JPH11325513A - Air-conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of thermal recovery, by a method wherein a compressor, a heat-exchanger on the indoor side, a pressure reducing device, and a heat-exchanger on the indoor side are annually interconnected through a piping, and a heat recovery heat- exchanger paralleling the heat-exchanger on the outdoor side is connected to constitute a refrigerating cycle, and the heat recovery heat-exchanger is arranged in a ventilation passage to discharge indoor air to the outdoor. SOLUTION: After, during cooling operation, a refrigerant discharged from a compressor passes a four-way valve 12, the refrigerant is divided into two ways, Most of the refrigerant flows to a heat-exchanger 13 on the outdoor side and a part of the refrigerant flows to a heat recovery heat-exchanger 31 of a ventilation unit 30. After a refrigerant condensed by a heat-exchanger 13 on the outdoor side is reduced in a pressure in a pressure by a capillary tube 14, the refrigerant is vaporized by a heat-exchanger 21 on the indoor side and indoor air is cooled. Meanwhile, a refrigerant supplied to the heat recovery heat-exchanger 31 is heat-exchanged with indoor air decreased in temperature lower than the temperature of outside air. Thereafter, the refrigerant is returned to an outdoor machine 10a and after a pressure is reduced by a capillary tube 32, and supplied to the heat-exchanger 21 on the indoor side. This constitution maintains the interior of a house at a comfortable temperature as the efficiency of heat recovery is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for performing air conditioning in a house, and more particularly to an air conditioner capable of recovering heat from air exhausted from a house to a house.

[0002]

2. Description of the Related Art In recent years, with the improvement of construction technology, very airtight and highly heat-insulated houses have been built. Accordingly, there has been proposed an air conditioner in which indoor units are arranged behind the ceiling of a house and the entire house is air-conditioned by one indoor unit. As such an air conditioner, for example, JP-A-9-6092
There is No. 6.

[0003] In this air conditioner, indoor units are arranged below the ceiling of a house and below stairs, respectively, and connected to outdoor units arranged outside the house by refrigerant piping. Each room is provided with an outlet connected to the indoor unit via a duct, and a corridor or the like is provided with a suction port connected to the indoor unit. In addition, each room is provided with a vent so that room air flows in a corridor or the like. The air conditioned by the indoor unit is supplied to each room from the outlet of each room, and the room air circulates from the vent to the corridor or the like, and returns to the indoor unit again through the inlet.

[0004]

In such an air conditioner, air in places such as toilets where air is easily contaminated and hard to circulate indoors is exhausted outside the house. A ventilation unit is provided in the exhaust path, and a heat recovery heat exchanger is disposed inside the ventilation unit. Therefore, by performing heat recovery using a heat recovery heat exchanger before exhausting indoor air, heat loss in a house is reduced as much as possible.

The heat recovery heat exchanger is disposed between the outdoor heat exchanger and the indoor heat exchanger, and the outdoor heat exchanger and the heat recovery heat exchanger are connected in series. Therefore, the pressure loss of the refrigerant was large, and the heat recovery efficiency did not improve much.

Accordingly, an object of the present invention is to propose an air conditioner that improves heat recovery efficiency.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises connecting a compressor, an outdoor heat exchanger, a decompression device, and an indoor heat exchanger in a ring by a refrigerant pipe. A refrigeration cycle is configured by connecting a heat recovery heat exchanger in parallel with the outdoor heat exchanger, and the heat recovery heat exchanger is provided in a ventilation path for discharging indoor air to the outside.

According to a second aspect of the present invention, a compressor, an outdoor heat exchanger, a pressure reducing means, and an indoor heat exchanger are sequentially connected by a refrigerant pipe to constitute a refrigeration cycle. In an air conditioner including an outdoor unit that houses a chamber and an indoor unit that heats indoor air that circulates through a plurality of conditioned rooms indoors that house the indoor heat exchanger and that are spatially communicated, A ventilation unit is placed in a ventilation path that connects indoors and outdoors, and inside the ventilation unit, a blower that draws indoor air from indoors and blows it outdoors, and one of which is a refrigerant between the compressor and the outdoor heat exchanger It houses a heat recovery heat exchanger connected to a pipe and the other connected to a refrigerant pipe between the outdoor heat exchanger and the indoor heat exchanger.

