JPH0635891B2 - Air conditioner - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and cooling device that utilizes a space between a ceiling and a floor.

2. Description of the Related Art Recently, such a ceiling-embedded or ceiling-suspended indoor air conditioner is becoming the mainstream because the indoor space can be widely used.

A conventional cooling and heating device using such a space in the ceiling will be described with reference to FIG.

In FIG. 4, the indoor air conditioner 20 is embedded in the ceiling 23, and is connected to the outdoor air conditioner 21 installed outdoors by a pipe 22.

This indoor air conditioner 20 has a suction port 24 for sucking indoor air during operation.
The air was taken in from the air conditioner 20, and heat was exchanged inside the indoor air conditioner 20 to blow out cooling air from the air outlet 25 during cooling and to blow out heated air from the air outlet 25 during heating.

Problems to be Solved by the Invention In such a conventional configuration, since the room air is sucked in from the ceiling surface and the air is blown out from the ceiling surface, warm air lighter than cold air during heating operation is not generated. There is a problem in that the room air that accumulates in the upper part of the room does not circulate sufficiently and the lower part of the room, which is the actual usage space, does not have a heating effect. Further, in order to form a refrigerating cycle that enables cooling and heating operation, it is necessary to switch the direction of cooling flow, so a four-way switching valve is required. Therefore, the use of the four-way switching valve, which is very expensive, increases the manufacturing cost.

The present invention solves such a problem, and an object of the present invention is to provide an air conditioner that eliminates the unevenness of the room temperature during heating operation and does not use a four-way switching valve.

Means for Solving the Problems In order to solve this problem, the cooling and heating device of the present invention is
A ceiling ventilation path and an underfloor ventilation path are formed in the ceiling and underfloor of a room for air conditioning, and an evaporator, a condenser, and a fan for blowing air to these ventilation paths are provided on the ceiling surface. An openable / closable ceiling inlet located on the windward side of the evaporator and communicating with the ceiling ventilation path, and an openable / closable ceiling outlet located downstream of the evaporator and communicating with the ceiling ventilation path are provided. A floor inlet located on the windward side of the condenser on the floor surface and communicating with the underfloor ventilation passage, and an openable floor communicating with the underfloor ventilation passage located on the leeward side of the condenser This is a configuration in which a face outlet is provided.

Operation With this configuration, during cooling, when the refrigeration cycle operation is performed by opening the ceiling inlet and the ceiling outlet and closing the floor inlet and the floor outlet, the air in the room is sucked from the ceiling inlet, After being cooled by the evaporator, it is blown out from the ceiling outlet. In addition, during heating, if the floor inlet and floor outlet are opened and the ceiling inlet and ceiling outlet are closed to perform the refrigeration cycle operation, the indoor air is sucked from the floor inlet and heated by the condenser. After being blown, it is blown upward from the floor surface outlet. As mentioned above, when cooling, from the ceiling,
During heating, cold air and hot air are blown from the floor,
Good temperature distribution.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

In the figure, an underfloor ventilation path 17 is formed under the floor of an air-conditioned room 18, and a condenser 2 which is a heat exchanger of air to refrigerant is installed therein. A ceiling ventilation path 16 is formed in the ceiling of the room 18, and an evaporator 3 which is a heat exchanger of air to refrigerant is installed in the ceiling ventilation path 16. Each of the condenser 2, the evaporator 3, the compressor 1, and the pressure reducing mechanism 4 such as a capillary tube form a refrigeration cycle connected in series by a pipe 5.

Further, a ceiling inlet 8 and a ceiling outlet 9 which can be freely opened and closed are provided on the ceiling surface so as to be located on the windward side and leeward side of the evaporator 3, respectively. The ceiling suction port 8 and the ceiling outlet 9 communicate with the ceiling ventilation path 16. A floor inlet 10 and a floor outlet 11 that can be opened and closed are provided on the floor so as to be located on the windward side and the leeward side of the condenser 2, respectively. The floor surface suction port 10 and the floor surface outlet 11 communicate with the underfloor ventilation path 17. In addition, the ceiling ventilation path 16 and the underfloor ventilation path 17
Each of the air supply ports 12, which can be opened and closed so as to communicate with the outside,
14 and exhaust dampers 13 and 15 which are openable and closable exhaust ports
Is provided. Fans 7 and 6 are provided in the ventilation paths 16 and 17, respectively. Since only the ceiling needs to be cooled and the underfloor only needs to be heated, the four-way switching valve for switching the flow of the refrigerant is not necessary in the refrigeration cycle of this embodiment.

Next, how to perform cooling, heating, and ventilation under the above-described refrigeration cycle configuration will be described.

FIG. 1 is a sectional view of a house showing an air flow and a refrigeration cycle during cooling.

In the figure, during cooling, the high-pressure refrigerant discharged from the compressor 1 flows to the condenser 2 under the floor and exchanges heat with the outdoor air. The outdoor air is sucked by the floor fan 6 from the floor air supply port 14 which is openable and closable in the floor, and is discharged outside the room through the floor exhaust damper 15 which exchanges heat with the condenser 2 and is openable and closable. It Further, the high-pressure refrigerant that has exited the condenser 2 is decompressed by the decompression mechanism 4
After depressurizing, it becomes a low-pressure refrigerant, flows into the evaporator 3 in the ceiling, and exchanges heat with indoor air. This room air is
It is sucked by the ceiling fan 7 from the openable / closable ceiling surface inlet 8 provided on the ceiling surface, exchanges heat with the evaporator 3, and is blown out into the room as cooling air from the openable / closable ceiling surface outlet 9.

