JPH0933154A - System for chilling low temperature storehouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for chilling a low temperature storehouse, in which the deterioration of the stored goods is prevented by avoiding the high humidity caused by residing cold air at a lower part inside the storehouse, preventing the growth of mold and realizing an environment suitable for storing goods in good quality, and the space inside the storehouse is utilized effectively, the electric power consumption is saved and installing space is minimized. SOLUTION: In the system for chilling the low temperature storehouse, of which chiller unit that conditions the air inside the storehouse and air blowing means are arranged at a ceiling part, a chilling unit 7 arranged at the ceiling part has a cooling coil and a heating coil therein and provided with the means for adjusting the flow of hot liquid refrigerant to the heating coil. It comprises a blower 14A for a high speed nozzle that inhales cool air at the lower part inside the storehouse, a high speed nozzle 15, that is in the space between the thermally insulated body 1 and a rack 5 and connected to the blower 14 of the high speed nozzle, blows the cool air along the surface of the wall of the thermally insulated body 1 upwards, a blower 14B for the high speed nozzle that blows the conditioned air from the chilling unit 7 into the inside of the storehouse and a high speed nozzle 16 that blows the conditioned air horizontally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a low temperature storage, and particularly to a low temperature which contributes to a low price and running cost while realizing an optimal internal environment for high quality storage of grains, for example. The present invention relates to a storage cooling device.

[0002]

2. Description of the Related Art In recent years, as a storage for storing grains such as rice, a low-temperature storage having a cooling device for maintaining high quality of the stored grains has been widely used. The cooling device for the low-temperature storage of cereals, in order to increase the amount of storage in the refrigerator, cools the air inside the refrigerator by providing a ceiling-mounted cooler near the ceiling inside the refrigerator.
Many keep the inside of the warehouse at an appropriate grain storage temperature. Generally, a proper grain storage temperature is about 15 ° C. and a humidity is 70 to 75%.

An example of a conventional low temperature storage will be described with reference to FIG. FIG. 7: is a longitudinal cross-sectional view which shows an example of the conventional grain low temperature storage. In FIG. 7, 1 is a heat insulating skeleton forming a storage, 2 is a ceiling-mounted cooler with a built-in cooling coil and blower, and this cooler 2 works in conjunction with a refrigerator 3 installed outdoors. To circulate and cool the air in the refrigerator.
Reference numeral 4 denotes a blow-out duct that uniformly supplies the conditioned air cooled by the cooler 2 to the entire inside of the refrigerator, and is directly connected to the blow-out side of the cooler 2. Reference numeral 5 denotes a load carrier that protects the heat insulating skeleton 1, and 6 denotes an item stored in the storage.

[0004]

In the circulation of the air in the conventional low temperature storage of grains shown in FIG. 7, conditioned air is sent from the blow-out duct 4 near the ceiling to cool the stored items 6 in the storage. Then, the air flow returns to the ceiling-mounted cooler 2. Therefore, depending on the operating state of the cooler 2 (which is affected by changes in the outside air temperature, the amount stored, etc.), cold air stagnates in the lower part of the refrigerator as shown in part C of FIG. This is a cause of deterioration of the quality of grains related to the stored items such as the generation of mold.

Therefore, it is an object of the cooling device for the low temperature storage of grains to solve these problems. Currently, the solution being attempted is to install an electric heater in the cooler inside the refrigerator and operate the electric heater when the cold air stagnates in the lower part of the refrigerator and a high humidity region occurs. Although this method uses the dehumidifying function of No. 1, there is a drawback that the electric power consumption of the electric heater is large and the running cost is increased.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and prevents cold air from accumulating in the lower part of the refrigerator to have high humidity and generation of mold, thereby reducing the quality of stored items. It is an object of the present invention to provide a cooling device for a low-temperature storage that prevents and realizes an environment of high quality storage. Another object of the present invention is to provide a cooling device for a low-temperature storage that can effectively use the inside of the storage and save power and space.

