JP4679881B2 - Cooling room - Google Patents

Description

  The present invention relates to a windless cooling type cooling chamber that performs cooling without sending cold air directly into the room.

  When cooling a room used for a refrigerated warehouse or an environmental test room, it is common to provide cooling means such as a unit cooler in the room to cool and circulate the room air.

  However, for example, when frozen food is stored in a refrigerated warehouse, there is a concern that drying may be caused by cold air on indoor items, or when test air is blown on the specimen in an environmental test room, the test results may be affected. In some cases, when it is necessary to prevent cold air from being applied to indoor items, an inner wall that is separated from the outer wall is provided inside the outer wall of the cooling chamber, and a cooling air circulation path is provided between the outer wall and the inner wall. There is a case where no-air cooling is performed so that the cold heat of the air flowing through the circulation path is radiated and transmitted to the room to be cooled through the inner wall (see, for example, Patent Documents 1 and 2).

In the above-described no-air cooling, since the inner wall is interposed between the cooling air flowing through the circulation path and the room air, the cooling efficiency is lower than in the case where the cooling air is sent directly into the room, and the room temperature is uneven. There is a problem that it is easy to occur and temperature control is not easy.
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 chamber that can efficiently perform cooling without blowing cool air to an article in a room that is an object to be cooled, and that can also reduce running costs.

In order to achieve the above object, a cooling chamber according to the present invention has an inner wall body that is separated from the outer wall body and conducts internal and external cold heat inside the outer wall body having a heat insulating layer, and the outer wall body and the inner wall body. comprising a cold air circulating path for cooling air is circulated between, the side wall upper portion in the inside of the inner wall member, it sucks indoor air, from the delivery port formed in a casing lower surface to the inner surface of the side wall portion of the inner wall member A blower that sends indoor air along the bottom surface of the ceiling portion of the inner wall body, and a blower that sucks room air and diffuses and sends the air along the bottom surface of the ceiling. The sent air is sent to the blower on the side wall along the lower surface of the ceiling, and the air sent from the blower on the side wall is made to flow along the inner surface of the side wall.

  In addition, when the door of the inlet / outlet of the cooling chamber is closed, when the door of the inlet / outlet is closed, the operation / stop is controlled in the same manner as the operation / stop of the other fans. While the is open, it is configured such that the air curtain is formed at the entrance and exit even when other blowers are stopped.

  According to the present invention, the cold heat of the cooling air circulating in the cold air circulation path is conducted to the cooling chamber through the inner wall body, and the indoor air is cooled by the cold heat radiated from the inner wall body.

  In addition, indoor air is caused to flow along the inner wall body by the blower provided on the inner wall body, and the indoor air flowing along the inner wall body is cooled by taking the cold of the inner wall body.

  Therefore, the indoor air flows along the inside of the inner wall body, but is not blown to the indoor article, and therefore the article can be efficiently cooled without being affected by the cold air such as drying.

  In addition, since the indoor air flows through the inner wall, the temperature of the indoor air is less likely to occur than in the case of only radiative cooling from the inner wall, and the indoor temperature can be accurately controlled.

In addition, if the set room temperature is the same, the temperature of the cooling air in the cold air circulation path can be set higher than in a conventional apparatus in which no blower is provided in the room.
Therefore, the refrigerator can be operated with high efficiency, energy saving can be achieved, and the temperature of the inner wall body is higher than that of a conventional one without a blower in the room, so that frost formation on the inner wall is suppressed. be able to.

  Furthermore, in the configuration in which the blower at the entrance / exit portion of the cooling chamber is configured to be driven when the entrance / exit is opened, the air from the blower can be used as an air curtain, and the temperature change in the cooling chamber due to opening / closing of the entrance / exit is possible. Can be made small.

Embodiments of the cooling chamber according to the present invention will be described below in detail with reference to specific examples shown in the accompanying drawings.
A cooling room 1 such as a refrigerated warehouse or an environmental test room includes an outer wall 2 having a heat insulating layer 2a and an inner wall 3 separated from the outer wall, and a cold air circulation path 4 is provided between the outer wall and the inner wall. Is formed.

  An air cooling device 5 is provided in the cold air circulation path. The air cooling device includes an evaporator 7 and a blower 8 to which refrigerant is supplied from an external refrigerator 6 through a refrigerant forward pipe 6a and a return pipe 6b. The cooling air is configured to circulate in the cold air circulation path 4 by driving the blower 8.

  Thus, blowers 9 and 10 are provided on the side wall portion of the inner wall body 3 and the lower surface of the ceiling portion, respectively, and these blowers are configured to suck indoor air and send it out along the inner wall body.

  Specifically, for example, an axial fan is used for the blower 10 in the ceiling portion, and the indoor air from the suction port 10a provided in the lower part of the blower casing is omnidirectional from the plurality of outlets 10b opened in the casing side surface. It is configured to be discharged.

  Further, for example, a cross-flow fan is used for the blower 9 on the side wall, and is provided on the upper side of the side wall. The air is discharged from the outlet 9b.

  The air blowers 9 and 10 described above are controlled to be operated and stopped according to the temperature in the cooling chamber as in the air cooling device 5. The blower 9A provided at the upper part of the entrance / exit of the cooling chamber is normally controlled to be operated and stopped in the same manner as other blowers, but when the door 1a at the entrance / exit of the cooling room is opened, the other blower is operated and stopped. The operation is continued regardless of the control, and the operation is continued until at least the door 1a is closed. Thus, while the door is open, an air curtain is formed at the entrance by driving the blower 9A, and the inflow of outside air from the entrance and the outflow of cool air in the cooling chamber is suppressed to be as small as possible. .

  In the embodiment described above, the air cooling device 5 is provided in the cold air circulation path. However, the air cooling device is provided outside the cooling chamber, and the cooling air is supplied from the air cooling device through an air passage such as a duct. May be supplied to the cold air circulation path 4.

  Further, depending on the shape of the cooling chamber and the articles accommodated in the cooling chamber, the ceiling fan 10 may not be provided, or the side wall fan may not be provided on all the side walls.

The longitudinal cross-sectional view of the cooling chamber which concerns on this invention. The cross-sectional view of the cooling chamber which concerns on this invention. The bottom view which fractures | ruptures and shows a part of air blower for ceiling parts.

Explanation of symbols

1 Cooling room
2 outer wall
3 inner wall
4 Cold air circulation
5 Air cooling device
6 Refrigerator
7 Evaporator
8 Blower
9 Side wall blower 10 Ceiling blower

Claims (2)

Inside the outer wall body having a heat insulating layer, an inner wall body that is separated from the outer wall body and conducts internal and external cold heat, and includes a cold air circulation path through which cooling air is circulated between the outer wall body and the inner wall body, A blower that sucks room air into the upper part of the side wall part inside the inner wall body and sends the room air along the inner surface of the side wall part of the inner wall body from a delivery port provided on the lower surface of the casing is provided, and the inner wall body A blower that sucks indoor air and diffuses and sends out air along the lower surface of the ceiling is provided on the lower surface of the ceiling portion in the air, and the air sent from the blower on the lower surface of the ceiling portion is sent to the blower on the side wall portion along the lower surface of the ceiling. A cooling chamber configured such that the air sent from the blower on the side wall portion flows along the inner surface of the side wall portion.
The blower that sends room air to the entrance / exit part of the cooling chamber is controlled to operate and stop in the same way as the operation and stop of other fans when the door of the entrance is closed, but the door of the entrance is opened. 2. The cooling chamber according to claim 1, wherein the cooling chamber is configured so that an air curtain is formed at an inlet / outlet while the other blower is stopped while the fan is stopped.

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