JPH07243660A - Air conditioner - Google Patents

Abstract

PURPOSE:To operate to dehumidify by effective use of exhaust heat of a condenser with a low cost by disposing a reheat passage at an air passage at the rear of a first heat exchanger at an exhaust heat passage from a second heat exchanger. CONSTITUTION:A first heat exchanger 3 which becomes a utilization side evaporator and a second heat exchanger 4 which becomes a heat source side condenser are integrally contained in a casing 2 in a vertical direction. A duct 5 for feeding the indoor air is disposed in the casing 2, the interior of the duct 5 is formed as an air passage 8, and a reheat passage 9 is formed in a bypass state at a part of the duct 5 near the exchanger 4. Three dampers 10-12 are openably provided in the duct 5. The dampers 10-12 are suitably switched to alter a flow of the air in the passage 8 of the duct 5, thereby switching it to a cooling operation, a dehumidifying operation or a heating operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner capable of dehumidifying operation.

[0002]

2. Description of the Related Art As an air conditioner of this type capable of performing a cooling operation and a dehumidifying operation, for example, JP-A-4-295 is known.
No. 568 and Japanese Utility Model Laid-Open No. 60-135534. These air conditioners are configured to cool indoor air to dehumidify it and then reheat it to return it to the room.

[0003]

By the way, the above-mentioned Japanese Patent Application Laid-Open No. 4-2 / 1992 discloses a system in which the cool air passing through the evaporator is reheated by the condenser.
In the 95568 publication, two heat exchangers are installed on the indoor side. Therefore, the structure is large and complicated, and further, an additional refrigerant circuit for switching to the cooling operation is required, which causes a problem of high cost. Further, in Japanese Utility Model Laid-Open No. 60-135534, since reheat is performed by heat exchange with the outside air, there is a problem that the amount of reheat is insufficient when the outside air temperature is low.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object thereof is to provide an air conditioner in which dehumidifying operation can be carried out inexpensively by effectively utilizing exhaust heat of a condenser. To do.

[0005]

Therefore, an air conditioner according to a first aspect of the invention has a first heat exchanger 3 as an evaporator, a second heat exchanger 4 as a condenser, and both heat exchangers 3, 4, a refrigerant circuit for circulating a refrigerant, and an air passage 8 for cooling the sucked indoor air by the first heat exchanger 3 and blowing the indoor air.
The reheat passage 9 provided in the air passage 8 at the rear position of the first heat exchanger 3 is arranged in the exhaust heat passage from the second heat exchanger 4.

Further, in the air conditioner according to a second aspect of the present invention, the reheat passage 9 is configured as a bypass passage of the air passage 8, and a damper 12 for switching and opening the passages 8 and 9 is provided. It is characterized in that the cooling operation and the dehumidification operation are switched by switching the switch 12.

Further, the air conditioner of the third aspect is characterized in that the damper 12 can adjust the opening ratio of the air passage 8 and the reheat passage 9.

In the air conditioner of claim 4, the reheat passage 9 is provided.
It is characterized in that a fin 19 for heat exchange is provided upright.

An air conditioner according to a fifth aspect of the present invention is characterized in that the first heat exchanger 3 and the second heat exchanger 4 are housed in one casing 2 and the casing 2 is installed outdoors. There is.

An air conditioner according to a sixth aspect is characterized in that the first heat exchanger 3 and the second heat exchanger 4 are installed vertically.

The air conditioner of claim 7 is characterized in that a reheat passage 9 for ventilation during dehumidification is arranged between the second heat exchanger 4 and the air passage 8 for ventilation during cooling. .

[0012]

In the air conditioner according to the first aspect, when the low temperature / low humidity air heat-exchanged in the first heat exchanger 3 passes through the reheat passage 9, the exhaust heat of the second heat exchanger 4 causes It is reheated and returned to the room.

Further, in the air conditioner of the second aspect, since the cooling operation and the dehumidifying operation are switched by opening / closing the damper 12, both operations can be performed with an inexpensive structure.

