JPH0714731Y2 - Panel type air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a panel type air conditioner.

(Prior Art) A radiation panel type air conditioner that circulates a temperature-controlled medium in the back of a plate is known as described in, for example, Japanese Utility Model Publication No. 1-91817. In this device, the plate is made of a porous material having a number of + Å ultrafine pores, and the medium is made hygroscopic so that the drain water condensed on the plate surface during cooling is absorbed in the medium. The drain water is prevented from dripping indoors. Further, in the above device, it is possible to prevent the drain water from dripping into the room,
To promote its absorption, the porous plate is made of a hydrophilic material.

(Problems to be Solved by the Invention) By the way, in the above-mentioned conventional example, in order to activate the absorption of drain water, it suffices to increase the pore diameter of the porous plate and reduce the plate thickness. This in turn causes the problem of leakage of the hygroscopic medium into the room. Therefore, the pore diameter of the porous plate and the plate thickness are limited from this point, and therefore, it is difficult to say that a sufficient water vapor transmission coefficient is obtained in the above-mentioned conventional example, and the plate area is reduced to obtain initial water absorption and dehumidification performance. There is the problem of having to make it larger.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object thereof is to provide a panel type air conditioner which is excellent in water absorption or dehumidification performance and therefore can be constructed compactly.

(Means for Solving the Problem) Therefore, in the panel type air conditioner according to the first aspect, the hygroscopic medium 6 is circulated from the inside of the room by circulating the hygroscopic medium 6 to the back of the porous plate 5 whose surface is arranged on the inside of the room. A panel type air conditioner for absorbing moisture, comprising the porous plate 5
Is characterized in that its surface is hydrophilic and its back surface is hydrophobic.

In the panel type air conditioner according to the second aspect, the porous plate 5 has a thickness of 1 to 100 μm and a pore diameter of
The feature is that it is 0.1 to 1 μm.

(Operation) In the panel type air conditioner according to the first aspect, since the back surface of the porous plate 5 is made hydrophobic, leakage of the medium 6 to the front surface side is less likely to occur. Therefore, for example, the second
As described in the claims, the plate thickness can be reduced and the hole diameter can be increased.

(Example) Next, a specific example of the panel type air conditioner of the present invention will be described in detail with reference to the drawings.

In FIG. 2 showing the overall configuration of the apparatus, 1 is a radiation panel,
2 is a medium tank, 3 is a medium pump, and these are connected by a medium circulation path 4. The radiation panel 1 is provided with a porous plate 5 whose surface is arranged on the indoor side, and a hygroscopic medium 6 (for example, 90% ethylene glycol, 40% lithium chloride) is provided on the back of the porous plate 5. It is now in circulation.

On the other hand, 11 is a compressor, 12 is a four-way switching valve, 13 is a first heat exchanger, 14 is a pressure reducer, and 15 is a second heat exchanger, which are connected by a refrigerant circulation path 16. There is. Then, the second heat exchanger 15 is introduced into the medium tank 2,
The medium 6 can be cooled or heated. 17
Is a drain guide.

A deaerator 20 is connected to the medium tank 2. The degassing section 20, the medium flow passage 21, the porous semipermeable membrane 22, the decompression section 23,
It comprises a vacuum pump 24.

In the above device, the medium 6 is cooled by evaporation of the refrigerant in the second heat exchanger 15, and the medium 6 is circulated from the tank 2 to the radiation panel 1 to cool the room. At this time, the drain water condensed on the surface of the porous plate 5 or about to be condensed is absorbed by the hygroscopic medium 6 after passing through the porous plate 5. The water content of the medium 6 whose concentration has decreased due to drain water absorption is removed in the degassing section 20,
The medium 6 having an excessive moisture concentration is supplied to the radiation panel 1. In the above device, the second heat exchanger 15
It is possible to perform the heating operation by utilizing the condensation of the refrigerant in the above, and at this time, it is also possible to perform the indoor humidification by using the drain water from the first heat exchanger 13.

As shown in FIG. 1 showing the radiation panel 1 in an enlarged manner, the porous plate 5 is configured by sticking a hydrophilic porous film 7 and a hydrophobic porous film 8 to each other, and Porous porous membrane 7 is arranged on the inner surface side of the surface, and the hydrophobic porous membrane 8 is arranged on the rear medium 6 side. In the above, it is preferable that the hydrophilic porous membrane 7 has a water contact angle of about 30 ° or less, and the hydrophobic porous membrane 8 has a water contact angle of about 110 ° or more. It is not limited to.

By the way, the pressure difference P required for the liquid to pass through a specific pore is given by the following equation.

P = (4σ · cosδ) / d where σ is the surface tension of the liquid, δ is the contact angle, and d is the pore diameter.

When the above equation is examined from the viewpoint of the leakage of the medium 6 from the porous plate 5, it can be said that if P and σ are constant, the larger the contact angle δ, the more the leakage can be prevented even with a large pore size. Will be revealed.

Therefore, in the above embodiment, the hole diameter of the porous plate 5 can be made larger than that of the conventional one, and from the same point, the plate thickness of the porous plate 5 can be made small.

As a result of the above, in the porous plate 5 having the above configuration, the medium 6
It is possible to increase the water vapor permeability coefficient while preventing the leakage of water, and therefore improve the water absorption or moisture absorption performance, thereby reducing the area of the porous plate 5. By the way, according to the above configuration, the porous plate 5 can have a thickness of 1 to 100 μm and a pore diameter of 0.1 to 1 μm, and it has been confirmed that good results can be obtained. By making the surface of the porous plate 5 hydrophilic, dripping of drain water can be prevented as in the conventional case. Further, in the above-mentioned embodiment, since the two porous films 7 and 8 are adhered to form the porous plate 5, there is an advantage that the strength of the porous plate 5 is improved.

Although one embodiment of the panel type air conditioner of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be carried out. For example, in the above, the porous plate 5 is constituted by sticking the two hydrophilic and hydrophobic membranes 7 and 8, but the hydrophilic and hydrophobic surfaces are formed on the front and back surfaces of one porous plate 5, respectively. It is also possible to apply a volatile substance. In the above description, the drain water absorption at the time of cooling is described as an example, but the operation may be performed only in the dehumidifying mode of indoor air.

(Effect of the Invention) In the panel type air conditioner according to the first aspect, for example, the second type
Since it is possible to increase the pore diameter of the porous plate or to reduce the plate thickness as described in the claims, it is possible to improve the water vapor permeability coefficient as compared with the conventional one, and therefore the area of the porous plate is reduced. That is, the entire device can be made compact.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a circuit configuration of an embodiment of a panel type air conditioner of the present invention, and FIG. 2 is a partially enlarged sectional view of a radiation panel thereof. 5 ... Porous plate, 6 ... Medium, 7 ... Hydrophilic porous membrane, 8 ... Hydrophobic porous membrane.

Claims (2)

[Scope of utility model registration request] 1. A panel type air conditioner which absorbs moisture from the inside by circulating a hygroscopic medium (6) to the back of a porous plate (5) whose surface is placed on the inside of the room. The panel type air conditioner characterized in that the surface of the porous plate (5) is hydrophilic and the back surface thereof is hydrophobic. 2. The porous plate (5) has a size of 1 to 100 μm.
The panel type air conditioner according to claim 1, wherein the thickness is m and the hole diameter is 0.1 to 1 μm.