[0007]

In order to achieve the above object, the structure of the first invention relating to the cooling device for the cold storage of the present invention has a refrigerator and a cooler for conditioning the air in the cold storage. In a cooling device for a low-temperature storage in which a blower unit is provided on a ceiling part in a refrigerator, a cooler provided on the ceiling part has a built-in heating coil for circulating a high-temperature liquid refrigerant together with a cooling coil, and to the heating coil. A means for adjusting the flow of the liquid refrigerant is provided, and a blowing means for sucking in cool air in the lower part of the low-temperature storage, and is located in the space region between the low-temperature storage inside the heat insulating frame and the load carrier, A high-speed airflow blowing means, which is connected to the blower means and blows the cool air upward along the wall surface of the heat insulating body, is provided.

In order to achieve the second object,
The structure of the second invention relating to the cooling device for the low-temperature storage of the present invention includes a storage compartmented by a heat insulating skeleton in a building, has a refrigerator, and has a cooler and blower means for conditioning the air in the compartment. In the cooling device for a low temperature grain storage provided in the inner ceiling part, the cooler provided in the ceiling part has a built-in heating coil for circulating a high-temperature liquid refrigerant together with the cooling coil, and the liquid refrigerant to the heating coil. With a means for adjusting the flow of, at least the air blowing means for sucking the cool air in the lower part of the cold storage, the duct connected to the air blowing means to send the cool air to the ceiling part, the air blowing means High-speed airflow blowing means for connecting and blowing cool air upward is housed in a box-shaped circulation wind tunnel and integrated, and this circulation wind tunnel is installed in the space area between the outer wall of the building and the heat insulation frame of the storage. .

More specifically, the refrigerator is installed in the space area between the outer wall of the building and the heat insulation frame of the storage room. Further, the circulation wind tunnel is extended to the ceiling, and the cooling coil and the heating coil are installed. The built-in cooler is housed in the circulation wind tunnel.

The more specific description is as follows. A first aspect of the present invention is a ceiling-hung type cooler in a refrigerator, in which a high-temperature liquid refrigerant heating coil is built in together with a blower and a cooling coil, and the high-temperature liquid refrigerant of a refrigerator is flowed to the heating coil, and heating is performed without using an electric heater. In addition to providing a cooler with a dehumidifying function that effectively functions the dehumidifying function of the cooling coil, a high-speed nozzle that attracts ambient air with a small-diameter high-speed airflow is installed on the lower part of the storage that creates cold air traps and the load. It is provided in the space area of the slide and blows out the airflow upward to eliminate the cold air accumulation and to circulate the cold air in the refrigerator.
In addition, by using a high-speed nozzle in the ceiling part and blowing a horizontal airflow from the nozzle, it is possible to satisfy the cold air circulation with a simple duct having a small diameter.

A second aspect of the present invention is an application of the present invention to a storage provided in a building, in which an upward blowing nozzle, a blower for the nozzle, a small-diameter simple duct, a humidifier, and the like are box-shaped. Incorporating and integrating it into the circulation wind tunnel of the above, the conventional refrigerator was also placed together with the circulation wind tunnel in the space area between the outer wall of the building and the heat insulation frame of the storage (the space created by the size of the pillars of the building). . Here, the former (configuration of the circulation wind tunnel) is an effective measure that contributes to effective utilization of the inside of the storage, and the latter (refrigerator built-in configuration) is also an effective measure that contributes to simplification of snow protection measures for refrigerators in snowy areas.

[0012]

The function of the above technical means is as follows. The ceiling-mounted cooler with dehumidification function allows high-temperature liquid refrigerant (liquid refrigerant on the high-pressure side of the refrigerator) to flow to the heating coil manually or automatically when the humidity inside the storage chamber becomes high, and the amount of heat is increased. Correspondingly, the cooling coil operates to dehumidify the circulating air as well as to cool the inside of the refrigerator to a constant humidity. Further, a plurality of high-speed nozzles, which are provided in the lower portion of the storage and blow out upward airflow, attract air that is likely to cause cold air accumulation in the lower portion of the storage and circulate it to the upper portion of the storage. The horizontal high-speed nozzle provided on the ceiling distributes the cool air cooled by the cooler and the air in the ceiling to the entire surface of the inside of the refrigerator.

