JPS6349623Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a ceiling-embedded air conditioner that is embedded in the ceiling and performs cooling and heating.

Conventional configuration and its problems In conventional air conditioners, a blower is operated to remove frost during defrost operation during heating. Cold air was being blown out. For this reason, there is a technique for stopping the blower, but in this case, the air in the air-conditioned room is not sent to the evaporator, and the defrost time is lengthened because the defrost is removed by natural convection. Especially in ceiling-mounted air conditioners, when the blower is stopped,
Due to the structure, there was little convection within the main body, so the defrost time tended to be longer.

Purpose of the invention In order to solve the above-mentioned drawbacks, the present invention aims to shorten the defrost time by operating an air blower during the defrost operation, and to prevent cold air from being discharged into the air-conditioned room.

Structure of the invention In order to achieve this objective, the present invention provides an opening for discharging air into the attic space in addition to the air discharge opening inside the air-conditioned room of a ceiling-embedded air conditioner. By providing a damper to discharge cold air only into the attic space, defrost time is shortened and cold air is prevented from being discharged into the air-conditioned room.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a ceiling-embedded air conditioner main body that is buried in an attic space 3 of an air-conditioned room 2. As shown in FIG.
The lower surface of the main body 1 is exposed to the air-conditioned room 2, and has an air intake port 4 at the center of the lower surface, and air discharge ports 5a on the left and right sides thereof.
5b.

Inside the main body 1, an inverted U-shaped air path 6 is formed from the air inlet 4 to the left and right air outlets 5a, 5b, and a blower 8 is disposed facing the air inlet 4. The discharge air path from this blower 8 is a horizontal portion 7a.
and a vertical part 7b, and a horizontal part 7a has a heat exchanger 9 which functions as an evaporator during cooling and a condenser during heating.
a and 9b are arranged. 10a and 10b are dew pans that house the heat exchangers 9a and 9b. On the other hand, the U-shaped cabinet constituting the main body 1 has an attic space 3 and a discharge air passage (horizontal part 7a, vertical part 7
Apertures 11a, 11b are provided to communicate with the apertures 11a, 11b, and dampers 12a, 12b are provided to open and close the apertures 11a, 11b.

That is, the dampers 12a and 12b are operated by solenoids 13a and 12b, which are energized during defrosting during heating operation.
The solenoid 13a is opened and closed by the solenoid 13b.
Actuators 13a', 13b' of 13b are connected to parts of dampers 12a, 12b via arms 14a.

Further, the depth length of the dampers 12a and 12b is approximately the same as the depth length of the discharge air passage,
In the vertical dimension, the upper part closes the openings 11a, 11b centered on the hinges 15a, 15b pivoted on the lower sides of the openings 11a, 11b, and the part below the hinges 15a, 15b closes the horizontal part 7a of the discharge air passage. The length is set to separate the vertical portion 7b from the vertical portion 7b and close the vertical portion 7b. In other words, the lower part is longer than the upper part, and is freely movable at an angle α using the hinges 15a, 15b as fulcrums. Normally, the openings 11a, 11b are completely closed by the weight of the lower part, and the solenoids 13a, 13b are energized. In the movement of the angle α according to
b, and the vertical portion 7b of the discharge air passage is completely closed.

Further, the dampers 12a, 12b have hinges 15a,
A bend of angle θ is provided at point 15b.
The openings 11a, 11a and 15b constantly generate a rotational moment due to their own weight below the hinges 15a, 15b.
This is to close the valve 11b, and during air blowing operation, additional force is applied due to wind pressure.

Next, the operation of the dampers 12a, 12b will be explained in detail.
Since they perform synchronized operations, only one will be explained.

The damper 12a is opened and closed by a solenoid 13a, and the fulcrum between the arm 14a and the damper 12a is the actuator 13 of the solenoid 13a.
The stroke l of a' causes the damper 12a to move at an angle α
This is the position that only works. The solenoid 13a is energized only during defrost during heating operation.
Damper 12a connected by arm 14a
is pulled by an angle α, closing the vertical part 7b of the discharge air channel. At the same time, by forming an opening 11a in the main body cabinet, the horizontal portion 7a of the discharge air passage communicates with the attic space 3. It is well known that when the heating operation is switched to the defrost operation, the cooling operation is started, and the cold air that has passed through the heat exchanger 9a serving as an evaporator is discharged to the attic space 3.

Therefore, the blower 11 can be operated even during the defrost operation, and cold air discharge to the air-conditioned room 2 is prevented.

Therefore, heat exchange during the defrost operation is promoted and the defrost time is shortened.

Effects of the invention As is clear from the above explanation, according to the invention, the cold air that has passed through the heat exchanger that serves as an evaporator during the defrost operation during heating can be discharged into the attic space, so the blower can be operated during the defrost operation. This can promote heat exchange and shorten defrost time. Moreover, since the cold air generated at that time is discharged to the attic space, it has the effect of preventing discomfort in the air-conditioned room.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a ceiling-embedded air conditioner according to an embodiment of the present invention, FIG. 2 is a detailed view of the damper mechanism, and FIG. 3 is a side view of the damper. 1...Main body, 3...Attic space, 4...Air intake port, 5a, 5b...Air discharge port, 11a, 11
b...Opening, 7a, 7b...Discharge air path, 12a,
12b...Damper, 8...Blower, 9a, 9b
……Heat exchanger.

Claims (1)

[Scope of utility model registration request] The main unit has an air blower and a heat exchanger that functions as a condenser for heating and an evaporator for cooling.The main unit is buried in the attic space and the bottom surface is exposed inside the air-conditioned room. In addition to arranging air discharge ports on both sides of this air intake port, a discharge air path leading from the heat exchanger to the air discharge port is provided in the main body, and the discharge air path communicates with the attic space on the side of the main body. An opening is provided, a discharge air passage is opened at the same time as the opening is closed, and a damper is provided that closes the discharge air passage at the same time as the opening is opened, and the damper is moved in a direction to open the opening during defrosting during heating operation. A ceiling-mounted air conditioner with a solenoid.