JPH02171524A - Air conditioner - Google Patents

Abstract

PURPOSE:To enable a comfortable air conditioning state in a room to be attained by a method wherein a cold air blowing duct having a diffuser for blowing cold air to an upper part of a room and sucking the interior air and blowing it through the diffuser, and a hot air blowing duct defined by the rear surface part of an interior floor panel for use in blowing the heated hot air from a lower part of the room into the room are provided. CONSTITUTION:During a cooling operation, an opening or closing damper 26 closes a hot air diffuser 11, and an opening or closing damper 13 releases a cold air diffuser 10. As an air blowing fan 14 is driven, interior air is sucked through a cushion port 8 of an indoor device 2, cooled by an indoor heat exchanger 1 and flowed from the diffuser 12 at the upper part of a room downwardly. At this time, a suction port 15 is closed by a damper 16. During a heating operation, an opening or closing damper 13 closes a cold air diffuser 10, the opening or closing damper 26 is released to cause the hot air diffuser 11 to communicate with the hot air blowing duct 4, thereby an air blowing fan 25 is rotationally driven. Interior air is sucked through a suction port 8 of the indoor device 2, heated by the indoor heat exchanger 1, guided to the hot air blowing duct 4 and then blown from the diffuser 22 into the room. The hot air heated by the heat exchanger 1 may heat the floor panel 20 and the interior part is heated by radiation heat.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an air conditioner, and particularly to a built-in type air conditioner in which an indoor unit is formed integrally with an indoor structure. , relates to an air conditioner that can optimally perform heating and cooling.

(Prior Art) Generally, a built-in type air conditioner is known, which is embedded and built into an indoor structure, for example, an indoor wall.

Specifically, when this built-in type air conditioner has an outdoor unit and an indoor unit separated, the indoor unit is installed and built into the indoor wall or the like. By incorporating the indoor unit into the indoor wall and installing it as an integral part, the indoor unit does not protrude into the room, improving the decorative quality of the room and making effective use of the indoor space. In recent years, they have been increasingly adopted in newly built houses due to their improved indoor functionality. A conventional built-in type air conditioner has an indoor unit simply integrated into an indoor wall or the like and installed therein. In the indoor unit, an air outlet is formed at the upper part of the indoor unit, and a suction opening is formed relatively close to the lower part of the indoor unit.

(Problem to be solved by the invention) By the way, during cooling operation, by blowing cold air downward from the upper part of the room, the room can be evenly cooled. It is desirable to provide it at the top of the

Therefore, in conventional built-in type air conditioners, the air outlet is located above the indoor unit, and the indoor unit is built into the indoor wall or the like. It is true that by installing the indoor unit with the air outlet located at the upper part of the room, the room can be effectively cooled during cooling operation.

On the other hand, heating the air conditioner means blowing out warm air heated by the indoor heat exchanger from the air outlet. By the way, when warm air or warm air is blown out from the air outlet located at the top of the room, the hot air that is blown out rises to the top of the room and does not flow to the bottom or floor of the room, which means that the air is heated under the feet during heating. The downside was that it was cold.

The solution to this problem was to increase the amount of air blown by the fan in order to circulate the warm air blown out from the air outlet evenly throughout the room during heating.

Increasing the amount of air blown as described above has the problem that the blowing fan rotates at high speed, which causes noise from the fan and wind noise due to the wind passing through the louvers of the outlet.

In addition, as mentioned above, heating by an air conditioner is achieved by blowing out warm air or warm air from the outlet, and a draft (airflow) flows inside the room.
Increasing this level with a blower fan has the problem of causing discomfort.

The present invention has been devised to effectively solve the problems of conventional built-in air conditioners.

The first purpose is to spread Wl and WU along the indoor floor during heating.
To provide an air conditioner that can minimize warm air flow (draft), achieve heating by radiant heat, and achieve comfortable indoor air conditioning.

A second object of the present invention is to provide an air conditioner in which a circulator can be configured using a cold air blowing duct, and indoor air can be easily circulated during heating operation.

