JPH09264557A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To plan to obtain such a room temperature distribution at the time of heating as to correspond to an air-conditioned state of higher temperature head side with lower temperature foot side and to make room temperature distribution at the time of cooling uniform by vertically arranging a plurality of heat exchangers on an upstream side of an air supply duct and vertically arranging a plurality of blower on a downstream side of the air supply duct. SOLUTION: A first set and a second set of flat-plate-shaped air heat exchangers 5A, 5B extending diagonally in an air supply space inside of an air inlet corner are installed independently of each other in two steps in a vertical direction behind an air inlet in an upstream side of an air supply duct. A first set and a second set of blowers 6A, 6B constituted of e.g. cross-flow fans are installed independently of each other in two steps in a vertical direction in an inside of an air outlet in a downstream side of the air supply duct. At the time of cooling, a large volume of low temperature air is blown to a head side and a small volume of comparatively higher temperature air is blown to a foot side to prevent foot side from being excessively cooled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an air conditioner suitable for forming a comfortable environment.

[0002]

2. Description of the Related Art In an air conditioner having a blowing function as represented by, for example, a heat pump type air conditioner, high temperature air during heating tends to gather near the ceiling and the air temperature on the floor side is unlikely to rise. There's a problem. For this reason, it is difficult to realize a comfortable cold room temperature, which is a comfortable room temperature distribution. On the contrary, during cooling, low-temperature air tends to collect at the feet, and the feet tend to be too cold.

Therefore, conventionally, for example, Japanese Patent Laid-Open No. 4-222
As can be seen in Japanese Patent No. 332, in an indoor unit of a wall-mounted heat pump type air conditioner, the blower and the air outlets thereof are horizontally arranged and provided in upper and lower two stages, and a lower part of a common heat exchanger. By connecting the refrigerant inflow path to the side and the refrigerant outflow path to the upper side,
There is also an air conditioner that achieves a room temperature distribution close to a head cold foot heat condition by making a relative difference in the temperature of the heat exchange air blown out from the upper and lower outlets during heating, raising the lower side temperature and lowering the upper side temperature. Proposed.

Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 1-234725, in a floor-standing type indoor unit of a heat pump type air conditioner, a vertically long casing structure is adopted, and a heat exchange which is vertically long is provided at the inner front portion thereof. A pair of vertically long cross-flow fans, which are located on the left and right sides of the heat exchanger, are also provided, and the entire room is covered by a pair of vertically long air outlets provided on the left and right sides of the casing. It has also been proposed that the room temperature distribution in the vertical direction be made uniform by blowing a curtain-shaped warm air having a wide width in the vertical direction.

[0005]

However, in the former one of the above-mentioned conventional examples, the heat exchanger itself has a single structure, and there is a difference in heat exchange temperature between the inlet side and the outlet side of the refrigerant. Even if it is only a slight difference, it is not possible to control the difference arbitrarily, even up to the action of suppressing the rise of warm air blown out from the lower air outlet by the air blown out from the upper air outlet You can't expect. Therefore, it is difficult to actually realize the room temperature distribution corresponding to the head cold foot heat state.

Further, in the same construction, since the cross flow fans are respectively arranged in the horizontal direction, the warm air blown from both the upper and lower air outlets becomes a horizontal flow, and the whole room having a vertical width is provided. The airflow cannot be expanded, and the user is likely to be blown directly by the user to have a dry feeling of the head, and the warm air is likely to float upward.

On the other hand, in the latter case, the warm air which is located below the air-conditioned space and has a considerable width in the vertical direction can be spread over the entire room. Although it is possible to distribute warm air that does not give a dry feeling to the air, since the temperature and volume of the hot air blown out are constant in the vertical direction, it is still impossible to suppress the rising of the hot air itself. It is difficult to effectively achieve a head cold foot heat state.

[0008]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above problems, and is provided with the following means for solving the problems.

That is, in the air conditioner of the present invention, for example, as shown in FIGS. 1 to 5 and 11, a vertically long main body casing 1 and an air suction port 2 provided in the front portion of the main body casing 1. An air outlet 3 provided at one side of the air inlet 1 of the body casing 1, and an air passage 4 provided from the air inlet 2 to the air outlet 3 in the body casing 1. , A plurality of heat exchangers 5A, which are located on the upstream side of the air passage 4 and are provided above and below,
5B, and a plurality of blowers 6A and 6B that are located on the downstream side of the blower passage 4 and that are vertically provided.

Further, in this structure, a pressure reducing valve 7 made of, for example, a motor-operated valve is provided in the middle of the refrigerant pipe 9 connecting the upper and lower heat exchangers 5A and 5B. The pressure reducing valve 7 controls the mutual refrigerant pressure so that, for example, the heat exchange capacities of the upper and lower heat exchangers 5A and 5B are different in correspondence with heating and cooling.

The plurality of upper and lower blowers 6A and 6B having the above-mentioned structure are configured such that the number of revolutions of each of them is independently variable and the amount of blown air can be controlled.

As a result, in the air conditioner of the present invention, the air blown out from the air outlet 3 has different blowing temperature and blowing air amount in the upper portion 3A and the lower portion 3B, respectively. It becomes possible to variably control the air temperature, for example, air with a high temperature during heating blows out toward the floor with a large air flow rate (high air speed), while air with a low temperature blows out toward the ceiling with a small air flow rate (low air speed). To be done.

Therefore, the temperature distribution in the air-conditioned space is in a head cold foot heat state in which the lower portion on the floor surface side is higher and the upper portion on the ceiling side is lower.

In the case of the above construction, the main body casing 1 of the indoor unit itself is considerably vertically long, and the plurality of air heat exchangers 5A and 5B and the blowers 6A and 6B are also sufficiently vertically long. Since it is possible to form a wide vertical air flow along the side wall surface of the air-conditioned space that surrounds the entire room instead of the horizontal flow as in the conventional example, warm air blows directly to the user. It is not attached, and the dry feeling can be greatly reduced.

On the other hand, at the time of cooling, by making the blower air volumes have an inverse relationship, a large amount of low temperature air can be blown upward and a small amount of relatively high temperature air can be blown downward in the same manner. It is possible to prevent too cold.

Next, in the air conditioner of the present invention, as shown in, for example, FIGS. 12 to 16 and 20, a vertically long main body casing 1 and an air suction port provided in the front portion of the main body casing 1. 2 and air outlets 3a provided on both left and right sides of the air inlet 2 of the main body casing 1,
3b, blower passages 4a and 4b provided from the air suction port 2 in the main body casing 1 to the left and right air outlets 3a and 3b, and they are located on the upstream side of the blower passages 4a and 4b, respectively, and are vertically arranged. Multiple heat exchangers 5A and 5B
And a plurality of blowers 6A, 6B, 6C and 6D which are located on the downstream side of the blow passages 4a and 4b and which are provided vertically.

Further, in this structure, a pressure reducing valve 7 made of, for example, a motor-operated valve is provided in the middle of the refrigerant pipe 9 connecting between the upper and lower heat exchangers 5A and 5B. The pressure reducing valve 7 appropriately controls the mutual refrigerant pressure so that, for example, the heat exchange capacities of the heat exchangers 5A and 5B are different in correspondence with heating and cooling.

Further, the upper and lower blowers 6A, 6B and the blowers 6C, 6D are individually and independently variable in rotation speed, and the blow rate can be controlled.

As a result, in the air conditioner of the present invention, the air outlets 3a on the left and right of the body casing 1 are
The air blown out from 3b can be variably controlled by the upper portion 3U and the lower portion 3D, respectively, so that the blowing temperature and the blowing air amount can be variably controlled differently. A large air volume (high wind speed) blows toward the floor, while air with a low temperature is blown toward the ceiling at a small air volume (low wind speed).

Therefore, the temperature distribution in the air-conditioned space is high in the lower part on the floor surface side and low in the upper part on the ceiling side, which is a cold head heat condition.

Further, in the case of the above construction, the main body casing 1 of the indoor unit itself is considerably long vertically, and the air heat exchangers 5A, 5B and the blowers 6A, 6B, 6C, 6D are also sufficiently vertically long. Therefore, it is possible to form a large air flow with a wide width in the vertical direction along the side wall surface of the air-conditioned space that surrounds the entire room, rather than the horizontal flow as in the conventional example, so that warm air can be delivered to the user. It is not directly sprayed, and the dry feeling can be greatly reduced.

On the other hand, at the time of cooling, by making the blower air volumes have an inverse relationship, a large amount of low temperature air can be blown out upward and a small amount of relatively high temperature air can be blown out in a similar state. It is possible to prevent too cold.

[0023]

As a result of the above, according to the air conditioner of the present invention, it is possible to accurately achieve both head cold foot heat during heating and uniform temperature during cooling, and it is suitable for forming a comfortable environment close to ideal. .

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIGS. 1 to 8 show the configuration of an indoor unit of, for example, a heat pump type air conditioner according to Embodiment 1 of the present invention.

In the figure, reference numeral 1 is a main body casing of the indoor unit, and the main body casing 1 is the same as that shown in FIGS.
As shown in FIG. 7, for example, when it is installed on the floor (see FIG. 7), it is formed in a slim cassette shape which is long in the vertical direction and reaches the middle position in the vertical direction of a room having a general size. An air intake port 2 of a grill structure having a plurality of slits parallel to the vertical direction is provided continuously from the left side portion on the front side in the figure to the central portion of the front portion continuously in the vertical direction. The corner portion from the right end portion of the air intake port 2 of the front portion to the right side surface portion in the drawing is bulged in an arc shape, and the air outlet port 3 is continuously provided in the entire vertical direction.

On the other hand, as shown in FIG. 3, an air passage 4 extending from the air inlet 2 to the air outlet 3 is provided in the main body casing 1, and the air on the upstream side of the air passage 4 is provided. Behind the suction port 2, as shown in the drawing, two flat plate-shaped first and second sets of air heat exchangers 5A and 5B are separated from each other and extend diagonally in the air blowing space inside the air suction port corner portion. Two independent blowers 6A and 6B, which are, for example, a cross flow fan, are provided in the upper and lower two stages, and inside the air outlet 3 on the downstream side of the blower passage 4, the upper and lower two blowers 6A and 6B are provided.
The columns are provided separately from each other.

The first and second air heat exchangers 5A, 5B
Are respectively installed in series in the indoor unit side refrigerant circuit in the refrigerating circuit of the air conditioner as shown in FIG. 6, and in the middle of the refrigerant pipe 9 connecting the heat transfer tubes to each other, for example, electric A pressure reducing valve 7 composed of a valve is provided. Then, the pressure reducing valve 7 is connected to each other during heating or cooling so that the heat exchange capacities of the first and second air heat exchangers 5A and 5B are different from each other as shown in FIG. Refrigerant pressure is controlled. Specifically, for example, during heating, the upper first air heat exchanger 5A side is decompressed by a predetermined pressure to provide a lower level of heat exchange capacity, while during cooling, the opposite is true.

In FIG. 6, reference numeral 11 is an outdoor unit side blower, 12 is an outdoor unit side air heat exchanger, 13 is the same compressor, 14 is a four-way switching valve, 15 is a closing valve, and 16 is a main pressure reducing valve. The valve is shown.

The first and second blowers 6A and 6B are also provided.
In the case of the present embodiment, for example, as shown in FIG. 5, the lower end side of the first blower 6A and the upper end side of the second blower 6B are formed so as to be mutually V-shaped toward the air blowing direction. Are rotatably installed in a state in which they are respectively deviated toward the front side. Then, these first and second blowers 6A, 6
B is provided with dedicated drive motors 7A and 7B whose rotational speeds are independently controlled with respect to their respective rotary shafts, and it is possible to individually and independently control the air flow rate.

