JPH10176843A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the ventilation of indoor air and the recovery of heat efficiently by a method wherein an air conditioner is equipped integrally with a ventilation unit provided with a ventilating fan, sucking and discharging the indoor air, and a heat recovering device, recovering the heat of air sent from the ventilating fan. SOLUTION: Upon cooling operation, four-way valves 8a, 8b are switched to form the cycle of refrigerant, circulating through compressors 1a, 1b, outdoor heat exchangers 2a, 2b, heat recovering devices 4a, 4b, reducers 5a, 5b and indoor heat exchangers 6a, 6b. In this case, the refrigerant is changed into high-temperature and high-pressure gas refrigerant by the compressors 1a, 1b in outdoor machines 20a, 20b and heat exchange between the gas refrigerant and outdoor air is effected in the outdoor heat exchangers 2a, 2b to produce the refrigerant under the mixed condition of gas and liquid, then, is sent into a ventilation device 30. The refrigerant is cooled through heat exchange between indoor air in the heat recovering devices 4a, 4b to send it into the indoor machines 10a, 10b. The heat recovering devices 4a, 4b are constituted so that indoor air is sent into the same by the ventilating fan 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner provided with a ventilation unit capable of ventilating indoor air and recovering heat from air exhausted for the ventilation.

[0002]

2. Description of the Related Art Conventionally, there has been proposed an air conditioner for cooling and heating the inside of a room using a heat pump. For example, in Japanese Patent Publication No. 63-46335, an indoor unit equipped with an indoor heat exchanger and an indoor fan, a compressor, an outdoor unit-side heat exchanger, BACKGROUND ART An air conditioner having an outdoor unit or the like including a fan, an outside air inlet serving as an intake of outside air, and a damper for adjusting an intake amount of outside air is disclosed.

[0003] By adjusting the degree of opening and closing of the damper, the intake resistance of the outside air sucked into the outdoor unit through the outside air suction port is adjusted, and the amount of outside air sucked into the outdoor unit is adjusted. .

At this time, since the outdoor fan rotates regardless of the degree of opening and closing of the damper, when the amount of outside air taken into the outdoor unit fluctuates, the indoor fan passes through the communication pipe by an amount corresponding to the fluctuation amount. Air is taken into the outdoor unit.

[0005]

However, the heat recovery of the indoor air is performed by rotating the outdoor fan provided in the outdoor unit to make the communication pipe a negative pressure, thereby partially removing the indoor air. In this configuration, the air that is exhausted for ventilation is recovered by the outdoor heat exchanger, and most of the air supplied to the outdoor heat exchanger by the outdoor fan is connected to the outdoor air. Become.

Accordingly, the amount of indoor air exhausted to the outside, particularly the amount of indoor air guided to the outdoor heat exchanger, is small.
It was difficult to increase the amount of heat recovered.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air conditioner capable of arbitrarily adjusting the amount of ventilation and efficiently recovering the heat of exhausted indoor air.

[0008]

In order to solve the above-mentioned problems, in cooling, a refrigerant is compressed by a compressor to become a high-temperature and high-pressure gas refrigerant, and exchanges heat with outside air in an outdoor heat exchanger.
Most of the liquefied gas-liquid refrigerant is sent to the heat recovery unit as a refrigerant. In the heat recovery unit, the refrigerant exchanges heat with cold indoor air that is exhausted outdoors for ventilation, and the remaining gas refrigerant is liquefied. By eliminating the gas refrigerant, the temperature of the liquid refrigerant can be further reduced, and the thermal efficiency of the cycle increases. Then, the refrigerant is sent to the pressure reducer, the flow rate of the refrigerant is reduced by the pressure reducer, the pressure is reduced and evaporated by the indoor heat exchanger, and the refrigerant exchanges heat with the air blown to each room.
As a result, the air blown to each room becomes cool air, and the rooms are cooled. Thereafter, the refrigerant returns to the compressor.

