JPH11344236A - Air conditioner - Google Patents

Abstract

(57) [Problem] To provide an air conditioner in which dehumidification is improved without generating cool air and the dehumidification efficiency is improved while maintaining a room temperature at a predetermined temperature. SOLUTION: Two outdoor units capable of switching between cooling and heating operations are connected to one indoor unit, and in this indoor unit, a first heating operation is performed on front sides 92a of a plurality of flat plate fins 92. A refrigerant pipe 93 is disposed, a second refrigerant pipe 94 that is performing a cooling operation is disposed on a rear side 92b, and a slit 92c (gap) is formed between the front side 92a and the rear side 92b to form a first refrigerant pipe. The solid heat conduction between the refrigerant pipe 93 and the second refrigerant pipe 94 was minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to cooling and heating by providing two indoor heat exchangers in an indoor unit in parallel and connecting one indoor unit to two outdoor units via different refrigerant path lines. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type air conditioner that performs an operation, and more specifically, an air conditioner that improves dehumidifying efficiency by maintaining indoor temperature at a predetermined temperature, for example, 23 to 25 ° C. while removing moisture without generating cool air. About.

[0002]

2. Description of the Related Art In general, air conditioners are classified into various types according to functions and unit configurations. However, in terms of functions, air conditioners can be classified into cooling only, cooling and dehumidification only, and cooling and heating. In terms of the configuration, the cooling and heat dissipation functions are integrated into one unit, such as a window, and the cooling unit is installed indoors, and the heat dissipation and compression units are installed separately outside the room. .

The separation type air conditioners include a multi-type air conditioner in which two outdoor units are compressed and two or more four-way valves are connected to two or more indoor units to air-condition a plurality of indoor spaces.

As shown in FIG. 1, in such a conventional separation type air conditioner, an indoor unit 100 provided indoors and an outdoor unit 110 provided outdoors are operated by one system, and if necessary, heating is performed. It can be an operation and a cooling operation.

[0005] The outdoor unit 110 includes a compressor 120 for compressing a refrigerant into a high-temperature and high-pressure gas state, and a compressor 12 for compressing the refrigerant.
The gas refrigerant compressed to a high temperature and a high pressure at 0
An outdoor heat exchanger 130 that exchanges heat with the air blown by 1 and cools and condenses it into a normal-temperature and high-pressure liquid-phase refrigerant, and a low-temperature that easily vaporizes the normal-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger 130. Capillary tube 1 for decompressing and expanding into low-pressure mist refrigerant
The indoor unit 100 is provided with a low-temperature and low-pressure mist-like refrigerant that has passed through the capillary tube 135.
An indoor heat exchanger 140 is provided for exchanging heat with the air blown by 41 and evaporating it while converting it into a low-temperature, low-pressure refrigerant gas in a completely gaseous state.

In the air conditioner configured as described above, the refrigerant cycle during the cooling and dehumidifying operations is the same, and the refrigerant cycle is performed in the direction of the solid line arrow in FIG.

First, when a high-temperature and high-pressure gas refrigerant discharged from the compressor 120 of the outdoor unit 110 flows into the outdoor heat exchanger 130, the gas refrigerant compressed to a high temperature and high pressure is discharged in the outdoor heat exchanger 130. Is exchanged with the air blown by the outdoor fan 131 to be forcibly cooled and condensed, and the room-temperature and high-pressure liquid-phase refrigerant condensed by the outdoor heat exchanger 130 flows into the capillary 135.

The liquid refrigerant at normal temperature and high pressure which has flowed into the capillary tube 135 is expanded into a low-temperature and low-pressure mist-like refrigerant which is easy to evaporate, and flows into the indoor heat exchanger 140 provided in the indoor unit 100, where the indoor heat exchanger 140 is provided. When the refrigerant evaporates and evaporates in the heat exchanger 140, the heat is removed from the air blown by the indoor fan 141 to cool the indoor air, and then the cooled air (cold air) is discharged into the room to perform cooling or cooling. The dehumidifying operation is performed, and the low-temperature and low-pressure gas refrigerant cooled in the indoor heat exchanger 140 is converted into a refrigerant gas, and the above-described refrigerant cycle is repeated.

At this time, when the indoor unit 100 is in the cooling operation, the indoor fan 141 is driven by the air volume set by the user to perform the cooling operation, and when the indoor unit 100 is in the dehumidifying operation, the indoor fan 141 is reduced to the minimum air volume. To perform dehumidification operation.

