JPH0331621A - Air conditioner - Google Patents

Abstract

PURPOSE:To raise the temperature of the room quickly to a set point, when the heating operation is started, by forming an opening at an end of a double floor as a passage to the room and by dividing the ejected air into two flows, one being sent through an outlet open to the room and the other being sent through a lower outlet open to an underlying space. CONSTITUTION:When the heating operatio is started, a damper 32 is actuated to divided warmed air into a flow to be sent through a lower outlet 31 and another flow to be sent through an air duct 33 at the start of heating; the warmed air is sent through the lower outlet 31 and through an outlet-at-the-start-of-heating 34. The warmed air ejected through lower outlet 31 flows through an underlying space 36 and is ejected through a vent 37 so that the warmed air warms the living space 24 from under. Simultaneously the warmed air ejected through the outlet-at-the-start-of- heating 34 warms the living space 24 from above so that the temperature can be raised to a set point quickly. In cooling, a blower 28 is designed to rotate oppositely to the rotation for heating; the air flows upward; it is cooled as it passes a heat exchanger 27 and the ejected upward from an upper outlet 30. The cooled air, which has been discharged upward, flows through the underlying space 36 in the double floor 35 and sucked in through the lower outlet 31.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner, and particularly to control of the air blowing from the air conditioner.

BACKGROUND OF THE INVENTION In recent years, importance has been placed on the comfort of the indoor environment provided by air conditioners.

As a conventional technique, there is an air-conditioning/heating system that utilizes an underfloor space, as disclosed in, for example, Japanese Utility Model Application Publication No. 61-3337.

Hereinafter, a conventional air-conditioning device will be explained with reference to FIGS. 6 to 11.

FIG. 6 shows a cross-sectional side view of a conventional heating and cooling device during heating. In FIG. 6, 1 is a chamber. 2 is a floor, and 2a is a floor slab. 1' is the downstairs room,
3 is this ceiling board. 4 is a space formed between the floor 2 and the ceiling plate 3. 5 is a heat pump air conditioner installed near the outer wall of the space 4. 6 is an air supply duct of the heat pump type air conditioner 6.

7 is a damper that switches the air path depending on cooling or heating. 8 is a heating chamber formed by the floor slab 2a and the wall plate 11. 8a is a partition wall of the heating chamber 8. Reference numeral 8b represents a vent hole formed at the end of the partition wall 8a. Reference numeral 9 denotes an air outlet that blows warm air into the heating chamber 8 during heating. 10
is an air outlet that blows cold air into the room 1 for cooling and heating. 12
is an air supply port of the heat pump type air conditioner 6. 1
3 is a communication port that communicates with the heating chamber 8 and the space 4. 14 is a communication port that communicates with the chamber 1 and the heating chamber 8.

The operation of the heating and cooling device configured as described above will be described below.

First, during heating, warm air warmed by the heat pump type air conditioner 5 is sent to the air supply duct 6. and,
The damper 7 operates as shown in FIG. 11, and hot air is sent to the air outlet 9 and flows into the heating chamber 8. At this time,
The floor slab 2a is heated by the hot air, and the room 1 is heated by natural convection generated by the heat on the floor surface. Then, the warm air inside the heating chamber flows through the vent 8 as indicated by the solid line arrow in FIG.
After passing through b, the air flows out from the communication port 13 into the space 4 as shown in FIG. 7, and is returned to the air supply port 12.

Next, during cooling, the damper 7 blocks the air outlet 9, so that the cold air cooled by the heat pump air conditioner 6 is blown directly into the room 1 from the air outlet 10 as shown in FIG. 8, thereby cooling the room. do.

The cold air that has cooled the chamber 1 passes through the communication port 14.13 and reaches the space 4, as shown in FIG. 10, and then is returned to the air supply port 12.

Problems to be Solved by the Invention However, the above configuration has a problem in that it takes time for the indoor temperature to reach the set temperature at the start of operation because hot air is not blown directly into the room during heating.

In addition, since the room is heated by heating the floor slab with hot air and natural convection generated by the heat on the floor surface, there is a problem that heat loss to the floor is large and heating efficiency is poor.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an air conditioner that can quickly bring the indoor temperature to a set temperature at the start of heating operation and improve heating efficiency.

Means for Solving the Problem In order to achieve this object, the air conditioner of the present invention includes an indoor unit with a lower outlet opening into the lower space of the double floor, an upper outlet opening into the room, and an upper outlet opening into the room. An air outlet switching means that switches the air outlet according to the heating/cooling operation mode, and when heating operation starts, distributes the blown air to the air outlet that opens into the room and the lower air outlet that opens to the lower space of the double floor. A blowout air volume distribution means and a ventilation hole communicating with the room at an end of the double floor are provided.

Effect: With the above-described configuration, the present invention blows out hot air from the upper air outlet on the indoor side of the indoor unit and the ventilation hole at the end of the double floor using the airflow distribution means at the start of the heating operation. Warm up the room quickly. When the indoor temperature reaches the set temperature, the airflow distribution means blows out warm air only from the ventilation openings at the ends of the double floor, creating an ideal thermal environment with a cold head and warm feet without discomfort caused by the wind.

In addition, during cooling, the air outlet switching means blows cold air upward from the upper air outlet on the indoor side of the indoor unit and sucks it in from the ventilation opening at the end of the double floor, so you can enjoy cold head and foot heating type air conditioning without the discomfort caused by the wind. It is something to be achieved.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 4.

21 is a side wall, 22 is a floor slab, and 23 is a ceiling. 24
is a residential area where humans live, ASHRAE, 5TA
NDARD defines it as a space with a height of 1800 + ai or less and a distance of 600 wm or more from the side wall (
(The space surrounded by the two-dot chain line in Figure 2).

25 is an indoor unit of an air conditioner, which is installed on the floor in one corner of the room.

The indoor unit 26 has an outer shell 26. Heat exchanger 27. A blower 28 and a casing 29, which are air outlet switching means and can be rotated in forward and reverse directions, are arranged. 3o is an upper air outlet provided at the upper part of the indoor unit 26. 31 is a lower air outlet provided at the lower part of the indoor unit 25.

Reference numeral 32 denotes a blowout air volume distribution means, which is a damper having a fulcrum on the outer shell 26 and capable of being driven. 33 is an air path at the time of starting heating operation. Reference numeral 34 denotes an air outlet at the start of heating operation, which opens at the top of the indoor unit.

36 is a double floor. 36 is a lower space of the double floor 36, and the lower air outlet 31 is open therein.

Reference numeral 37 denotes a ventilation opening that communicates with the room at the end where the double floor 35 and the side wall 21 join, and this position is located near the lower air outlet 3.
1 and as far as possible from the side wall 21 and 6
Within 00+a, human access and office fixtures (bookshelves, etc.)
The best position is where it does not get in the way. A temperature sensor 38 detects the indoor temperature, and is installed in front of the indoor unit 26.

The operation of the air conditioner configured as above will be described below.

First, at the start of heating operation, as shown in FIG. Air is blown out from the air outlet 34 at the start of heating operation. The warm air blown from the lower air outlet 31 passes through the lower space 36 and is blown out from the ventilation hole 37 to warm the living area 24 from below. At the same time, the warm air blown out from the air outlet 34 at the start of the heating operation warms the living area 24 from above, bringing it closer to the set temperature quickly. When the temperature detected by the temperature sensor 38 reaches the set temperature, the damper 32 is driven to block the air passage 33 at the start of the heating operation, as shown by the solid line in FIGS. 1 and 2. After warming the living area 24 by blowing out hot air only from the ventilation opening 37, it is sucked in from the upper air outlet 30 (also used as suction during heating).

Next, during cooling operation, the blower 28 is set to rotate in the opposite direction to that during heating operation, so that the air flows upward, as shown by the dotted lines in FIGS. 1 and 2, and the heat exchange Vessel 27
After being cooled through the air, it is blown upward from the upper outlet 3o. Then, the cold air flowing upward is transferred to the ceiling 2.
3, and from there it descends while spreading downward due to its own weight.

After cooling the living area 24, the ventilation opening 3
7, passes through the lower space 36 of the double floor 36, and is sucked in from the lower outlet 31 (also used for suction during cooling).