According to a third aspect of the present invention, in the ventilation unit, an exhaust passage disposed on the leeward side of the blower and connected to the outdoors, a circulation passage arranged on the leeward side of the blower and connected indoors, A damper that selects and closes one of the paths is provided, and during exhaust operation, room air that has passed through the heat recovery heat exchanger is exhausted outside through the exhaust path, and during circulation operation, it passes through the heat recovery heat exchanger. The indoor air is returned indoors via a circulation path.

According to a fourth aspect of the present invention, a thick refrigerant pipe connected to the indoor unit can be connected to the outdoor unit.
A large pipe side valve, a first small pipe side valve to which a small pipe refrigerant pipe connected to the indoor unit can be connected, a second large pipe side valve to which a large pipe refrigerant pipe to be connected to the ventilation unit can be connected, and a ventilation unit A second thin-tube-side valve to which the refrigerant pipe of the connected thin-tube can be connected is arranged together, and the first thin-tube-side valve and the second thin-tube-side valve are located between the first large-tube-side valve and the second large-tube-side valve. Is arranged.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of a system in which the air conditioner of the present invention is installed in a house to air-condition each room in the house.

Reference numeral 1 denotes a highly airtight and highly insulated house having high heat insulation and airtightness between a house such as a living room and the outside of the house, and it is difficult for heat in the living room to escape to the outside. The house 1 is provided with a plurality of rooms, bathrooms, toilets, and the like on the first and second floors, respectively, and each room or corridor is provided with a vent 2 so that room air can circulate in the house 1. The room air in each room on the first floor is mainly circulated between the room on the first floor and the corridor, and the room air in each room on the second floor can be circulated between the room on the second floor and the corridor. I have.

In the space under the stairs on the first floor of the house 1, the indoor unit 2
0a is arranged, and an indoor unit 20b is arranged behind the ceiling on the second floor. Two outdoor units 10a and 10b are arranged outside the house, and the outdoor unit 10a and the indoor unit 20a are connected by a refrigerant pipe, and the outdoor unit 10b and the indoor unit 20b are connected by a refrigerant pipe. A ventilation unit 30 is arranged behind the ceiling of the bathroom on the first floor, and is connected to the outdoor unit 10a by a refrigerant pipe.

The indoor unit 20a has an air outlet on the lower surface side, and the air outlet is connected to a branch chamber 3a disposed under the floor. On the floor of each residence on the first floor, there is a blowing chamber 4
a is attached from below the floor, the blow-out chamber 4a and the branch chamber 3a are connected by a duct 5a, and the air adjusted in the indoor unit 20a is blown to the blow-out chamber 4a through the duct 5a. It is supplied to each room. A ventilation hole 6 communicating with the corridor is formed in the wall forming the space under the stairs, so that the room air in each living room flows down the stairs through the corridor. The air is sucked from the suction port of the indoor unit 20a.

A branch chamber 3b is connected to an outlet of the indoor unit 20b through a duct 5b.
The outlet chamber 4b attached to the ceiling of each room is connected to b by a duct 5c. The indoor unit 20b
Is connected via a duct 5d to a suction chamber 7 attached to the ceiling of the corridor on the second floor. The air blown from the indoor unit 20b is supplied to each living room from the blowing chamber 4b, and the indoor air in each living room flows into the corridor and is sucked into the indoor unit 20b via the suction chamber 7.

The ventilation unit 30 has a suction side connected to a suction port 8 of a toilet or a bathroom on the first floor or the second floor by a duct 5e, and a discharge side connected to an exhaust port 9 of an outer wall of the house 1 through a duct 5f. A heat recovery heat exchanger 31 and a blower are housed in the ventilation unit 30, and the air sucked from the toilet or the bathroom exchanges heat with the refrigerant in the heat recovery heat exchanger 31, and then the house through the exhaust port 9. 1 Exhausted outside.