Further, in the air conditioner according to the third aspect of the invention, since the opening degree of the damper 12 is controlled, the blowout temperature during the dehumidifying operation can be easily adjusted.

In the air conditioner of the fourth aspect, the fins 19 provided in the reheat passage 9 promote heat exchange between the exhaust heat on the second heat exchanger 4 side and the air in the reheat passage 9, so that the heat is sufficiently exchanged. A reheat amount can be obtained.

In the air conditioner of the fifth aspect, since the first heat exchanger 3 and the second heat exchanger 4 are housed in one casing 2 and installed outdoors, the heat exchanger is indoors. There is no need to install, and the room has only the intake and outlet of the air passage, and the indoor side of the air conditioner can be configured compactly,
Moreover, the construction is simplified.

In the air conditioner of the sixth aspect, the first heat exchanger 3 and the second heat exchanger 4 are arranged vertically, so that the installation area required for the casing 2 installed outdoors is reduced. Therefore, the air conditioner can be easily installed even in a place with a small installation area.

In the air conditioner of claim 7, between the air passage 8 through which the low temperature air passes during cooling and the second heat exchanger 4 through which the high temperature is exhausted, the second heat exchanger 4 is exhausted during dehumidification. Since the reheat passage 9 for exchanging heat with the heat is interposed, the reheat passage 9 serves as a heat insulating member, and the low temperature air flowing through the air passage 8 for ventilation during cooling is not heated. .

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the air conditioner of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional view of the case where the air conditioner body 1 is installed along a wall surface, and a first heat exchanger 3 that serves as a use-side evaporator and a second heat exchanger 4 that serves as a heat-source-side condenser are vertically arranged. The housing is integrally mounted in the casing 2 in the direction. The air conditioner body 1 of this embodiment is of a type installed outdoors.

A duct 5 for circulating the indoor air is arranged in the casing 2. One end of the upper side of the duct 5 is opened to the inside of the room to serve as an air outlet during cooling operation and dehumidifying operation, and during heating operation. A ventilation port 6 serving as a suction port is formed. The other end of the lower side of the duct 5 is opened to the inside of the room to form a ventilation port 7 that serves as a suction port during the cooling operation and the dehumidifying operation, and serves as an outlet during the heating operation. An air passage 8 is provided inside the duct 5, and a reheat passage 9 is formed in a bypass shape in a portion of the duct 5 near the second heat exchanger 4. Three dampers 10 to 12 are provided inside the duct 5 so as to be openable and closable. By opening and closing the three dampers 10 to 12 as shown in Table 1 below, the air in the air passage 8 in the duct 5 is The flow is changed to switch between cooling operation, dehumidifying operation, and heating operation.

[0021]

[Table 1]

The above Table 1 shows the damper 1 in each operation mode.
The positions of 0 to 12 are shown. The damper 10 is set to the position B, the damper 11 is set to the position A, and
Further, the damper 12 is controlled so as to be in the A position. During the dehumidifying operation (dry), the damper 10 is in the B position, the damper 11 is in the A position, and the damper 12 is in the B position.
It is controlled to be in the position. Further, during heating operation, the damper 10 is controlled to the A position, the damper 11 is controlled to the B position, and the damper 12 is controlled to the A position.

A machine room 13 is provided in the lower part of the casing 2, and a compressor, a refrigerant circuit for circulating a refrigerant, electric components and the like are installed in the machine room 13. Two fans 14 are provided outside the first heat exchanger 3. 3 is a sectional view taken along line YY shown in FIG. 2 is a sectional view taken along line XX shown in FIG. As shown in FIGS. 1 and 2,
A suction port 15 for sucking outside air is formed in the casing 2 outside the second heat exchanger 4, and the air that has been heat-exchanged in the second heat exchanger 4 is discharged to the outside on the inclined surface of the upper portion of the casing 2. An outlet 16 for blowing out is formed. A fan 17 is provided inside the air outlet 16. Second above
The heat exchanger 4 has a substantially semicircular cross section, and a suction grill 18 is arranged outside the heat exchanger 4. Further, a duct 5a bypassing the duct 5 is arranged in a substantially central portion which serves as an exhaust heat passage of the second heat exchanger 4, and reheat for circulating low-temperature and low-humidity air in the duct 5a during dehumidification operation. The passage 9 is used. Also, although low-temperature or high-temperature air flows into the duct 5 during the cooling operation or the heating operation, the duct 5 located on the side of the second heat exchanger 4 is provided with a heat insulating material 20 as shown in FIG. ing. That is, the air flowing through the air passage 8 is prevented from being affected by the second heat exchanger 4. Further, as shown in FIG. 2, since the duct 5a forming the reheat passage 9 is disposed between the second heat exchanger 4 and the duct 5 forming the air passage 8, the reheat passage 9 is Since it has a heat insulating function, it prevents the cold air or hot air flowing through the air passage 8 from being affected.

A damper 10 for switching the flow of indoor air
12 are provided at three positions as described above, and by the combination of the positions of these dampers 10 to 12 (see Table 1), during cooling operation (the dampers 10 to 12 are B, A and A, respectively).
Position), the room air is sucked into the fan 14 side from the lower ventilation port 7, passes through the first heat exchanger 3 and becomes low temperature / low humidity air as shown by the solid arrow in FIG. Air passage 8
Flow into. Further, the cold air that has undergone heat exchange rises in the air passage 8 as it is, and blows the cool air into the room through the ventilation port 6.

During the heating operation (the dampers 10 to 12 are at the positions A, B, and A, respectively), the fan 1 is blown from the upper ventilation port 6.
Room air is sucked into the 4 side, and as shown by the dashed arrow,
Heat is exchanged to a high temperature by descending in the air passage 8 and passing through the first heat exchanger 3. The heat-exchanged high-temperature air is blown into the room through the lower ventilation port 7. In this way, the air outlet is changed up and down according to the cooling / heating switching, and the indoor temperature distribution is made uniform in each operation mode to improve the indoor comfort.

Next, the case of the dehumidifying operation (dry operation) will be described. For dehumidifying operation, each damper 10-1
The positions of 2 are B, A, and B, respectively. Especially, by setting the damper 12 to the position of B, it is sucked toward the fan 14 side, passes through the first heat exchanger 3, and is kept at low temperature and low humidity. The fresh air flows into the reheat passage 9 of the duct 5a. At this time, since the duct 5a of the reheat passage 9 is piped to the second heat exchanger 4 side, the second heat exchanger 9 operating as a condenser
The high temperature air of the heat exchanger 4 and the low temperature and low humidity air of the reheat passage 9 are heat-exchanged (air-air) and reheated. Then, the reheated air is blown into the room through the upper ventilation port 6. Since the reheat duct 5a is provided with fins 19 for promoting heat exchange as shown in FIG.
A sufficient amount of reheat can be obtained. Further, during the dehumidifying operation, by adjusting the opening degree of the position of the damper 12 between B and A, the air to be reheated in the reheat passage 9 is mixed with the air having the low temperature and low humidity in the air passage 8. The air can be blown out from the ventilation port 6, and the blowout temperature can be adjusted.

As described above, the dehumidifying function can be realized by the simple structure of the bypass air passage 9 and the openable and closable dampers 10 to 12, so that the cost can be reduced. Further, the blowout temperature during the dehumidifying operation can be easily adjusted only by controlling the opening degree of the damper 12.

[0028]

As described above, in the air conditioner according to the first aspect, when the low temperature and low humidity air heat-exchanged in the first heat exchanger passes through the reheat passage, the exhaust air from the second heat exchanger is discharged. It is reheated by exchanging heat with high temperature air by heat. As described above, since the exhaust heat of the second heat exchanger is used for reheating, the dehumidifying operation can be performed at low cost. Further, unlike the conventional case, it is possible to perform the dehumidifying operation with one heat exchanger without requiring two heat exchangers on the indoor side. Furthermore, since it is reheated by the exhaust heat of the second heat exchanger, it is not affected by the outside air temperature as in the conventional case,
There is no shortage of reheat.

Further, in the air conditioner of the second aspect, since the cooling operation and the dehumidifying operation are switched by opening / closing the damper, both operations can be performed with an inexpensive structure.

Further, in the air conditioner of the third aspect, since the opening degree of the damper is controlled, it is possible to easily adjust the blowout temperature during the dehumidifying operation.

In the air conditioner of the fourth aspect, since the fins provided in the reheat passage promote heat exchange between the exhaust heat on the second heat exchanger side and the air in the reheat passage, a sufficient amount of heat is regenerated. The amount of heat can be obtained.

In the air conditioner of the fifth aspect, since the first heat exchanger and the second heat exchanger are installed in one casing and installed outdoors, the heat exchanger is installed indoors. There is no need, and the room has only the suction port and the air outlet of the air passage, so that the indoor side of the air conditioner can be made compact, and its construction is greatly simplified.

In the air conditioner of the sixth aspect, since the first heat exchanger and the second heat exchanger are arranged vertically, it is possible to reduce the installation area required for the casing installed outdoors. The air conditioner can be easily installed even in a place with a small installation area.

In the air conditioner of claim 7, between the air passage through which the low temperature air passes during cooling and the second heat exchanger through which the high temperature is exhausted, the exhaust heat and the heat of the second heat exchanger during dehumidification are provided. Since there is a reheat passage for replacement, this reheat passage serves as a heat insulating member, so that the low-temperature air flowing through the air passage for ventilation during cooling is not warmed up, so that the cooling operation is performed efficiently. It can be performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state where an air conditioner of an embodiment of the present invention is installed.

FIG. 2 is a sectional view taken along line XX in FIG. 1 of the embodiment of the present invention.

FIG. 3 is a sectional view taken along line YY of FIG. 1 of the embodiment of the present invention.

[Explanation of symbols]

 1 Air Conditioner Main Body 2 Casing 3 First Heat Exchanger 4 Second Heat Exchanger 5 Duct 8 Air Passage 9 Reheat Passage 12 Damper 19 Fin

Claims (7)

[Claims] 1. A refrigerant that circulates a refrigerant through a first heat exchanger (3) that functions as an evaporator, a second heat exchanger (4) that functions as a condenser, and both heat exchangers (3) (4). A circuit and an air passage (8) that cools the sucked indoor air in the first heat exchanger (3) and blows it out into the room, and is located behind the first heat exchanger (3). In the air conditioner, the reheat passage (9) provided in the air passage (8) is arranged in the exhaust heat passage from the second heat exchanger (4). 2. The reheat passage (9) is configured as a bypass passage of the air passage (8), and a damper (12) for switching and opening both passages (8) (9) is provided,
The air conditioner according to claim 1, wherein the damper (12) is switched to perform cooling and dehumidifying operation. 3. The air conditioner according to claim 2, wherein the damper (12) is configured so that the opening ratio of the air passage (8) and the reheat passage (9) can be adjusted. 4. The air conditioner according to claim 1, 2, or 3, wherein fins (19) for heat exchange are provided upright in the reheat passage (9). 5. The first heat exchanger (3) and the second heat exchanger (4) are housed in one casing (2), and the casing (2) is installed outdoors. The air conditioner according to claim 1, claim 2, claim 3, or claim 4. 6. The air conditioner according to claim 5, wherein the first heat exchanger (3) and the second heat exchanger (4) are installed vertically. 7. A reheat passage (9) for dehumidification ventilation is arranged between the second heat exchanger (4) and an air passage (8) for ventilation during cooling. The air conditioner according to claim 2, claim 3, claim 4, claim 5, or claim 6.