JP4856877B2 - Air conditioner - Google Patents

Description

The present invention relates to a cooling apparatus for cooling using cold radiation.

  In this specification and claims, the term “aluminum” includes aluminum alloys in addition to pure aluminum, and the term “copper” includes copper alloys in addition to pure copper. In this specification and claims, the top and bottom of FIGS. 2, 8 and 11 are the top and bottom.

  Recently, in addition to a cooling device that blows cold air directly into a room, a radiant cooling device that can perform cooling more comfortably using cooling radiation has been considered. The radiant cooling device is configured by arranging a plurality of radiant cooling panels in a ceiling.

  Conventionally, as a radiant cooling panel, a horizontal panel body made of an extruded aluminum material in which a U-shaped pipe receiving part is integrally formed on the upper surface, and a medium distribution pipe fitted into the pipe receiving part of the panel body, And a pipe fixing member for fixing the medium distribution pipe inserted in the pipe receiving portion, and rising walls are integrally formed on both side edges of the panel body so as to radiate cold radiation on the lower surface of the horizontal panel body. What has been made is known (see Patent Document 1).

  In addition, as a radiant cooling panel, a box-shaped panel body having a horizontal bottom wall portion in which a plurality of sound absorbing holes are formed, a heat exchange pipe disposed on the horizontal bottom wall portion of the panel body, and a heat exchange pipe from above It is provided with a heat insulating material disposed on the horizontal bottom wall portion so as to cover and a non-combustible material interposed between the horizontal bottom wall portion and the heat exchange pipe, and cools radiation on the lower surface of the horizontal bottom wall portion. What was made like this is also known (refer patent document 2).

However, in the radiant cooling panels described in Patent Documents 1 and 2, the indoor cooling is performed almost exclusively by cooling radiation, so that the cooling efficiency is relatively low, and only the area of the cooling radiation portion per ceiling projection area is limited. This also reduces the cooling efficiency. Therefore, in the radiant cooling device using the radiant cooling panels described in Patent Documents 1 and 2, in order to obtain the required cooling capacity, many radiant cooling panels must be used, and the installation area increases. There is a problem that the cost becomes high. That is, in the case of the radiant cooling panels described in Patent Documents 1 and 2, as shown in FIG. 12, an air flow is generated along the lower surface thereof, thereby generating natural convection, but the flow velocity of the air flow is small. Therefore, the heat transfer rate from the panel to the air is low, and the effect of natural convection is hardly obtained.
JP 7-19533 A Japanese Patent Laid-Open No. 10-227495

  The object of the present invention is to solve the above-mentioned problems and to provide a cooling panel having superior cooling efficiency compared to the radiation cooling panels described in Patent Documents 1 and 2, and a radiation cooling device described in Patent Documents 1 and 2. An object of the present invention is to provide a cooling device that is small in area and low in cost.

  In order to achieve the above object, the present invention comprises the following aspects.

1) and one strip-shaped inclined portion that is inclined relative to the horizontal plane, provided on become more elongated panel main body and the panel body, and a horizontal portion extending integrally formed and outward on each side edge of the inclined portion A plurality of cooling panels having cryogenic fluid circulation portions are arranged in parallel so that the upper horizontal portions and the lower horizontal portions of all the panel bodies are at the same height position, and these cooling panels are arranged by the holding frame. A cooling apparatus in which two types of cooling panels having a panel body in which the tubular cryogenic fluid circulation portions of all the cooling panels are communicated with each other and in which the inclination directions of the strip-like inclined portions are different are mixed.

2) The cooling apparatus according to 1) above, wherein the inclination angle of the inclined portion of the panel main body of the cooling panel with respect to the horizontal plane is 25 to 40 degrees.

3) A pair of ridges extending in the longitudinal direction of the panel body are provided on the upper surface of the widthwise intermediate portion of the strip-like inclined portion of the panel body, and spaced apart in the width direction. The cooling device according to 1) or 2) , wherein the cooling device is fitted between the two ridges of the cooling panel and is caulked by the both ridges.

4) The cooling apparatus according to 6) above, wherein the panel main body and the ridges of the cooling panel are integrally formed of aluminum, and the tubular cryogenic fluid circulation portion is made of a material having corrosion resistance to water.

5) Each straight pipe part of the meandering pipe having the same number of straight pipe parts as the panel main body of the cooling panel is fitted between both convex stripes of each cooling panel and is clamped by both convex stripes, and each straight pipe part is The cooling apparatus according to 3) or 4) above, which is a tubular cryogenic fluid circulation part.

