JPH02208423A - Air conditioner - Google Patents

Abstract

PURPOSE:To make an ideal distribution of temperature with a cold head and warm feet state within a room by a method wherein an indoor unit is provided with blowing ports opened at a hollow part of a double floor, blowing ports opened into the room, blowing ports changing-over means and the double floor is provided with aeration ports communicating with the room at end portions and communication holes communicating with the room at any optional positions. CONSTITUTION:When a cooling operation is carried out, a fan 18 is rotated normally, air flowed as indicated by a dotted arrow line, passed through a heat exchanger 4 and cooled there is directed upwardly from upper blowing ports 16, strikes against a ceiling, descends by its own weight while expanding downwardly. After the air cools a dwelling area, the air is sucked through an aeration port 23 and a communication hole 24, passes through a hollow part 22 of a double floor 21 and further the air is sucked at a lower blowing port 17. In turn, when a heating operation is carried out, the fan 18 is rotated in a reverse direction, the hot air is blown from the lower blowing port 17 as indicated by a solid line, the air passes through the hollow part 22 and is blown out of an aeration port 23 and the communication hole 24. At this time, the hot air passes while heating the double floor 21 from below it, resulting in that a temperature of the floor 21 is increased and then a room 2 is indirectly heated with a natural convection flow. The hot air passed from the aeration port 23 and the communication hole 24 is sucked into the blowing ports 16.

Description

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

Prior Art The conventional technology will be explained with reference to FIGS. 6 and 7. Reference numeral 1 denotes an indoor unit of a floor-standing air conditioner, which is installed on the floor in one corner of the room 2. The indoor unit 1 includes an outer shell 3 and a heat exchanger 4
and 7 are arranged one above the other in the air blower consisting of the fan 6 and the casing 6. Air outlets 8 and 8' are provided at the upper and upper side of the outer shell 3, and a suction port 9 is provided at the lower front of the outer shell 3, and the p-pa 1o is connected to the air outlet 8, 8' so that the air outlet direction can be changed. It is located approximately in the center.

Further, a suction temperature detection means 11 is provided near the suction port 9, which measures the suction air temperature, detects the temperature difference from the set temperature, and turns the cooling system OFF to turn the inside of the room 2 approximately - It is maintained at various temperatures.

Generally, a floor-standing air conditioner is often installed in one corner of the room 2, especially in a perimeter area. Room 2 has ceiling 12,
It consists of side walls 13, 14 and a floor 16. In addition, the space surrounded by the two-dot chain line in Figure 7 is the living area, and ASHRAE
, 5TANDARD defines the living area as a space with a height of 1B, 00m or less, and a distance of 600m or more from the side wall. In other words, humans are defined as living in the habitat of cats.

The operation of a conventional floor-standing air conditioner configured and installed in this manner will be explained.

During cooling operation, the air sucked in from the suction port 9 is transferred to the heat exchanger 4.
The liquid is cooled by the air outlet 8, 8' and is blown out forward from the air outlet 8, 8'. However, since the blown air is at a low temperature and has a higher specific gravity than the surrounding air, it immediately becomes a downward airflow and flows along the floor 15, and is sucked in again from the suction port 9. As a result,
As can be seen in the temperature distribution measurement results in Figure 7a, the lower part of chamber 2 is at a lower temperature, and the upper part is at a high temperature of nearly 3o''C, and the temperature distribution in the vertical direction becomes large, with the head being hot and the feet being hot. This results in a very uncomfortable temperature distribution of cold.Also, the area shown by the grid in the garden is the troughty area (area where the wind is strong and makes you feel uncomfortable), and it appears largely towards the indoor unit 2@ side, and the area in front of the indoor unit 2 So it can be said that it is impossible to stay there for a long time.

On the other hand, during heating, contrary to when cooling, the blown air has a high temperature and has a lower specific gravity than the surrounding air, so it becomes an upward airflow and a flow toward the ceiling 12 is generated. As a result, as shown in Figure 7, high-temperature air stagnates near the ceiling 12 of room 2, and the lower part becomes cold, making the head hot and the feet cold, which is the same discomfort as when cooling. This results in a temperature distribution. In addition, as shown in the grid in the park, the current situation is that the trafty area is occurring over a very wide area.

