JPH04169738A - Air conditioning apparatus - Google Patents

Abstract

PURPOSE:To obtain an air conditioning apparatus capable of uniformizing the temperature distribution of an entire room in the vicinity of a floor surface by providing air direction adjusting means which is provided correspondingly to each blow-off outlet and can individually adjust the direction of blow-off air. CONSTITUTION:Once a power supply is turned on, a designated operation mode is inputted and stable time Ta in response to the operation mode is read out from a map, and as the stable time Ta is elapsed, data of blow-off temperatures t1, t2 are inputted from first and second blow-off temperature detection sensors 19, 24. Then, a blow-off set temperature difference DELTAt in response to the operation mode is read out from the stored map and the temperature difference DELTAt and a difference between the blow-off temperature t1 and the blow-off temperature are compared. If thereupon t1-t2 is smaller than t, then an air blow rate difference DELTAQ is read out from the map. Hereby, the revolutions of a first fan motor 12 and a second fan motor 14 are controlled to adjust air flow rates Q1, Q2, and a first flag 18 is adjusted downward to adjust a second flag 23 frontally thereof. Thus, temperature distribution near the door surface of an entire room can be made uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner, and more particularly to an air conditioner that prevents variations in temperature distribution near the indoor floor surface.

[Prior Art] As a conventional structure of an air outlet in this type of air conditioner, a technique disclosed in Japanese Patent Application Laid-Open No. 196041/1983 can be mentioned. FIG. 9 is a side sectional view of an indoor unit of a conventional air conditioner, FIG. 10 is a perspective view showing details of the air outlet of the indoor unit, and FIG. 11 is an exploded perspective view of the indoor unit.

In the figure, (41) is the casing of the indoor unit, (42)
is a suction port provided in the casing (41), (43) is a heat exchanger installed in the casing (41), (44)
is an air outlet, and (45) is the indoor air introduced into the casing (41) from the suction port (42) to a heat exchanger (43).
This is a cross-flow fan that blows air into the room from the air outlet (44) after passing through the air. Further, (46) is rotatably supported at both ends within the air outlet (44),
The auxiliary flap (48) is a main flap that is rotatably supported on the same axis on the indoor side of the auxiliary flap (47).

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

During heating, if the main flap (48) is adjusted in advance to approximately 45 degrees and the auxiliary flap (46) is adjusted to approximately vertical angle and the power is turned on, the room air will flow as the cross flow fan (45) rotates. It is introduced into the casing (41) through the suction port (42), reaches a high temperature in the heat exchanger (43), and is blown out into the room through the blowout port (44). At this time, part of the blowing air X flows along the main flap (48), and the other part of the blowing air Y is changed in angle downward by the auxiliary flap (46). Passing section (
47), the blown air Z flows along the main flap (48) similarly to the blown air X. Therefore, the two flaps (46, 48) divide the blown air into two directions: directly below the indoor unit and far away, thereby making the temperature distribution near the indoor floor more uniform.

[Problem to be solved by the invention] Since the structure of the air outlet in a conventional air conditioner is configured as described above, the temperature distribution near the floor directly below the indoor unit can be made uniform. However, the wind blown to a distant place rises up, and the temperature in the distant area tends to be lower than that directly below the indoor unit. Therefore, the temperature distribution near the floor surface throughout the room was never satisfactory.

In addition, comfort was not good in faraway areas, as warm air that should have reached the occupants' feet rose up and reached the occupants' heads.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an air conditioner that can equalize the temperature distribution near the floor surface of the entire room and can realize ideal heating for keeping the head cold and feet warm.

[Means for Solving the Problems] An air conditioner according to the present invention includes a plurality of heat exchangers connected in series, a plurality of air outlets provided corresponding to each of the heat exchangers, and each of the heat exchangers. A blowing means for blowing out the conditioned air that has passed through the heat exchanger into the room as blow-off air through each of the blow-off ports, and a wind direction adjustment device that is provided corresponding to each of the blow-off ports and can individually adjust the direction of the blow-out air. and means.

[Function] In the present invention, during heating of the air conditioner, the refrigerant compressed by the compressor circulates within each heat exchanger to increase the temperature of each. At this time, the heat exchanger near the compressor is kept at a high temperature by the heat of the refrigerant, so each heat exchanger has a different temperature, and as a result, the air is blown out from each outlet by the blower. The wind temperature also differs.

Therefore, the direction of each outlet air is adjusted by the wind direction adjustment means, and, for example, high-temperature outlet air is sent to the feet, and low-temperature outlet air is sent to the head to prevent the high-temperature outlet air from rising, thereby achieving a cold head and foot heat. It becomes possible to do so.

[Example code] The present invention will be explained in detail below.

