JP2001124425A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve problems in a conventional air conditioner that the operating frequency of a compressor should be increased to secure a dehumidifying capacity since the efficiency of an indoor heat exchanger upon dehumidifying operation is deteriorated in a dehumidifying method wherein the indoor heat exchanger is not divided whereby energy saving operation can not be effected and, further, the flow sound of refrigerant is generated upon the dehumidifying operation. SOLUTION: An air conditioner is provided with a refrigerating cycle consisting of a compressor, a four-way valve, an outdoor heat exchanger, an evacuator and a plurality of rows of indoor heat exchangers, which are connected sequentially, a fan for introducing indoor air into the indoor heat exchangers, and an upstream side heat exchanging unit as well as a downstream side heat exchanging unit, which can be a condenser or a re-heater and an evaporator in the direction of row of the indoor heat exchangers.

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 home and industrial use, and more particularly to an air conditioner having a dehumidifying function.

[0002]

2. Description of the Related Art In a conventional air conditioner, a variable displacement compressor such as an in-park is used in order to cope with fluctuations in the air conditioning load, and the rotation frequency of the compressor is controlled according to the magnitude of the air conditioning load. I have. However, when the rotation of the compressor is reduced during the cooling operation, the evaporating temperature also increases, and the dehumidifying capacity of the evaporator decreases, or the evaporating temperature rises above the dew point temperature in the room, and there is a problem that the dehumidifying cannot be performed. Was.

The following air conditioners have been proposed as means for improving the dehumidifying capacity during the cooling low capacity operation. FIG. 5 is a refrigerant circuit diagram of a conventional air conditioner disclosed in, for example, Japanese Patent Publication No. 61-43631. In the figure, 1 is an outdoor unit, 2 compressors, 3 is a four-way valve, 4 is an outdoor heat exchanger, 5 is a first flow control valve, 6 is an indoor unit, 7 is a first indoor heat exchanger, and 8 is a second indoor heat exchanger. The flow control valve 9 is a second indoor heat exchanger. The compressor 2, the four-way valve 3, the outdoor heat exchanger 4,
The flow control valve 5, the first indoor heat exchanger 7, the second flow control valve 8, and the second indoor heat exchanger 9 are sequentially connected by refrigerant pipes 10 and 11, and constitute a refrigeration cycle.

Next, the operation of the conventional air conditioner will be described. First, in a normal cooling operation, the refrigerant exiting the compressor 2 is pseudo-condensed by the outdoor heat exchanger 4 and depressurized by the first flow control valve 5 as shown by a solid line arrow. , A second flow control valve 8, a second decompressor, and a plurality of rows of indoor heat exchangers sequentially connected to each other, wherein a leeward heat exchange is performed in a row direction of the indoor heat exchangers. And a leeward heat exchanger, and all or part of the indoor heat exchanger is thermally separated by an leeward heat exchanger part and a leeward heat exchanger part, A flow control valve is provided between the exchanger unit and the leeward heat exchanger unit, and during the heating operation, the leeward heat exchanger unit, the flow control valve, and the leeward heat exchanger unit are arranged in this order. It is connected so that the refrigerant flows.

On the other hand, during the dehumidifying operation, the first flow control valve 5
And the second indoor heat exchanger 9 operates as a condenser or reheater, the second indoor heat exchanger 9 operates as an evaporator, and the indoor air is controlled. Is overheated in the first indoor heat exchanger 7, so that the dehumidifying operation in which the decrease in room temperature is small can be performed.

[0006]

In the air conditioner as described above, a dehumidification system in which an indoor heat exchanger is not divided is used.
Since the efficiency of the indoor heat exchanger during the dehumidifying operation is reduced, the frequency of the compressor must be increased in order to secure the dehumidifying capacity, and there is a problem that the energy saving operation cannot be performed.