6) A plurality of cooling panels having panel bodies having the same inclination direction of the strip-like inclined portions are arranged to form a first panel group, and the strip-like inclined portions of the panel bodies in the cooling panels of the first panel group A plurality of cooling panels having panel bodies with different inclination directions are arranged to form a second panel group, and in each panel group, the band plate-shaped inclined portion of one panel body of two adjacent panel bodies is formed. The upper horizontal portion of the inclined upper end overlaps the lower horizontal portion of the inclined lower end of the strip-like inclined portion of the other panel body when viewed from the plane, and the two panel groups are spaced from each other when viewed from the plane. The cooling device according to any one of 1) to 5) , which is arranged in the width direction of the panel main body so as to be formed.

According to the cooling devices 1) to 6) above, the air that flows along the upper surface of the inclined portion of the panel body flows downward through the gap between the adjacent cooling panels, and this flow follows the lower surface of the inclined portion. The air that has flowed through the air will merge, improving the cooling effect by natural convection. Therefore, the cooling effect is improved as compared with the radiation cooling devices described in Patent Documents 1 and 2, and the required cooling capacity can be obtained with a small number of cooling panels. As a result, the installation area of the cooling device can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left and right sides of FIGS. 2, 8 and 11 are referred to as the left and right sides, and the back side of the paper surface of FIGS. 2, 8 and 11 (the right side of FIGS. 1, 7 and 10) is the front side and the opposite side. Let's call it after. In addition, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

Embodiment 1
This embodiment is shown in FIGS. 1 and 2 show the overall configuration of the cooling device, and FIGS. 3 to 5 show the configuration of the main part thereof.

  In FIG. 1 and FIG. 2, the cooling device (1) is incorporated in a part of the ceiling of the room, and has a plurality of cooling panels (2) and a holding frame (3) for holding all the cooling panels (2). ). As for the cooling device (1), the required number of one or two or more is incorporated in the ceiling in consideration of the size of the room.

  The cooling panel (2) is a metal having excellent thermal conductivity, here a vertically long panel body (4) extruded from aluminum, and a tubular cryogenic fluid provided on the upper surface of the panel body (4). And a distribution part (5). All the cooling panels (2) are arranged such that the panel bodies (4) are spaced from each other in the left-right direction.

  As shown in FIG. 3, the panel main body (4) has a substantially mountain shape in cross section in which the center portion in the width direction (left-right direction) protrudes upward, and has two strip-like inclined portions (4a inclined with respect to the horizontal plane). )have. The inclination angle (X) of each inclined portion (4a) with respect to the horizontal plane (L) is preferably 25 to 40 degrees. This is because if the inclination angle is less than 25 degrees, the effect of improving the cooling effect by natural convection is small, and if it exceeds 40 degrees, the cooling effect by cold radiation may be reduced. A pair of ridges (4b) projecting upward and extending over the entire length of the panel body (4) are spaced apart in the left-right direction on the upper surface of the connecting portion of the two strip-like inclined portions (4a) of the panel body (4). It is integrally formed. In the panel body (4), a strip-shaped horizontal portion may be interposed between the inclined upper ends of the two inclined portions (4a).

  The low-temperature fluid circulation part (5) is a single meandering pipe having a plurality of straight pipe parts (6a) made of a metal having excellent heat conductivity and corrosion resistance to water, here copper and extending in the front-rear direction ( 6) straight pipe part (6a). That is, the number of straight pipe portions (6a) of the meandering pipe (6) is the same as the number of panel main bodies (4), and the portions excluding the front and rear ends of each straight pipe portion (6a) It is inserted between the two ridges (4b) of (4) and is clamped by the both ridges (4b). One end of the meandering pipe (6) is connected to the fluid supply pipe (7), and the other end is connected to the fluid discharge pipe (8).