At the time of heating, the refrigerant is compressed by the compressor to become a high-temperature and high-pressure gas refrigerant, sent to the indoor heat exchanger, and exchanges heat with the air blown to each room by the indoor heat exchanger to condense. With this heat of condensation, the air blown into each room becomes warm air, and each room is heated. After that, the refrigerant is throttled by the pressure reducer and sent to the heat recovery device. In the heat recovery unit, the refrigerant exchanges heat with the warm indoor air to exhaust,
A part of the gas-liquid mixture is evaporated, and the remaining refrigerant is sent to the outdoor heat exchanger. Thereafter, the outdoor heat exchanger exchanges heat with the outside air, evaporates, and returns to the compressor.

At this time, the ventilation unit is provided in the ventilation opening, and the heat recovery unit and the ventilation blower are provided in the ventilation unit, and the indoor ventilation is performed by the ventilation blower, and the ventilation and the exhaust are performed. The ventilated air is blown to a heat recovery unit to enable efficient ventilation and heat recovery.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a basic configuration of an air conditioner according to the present invention. The air conditioner includes compressors 1a and 1b for compressing refrigerant, outdoor heat exchangers 2a and 2b for exchanging heat between the outside air and the refrigerant, and an outdoor blower 3a for blowing outside air to the respective outdoor heat exchangers 2a and 2b. , 3b, heat exchangers 4a and 4b for exchanging heat between air and refrigerant discharged for indoor ventilation and reusing heat of the air, electric expansion valves, capillary tubes, and the like. Decompressors 5a, 5
b, indoor heat exchangers 6a and 6b for exchanging heat between air and a refrigerant blown to each room for air conditioning, and the indoor heat exchanger 6
indoor blowers 7a and 7 for blowing air harmoniously to the air blowers a and 6b
b, having four-way switching valves 8a and 8b for switching the direction of circulation of the refrigerant during cooling and heating, and accumulators 9a and 9b, each constituting two independent refrigeration cycles (one for the first floor and one for the second floor). ing.

By switching the four-way switching valves 8a and 8b, during cooling, the refrigerant is compressed by the compressors 1a and 1b, the outdoor heat exchangers 2a and 2b, the heat recovery units 4a and 4b, and the decompressors 5a and 5b.
A cycle is formed by circulating in order of the indoor heat exchangers 6a and 6b, and at the time of heating, the refrigerant is compressed by the compressors 1a and 1b, the indoor heat exchangers 6a and 6b, the decompressors 5a and 5b, and the heat recovery units 4a and 4b.
A cycle for circulating the outdoor heat exchangers 2a and 2b in this order is formed.

The dotted and solid arrows shown along the pipe line in FIG. 1 correspond to the solid and dotted flow paths shown in the four-way switching valves 8a and 8b, respectively. The refrigerant circulates in the direction of the dotted arrow during heating.

When it is necessary to adjust the flow rate of the refrigerant flowing through the indoor heat exchangers 6a, 6b,
It is also possible to add a refrigerant flow control valve to 5b to have a refrigerant distribution function.

The compressors 1a and 1b change the gist of the present invention regardless of whether the operating capacity can be continuously varied, the operating capacity can be changed to a plurality of stages in a stepwise manner, or the operating capacity cannot be changed. Since it is not the one, it can be arbitrarily selected according to the installation of the air conditioner.

Furthermore, a strainer,
It is also possible to provide a muffler and the like, and the arrangement at that time can be a generally known arrangement, and is not shown.

The four-way switching valves 8a and 8b are preferably set to the same operation mode (cooling / heating), but there is no problem even if different operation modes are selected.

FIG. 2 is a conceptual diagram when the air conditioner having the above-described configuration is arranged in a house to form an air conditioning system for cooling and heating. The air for the first floor arranged on the floor side is shown in FIG. It consists of a conditioner and a second-floor air conditioner arranged on the ceiling side, and these configurations are the same except for the configuration of a suction chamber described later.