Further, when controlling the flow rate of the refrigerant by the second flow control valve during the dehumidifying operation, the refrigerant at the inlet of the second flow control valve is in a gas-liquid two-phase state, and the flow noise of the refrigerant is generated. There was a problem of becoming.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an air conditioner capable of providing efficient and comfortable low-noise dehumidifying operation.

[0009]

An air conditioner according to a first aspect of the present invention includes a compressor, a four-way valve, an outdoor heat exchanger,
A decompressor and a refrigerating cycle in which indoor heat exchangers configured in a plurality of rows are sequentially connected, wherein the indoor heat exchangers are arranged in a row direction in a windward heat exchanger section and a leeward heat exchanger section. It is composed of

An air conditioner according to a second aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A cycle, wherein the indoor heat exchanger comprises a windward heat exchanger section and a leeward heat exchanger section in the row direction, and all or a part of the indoor heat exchanger is windward heat exchange. And a leeward heat exchanger section, and a flow control valve is provided between the leeward heat exchanger section and the leeward heat exchanger section. The upper heat exchanger, the flow control valve, and the leeward heat exchanger are connected so that the refrigerant flows in this order.

In an air conditioner according to a third aspect of the present invention, an auxiliary heat exchanger is provided in a windward heat exchanger section of the indoor heat exchanger, and during a heating operation, the windward heat exchanger section includes:
The flow control valve and the leeward heat exchanger are connected so that the refrigerant finally flows in the order of the auxiliary heat exchanger.

An air conditioner according to a fourth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. The cycle comprises a windward heat exchanger and a leeward heat exchanger in the row direction of the indoor heat exchanger, and the indoor heat exchangers are integrally provided in the row direction.

An air conditioner according to a fifth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A cycle, a windward heat exchanger in the row direction of the indoor heat exchanger, and a leeward heat exchanger, wherein all or a part of the indoor heat exchanger is a windward heat exchanger. Thermally separated by the leeward heat exchange unit, a flow control valve is provided between the leeward heat exchange unit and the leeward heat exchange unit, and during the heating operation, the leeward heat exchanger unit, The flow control valve and the leeward heat exchanger are connected so that the refrigerant flows in this order, and the indoor heat exchangers are integrally provided in the row direction.

In an air conditioner according to a sixth aspect of the present invention, an auxiliary heat exchanger is provided in a windward heat exchanger section of the indoor heat exchanger, and during a heating operation, the windward heat exchanger section includes:
The indoor heat exchanger connected via the flow control valve and the leeward heat exchanger section so that the refrigerant finally flows in the order of the auxiliary heat exchanger is integrally provided in the row direction. .

An air conditioner according to a seventh aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. In the cycle, a windward heat exchanger and a leeward heat exchanger are arranged in the row direction of the indoor heat exchanger, and the indoor heat exchanger is an arc heat exchanger.

An air conditioner according to an eighth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A leeward heat exchanger section and a leeward heat exchanger section in the row direction of the indoor heat exchanger, and all or part of the indoor heat exchanger is leeward heat exchange. And a leeward heat exchanger section, and a flow control valve is provided between the leeward heat exchanger section and the leeward heat exchanger section. An upper heat exchanger section, the flow control valve, and the leeward heat exchanger section.

An air conditioner according to a ninth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A leeward heat exchanger section and a leeward heat exchanger section in the row direction of the indoor heat exchanger, and all or part of the indoor heat exchanger is leeward heat exchange. And a leeward side heat exchanger part, and a flow control valve is provided between the leeward side heat exchanger part and the leeward side heat exchanger part. An auxiliary heat exchanger is provided in the leeward heat exchanger section. During the heating operation, the auxiliary heat exchanger passes through the leeward heat exchanger section, the flow rate control valve, and the leeward heat exchanger section, and finally the auxiliary heat exchanger. And the indoor heat exchanger is an arc-shaped heat exchanger.

An air conditioner according to a tenth aspect of the present invention includes a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer,
A refrigeration cycle in which indoor heat exchangers configured in a plurality of rows are sequentially connected, the refrigeration cycle including a windward heat exchanger section and a leeward heat exchanger section in the row direction of the indoor heat exchangers. The refrigerant is R410A or R407C or R32 or a hydrocarbon-based refrigerant.