  The holding frame (3) is made of a metal, here a front and rear frame member (9) that is extruded from aluminum and extends left and right, and a left and right frame member (11) that extends in the front and rear direction. A sandwiching plate (12) that is paired vertically is provided between the front and rear end portions of the member (11) and between the center portions in the front-rear direction. Each of the front and rear frame members (9) has a U-shaped cross section and is arranged with its opening directed inward in the front-rear direction so as to hide the bent portion (6b) of the serpentine tube (6). In the web portion (9a) of the front frame member (9), two through holes (not shown) through which both ends of the meandering tube (6) are passed are formed. Further, both flange portions (9b) of the front and rear frame members (9) sandwich the left and right frame members (11) from above and below. Each of the left and right frame members (11) has a U-shaped cross section and is arranged with its opening directed inward in the left-right direction. The sandwiching plate (12) has a strip shape extending in the left-right direction, and both left and right ends thereof are on the inner surface of the upper and lower flange portions (11a) of the left and right frame members (11), that is, the upper sandwiching plate (12). Are fixed to the lower surface of the upper flange part (11a) and the lower sandwiching plate (12) to the upper surface of the lower flange part (11a), respectively, and hold all the cooling panels (2) from above and below. ing. The upper sandwiching plate (12) is in contact with the low-temperature fluid circulation part (5) composed of the straight pipe part (6a), and the lower sandwiching plate (12) is a strip-like inclined part (4a) of the panel body (4). ) In contact with the inclined lower end side edge.

  When a plurality of cooling devices (1) are arranged side by side and incorporated in the ceiling, this is performed as follows. That is, as shown in FIG. 2 and FIG. 4, a suspension member (13, extruded from metal, here aluminum, between the left and right frame members (11) of the holding frame (3) of the adjacent cooling device (1)). ) And the suspension member (13) is fixed to a fixing member (15) extruded from a metal, here aluminum, fixed to the ceiling slab (14) in a suspended manner. A receiving portion (13a) that projects outward in the left-right direction and receives the frame member (11) of the holding frame (3) is integrally formed at the lower end of the suspension member (13), and the frame member of the suspension member (13) A fitting portion (13b) having a triangular cross section with a sharp upper end is integrally formed at the upper end protruding upward from (11). The lower end portion of the fixing member (15) is bifurcated and formed with a reverse V-shaped insertion groove (15a) that opens downward, and the grooves (15a) are inwardly provided at the lower ends of both side walls of the insertion groove (15a). The engaging portion (15b) protruding in the shape is integrally formed. Then, the insertion portion (13b) of the suspension member (13) is forcibly inserted into the insertion groove (15a) of the fixing member (15), and the protruding portion in the left-right direction of the insertion portion (13b) and the fixing member (15) By engaging the engaging portion (15b), the cooling device (1) is attached to the ceiling slab (14).

  To cool the room using the cooling device (1), a low-temperature fluid, for example, water is supplied from the fluid supply pipe (7) to the serpentine pipe (6), and the low-temperature fluid circulation of each cooling panel (2) is performed. Pour low temperature water through part (5). Then, the room is cooled by cold radiation. Further, as shown in FIG. 5, an air flow is generated along both the upper and lower surfaces of both inclined portions (4a). As a result, a cooling effect by natural convection is obtained in addition to the cold radiation. That is, the air flowing along the upper surfaces of the two inclined portions (4a) of the panel body (4) flows downward through the gap between the panel bodies (4) of the adjacent cooling panels (2), and this flow The air flowing along the lower surfaces of the two inclined portions (4a) will merge, and the cooling effect by natural convection will be excellent. Moreover, the flow velocity of the air flow along the upper and lower surfaces of the inclined portion (4a) is larger than that in the horizontal case shown in FIG. 12, and the heat transfer coefficient between the air and the inclined portion (4a) is improved.

  Next, a test conducted to confirm that the inclination angle (X) of each inclined portion (4a) of the panel body (4) with respect to the horizontal plane (L) is preferably 25 to 40 degrees will be described.

  First, an aluminum plate having a thickness of 1 mm was attached to one side surface of the room by changing the inclination angle with respect to the horizontal plane. Then, the temperature of the aluminum plate is set to 17 ° C. under conditions of an outside air temperature of 28 ° C., a floor temperature of 28 ° C., and a ceiling slab temperature of 23 ° C., and movement by natural convection and cold radiation from room air to the aluminum plate at each inclination angle The amount of heat was examined. The result is shown in FIG. In FIG. 6, the performance ratio on the vertical axis indicates the inclination angle of 0 degree, that is, the case of the horizontal state with respect to the moving heat amount by cold radiation, that is, 100%, and the moving heat amount by natural convection is inclined The angle is 90 degrees, that is, the vertical state is expressed as 100%. From the results shown in FIG. 6, it can be seen that when the inclination angle of the aluminum plate with respect to the horizontal plane is 25 to 40 degrees, the amount of moving heat due to natural convection increases while suppressing the decrease in amount of moving heat due to cold radiation. Therefore, it is preferable that the inclination angle (X) of each inclined portion (4a) of the panel body (4) with respect to the horizontal plane (L) is 25 to 40 degrees.