Each air conditioner has indoor units 10a, 10b,
Outdoor units 20a, 20b, ventilation unit 30, suction chambers 40a, 40b, branch chambers 50a, 50
b, blowing chambers 60a, 60b, and the like.

The indoor unit 10a on the floor side is disposed in a closed space such as below the stairs.
Acting as 0a.

As a result, it is not necessary to separately provide the suction chamber 40a, so that the manufacturing cost can be reduced.

In the present embodiment, the outside air and the room air flow into the suction chambers 40a and 40b at a constant ratio regardless of the time of cooling or heating. Is the suction chamber 40
What is necessary is just to provide a damper device etc. in a, 40b, etc.

The indoor units 10a and 10b include indoor heat exchangers 6a and 6b, pressure reducers 5a and 5b, and indoor blowers 7a and 7b.
And the like, and the outdoor units 20a and 20b include compressors 1a and 1b, outdoor heat exchangers 2a and 2b, outdoor blower 3
a, 3b, etc. are provided.

The ventilation unit 30 includes a heat recovery unit 4
a, 4b and a ventilation blower 31 for taking in and exhausting indoor air are provided in the exhaust duct 70.

The exhaust top 71 and the outside air inlet 80 of the exhaust duct 70 are covered with an insect repellent net (not shown) so that insects and the like do not enter the room.

FIG. 3 is a schematic diagram showing the configuration of the ventilation unit 30. The ventilation unit 30 has a housing 32, and the housing 32 is provided with an intake duct mounting portion 34a and a discharge duct mounting portion 34b. I have.

In the housing 32, a heat recovery unit 4 as a plate fin type heat exchanger and a ventilation blower 31 are provided.
When the indoor air taken in through the heat recovery unit 4 passes through the heat recovery unit 4, the air exchanges with the refrigerant circulating in the heat recovery unit 4 and is discharged to be exhausted outside through the duct mounting part 34b.

FIG. 3A shows a case where the heat recovery unit 4 is provided downstream of the ventilation blower 31.
(B) shows the case where the heat recovery unit 4 is provided on the upstream side with respect to the ventilation blower 31.

Next, the air conditioning operation will be described. At the time of cooling, the refrigerant is switched by switching the four-way switching valves 8a and 8b as shown in FIG.
Of the compressors 1a, 1a
b, a cycle is formed in which the outdoor heat exchangers 2a and 2b, the heat recovery units 4a and 4b, the pressure reducers 5a and 5b, and the indoor heat exchangers 6a and 6b are sequentially circulated.

At this time, the outdoor heat exchangers 2a and 2b and the heat recovery units 4a and 4b act as condensers, and the indoor heat exchanger 6
a and 6b function as evaporators.

That is, in the outdoor units 20a and 20b, the refrigerant is compressed by the compressors 1a and 1b to become a high-temperature and high-pressure gas refrigerant, which exchanges heat with the outside air in the outdoor heat exchangers 2a and 2b, and which is mostly liquefied. The refrigerant is sent to the ventilator 30 as a refrigerant in a liquid mixed state.

The refrigerant sent from the outdoor heat exchangers 2a and 2b to the ventilator 30 in this manner is supplied to the heat recovery units 4a and 4a.
In 4b, it is cooled by heat exchange with the room air to be ventilated and sent to the indoor units 10a and 10b.

The heat recovery units 4a and 4b are heat exchangers provided in the middle of the exhaust duct 70.
b is configured such that the room air to be ventilated is blown by the ventilation blower 31.

Therefore, the refrigerant from the outdoor units 20a and 20b exchanges heat with the cooled air exhausted for the ventilation, and the remaining gas refrigerant is liquefied. This increases the thermal efficiency of the cycle.

The refrigerant is sent to the pressure reducers 5a and 5b, the flow rate of the refrigerant is reduced by the pressure reducers 5a and 5b, the pressure is reduced and evaporated by the indoor heat exchangers 6a and 6b, and the air blown to each room is blown. Heat exchange with

As a result, the air blown to each room becomes cold air, and is blown to each living room through the branch chambers 50a and 50b. Thereafter, the refrigerant returns to the outdoor units 20a and 20b, and the cycle goes through one cycle.

During heating, the four-way switching valves 8a, 8b
And the refrigerant is circulated in the direction of the dotted arrow shown in FIG. 1, whereby the compressors 1a, 1b, the indoor heat exchanger 6a,
6b, a cycle of sequentially circulating the pressure reducers 5a and 5b, the heat recovery devices 4a and 4b, and the outdoor heat exchangers 2a and 2b is formed.

At this time, the outdoor heat exchangers 2a and 2b and the heat recovery units 4a and 4b function as evaporators, and the indoor heat exchanger 6a
a and 6b function as condensers.

That is, in the outdoor units 20a and 20b, the refrigerant is compressed by the compressors 1a and 1b to become a high-temperature and high-pressure gas refrigerant, and the indoor heat exchangers 6a and 6b of the indoor units 10a and 10b.
b.

Then, the indoor heat exchangers 6a and 6b exchange heat with the air blown to each room, so that the air blown into each room is heated by the heat of the high-temperature refrigerant and turned into hot air, so that the branch chamber 50a , 50b, the air is blown from each of the blowing chambers 60a, 60b to each of the living rooms.

On the other hand, the high-temperature refrigerant loses heat due to heat exchange, condenses, is throttled by the decompressors 5a, 5b, and sent to the heat recovery units 4a, 4b of the ventilator 30.

In the heat recovery units 4a and 4b of the ventilator 30, the refrigerant exchanges heat with the room air exhausted for ventilation, whereby a part of the refrigerant evaporates and the outdoor unit 20
Return to a and 20b. The refrigerant is supplied to the outdoor heat exchanger 2a,
By exchanging heat with the outside air in 2b, the remaining refrigerant evaporates and returns to the compressors 1a and 1b to make one cycle.

[0043]

According to the present invention, ventilation is performed by a ventilation blower, and the indoor air to be ventilated is blown to a heat recovery device to recover the heat. It is possible to effectively use the heat of the indoor air to be used.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of an air conditioner according to the present invention.

FIG. 2 is a schematic configuration diagram of an air conditioning system using the air conditioner of FIG.

3A and 3B are configuration diagrams of a ventilation unit. FIG. 3A is a diagram illustrating a case where a heat recovery device is provided on the downstream side, and FIG. 3B is a diagram illustrating a case where a heat recovery device is provided on the upstream side.

[Explanation of symbols]

 1a, 1b Compressor 2a, 2b Outdoor heat exchanger 3a, 3b Outdoor blower 4a, 4b Heat recovery unit 5a, 5b Decompressor 6a, 6b Indoor heat exchanger 7a, 7b Indoor blower 8a, 8b Four-way switching valve 10a, 10b Indoor unit 20a, 20b Outdoor unit 30 Ventilation unit 31 Ventilation blower 40a, 40b Suction chamber 50a, 50b Branch chamber 60a, 60b Blowout chamber 70 Exhaust port 80a, 80b Outside air intake

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeo Desk 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Shintaro Sugimoto 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A compressor for compressing a refrigerant, an outdoor heat exchanger for exchanging heat between the refrigerant and the outside air, a decompressor, and an indoor heat exchange for exchanging heat between the refrigerant and air sent to the conditioned room. In an air conditioner equipped with a cooling cycle using an air conditioner, a ventilation blower that draws in and exhausts indoor air, and a heat blown by the air from the ventilation blower to recover heat of the air In the case of cooling, the ventilation unit in which the recovery unit is integrally provided, and in the case of cooling, the refrigerant is circulated in the order of the compressor, the outdoor heat exchanger, the heat recovery unit, the decompressor, and the indoor heat exchanger. A four-way switching valve for circulating a refrigerant in the order of the compressor, an indoor heat exchanger, a decompressor, a heat recovery device, and an outdoor heat exchanger.