere with the air curtain flow A.

A fan case 14 is disposed below the ventilation passage 9, between the so-called bottom plate portion of the partition plate 9 and the bottom surface of the inner box 2, and air blower blades 17 driven by an electric motor 16 are installed in the ventilation opening 15 of the fan case 14. to be placed. The vent 15 also serves as a wind tunnel for the blower blades 17. The fan case 14, the blower blades 17, and the electric motor 16 form a cold air circulation blower.

An evaporator 18 of the refrigeration cycle is disposed at the back of the ventilation path 9, so-called at the bottom of the back plate of the partition plate 9 and the back of the inner box 2. The air blown toward the evaporator 18 by the blower blade 17 is cooled while passing through the evaporator 18, and is blown out from the flow regulator 10 toward the suction port 11.The condenser, compressor, etc. of the refrigeration cycle are insulated. It is arranged outside the box body 5.

The stopping and controlling of the refrigeration cycle is performed based on the detected value of the temperature in the storage chamber 7 so that the temperature in the storage chamber 7 reaches the set temperature in comparison with the set value.

The defrosting operation of the evaporator 18 is performed by detecting the temperature of the evaporator 18 and controlling the time (for example, cooling for 3 hours and defrosting for 30 minutes repeatedly). The defrosting means for the evaporator 18 may be defrosting using hot gas such as a bypass of the refrigerant circuit of the refrigeration cycle or a reverse cycle.
A defrosting tank 19 may be provided on the windward side of the defrosting tank.

A cool storage body 20 having a ventilation structure is disposed on the leeward side of the ventilation path 9 from the evaporator 18. The cold storage body 2o is attached to the ventilation path 9 by any suitable means known in the art. Cold storage in the cold storage body 20 is performed during the cooling operation, and during the defrosting operation, the air flowing from the evaporator 18 is cooled. Even if the temperature of the airflow passing through the evaporator 18 rises during the defrosting operation, the temperature of the air curtain flow A is prevented from rising by being cooled by the cool storage body 20. Cold storage body 2o
The amount of cool storage may be any amount that can suppress the temperature rise during defrosting.

The cold storage body 20 has a first structure shown in FIGS. 3 and 4, a second structure shown in FIGS. 5 and 6, a third structure shown in FIG. 7,
It can be implemented with any suitable structure such as the fourth structure shown in FIGS. 8 and 9. The cold storage body 20 includes a cold storage agent container 21 and a cold storage agent container 2.
1 and a cold storage agent 22 enclosed within the container. The cool storage agent 22 is formed from a gel such as potassium chloride, or a liquid such as saline, ethylene glycol, propylene glycol, etc. The cool storage agent container 21 is optimally made of a material with good thermal conductivity, but may also be made of synthetic resin.The inner box 2 and the partition plate 8 forming the ventilation passage 9
The cool storage agent container 21 is mounted and fixed on the support metal fitting 24 formed in the shape of the support metal fitting 24 using screws or the like.

The ventilation part 23 formed in the cool storage agent container 21 is the third I2I
It may be a round hole as shown in the first structure in Figure 4, a ribbed hole as in the second structure in Figures 5 and 6, or a square hole as in the third structure in Figure 7. Good, also cold storage container 2
The external shape of the structure 1 may be substantially barrel-shaped as in the fourth structure shown in FIGS. 8 and 9.

By arranging the cold storage body 20 as a ventilation structure in the ventilation path,
For the refrigerated and frozen specifications of open showcase 1,
This can be suitably adapted by changing the amount of cool storage in the cool storage body 20 without changing the heat insulating box 5. Cold storage body 20
To change the amount of cold storage, use cold storage agent 2 with a different freezing point (freezing point).
2 into the cool storage container 21 or the cold storage body 20
This can be done by changing the volume of

(G) Effects of the Invention The present invention provides a regenerator with a ventilated structure on the leeward side of the evaporator in the ventilation path, thereby shortening the cooling time of the regenerator with cold air and reducing the ventilation caused by the regenerator during defrosting. Cooling can be performed efficiently and temperature changes within the storage chamber of the cooling storage can be suppressed.

[Brief explanation of the drawing]

The figures show the present invention; FIG. 1 is a vertical left side view, FIG. 2 is a vertical perspective view, FIG. 3 is a perspective view of the first structure of the cool storage body, FIG. 4 is a sectional view of the same, and FIG. 5 is a cold storage body. 6 is a cross-sectional view of the ventilation portion of the body, FIG. 7 is a perspective view of the third structure of the cool storage body, FIG. 8 is a perspective view of the fourth structure of the cool storage body, and FIG. 9 is a perspective view of the fourth structure of the cool storage body. It is the same sectional view. 1...Open showcase (cooling storage), 5...
・Insulation box body, 8... Partition plate, 9... Ventilation path, 14.
...Fan case, 15...Vent, 16...Electric motor, 17...Blower blade, 18...Evaporator, 20...
・Cold storage body.

Claims (1)

[Claims] 1. Cooling by forming a ventilation passage containing an evaporator and a cold air circulation blower inside the insulated box that forms the storage room, and arranging a cold storage body with a ventilation structure in the ventilation passage on the leeward side of the evaporator. storage.