JP2009216361A - Windless cooling system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a windless cooling system with high cooling efficiency, uniformizing an interior temperature in a cooling chamber, and cooling articles in the cooling chamber without exposure to cold air. <P>SOLUTION: A typical composition of the windless cooling system has an outer wall body 2 with low heat conductivity, and an inner wall body 3 with high heat conductivity, and an inner side of the inner wall body 3 is cooled by circulating cooled air through a gas circulation passage 4 formed between the outer wall body 2 and the inner wall body 3. It is equipped with: an opening 7 provided, communicated with substantially the same positions of the outer wall body 2 and the inner wall body 3; and a door 8 for opening and closing the opening 7. It is characterized in that the door 8 has an outer door 8a with low heat conductivity, and an inner door 8b with high heat conductivity, and a cavity 8d is provided, communicated with the gas circulation passage 4 between the outer wall body 2 and the inner wall body 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a windless cooling system that performs cooling without directly feeding cold air into a room to be cooled, and more particularly, to a windless cooling system having a main feature of a door provided in an opening.

  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, when cold air is directly applied to articles in the room to be cooled, the object to be cooled may be damaged due to drying or the like, and so-called no-air cooling may be 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, and the cold heat of the gas flowing through this gas circulation path is covered through the inner wall. It cools indirectly by radiating into the cooling chamber.

  By the way, in order to cool the inside of the room to be cooled uniformly, it is desirable to perform cooling from all positions on the inner wall. However, at least an opening for carrying the article in and out of the room to be cooled is necessary, and a door is provided in the opening. The door has a heat insulating structure, but the door portion (opening) could not be cooled.

  In addition, for the purpose of cooling from all positions on the inner wall as described above, it is common that no window is provided in the cooled chamber. This is because if a window is provided, no gas circulation path is formed in that portion, and therefore the inside cannot be cooled in the window portion. Furthermore, external heat may flow from the window into the chamber to be cooled, and uniform cooling may be significantly impaired. On the other hand, it is conceivable to install a camera or the like in order to check the inside of the cooling room, but it is convenient if the inside can be directly viewed with the naked eye, and there is also a demand to provide a window.

  Further, since no-air cooling does not directly cool the room to be cooled by cooling air, it cannot be said that the cooling efficiency is high. Therefore, the cooling rate is also slower than in the case of direct cooling. For this reason, it is desirable that the air inside and outside the room should not be exchanged as much as possible when the article is carried in and out of the room to be cooled.

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 windless cooling system that has high cooling efficiency, can make the inside temperature of a room to be cooled uniform, and can cool an article in the room to be cooled without being exposed to cold air. It is said.

  A typical configuration of the windless cooling system according to the present invention includes an outer wall body having a low thermal conductivity and 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. In an airless cooling system that cools the inside of the inner wall body by circulating the cooled air, an opening provided in communication with substantially the same position of the outer wall body and the inner wall body, and opening and closing the opening. And the door includes an outer door having a low thermal conductivity and an inner door having a high thermal conductivity, and the outer wall body and the inner wall body between the outer door and the inner door. A gap communicating with the gas circulation path is provided.

  The door may open and close the opening by sliding in conjunction with the outer wall and the inner wall. Further, it is desirable that the gas circulation path in the opening includes a rectifying means for rectifying and discharging air on the upstream side through which air flows.

  According to the present invention, the door portion can be cooled, so that the internal temperature in the cooling chamber can be made uniform. In addition, since the coolable window portion is configured, the inside can be visually recognized without impairing the uniformity of the internal temperature, and the convenience of handling can be improved.

  A first embodiment of a windless cooling system according to the present invention will be described with reference to the drawings. 1 is a side cross-sectional view showing the overall configuration of the windless cooling system, FIG. 2 is a plan cross-sectional view illustrating the vicinity of the door, FIG. 3 is a view illustrating another configuration near the door, and FIG. 4 is a cooling in the air circulation path. It is a figure explaining circulation of air.

  A chamber 1 to be cooled, such as a refrigerated warehouse, includes an outer wall body 2 having a heat insulating layer 2 a and an inner wall body 3 that is separated from the outer wall body 2, and a gas circulation path is provided between the outer wall body 2 and the inner wall body 3. An air circulation path 4 as an example is formed. An evaporator 5 and a blower 6 are provided inside the air circulation path 4, and the air is circulated in the air circulation path 4 by driving the blower 6.

  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 FIGS. 1 and 2, the outer wall body 2 and the inner wall body 3 are provided with an opening 7 communicating with substantially the same position, through which an article is carried out to the inside of the chamber 1 to be cooled. It is possible to enter.

  As shown in FIG. 2A, the door 8 for opening and closing the opening includes an outer door 8a having a low thermal conductivity (high thermal insulation) and an inner door having a high thermal conductivity (high thermal conductivity). And a door 8b. The outer door 8a and the inner door 8b are connected by a frame 8c, and a gap 8d is formed between the outer door 8a and the inner door 8b. And as shown in FIG.2 (b), it is comprised so that the opening part 7 may be opened and closed by slidingly moving in response.

  On the other hand, as shown in FIG. 2, the ends of the air circulation path 4 are openings on both the left and right sides of the opening 7. For these reasons, the air circulation path 4 formed between the outer wall body 2 and the inner wall body 3 communicates with the gap 8d formed between the outer door 8a and the inner door 8b.

  As shown in FIG. 1, in the present embodiment, a partition plate 7 a is provided on the upper side of the opening 7 to seal the air circulation path 4. Further, as shown in FIG. 4, a partition plate 4 a is provided inside the air circulation path 4, and the air flow by the blower 6 is configured to flow from one side of the opening 7 toward the other side. In addition, arrangement | positioning of the partition plate 4a is an example, Comprising: It is thought that it will become a different arrangement | positioning, considering cooling air spreading and efficiency, but this invention does not limit this.

  With the above configuration, the cooling air circulates inside the door 8 when the door 8 is closed as shown in FIG. Since the inner door 8b has a high thermal conductivity, the door portion is also cooled through the inner door 8b. Therefore, the cooling efficiency is high, and the inside temperature of the room to be cooled can be made uniform. In addition, as a structure of a door with high heat conductivity, it is possible to provide a rib vertically and horizontally, for example in door plates, such as aluminum and stainless steel. At this time, if there are protrusions such as ribs, the flow of cooling air may be hindered or wind noise may be generated. Therefore, the ribs may be provided inside the chamber 1 to be cooled.

  In addition, even when the door 8 is opened as shown in FIG. 2B, the upstream side of the air circulation path 4 in the opening 7 has a positive pressure and the downstream side has a negative pressure. Circulates with high efficiency and forms a so-called air curtain. Therefore, even if the door 8 is opened, the flow of air inside and outside the cooled chamber 1 can be suppressed, so that the cooling efficiency can be greatly improved.

  Furthermore, as shown in FIG. 3 (a), rectifying means 18 such as a lattice or nozzle is provided on the upstream side of the air circulation path 4 in the opening 7, and the cooling air to be discharged is made into a laminar flow, thereby The reach can be extended. If the laminar flow reaches the opening on the downstream side of the air circulation path 4 in this way, the performance of the air curtain can be improved, loss of cooling air can be suppressed, and cooling efficiency can be further improved. In addition, since a known technique can be used for the condition of the rectification means, it will not be described in detail here.

  In the present embodiment, the door 8 is described as opening and closing by sliding and moving between the outer wall body 2 and the inner wall body 3, but the present invention is not limited to this. For example, as shown in FIG. 3B, the door 15 can be moved along a rail (not shown), and can be translated along the outer wall 2 and the inner wall 3 after being detached from the opening 7. Good. That is, the open door is not required to block the air curtain formed in the opening 7, and as another example, the door rotated by the two-stage hinge may be retracted from the opening 7.

