JP4823320B2 - Cooling system - Google Patents

Description

  The present invention relates to a cooling system that performs cooling without directly feeding cool air into a room to be cooled, and more particularly to a cooling system that can also send cold air directly into a room to be cooled.

  When cooling a room to be cooled such as a refrigerated warehouse or an environmental test room, it is common to send cold air directly into the room to be cooled. However, if cold air is directly applied to an object to be cooled in the room to be cooled, the object to be cooled may be damaged due to drying or the like. Moreover, although the space in a to-be-cooled room becomes a complicated shape by storing a to-be-cooled object, since it is necessary to circulate cold air in the whole space, big energy is required for ventilation.

  Thus, so-called no-air cooling is sometimes performed (see, for example, Patent Documents 1 and 2). The general structure of no-air cooling is that the chamber to be cooled has a double structure of an outer wall and an inner wall, and the space between the outer wall and the inner wall is a refrigerant gas circulation path. It cools indirectly by radiating into the cooling chamber.

  However, no-air cooling does not directly cool the interior of the room to be cooled by cooling air, so it cannot be said that the cooling efficiency is high. Therefore, there is a problem that the cooling rate is also slower than that in the case of direct cooling.

Japanese Utility Model Publication No. 6-51769 (pages 1 and 2, FIGS. 1 to 3) Japanese Patent No. 3522977 (Pages 1-5, FIGS. 1-2)

  An object of the present invention is to provide a cooling system capable of cooling an object to be cooled in a room to be cooled without being exposed to cold air and capable of rapid cooling.

A typical configuration of the cooling system according to the present invention is cooled by an outer wall body having a low thermal conductivity, an inner wall body having a high thermal conductivity, and a gas circulation path formed between the outer wall body and the inner wall body. A cooling system that cools a chamber to be cooled inside the inner wall body, and a plurality of air outlets and suctions that connect the gas circulation path and the chamber to be cooled to the inner wall body Provided with an opening, air cooled in the cooled chamber can be ventilated , each outlet or suction port is provided with an air volume adjusting means, and is controlled so that the cooled chamber has a required temperature distribution. It is characterized by.

  The air volume adjusting means may be capable of partially adjusting the air volume of the air outlet or suction port with respect to its area. Moreover, it is preferable that the same air volume adjusting means has a structure capable of sealing the air outlet or the suction port.

  Further, at least the air outlet may be configured by a large number of openings, and the openings may be configured so that the density of the opening area varies depending on the position with respect to the ventilation means.

  According to the present invention, the cooling air can be circulated into the room to be cooled while the cooling system is a basic configuration. Accordingly, it is possible to rapidly cool the object to be cooled while preventing the object to be cooled from being dried by being exposed to the cold air. Moreover, since a desired area in the room to be cooled can be intensively cooled, the cooling efficiency can be greatly improved.

It is a longitudinal cross-sectional view which shows the whole structure explaining the outline of a cooling system. (A) is a horizontal sectional view, (b) is a sectional view taken along the line BB of (a), and (c) is a sectional view taken along the line CC of (a), illustrating the features of the cooling system according to the first embodiment. It is. The cool air flow path formed in the room to be cooled will be described. (A) is a perspective view and (b) is a horizontal sectional view. (A) is a top view explaining the characteristic of the cooling system which concerns on 2nd Example, (b) is the BB sectional drawing of (a).

A cooling system according to a first embodiment of the present invention will be described.
FIG. 1 is an overall configuration diagram for explaining the outline of the cooling system, FIG. 2 is a diagram for explaining the features of the cooling system according to the present embodiment, and FIG. 3 is a diagram for explaining a cold air flow path formed in the room to be cooled. .

First, the overall configuration of the cooling system will be described with reference to FIG.
A room 1 to be cooled, such as a refrigerated warehouse, includes an outer wall 2 having a heat insulating layer 2a and a low thermal conductivity, and an inner wall 3 having a high thermal conductivity spaced apart from the outer wall 2 and these outer walls. An air circulation path 4 as an example of a gas circulation path is formed between the body 2 and the inner wall body 3. An evaporator 5 and a blower 6 are provided inside the air circulation path 4, and air is circulated in the air circulation path 4 by driving the blower 6 as an example of a ventilation means.