FIG. 2 is a refrigeration cycle diagram of the outdoor unit 10a, the indoor unit 20a, and the ventilation unit 30. Reference numeral 11 denotes a compressor for compressing the refrigerant. An accumulator 15 is connected to the suction side, and a four-way valve 12 is connected to the discharge side. An outdoor heat exchanger 13 exchanges heat between the refrigerant passing through the inside and the outside air. Reference numeral 14 denotes a capillary tube that decompresses the refrigerant, and allows the refrigerant to pass during a cooling operation or a heating operation. Note that an electric expansion valve or the like may be used instead of the capillary tube 14. Reference numeral 16 denotes an electromagnetic valve connected in parallel with the capillary tube 14, and allows the refrigerant to pass during the dehumidifying operation.

Reference numeral 21 denotes an indoor heat exchanger for causing heat exchange between the conditioned air in the house 1 and the refrigerant, and the air cooled or heated by the indoor heat exchanger 21 to each room or the like. It is to return to. This indoor side heat exchanger 21 is divided into two,
One is arranged on the windward side when the room air passes, and the other is arranged on the leeward side so as to be leeward. A solenoid valve 22, a capillary tube 23, and a check valve 24 are provided between the leeward indoor heat exchanger 21a and the leeward indoor heat exchanger 21b.
Are connected in parallel. During the cooling operation, the refrigerant passes through the solenoid valve 22, during the dehumidifying operation, the refrigerant passes through the capillary tube 23, and during the heating operation, the refrigerant passes through the check valve 24.

Reference numeral 17a denotes a thick pipe side service valve connected to the four-way valve 12 by a refrigerant pipe, which is connected to the thick pipe side valve 25a of the indoor unit 20a via a refrigerant pipe 40a.
Reference numeral 17b denotes a thin tube side service valve, which is connected to the thin tube side valve 25b of the indoor unit 10a via the refrigerant pipe 40b. A refrigerant pipe 40 connects the outdoor unit 10a and the indoor unit 20a.
a, 40b, the compressor 11,
The outdoor heat exchanger 13, the capillary tube 14, and the indoor heat exchanger 21 are connected in a ring to form a refrigeration cycle.

Reference numeral 18a denotes a thick pipe side service valve, which is connected to a refrigerant pipe 19a which is separated from a refrigerant pipe between the four-way valve 12 and the outdoor heat exchanger 13. Reference numeral 18b denotes a capillary-side service valve, and the capillary-side service valve 1
Refrigerant pipe 19b connected to the capillary tube 1b
4 and a refrigerant pipe between the solenoid valve 16 and the capillary-side service valve 17b. And the thick pipe side service valve 18a is the 30 thick pipe side valve 34a of the ventilation unit.
Via a refrigerant pipe 41a, and the capillary side service valve 18b is connected to the capillary side valve 34b of the ventilation unit 30.
Through a refrigerant pipe 41b.

A heat recovery heat exchanger 31 has one end connected to the thick tube side valve 34a and the other end connected to the thin tube side valve 34b.
It is connected to the. That is, the heat recovery heat exchanger 31 is connected in parallel with the outdoor heat exchanger 13 in the refrigeration circuit. 3
2 is a capillary tube, 33 is a capillary tube 3
The solenoid valve is connected in parallel with 2 and is provided on a refrigerant pipe 19b connected to the capillary-side service valve 17b.

In this figure, during the cooling operation, the refrigerant flows as shown by the solid line. That is, the four-way valve 12 connects the discharge side of the compressor 11 and the outdoor heat exchanger 13 side, connects the suction side of the compressor 11 and the indoor heat exchanger 21 side, closes the electromagnetic valves 16 and 33, Open valve 22.