  Moreover, if the cooling air which distribute | circulates the air circulation path 4 has high humidity, frost will generate | occur | produce and there exists a possibility that cooling efficiency may fall. And when the door 8 is opened and closed, outside air is mixed into the air circulation path 4, which may be affected by the humidity of the outside air. For this reason, although not shown, it is preferable to provide a dehumidifier that performs dehumidification from the inside of the air circulation path 4.

  Next, a second embodiment of the windless cooling system according to the present invention will be described. FIG. 5 is a view for explaining the vicinity of the window. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  This embodiment relates to the window portion. As shown in FIG. 5, the outer wall body 2 and the inner wall body 3 are provided with an opening 16 communicating with substantially the same position. The opening 16 is the same as the opening 7 in that it is formed to communicate the chamber 1 to be cooled with the outside. However, since the article is not carried in / out, the position and the size are such that the inside can be visually confirmed. That's enough.

  The window 17 attached to the opening 16 includes an outer window 17a as an outer transparent member and an inner window 17b as an inner transparent member. The outer window 17a is attached to the outer wall body 2, seals the opening 7, and is configured by a transparent member having low thermal conductivity (high heat insulating property). The inner window 17b is attached to the inner wall body 3 to seal the opening 7, and is constituted by a transparent member having a high thermal conductivity (high thermal conductivity). A gap 17c is formed between the outer window 17a and the inner window 17b, and the gap 17c communicates with the air circulation path 4 formed between the outer wall body 2 and the inner wall body 3.

  Therefore, the cooling air flowing through the air circulation path 4 also circulates inside the window 17 and the inner window 17b is configured to have a high thermal conductivity, so that the cooling is also performed through the inner window 17b in the window portion. That is, it is possible to visually recognize the interior without impairing the uniformity of the internal temperature.

  For the outer window 17a, it is preferable to use a resin material such as vinyl chloride, acrylic, polycarbonate or the like rather than just glass in order to improve heat insulation. In addition, heat insulation can be dramatically improved by the multi-layer structure, and paired glass and triple glass with an air layer between them, those composed of resin materials, and those in which glass and resin materials are bonded together are suitable. Can be used.

  As the inner window 17b, it is preferable to use a thin material in order to improve the heat flow, and it is possible to use a polycarbonate having a high strength even if it is thin. Moreover, heat-flow property can be further improved by mixing a metal powder with high heat conductivity into the material.

  INDUSTRIAL APPLICABILITY The present invention can be used for a windless cooling system that performs cooling without sending cold air directly into a room to be cooled.

Side surface sectional drawing which shows the whole structure of a windless cooling system. The plane sectional view explaining the door neighborhood. The figure explaining the other structure of the door vicinity. The figure explaining circulation of the cooling air in an air circulation way. The figure explaining the window vicinity.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooling chamber 2 Outer wall body 2a Heat insulation layer 3 Inner wall body 4 Air circulation path 4a Partition plate 5 Evaporator 6 Blower 7 Opening part 7a Partition plate 8 Door 8a Outer door 8b Inner door 8c Frame 8d Space 9 Ammonia refrigerator 10 Compressor DESCRIPTION OF SYMBOLS 11 Condenser 12 Refrigerant outbound pipe 13 Expansion valve 14 Refrigerant return pipe 15 Door 16 Opening part 17 Window 17a Outer window 17b Inner window 17c Space | gap 18 Rectification means

Claims (3)

The outer wall body having a low thermal conductivity and the inner wall body having a high thermal conductivity, and the cooled air is circulated through a gas circulation path formed between the outer wall body and the inner wall body. In the windless cooling system that cools the inside,
An opening provided in communication with substantially the same position of the outer wall body and the inner wall body;
A door for opening and closing the opening,
The door includes an outer door having a low thermal conductivity and an inner door having a high thermal conductivity, and a gas circulation path between the outer wall body and the inner wall body between the outer door and the inner door. An airless cooling system having a communicating air gap.   The windless cooling system according to claim 1, wherein the door opens and closes the opening by sliding in conjunction with the outer wall body and the inner wall body.   3. The windless cooling system according to claim 1, wherein the gas circulation path in the opening includes rectification means for rectifying and discharging air on an upstream side where air flows. 4.

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