At this time, the ceiling air supply port 12, the ceiling exhaust damper 13, the floor surface suction port 10, and the floor surface air outlet 11 are closed.

FIG. 2 is a sectional view of the house showing the air flow and the refrigeration cycle during heating.

In the figure, during heating, the high-pressure refrigerant discharged from the compressor 1 flows to the condenser 2 in the underfloor and exchanges heat with indoor air. This indoor air is provided on the floor and can be opened and closed freely by the floor suction port 10.
Is sucked in by the floor fan 6 and heat is exchanged in the condenser 2, and is blown into the room as heat-exchanged heated air from the openable / closable floor surface outlet 11. Further, the high-pressure refrigerant that has exited the condenser 2 becomes a low-pressure refrigerant after being decompressed by the decompression mechanism 4, flows into the evaporator 3 in the ceiling, and exchanges heat with the outdoor air. This outdoor air is sucked by the ceiling fan 7 from the openable / closable ceiling air supply port 12 provided in the ceiling, exchanges heat with the evaporator 3, and is exhausted to the outside through the openable / closable ceiling exhaust damper 13. It is a thing.

At this time, the top surface suction port 8, the top surface outlet 9, the floor air supply port 14, and the floor exhaust damper 15 are closed.

FIG. 3 is a sectional view of the house showing the air flow during ventilation.

In the figure, during ventilation, while the compressor 1 is stopped, outdoor air is supplied from the floor fan 6 through the floor air supply port 14 provided in the floor.
Are sucked in, pass through the condenser 2 without heat exchange, and are blown out from the floor outlet 11 provided on the floor surface.
At the same time, the indoor air is sucked by the ceiling fan 7 from the ceiling inlet 8 provided on the ceiling, passes through without heat exchange in the evaporator 3, and the ceiling exhaust damper 13 provided in the ceiling. Exhaust to the outside through the.

As described above, according to the present embodiment, the ventilation of the room can be performed by providing the air supply port and the air exhaust port in the ceiling ventilation path 16 and the underfloor ventilation path 17, respectively. Therefore, it can be used all year round, not only in summer and winter.

As described above, according to the present invention, during cooling, room air can be sucked in from the ceiling surface, and cooling air can be blown out from the ceiling surface.In addition, during heating, room air can be sucked in from the floor surface. Being able to blow out of the floor allows cold air to flow from top to bottom and warm air to flow from bottom to top. Therefore, the indoor air can be sufficiently circulated, and a good indoor temperature distribution can be obtained.

Further, in order to form a refrigeration cycle that enables air-conditioning operation, a four-way switching valve is usually used, but in the present invention, it is not necessary to use a four-way switching valve, and it also has the advantage of reducing manufacturing costs. Is.

[Brief description of drawings]

FIG. 1 is a sectional view of a house showing a cooling operation state of an air conditioning heating and ventilation system according to an embodiment of the present invention, FIG. 2 is a sectional view of a house showing the heating operation state, and FIG. 3 is a ventilation operation state of the same. FIG. 4 is a sectional view of the house, and FIG. 4 is a sectional view of the house when the ceiling-embedded air conditioner according to the conventional example is attached to the ceiling. 1 ... Compressor, 2 ... Condenser, 3 ... Evaporator, 4 ... Decompression mechanism, 5 ... Piping, 8 ... Top inlet, 9 ... Top outlet, 10 ... Floor Suction port, 11 ... Floor air outlet, 12
...... Ceiling air supply port, 13 ...... Ceiling exhaust damper, 14 ......
Floor air inlet, 15 ... Floor exhaust damper, 16 ... Ceiling ventilation path, 17 ... Underfloor ventilation path.

Claims (4)

[Claims] 1. A ceiling ventilation path and an underfloor ventilation path are formed in a ceiling and an underfloor of a room for air conditioning, respectively, and an evaporator and a fan for blowing the evaporator are provided in the ceiling ventilation path, and the underfloor ventilation path is provided. Is equipped with a condenser and a fan to blow air into it.
The ceiling surface is located on the windward side of the evaporator and can be opened and closed by communicating with the ceiling ventilation passage, and the opening and closing can be opened and closed by the ceiling, which is on the leeward side of the evaporator and can communicate with the ceiling ventilation passage. An air outlet is provided, and the floor is located on the windward side of the condenser and is openable and closable in communication with the underfloor ventilation passage, and is located on the leeward side of the condenser. An air conditioner with a floor outlet that can be opened and closed in communication with. 2. The cooling and heating apparatus according to claim 1, wherein each of the ventilation paths is provided with an air supply port and an exhaust port which communicate with the outside of the room and can be opened and closed. 3. The floor inlet and outlet are closed during cooling, the ceiling inlet and outlet are opened, and during heating, the inlet and outlet are opened and closed in opposition to cooling. The heating / cooling device according to claim 1. 4. When cooling, the air supply port and exhaust port of the ceiling ventilation path and the floor suction port and the floor air outlet are closed, and the air supply port and exhaust port of the underfloor ventilation channel and the ceiling suction port and ceiling air outlet are opened. , A patent that is configured to open and close the air supply port, the air exhaust port, the air intake port, and the air outlet when heating, and to close only the air outlet, the air supply port, and the floor air outlet of the ceiling ventilation path during ventilation The cooling and heating device according to claim 2.