The refrigerant discharged from the compressor 11 is a four-way valve 1
After passing through the heat exchanger 2, most of the refrigerant flows into the outdoor heat exchanger 13, and some of the refrigerant flows into the heat recovery heat exchanger 3.
Flow to 1. At this time, the outdoor heat exchanger 13 acts as a condenser, and the refrigerant that has exchanged heat with the outside air in the outdoor heat exchanger 13 is decompressed by the capillary tube 14 and the refrigerant piping 40
b to the indoor heat exchanger 21. Further, the refrigerant supplied to the ventilation unit 30 via the thick pipe side service valve 18a exchanges heat with the indoor air 31 in the heat recovery heat exchanger, and thereafter returns to the outdoor unit 10a and passes through the capillary tube 32. The refrigerant decompressed in the capillary tube 32 merges with the refrigerant that has passed through the outdoor heat exchanger 13,
The heat is supplied to the indoor heat exchanger 22.

Since the ventilation unit 30 sucks the air in the house 1, the temperature of the air passing through the heat recovery heat exchanger 31 during the cooling operation is lower than the temperature of the outside air. Further, since the heat recovery heat exchanger 31 is connected in parallel with the outdoor heat exchanger 13, the temperature of the refrigerant flowing in the heat recovery heat exchanger 31 is equal to the temperature of the refrigerant flowing in the outdoor heat exchanger 13. It will be just as hot. Therefore, in the heat recovery heat exchanger 31, heat exchange between the high-temperature refrigerant and low-temperature indoor air promotes condensation of the refrigerant in the heat recovery heat exchanger 31, and heat (cold heat) is efficiently recovered. COP is improved.

The refrigerant having passed through the indoor heat exchanger 21b passes through the solenoid valve 22 and flows to the indoor heat exchanger 21a. At this time, since the indoor heat exchanger 21 acts as an evaporator,
The indoor air sucked into the indoor unit 20a exchanges heat with the refrigerant to be cooled, and supplies this indoor air to each living room. The refrigerant that has passed through the indoor heat exchanger 21 returns to the outdoor unit 10a through the refrigerant pipe 40a, passes through the four-way valve 12, the accumulator 15, and returns to the compressor 11 again.

During the heating operation, the refrigerant flows as shown by the dotted line. That is, the four-way valve 12 connects the discharge side of the compressor 11 and the indoor heat exchanger 21 side, the suction side of the compressor 11 communicates with the outdoor heat exchanger 13, and the solenoid valves 16, 22, 33
Close.

The refrigerant discharged from the compressor 11 is supplied to the four-way valve 12, the thick pipe side service valve 17a, and the thick pipe valve 25a.
And flows into the indoor side heat exchanger 21. At this time, since the electromagnetic valve 22 is closed, the refrigerant flows through the check valve 24, and all of the indoor heat exchanger 21 acts as a condenser. Therefore, the indoor air blown to the indoor heat exchanger 21 is supplied to each living room and the like after being warmed by the refrigerant.

The refrigerant that has passed through the indoor heat exchanger 21 is divided into two directions after passing through the capillary-side service valve 17b, most of which passes through the capillary tube 14 and flows into the outdoor heat exchanger 13, and a portion thereof. Capillary tube 3
After passing through No. 2, it flows to the heat recovery heat exchanger 31 through the capillary side service valve 18b. At this time, the outdoor heat exchanger 13 acts as an evaporator, and the refrigerant decompressed in the capillary tube 14 exchanges heat with the outside air to become a gas refrigerant.

The heat recovery heat exchanger 31 acts as an evaporator and exchanges heat between the indoor air passing through the heat recovery heat exchanger 31 and the refrigerant. During the heating operation, the temperature of the indoor air passing through the heat recovery heat exchanger 31 is higher than the temperature of the outside air.
This further promotes the evaporation of the refrigerant, and efficiently recovers exhaust heat. In addition, the outdoor heat exchanger 13 and the heat recovery heat exchanger 3
1 are connected in parallel, the heat recovery heat exchanger 31
, The pressure loss of the refrigerant in the heat exchanger is reduced, and the heat recovery efficiency is improved as compared with the case where the outdoor heat exchanger 13 and the heat recovery heat exchanger 31 are connected in series.

The refrigerant having passed through the heat recovery heat exchanger 31 flows to the outdoor unit 10a through the thick pipe side service valve 34a,
The refrigerant that has passed through the outdoor heat exchanger 13 joins the compressor 1
1 to the suction side.

During the dehumidifying operation, the refrigerant flows as indicated by a dashed line. That is, the four-way valve 11 connects the discharge side of the compressor 11 and the outdoor heat exchanger 13 side, and connects the suction side of the compressor 11 and the indoor heat exchanger 21 side.
Is opened, and the solenoid valve 22 is closed. At this time, the outdoor heat exchanger 13 and the heat recovery heat exchanger 31 function as a condenser, and the indoor heat exchanger 21 functions as an evaporator.

The refrigerant discharged from the compressor 11 is a four-way valve 1
After passing through 2, the refrigerant is split in two directions, and most of the refrigerant passes through the outdoor heat exchanger 13 and passes through the solenoid valve 16. Further, a part of the refrigerant flows into the heat recovery heat exchanger 31 of the ventilation unit 30, exchanges heat with room air, and then passes through the electromagnetic valve 33.

The outdoor heat exchanger 13 or the heat recovery heat exchanger 3
The refrigerant having passed through 1 is supplied to the indoor unit 20a via the thin tube side service valve 17b, and the refrigerant passes through the indoor heat exchanger 21b, the capillary tube 23, and the indoor heat exchanger 21a in this order. At this time, the indoor heat exchanger 2 that is on the leeward side
1b acts as a condenser, and serves as an indoor heat exchanger 2 on the windward side.
Since 1a functions as an evaporator, the indoor air is dehumidified while being cooled when passing through the indoor heat exchanger 21a, and is warmed and blown to each living room when passing through the indoor heat exchanger 21b. Therefore, the temperature of the indoor air passing through the indoor heat exchanger 21 is not excessively lowered while dehumidifying.

The refrigerant that has passed through the indoor heat exchanger 21 returns to the outdoor unit 10a via the thick pipe service valve 25a.
After passing through the four-way valve 12 and the accumulator 15, the compressor 11
Sucked into.

The refrigeration circuit composed of the outdoor unit 10b and the indoor unit 20b includes a heat recovery heat exchanger 31, a capillary tube 33, and a solenoid valve 32 from the refrigeration cycle shown in FIG.
The other configuration is the same as that of the refrigeration circuit shown in FIG.

FIG. 3 is an enlarged view of the service valves 18 and 40 provided on the side surface of the outdoor unit 10a, and FIG. 3A shows a state where the refrigerant pipes 40 and 41 are connected.
(B) shows a state before the refrigerant pipes 40 and 41 are connected. The service valves 18 and 40 are arranged from the bottom in the order of the thick pipe side service valve 17a, the thin pipe side service valve 17b, the thin pipe side service valve 18b, and the thick pipe side service valve 18a, and the lower service valve 17a, 17b is connected to the indoor unit 20a. And the upper service valve 18a,
18b is connected to the ventilation unit 30. The two narrow pipe service valves 17b and 18b are covered by a cover 42, and before the refrigerant pipes 40 and 41 are connected, the large-diameter nut 4 is connected to the large pipe side service valves 17a and 18a.
3a is attached, and the capillary side service valves 17b, 18
A small diameter nut 43b is attached to b. In the present invention, the thick pipe side service valves 17a and 18a are arranged outside,
Since the thin tube service valves 17b and 18b are arranged inside, a wrench can be inserted to remove the nut 43 even if the interval between the service valves 17 and 18 is small.

FIG. 4 is a perspective view showing the installation state of the indoor unit 20b. The indoor unit 20b can be separated into an upper unit 50 and a lower unit 51. The upper unit 50 accommodates the indoor heat exchanger 21, the solenoid valve 22, the capillary tube 23, and the like. The lower unit 51 has a blower (not shown). ) Is stored.

A suction port 52 is formed on the front surface of the upper unit 50, and a duct 5d communicating with the suction chamber 7 provided on the ceiling is attached to the suction port 52. An electrical component box 53 is disposed on the side of the suction port 52, and accommodates electrical components such as a control unit for controlling the blower, the electromagnetic valve 22, and the like.

An outlet 54 is formed in the front of the lower unit 51, and a duct 5b connected to the branch chamber 3b disposed behind the ceiling is attached to the outlet 54. The lower unit 51 has a front surface and a bottom surface of the same size, and a panel 55 provided with an air outlet 54 can be attached to both the front surface and the bottom surface. Therefore, when setting the indoor unit 20 behind the ceiling, the panel 55 having the air outlet 54 is attached to the front, and the indoor unit 20
When arranging below the stairs on the floor, a panel 55 having an outlet 54 is attached to the bottom surface, so that the indoor unit 2 having the same configuration is provided.
At 0, the direction of the outlet 54 can be changed.

The lower surface of the upper unit 50 and the lower unit 5
The upper surface of the first unit 1 is formed in the same size, and the upper unit 50 is integrated with the lower unit 51 by a fixing tool 56 in a state of being overlapped. The upper unit 50 and the lower unit 5
The surfaces facing each other are formed so that air can flow therethrough, and the air sucked from the inlet 52 of the upper unit 50 can be blown out from the outlet 54 of the lower unit 51. Since the upper unit 50 and the lower unit 51 are configured separately, by changing the direction of the lower unit 51, the inlet 52 and the outlet 54 of the indoor unit 20b can be arranged in the same direction, or in the opposite directions. It becomes possible to arrange so that it becomes.

Reference numeral 57 denotes a mounting table on which the indoor unit 20b is arranged. The mounting table 57 has an upright portion 57a projecting upward along the periphery. A stopper 58 is provided behind the mounting table 57, and the rear side of the indoor unit 20 b placed on the mounting table 57 comes into contact with the stopper 58. Mounting table 5
7 is screwed in front of the indoor unit 20b.
0b is fixed to the mounting table 57.

Fixing holes 57b are provided at four corners of the mounting table 57, and nails and screws are inserted into the fixing holes 57b to fix the mounting table 57 to the flat plate 60 fixed to a beam or the like.

As described above, since the indoor unit 20b can be fixed only by screwing it with the mounting fixture 59 after it is placed on the mounting table, the installation operation of the indoor unit 20b can be performed from the front side, and the work such as the space above the ceiling can be performed. Can be easily installed even in difficult places. In addition, since the mounting table 57 is provided with the upright portion 57a, even when drain water or the like drops from the indoor unit 20b, the drain water can be stored on the mounting table 57.
Drain water and the like can be prevented from falling on the ceiling.

FIG. 5 is a perspective view showing the installation state of the indoor unit 20a. The basic configuration of the indoor unit 20a is shown in FIG.
Is the same as the indoor unit 20b shown in FIG. The upper unit 62 of the indoor unit 20a has a filter 63 attached to the suction port, and the lower unit 64 has an outlet on the lower surface side.

Reference numeral 65 denotes a mounting table on which the indoor unit 20a is disposed, which has the same shape as that of the mounting table 56 having an opening 66 at the center. Therefore, the mounting table 65 is formed with an upright portion 65a protruding upward along the periphery thereof.
At four corners of the mounting table 65, fixing holes 65b for fixing the mounting table 65 to the floor 68 are formed.

Reference numeral 67 denotes a connecting portion inserted into the opening 66 of the mounting table 65. The connecting portion 67 is formed flat so that the upper surface can contact the bottom surface of the indoor unit 20a, and the lower portion is below the opening 69 provided on the floor 68. Vent 70 of the branch chamber 3a arranged in the
It has a cylindrical protrusion so as to fit inside the.
The upper surface is in contact with the bottom surface of the indoor unit 20a, and the lower side is fitted into the branch chamber 3a, so that the indoor unit 20a and the branch chamber 3a are connected so that air can be ventilated.

