JP4926089B2 - Air conditioner with temperature difference between inside and outside - Google Patents

Description

  The present invention belongs to the technical field of an outer wall panel of an apparatus having an internal / external temperature difference such as an air conditioner, in particular, an outer wall panel also serving as an inspection window.

Conventionally, the outer wall panel of this type of air conditioner is made by attaching glass wool on the back surface of a steel plate outer plate or sandwiching an outer plate and an inner plate arranged at a predetermined interval between them. A urethane resin foam is filled (Patent Document 1). The thickness of these glass wool and foaming agent is changed by the required heat insulation grade.
In addition, in an apparatus that contains an operating part such as an air conditioner, an inspection window made of a transparent material such as acrylic or glass with a diameter of about 150 mm may be provided on the outer plate or part of the inspection door for visualization inside the apparatus (patented) Reference 2).
In particular, in the air conditioning operation of an air conditioner, a temperature difference occurs between the inside and outside of the machine, and it is used as a heat insulating material to reduce the heat loss. Glass wool is also used as a noise countermeasure. It is attached for the purpose of visualizing the spray state such as from the outside of the machine.
JP 2003-194361 A JP 2004-332383 A

However, glass wool used for outer wall panels is subject to deterioration due to peeling and scattering due to secular change, and there is a problem that maintenance such as reattachment and repair is required regularly. Currently, 30mm is the mainstream because of the problem that the foaming agent such as urethane resin hardens before it gets into the back if the gap is narrow and it cannot be made smaller than the outer dimensions of the filling nozzle. Therefore, downsizing is required. Rarely used for fan coils.
In order to visualize the inside of the machine, it is desirable that the inspection window is large, but since the heat insulation performance of acrylic and glass is not high, condensation may occur depending on conditions. Therefore, if the inspection window is too large, condensation will occur. Since the number of locations increases, the inspection window is generally about φ150 mm. As a countermeasure against the above-mentioned dew condensation, it is common practice to provide heat insulation by providing an air layer with double acrylic or glass. However, moisture in the air may cause dew condensation depending on the conditions, and this is the inspection window. The inside of the plane may become invisible due to fogging.

  The present invention has been made in view of the above-mentioned problems, and the problem is that heat insulation is performed without using a foaming agent such as glass wool or urethane resin in an outer wall panel of a device having an internal / external temperature difference such as an air conditioner. Another object of the present invention is to provide an outer wall panel that has a sound insulation function and can be made thin, and can visualize the situation inside the apparatus.

In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that a net-like spacer having a thread-like member having an intersection or a knot is interposed between an outer plate and an inner plate made of a transparent material, inner distance of the gap between the plate substantially coincide with the height of the intersection or the nodules of the spacer, an air suction mechanism setting only the previous access valve having a sealing valve in the inner plate or the outer plate of the transparent material and An air conditioner having an internal / external temperature difference, characterized in that an inspection window / vacuum outer wall panel, which makes the gap substantially vacuum, is used on most of the side surfaces of the air conditioner , so that the state inside the machine during operation can be instantly understood.

According to the vacuum outer wall panel of the present invention, even in an air conditioner having a temperature difference between the inside and outside of the device, high sound insulation performance and high heat insulation performance can be obtained by the presence of the vacuum space layer, and the net-like spacer can It is easy to secure the space layer, easy to manufacture, and since the contact area between both plates of the spacer is small, the heat transfer by heat conduction is small and the heat insulation performance is high.
Moreover, it is not necessary to provide a separate inspection window by using a transparent material for the most part of the side surface of the air conditioner instead of a partial location as in the conventional inspection window, and making it a vacuum outer wall panel that also serves as an inspection window. Since the intermediate layer of the pair of transparent plates is vacuum, it does not cloud due to condensation, and can be thin without being bent structurally, and the area of the transmissive panel portion can be easily increased. A portion that cannot be seen from the outside of the machine can be visualized without considering condensation or heat radiation, and a foaming agent such as glass wool or urethane resin is not required, and the outer wall panel can be made thin .
In particular, when used on the outer wall panel of an air conditioner, the panel itself is not fogged, there is little dew condensation on the device, and you can instantly see the humidification status of the equipment and the rotation status of the fan runner, etc. The state of the machine can be seen at a glance, and maintenance is greatly improved.

An embodiment in which a suitable vacuum window panel for inspection window according to the present invention is applied to an air conditioner will be described with reference to the drawings.
FIG. 1 shows the appearance of an air conditioner. A packing 11 (see FIG. 2) and a mounting frame 12 (see FIG. 2) are provided along the outside of the casing 1 of the air conditioner. A vacuum outer wall panel 2, 2 a that also serves as an inspection window and a conventional sandwich exterior panel 3 are attached to a part of the front surface and the side surface.
The cross section of the structure of the vacuum outer wall panel 2a will be described with reference to FIG. 2. The vacuum outer wall panel 2a is fixed to the mounting frame 12 by using a fixing member 13 having a front end locking member 131, but the vacuum outer wall panel 2a (2) A substantially U-shaped end cover member 21 is fitted to the edge, and is in close contact with the mounting frame 12 via the packing 11 to improve airtightness and block air inside and outside.