Problems to be Solved by the Invention When air conditioning is performed by installing the indoor unit 1 in a corner of a store, office, or living room, warm air tends to accumulate in the upper part of the room 2 and cold air tends to accumulate in the lower part, resulting in poor temperature distribution. In addition, in order to maintain a good indoor temperature distribution, there is a method of increasing the wind speed of the blown air to improve the reach of the temperature-controlled air. However, there was a problem in that it was not possible to provide high quality and comfortable air conditioning because the blowing air directly hits one part of the face, making the user feel extremely uncomfortable and physically cold.

On the other hand, turn the blowing direction upward to prevent the wind from hitting your body.
When air is blown parallel to the side wall 13, during cooling, the cold air that hits the ceiling 12 spreads and descends due to its own weight (it is heavier than the surrounding air due to its low temperature), so there is no trough and the room has a relatively uniform temperature distribution. becomes. However, during heating operation, the warm air that hits the ceiling 12 has a high temperature and is lighter than the surrounding air, so it stays near the ceiling 12, resulting in a wide and uneven temperature distribution in the vertical direction of the living area. I had the problem of putting it away.

In addition, if furniture such as a desk or low partition is placed near the air outlets 8 and 8', the convection of temperature-controlled air will be obstructed and the temperature distribution in the living area will not be uniform. .

The present invention solves the above-mentioned problems, and aims to provide an air conditioner that eliminates the discomfort caused by direct contact of blown air with people, and that can create an ideal temperature distribution indoors for keeping the head cold and feet warm. .

Friendly means for solving the problem In order to achieve this object, the air conditioner of the present invention includes an indoor unit, an air outlet opening in the hollow part of the double floor, and an air outlet opening indoors. an air outlet switching means for switching the air outlet according to the heating/cooling operation mode; the double floor is provided with a ventilation hole that communicates with the indoor room at an end, and a communication hole that communicates with the indoor room at an arbitrary position. Tebru.

Function: Due to the above-described configuration, the present invention heats the double floor during heating operation to indirectly warm the air in the living area, and also heats the air from the ventilation opening at the end of the double floor and the continuous d hole at any location. By controlling the temperature by blowing out hot air, radiant heating and breeze heating are performed from below the living area, creating an ideal thermal environment that keeps your head cold and your feet warm, without the discomfort caused by wind. Also, when cooling, 74? from the indoor air outlet of the indoor unit. Since the wind is blown upward and sucked in through the ventilation holes at the ends of the double floor and communication holes at arbitrary locations, it achieves cold-head, warm-foot air conditioning without the discomfort caused by the wind.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 4. In addition, explanations are omitted for those that are the same as before.
Only the points of difference will be described.

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing the main parts thereof.

An upper air outlet 16 and a lower air outlet 17 are provided at the upper part of the indoor unit 1, and a lower air outlet 17 is provided at the lower part, and a heat exchanger 4 is provided between the lower air outlet 16 and the lower air outlet 17. A blower 20 consisting of a rotatable fan 18 and a casing 19 is arranged. The lower outlet 17 is located in the hollow part 22 of the double floor 21.
It is open to

Reference numeral 23 denotes a ventilation opening that communicates with the room at the end where the double floor 21 and the side wall 14 join, and this position is located near the lower air outlet 1.
7 as far as possible and from said side wall 14 to 6.
Within 00 tm, human access and office fixtures (bookshelves, etc.)
The best position is where it does not get in the way. Reference numeral 24 denotes a micro-diameter communication hole that communicates with the interior of the room at an arbitrary location on the double floor 21.

Next, the operation of the air conditioner configured as described above will be explained.

During cooling operation, the fan 18 rotates in the normal direction, and the cooled air flows upward as indicated by the dotted line arrows in FIGS. It is blown upward from.

The cold air flowing upward collides with the ceiling 12, and from there spreads downward due to its own weight and descends. After cooling the living area, the ventilation port 23 and the communication hole m1
4 and passes through the hollow part 22 of the double bed 21,
The air is sucked in from the lower outlet 17 (also used as suction during cooling).

Fig. 4a shows an example of the temperature distribution measured by the inventor when the air conditioner is actually cooled in this manner, and it can be said that the upper and lower temperature distribution in the living area has almost no distribution at about 2°C. Also,
Although the traft area is shown as a mesh, it occurs only in the area outside the living area and close to the ceiling 12, and people inside the living area do not feel any discomfort due to the wind.

On the other hand, during heating operation, the fan 18 is set to rotate in the opposite direction, and as shown by the solid line in FIG. Part 22
, and is blown out from the ventilation port 23 and the communication hole 24.

At this time, since the hot air passes through the double bed 21 while warming it from below, the temperature of the double bed 21 rises, and the room 2 is indirectly warmed by natural convection. The hot air blown out from the ventilation port 23 and the communication hole 24 is sucked in from the upper air outlet 16 (also used as suction during heating) while directly warming the chamber 2.

Incidentally, since the communication hole 24 has a minute diameter, the speed of the warm air blown out from the hole is as small as 0.1 m/s or less, so that humans do not feel uncomfortable due to the airflow.

Figure 4 shows an example of the temperature distribution by the inventor when heating was actually performed in this way. This allows for even air conditioning. In addition, although some trough areas can be seen near the ventilation opening 23 outside the living area, people within the living area do not feel any discomfort due to the wind.

In addition, the effect of thermal radiation from the surface of the double floor 21 increases the sensible temperature from the feet to the waist, creating an ideal thermal environment with a cold head and warm feet.

According to the above embodiment, during cooling, the upper outlet 1 of the air conditioner
The cold air is blown upward from 6, hits the ceiling, and then falls naturally under its own weight, resulting in a room with a very uniform temperature distribution without any discomfort caused by the wind. In addition, during heating, warm air is blown from the lower air outlet 17 into the hollow part 22 of the double floor 21, and while warming the double floor 21, the air vent 23 near the end of the double floor and the arbitrary position are heated. Since the air is blown out through the communication holes 24, a very uniform temperature distribution can be obtained, and the effect of heat radiation from the floor is also combined, making it possible to realize high-quality air conditioning.

Effects of the Invention As is clear from the above embodiments, the present invention provides an indoor unit having a built-in blower that blows temperature-conditioned air that has been conditioned by a heat exchanger, and an air outlet that opens into a hollow part of a double floor. an air outlet that opens into the room; an air outlet switching means that switches these air outlets according to the heating/cooling operation mode; a ventilation hole that communicates with the indoor room at an end in the double floor; By providing a communication hole that communicates with the room, during cooling, cold air is blown toward the ceiling from the outlet on the indoor side, and the cold air that has fallen due to the difference in specific gravity is sucked in through the ventilation hole and communication hole provided in the double floor. Therefore, it is possible to obtain a uniform indoor temperature distribution.

Also, during heating, warm air is blown into the hollow part of the double floor.

Air is blown into the room through ventilation holes and communication holes installed in the double floor.
Uniform temperature distribution and heat radiation from the floor surface can be obtained1.
It is possible to create a comfortable space where your head is cold and your feet are warm.

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 air outlet is used as the suction port during cooling and the upper air 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 hollow portion is formed by a double floor, but it goes without saying that the same effect can be obtained even if the space is provided under the floor.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an air conditioner showing an embodiment of the present invention;
Figure 2 is a sectional view showing the main parts of the air conditioner, Figure 3 is a perspective view of the room in which the air conditioner is installed, and Figure 4 is a temperature distribution diagram of the cross section taken along line 1-1 in Figure 3. , and Fig. 4a
Figure 4 is a temperature distribution diagram during cooling operation, Figure 4 is a temperature distribution diagram during heating operation, Figure 6 is a sectional view of a conventional air conditioner, Figure 6 is a perspective view of a conventional air conditioner, and Figure 7 is a temperature distribution diagram during cooling operation. The figures show the temperature distribution in a room in which a conventional air conditioner is installed, with Figure 7a being a temperature distribution diagram during cooling operation, and Figure 7A being a temperature distribution diagram during heating operation. 1...Indoor unit, 2...Room, 4...
...Heat exchanger, 16...Upper outlet, 17...
...Lower outlet, 20...Blower rock, 21...
...Double floor, 22...Hollow part, 23...
...Ventilation port, 24...Communication hole. Name of agent: Patent attorney Shigetaka Awano and 1 other person-m
− f7 −−− 2+ −−− 1 Inner room J: Air outlet T (output σ 211 order hollow part 1/!i air outlet *a 几 −−116 −m− 77−・− 8−1η − 1υ - 1 Indoor unit lower outlet Lower outlet fan = 1 Hollow floor ventilation port #Vent hole No. 1 Fig.

Claims (1)

[Claims] The indoor unit has a built-in blower that blows temperature-controlled air that has been conditioned by a heat exchanger, and has a lower outlet opening into the double floor space, an upper outlet opening into the room, and these upper and lower outlets. an upper and lower air outlet switching means for switching according to the heating/cooling operation mode; a ventilation opening that communicates with the room at or near the end of the double floor; and a communication hole that communicates with the room at an arbitrary position. An air conditioner characterized by being provided with.