  Ammonia refrigerant is supplied to the evaporator 5 from an ammonia refrigerator 9 provided outside the chamber 1 to be cooled. Specifically, the ammonia refrigerant having passed through the compressor 10 and the condenser 11 is sent to the evaporator 5 through the refrigerant forward pipe 12 and the expansion valve 13, and the refrigerant from the evaporator 5 is sent to the compressor 10 through the refrigerant return pipe 14. It is supposed to be returned to.

  The cooled air circulates in the air circulation path 4 by driving the blower 6, and the cold heat of the cooling air in the circulation path is transmitted to the air in the cooled room 1 through the inner wall 3, and the cooled room 1 The inside is cooled to the required temperature.

  As shown in FIG. 1 and FIG. 2, in the present embodiment, an air outlet 20 that connects the air circulation path 4 and the room 1 to be cooled is formed in the ceiling portion of the inner wall body 3. A suction port 22 is also formed below the blower 6 of the inner wall body 3 so that the chamber 1 and the air circulation path 4 communicate with each other. Here, the blower 6 sends air from one end of the ceiling portion of the air circulation path 4 toward the center. The blower outlet 20 is on the downstream side of the blower 6 and becomes a positive pressure, and the suction port 22 is the blower 6. It is upstream of the negative pressure. Therefore, the cooling air sent out from the blower 6 not only circulates in the air circulation path 4 but also partially enters the cooled chamber 1 from the outlet 20 and re-enters the air circulation path 4 from the suction port 22. Can be guided and circulated.

Air outlet 20 and the suction port 22 in this embodiment is constructed by arranging the opening of the large number of slit-shaped. In addition, slide plates 21 and 23 (shutters) are provided as examples of the air volume adjusting means.
The opening need not be slit-shaped, and may be a punched circular hole. In this embodiment, a slide plate is used as the air volume adjusting means. However, a rotating plate member (flapper) or a configuration in which two circular plates having a notch in the radial direction are relatively rotated is used. But you can.

  The slide plates 21 and 23 can adjust the air volume by adjusting the amount of displacement with respect to the air outlet 20 or the suction port 22. Further, the slide plates 21 and 23 may not only open / close the air outlet 20 or the suction port 22 as a whole, but also partially open / close the area (region). For example, it is good also as dividing the blower outlet 20 into about 3 area | regions, and making each openable | closable independently.

  Then, by shifting the positions of the slide plates 21 and 23 and sealing the air outlet 20 and the suction port 22, the circulation of the cooling air between the air circulation path 4 and the chamber 1 to be cooled can be blocked. Thus, this cooling system can perform windless cooling.

  On the other hand, by opening the slide plates 21 and 23 and opening the air outlet 20 and the suction port 22, as shown in FIG. 3A, the cold air passage 24 can be formed inside the chamber 1 to be cooled.

In the case where the cooling air is allowed to flow only through the cold air passage 24 , the storage area 1a is used as the area for placing the object 7 to be cooled and the passage area 1b is used as the carry-in / out passage. For example, it is preferable to arrange the air outlet 20 and the suction port 22 so that the cool air passage 24 is formed at a position corresponding to the passage area 1b. Thereby, since the circulation of the cool air passage 24 is not hindered, the passage area 1b can be rapidly cooled.
Therefore, for example, the passage area 1b is cooled to a temperature about 5 ° C. lower than the target temperature of the chamber 1 to be cooled, and the air outlet 20 and the suction port 22 are sealed and cooled without wind, so that the storage area 1a and the passage area 1b Air naturally mixes, and as a result, the object 7 to be cooled can be rapidly cooled. That is, it is possible to rapidly cool the object 7 to be cooled, for example, at the time of warehousing, while preventing the object to be cooled 7 from being dried by direct cooling air.

In addition, the pressure of the cooling air is high in the portion close to the blower 6 in the air outlet 20, and the pressure is low in the far portion. Therefore, if the opening (slit) having the same size is provided, the discharge amount of the cooling air may not be sufficient from the slit far from the blower 6.
Therefore, as shown in FIG. 3B, it is preferable to vary the density of the opening area according to the position with respect to the blower 6. Specifically, it is preferable to decrease the opening density as the distance from the blower 6 decreases and to increase the opening density of the slits as the distance from the blower 6 increases.

