JPH02254236A - Air conditioner set in ceiling - Google Patents

Abstract

PURPOSE:To prevent dew condensation on the outer surface of a body of casing set in a ceiling by forming in an inner casing, at a position facing an outlet for the air from a fan, an opening communicating with a passage for air. CONSTITUTION:An air inlet 8 is formed in the middle in a panel 7 provided on the underside of a ceiling board 5 and an air outlet 9 on the outer side of the air inlet 8. Inside an inner casing 3 a fan assembly 10 is placed close to the air inlet 8 and between the inner casing 3 and the fan assembly 10 are placed heat exchangers 11. The inner casing 3 has an opening 12 at a position where this opening 12 faces an air outlet 10a of the fan assembly 10; the opening 12 communicates with an air passage 4. In this manner a body of casing 1 is formed in a double structure comprising an outer casing 2 and the inner casing 3 and, by passing primary air through the air passage 4 formed between the outer casing 2 and the inner casing 3, the body of casing 1, which is located above the ceiling board, can be made free from dew condensation on its outer surface. By sending primary air together with secondary air into the room, it is also prevented for dew to be formed near the air outlet 9 in the panel and for the secondary air to stay stagnant near the surface of the ceiling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a ceiling-embedded air conditioner that prevents dew from forming on the outer surface of a casing located in the ceiling.

(Prior Art) This type of ceiling-embedded air conditioner has a housing with a downward opening, an air inlet in the center and an air outlet on the outside, which are arranged to cover the opening of the housing. panel and
It has a fan device placed close to the air suction port in the housing and a heat exchanger placed between the fan device and the inner box, and the fan is installed from the air suction port of a panel placed on the ceiling. The air sucked in by the device is guided to a heat exchanger, and the air heat-exchanged here is blown out from the air outlet of the panel.

(Problem to be Solved by the Invention) In the ceiling-mounted air conditioner of the above type, when operating in hot and humid conditions such as in summer, a large amount of Condensation may occur, and this dew may flow and cause stains on the ceiling surface, or may drip and stain displayed products or the floor surface, or may come into contact with users and cause discomfort.

The present invention has been made in view of the above-mentioned points, and the casing has a double structure of an outer box and an inner box, and the primary air is flowed through the air passage formed between the outer box and the inner box. An object of the present invention is to provide a ceiling-mounted air conditioner that prevents dew from forming on the outer surface of a casing located in the ceiling.

[Structure of the invention]

(Means for Solving the Problems) A ceiling-embedded air conditioner of the present invention includes a downward-opening casing that has a double structure of an outer box and an inner box and has an air passage between the outer box and the inner box; A panel having an air inlet in the center and an air outlet on the outside and arranged to cover the opening of the casing and forming an air outlet between it and the outer box, and a panel inside the inner box.
(ii) A fan device disposed near the air suction port and a heat exchanger disposed between the fan device and the inner box, and the above-mentioned It is configured with an opening connected to the air passage.

(Function) In the ceiling-embedded air conditioner of the present invention, most of the air sucked in by the fan device from the air suction port of the panel arranged on the ceiling is guided to the heat exchanger, where the air is heat exchanged. The air is blown out from the air outlet of the panel, and the air is formed between the outer box and the inner box through an opening provided at the part opposite to the air outlet of the fan device in the inner box. The passage allows primary air to flow through the air passage, thereby preventing dew condensation on the outer surface of the casing located within the ceiling.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a downward-opening casing of a ceiling-embedded air conditioner, and this casing 1 has a double structure in which an outer box 2 and an inner box 3 are connected to each other at appropriate locations via connectors. An air passage 4 is formed between the outer box 2 and the inner box 3. Further, an air outlet 6 is formed between the lower end of the outer box 2 and the lower end of the inner box 3 for blowing air out to the back side of the ceiling plate 5.

On the other hand, an air inlet 8 is formed in the center of the panel 7 arranged on the lower surface of the ceiling plate 5, and an air outlet 9 is formed outside the air inlet 8. A fan device 10 is disposed near the suction port 8, and a heat exchanger 11 is disposed between the fan device 10 and the inner box 3.

On the other hand, an opening 12 connected to the air passage 4 is formed in a portion of the inner box 3 facing the outlet 10a of the fan device 10.

The temperature measurement results of each part of the ceiling-mounted air conditioner are
As shown in the figure.

The air outside the casing is the highest, followed by primary air, primary air passing through the air passage, air inside the inner box, and secondary air that has undergone heat exchange.

When the ceiling-embedded air conditioner is operated, air is sucked in by the fan device 10 through the air suction port 8 of the panel 7 arranged on the ceiling 5, and the air is blown out from the air outlet 10g of the fan device]O. Most of the air is guided along the inner surface of the inner box 3 to the heat exchanger 11, and the heat exchanged air is blown out from the air outlet 9 of the panel 7, and some of the air is blown out from the air outlet 10a. is led to the air passage 4 formed between the outer Tu 2 and the inner box 3 through an opening 12 provided opposite to this air outlet 10a of the inner box 3, and through this air passage from the air outlet 6 to the ceiling. It is blown out on the back. The air passing through this air passage is primary air that does not undergo heat exchange, so even if it is cooled by the cooled secondary air passing through the inner box 3, the temperature is close to that of the atmosphere, and the outer box 2 is not cooled, so the ceiling Condensation does not occur on the outer surface of the housing located inside.

FIG. 3 shows another embodiment of the present invention, in which a sky viewing passageway 4 formed between an outer box 2 and an inner box 3 communicates with an air outlet 9a formed in a panel 7, Two series of air blowing flows are formed. That is, the secondary airflow 20 blown out from the air outlet 9 and the primary airflow 20 blown out from the air outlet 9a have a form in which the primary airflow 21 wraps around the secondary airflow 20, as shown in FIG. Therefore, the secondary air flow 20 does not stay near the ceiling surface, and the indoor temperature distribution is improved. Note that it is more effective to control the primary air flow 20 using a control valve as necessary.

〔Effect of the invention〕

As described above, according to the present invention, the casing has a double structure of an outer box and an inner box, and the primary air is flowed through the air passage formed between the outer box and the inner box, so that the casing is located in the ceiling. It is possible to prevent dew from forming on the outer surface of the casing, and by blowing the secondary air into the room together with the secondary air, it is possible to prevent dew condensation near the panel outlet and secondary air from stagnation near the ceiling surface.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a ceiling-embedded air conditioner according to the present invention, FIG. 2 is a diagram showing temperature changes in each part of the ceiling-embedded air conditioner, and FIG. 3 is a diagram showing another embodiment of the present invention. Figure, 4th
The figure shows the flow of air near the panel outlet. 1... Housing, 2... Outer box, 3... Inner box, 4...
Air passage, 6... Air outlet, 7... Panel, 8...
- Air intake port, 9... Air outlet, ] 0... Fan device, 12... Opening.

Claims (1)

[Claims] 1. A downward-opening casing with a double structure of an outer box and an inner box and an air passage formed between the outer box and the inner box, an air intake port in the center and an air outlet on the outside. a panel arranged to cover the opening of the casing and forming an air outlet between it and the outer box; a fan device arranged in the inner box at a position close to the air intake port; and the fan device. and a heat exchanger disposed between the inner box and the inner box, and an opening connected to the air passage is provided in a portion of the inner box facing the outlet of the fan device. Machine. 2. The ceiling-embedded air conditioner according to claim 1, characterized in that the air passage formed between the outer box and the inner box communicates with an air outlet formed in the panel to form two series of air blowing flows. Machine.