Reference numeral 71 denotes an auxiliary plate having a thickness corresponding to a gap formed when the indoor unit 20a is placed on the mounting table 65 via the connecting portion 66. The auxiliary plate 71 is connected to the indoor unit 20a and the mounting table. 65, the indoor unit 20a can be stably mounted.

When arranging the indoor unit 20a, first, the mounting table 65 is fixed to the floor 68. At this time, the connecting portion 66 attached to the mounting table 65 is fitted into the vent 70 of the branch chamber 3a. The mounting table 6 is located on the back side of the indoor unit 20a.
5 is placed on the mounting table 65 so as to contact the stopper 72 attached to the mounting table 5. At this time, the outlet on the bottom surface of the indoor unit 20a is located at the opening 66 of the mounting table 65. And mounting table 6
The indoor unit 20a is fixed by screwing the attachment 73 attached to the fifth unit and the indoor unit 20a.

Since the mounting table 65 is provided with the standing portion 65a having a protruding peripheral edge, even if the drain water drops from the indoor unit 20a onto the mounting table 65, the drain water is supplied to the mounting table 65.
You can catch it. The opening 6 of the mounting table 65
Since 6 is covered by the connecting portion 67, the drain water or the like is held on the mounting table 65, and then evaporates.

Next, another embodiment of the present invention will be described.
FIG. 6 is a conceptual diagram of a system in which an air conditioner is installed in the house 1 and air-conditions each room in the house 1, and FIG. 7 is a schematic diagram of a ventilation unit 80. This embodiment is shown in FIG.
Only the configuration of the air conditioner and the ventilation unit 80 shown in Fig. 2 are different, and the same configuration is denoted by the same reference numeral and detailed description is omitted.

The ventilation unit 80 is capable of performing an exhaust operation of sucking indoor air to recover heat after exhausting the air and then exhausting the house 1 outside, and a circulation operation of sucking indoor air to recover heat and returning the indoor air again. is there.

The heat recovery heat exchanger 3 is installed in the ventilation unit 80.
The heat recovery heat exchanger 31 is connected in parallel with the outdoor heat exchanger 13 as shown in FIG. 82 is an intake duct leading to the corridor on the first floor,
83 is a circulation duct leading to the second floor corridor, 84 is house 1
It is an exhaust duct that leads to the outside. 85 is a circulation duct 8
3 and a damper for switching the air flow path between the exhaust duct 84 and only one of the circulation duct 83 and the exhaust duct 84 can be made effective.

When the exhaust operation is set by the remote controller mounted on the wall, the circulation duct 83 is operated by the damper 85.
Is closed, and the exhaust duct 84 becomes effective. Then, the room air on the first floor is sucked into the ventilation unit 80 by the intake duct 82, passed through the heat recovery heat exchanger 31, and then exhausted to the outside from the exhaust duct 84.

When the circulation operation is set by the remote controller, the exhaust duct 84 is closed by the damper 85, and the circulation duct 83 becomes effective. Then, the indoor air on the first floor is sucked into the ventilation unit 80 via the intake duct 82, passed through the heat recovery heat exchanger 31, and then blown from the circulation duct 83 to the corridor on the second floor.

In the cooling operation and the dehumidifying operation, the temperature of the heat recovery heat exchanger 31 becomes higher than that of the indoor air, so that the air passing through the heat recovery heat exchanger 31 is dehumidified, and the indoor air is maintained at a more comfortable humidity. be able to.

In this embodiment, the circulation operation and the exhaust operation are set by the remote controller. However, the circulation operation and the exhaust operation are automatically switched based on factors such as the set temperature, room temperature, and humidity. Is also good.

[0057]

As described above, according to the present invention,
The outdoor heat exchanger and the heat recovery heat exchanger are connected in parallel in the refrigeration circuit, and this heat recovery heat exchanger is arranged in a ventilation path that discharges indoor air to the outside, so that it flows through the heat recovery heat exchanger. The refrigerant is not affected by heat exchange or pressure loss by the outdoor heat exchanger. Therefore, heat recovery efficiency is improved, and CO
P improves.