Embodiment 2
This embodiment is shown in FIGS. 7 and 8 show the overall configuration of the cooling device, and FIG. 9 shows the configuration of the main part thereof.

  In the case of the cooling device (20) of the second embodiment, the panel body (22) of the cooling panel (21) is extruded from a metal having excellent thermal conductivity, here aluminum, and is long and long in the front-rear direction. The upper and lower horizontal portions (22b) are formed integrally on both side edges of the belt-like inclined portion (22a) and the inclined portion (22a) and extend outward in the left-right direction. The inclination angle (X) of the inclined portion (22a) with respect to the horizontal plane (L) is preferably 25 to 40 degrees for the same reason as in the inclined portion (4a) of the first embodiment. On the upper surface of the intermediate portion in the width direction of the inclined portion (22a), a pair of protrusions (22c) projecting upward and extending over the entire length of the panel body (22) are integrally formed with an interval in the left-right direction. Then, the portion excluding the front and rear ends of each straight pipe portion (6a) of the meandering pipe (6) is fitted between the both ridges (22c) of each panel body (22), and both ridges (22c ), And each straight pipe part (6a) is a low-temperature fluid circulation part (5).

  All the cooling panels (21) have the same inclination direction of the strip-like inclined portion (22a) of the panel body (22) and are parallel to each other, and the upper horizontal portion (22b) and the lower horizontal portion ( 22b) They are arranged in parallel so that they are at the same height. The upper horizontal portion (22b) of the upper end of the slope of the strip-like inclined portion (22a) of one panel body (22) and the strip of the other panel body (22) of two adjacent panel bodies (22). The lower horizontal part (22b) of the inclined lower end of the inclined part (22a) overlaps when viewed from the plane.

  The upper sandwich plate (12) of the holding frame (3) is in contact with the upper horizontal portion (22b) of the panel body (22) of all the cooling panels (21), and the lower sandwich plate (12) is also the lower horizontal portion. (22b) In contact with the lower surface. Other configurations are the same as those of the cooling device (1) of the first embodiment.

  In the case of the cooling device (20) of the second embodiment, the room is cooled in the same manner as the cooling device (1) of the first embodiment.

Embodiment 3
This embodiment is shown in FIG. 10 and FIG.

  In the case of the cooling device (30) of the third embodiment, the same panel body (22) as that of the second embodiment is used, and the inclination direction of the strip-like inclined portion (22a) of the panel body (22) is different. There are various types of cooling panels (31A) and (31B). Here, a plurality of cooling panels (31A) are arranged so that the inclination directions of the strip-like inclined portions (22a) of the panel main body (22) are the same, thereby constituting the first panel group (32A), On the right side of the first panel group (32A), the other plurality of cooling panels (31B) are the cooling panels of the first panel group (32A) whose inclination direction of the strip-like inclined portion (22a) of the panel body (22) is the first panel group (32A). The second panel group (32B) is configured such that the inclination direction is different from that of the strip-like inclined portion (22a) of the panel body (22) in (31A). In each panel group (32A) (32B), the upper horizontal portions (22b) and the lower horizontal portions (22b) of all the panel bodies (22) are at the same height position, and two adjacent panel bodies ( 22), the upper horizontal part (22b) of the sloped upper end of the strip-like inclined part (22a) in one panel body (22) and the slope of the strip-like sloped part (22a) in the other panel body (22). The lower horizontal portion (22b) at the lower end overlaps when seen from the plane. Further, the two panel groups (32A) and (32B) are arranged in the left-right direction so that a gap is formed between the two panel groups (32A) and (32B) when viewed from above.

  The upper sandwich plate (12) of the holding frame (3) is in contact with the upper horizontal portion (22b) of the panel body (22) of all the cooling panels (31A) (31B), and the lower sandwich plate (12) is also It is in contact with the lower surface of the lower horizontal part (22b). Other configurations are the same as those of the cooling device (1) of the second embodiment.

  In the case of the cooling device (30) of the third embodiment, the room is cooled in the same manner as the cooling device (1) of the first embodiment.

  In the first to third embodiments, the low-temperature fluid circulation part (5) is composed of the straight pipe part (6a) of the copper meandering pipe (6), but is not limited to this, and the panel body (4) Materials with corrosion resistance to water, such as copper straight pipes, stainless steel straight pipes, resin straight pipes whose outer peripheral surfaces are covered with aluminum foil, which are clamped by the two ridges (4b) (22c) of (22) It may consist of a straight pipe formed by In this case, all the straight pipes of one cooling device (1), (20), (30) are covered with appropriate means having corrosion resistance to water, for example, copper U bend, stainless steel U bend, and the outer peripheral surface is covered with aluminum foil. The resin U-bends are connected in series. The low-temperature fluid circulation part (5) is a straight pipe part of a meandering pipe made of a material having corrosion resistance to water, for example, a straight pipe part or an outer peripheral surface of a stainless steel meandering pipe made of a resin covered with an aluminum foil. It may consist of a straight tube portion of a meandering tube. Further, when a fluid that does not corrode aluminum, such as antifreeze, is used as the fluid, the low-temperature fluid circulation part (5) is extruded integrally with the inclined parts (4a) (22a) of the panel bodies (4) (22). It may be formed into a tubular shape. In this case, all the tubular cryogenic fluid circulation parts of one cooling device (1), (20), (30) are connected in series by an appropriate means, for example, an aluminum U-bend.

It is a perspective view which shows the air_conditioning | cooling apparatus of Embodiment 1. FIG. It is the II-II line expanded sectional view of FIG. It is a cross-sectional view of the cooling panel in the cooling device of Embodiment 1. FIG. 3 is a partially enlarged view of FIG. 2. It is a figure which shows the flow of the air along the cooling panel of FIG. It is a graph which shows the result of the test done in order to confirm that it is preferable that the inclination angle with respect to the horizontal surface of each inclination part of the panel main body in the cooling panel of FIG. 3 is 25-40 degrees. It is a perspective view which shows the air conditioning apparatus of Embodiment 2. It is the VIII-VIII line expanded sectional view of FIG. It is a cross-sectional view of the cooling panel in the cooling device of Embodiment 2. It is a perspective view which shows the air conditioning apparatus of Embodiment 3. It is the XI-XI line expanded sectional view of FIG. It is a figure which shows the flow of the air along the radiation cooling panel of patent document 1 and 2.

(1) (20) (30): Air conditioner
(2) (21) (31A) (31B): Cooling panel
(3): Holding frame
(4) (22): Panel body
(4a) (22a): Strip-like inclined part
(5): Low temperature fluid circulation
(6): Serpentine tube
(6a): Straight pipe section
(L): Horizontal plane
(X): Inclination angle

Claims (6)

A vertically long panel body formed by one strip-shaped inclined portion inclined with respect to a horizontal plane, horizontal portions integrally formed on both side edges of the inclined portion and extending outward, and low-temperature fluid circulation provided in the panel body Multiple cooling panels with a section are arranged side by side so that the upper horizontal parts and lower horizontal parts of all panel bodies are at the same height, and these cooling panels are held together by a holding frame A cooling device in which the tubular cryogenic fluid circulation parts of all the cooling panels are communicated with each other and two types of cooling panels having panel bodies having different inclination directions of the strip-like inclined portions are mixed . The cooling device according to claim 1, wherein an inclination angle of the strip-like inclined portion of the panel main body of the cooling panel with respect to a horizontal plane is 25 to 40 degrees . A pair of ridges extending in the length direction of the panel main body are provided on the upper surface of the widthwise intermediate portion of the strip-shaped inclined portion of the panel main body at intervals in the width direction, and the tubular cryogenic fluid circulation portion is provided for each cooling panel. claim 1 or 2 cooling equipment according been caulking by fitting encased with biconvex conditions between both the ridges of. The cooling device according to claim 3, wherein the panel main body and the ridges of the cooling panel are integrally formed by extrusion from aluminum, and the tubular cryogenic fluid circulation part is made of a material having corrosion resistance against water . Each straight pipe part of the meandering pipe having the same number of straight pipe parts as the panel main body of the cooling panel is fitted between the both convex stripes of each cooling panel and is clamped by both convex stripes. The cooling device according to claim 3 or 4 which serves as a fluid circulation part . A plurality of cooling panels having panel bodies having the same inclination direction of the strip-like inclined portions are arranged to form a first panel group, and what is the strip-like inclined portion of the panel body in the cooling panel of the first panel group? A plurality of cooling panels having panel bodies with different inclination directions are arranged to form a second panel group, and in each panel group, the upper slope end of the strip-like inclined portion of one of the two adjacent panel bodies. The upper horizontal portion of the other panel body and the lower horizontal portion of the lower end of the slanted portion of the band plate-like inclined portion of the other panel body are overlapped when viewed from the plane, and two panel groups form a gap when viewed from the plane. The cooling device according to claim 1, wherein the cooling device is arranged in the width direction of the panel body .

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