[0010]

However, according to the dehumidifying operation method of the air conditioner configured as described above, the room temperature is appropriate during the rainy season or the like, or since the humidity is high in a low state, the dehumidifying operation is performed. When the operation is performed, the operation is performed by reducing only the indoor air volume in the same refrigerant cycle as the cooling operation, but at this time, since the cold air exchanged in the indoor heat exchanger 140 is discharged, the actual operation is performed. The indoor temperature exchanger 1
There was a problem that the temperature of 40 was too low and the dehumidifying efficiency was significantly reduced.

Further, since the user cannot arbitrarily set the dehumidifying operation to raise the room temperature, a separate electric heater is provided to realize the non-cooled air dehumidifying operation.

The present invention has been made in order to solve the above-mentioned various problems, and an object of the present invention is to provide:
By connecting two outdoor units performing cooling operation and heating operation with different refrigerant path lines to two indoor heat exchangers respectively, one outdoor unit passes behind the indoor heat exchanger by cooling operation. The air (cold air) formed by the low-temperature and low-pressure refrigerant is appropriately mixed with the air (warm air) formed by the high-temperature and high-pressure refrigerant passing the front side of the indoor heat exchanger by the heating operation of the other outdoor unit. It is an object of the present invention to provide an air conditioner that discharges moisture without generating cool air, removes moisture, maintains room temperature at a predetermined temperature, and improves dehumidification efficiency.

Another object of the present invention is to provide a high-temperature, high-pressure refrigerant flowing in front of a single indoor heat exchanger provided in an indoor unit and a low-temperature, low-pressure refrigerant flowing in the rear side during dehumidifying operation. The air conditioner which can reduce the processing cost and the number of processes by integrally manufacturing the indoor heat exchanger in one process so that the heat transfer through To provide.

[0014]

SUMMARY OF THE INVENTION An air conditioner according to the present invention, which has been made to achieve the above object, has an indoor heat exchanger provided in an indoor unit, and is independent of the indoor heat exchanger. A first outdoor unit that is connected to a refrigerant path line and circulates high-temperature and high-pressure refrigerant during heating operation, and that is connected to a refrigerant path line that is independent of the indoor heat exchanger and circulates low-temperature and low-pressure refrigerant during cooling operation In the air conditioner provided with a second outdoor unit to be supplied, the indoor heat exchanger is provided with a different refrigerant path line for each of the first and second outdoor units, and one of the indoor heat exchangers is provided during heating or cooling operation. At the same time, or at the time of dehumidifying operation by switching to heating and cooling operations, respectively, is partially integrated into a predetermined position that is integrated into one so as to be used for common use and sorted into different areas. Characterized in that the gap is formed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described below in detail with reference to FIGS.

FIG. 2 is a refrigerant cycle diagram of the air conditioner according to the present invention, and shows one indoor unit 10 provided indoors.
And the first and second two outdoor units 20.
21 is operated by one system, and can perform a cooling / heating operation as needed.

The first and second outdoor units 20 and 21 are respectively provided with first and second outdoor units 20 and 21 for compressing the refrigerant into a high-temperature and high-pressure gas state.
The first and second compressors 30 and 31 convert the flow of the gas refrigerant compressed to a high temperature and a high pressure by the first and second compressors 30 and 31 according to the cooling condition or the heating condition, respectively.
The four-way valves 40 and 41, and the first and second outdoor sides for cooling and condensing a gas refrigerant compressed to a high-temperature and high-pressure by the first and second compressors 30 and 31 into a low-temperature and high-pressure liquid-phase refrigerant during the cooling operation, respectively. The first and second outdoor heat exchangers by sucking outdoor air so as to facilitate heat exchange between the heat exchangers 50 and 51 and the first and second outdoor heat exchangers 50 and 51; 50 ・ 51
1st and 2nd outdoor fans 50a and 5 that blow air to
1a and the low-temperature and high-pressure liquid-phase refrigerant connected to the indoor unit 10 and cooled and condensed in the first and second outdoor-side heat exchangers 50 and 51 are decompressed and expanded into low-temperature and low-pressure mist-like refrigerants that are easy to evaporate. The first and second capillaries 60 and 61 to be cooled and the refrigerant liquefied by an indoor heat exchanger to be described later during the heating operation are transferred to the first and second capillaries.
The first and second heating capillary tubes 70 and 71, which decompress and expand into low-temperature and low-pressure mist refrigerant that easily evaporates together with the second capillary tubes 60 and 61, and the refrigerant in one direction so that the refrigerant passes only during cooling operation. There are provided first and second one-way valves 80 and 81 which respectively flow only.

On the other hand, the indoor unit 10 converts the low-temperature and low-pressure mist refrigerant passing through the first and second capillaries 60 and 61 into a low-temperature and low-pressure completely gaseous refrigerant gas during the cooling operation. An indoor heat exchanger 90 is provided, and an indoor fan 90a that circulates indoor air so that heat exchange in the indoor heat exchanger 90 is smooth.