Further, according to the present invention, the ventilation unit can select between an exhaust operation for exhausting indoor air from which heat has been recovered to the outside and a circulation operation for returning indoor air from which heat has been recovered to the indoor. It is possible to maintain indoor air at a comfortable humidity while improving efficiency.

Further, according to the present invention, the service valves to which the refrigerant pipes connected to the indoor unit and the ventilation unit are connected are collectively arranged in the outdoor unit, and the narrow tube side service valve is arranged between the two large tube side service valves. Therefore, even when the intervals at which the service valves are arranged are narrow, the connection work between the service valves and the refrigerant pipes can be easily performed.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a system that installs an air conditioner according to an embodiment of the present invention in a house and air-conditions each room in the house.

FIG. 2 is a refrigeration circuit diagram of the air conditioner according to the embodiment of the present invention.

FIG. 3 is an enlarged view of a service valve arranged in the outdoor unit according to the embodiment of the present invention.

FIG. 4 is a perspective view of the indoor unit according to the embodiment of the present invention.

FIG. 5 is a perspective view of the indoor unit according to the embodiment of the present invention.

FIG. 6 is a conceptual diagram of a system in which an air conditioner according to another embodiment of the present invention is installed in a house and air-conditions each room in the house.

FIG. 7 is a schematic view of a ventilation unit according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 3 branch chamber 4 outlet chamber 5 duct 7 suction chamber 10 outdoor unit 13 outdoor heat exchanger 20 indoor unit 21 indoor heat exchanger 30 ventilation unit 31 heat recovery heat exchanger 57 mounting table 57a standing portion

Claims (4)

[Claims] 1. A refrigeration system in which a compressor, an outdoor heat exchanger, a decompression device, and an indoor heat exchanger are annularly connected by a refrigerant pipe, and a heat recovery heat exchanger is connected in parallel with the outdoor heat exchanger. An air conditioner comprising a cycle, wherein the heat recovery heat exchanger is provided in a ventilation path for discharging indoor air to the outside. 2. An outdoor unit having a compressor, an outdoor heat exchanger, an outdoor heat exchanger, a pressure reducing means, and an indoor heat exchanger connected in order by a refrigerant pipe to form a refrigeration cycle. An air conditioner comprising an indoor unit for storing indoor heat exchangers and for controlling indoor air circulating through a plurality of indoor conditioned rooms spatially communicated with each other, and connecting the indoor and the outdoor. Arranging a ventilation unit in a ventilation path, inside the ventilation unit, a blower that sucks indoor air from indoors and blows air to the outside, one of which is connected to a refrigerant pipe between a compressor and an outdoor heat exchanger, An air conditioner characterized in that the other houses a heat recovery heat exchanger connected to a refrigerant pipe between the outdoor heat exchanger and the indoor heat exchanger. 3. An exhaust passage disposed on the leeward side of the blower and connected to the outside, a circulation passage disposed on the leeward side of the blower and connected indoors, the exhaust passage and the circulation passage, respectively. A damper that selectively closes one of the two is provided, and during exhaust operation, room air that has passed through the heat recovery heat exchanger is exhausted to the outside through an exhaust path, and during circulation operation, indoor air that has passed through the heat recovery heat exchanger is provided. 3. The air conditioner according to claim 2, wherein the air is returned indoors via a circulation path. 4. A first thick pipe side service valve to which the outdoor unit can be connected to a thick refrigerant pipe connected to the indoor unit, and a first thin pipe to which a thin pipe refrigerant pipe connected to the indoor unit can be connected. Side service valve, a second thick pipe side service valve to which a thick refrigerant pipe connected to the ventilation unit can be connected, and a second thin pipe side service valve to which a thin pipe refrigerant pipe connected to the ventilation unit can be connected. Wherein the first thin tube side service valve and the second thin tube side service valve are arranged between the first thick tube side service valve and the second thick tube side service valve. The air conditioner according to claim 2, characterized in that: