JPH02195126A - Air conditioner - Google Patents

Abstract

PURPOSE:To make it possible to obtain an ideally comfortable airconditioning performance which can keep the head cool and the feet warm by providing an upper blowoff port and a lower blowoff port, connecting said lower blowoff port with a hollow section in a double floor, and boring an opening which penetrates the double floor and communicates with the hollow section and a room. CONSTITUTION:A upper blowoff port 16 is installed to the upper part of an indoor airconditioner while a lower blowoff port 17 is installed to the lower part. The lower blowoff port 17 is connected with a hollow section 22 in a double floor 21. The double floor 21 is provided with openings 23a, 23b,...23x which communicate with the hollow section 22 and a room 2 which are laid out uniformly over the entire floor. When a fan 18 makes a normal rotation during cooling operation, the air is adapted to flow upward, passing through a heat exchanger 4 so that the cooled air may be discharged upward from the upper blowoff port 16. The fan 18 is designed to make a reverse rotation during heating operation. The hot air is discharged from the lower blowoff port 17, passing through the hollow section 22 in the double 21 so that the hot air may be discharged from the opening sections 23a, 23b,...23x.

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 has an outer shell 3, a heat exchanger 4, a fan 6, and a blower 7 made of a casing e arranged above and below. Air outlet 8 is provided at the top and upper side of the outer shell 3.
．． 8', and a suction port 9 is provided at the lower front surface of the outer shell 3, and a looper 10 is provided approximately at the center of the air outlet 8.8' so that the blowing direction can be changed.

In addition, a suction temperature detection means 11 is provided near the suction port 9, which measures the suction temperature and detects the temperature difference from the set temperature, and turns the cooling system OFF to turn the inside of the room 2 off. The temperature is maintained at approximately -.

Generally, a floor-standing air conditioner is often installed in one corner of the room 2, especially in a perimeter area. Room 2 has a ceiling of 12.
It consists of side walls 13, 14 and a floor 16. It is also surrounded by the two-dot chain line in FIG.

Space is a living area, ASHRAE, 5TANDARD
This area is defined as having a height of 18,000 or less and a distance of 60,011 or more from the side wall. In other words, it is an area where humans are thought to be active.

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 air is cooled and blown out forward from the air outlet 8.8', cooling the inside of the living area as shown in Figure 6a. However, the blown air is at a low temperature and has a higher specific gravity than the surrounding air, so it immediately becomes a downdraft and flows across the floor 16, and is sucked in again from the suction port 9. As a result, as shown in Fig. 6a, As can be seen in the temperature distribution measurement results, the lower part of chamber 2 is at a low temperature, and the upper part is at a temperature of 30°C.
As the temperature approaches ℃ υ, the temperature distribution in the vertical direction increases,
This results in an extremely uncomfortable temperature distribution where the head is hot and the feet are cold. Furthermore, the area shown in the figure is the trafty area (an area where wind is strong and uncomfortable), and it appears largely in front of the indoor unit 2, and it can be said that it is impossible to stay in front of the indoor unit 2 for a long time.

An upward air current and a flow toward the ceiling 12 are generated.

As a result, as shown in Figure 6, high temperature air stagnates near the ceiling 12 of room 2, and the lower part becomes cold.
As with air conditioning, the head is hot and the feet are cold, resulting in an uncomfortable temperature distribution. Furthermore, as shown in the figure, the current situation is that the trough area also occurs 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. Therefore, 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, if the speed of the blowing air is increased, the blowing air will directly hit one part of the face of the person near the outlet, making them feel very uncomfortable and feeling cold. There was a problem that comfortable air conditioning could not be provided.

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 (low temperature, so it is lighter than the surrounding air), 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.

Furthermore, when furniture such as desks and low partitions are placed near the air outlets 8 and 8', the convection of temperature-controlled air is obstructed, further worsening the temperature distribution in the living area. Ta.

The present invention has been made to solve the above-mentioned conventional problems, and aims to provide an air conditioner that enables ideal comfortable air conditioning for a cold head and warm feet type without discomfort due to wind.

Means for Solving the Problems In order to achieve the above object, the air conditioner of the present invention includes an indoor unit provided with an upper outlet and a lower outlet, the lower outlet connected to the hollow part of the double floor, In addition, an opening is made that penetrates the double floor and communicates the hollow part with the room, and during heating, the heat exchanged hot air is blown out from the lower outlet into the hollow part of the double floor, Cool air is blown at a slight speed from the provided opening, and during cooling, the cold air is blown upward from the upper outlet, contrary to when heating.

Effect The present invention has the above-mentioned configuration, and during heating operation, warm air flows into the hollow part of the double floor and then blows into the room at a slight wind speed from the opening made in the double floor, thereby cooling the living area. Convection heating is performed from below with a radiant heating effect, creating an ideal thermal environment that keeps your head cold and your feet warm, without the discomfort caused by wind. On the other hand, during cooling operation, cold air is blown upward from the air outlet above the indoor unit and sucked in through the double floor opening, achieving air conditioning that keeps your head cold and your feet warm, 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. 2 is a configuration diagram showing an embodiment of the present invention.

An upper air outlet 18 is installed at the top of the indoor unit 1, and a lower air outlet 1 is installed at the bottom of the indoor unit 1.
7, and between the upper and lower air outlets 16 and 17, a heat exchanger 4 and a blower 2o consisting of a fan 18 and a casing 19, which are upper and lower air outlet switching means and are capable of forward and reverse rotation, are arranged. There is.

Further, the lower outlet 17 is connected to the hollow part 22 of the double floor 21, and the double floor 21 has openings 23a, 23b, etc., which communicate the hollow part 22 and the chamber 2. ...23
x are provided evenly over the entire floor surface.

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 as shown by the dotted arrow in FIG. 1, the air flows upward, passes through the heat exchanger 4, and the cooled air is blown upward from the upper outlet 16. Ru.

The cold air flowing upward hits the ceiling 12, and from there it descends while spreading downward due to its own weight. After cooling the living area, the opening 23a is opened.

23b, . . . 23x, passes through the hollow part 22 of the double bed 21, and is sucked in from the lower air outlet 1 (also used as suction during cooling). Fig. 3a 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 is approximately 2°C, and there is almost no distribution. Furthermore, although the trafty area is indicated by , it occurs only in the area outside the living area and close to the ceiling 12, and people within the living area do not feel discomfort due to the wind at all.

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. It blows out from the openings 23a, 23b, . . . 23x. At this time, since the hot air passes through the double bed 21 while heating it from below, the temperature of the double bed 21 rises, and the room 2 is indirectly warmed by natural convection. Moreover, the opening 23a,
2sb ;・・・・・・ Warm air flows from 23x to room 2
The air is blown inward at a slight speed (035 m/s or less) to warm the room 2, and then sucked in through the upper air outlet 16 (also used as a suction during heating). After that, the air heated by the heat exchanger 4 is sent to the fan 1.
8, the air is again blown out from the lower air outlet 17.

Figure 3 shows an example of the temperature distribution measured by the inventor when heating was actually performed in this way.The temperature distribution above and below the living area was 0.5 - 1℃, with almost no temperature unevenness. Air conditioning becomes possible. Furthermore, there is no trafty area, and people within the living area do not feel any discomfort due to the wind.

Moreover, the surface temperature of the double floor 21 is 2 to 3 degrees Celsius higher than the temperature near the feet, and due to the effect of thermal radiation from the floor 21, the sensible temperature from the feet to the waist rises, making it ideal for people with cold head and warm feet. It can create a thermal environment.

According to the above embodiment, during cooling, cold air is blown upward from the upper outlet 16 of the air conditioner, hits the ceiling, and then naturally descends under its own weight, resulting in a very uniform air flow without any discomfort caused by the wind. It can be made into a space with temperature distribution. In addition, during heating, hot air is blown from the lower outlet 17 into the hollow part 22 of the double floor 21, and while warming the double floor 21, the opening 23a of the double floor 21 is heated.
, 23b.

Since the air is blown out from a 23x breeze blower, a very uniform temperature distribution is achieved without any discomfort caused by the wind, and the heat radiation effect from the floor is also added to achieve high-quality air conditioning. can.

Further, in this embodiment, the openings 23a, 23b, . . .
...23x are installed evenly over the entire floor surface, but more can be installed in areas where residents work, allowing them to function as personal air conditioning.

Effects of the Invention As is clear from the above description, the present invention provides an indoor unit with a built-in blower that blows temperature-controlled air conditioned by a heat exchanger, and an upper outlet and a lower outlet. is connected to the hollow part of the double floor, and an opening is drilled through the double floor to communicate the hollow part and the room. The structure is such that hot air is blown out from the upper outlet when cooling the room, and cold air is blown out from the upper outlet when cooling the room, so when heating the room, warm air can be blown into the room from the hollow part of the double floor through the opening provided in the double floor. In this way, convection heating is performed from below the living area while providing a radiant heating effect, and during cooling, the cold air is blown upwards from the indoor unit and lowered by the weight of the cold air to perform convection cooling. You can get an ideal thermal environment with a cold head and warm feet without any discomfort caused by the wind.

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 hollow part is formed by a double floor, but it goes without saying that the same effect can be obtained even if the hollow part 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 of 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 the IV of Figure 3.
Fig. 4a is a temperature distribution diagram of a cross section along the -IV'line;
Figure 4 is a temperature distribution diagram in a cooling state, Figure 4 is a temperature distribution diagram in a heating state, 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 diagram of a temperature distribution in a heating condition. These diagrams show the temperature distribution of a room in which a conventional air conditioner is installed. FIG. 7a is a temperature distribution diagram in a cooling state, and FIG. 7A is a temperature distribution diagram in a heating state. 1...Indoor unit, 2-...Room, 4...
...Heat exchanger, 16...Upper outlet, 17...
...Lower outlet, 2o...Blower, 21...
...Double floor, 22-...Hollow part, 23a. 23b, 233C, opening. Name of agent: Patent attorney Shigetaka Awano and 1 other person Fig.-m- Go; -・ η --- 6 Kinuta-nt-Bx --- 1 Inner unit room 2 Exit lower air outlet Double floor Hollow frontage Part 1-・- m-・ 21-・ Gochi, 238. -・23Z --- In the room Yumuro Yuma 6 rClr: Exit lower last exit O O! Wind fan double floor hollow opening No. 2rgJ I-11th room circle λ 21-211th floor-hollow part Fr-Z? χ-opening! −〜−Indoor Lu 2−・・Xuan 2+−−・Second floor

Claims (1)

[Claims] an indoor unit having a built-in blower that has an upper outlet and a lower outlet and blows temperature-conditioned air that is conditioned by a heat exchanger; a hollow part with a double floor communicating with the lower outlet; and a double floor. An opening that penetrates the hollow part and communicates with the room is formed, and an upper and lower air outlet switching means is provided to arbitrarily switch the air flow from the upper and lower air outlets depending on the heating/cooling operation mode. Characteristic air conditioner.