That is, the indoor heat exchanger 90 shown in FIG.
As shown in FIG.
A plurality of flat plate fins 92 made of aluminum or aluminum alloy material arranged in parallel at a predetermined interval so that heat is transmitted while an air flow passes between the end plates 91; The staggered upper and lower staggers are formed such that different refrigerant path lines are formed on the front side and the rear side of the end plate 91 and the plurality of flat plate fins 92 so that the refrigerant flowing from the heat sink 21 is thermally conducted to the plurality of flat plate fins 92. First and second refrigerant pipes 93 and 94 inserted in the shape direction
And a plurality of return band pipes 95 connecting the ends of the two first and second refrigerant pipes 93 and 94 as a pair and projecting to the outside of the two end plates 91. ing.

At this time, as shown in FIG. 4, a front side 92a and a rear side 92b
When the dehumidifying operation is performed by providing different refrigerant pass lines required for the heating operation and the cooling operation, the gas is generated by the high-temperature and high-pressure gas refrigerant passing through the plurality of first refrigerant pipes 93 provided on the front side 92a. A plurality of slits 92c are provided so as to minimize the transfer of the heat generated by the low-temperature and low-pressure mist refrigerant passing through the plurality of second refrigerant pipes 94 provided on the rear side 92b.
Are formed.

Next, the operation and effect of the present invention thus configured will be described.

When the first and second compressors 30 and 31 and the first and second outdoor fans 50a and 51a are turned on by applying voltage to the air conditioner, the first and second outdoor units 20 and 51a are turned on.
The high-temperature and high-pressure gas refrigerant from the first and second compressors 30 and 31 is passed through the first and second four-way valves 40 and 41 to the first and second compressors 30 and 31.
Into the outdoor heat exchangers 50 and 51 of the first and second heat exchangers.
In the outdoor heat exchangers 50 and 51, the gas refrigerant compressed to a high temperature and a high pressure is exchanged with the air blown by the first and second outdoor fans 50a and 51a to be forcibly cooled and condensed. The low-temperature and high-pressure liquid-phase refrigerant condensed in the second outdoor heat exchangers 50 and 51 is supplied to the first and second one-way valves 80 and 8.
1 and flow into the first and second capillary tubes 60 and 61.

Further, the low-temperature and high-pressure liquid-phase refrigerant flowing into the first and second capillary tubes 60 and 61 is expanded into a low-temperature and low-pressure mist-like refrigerant that is easily evaporated, and the indoor heat exchange provided in the indoor unit 10 is performed. A large number of low-temperature and low-pressure atomized refrigerants are introduced into the front end and the rear end of the heat exchanger 90 along different refrigerant path lines, respectively, and depressurized through the first and second capillary tubes 60 and 61 in the indoor heat exchanger 90. When evaporating and vaporizing while passing through individual heat transfer tubes (not shown), heat is taken from the air blown by the indoor fan 90a to cool the indoor air, and then the cooled air (cool air) is introduced into the room. A cooling operation for discharging is performed.

At this time, the low-temperature and low-pressure gaseous refrigerant cooled by the indoor heat exchanger 90 flows into the first and second compressors 30 and 31 again through the first and second four-way valves 40 and 41. The first and second outdoor units 20 are converted into a high-temperature and high-pressure refrigerant gas by the compression action of the first and second compressors 30 and 31 and repeat the refrigerant cycle along the solid arrow direction in FIG.
・ 21 performs indoor cooling.

On the other hand, when the dehumidifying operation signal is input during the cooling operation, the first outdoor unit 20 causes the refrigerant to flow along the dotted arrow direction in FIG. 2 from the first compressor 30 to the first four-way valve 40 to the indoor. One side of the heat exchanger 90 → the first capillary tube 60 → the first heating capillary tube 70 → the first outdoor heat exchanger 50 → the first four-way valve 4.
A refrigerant cycle that is circulated in the order of 0 → first compressor 30 is formed.

That is, the first four-way valve 40 switches to the heating operation, and the high-temperature and high-pressure gaseous refrigerant discharged from the first compressor 30 of the first outdoor unit 20 passes through the first four-way valve 40 to the indoor unit. 10 flows into one side of the indoor heat exchanger 90 provided in the inside 10, and at one side of the indoor heat exchanger 90, heat of the high-temperature and high-pressure gas refrigerant is exchanged by air blown from the indoor fan 90 a to be at normal temperature. A heating operation for discharging air (warm air) warmed by cooling to a high-pressure refrigerant into a room is performed.