  Moreover, the to-be-cooled object 7 is not always a thing which fears drying, for example, when packed. Therefore, such an object to be cooled 7 can be cooled very rapidly by placing it in the passage area 1b (that is, in the cold air passage 24) at the time of high temperature storage.

A second embodiment of the cooling system according to the present invention will be described.
FIG. 4 is a plan view and a front sectional view for explaining the features of the cooling system according to the present embodiment.

In the said 1st Example, it demonstrated so that the blower outlet 20 might be arrange | positioned only in the position above the channel | path area 1b.
In contrast, in this embodiment, as shown in FIG. 4, the air outlet 20 is provided over almost the entire inner wall body 3. The whole surface is, for example, a ceiling part and a side wall part. However, the side wall provided with the suction port 22 is not suitable for providing the air outlet 20 because the pressure difference of the cooling air does not occur and the circulation into the cooled chamber 1 does not occur.

  The air outlet 20 is provided with a slide plate 21 as in the first embodiment, so that the air volume can be adjusted. Here, the slide plate 21 may not only open / close all the air outlets 20 in a lump, but also partially open / close the area (region). In other words, a plurality of air outlets 20 may be provided, and each air outlet 20 may be individually adjustable in air volume.

  By configuring as described above, the cooling air can be directly applied to the object to be cooled 7 by opening the air outlet 20 provided in the storage area 1a. This is because, when the object 7 to be cooled is a packaged product, there is no fear of drying even if direct cooling is applied. Accordingly, it is possible to rapidly cool the object 7 to be cooled immediately after entering the warehouse, and it is possible to improve the cooling efficiency. Further, it can be effectively used in control for keeping the internal temperature uniform.

  In addition, it is the same as that of the said 1st Example that it can utilize as a windless cooling system by sealing the slide plate 21 of the blower outlet 20, and the slide plate 23 of the suction port 22. FIG.

In the second embodiment, the flow and temperature distribution of the cooling air in the cooled chamber 1 can be freely controlled by appropriately controlling the open / closed state of the air outlet 20 and the suction port 22. Therefore, temperature / humidity sensors are arranged at various locations in the room 1 to be cooled, and based on signals from these sensors, cooling air is blown out only in areas that require cooling, or the amount of ejection is increased. Adjustments can be made.

In addition, it is desirable to set a plurality of cool air supply patterns and to perform opening / closing or opening degree control of the air outlet and the suction port according to these patterns.
Specifically, the inside of the chamber 1 to be cooled is divided into a plurality of cooling areas so that cold air can be intensively supplied to each area. When the object to be cooled is placed near the lower side of the cooling air, the cooling air flows only in the area to be cooled in the vicinity of the evaporator. Similarly, the cooling air is only in the center of the room to be cooled. Set the circulation pattern and the pattern that the cooling air flows only along the inner wall, and set the opening and closing and opening control of the outlets and suction ports corresponding to these patterns in advance. Then, control corresponding to the pattern is performed as necessary.
In this way, the cooling efficiency can be further improved and energy saving can be achieved.

  The present invention can be used as a cooling system capable of performing windless cooling and direct cooling.

DESCRIPTION OF SYMBOLS 1 ... Cooling room 1a ... Storage area 1b ... Passage area 2 ... Outer wall body 2a ... Heat insulation layer 3 ... Inner wall body 4 ... Air circulation path 5 ... Evaporator 6 ... Fan 7 ... Cooled object 9 ... Ammonia refrigerator 10 ... Compression Machine 11 ... Condenser 12 ... Refrigerant outbound pipe 13 ... Expansion valve 14 ... Refrigerant return pipe 20 ... Outlet 21 ... Slide plate 22 ... Suction port 23 ... Slide plate 24 ... Cold air passage

Claims (1)

An outer wall body having a low thermal conductivity; an inner wall body having a high thermal conductivity; and a ventilation means for circulating cooled air in a gas circulation path formed between the outer wall body and the inner wall body. In the cooling system that cools the room to be cooled inside the body,
The inner wall body is provided with a plurality of air outlets and suction ports for communicating the gas circulation path and the room to be cooled, and the air cooled in the room to be cooled can be ventilated.
Each of the air outlets or suction ports is individually provided with air volume adjusting means,
The cooling system is controlled by signals from a plurality of temperature sensors or humidity sensors corresponding to the respective air outlets or suction ports so that the room to be cooled has a required temperature distribution .

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