According to the present invention, due to the above operation, not only the temperature but also the humidity can be maintained in the optimum state by the cooler with the dehumidifying function in the environment in the storage, and the cool air is conveyed and circulated by the high speed nozzle system in the small diameter duct. To realize environmental conditions for high quality storage. Further, it is possible to contribute to power saving by a cooler that does not require an electric heater, power saving of a blower by a small diameter duct, work saving, and running cost. Furthermore, the configuration of the circulation wind tunnel and the built-in configuration of the refrigerator are
It is also effective in simplifying construction, effectively utilizing space, and improving the appearance of storage.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. [Embodiment 1] An embodiment of the first invention will be described with reference to FIGS. FIG. 1 is a vertical sectional view of a low temperature grain storage container according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a cooler with a dehumidifying function, and FIG. 3 is a perspective view showing a configuration of an upward blowing high-speed nozzle. is there. The solid arrows in the figure show the flow of air during operation. Further, the same reference numerals as those in FIG. 7 indicate the same parts as those of the prior art described above.

In FIG. 1, 1 is a heat insulating skeleton forming a low temperature grain storage (hereinafter simply referred to as storage), and 5 is
Reference numeral 6 indicates a load for protecting the heat insulating skeleton body 1 from stored items and the like, and 6 indicates a stored item in the refrigerator. Reference numeral 3 denotes a refrigerator, which is provided with a refrigeration cycle device such as a compressor, a condenser, a blower (condenser fan), etc., although not shown. Reference numeral 7 is a ceiling-mounted cooler with a dehumidifying function, which is connected to the refrigerator 3 by a refrigerant pipe. Inside the cooler 7, as shown in FIG. 2, a blower 8 (evaporator fan), a cooling coil 9,
Further, the cooling coil 7 has a built-in heating coil 10 through which the high-temperature liquid refrigerant can flow, and the cooling device 7 corresponds to an evaporator forming a refrigeration cycle.

In FIG. 2, reference numeral 11 denotes a refrigerant liquid pipe (11a, 1) connecting a condenser (not shown) of the refrigerator 3 and the cooler 7.
1b is a general term). The heating coil 10 is connected to a refrigerant liquid pipe 11a having an on-off valve 12, and the cooling coil 9 is connected to a refrigerant liquid pipe 11b having an expansion valve 13. When the on-off valve 12 is opened, the high-temperature liquid refrigerant flows through the heating coil 10 and exerts a heating function. After that, the air is cooled and dehumidified by the cooling coil 9 after being decompressed by the cool air in the supercooled refrigerant state through the expansion valve 13. I do.

In FIGS. 1 and 3, 14A is a blower for a high speed nozzle related to a blower for sucking cool air in the lower part of the storage, 17 is a small diameter duct connected to the high speed nozzle blower 14A, and 15 is a small diameter. It is a plurality of upward blowing high-speed nozzles provided in the duct 17. The upward blowing high-speed nozzle 15 is arranged between the load 5 and the heat insulating frame 1, and the small-diameter duct 17 and the upward blowing high-speed nozzle 15 cool the air upward along the wall surface of the heat insulating frame 1 of the storage. It constitutes a high-speed air flow blowing means for blowing air.

In FIG. 1, 14B is a blower which is located on the ceiling and relates to a blower for blowing the conditioned air from the cooler 7 into the room, and 17 is a small diameter duct connected to the high speed nozzle blower 14B. Reference numeral 16 denotes a plurality of horizontal blowing high-speed nozzles provided in the small-diameter duct 17 for high-speed nozzles, which constitutes a high-speed airflow blowing means for blowing conditioned air in the horizontal direction.

The operation of the cooling device for the low temperature grain storage of the present embodiment thus constructed will be described. The cool air in the lower part of the refrigerator is sucked in by the high-speed nozzle blower 14A, and the small-diameter duct 17
By blowing out from a plurality of upward blowing high-speed nozzles 15 provided in the inside, cold air in the lower part of the inside is attracted and circulates along the wall surface of the heat insulating skeleton 1 to the upper part in the inside. The cool air circulated in the upper part of the chamber is dehumidified and cooled appropriately by the heating coil 10 and the cooling coil 9 in the cooler 7 with a ceiling-mounted dehumidifying function, and the conditioned air is the blower 14B for the high-speed nozzle in the ceiling. And is blown out from the horizontal blowing high-speed nozzle 16 to uniformly cool the entire surface of the inside of the refrigerator.

According to the embodiment of the first invention, the following effects can be obtained. (1) By the cooler 7 with a dehumidifying function, not only the temperature in the refrigerator but also the humidity can be controlled, and it is possible to easily realize the selection of the refrigerator environment most suitable for the storage of grains. (2) The cooler 7 with a dehumidifying function saves power because it does not use an electric heater.

