JPH0428946A - Air conditioner - Google Patents

Abstract

PURPOSE:To cause an indoor temperature to be rapidly set to a set temperature when a heating operation is started and to improve a heating efficiency by a method wherein a ratio of an air amount of hot air blown from an upper blowing port opened at an upper part of an indoor device and a lower air blowing port communicated with a lower spacing opened downwardly and placed at a double-floor is controlled by a blown flow dividing means in response to a perimeter load. CONSTITUTION:When a difference between a room temperature and a set temperature is high (for example, at the beginning of operation), a vane of an air blowing dividing means 31 is driven irrespective of a value of a perimeter load, hot air is blown out of an upper air blowing port 32 and then an interior part of a dwelling region 24 is directly heated. In turn, a difference between a room temperature and a set temperature is low and a perimeter load is low, all the hot airs are controlled in such a way as they are fed into a lower spacing 39. When a difference between the room temperature and the set temperature is low and the perimeter load is high, a vane of the air blowing dividing means 31 is driven in such a way as a part of the hot air blown toward the perimeter part is fed to the lower spacing 39 of a double floor 38 and the air is blown from an ventilation port 40.

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.

Conventional Technology In recent years, the comfort of the indoor environment created by air conditioners has come to be regarded as important.

As a conventional technique, for example, as shown in Japanese Utility Model Application Publication No. 613337, there is an air-conditioning/heating system that utilizes the space under the floor.

Hereinafter, a conventional air-conditioning device will be explained while referring 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 installed near the outer wall of the space 4. Reference numeral 6 denotes an air supply duct of the human 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 nullab 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. Reference numeral 1o denotes 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. 13
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 nullab 2a is heated by the warm 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 4 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 type air conditioner 5 is blown directly into the room 1 from the front air outlet 1o as shown in Figure 1o. 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, especially since 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 using the natural convection generated by the heat on the floor and radiation from the floor, there is a problem that heat loss to the floor is large and heating efficiency is low. Ta.

Additionally, it was not possible to deal with the cold draft (cold air convection) from the windows, especially during heating, which caused the feet of residents near the windows to feel cold.

The present invention solves the above-mentioned problems, and makes it possible to quickly bring the indoor temperature to the set temperature at the start of heating operation, and to improve heating efficiency. In addition, the present invention provides an air conditioner that has a configuration that can respond to changes in perimeter load (load near the window), prevents cold draft phenomena, and provides air conditioning that warms the feet and warms the head and feet.

Means for Solving the Problem In order to achieve this object, the air conditioner of the present invention calculates the helimeter load by the perimeter load calculation means based on the outputs of the indoor room temperature detection means and the perimeter temperature detection means, and calculates the helimeter load by using the perimeter load calculation means. Depending on the perimeter load, the blowout diversion means
The indoor unit is configured to be able to control the ratio of hot air volume from the upper 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.

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 upper outlet on the indoor side of the indoor unit by the blowout/distribution means to quickly warm up the room. Then, the perimeter load calculation means calculates the perimeter load based on the outputs of the indoor temperature detection means and the perimeter 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, the perimeter load is small (when the temperature of the perimeter section is close to the set temperature)
warm air is passed through the space under the double floor to keep your feet warmer. Conversely, when the perimeter load is large, a portion of the warm air is blown upward to correspond to the perimeter load. After the heating operation starts, the perimeter load is always calculated by the perimeter load calculation means based on the outputs of the indoor temperature detection means and the perimeter temperature detection means, and the upper and lower blowouts are performed by the blowout diversion means according to the magnitude of the perimeter load. Adjust the air volume balance. As a result, the appropriate air volume regulates the temperature of the perimeter area and also warms the floor from below, reducing the discomfort caused by the wind and creating 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. It is possible to produce υ.

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 nullab, 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 ff or less and a distance of 600 ff or more from the side wall (the space surrounded by the two-dot chain line in Fig. 2).

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

The indoor unit 25 has an indoor unit outer shell 27. Indoor unit heat exchanger 28
．． Blower 29 and casing 30. Blowout diverting means 3 having a fulcrum on the outer shell 27 and driven by an electric motor (not shown)
1, an upper air outlet 32° is provided on the upper surface, and a lower air outlet 33 is provided on the lower surface, which communicate with each other through an air passage 34 at the back of the indoor unit 25.

Further, a plurality of louvers 35 are provided at the upper blower outlet 32 so that the blower angle can be changed arbitrarily.

A suction port 36 is installed at the lower front of the indoor unit 25, and a room temperature sensor 37 for detecting the suction temperature is installed between the suction port 36 and the heat exchanger 28.

38 is a double bed, and 39 is a lower space formed by the bed nullap 22 and the double bed 38.

The lower air outlet 33 communicates with a lower space 39 .

Further, 4o is a ventilation hole that communicates with the room at the end where the double floor 38 and the side wall 21 join, and this position is as far away from the lower air outlet 33 as possible and within 600111 from the side wall 21. , a location that does not obstruct people's access or office furniture (such as a library) is optimal.

On the other hand, the outdoor unit 26 has an outdoor unit outer shell 42. Outdoor unit heat exchanger 43. Fan 44. Rear suction port 45° Front air outlet 46
is provided and connected to the indoor unit 25 via an expansion valve 47.

Further, a perimeter temperature detection means 48 is provided on the upper front surface of the indoor unit outer shell 27 to detect the temperature near the perimeter.

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

After turning on the power, the temperature of the room 1 is set (Tset) (step 49), and the cooling/heating mode is selected (step 60).

First, during heating operation, the room temperature sensor 37 detects x temperature Tr (step 51), and calculates the difference θ1 between the set temperature Tset and the detected room temperature Tr (step 52). Next, the outside temperature T0 is detected by the perimeter temperature detection means 48 (step 53), and the difference θ2 between the set temperature Tset and the detected outside temperature T0 is calculated.

Here, the case where θ2”Tse t-To)20℃ is satisfied (YES) and the case where it is not satisfied (No
) and determine whether there is a perimeter load (
Step 54). In other words, θ2>10°C is not satisfied (N
o) If the load on the beam meter is small, θ2〉
If 10°C is satisfied (YES), the load on the girth meter is large. Below, when the perimeter load is small (
The case where the perimeter load is large (referred to as A) and the case where the perimeter load is large (referred to as B) will be explained separately.

When the heperimeter load is small (No) (θ2>10℃
If the difference θ1 between the set temperature Tset and the room temperature Tr in step 62 satisfies θ1=Tset'rr>s°C (YES), the blow-off diversion means 31 is adjusted so that the top blow-off is 100%. (Fig. 3)
, close the air path 34 of the lower outlet 33 (step 55)
. In other words, when the living area 25 is cold, warm air is directly sent into the living area and the temperature is controlled to quickly approach the set temperature "set" (see the curved line arrow in Figure 2).

Next, when the temperature is 01≦5°C, the vane of the blowout diverting means 31 rotates upward so that the lower blowout is set to 100% (Fig. 1), and closes the air path 34 of the lower blowout port 32 (step 56).
.

As a result, all the warm air is blown out from the bottom, and the bottom air outlet 33
The hot air blown from the room passes through the lower space 39, advances to the ventilation opening 4o while warming the double floor 38, and is blown into the room 1. When the room temperature and the set temperature become close to each other, warm air is passed through the space 39 under the double floor 38 to warm the entire floor and realize radiant floor heating (solid line arrow in Figure 2).

(g) When the perimeter load is large (when θ2>10°C is satisfied) When the difference θ1 between the set temperature Tset and the room temperature Tr in step 52 is 01>10°C, the top blowout is 1o.

% (FIG. 3), and the air path 34 to the lower air outlet 33 is closed (step 55). When the living area 24 is cold, warm air is directly sent into the living area and controlled to quickly bring the temperature close to the set temperature "sHt" while responding to the perimeter load.

Next, when the temperature is 10≧01>5° C., the vane of the blow-off distribution means 31 rotates slightly upward so that the top blow-off is set to 7o% (step 57) and stops at the position 31a in FIG. 4. As a result, while directly heating the living area, the floor is heated, albeit slightly, and heating is also used from below.

In this case as well, although 30% of the air volume is consumed by downward blowing, the perimeter load is handled by upward blowing.

Then, when the temperature reaches 5≧θ1>2°C, the vane of the blowout diverting means 31 rotates upward so that the lower blowout is set to 70% and the upper blowout is set to 30% (step 58). It stops at the position shown in Figure 31b.

Unfortunately, since the room temperature has become quite close to the set temperature, we have reduced the proportion of direct heating of the living area 24 and switched to mainly floor heating. In this case, the ratio of top blowing is smaller than in the case of 1o≧θ1>5°C, but since the room temperature has risen to some extent, even if the ratio of top blowing is small, it can sufficiently cope with the perimeter load.

Then, when the temperature reaches 0152℃, the bottom blowout is 9Q% and the top blowout is 1Q%.
% (step 59), the blowout diverting means 3
The first vane rotates further upwards, and the fourth vane rotates further upwards.
It stops at the position shown in Figure 31c.

In other words, since the room temperature is almost the same as the set temperature, almost all of the hot air is blown out from the bottom, and the hot air blown from the bottom air outlet 33 passes through the lower space 39 and enters the ventilation hole 40 while warming the double floor 38. A portion of the hot air is blown directly into the chamber 1 from the upper blow-off port 32 in order to cope with the perimeter load. As a result, if the room temperature and the set temperature become close, the double bed 38. Warm air is passed through the lower space 37 to warm the entire floor to achieve radiant floor heating, while a portion of the warm air is also blown out from the upper outlet to cope with the perimeter load.

Next, during the cooling operation, the upper air blower is unconditionally controlled to 100% (step 55), and cold air is blown upward from the upper air outlet 32 (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. And the living area 2. After cooling the water, it is blown into the suction port 36 (
FIG. 3) According to the above embodiment, when the difference between the room temperature and the set temperature is large (for example, at the beginning of operation), the vanes of the blow-off diversion means 31 are driven, regardless of the magnitude of the perimeter load. Warm air is blown out from the air outlet 32 to directly heat the inside of the living area 24.