[Configuration of the Invention (Means for Solving the Problems) To achieve the above object, the present invention provides an indoor unit provided at the lower part of the room and having an indoor heat exchanger for cooling or heating indoor air. It has an air outlet connected to this indoor unit and extends upward along the indoor wall to blow out cool air to the upper part of the room, and has a blower fan on the side of the air outlet, and has a blower fan upstream of the blower fan. On the side is a cold air blow-off duct which constitutes a circulator that sucks indoor air into the interior and blows it out from the above-mentioned outlet, and a cold air blow-off duct that is connected to the above-mentioned indoor unit and passes heated air through the back side of the indoor floor and then flows from the lower part of the room into the room. The hot air blowing duct is partitioned by the back side of the indoor floor panel to blow hot air to the inside of the room.

(Function) With the above configuration, during cooling operation, the room can be accurately cooled by blowing cold air from the upper part of the room into the room from the cold air blow-off duct, and during heating operation, hot air after heat exchange can be sent through the warm air blow-off duct. By blowing out air, the indoor floor panel is heated, and the room is heated by radiant heat.

In addition, the cold air Suita duct is formed by extending in the height direction or upward along the indoor wall, and has a circulator that sucks indoor air into this duct and blows it out from the outlet of the duct, so that the cold air is blown out during heating operation. Ducts allow indoor air to be circulated.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

As shown in FIGS. 1 and 2, the indoor unit of the built-in type air conditioner is formed by an indoor unit 2 that houses an indoor heat exchanger 1 and an indoor unit 2 that extends above the indoor unit 2. It is mainly composed of a cold air blowing duct 3 and a warm air blowing duct 4 connected to the lower part of the indoor unit 2.

The indoor unit 2 and the cold air blowing duct 3 are constituted by a continuous housing 5 and are embedded and installed in an indoor wall 6. Indoor unit 2 is installed on indoor wall 6
A suction port 8 having a suction grille is formed in the front panel 7 of the vehicle. In addition, an indoor heat exchanger 1 is provided inside the indoor unit 2, located on the back side of the front panel 7, and the back side of the indoor heat exchanger 1 is used for blowing out air after heat exchange. A blowout passage 9 is formed. This blowout passage 9
are connected to a cold air outlet 10 formed in the upper part of the indoor unit 2 and a warm air outlet 11 provided in the lower part thereof. A cold air blowing duct 3 formed integrally and continuously with the indoor unit 2 is connected to the cold air blowing outlet 10. As shown in the figure, the cold air blowing duct 3 extends from the indoor unit 2 provided at the lower part of the room in the height direction along the indoor ri6, and has a blowing outlet 12 having a blowing grill near the ceiling. There is. An opening/closing damper 13 is provided at the cold air outlet 10 of the indoor unit 2 on the upstream side of the cold air blowing duct 3. Further, this duct 3 is provided with a blower fan 14 on the side of the air outlet 12. The cold air blow-off duct has a suction port 1 in the middle for sucking indoor air.
5, and a circulator damper 16 for opening the suction port 15 when the upstream side of the suction port 15 is closed. That is, as shown in FIG. 2, the circulator is integrated into the cold air blowing duct 3 by providing the suction port 15 in the cold air blowing duct 3 and providing a damper 16 that opens and closes the suction port 15 and at the same time opens and closes the upstream side of the tact. It will be configured as follows. A ventilation opening 18 is formed in the outdoor wall 17 that partitions the back side of the cold air blowing duct 3 constituting this circulator.
is provided. The indoor side of the cold air blowing duct 3 is defined by a housing 5 that is continuous with the indoor unit 2, and the back surface thereof is defined by an outdoor wall 17. Also, an outdoor wall 17 that partitions the cold air blowing duct 3
insulation material is installed.

As shown in the figure, the -m wall of the warm air blowing duct 4 is partitioned by an indoor floor panel 20, and the warm air or warm air from the indoor unit 2 flows along the back side of the floor panel 20. That is, the warm air blowing duct 4 is configured to form a predetermined gap between the floor panel 20 and the floor plate 21 below it, and is connected to the warm air blowing outlet 11 of the indoor unit 2. Further, the warm air blowing duct 4 partitioned by the floor panel 20 has a blowing outlet 22 formed at the lower part of the indoor wall on the side opposite to the indoor unit 2. A blowout grill 23 is housed in the blowout port 22, as shown in FIG. In particular, the warm air blowing duct 4 is configured so that warm air flows across the entire back surface of the floor panel 20.

