JPH03267646A - Air conditioner - Google Patents

Abstract

PURPOSE:To prevent cold draft phenomenon from happening and make a head- cool, feet-warm keeping air conditioning possible by a method wherein in response to perimeter load, the adjustment of air volume balance for hot air, from an upper vent port which is opened at an upper part of an indoor unit and a lower vent port which is opened at a lower part and communicates with a space under a double floor, is made possible by a blowing-out air dividing device. CONSTITUTION:A difference theta1 between a set temperature and a living area room temperature Ti which is detected by a living area room temperature sensor 41 is operated. When theta1>10 deg. is not satisfied, a perimeter part room temperature Tp is detected by a sensor perimeter part room 36, and a difference theta2 between the living area room temperature Ti and the perimeter part room temperature Tp is operated. In this case, when theta2=Ti-Tp>5 deg.C is satisfied, a vane for a blowing-out air dividing device is rotated slightly upward and stops at a position of 30a so that upper blowing is set at 70% and lower blowing is set a 30%. When 5>=theta2>2 deg.C is satisfied, the vane for the blowing-out air dividing device is further rotated upward and stops at a position of 30b so that the lower blowing is set at 70% and the upper blowing is set at 30%.

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 created 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 system will be explained with reference to FIGS. 7 to 13.

FIG. 7 shows a cross-sectional side view of a conventional heating and cooling device during heating. In FIG. 7, 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 placed near the outer wall of the space 4. 6 is an air supply duct of the heat pump type air conditioner 5.

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 chamber 1 during cooling. 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 portion 4 . 14 is a communication port that communicates between 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. 13, 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 shown by the solid line arrow in FIG.
After passing through b, the air flows out from the communication port 13 into the space 44 as shown in FIG. 9, 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 5 is blown directly into the room 1 through the air outlet 1o as shown in FIG. Cool down. 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. 12, 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.

In addition, it was not possible to deal with the phenomenon in which the feet of residents near windows become cold due to cold drafts (cold air convection) from windows, especially during heating.

The present invention solves the above-mentioned problems, and has a configuration that can quickly bring the indoor temperature to the set temperature at the start of heating operation, improve heating efficiency, and cope with peripheral load fluctuations. To provide an air conditioner capable of air conditioning that keeps feet warm, head cold, and feet warm.

Means for Solving the Problem In order to achieve this object, the perimeter load calculation means calculates the υ perimeter load based on the outputs of the air conditioner wall meter section room temperature detection means and the living area room temperature detection means. Based on the calculation, the air flow distribution means balances the volume of warm air from the lower outlet opening at the top of the indoor unit and the lower outlet opening at the bottom communicating with the lower space of the double floor using the outlet distribution means according to the perimeter load. It has an adjustable configuration.

Effects According to the present invention, with the above-described configuration, at the start of the heating operation, all of the hot air is blown out from the lower outlet on the indoor side of the indoor unit by the blowout/distribution means to quickly warm up the room. The perimeter load calculation means calculates the perimeter load based on the outputs of the perimeter room temperature detection means and the living area room temperature detection means, and changes the division ratio of the upper air outlet and the lower air outlet in accordance with the perimeter load output. In other words, when the perimeter load is small, warm air is passed through the space under the double floor to further warm the feet. Conversely, when the perimeter load is large, a portion of the hot air is blown upward to correspond to the perimeter load. From the start of heating operation, the perimeter load calculation means always calculates the perimeter load based on the outputs of the perimeter room temperature detection means and the living area room temperature detection means, and the upper and lower blowout is controlled by the blowout diversion means according to fluctuations in the perimeter load. Adjust the air volume balance of the blowout. As a result, the discomfort caused by the wind is alleviated by reducing the amount of air blown from the upper outlet, and it is possible to create an ideal thermal environment that is cold to the head and warm to the feet with almost no airflow sensation, and that corresponds to the perimeter load.

In addition, during cooling, the blowout switching means blows cold air upward toward the ceiling from the upper blowout on the indoor side of the indoor unit, and allows the cold air to naturally fall under its own weight to equalize the temperature distribution. As a result,
As for the air conditioning, the upper part of the room is cool and the lower part is slightly warm, with a head-cooling and foot-heating type, which eliminates the discomfort of the wind and realizes ideal air conditioning that can handle the perimeter load.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 6.

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 m or less and a distance of 600 tm or more from the side wall (the space surrounded by the two-dot chain line in Figure 2).

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

The indoor unit 25 has an outer shell 28. Heat exchanger 27. Blower 28
and casing29. A blowout diverting means 3o having a fulcrum on the outer shell 26 and driven by an electric motor (not shown), and an upper blowing ratio rotor 31 on the upper surface. A lower air outlet 32 is provided on the lower surface, and the indoor unit 25
They communicate through an air passage 33 on the back.

Further, a plurality of louvers 34 are provided at the upper blower outlet 31 so that the blower angle can be changed arbitrarily.

A suction port 35 is installed at the lower front of the indoor unit 26, and a room temperature sensor 36 at the perimeter (near the window) for detecting the suction temperature is installed between the suction port 36 and the heat exchanger 270.

37 is a double floor, and 38 is a lower space formed by the floor slab 22 and the double floor 3A.

The lower air outlet 32 communicates with a lower space 38 .

Further, 39 is a ventilation hole communicating with the room at the end where the double floor 37 and the side wall 21 join, and this position is as far away from the lower air outlet 32 as possible and within 600 m from the side wall 21. Therefore, a location that does not interfere with people's access or office equipment (such as a library) is optimal.

A wireless remote controller 4o that controls the air conditioner is provided with a room temperature detection sensor 41 for the living area.

The operation of the air conditioner configured as described above will be explained using a flowchart (FIG. 6).

After the wireless remote control 41 takes in the source, the temperature of the room 1 is set T86. (step 42), and selects the cooling/heating mode (step 43).

First, during heating operation, the living area room temperature sensor 41 detects the living area room temperature Ti (step 44), and sets the set temperature Tset.
and the living area room temperature T detected by the living area room temperature sensor 41
The difference θ from i is calculated (step 45).

Here, if θ = T, ot-Ti) 1ot: is satisfied (YES), when the room temperature in the living area is 10°C or more lower than the set temperature, the airflow diversion means 30 is adjusted so that the upper airflow is 100 degrees. The vane rotates downward (Fig. 3)
, closes the air path 33 to the lower air outlet 32 (step 46
). That is, when the living area 24 is cold, warm air is directly sent into the living area and the temperature is controlled to quickly approach the set temperature "set".

If θ, >10°C is not satisfied (No), the sensor 36 detects the temperature at the perimeter at the room temperature at the perimeter.
p is detected (Step 47), and the difference θ2 between the living area room temperature Ti and the perimeter Tp is calculated (Step 48).
.

If θ2=T1-Tp〉5°C is satisfied, the vane of the blowout diverting means 30 is rotated slightly upward so that the upper blowout is set to 70% and the lower blowout is set to 30% (step 49), as shown in FIG. Stop at position 30a. In this way, while directly heating the living area, the floor is heated little by little while responding to the perimeter load, and heating from below is also used.

Then, when the temperature reaches 6≧02>2℃, the bottom blowout is 7o%.

As the upper blowout is set to 30% (step 50), the vane of the blowout diverting means 30 also rotates slightly upward and stops at the position 30b.

Finally, as the room temperature is approaching the set temperature, we are reducing the proportion of direct heating in the living area 24 and switching to a type that focuses on underfloor heating. In this case as well, although the heating is mainly based on floor heating, it corresponds to the upper blowout perimeter load.

If the condition of 0252°C is satisfied, all the hot air is blown out from the bottom υ (step 51), and the hot air blown out from the bottom air outlet 32 passes through the lower space 38, heating the double floor 37 and ventilating it. Proceed to port 39 and blow out into chamber 1. In other words, when the room temperature and the set temperature are close to each other, warm air is passed through the space 38 below the double floor 37 to warm the entire floor and realize radiant floor heating (solid line arrow in Figure 2).

Next, during cooling operation, the top blowout is unconditionally controlled to 10% (step 46), and cold air is blown upward from the top blowout port 31 (dotted line arrow in Figure 2). The cold air flowing upward hits the ceiling 23 and descends from there while spreading downward due to its own weight. After the living area 24 is cooled, it is sucked into the suction port 35 (FIG. 3).

According to the above embodiment, when the difference between the room temperature of the living area and the set temperature is large at the start of heating operation (for example, at the beginning of operation), the vane of the blow-off distribution means 30 is driven to blow hot air from the lower blow-off port 31. The living area 24 is directly heated while responding to the perimeter load. On the other hand, as the difference between the room temperature in the living area and the set temperature becomes smaller, a portion of the warm air is gradually sent to the lower space 38 of the double floor 37, and the vanes of the blow-off/distribution means 3o drive.

In this case as well, the floor heating system will be the main type, but the upper air outlet will accommodate the perimeter load. Then, if the difference between the room temperature in the living area and the set temperature is small, and the difference between the room temperature in the living area and the perimeter room temperature becomes small, control is performed so that all of the warm air is sent into the lower space 38.

As a result, mild heating can be achieved through both the heating effect due to natural convection from the entire surface of the heated double floor and the heating effect due to hot air blown from the ventilation openings.

As a result, the start-up performance during heating is good, and when it approaches steady operation, it can create a living space similar to floor heating, making it possible to provide heating with almost no vertical temperature distribution, cold head and warm feet, and no discomfort caused by wind. shall be.

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 example, the setting standard for the ratio of the blowout branch is 10°C.
The figures are 5℃ and 2℃, but these values are based on room dimensions.

It changes depending on the amount of load, etc., and is not unique.

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 having an upper air outlet opened at the upper part and an upper air outlet opened at the lower part of the indoor unit which has a built-in blower for blowing temperature-controlled air conditioned by a heat exchanger. A lower outlet, an air path that communicates the upper outlet, the blower, and the lower outlet, and an outlet dividing means that can arbitrarily change the upper and lower outlet air volume distribution ratio are provided, and the opening of the lower outlet is located at the bottom of the double floor. Provide a ventilation hole that communicates with the space and communicates with the room at the end of the double floor, and provide perimeter load calculation means that calculates based on the outputs of the living area room temperature detection means and the perimeter room temperature detection means. During heating operation, when the difference between the room temperature in the living area and the set temperature is large (such as when starting heating operation), all of the warm air is sent to the upper air outlet by the blow-off distribution means, directly warming the living area and quickly setting the temperature. Control the temperature so that it approaches the same temperature. On the other hand, when the room temperature in the living area rises, is close to the set temperature, and there is a large difference between the room temperature in the living area and the room temperature in the perimeter area, the airflow dividing means changes the splitting ratio between the upper air outlet and the lower air outlet, and a portion of the warm air is is controlled so that it is sent out from the lower air outlet.

As a result, the double floor is heated little by little while responding to the υperimeter load with the bottom blower, and the effect of heating the feet gradually appears. When the room temperature of the perimeter section becomes approximately equal to the room temperature of the living area, all of the hot air is blown out downward by the blow-off/distribution means, the double floor is warmed by the hot air, and the warm air is blown out from the ventilation opening. As a result, due to the effect of floor heating, there is almost no temperature distribution, and moreover, it provides an ideal heating space that keeps the head cold and the feet warm.

In addition, during cooling operation, the air outlet switching means blows cold air from the upper air outlet on the indoor side toward the ceiling and lowers it due to the difference in specific gravity, so it is possible to cool the head and warm the feet without feeling any airflow.

[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.
Figures 3 and 4 are sectional views of the main parts of the air conditioner in each operating state, Figure 5 is a perspective view of the room in which the air conditioner is installed during steady operation during heating, and Figure 6 is the air conditioner A flowchart of the operation of the conditioner, Fig. 7 is a cross-sectional view of a conventional air conditioner during heating, and Fig. 8 is a flat line drawing of Fig. 7 from ■ to ■.
The figure is a sectional view taken along the line ■-■ in Fig. 8, Fig. 10 is a sectional view taken during conventional cooling, and Fig. 11 is a flat line drawing taken along the line ■-■ in Fig. 10.
2 is a sectional view taken along the line ■--■ in FIG. 11, and FIG. 13 is an enlarged sectional view of a portion corresponding to FIG. 8. 25... Indoor unit, 27... Heat exchanger,
28...Blower, 30...Blowout diversion means, 31...Upper outlet, 32...Lower outlet, 33...Air channel , 36...perimeter room temperature sensor, 37...double floor, 38...
... lower space, 39 ... ventilation duct, 4o ...
...Wireless remote control, 41... Living area room temperature sensor.

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 an upper air outlet that opens at the top, a lower air outlet that opens at the bottom, and an upper air outlet, a blower, and a lower air outlet. A communicating air passage and an air outlet dividing means that can arbitrarily change the upper and lower outlet air volume distribution ratio are provided, and the opening of the lower outlet is communicated with the lower space of the double floor, and the end of the double floor is connected to the indoor An air conditioner characterized in that a communicating ventilation opening is provided, and calculation means is provided for calculating based on the outputs of the perimeter room temperature detection means and the living area room temperature detection means and controlling the blowout diversion means. .