JPH0440116Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a radiant panel type air conditioner that cools or heats air by means of radiation from a radiant panel.

(Prior Art) An example of a conventional radiant panel type air conditioner is shown in FIGS. 4 to 6.

This radiant panel type air conditioner consists of an indoor unit and an outdoor unit, and the indoor unit 111 is installed on the ceiling of the room 100 as shown in FIG. 4, and the outdoor unit 112 is installed outdoors.

Fig. 5 shows a refrigerant circuit diagram, and during cooling operation,
The refrigerant compressed by the compressor 101 passes through the four-way valve 102 to the outdoor heat exchanger 1, as shown by the solid arrow.
03, where it condenses and liquefies by dissipating heat. After the liquid refrigerant is depressurized by the expansion mechanism 104, it passes through resistors 105, 106, 107 and enters the plurality of radiant panels 108, 109, 110, where it evaporates. At this time, the surface of the radiation plate of each radiation panel is cooled, and the surrounding area is cooled by the radiation. The refrigerant evaporated in each radiant panel is sucked into the compressor 101 through the four-way valve 102.

Since the four-way valve 102 is switched during heating operation, the refrigerant discharged from the compressor 101 circulates as shown by the broken line arrow.

FIG. 6 shows a partial cross-sectional view of the radiant panel, and when the refrigerant flows through the tubes 114, cold or warm heat is transferred from the tubes 114 to the radiant plate 113 directly or via the heat transfer plate 115. As a result, the radiation plate 113 is cooled or heated, and cold or hot heat is radiated from its surface to its surroundings. 116 is a heat insulating material, and the radiation plate 11
3 prevents heat from escaping behind it.

(Problems to be Solved by the Invention) In the above conventional air conditioner, when the surface of the radiant plate 113 of each radiant panel is cooled to below the dew point temperature of the indoor air during cooling operation, this surface There was a problem in which moisture in the air condensed and the condensed water dripped, staining the room.

(Means for Solving the Problems) The present invention was proposed to solve the above problems, and its gist is to provide a radiation plate made of a porous material having ultra-fine pores. The radiant panel type air conditioner is characterized by comprising a radiant panel forming a circulation path for circulating a temperature-controlled hygroscopic medium behind the radiant panel.

(Function) Since the present invention has the above configuration, during cooling operation, when the cooled hygroscopic medium flows through the circulation path formed behind the radiant plate, it cools the radiant plate and cools the surface of the radiant plate. radiates cold heat from. When condensed water adheres to the surface of the radiant plate, a water vapor partial pressure difference occurs between this condensed water and the medium in contact with the back surface of the radiant plate, and this acts as a driving force, causing the condensed water to flow through the ultra-fine holes of the radiant plate. It reaches the back side and is absorbed into the hygroscopic medium.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 and 2.

In FIG. 1, a radiant panel 1 is installed on the ceiling of a room, and a radiant plate 2 is attached to the lower part of the panel. This radiation plate 2 is made of a hydrophilic porous material having ultra-fine pores of several tens of angstroms (A°) or less, and this surface faces the interior of the room, and behind it is a hygroscopic material such as 90% ethylene glycol. A circulation path 3 is formed through which the medium flows. Note that the upper surface and side surfaces of this radiant panel 1 are covered with a heat insulating material (not shown). 4 is a brine tank in which a hygroscopic medium 5 is stored, and an evaporation tube 6 and a heater 1 are installed in this medium 5.
3 is immersed in the brine tank 4, and a vent hole 7 is provided at the top of the brine tank 4. Then, the medium 5 in the brine tank 4 is extracted by driving the brine pump 8.
enters the radiant panel 1 through the radiant plate 2
Brine tank 4 again via the circulation route 3 behind the
circulate within.

During cooling operation, the refrigerant gas compressed by the compressor 9 enters the condenser 10, where it radiates heat to the outside air sent by the blower 11 and is condensed and liquefied. When this refrigerant liquid passes through the expansion mechanism 12, it is throttled and adiabatically expanded, and then enters the evaporation tube 6, where it evaporates and vaporizes by cooling the medium 5 outside the tube as it flows through the tube. , after which it is sucked into the compressor 9 again. The medium 5 cooled in the brine tank 4 is sent into the radiant panel 1 by the brine pump 8, and cools the radiant plate 2 in the process of flowing through the circulation path 3. When the radiation plate 2 is cooled, cold heat is radiated from the surface of the screen, cooling objects and people in the room. In addition, since the radiation plate 2 is made of a porous material having ultra-fine pores of several tens of angstroms,
The medium in the circulation path 3 does not leak out through the ultra-fine pores.

When the radiant plate 2 is cooled and its surface drops below the dew point temperature of the indoor air, moisture in the indoor air condenses and adheres to this surface. As shown in Figure 3, saturated water in the atmosphere exhibits a water vapor partial pressure of approximately 9 mmHg at 10°C, whereas 90% concentration ethylene glycol only exhibits a water vapor partial pressure of approximately 3.8 mmHg at 10°C. Therefore, a water vapor partial pressure difference occurs between the condensed water adhering to the surface of the radiation plate 2 and the medium 5 in contact with the back surface of the radiation plate 2, and this becomes a driving force, causing the dew condensation to radiate as shown in Figure 2. plate 2
The liquid enters the circulation path 3 through the ultra-fine pores 2a and is absorbed into the medium 5.

Therefore, no condensed water drips into the room from the surface of the radiation plate 2.

Note that when the concentration of moisture contained in the medium 5 increases, the heater 13 is energized to heat the medium 5 to evaporate the moisture and release it from the air hole 7.

(Effects of the invention) In this invention, a circulation path for circulating a temperature-controlled hygroscopic medium is formed behind the radiation plate made of a porous material having ultra-fine pores, so that it is not cooled during cooling operation. When the hygroscopic medium flows through the circulation path formed behind the radiant plate, it cools the radiant plate and radiates cold heat from its surface. When condensed water adheres to the surface of the radiant plate, a water vapor partial pressure difference occurs between this condensed water and the medium in contact with the back surface of the radiant plate, and this acts as a driving force, causing the condensed water to flow through the ultra-fine holes of the radiant plate. It reaches the back side and is absorbed into the hygroscopic medium.

In this way, the condensed water adhering to the surface of the radiant plate will not drip into the room and contaminate it.
Moreover, it becomes possible to dehumidify the moisture in the indoor air.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention,
FIG. 1 is a schematic system diagram, and FIG. 2 is a partially enlarged sectional view of the radiation plate. FIG. 3 is a diagram showing the relationship of water vapor partial pressure to moisture and medium temperature. Figures 4 to 6 show an example of a conventional radiant panel type air conditioner, Figure 4 is an explanatory diagram showing its installation procedure, Figure 5 is a refrigerant circuit diagram, and Figure 6 is a portion of the radiant panel. FIG. Radiant panel...1, Radiant plate...2, Ultra-fine holes...2a, Medium...5, Circulation path...3.

Claims (1)

[Scope of utility model registration request] A radiant panel type air conditioner comprising a radiant panel formed by forming a circulation path for circulating a temperature-controlled hygroscopic medium behind a radiant plate made of a porous material having ultra-fine pores. Machine.