Further, the refrigerant liquefied on one side of the indoor heat exchanger 90 is decompressed and expanded into a low-temperature and low-pressure mist-like refrigerant which easily evaporates through the first capillary tube 60 and the first heating capillary tube 70, and the first refrigerant is vaporized. Into the outdoor heat exchanger 50 of the
In the outdoor heat exchanger 50, the low-temperature and low-pressure atomized refrigerant is cooled by exchanging heat with air blown by the first outdoor fan 50a, and is cooled by the first outdoor heat exchanger 50. The low-pressure gaseous refrigerant passes through the first four-way valve 40 again to the first
The first outdoor unit 20 repeats the refrigerant cycle in the direction indicated by the dotted line arrow in FIG. 2 by performing the heating operation by being converted into the high-temperature and high-pressure refrigerant gas by the compression action of the first compressor 30. I do.

At this time, since the second four-way valve 41 of the second outdoor unit 21 keeps the cooling operation state as it is, the second outdoor unit 21 performs the refrigerant cycle in the direction of the solid line arrow in FIG. The cooling operation is performed repeatedly.

As described above, when the operation is switched to the dehumidifying operation during the cooling operation, the first outdoor unit 20 performs the heating operation, and the second outdoor unit 21 performs the cooling operation, the first compressor 30 starts operating. The discharged high-temperature and high-pressure gaseous refrigerant travels along an independent refrigerant path line and the indoor heat exchanger 9 provided in the indoor unit 10.
The low-temperature and low-pressure atomized refrigerant that has flowed into one side of the indoor unit 10 and decompressed through the second capillary tube 61 travels along an independent refrigerant path line to the other side of the indoor heat exchanger 90 provided in the indoor unit 10. The inflow refrigerant cycle is repeated.

At this time, the indoor heat exchanger 90 is provided with a plurality of flat plate fins 92 at predetermined intervals so as to be parallel between the two end plates 91 so that the heat is transmitted while air is passed between the two end plates 91. In the center between the front side 92a and the rear side 92b of the plurality of flat fins 92, a plurality of slits 9 are provided.
2c is formed in the vertical direction, the first outdoor unit 20
The high-temperature and high-pressure gas refrigerant passes through the independent refrigerant pass line formed by the plurality of first refrigerant pipes 93 and the return band pipes 95, passes through the front side 92a of the flat plate fin 92, and generates heat. In the second outdoor unit 21, the low-temperature and low-pressure mist refrigerant passes through the rear side 92b of the flat plate fin 92 along an independent refrigerant path line formed by the plurality of second refrigerant pipes 94 and the return band pipes 95. Mutual electric heating with the generated cold is minimized by the gap (GAP) formed by the slit 92c.

That is, although the front side 92a and the rear side 92b of the flat plate fin 92 are processed into one member by one process, a plurality of slits 9 formed in the center thereof are formed.
With the width of 2c, the effect of being separated at a predetermined interval is obtained, and the heat generated from the high-temperature and high-pressure gaseous refrigerant passed through the independent refrigerant path line on the front side 92a by these slits 92c is generated on the rear side. The heat generated by the low-temperature and low-pressure atomized refrigerant that is transmitted through the independent refrigerant path line on the rear side 92b is not easily transmitted to the front side 92a. Become.

Therefore, the air (cold air) which is exchanged and passed through the rear side 92b of the flat plate fins 92 of the indoor heat exchanger 90 in accordance with the cooling operation of the second outdoor unit 21 flows through the first outdoor unit.
When passing through the front side 92a of the flat fins 92 of the indoor heat exchanger 90 that dissipates heat in accordance with the heating operation of the outdoor unit 20, a mixed air (air at an intermediate temperature in which cold air and hot air are mixed) is formed. In addition, by being discharged to the discharge port of the indoor unit 10, the moisture contained in the cold air is removed, and the dehumidifying operation for maintaining the predetermined temperature is performed.

On the other hand, when a heating operation signal is input to the first and second outdoor units 20 and 21, the refrigerant is discharged along the first and second compressors 30 and 31 to the first and second compressors 30 and 31 in the direction of the dotted arrow in FIG. 2 four-way valve 40, 41 → indoor heat exchanger 90 → 1st, 2nd capillary tube 60
・ 61 → first and second heating capillary tubes 70 and 71 → first and second
Outdoor heat exchangers 50 and 51 → first and second four-way valves 40 and 51
A refrigerant cycle is circulated in the order of 41 → first and second compressors 30 and 31.