Further, the indoor floor panel 20 is made of a material with excellent thermal conductivity, and a heat insulating material 24 is laid along the floor plate 21. The warm air blowing duct 4 is provided with a blowing fan 25 on its blowing side. On the other hand, an opening/closing damper 26 is provided at the warm air outlet 11 on the upstream side of the duct 4.

A damper opening/closing control circuit is connected to the opening/closing damper 26 and the opening/closing damper 13 provided in the cold air blowing duct 3 so that the opening/closing operation is performed in synchronization with the cooling or heating operation control of the indoor unit 2.

Separately from this damper opening/closing control circuit, a control circuit for driving the opening/closing of the circulator damper 16 is provided in the control section of the indoor unit 2.

Next, the indoor heat exchanger 1 housed in the indoor unit 2 constitutes a refrigeration cycle shown in FIG. 3. As shown in the figure, this refrigeration cycle consists of a compression R27 controlled by an inverter, an outdoor heat exchanger 28, an expansion valve 29, and a compression R27 controlled by an inverter.
It is comprised of a four-way valve 30 for switching the refrigerant discharged from the lli 27 for cooling or heating operation.

Next, the operation of this embodiment will be described.

First, when operating the air conditioner, switch the four-way valve 30 as shown in FIG. 3 to set the pressure to 1fltll! After the refrigerant discharged from the refrigerant 27 passes through the outdoor heat exchanger 28 and the expansion valve 29, it is led to the indoor heat exchanger 1, and is cooled by passing the refrigerant through the indoor heat exchanger 1 while contacting the indoor air. In the present invention, during cooling operation, the damper opening/closing control circuit operates the opening/closing damper 26 to close the warm air outlet 11, and operates the opening/closing damper 13 to open the cold air outlet IO. At the same time, by driving the ventilation fan 14, indoor air is sucked in from the suction port 8 of the indoor unit 2, passes through the indoor heat exchanger l, is cooled, and then flows to the upper part of the room via the cold air blowing duct 3. Air outlet 1 opened facing the viewer
As shown by the solid line arrows in FIGS. 2 to 4, the flow circulates from the upper part of the room to the lower part. Therefore, during cooling operation, the cold air descending method can be adopted. During this cooling operation, the suction port 15 is closed by the circulator damper 16.

Next, heating operation is achieved by switching the four-way valve 30 constituting the refrigeration cycle shown in FIG. 3 to allow the hot refrigerant from the compression R27 to pass through the indoor heat exchanger 1. At the same time, the opening/closing damper 13 causes the blowout passage 9 to
By closing the cold air outlet 10 and opening the opening/closing damper 26, the hot air outlet 11 and the warm air blowing duct 4 are communicated with each other, and at the same time, the blowing fan 25 is rotationally driven.

When the blower fan 25 is rotated in this way, the indoor air flows to the suction port 8 of the indoor unit 2 as shown by the dotted arrow in FIG.
The warm air is sucked into the interior and passed through the indoor heat exchanger 1, where it is heated or warmed and is blown out from the blow-off passage 9.
The air is guided to the outlet duct 4 and blown into the room from the indoor floor through the air outlet 22.

Passing the warm air heated by the indoor heat exchanger 1 through the warm air blowing duct 4 in this way heats the floor panel 20 that directly partitions the warm air blowing duct 4, heating the room with radiant heat. Can be done. In particular, the floor panel 20 is made of a material with excellent thermal conductivity, and the entire back surface of the floor panel 20 forms the warm air blowing duct 4, so that the warm air passing through the entire area of the floor panel 20 is heated. become.