As a result, in the indoor unit according to the present embodiment, the air blown out from the air outlet 3 has different blowout temperature and blowout air amount in the upper portion 3A and the lower portion 3B, respectively. It becomes possible to variably control the temperature of the air blower, and the direction of the air blowout corresponds to the inclination angles of the first and second blowers 6A and 6B as shown in FIG. High air is blown toward the floor with a large air flow rate (high wind speed), while air with a low temperature is blown toward the ceiling with a small air flow rate (low wind speed).

Therefore, the temperature distribution in the air-conditioned space is in a head cold foot heat state in which the lower portion on the floor surface side is high and the upper portion on the ceiling side is low.

In the case of the above construction, the main body casing 1 of the indoor unit itself is considerably vertically long, and the first and second air heat exchangers 5A and 5B and the first and second blowers 6 are provided.
Since each of A and 6B is also sufficiently long in the vertical direction, not a horizontal flow as in the conventional example, but an air flow having a width in the vertical direction along the side wall surface of the air-conditioned space that surrounds the entire room is formed. Therefore, the warm air is not blown directly to the user, and the dry feeling can be greatly reduced.

On the other hand, at the time of cooling, by making the blower air volumes have an inverse relationship, a large amount of low temperature air can be blown upward and a small amount of relatively high temperature air can be blown downward, which prevents the feet from becoming too cold. can do.

By the way, the indoor unit of the present embodiment configured as described above is, for example, as a wall-hanging type which is used by hanging it on a wall as shown in FIG. 7 or a floor which is used by being placed on the floor as shown in FIG. As the stationary type, any mounting type can be freely adopted. Then, in any of the cases, the above-described effects can be obtained in exactly the same manner.

(Modification 1) The overall shape of the main body casing 1 in the present embodiment is replaced with the shape shown in FIG. 3 and is, for example, a flat cylindrical shape as shown in FIG. Correspondingly, the inner air heat exchanger 5A,
5B can also be rounded.

(Modification 2) The two-stage air heat exchangers 5A and 5B in the present embodiment are replaced by, for example, two sets of external shape-separated independent ones as shown in FIG.
As shown in FIG. 1, even if the outer shape is integrated, it is functionally separated and independent by interposing an electric type pressure reducing valve 7 similar to the one described above in the middle of the heat transfer tube 10 in the middle thereof. It can also be structured.

At the same time, the blowers 6A and 6B may be arranged coaxially and straightly as shown in FIG. 11 without being inclined to each other in a dogleg shape.

(Embodiment 2) FIGS. 12 to 20 show the construction of an indoor unit of, for example, a heat pump type air conditioner according to Embodiment 2 of the present invention.

In the figure, reference numeral 1 is a main body casing of the indoor unit, and the main body casing 1 is, as shown in FIGS. 12 and 13, generally used when it is installed on the floor (see FIG. 17). It has a slim cassette shape that is long in the vertical direction and reaches the middle of the room in the vertical direction. Then, on the front face side of the figure, the air intake port 2 of a grill structure having a large number of slits parallel to the vertical direction is provided continuously in the entire vertical direction,
Further, first and second air outlets 3a and 3b are respectively provided continuously in the vertical direction at the arc-shaped corners on both sides of the air inlet 2 in the front portion.

On the other hand, in the main body casing 1, FIG.
As shown in FIG. 1, the first and second blower passages 4 extending from the air inlet 2 to the left and right first and second air outlets 3a and 3b, respectively.
a and 4b are provided, and the first and second ventilation passages 4 are provided.
a, 4b Behind the air suction port 2 of the upstream side collecting portion,
As shown in the figure, two sets of flat plate-shaped air heat exchangers 5A and 5B are provided in upper and lower two stages independently of each other, and the first and second air passages 4a and 4b are also provided. Inside the first and second air outlets 3a, 3b on the downstream side, there are two sets of blowers 6A, 6B, 6C, 6D each consisting of a cross flow fan, namely, a first, a second, a third, and a fourth. The upper and lower stages are provided separately from each other.

The first and second air heat exchangers 5A and 5B
Are also incorporated in the refrigeration circuit of the air conditioner as shown in FIG. 6, for example, and a pressure reducing valve formed of, for example, an electric valve is provided in the middle of the refrigerant pipe 9 connecting the heat transfer tubes to each other. 7 is installed. Then, the pressure reducing valve 7 corresponds to each of heating and cooling, similarly to the case of the above-described first embodiment, for example, the heat exchange capacity of each of the first and second air heat exchangers 5A and 5B. The mutual refrigerant pressures are controlled so that

The first and second blowers 6A, 6B are also provided.
In the case of the present embodiment, the third and fourth blowers 6C and 6D are rotatably installed so as to be coaxial with each other in the vertical direction, as shown in FIG. 15, for example. Then, these first, second, third, and fourth blowers 6A, 6
B, 6C, and 6D are drive motors 8A, 8B, 8C, and 8 for exclusive use whose rotation speeds are independently controlled with respect to their respective rotation axes.
D is provided, and it is possible to individually and independently control the air flow rate.

As a result of the above, in the indoor unit of the present embodiment, the air blown from the first and second air outlets 3a, 3b on the left and right of the main body casing 1 has an upper portion 3U and a lower portion, respectively. With 3D, it becomes possible to variably control the blowout temperature and the blown air volume individually, and, for example, as shown in FIG. 17, high temperature air during heating has a large blown air volume (high wind speed). On the other hand, air having a low temperature is blown toward the floor with a small air volume (low wind speed) toward the floor.

Therefore, the temperature distribution in the air-conditioned space is high in the lower part on the floor surface side and low in the upper part on the ceiling side, which is a head cold foot heat state.

In the case of the above construction, the main body casing 1 of the indoor unit itself is long in length, and the first and second air heat exchangers 5A and 5B and the first, second, third and fourth air heat exchangers 5A and 5B are used.
Since each of the blowers 6A, 6B, 6C, and 6D is also sufficiently long vertically, it is not a horizontal flow like the conventional example, but along the side wall surface of the air-conditioned space that surrounds the entire room as shown in FIG. 18, for example. In addition, since a large curtain-shaped air flow having a width in the vertical direction can be formed, warm air is not blown directly to the user, and the dry feeling can be greatly reduced.

On the other hand, when the air flow rate of the blower is reversed due to the height difference between the heat exchange temperatures of the first and second air heat exchangers 5A and 5B even during cooling, the low air flow rate is increased upward. A small amount of relatively high temperature air can be blown out downward, and it is possible to prevent the feet from becoming too cold.

By the way, the indoor unit of the present embodiment configured as described above is not only used by placing it in the center of the wall surface of the room as shown in FIG. 18, but also as shown in FIG. It can also be used by placing it on. Then, in such a case, as shown in the drawing, the air volume of the air outlet 3a on the side wall surface side is made small, and the air outlet 3 on the opposite side is formed.
By increasing the air flow rate of b, it is possible to obtain substantially the same operation as in FIG.

(Modification 1) The upper and lower two stages of the first and second air heat exchangers 5A and 5B in the present embodiment are as follows.
In place of the two sets having independent external shapes as shown in FIG. 15, for example, as shown in FIG. It is also possible to form a functionally separated structure by interposing an electric pressure reducing valve 7 similar to that described above.

(Modification 2) In the above embodiment,
The air heat exchanger is formed so as to be commonly used for the upper and lower two sets of blowers 6A, 6B, 6C and 6D by the upper and lower two stages 5A and 5B. As shown in FIG. 21, the left and right blowers 6A, 6B, 6
It is also possible to have a configuration of four sets of upper and lower two stages of the first and second air heat exchangers 5A and 5B, and the third and fourth air heat exchangers 5C and 5D, which correspond individually to C and 6D. .

(Embodiment 3) FIGS. 22 to 25 show the construction of an indoor unit of, for example, a heat pump type air conditioner according to Embodiment 3 of the present invention.

In FIG. 22, reference numeral 1 is a main body casing of the indoor unit, and the main body casing 1 has a general size when it is installed on the floor, for example, as in the case of each of the above-described embodiments. It has a slim cassette shape that is long in the vertical direction so as to reach the vertical middle position of the room. The front air inlet 2 of the grill structure having a large number of slits parallel to the vertical direction is provided continuously in the entire vertical direction on the front air side in the figure. First and second air outlets 3a and 3b are respectively provided continuously in the vertical direction at arc-shaped corners on both sides of the mouth 2.

On the other hand, inside the main body casing 1, FIG.
As shown in FIG. 1, the first and second blower passages 4 extending from the air inlet 2 to the left and right first and second air outlets 3a and 3b, respectively.
a and 4b are provided, and the first and second ventilation passages 4 are provided.
a, 4b Behind the air suction port 2 of the upstream side collecting portion,
As shown in the figure, two pairs of first and second air heat exchangers 5A and 5B having a flat plate-like function are integrally provided in appearance so as to extend in the entire vertical direction, and the first and second air blowers are also provided. Passage 4a,
Inside the first and second air outlets 3a and 3b on the downstream side of 4b, two sets of blowers 6a and 6b, which are cross-flow fans, are provided so as to extend in the entire vertical direction. .

The first and second air heat exchangers 5A and 5B
Is also incorporated in the refrigeration circuit of the air conditioner as shown in FIG. 6, for example, and a pressure reducing valve such as an electric valve is provided in the middle of the refrigerant pipe connecting the heat transfer tubes to each other. It is installed (not shown). In the case of the present embodiment, the pressure reducing valve corresponds to each of the first and second air heat exchangers 5A and 5B in the same manner as in the above-described first and second embodiments, particularly corresponding to only during cooling. The mutual refrigerant pressures are controlled so that the heat exchange capacities are different.

The first and second blowers 6a and 6b are also provided.
Are provided with dedicated first and second drive motors 8a and 8b whose rotational speeds are independently controlled for their respective rotary shafts, and it is possible to individually and independently control the air flow rate. ing. On the other hand, the left and right two sets of the first and second ventilation passages 4
As shown in, for example, FIGS. 23 and 25, on the left and right sides of the duct rear surface side convex portion 30 that divides a and 4b, the first air heat exchanger 5B is formed corresponding to the height of the lower second air heat exchanger 5B. , And second rod-shaped heaters Ha and Hb are provided. Each of the first and second rod-shaped heaters Ha and Hb can independently control the amount of heat generation.

As a result, in the indoor unit of the present embodiment, the air blown out from the first and second air outlets 3a and 3b on the left and right of the main casing 1 during heating is, for example, the first and first air. By appropriately turning on the two heaters Ha and Hb, the upper part 3U and the lower part 3D of the heater can be variably controlled to have different blowout temperatures. For example, as shown in FIG. As shown in, the air having a particularly high temperature during heating, which is heated by the first and second heaters Ha and Hb, has a relatively high temperature in the floor surface direction while the temperature of only the first air heat exchanger 5A is relatively high. Low air is blown toward the ceiling.

Therefore, the temperature distribution in the air-conditioned space is in an effective head cold foot heat state in which the lower portion on the floor surface side is high and the upper portion on the ceiling side is low.

In the case of the above construction, the main body casing 1 of the indoor unit itself is considerably long vertically, and the first and second air heat exchangers 5A, 5B and the first and second blowers 6 are provided.
Since each of a and 6b is also vertically long, it is not a horizontal flow as in the conventional example, but the vertical widths along the side wall surface of the air-conditioned space that surrounds the entire room as shown in FIG. 18, for example. Since it is possible to form a large curtain-like air flow, there is no possibility that the warm air is blown directly to the user, and the dry feeling can be greatly reduced.

On the other hand, even during cooling, due to the difference in heat exchange temperature between the first and second air heat exchangers 5A and 5B, low temperature air is blown upward and relatively high temperature air is blown downward. It is possible to prevent the feet from getting too cold.

By the way, the indoor unit of the present embodiment configured as described above is of course not only used in the center of the wall surface of the room as shown in FIG. 18, but also, for example, as shown in FIG. It can also be used by placing it on. And
In such a case, the left and right first and second
By appropriately variably controlling the number of rotations of the blowers 6a and 6b of FIG.
As shown in FIG. 9, by setting the air flow rate of the air outlet 3a on the side wall surface side to be small and the air flow rate of the air outlet 3b on the opposite side to be large, it is possible to obtain substantially the same operation as in the case of FIG.
Further, particularly during heating, by controlling the heat generation amounts of the first and second rod-shaped heaters Ha and Hb together with that, it is possible to form a more effective temperature difference.

(Modification 1) Considering that the first and second air heat exchangers 5A and 5B in the present embodiment are functionally independent of each other, in the above configuration, for example, during heating. Also, the first and second air heat exchangers 5A,
It is also possible to form a temperature difference in the vertical direction by 5B and heat the temperature difference by the first and second rod-shaped heaters Ha and Hb to increase the temperature difference. In this case, the first and second rod-shaped heaters Ha and Hb function as auxiliary heaters.

On the other hand, the upper and lower two-stage first and second air heat exchangers 5A and 5B in the present embodiment have a temperature difference due to the first and second rod heaters Ha and Hb only during heating, for example. Needless to say, it is not necessary that the two sets are functionally independent as described above as long as the forming action is sufficient, and both the functional and external shapes may be integral.

(Modifications Common to Each Embodiment)
The pressure reducing valve 7 in each of the above embodiments can also be formed by, for example, a capillary tube. Also,
Each of the blowers 6A to 6D can be replaced with a sirocco fan.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of an indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a side view of the indoor unit.

FIG. 3 is a cross-sectional view of the indoor unit.

FIG. 4 is a schematic view showing an installed state of an air heat exchanger in the indoor unit.

FIG. 5 is a schematic diagram showing an installation state of a blower in the indoor unit and an amount of blown air.

FIG. 6 is a refrigeration circuit diagram of the air-conditioning apparatus according to Embodiment 1 of the present invention.

[Fig. 7] Fig. 7 is a schematic diagram showing an installation form when the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention is configured as a wall-mounted type.

[Fig. 8] Fig. 8 is a schematic diagram showing an installation form when the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention is configured as a floor-standing type.

FIG. 9 is a Mollier diagram showing heating characteristics corresponding to changes in refrigerant temperature during heating of the indoor unit.

FIG. 10 is a sectional view similar to FIG. 3 showing the configuration of Modification 1 of the indoor unit.

FIG. 11 is a schematic view similar to FIG. 5 showing the configuration of Modification 2 of the indoor unit.

FIG. 12 is a front view showing the configuration of the indoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention.

FIG. 13 is a side view of the indoor unit.

FIG. 14 is a cross-sectional view of the indoor unit.

FIG. 15 is a schematic view showing an installed state of an air heat exchanger in the indoor unit.

FIG. 16 is a schematic diagram showing an installation state of a blower in the indoor unit and an amount of blown air.

[Fig. 17] Fig. 17 is a schematic diagram showing an air blowing state as seen from a plane direction in a first installation mode when the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention is configured as a floor-standing type.

FIG. 18 is a schematic view showing an air blowing state as seen from a side surface direction in the first installation form.

[Fig. 19] Fig. 19 is a schematic diagram showing an air blowing state as seen from a plane direction in a second installation form when the indoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention is configured as a floor-standing type.

FIG. 20 is a cross-sectional view similar to FIG. 15 showing the configuration of Modification 1 of the indoor unit.

FIG. 21 is a cross-sectional view similar to FIG. 15 showing the configuration of Modification 2 of the indoor unit.

FIG. 22 is a front view showing the configuration of the indoor unit of the air-conditioning apparatus according to Embodiment 3 of the present invention.

FIG. 23 is a cross-sectional view of the indoor unit.

FIG. 24 is a schematic view showing an installation state of an air heat exchanger and a blower in the indoor unit.

FIG. 25 is a schematic view showing an installed state of a heater in the indoor unit.

[Explanation of symbols]

1 is a main casing, 2 is an air inlet, 3 is an air outlet, 3a and 3b are first and second air outlets, 4 is a ventilation passage, 4a and 4b are first and second ventilation passages, and 5A. , 5B, 5
C and 5D are the first, second, third and fourth air heat exchangers, 6
A, 6B, 6C and 6D are first, second, third and fourth blowers, 6a and 6b are first and second blowers, 7 is a pressure reducing valve,
Reference numerals 9 and 10 denote refrigerant pipes, and Ha and Hb denote first and second rod-shaped heaters.

Continuation of front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location F25B 5/04 F24F 1/00 391A (72) Inventor Junji Nakamura 1000-2 Otani, Okamoto-cho, Kusatsu-shi, Shiga Daikin Industries, Ltd. Shiga Works (72) Inventor Keisuke Otsuka 1000 Otani, Okamoto-cho, Kusatsu City, Shiga Prefecture 2 Daikin Industries Co., Ltd. Shiga Works

Claims (6)

[Claims] 1. A vertically long main body casing, an air intake port provided at a front portion of the main body casing, an air blowout port provided at one side of the air intake port of the main body casing, and the main body casing. Inside, the air passage provided from the air suction port to the air outlet, a plurality of heat exchangers provided on the upstream side of the air passage and vertically, and on the downstream side of the air passage. An air conditioner consisting of a plurality of blowers provided above and below. 2. A vertically long main body casing, an air suction port provided at a front portion of the main body casing, an air blowout port provided at one side of the air suction port of the main body casing, and the main body casing. Inside, the air passage provided from the air suction port to the air outlet, a plurality of heat exchangers provided on the upstream side of the air passage and vertically, and on the downstream side of the air passage. An air conditioner comprising a plurality of blowers provided above and below, and a pressure reducing valve provided in a refrigerant pipe between the plurality of heat exchangers. 3. A vertically long main body casing, an air intake port provided in a front portion of the main body casing, air outlets provided on both left and right sides of the air intake port of the main body casing, and the main body casing. Inside, the air passages provided from the air suction port to the left and right air outlets, a plurality of heat exchangers that are provided on the upstream side of the air passages and are arranged on the downstream side of the air passages. Then, an air conditioner comprising a plurality of blowers provided above and below each. 4. A vertically long main body casing, an air intake port provided in a front portion of the main body casing, air outlets provided on both left and right sides of the air intake port of the main body casing, and the main body casing. Inside, the air passages provided from the air suction port to the left and right air outlets, a plurality of heat exchangers provided on the upstream side of the air passages and provided on the upper and lower sides, and the downstream side of the air passages. An air conditioner comprising a plurality of blowers located at the upper and lower sides, respectively, and a pressure reducing valve provided in a refrigerant pipe between the plurality of heat exchangers. 5. The air conditioner according to claim 1, wherein the plurality of blowers are configured so that the number of rotations thereof can be independently variably controlled. 6. The pressure reducing valve is constituted by an electrically operated valve that can be electrically controlled to open and close.
The air conditioner according to 2, 3, 4 or 5.