On the other hand, when the difference between the room temperature and the set temperature is small and the perimeter load is small, all of the hot air is controlled to be sent into the lower space 39, and when the difference between the room temperature and the set temperature is small and the perimeter load is small, If it is large, a part of the warm air blown to the girth meter section is sent to the lower space 39 of the double floor 38.
The vane of the blow-off/distribution means 31 is driven so that warm air is blown out from the ventilation port 40. Then, when the difference between the set temperature and the room temperature becomes smaller by l'', most of the warm air is sent into the lower space 39, and a part of the warm air is controlled to be blown out from the upper air outlet 32.

As a result, there is a heating effect due to natural convection from the entire surface of the heated double floor, a heating effect due to hot air blowing from the ventilation openings, and a hot air blowing from the lower air outlet that corresponds to the perimeter load when the perimeter load is large. Mild heating is possible due to the heating effect.

As a result, the startup performance during heating is good, and when it approaches steady operation, it can create a living space similar to that of underfloor heating, and it can also handle perimeter loads, so it is a type that heats the head and feet with almost no temperature distribution. This enables heating without discomfort.

In addition, during cooling, the cold air is blown upward from the upper outlet 32, hits the ceiling, and then naturally falls under its own weight, so a very uniform temperature distribution without the discomfort caused by the wind is obtained, resulting in high quality. air conditioning can be achieved.

In this example, the criterion for determining the magnitude of the load on the girth meter is 10°C.
In addition, the setting standards for the ratio of the blowout branch are 10℃, 5℃,
Although it is assumed to be 2°C, this value varies depending on room dimensions, load amount, etc., and is not definitive.

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. A ventilation hole communicating with the room is provided at the end of the double floor, and a perimeter load calculation means is provided for calculating based on the outputs of the indoor room temperature detection means and the perimeter temperature detection means. As a result, during heating operation, when the difference between the room temperature and the set temperature is large (such as when starting heating operation), all of the hot air is blown from the upper outlet by the blow-off diversion means regardless of the magnitude of the load on the beam meter, and the It directly heats the area and controls the temperature so that it quickly approaches the set temperature. On the other hand, when the room temperature rises and approaches the set temperature, if the perimeter load is small, all of the hot air is blown downward by the blow-off diversion means, the hot air warms the double floor, and is blown out from the ventilation openings. As a result, the effect of floor heating provides an ideal heated space with almost no temperature distribution, keeping the head cool and feet warm.

On the other hand, if the room temperature rises and approaches the set temperature and the perimeter load is large, the airflow dividing means changes the splitting ratio between the upper air outlet and the lower air outlet, diverting some of the warm air from the lower air outlet. Control it so that it is sent out. As a result, the warm air blown out from the upper outlet gradually warms the double floor while responding to the perimeter load, producing the effect of heating the feet. When the room temperature in the living area becomes almost equal to the coal feeding temperature, most of the hot air is blown downward by the blow-off distribution means, the double floor is warmed by the hot air, and a part of the hot air is blown out from the ventilation openings. Make it a speech bubble.

As a result, while dealing with the perimeter load through top air blowing, the effect of floor heating is also added, providing an ideal heating space with almost no temperature distribution and keeping 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.
3 and 4 are sectional views of essential parts of the air conditioner in each operating state, and FIG. 5 is a perspective view of the room in which the air conditioner is installed and in steady operation during heating when the perimeter load is large. FIG. 6 is a flowchart of the operation of the air conditioner,
Figure 7 is a cross-sectional view of a conventional air conditioner during heating, Figure 8 is a cross-sectional view taken along the line ■-■ in Figure 7, Figure 9 is a cross-sectional view taken along the line ■■ in Figure 8, and Figure 10 is a conventional air conditioner. Figure 11 is a cross-sectional view of the air conditioner during cooling.
0, FIG. 12 is a sectional view taken along line MM in FIG. 11, and FIG. 13 is a partially enlarged sectional view corresponding to FIG. 8. 25...Indoor unit, 26...Outdoor unit, 2
8... Indoor unit heat exchanger, 29... Blower, 31... Bath diversion means, 32...
Upper air outlet, 33... Air path, 37... Room temperature sensor, 38... Double floor, 39...
Lower space, 4o... Ventilation opening, 43...
Outdoor unit heat exchanger, 44...Fan, 45...
... Rear air intake, 46... Front air outlet, 47
. . . Expansion valve, 48 . . . Perimeter temperature detection means. Name of agent: Patent attorney Shigetaka Awano and 1 other person25
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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 In addition to providing a ventilation opening for communication, a room temperature detection means, a perimeter load calculation means that calculates based on the output from the temperature detection means (the inner part of the part facing the outside air such as a window or wall) and the output of the set temperature. An air conditioner characterized in that the air conditioner is provided with: and the blow-off diversion means is controlled based on the output of the perimeter load calculation means.