On the other hand, the warm air that has passed through the warm air blow-off duct 4 is blown out from the blow-off port 22, which is located far away from the suction port 8 of the indoor unit 2, to form bubbles and rise against the indoor wall, as shown in FIG. It circulates and heats the room as a draft (warm air flow). In particular, since this air outlet 22 is provided on the floor and is located on the indoor wall side opposite to the indoor unit 2, the warm air blown out from this outlet rises along the indoor wall and enters the room. It is possible to prevent drafts from directly passing through the floor side of the pipe. In other words, the floor is heated by the radiant heat from the floor panel 22, providing comfortable heating without drafts at the feet.

Further, during heating operation, when the atmosphere in the upper part of the room is circulated downward, this is achieved by a circulator integrally formed with the cold air blowing duct 3. Figures 2 and 4
As shown in the figure, the suction port 1 is connected to the circulator damper 16.
5 is opened and the blower fan 14 is slowly rotated to suck indoor air through the suction port 15 provided in the middle of the cold air blow-off duct 3 and blow it out through the blow-off port 12, thereby removing the atmosphere that remains in the upper part of the room. will be circulated. Note that by rotating the fan 14 in the reverse direction, it is possible to suck air from the upper part of the room through the air outlet 12 and blow it out through the air inlet 15.

In addition, by opening the opening/closing damper 19 and driving the ventilation fan 14, the ventilation opening 1 provided in the cold air blowing duct 3 can be opened.
Fresh air can be brought into the room by directing outside air from 8.

This ventilation port 18 is opened not only during heating operation but also during cooling operation to introduce fresh air into the room.

When ventilating the room, the opening/closing damper 13 and the circulator damper 16 are closed, the ventilation port 18 is opened, and at the same time the blower fan 14 is reversed to suck indoor air from the air outlet 12 and cool air blowing duct 3.
Ventilation of the room will be achieved by exhausting the air from the vent 18 via the vent.

In particular, in the present invention, the warm air heated by the indoor heat exchanger 1 passes through the warm air blowing duct 4 divided by the floor panel 22 and is basically heated by radiant heat, so that after the room temperature has risen to a certain extent, The rotational speed of the blower fan 25 that circulates warm air can be set to an extremely low speed, and air conditioning without noise can be achieved. Also, a blower fan 2 to blow out warm air.
5 will be housed in the hot air blowing duct 4 provided in the floor, so a large capacity one can be used, and the number of rotations of the fan can be reduced accordingly for the air volume, so noise can be reduced as much as possible. Can be reduced.

Note that the floor panel 20, hot air blowing duct 4, cold air blowing duct 3, etc. can be freely selected depending on the size of the room.

[Effects of invention According to the present invention, the following excellent effects are exhibited.

(1) The air conditioner makes it possible to heat the indoor floor using radiant heat, achieving comfortable heating without drafts at the feet.

(2) During cooling operation, sufficient air conditioning can be achieved using a descending method of cold air blown from the upper part of the room.

(3) Indoor ventilation can be performed at the same time as heating and cooling.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing one embodiment of the present invention, and FIG.
3 is a circuit diagram showing a refrigeration cycle employed in the present invention, and FIG. 4 is a schematic side sectional view showing the flow of indoor air during heating and cooling operation. In the figure, 1 is an indoor heat exchanger, 2 is an indoor unit, 3 is a cold air outlet duct, 20 is an indoor floor panel, 4 is a hot air outlet duct, 14 is a blower fan, 12 is an outlet, 15 is an indoor air intake port, 25 is a blower fan, and 22 is an air outlet.

Claims (1)

[Claims] 1. An indoor unit that has an indoor heat exchanger for cooling or heating indoor air and is installed at the bottom of the room, and an indoor unit that is connected to the indoor unit and extends upward along the indoor wall to the top of the room. A cold air blowing duct comprising a circulator having an air outlet for blowing out cold air, and a blowing fan on the side of the air outlet, sucking indoor air into the interior upstream of the blowing fan and blowing it out from the air outlet;
A hot air blowing duct is connected to the indoor unit and heated, and is partitioned by the back side of the indoor floor panel for blowing out the warm air from the lower part of the room into the room after passing through the back side of the indoor floor. An air conditioner characterized by: