JPS60108621A - Ceiling embedded type air conditioner - Google Patents

Abstract

PURPOSE:To prevent the temperature within an air-conditioned room from lowering by introducing air in the ceiling space into the air-conditioned room at the time of defrosting operation thereby to prevent infiltration of external air into the air-conditioned room. CONSTITUTION:At the time of normal operation, openings 11a, 11b, 12a and 12b of dampers 14a and 14b are closed. At the time of defrosting operation, dampers 14a and 14b are moved to positions indicated by dotted lines by means of solenoids (not shown), lower ends of the damper 14a and 14b brought into contact with dew saucers 10a and 10b to interrupt the flow of air from the heat exchangers 9a and 9b to perpendicular parts 7a and 7b, and further openings 11a, 11b, 12a and 12b are opened. As a result, cool air from the heat exchangers 9a and 9b is discharged from the opening 11a and 11b into the ceiling space 3, and the discharge of cool air into the air-conditioned room 2 is prevented and an atmospheric pressure difference between the ceiling space 3 and the air-conditioned room is produced, and air within the ceiling space 3 flows into the air- conditioned room 2 from the openings 12a and 12b. Accordingly, infiltration of the external air into the air-conditioned room can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ceiling-embedded air conditioner that is embedded in the ceiling of an air-conditioned room and performs cooling and heating.

Conventional configuration and its problems In conventional air conditioners, during the defrost operation during heating, the indoor blower is operated to remove the frost from the outdoor heat exchanger, and the Cold air was discharged into the air-conditioned room through the discharge air path. For this reason, there is a technique to stop the indoor blower, but in this case, the air inside the conditioned room is not sent to the evaporator, and the defrost time is increased due to natural heat dissipation. Particularly in ceiling-mounted air conditioners, when the blower is stopped, the defrost time tends to be longer because there is less natural convection within the unit due to its structure. For this reason, the applicant has proposed a ceiling-embedded air conditioner as shown in FIG. This is blower a1 heat exchanger b,
b', one air outlet C9C', etc., and constitutes a main body e buried in the attic space d. In this main body e, a discharge air passage f leading to air discharge ports C and C'
, f' and openings q and cr' that communicate the discharge air passages f and f/ with the attic space d, and the damper 1 that is hinged at the opening (J, (J') and operates as the entire center of h' , l
L is provided. This damper 1. i' is a heat exchanger b which opens an opening (j l q' and closes discharge air passages f and f' during defrosting during heating operation, and serves as an evaporator).
, b' is discharged from the openings (J, (J') into the attic space d, thereby shortening the defrosting time and preventing the cold air from flowing into the air-conditioned room j. However, in this method, the blower a During operation, a large amount of outside air enters the air-conditioned room j, which has the disadvantage that the temperature of the air-conditioned room falls sharply.

Purpose of the Invention Therefore, in order to solve the above two drawbacks, the present invention introduces air in the attic space into the air-conditioned room during defrost operation, prevents outside air from entering the air-conditioned room, and reduces the temperature in the air-conditioned room. The purpose is to reduce

Structure of the Invention In order to achieve this object, the present invention provides, in addition to the air outlet inside the conditioned room of a ceiling-mounted air conditioner, a first opening for discharging air into the attic space, and a first opening for sucking air in from the attic space. Two openings are provided, and during defrosting during heating operation, a blower discharges cold air only into the attic space from the first opening, and at the same time, the second opening blows cold air into the attic space due to the pressure difference between the air-conditioned room and the attic space. By providing a damper to introduce air into the air-conditioned room, the entrance of outside air into the air-conditioned room is reduced and the drop in temperature of the air-conditioned room is reduced.

Description of examples 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 an air vent 4 is formed in the center of the lower surface, and air discharge ports sa and 5b are formed on the left and right sides thereof.

Inside the main body 1, there are air inlets 4 to left and right air outlets 5a.
, 5b, each forming an inverted U-shaped air passage 6, and a blower 8 facing the suction port 4.

The discharge air path from the blower 8 is composed of a horizontal portion 7a and a vertical portion 7b, and heat exchangers 9a and 9b are arranged in the horizontal portion a, which function as an evaporator during cooling and as a condenser during heating.

10ag10b is a dew pan that accommodates the heat exchangers 9a and 9b. On the other hand, the U-shaped cabinet constituting the main body 1 includes an attic space 3 and a discharge air passage (horizontal portion 7a,
The first openings 11a, 11b are in communication with the vertical portion 7b) and are provided at positions facing the heat exchangers 9a, 9b, and the first openings 1'111a, 111) are in communication with the air discharge ports 5a, 5b. Second openings 12a and 12b are formed so as to be located between them. These first openings 11a, 11b and the second opening q
Hinge 13a to open and close 12a and 12b.

131] is rotated with the center upper part closed.

14b is the preparation.

That is, during normal operation, the dampers 148, 14b are provided so that their upper ends close the first openings 11a, 11b, and their lower ends close the second openings 12a, 12b.During defrosting, the dampers 148, 14b are equipped with a solenoid (not shown), etc. It is rotated by the drive means of the first heat exchanger 9a, 9b to block the flow from the heat exchangers 9a, 9b to the vertical parts 7a, 7b by bringing the lower end into contact with the dew pans 10a, 10b. Second openings 11a, 11b, 12a,
12b.

With the above configuration, during defrosting during heating operation, the dampers 14a and 14b are operated, and the cold air generated by the heat exchangers 9a and 9b, which serve as evaporators, is directed from the first openings 11&, 11b to the attic space. 3 to prevent cold air from being discharged to the air-conditioned room 2, and by utilizing the pressure difference between the air-conditioned room 2 and the attic space 3 that occurs at this time, the second opening 12a,
Since the air in the attic space 3 is introduced into the air-conditioned room 2 from the air conditioner 12b, there is no drop in the air pressure in the air-conditioned room 2, which reduces the amount of outside air entering, and the temperature drop in the air-conditioned room 2 is small. Become.

As is clear from the above explanation, according to the present 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. heat exchange can be promoted and defrost time can be shortened. In addition, the cold air generated during defrosting is discharged into the attic space, and the air in the attic space is introduced into the air-conditioned room, so there is no pressure drop inside the air-conditioned room, and less outside air enters the air-conditioned room. This has the effect of reducing the temperature drop and preventing discomfort.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional ceiling-embedded air conditioner, and FIG. 2 is a sectional view of a ceiling-embedded air conditioner according to an embodiment of the present invention. 1: Main body, 2 Air-conditioned room, 3 Attic space, 11a, 11b... First opening, 12a. 12b ・Second opening, 7a, 7b...Discharge air path, 1
4a, 14b - damper, 8 - blower, 9a, 9b
··Heat exchanger. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure O If Q 2 Figure

Claims (1)

[Claims] A main body that is embedded in the attic space and has a blower, a condenser for heating, a heat exchanger that serves as an evaporator for cooling, and an air outlet facing into the room, and a main body that is embedded in the attic space, and a A discharge air passage leading to a discharge port, first and second openings communicating the discharge air passage with the inside of the attic space, and discharging cold air into the attic space through the first opening during a defrost operation during heating. and a damper that opens so that the air in the attic space passes through the discharge air path and is discharged indoors through the second opening.