FIG. 2 is a circuit diagram of the air conditioner of this embodiment.

In Fig. 2, (1) is the compressor of the outdoor unit that compresses refrigerant, (2) is the indoor unit installed indoors, and (3) is the compressor of the indoor unit 2 connected to the compressor (1). 1 heat exchanger, (
4) is a second heat exchanger of the indoor unit (2) connected in series to the first heat exchanger, and (5) is an expansion valve connected to the second heat exchanger (4). , (6) is the expansion valve (5
) connected to the evaporator.

FIG. 1 is a perspective view of an indoor unit (2) of an air conditioner.

In Fig. 1, (7) is the casing of the indoor unit (2) that houses the first and second heat exchangers (3, 4), and (8) is the casing of the indoor unit (2). air inlet, (
9) is a first air outlet provided on the lower side of the casing (7) so as to correspond to the first heat exchanger (3);
) is a second air outlet provided at the lower side of the casing (7) so as to correspond to the heat exchanger (4) of the front storage 2 as well.

Further, (11) is a first cross flow fan provided between the first heat exchanger (3) and the first air outlet (9) in the casing (7), and (12) is the first cross flow fan. A first fan motor (13) for rotationally driving a cross-flow fan (11) is provided between the second heat exchanger (4) and the second air outlet (10) in the casing (7). The second cross-flow fan (14) is a second fan motor that rotationally drives the second cross-flow fan (13).

Note that in this embodiment, the above-described first cross-flow fan (11) and second cross-flow fan (13) constitute a ventilation means.

FIG. 3 is a perspective view showing details of the air outlet (9, 10) of the indoor unit 2. FIG.

In FIG. 3, (15) are six first louvers (1
6) connects the first louver (15) with three interlocking rods (17).
), a pair of first louver motors (18) are rotatable up and down in front of the first louver (15) in the first air outlet (9). The first flap (19) is pivoted to the first air outlet (9)
This is a first blowout temperature detection sensor that detects the blowout temperature.

In addition, (20) are six second louvers that are pivotally attached to the second air outlet (10) so as to be rotatable left and right, and (21) are interlocking three second louvers (20) at a time. a pair of second louver motors that are independently rotated via a rod (22);
(23) is a second flap pivotably mounted on the front side of the second louver (20) within the second air outlet (10), and (24) is a second flap that is rotatably mounted up and down in the second air outlet (10). 10) is a second blowout temperature detection sensor that detects the blowout temperature.

In this embodiment, the first louver (15), the second louver (20), and the first flap (18) described above are used.
and the second flap (23) constitute a wind direction adjusting means.

FIG. 4 is a block diagram showing the electrical configuration of the air conditioner of this embodiment.

In FIG. 4, (25) is connected to the first outlet temperature detection sensor (19) and the second outlet temperature detection sensor (19) on the input side.
24) is connected, and drive circuits (26) to (29) are connected to the output side.
) through the first fan motor (12) and the second fan motor (14) and the first louver motor (16).
and a second louver motor (21) are connected to the control circuit of the air conditioner, (30) is connected to the output side of the control circuit (25) via the drive circuit (31), and the first flap The first flap motor (18) is connected to the control circuit (25) via the drive circuit (33), and the second flap motor (32) is connected to the control circuit (25) through the drive circuit (33). 2 flap motor.

The control circuit (25) has in advance a stability time Ta, a set blowout temperature difference Δt, and an air volume difference Δ corresponding to several types of operation modes.
A map for selecting the Q and stable total air volume Qs is stored, and each motor (1) is selected according to each selected value.
2, 14, 16, 21, 30, 32).

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

Compressor (1) during heating of the air conditioner of this embodiment
The refrigerant compressed in is first introduced into the first heat exchanger (3) to impart heat, and then transferred to the second heat exchanger (4).
) to impart heat. Figure 5 shows the Mollier diagram at that time. On the first heat exchanger (3) side, the refrigerant undergoes heat exchange in the superheat and two-phase flow region, that is, the high temperature region indicated by A, so the temperature is high. On the second heat exchanger (4) side, the refrigerant is kept at a low temperature because heat exchange is performed in the two-phase flow and subcooling region, that is, in the low temperature region indicated by B. Therefore, the blowing air U on the first heat exchanger (3) side
is high temperature, and the blown air V on the second heat exchanger (4) side is low temperature.

FIG. 6 shows the control circuit (2) when the air conditioner is powered on.
5) is a flowchart illustrating the processing executed by step 5).

Next, the operation of the air conditioner will be explained according to this flowchart. In addition, this flowchart.

The program shown in is called during the execution of another main program (not shown).

When the power of the air conditioner is turned on in step S1, the control circuit (25) enters the operating mode specified by the resident in step S2, and sets the stability time Ta corresponding to the operating mode in step S3. is read from the above map. Next, in step S4, the stabilization time Ta from the time the power is turned on is determined.
It is determined whether the stabilization time Ta has elapsed or not, and when the stabilization time Ta has elapsed, the first blowout temperature detection sensor (19
) and the second blowout temperature detection sensor (24), respectively.

As the above-mentioned stabilization time Ta, the heat exchanger (3
, 4) is expected to rise and reach an equilibrium state, and the temperature will reach an equilibrium state and the blowout temperatures tl, t
2 becomes stable, the wind direction control described later is performed.

Next, in step S6, the blowout setting temperature difference Δt corresponding to the operation mode is read from a pre-stored map. Then, in step S7, this blowout set temperature difference Δt is compared with the value obtained by subtracting the blowout temperature t2 from the blowout temperature t1 described above, and when tl−t2 is smaller than Δt (when the actual temperature difference is small), In step S8, the air volume difference ΔQ is read from the map described above, and the process proceeds to step S9.

Then, in step S9, the first fan motor (12
) and the rotation speed of the second fan motor (14),
The air volumes Ql and Q2 are adjusted so that the air volume Q1 of the first blown air U is larger than the air volume Q2 of the second blown air V by ΔQ. Further, as shown in FIGS. 3 and 7, the first flap motor (30) is driven and controlled to adjust the first flap (18) downward, and the second flap motor (32) is driven. Control the second flap (23)
Adjust it so that it faces forward. Furthermore, the first louver motor (
16) and the second louver motor (21) to direct both the louvers (15, 2°0) inwardly so that the blowing winds U and V intersect, and the first louver (1
5) are enlarged three by three to expand the range of the first blowout air U.

Thereafter, in step S10, when tl-t2 becomes equal to Δt, the process ends, and when they are not equal, the step S
Returning to step 7, tl-t2 and Δt are compared again.

Further, when tl-t2 is larger than Δt in step S7 (when the actual temperature difference is large), step S11
Then, the rotational speed of the first fan motor (12) and the second fan motor (14) is controlled to adjust the air volume Q1 of the first blown air U and the air volume Q2 of the second blown air V. Adjust evenly. At the same time, the first flap motor (30) and the second flap motor (32) are driven and controlled to direct both flaps (18, 23) downward, and the first louver motor (16) and the second louver motor The motor (21) is driven and controlled to direct both louvers (15, 20) in the same direction.

When tl-t2 becomes equal to Δt in step SIO, the process ends, and when they are not equal, the process returns to step S7 and tl-t2 and Δt are compared again.

On the other hand, when tl-t2 is equal to Δt in step S7, the total air volume Qs at stable time is determined from the map in step S12.
is read and the process moves to step 813. Then, in step 813, the rotation speeds of the first fan motor (12) and the second fan motor (14) are controlled, and the air volume Q1 of the first blown air U and the air volume Q2 of the second blown air V are adjusted. are both ΔQ
The image style volumes Ql and Q2 are adjusted so that they become half of the above. Further, as shown in FIGS. 3 and 7, the first flap motor (30) is drive-controlled to adjust the first flap (18) downward, and the second flap motor (32
) to adjust the second flap (23) to face the front. Furthermore, the first louver motor (16) and the second louver motor (21) are driven and controlled so that both louvers (15° 20) are directed inward to each other so that the blowing winds U and V intersect. The louvers (15) are reduced in size three by three to narrow the range of the first blown air U, and the process ends.

Therefore, when the actual temperature difference t1-t2 is smaller than Δt in step S7, the air volume Q1 of the first blown air U is increased than the air volume Q2 of the second blown air V in step S9. The temperature t1 is gradually increased to tl
-t2 itself also increases and approaches Δt. Further, when the actual temperature difference tl-t2 is larger than Δt, step S1
1, the air volume Q1 of the first air outlet U is reduced until it becomes equal to the air volume Q2 of the second air outlet V, so the first air outlet temperature t1 is gradually lowered and tl-t2 itself is also reduced. Δ
approach t.

As a result, the difference between the first blowout temperature t1 and the second blowout temperature t2 is always maintained near the predetermined air volume difference dt. and,
As shown in FIG. 8, in step 813, the high temperature first blown air U is blown downward by the first flap 18, that is, near the floor surface of the room R, and the low temperature second blown air is blown out. The second flap (23) blows out the air to the front, that is, near the occupant's head, and the low-temperature air V prevents the first air U from rising, so that the air inside the room is The temperature distribution near the floor surface of R will be made uniform.

In this way, the air conditioner of the above embodiment is provided with the first and second heat exchangers (3, 4) connected in series corresponding to the side heat exchangers (3, 4), respectively. the first and second air outlets (9, 10), and the side heat exchanger (3, 4).
) The conditioned air that has passed through the respective outlets (9, 10)
first and second cross-flow fans (11, 14) that blow air into the room as first and second blowing air through the
and first and second louvers (15, 20) that are provided corresponding to the two secondary outlets (9, 10) and that can individually adjust the wind direction of the first and second blowing air; and second flaps (18, 23).

Therefore, in the above embodiment, the respective wind directions of the high-temperature air blown by the first heat exchanger (3) and the low-temperature blown air from the second heat exchanger (4) are controlled by the first and second louvers (
15, 20) and flaps (18, 23) allow for individual adjustment. As a result, it is possible to blow out the high-temperature first blow-out air U near the floor surface, and blow out the low-temperature second blow-off air V near the head of the occupant, thereby realizing a cold head and feet heat. The blown air V prevents the high temperature first blown air U from rising, thereby making it possible to equalize the temperature distribution near the floor surface.

By the way, the heat exchanger of the above embodiment has two
Although the present invention is configured as one heat exchanger (3, 4), the present invention is not limited to this, and three or four heat exchangers may be provided. However, if there are at least two types of blowing air with different temperatures, the above-mentioned cold head and foot heat can be achieved, and if two exchangers are used, the manufacturing cost will be reduced compared to three or four exchangers. .

Further, the wind direction adjustment means of the above embodiment includes first and second louvers (15, 20) that adjust the wind direction in the left and right directions;
The first and second flaps (
18, 23), but when carrying out the present invention, the present invention is not limited to this, and if the direction of the blowing air can be arbitrarily adjusted, the direction of the wind may be adjusted diagonally. It may also be configured as a louver for adjusting.

Furthermore, the wind direction adjustment means of the above embodiment includes a control circuit (25).
It is configured as louvers (15, 20) and flaps (18, 23) whose wind direction is automatically adjusted by a motor (16, 21° 30, 32) controlled by, or when implementing the present invention, , but not limited to these louvers (15, 20) and flaps (18,
23) may be configured to be manually operated.

[Effects of the Invention] As described above, the air conditioner of the present invention includes a plurality of heat exchangers connected in series, a plurality of air outlets provided corresponding to each of the heat exchangers, and each of the heat exchangers. A blowing means for blowing out the conditioned air that has passed through the heat exchanger into the room as blow-off air through each of the blow-off ports, and a wind direction adjustment device that is provided corresponding to each of the blow-off ports and can individually adjust the direction of the blow-out air. Since the wind direction of each heat exchanger has a different temperature, it is possible to adjust the wind direction of each heat exchanger individually using the wind direction adjusting means, so that the high temperature wind is blown near the floor surface, and the low temperature wind is directed toward the occupants. If the air is blown out near the head of the room, it is possible to equalize the temperature distribution near the floor surface of the entire room, and to achieve ideal heating for cold heads and warm feet.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention, FIG. 2 is a circuit diagram of an air conditioner according to an embodiment of the present invention,
FIG. 3 is a perspective view showing details of the air outlet of the indoor unit of the air conditioner according to the embodiment of the present invention, FIG. 4 is a block diagram showing the electrical configuration of the air conditioner according to the embodiment of the present invention, and FIG. The figure is a Mollier diagram of an air conditioner according to an embodiment of the present invention, FIG. 6 is a flowchart showing the processing executed by the control circuit of the air conditioner according to an embodiment of the present invention, and FIGS. 7 and 8 are a diagram according to the present invention. 9 is a side sectional view of the indoor unit of the conventional air conditioner, and FIG. 10 is a side sectional view of the indoor unit of the conventional air conditioner. FIG. 11 is an exploded perspective view showing details of an air outlet of an indoor unit of a conventional air conditioner. In the figure, 3: first heat exchanger, 4: second heat exchanger 9: first outlet 10: second outlet 11: first cross flow fan (air blowing means) 13: second cross flow fan (air blowing means) 15: first louver (air direction adjustment means) 18: first flap (air direction adjustment means) 20: second louver (air direction adjustment means) 23: second flap (air direction adjustment means) means). In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts. Agent: Patent attorney Masuo Oiwa and two others Figure 7 Figure 9 Figure 11

Claims (1)

[Scope of Claims] A plurality of heat exchangers connected in series, a plurality of air outlets provided corresponding to each of the heat exchangers, and a plurality of air conditioning air passing through each of the heat exchangers, which An air conditioner comprising: a blowing means for blowing air into the room through an outlet; and a wind direction adjusting means, which is provided corresponding to each of the blowing outlets and can individually adjust the direction of the blowing air. .