According to the above embodiment, at the start of heating operation, the damper 3
2 is driven to blow out hot air from the ventilation port 37 and the heating operation start air outlet 34, thereby warming the living area 24 from both above and below, and quickly reaching the set temperature.

When the set temperature is reached, the damper 32 is driven to close the air passage 33 at the start of the heating operation, blowing out all the hot air from the ventilation opening 3 and covering the entire floor as shown in FIG. Since the living area 24 is directly heated with warm air from the air, heating efficiency is high and a uniform temperature distribution can be obtained.

In addition, during cooling, the cold air is blown upward from the upper outlet 30, hits the ceiling, and then naturally falls under its own weight, so a very uniform temperature distribution without any discomfort caused by the wind is obtained, resulting in high quality. air conditioning can be achieved.

In this embodiment, the upper and lower air outlet switching means is handled by switching between forward and reverse rotation of the fan, but the air outlet may be switched using a switching damper or the like.

Further, in this embodiment, the lower outlet is used as the suction port during cooling and the upper outlet is used as the suction port during heating, but it goes without saying that a dedicated suction port may be provided separately.

Further, in this embodiment, the lower space is formed by a double floor, but it goes without saying that the same effect can be obtained even if the lower space is provided under the floor.

Effects of the Invention As is clear from the above embodiments, the present invention provides an indoor unit equipped with a built-in blower that blows temperature-controlled air that is conditioned by a heat exchanger, and a lower air outlet that opens into the lower space of a double floor. and,
An upper air outlet that opens into the room, an air outlet switching means that switches these air outlets depending on the heating/cooling operation mode, an air outlet that opens air into the room when heating operation starts, and a lower space of a double floor. By providing a blowout air volume distribution means that opens at the bottom and distributes it to the nine lower air outlets, and a ventilation hole that communicates with the room at the end of the double floor, when heating operation starts, the blowout air volume distribution means is provided in the double floor. By simultaneously blowing out hot air from the ventilation opening and the outlet on the indoor side, it is possible to quickly warm up the room.

When the living area reaches the set temperature, the airflow distribution means blows out warm air only from the ventilation holes provided in the double floor, resulting in high heating efficiency and uniform indoor temperature distribution with cold heads and warm feet. It is possible to obtain

During cooling operation, the air outlet switching means blows cold air toward the ceiling from the upper air outlet on the indoor side, and the cold air that falls due to the difference in specific gravity is sucked in through the ventilation holes provided in the double floor, thereby maintaining a uniform indoor temperature. It is possible to obtain a distribution.

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a sectional view of a room in which the air conditioner is installed.
Figure 3 is a cross-sectional view of the main parts of the air conditioner when heating operation starts, Figure 4 is a perspective view of the room in which the air conditioner is installed, and Figure 6 is a perspective view of the room in which the air conditioner is installed.
The figure is a cross-sectional view of a conventional air conditioner during heating;
Figure 7 is a sectional view taken along the line ■-■ of Figure 6, Figure 8 is a sectional view of conventional air conditioning, and Figure 9 is a sectional view of Figure 8.
-V line flat drawing Figure 10 is a sectional view taken along the M-vt line in Figure 9;
FIG. 11 is an enlarged sectional view of a portion corresponding to FIG. 6. 26...Indoor unit, 27...Heat exchanger,
28...Air outlet switching means (blower), 3o...
...Upper outlet, 31...Lower outlet, 32.
...Blowout air volume distribution means (damper), 33...
... Air duct at the start of heating operation, 34 ... Air outlet at the start of heating operation, 36 ... Group/double floor, 36 ... Lower space, 37 ... Ventilation mouth.

Claims (1)

[Claims] An indoor unit that has a built-in blower that blows temperature-controlled air that has been conditioned by a heat exchanger has a lower outlet that opens into the lower space of the double floor, an upper outlet that opens into the room, and these outlets. An air outlet switching means that switches according to the heating/cooling operation mode, and an air volume distribution means that distributes the blown air to the air outlet opened into the room and the lower air outlet opened to the lower space of the double floor at the start of the heating operation. . An air conditioner characterized in that the double floor is provided with a ventilation hole communicating with a room at an end.