That is, the high-temperature and high-pressure gaseous refrigerant discharged from the first and second compressors 30 and 31 of the first and second outdoor units 20 and 21 passes through the first and second four-way valves 40 and 41 to the indoor unit 10. In the indoor heat exchanger 90, the heat of the high-temperature and high-pressure gaseous refrigerant is generated by the air blown from the indoor fan 90a. The air passing through the indoor heat exchanger 90 discharges warmed air (warm air) into the room to perform a heating operation by exchanging the refrigerant and cooling it to a normal-temperature high-pressure refrigerant.

Further, the refrigerant liquefied in the indoor heat exchanger 90 is decompressed into a low-temperature low-pressure mist refrigerant which is easily evaporated through the first and second capillary tubes 60 and 61 and the first and second heating capillary tubes 70 and 71. Expanded first and second outdoor heat exchangers 5
0.51 and the first outdoor heat exchanger 50.
At 51, the low-temperature and low-pressure mist refrigerant is cooled by exchanging heat with air blown by the first and second outdoor fans 50a and 51a, and cooled by the first and second outdoor heat exchangers 50 and 51. The low-temperature and low-pressure gas refrigerant is supplied to the first and second four-way valves 40 and 41.
The refrigerant flows into the first and second compressors 30 and 31 again, and is converted into a high-temperature and high-pressure refrigerant gas by the compression action of the first and second compressors 30 and 31, so that the first and second outdoor units 20 and 31 are cooled. 21 performs the heating operation by repeating the refrigerant cycle in the direction of the dotted arrow in FIG.

[0036]

As described above, according to the air conditioner of the present invention, the first and second two outdoor units are connected to the indoor heat exchangers provided in one indoor unit by different refrigerant path lines. Are configured to be connected to each other to perform the cooling operation and the heating operation, respectively. Therefore, the air heat exchanged behind the indoor heat exchanger according to the cooling operation of the second outdoor unit is performed. (Cold air) is mixed with air (hot air) heat-exchanged on the front side of the indoor heat exchanger according to the heating operation of the first outdoor unit, and mixed air (intermediate temperature air in which cold air and hot air are mixed) In addition to removing the moisture contained in the cold air, the dehumidifying operation can be improved, and the dehumidifying operation of maintaining the predetermined temperature of 23 to 25 ° C. can be performed. Of course, moisture in winter There is an effect that removed by is also possible.

Further, the flat fins of the indoor heat exchanger are integrally processed in a single step with the front side through which the refrigerant pass line required for heating passes and the rear side through which the refrigerant pass line necessary for cooling passes during the dehumidifying operation. In addition, multiple slits are formed at the center of each of them to minimize heat transfer to each other, which reduces the processing cost and the number of processes required when separately manufacturing indoor heat exchangers for heating and cooling. There is also an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a refrigerant cycle diagram of a conventional air conditioner.

FIG. 2 is a refrigerant cycle diagram of the air conditioner according to the present invention.

FIG. 3 is an exploded perspective view showing one indoor heat exchanger of the present invention.

FIG. 4 is a side view showing flat fins of one indoor heat exchanger according to the present invention.

[Explanation of symbols]

10 Indoor unit 20 ・ 21 First
2 outdoor unit 90 indoor heat exchanger 92 flat fin 92a front 92b rear 92c slit

Claims (3)

[Claims] 1. An indoor heat exchanger provided in an indoor unit, and a first outdoor unit connected to a refrigerant path line independent of the indoor heat exchanger and circulating and supplying a high-temperature and high-pressure refrigerant during a heating operation. A second outdoor unit connected to a refrigerant path line independent of the indoor heat exchanger and supplying low-temperature and low-pressure refrigerant during cooling operation, wherein the indoor heat exchanger is When a different refrigerant path line is provided for each of the outdoor units 1.2 and is switched to one simultaneously during heating or cooling operation, or when each is switched to heating and cooling operation and dehumidification operation is performed, An air conditioner characterized in that a gap is partially formed at a predetermined position where it is integrated into one and divided into different areas for use. 2. In a case where different refrigerant path lines required for heating operation and cooling operation are provided on the front side and the rear side of the indoor heat exchanger, respectively, and the dehumidification operation is performed, a high-temperature and high-pressure passage through the front refrigerant path line is performed. The front and rear sides of the indoor heat exchanger so that the heat generated by the refrigerant and the cold generated by the low-temperature and low-pressure refrigerant passing through the rear refrigerant path line are minimized from being transferred to each other. The air conditioner according to claim 1, wherein a plurality of slits are formed between the slits. 3. The plurality of slits are respectively penetrated at predetermined intervals in the vertical direction at the center between the front side and the rear side of the plurality of flat fins constituting the indoor heat exchanger. The air conditioner according to claim 2.