In the vacuum outer wall panel 2a, an acrylic transparent outer plate 22 and a transparent inner plate 23, which are transparent materials, are provided at a distance h, and a spacer 4 is inserted in the gap (see FIG. 3). Is a vacuum, and a spacer 4 is inserted so that the plates 22 and 23 are not curved and approached. The spacer 4 is a net-like shape knitted or woven from a thread-like member 41 (see FIG. 3) made of stainless steel wire. The height h ′ of the nodal portion or the intersection portion is set so that the above-described transparent outer plate 22 and the transparent inner plate 23 substantially coincide with the distance h. It is. Accordingly, the distance h of the gap in the vacuum space A is ensured by the spacer 4 as shown by the one-dot chain line portion B (the knot portion 42) in FIG.
The size of the net-like eyes 43 (see FIG. 3) of the spacer 4 is arbitrary. However, if the size of the extra meshes is made fine, the net becomes obstructive and the inside of the device becomes difficult to see. The part which contacts the transparent inner board 23 increases, and it becomes easy to conduct internal and external heat, and heat insulation performance will fall. On the other hand, since the spacer function is lost when the eyes are enlarged, the size of the eyes of the net may be set to an appropriate size that does not make it difficult to see the inside.
Further, the knot type net as shown in FIG. 3 (a) does not move the knot portion, the spacer 4 can be easily incorporated, and the heat insulation efficiency is in view of the contact range of the transparent outer plate 22 and the transparent inner plate 23. good. On the other hand, a woven net of a type that simply crosses as shown in FIG. 3B is simple and inexpensive to manufacture, but the knot portion 42 is easy to move, and the transparent outer plate 22 and the transparent inner plate 23 are in contact with each other. The range is slightly wider.
In this embodiment, an acrylic plate is used as a transparent material for the vacuum outer wall panel 2, but glass, PET, polycarbonate or the like may be used, and the thread-like member is made of stainless steel with emphasis on corrosion resistance, but may be a resin.

  An airtight frame member 24 having a thickness h for forming the vacuum space A is provided on the inner side of the periphery of the transparent outer plate 22 and the transparent inner plate 23 of the vacuum outer wall panels 2 and 2a. The plates 22 and 23 and the frame member 24 are hermetically bonded to each other. Further, the air suction mechanism 5 for forming the vacuum space A is provided in the transparent inner plate 23. As shown in FIG. 2, a communication hole 25 for communicating the vacuum space A with the outside is provided at an appropriate position of the transparent inner plate 23. An access valve mounting base 51 having a suction hole 511 coaxial with the communication hole 25 is adhered and fixed to the outside of the transparent inner plate 23 in this portion, and a female screw portion 512 is provided on the outer side of the access valve mounting base 51. A male screw portion 521 at the tip of an access valve 52 having a sealing valve by sucking air is screwed into the female screw portion 512. In order to evacuate the vacuum space A, a vacuum pump (not shown) is connected to the access valve 52 to suck air and hold it in a vacuum state.

A method of manufacturing the vacuum outer wall panels 2 and 2a will be described with reference to FIG.
First, a communication hole 25 is cut at a proper position on a transparent acrylic transparent inner plate 23, and an access valve mounting base 51 is airtightly fixed to the outer opening of the communication hole 25 with an adhesive or the like. The male screw portion 521 at the tip of the access valve 52 is screwed into the female screw portion 512 of the mounting base 51. An airtight frame member 24 is hermetically fixed with an adhesive so as to fit the outer periphery of the transparent inner plate 23, and the spacer 4 is not fixed with an adhesive or the like, but is placed in the frame of the frame member 24, and transparent The transparent outer plate 22 made of acrylic is covered, and the outer periphery of the transparent outer plate 22 and the frame member 24 are hermetically fixed with an adhesive.
In order to make the space formed by both the plates 22 and 23 and the frame member 24 a vacuum space A, as described above, a vacuum pump (not shown) is connected to the access valve 52 to suck air and evacuate it. However, after the vacuum outer wall panel 2 is assembled and completed in the air conditioner as shown in FIG. 1, the vacuum outer wall panel 2 may be vacuumed and sealed with a one-way sealing valve built in the access valve 52. And outgas is emitted from the surfaces of the transparent outer plate 22 and the transparent inner plate 23 made of acrylic, and this is the same even in the case of a metal plate, but the degree of vacuum gradually decreases with time. . In that case, the degree of vacuum can be restored by attaching a vacuum pump to the access valve 52 and sucking it again.