(3) By the high-speed blowing-inducing action with a small power, the air circulation in the floor near the floor and the space near the wall can be improved, and the generation of mold and the like caused by cold air traps in the low-rise region can be prevented. Good quality storage and storage is possible. (4) In addition to the ceiling-mounted cooler 7, (4) cooling circulation in the refrigerator includes a high-speed nozzle blower 14A, a small-diameter duct 17, an upward blowing high-speed nozzle 15, and a horizontal blowing high-speed nozzle 16.
Since the apparatus can be downsized by using the small-diameter airflow conveying system consisting of, the inside of the refrigerator can be effectively used, and great effects such as an increase in the amount of stored items can be obtained.

[Embodiment 2] Next, an embodiment of the second invention will be described with reference to FIGS. FIG. 4 is a horizontal sectional view of a low temperature grain storage container according to another embodiment of the present invention, and FIG.
4 is a sectional view taken along the line AA of FIG. 4, and FIG. 6 is a sectional view taken along the line BB of FIG. In the figure, the same reference numerals as those in FIGS. 1 to 3 are equivalent parts (equivalent functional parts) to those of the first embodiment,
The description is omitted.

The embodiment of the second invention is an example in which a low temperature grain storage (hereinafter referred to simply as a storage) is provided in a building. In FIG. 4, 18 indicates the outer wall of the building. Exterior wall 18
Since a space area (more than the size of the pillar of the building) is generated between the space and the heat insulating frame 1 of the storage, the circulation wind tunnel 19 is provided in this space area.

The circulation wind tunnel 19, as shown in FIG. 5, is a high-speed nozzle blower 14 for attracting cool air in the lower part of the storage compartment.
A, a small-diameter duct 17 connected to the high-speed nozzle blower 14A for sending cool air to the ceiling, an upward blowing high-speed nozzle 15 connected to the small-diameter duct 17 and blowing cool air upward, and a humidifier 20. It is a box-shaped one that contains and integrates. On the wall of the heat insulating skeleton 1 in which the circulation wind tunnel 19 is installed, an opening 1a for inducing cold air is provided in the vicinity of the high-speed nozzle blower 14A, and an opening 1b for blowing out air is provided in the upper portion.

In the example shown in FIG. 5, the cool air in the lower part of the compartment is sucked into the circulation wind tunnel 19 by the blower 14A for the high-speed nozzle from the opening 1a of the heat insulating frame 1, and the plurality of upwardly directed downwards provided in the small diameter duct 17 are provided. It is blown out from the blowing high-speed nozzle 15, rises in the circulation wind tunnel 19 along the wall surface of the heat insulating frame 1, and circulates from the opening 1b of the heat insulating frame 1 to the upper part of the inside of the refrigerator. The cool air circulated in the upper part of the compartment is dehumidified and cooled moderately by the cooler 7 with a ceiling-mounted dehumidifying function, and its conditioned air is not shown in FIG. 5, but has been described in the embodiment of FIG. 1 above. like,
It is drawn to the high speed nozzle blower 14B on the ceiling and blown out from the horizontal blowing high speed nozzle 16 to uniformly cool the entire inside of the refrigerator. In addition, when the humidity in the refrigerator is low and it is too dry, it is blown out from the upward blowing high-speed nozzle 15 by the humidifier 20 and rises in the circulation wind tunnel 19 along the wall surface of the heat insulating frame 1. The air can be humidified.

The refrigerator 3 which is conventionally or outdoors installed in the embodiment of FIG. 1 also has a space area between the outer wall 18 of the building and the heat insulating frame 1 of the storage as shown in FIGS. 4 and 6. It may be placed at. At this time, an opening 18a for allowing the refrigerator 3 to suck and exhaust outdoor air is provided on the outer wall 18 near the place where the refrigerator 3 is installed. This way,
It is effective for snow protection of refrigerators in snowy areas.

According to the embodiment of the second invention, the same effect as that of the embodiment of the first invention can be expected, and the effective utilization of the inside of the refrigerator is expanded and the appearance of the inside and outside is improved. ,
It is possible to contribute to measures against snowfall in outdoor units (refrigerators) and to save work by unitizing the equipment.