In the air conditioner according to an eleventh aspect of the present invention, the refrigerating machine oil used in the refrigerating cycle is a so-called incompatible oil that does not mix with the refrigerant.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a refrigerant circuit diagram showing an air conditioner according to an embodiment of the present invention,
Parts similar to those of the conventional device are denoted by the same reference numerals. 1 in the figure
Is an outdoor unit, 2 is a compressor, 3 is a four-way valve, 4 is an outdoor heat exchanger, 5 is a first flow control valve, 6 is an indoor unit, and a windward indoor heat exchanger unit 7 and a second flow control valve. 8 and a leeward indoor heat exchanger section 9 in the same fin in the row direction. These compressor 2, four-way valve 3, outdoor heat exchanger 4, first flow control valve 5, windward indoor heat exchanger 7,
The flow control valve 8 and the leeward indoor heat exchanger 9 are connected to the refrigerant pipe 1.
0 and 11 are sequentially connected to form a refrigeration cycle.

Next, the operation of this air conditioner will be described with reference to FIG.
This will be described with reference to the pressure-enthalpy diagram shown in FIG. First, in normal cooling operation, as shown by the heavenly arrow in the figure, high-temperature and high-pressure refrigerant vapor compressed by the compressor 2 (point A in the figure)
Is condensed in the outdoor heat exchanger 4 operating as a condenser (point B in the figure). This liquid refrigerant is decompressed by the first flow control valve 5, becomes a low-temperature low-pressure gas-liquid two-phase refrigerant, flows through the refrigerant pipe 11, and flows into the leeward indoor heat exchanger 9 operating as an evaporator. (Point C in the figure), passes through the second flow control valve 8 and the windward indoor heat exchanger section 7 operating as an evaporator. At this time, the second flow control valve 8 is fully opened, and the leeward indoor heat exchanger 9 and the leeward indoor heat exchanger 7 operate as an evaporator to perform a cooling operation. Further, the refrigerant evaporated in the leeward indoor heat exchanger section 9 and the leeward indoor heat exchanger section 7 passes through the refrigerant pipe 10 and the four-way valve 3 and passes through the compressor 2.
And compressed again (point D in the figure). The liquid refrigerant contracted in the indoor heat exchanger section 9 passes through the pipe 11 and is decompressed by the first flow control valve 5, becomes a low-temperature low-pressure gas-liquid two-phase refrigerant, and operates as an evaporator. 4 (C in the figure)
point). Further, the refrigerant evaporates in the outdoor heat exchanger 4, returns to the compressor 2 through the four-way valve 3, and is compressed again (point D in the figure).

At the time of heating, as indicated by the dashed arrow in the drawing, the high-temperature and high-pressure refrigerant vapor compressed by the compressor 2 (A in the drawing)
Point) flows through the pipe 10 into the windward indoor heat exchanger section 7 operating as a condenser, passes through the second flow rate control valve 8 and the leeward indoor heat exchanger section 9 operating as a condenser, It condenses and liquefies (point B in the figure). At this time, the second flow control valve 8 is in a fully opened state, and the leeward indoor heat exchanger 7 and the leeward indoor heat exchanger 9 operate as a condenser to perform a heating operation. The liquid refrigerant condensed in the leeward indoor heat exchanger 7 and the leeward indoor heat exchanger 9 passes through the pipe 11 and is decompressed by the first flow control valve 5 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. And flows into the outdoor heat exchanger 4 operating as an evaporator (point C in the figure). Further, the refrigerant evaporates in the outdoor heat exchanger 4, returns to the compressor 2 through the four-way valve 3, and is compressed again (point D in the figure).

On the other hand, during the dehumidifying operation, the first flow control valve 5
Is fully opened, and the refrigerant flow rate is controlled by the second flow control valve 8, so that the leeward indoor heat exchanger section 9 operates as a contractor, that is, a reheater, and the leeward indoor heat exchanger section 7 operates as an evaporator. Since the indoor air is heated by the leeward indoor heat exchanger 9, the dehumidification operation in which the decrease in the room temperature is small can be performed.

The operation during the dehumidifying operation will be described with reference to a pressure-enthalpy diagram shown in FIG. In the figure, a solid arrow indicates an air conditioner of the present invention, and a dotted line indicates a conventional air conditioner. The high-temperature and high-pressure refrigerant vapor (point A in the figure) compressed by the compressor 2 is supplied to the outdoor heat exchanger 4 operating as a condenser.
(Point B in the figure), and then decompressed by the fully opened first flow control valve 5 (point B1 in the figure), and flows into the leeward indoor heat exchanger 9 through the pipe 11. , And further condensed and liquefied (32 points in the figure).

This liquid refrigerant is depressurized by the second flow control valve 8, becomes a low-temperature low-pressure gas-liquid two-phase refrigerant, and flows into the windward indoor heat exchanger 7 operating as an evaporator (point C in the figure).
Further, the refrigerant evaporated in the windward indoor heat exchanger unit 7 passes through the pipe 10 and the four-way valve 3, returns to the compressor 2, and is compressed again (point D in the figure).

In the air conditioner of the present invention, the indoor heat exchanger is divided into the leeward side and the leeward side. Since the heat of the container unit 9 can be released, the high pressure decreases during the dehumidifying operation, the subcool increases, and energy saving can be achieved.

Further, the increase of the subcool causes the upstream side of the second flow control valve 8 to be always in the liquid phase during the dehumidification operation, and the flow velocity downstream of the second flow control valve 8 is reduced. The generation of the refrigerant noise generated from the air can be suppressed.

On the other hand, in the conventional air conditioner shown by the broken line, since a sufficient subcool cannot be secured, the efficiency of the indoor heat exchanger during the dehumidifying operation is deteriorated, and the energy saving operation cannot be performed.

Further, since a subcool cannot be secured,
When the refrigerant flow is controlled by the second flow control valve 8 during the dehumidifying operation, the refrigerant at the inlet of the second flow control valve 8 is in a gas-liquid two-phase state, and a refrigerant flow noise is generated.

Embodiment 2 FIG. FIG. 4 shows an indoor heat exchanger according to the second embodiment. In the indoor heat exchanger shown in FIG. 4, the fin member 6 a is formed in a substantially inverted V shape, the outside of the fin member 6 a is defined as the leeward indoor heat exchanger unit 7, and the inside is defined as the leeward indoor heat exchanger unit 9. An auxiliary heat exchanger 12 is provided in the leeward indoor heat exchanger part 7 of the heat exchanger part, and during the heating operation, the leeward indoor heat exchanger part 7, the second flow rate control valve 8, and the leeward indoor heat exchanger part 9 are connected. Finally, it is connected so that the refrigerant flows in the order of the auxiliary heat exchanger 12.

The cooling, heating, and dehumidifying operations of the air conditioner using the indoor heat exchanger are the same as those in the first embodiment shown in FIGS.

The provision of the auxiliary heat exchanger 12 further reduces the high pressure during the dehumidifying operation, thereby further saving energy.

Embodiment 3 FIG. 4 shows an example of an indoor heat exchanger integrally manufactured in the row direction, which is called a substantially inverted V-arc heat exchanger.

The cooling, heating and dehumidifying operations of the air conditioner using the arc heat exchanger are the same as those in the first embodiment shown in FIGS.

Further, since the arc type heat exchange is desired to be manufactured integrally in the column direction, there is an advantage that a slit (not shown) in the column direction can be easily formed and the size can be easily reduced.

Embodiment 4 FIG. By the way, in Embodiments 1 to 3 described above, the case where R22 frequently used in an air conditioner is used has been described. However, R410A, R407C, R32 as a substitute refrigerant or a hydrocarbon-based refrigerant (for example, R50, R170, R290, R
600, R600a, R1150, and R1270), it is clear that the structure and cycle configuration of the indoor unit can be applied, and similar effects can be obtained.

Another characteristic of the alternative refrigerant is that the pressure loss is smaller than that of R22. By utilizing this characteristic, a further energy saving effect can be obtained.

In the fourth embodiment, a so-called incompatible oil (for example, R410
By using an alkylbenzene oil for A), the liquid refrigerant, which hinders the valve opening / closing operation, does not enter the flow control valve, and the reliability of the electromagnetic valve opening / closing operation can be greatly improved.

[0039]

As described above, the air conditioner according to the first aspect of the present invention comprises a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger composed of a plurality of rows. In the refrigeration cycle sequentially connected, since the windward heat exchanger section in the row direction of the indoor heat exchanger, and the leeward heat exchanger section, the high pressure is reduced during the dehumidifying operation,
The subcool increases and energy saving can be achieved. Furthermore, by increasing the subcool, there is an effect that the generation of the refrigerant noise generated from the flow control valve during the dehumidifying operation can be suppressed.

An air conditioner according to a second aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A leeward heat exchanger section and a leeward heat exchanger section in the row direction of the indoor heat exchanger, and all or part of the indoor heat exchanger is leeward heat exchange. And a leeward heat exchanger section, and a flow control valve is provided between the leeward heat exchanger section and the leeward heat exchanger section. Since the refrigerant is connected so that the refrigerant flows in the order of the upper heat exchanger section, the flow control valve, and the leeward heat exchanger section, the high pressure decreases during the dehumidifying operation, the subcool increases, and energy saving can be achieved. Furthermore, by increasing the subcool, there is an effect that the generation of the refrigerant noise generated from the flow control valve during the dehumidifying operation can be suppressed.

In the air conditioner according to a third aspect of the present invention, an auxiliary heat exchanger is provided in the leeward heat exchanger of the indoor heat exchanger, and the leeward heat exchanger,
Through the flow rate control valve and the leeward heat exchanger section, finally, the auxiliary heat exchanger is connected so that the refrigerant flows in the order of the auxiliary heat exchanger. Can be achieved. Further, the increase of the subcool has a result that the generation of the refrigerant noise generated from the flow control valve during the dehumidifying operation can be suppressed.

An air conditioner according to a fourth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger having a plurality of rows are sequentially connected. A cycle, comprising a windward heat exchanger section in the row direction of the indoor heat exchanger, and a leeward heat exchanger section, and the indoor heat exchanger is integrally formed in the row direction. This has the effect that the slits in the directions can be easily formed and the size can be easily reduced.

An air conditioner according to a fifth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A leeward heat exchanger section and a leeward heat exchanger section in the row direction of the indoor heat exchanger, and all or part of the indoor heat exchanger is leeward heat exchange. And a leeward heat exchanger section, and a flow control valve is provided between the leeward heat exchanger section and the leeward heat exchanger section. Since the upper heat exchanger section, the flow control valve, and the leeward heat exchanger section are connected so that the refrigerant flows in this order and the indoor heat exchanger is integrally formed in the row direction, a slit in the row direction is easy to make,
In addition, there is an effect that compacting becomes easy.

In the air conditioner according to a sixth aspect of the present invention, an auxiliary heat exchanger is provided in the windward heat exchanger of the indoor heat exchanger.
The flow rate control valve, via the leeward heat exchanger section, and finally, the indoor heat exchanger connected so that the refrigerant flows in the order of the auxiliary heat exchanger is integrally configured in the row direction, This has the effect that the slits in the directions can be easily formed and the size can be easily reduced.

An air conditioner according to a seventh aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A cycle, comprising a windward heat exchanger section in the row direction of the indoor heat exchanger, and a leeward heat exchanger section, and the indoor heat exchanger is configured as an arc-shaped heat exchanger, so that it is compact. This has the effect of making the conversion easy.