  By the way, as shown in FIG. 4 and FIG. 1, the vacuum outer wall panel 2 can be attached as a substitute for the conventional outer plate of the air conditioner, but the usage method is as shown in FIG. 4 (a). 1 may be used as the vacuum outer wall panel 2a on the side surface and the door 2b on the front surface in FIG. 1, as shown in FIG. 4 (b). 1 may be used like the inspection window 2c in FIG.

As described above, according to the embodiment of the vacuum outer wall panel 2 of the present invention, the presence of the vacuum space A layer can provide high sound insulation performance and high heat insulation performance equivalent to or higher than glass wool. , And the vacuum space A is sucked into a vacuum, but when the vacuum is reached, the transparent acrylic acrylic plates 22 and 23 are directly pressed by the net-like spacer 4 even if they are pushed to atmospheric pressure. Since there is no contact, a vacuum space A layer exists between the transparent material and prevents heat transfer due to conduction and convection. In addition, heat insulation performance can be further improved by applying a known energy saving film or coating the acrylic surface with a special metal to reduce heat radiation.
Further, since the vacuum outer wall panel 2 of the present invention can secure the vacuum space A layer only by inserting the spacer 4, it is easy to manufacture and the net-like spacer 4 and the two plates 22, 23 Since the contact area is small, heat transfer due to conduction is small, and the heat insulation performance is not lowered.
In addition, since the intermediate layer of the pair of transparent plates is vacuum, it does not cloud due to condensation, and can be thin without being curved in structure, so the area of the transmissive panel portion can be easily increased, A part that cannot be seen from outside the machine can be visualized without considering condensation or heat dissipation depending on normal heat insulating material or steel plate, and no foaming agent such as glass wool or urethane resin is required, and the outer wall panel is made thin. The size of the device can be reduced.

As in this embodiment, when used for the outer wall panel of an air conditioner, a large field of view is obtained by using a transparent material for most of the side surface of the air conditioner, not a partial location like a conventional inspection window. The vacuum outer wall panel can also be used as an inspection window. Naturally, there is no need to provide a separate inspection window. Furthermore, because of its high heat insulation performance, even in an air conditioner where there is a temperature difference between the inside and outside of the device, the panel itself does not fog up, condensation does not occur in the internal equipment, the internal humidification situation, the fan runner's You can have a quick view of the rotation, etc., and you can see at a glance the state of the machine during operation, greatly improving maintenance.
Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired. For example, the air suction mechanism 5 is provided on the transparent inner plate 23 side in order to refresh the design, but it may be provided on the transparent outer plate 22 side so that the vacuum space A can be easily evacuated. The vacuum outer wall panel of the present invention is not a part of the conventional inspection window, but the entire surface of the outer wall panel of the air conditioner, and in some cases, most of the side surface is a transparent vacuum outer wall as in the present invention. It is good also as a panel.

An external perspective view of an air conditioner using the vacuum outer wall panel of the present invention, FIG. 1 is an enlarged cross-sectional view of the vacuum outer wall panel of FIG. FIG. 3A is a diagram of a net-like spacer having a knot portion 42, and FIG. 3B is a diagram of a net spacer having a crossing portion 42 'formed by knitting. Explanatory drawing explaining the usage form of the vacuum outer wall panel of an Example, FIG. 4 (a) made the whole the vacuum outer wall panel (2a), FIG.4 (b) made the inspection window the vacuum outer wall panel (2c). FIG.

Explanation of symbols

A ... vacuum space, B ... spacer contact part (nodule)
DESCRIPTION OF SYMBOLS 1 ... Casing, 11 ... Packing, 12 ... Mounting frame, 13 ... Adhering member,
131 ... tip locking parts,
2,2a, 2b, 2c… Vacuum outer wall panel,
21 ... end cover member, 22 ... transparent outer plate, 23 ... transparent inner plate 24 ... frame member, 25 ... communication hole,
3 ... Sandwich outer panel,
4 ... spacer, 41 ... stainless steel wire (thread-like member),
42 ... Nodule, 42 '... Intersection, 43 ... Net-shaped eyes,
5 ... Air suction mechanism,
51 ... Access valve mounting base, 511 ... Suction hole, 512 ... Female thread part,
52 ... Access valve, 521 ... Male thread,

Claims (1)

Between the outer plate and the inner plate of the transparent material, a thread-shaped member interposes a net-like spacer having an intersection or a knot, and the distance between the outer plate and the inner plate is set to the intersection or knot of the spacer. substantially coincide with the height of parts, the air conditioner inspection window combined vacuum outer wall panels to a substantially vacuum air suction mechanism to set only before Symbol clearance access valve having a sealing valve in the inner plate or outer plate of transparent material An air conditioner having an internal / external temperature difference, characterized in that it is used for most of the side face of the machine and is capable of instantly knowing the state of the machine during operation.

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