Although not particularly shown, it is possible to extend the circulation wind tunnel 19 to the ceiling portion and store the cooler 7 with a dehumidifying function in the circulation wind tunnel. Although not particularly shown, it is also possible to extend the small-diameter duct 17 in the circulation wind tunnel 19 and connect it to the horizontal blowing high-speed nozzle 16 at the ceiling portion. Although each of the above embodiments has described the cooling device for the low-temperature storage of cereals as a suitable example, it goes without saying that the present invention can be applied to the storage of other stored items that require a similar storage environment.

[0029]

As described in detail above, according to the present invention, it is possible to prevent cold air from accumulating in the lower part of the refrigerator to become high in humidity and to prevent the formation of mold, thereby preventing the deterioration of the quality of the stored items. It is possible to provide a cooling device for a low temperature storage that realizes a quality storage environment. Further, according to the present invention, it is possible to provide a cooling device for a low-temperature storage that can effectively use the inside of the storage and save power and space.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a low temperature grain storage container according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a cooler with a dehumidifying function.

FIG. 3 is a perspective view showing a configuration of an upward blowing high-speed nozzle.

FIG. 4 is a horizontal sectional view of a low temperature grain storage container according to another embodiment of the present invention.

FIG. 5 is a sectional view taken along the line AA of FIG. 4;

6 is a sectional view taken along the line BB of FIG.

FIG. 7 is a vertical cross-sectional view showing an example of a conventional grain low temperature storage.

[Explanation of symbols]

1 ... Adiabatic skeleton, 3 ... Refrigerator, 5 ... Loading, 7 ... Cooler,
8 ... Blower, 9 ... Cooling coil, 10 ... Heating coil, 1
1, 11a, 11b ... Refrigerant liquid pipe, 12 ... Open / close valve, 13 ...
Expansion valve, 14A, 14B ... Blower for high speed nozzle, 15 ...
Upward blowing high speed nozzle, 16 ... Horizontal blowing high speed nozzle, 17 ... Small diameter duct, 18 ... Building outer wall, 19 ... Circulating wind tunnel.

Front page continuation (72) Inventor Teruo Kimura 1-23-2 Kandasuda-cho, Chiyoda-ku, Tokyo 2 Inside the System Engineering Center, Hitachi Engineering Co., Ltd. (72) Hideaki Sasaki Inoue, Morioka, Iwate Prefecture 4-10 No. JA Iwate Prefecture Economic Federation Facility Department

Claims (4)

[Claims] 1. A cooling device for a low-temperature storage, which has a refrigerator and a cooler for adjusting the air in the cold storage and a blower means in the ceiling of the cold storage, wherein the cooler provided in the ceiling is a cooling coil. A heating coil for circulating a high-temperature liquid refrigerant is also incorporated, and means for adjusting the flow of the liquid refrigerant to the heating coil is provided, and a blowing means for sucking cold air in the lower part of the low-temperature storage. And a high-speed airflow blowing means for blowing cool air upward along the heat insulating body wall surface, which is located in the space area between the heat insulating body and the load carrier inside the low-temperature storage, and which is connected to the blower means. Cooling device for low temperature storage. 2. A cooling device for a low-temperature storage, comprising a storage compartment partitioned by a heat insulating skeleton in a building, having a refrigerator, and having a cooler and a blowing means for conditioning the air inside the storage provided in a ceiling part of the storage compartment. The cooler provided in the ceiling part has a built-in heating coil for circulating a high-temperature liquid refrigerant together with a cooling coil, and is provided with a means for adjusting the flow of the liquid refrigerant to the heating coil. At least, a blowing means for sucking in cool air in the lower part of the cold storage, a duct for connecting cool air to the ceiling part connected to the blowing means, and a high-speed airflow blowing means for blowing cool air upward to be connected to the blowing means, A cooling device for a low-temperature storage, which is housed in and integrated with a box-shaped circulation wind tunnel, and the circulation wind tunnel is installed in a space region between the outer wall of the building and the heat insulating frame of the storage cabinet. 3. The cooling device for a low-temperature storage according to claim 2, wherein the refrigerator is installed in a space area between the outer wall of the building and the heat insulating frame of the storage room. 4. The cooling device for a cold storage according to claim 2, wherein the circulation wind tunnel is extended to the ceiling portion, and a cooler having a cooling coil and a heating coil built therein is housed in the circulation wind tunnel.