An air conditioner according to an eighth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. And a windward heat exchanger section in the row direction of the indoor heat exchanger, and a leeward heat exchanger section,
All or part of the indoor heat exchanger is thermally separated at the leeward heat exchanger part and the leeward heat exchanger part, and between the leeward heat exchanger part and the leeward heat exchanger part. Is provided with a flow control valve, and during the heating operation, the leeward heat exchanger section, the flow control valve, and the leeward heat exchanger section are connected so that the refrigerant flows in this order, and the indoor heat exchanger is an arc type. Since it is configured as a heat exchanger, there is an effect that the size can be easily reduced.

An air conditioner according to a ninth aspect of the present invention is a refrigeration system in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and an indoor heat exchanger configured in a plurality of rows are sequentially connected. A leeward heat exchanger section and a leeward heat exchanger section in the row direction of the indoor heat exchanger, and all or part of the indoor heat exchanger is leeward heat exchange. And a leeward side heat exchanger part, and a flow control valve is provided between the leeward side heat exchanger part and the leeward side heat exchanger part. An auxiliary heat exchanger is provided in the leeward heat exchanger section. During the heating operation, the auxiliary heat exchanger passes through the leeward heat exchanger section, the flow rate control valve, and the leeward heat exchanger section, and finally the auxiliary heat exchanger. Since the refrigerant is connected so that the refrigerant flows in the following order, and the indoor heat exchanger is configured as an arc heat exchanger, Has the effect of compact reduction is facilitated.

An air conditioner according to a tenth aspect of the present invention includes a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer,
A refrigeration cycle in which indoor heat exchangers configured in a plurality of rows are sequentially connected, the refrigeration cycle including a windward heat exchanger section and a leeward heat exchanger section in the row direction of the indoor heat exchangers. Since the refrigerant is composed of R410A or R407C or R32 or a hydrocarbon-based refrigerant, the pressure loss is small, and the effect of enabling further energy saving can be obtained.

[0049] In the air conditioner according to the eleventh aspect of the present invention, the refrigerating machine oil used in the refrigerating cycle is composed of a so-called incompatible oil which does not mix with the refrigerant. The liquid refrigerant is prevented from invading and the effect of improving the reliability of the electromagnetic valve opening / closing operation is improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a refrigerant showing an air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is a pressure-enthalpy diagram showing an operation during a normal operation of the air conditioner according to Embodiment 1 of the present invention.

FIG. 3 is a pressure-enthalpy diagram showing an operation during a split operation of the air conditioner according to Embodiment 1 of the present invention.

FIG. 4 is a schematic explanatory view showing an indoor heat exchanger of an air conditioner according to Embodiments 2 and 3 of the present invention.

FIG. 5 is a refrigerant circuit of a conventional air conditioner.

[Explanation of symbols]

2 compressor, 3 four-way valve, 4 outdoor heat exchanger, 5 first
Flow control valve, 7 leeward indoor heat exchanger, 8 second flow control valve, 9 leeward indoor heat exchanger, 10 refrigerant pipe,
11 refrigerant piping, 12 auxiliary heat exchanger.

Continuation of the front page (72) Inventor Yoshihiro Tanabe 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Nao Saito 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. F term in the company (reference) 3L051 BE04 BE05 BE07

Claims (11)

[Claims] 1. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor and a plurality of rows of indoor heat exchangers are sequentially connected, wherein the indoor heat exchangers are arranged in rows. An air conditioner comprising: a windward heat exchanger and a leeward heat exchanger. 2. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and a plurality of rows of indoor heat exchangers are sequentially connected. A leeward heat exchanger section and a leeward heat exchanger section, and all or part of the indoor heat exchanger is thermally separated by the leeward heat exchanger section and the leeward heat exchanger section. Separated into
A flow control valve is provided between the leeward heat exchanger part and the leeward heat exchanger part. During the heating operation, the leeward heat exchanger part, the flow control valve, and the leeward heat exchange are provided. An air conditioner characterized in that the air conditioner is connected so that the refrigerant flows in the order of the components. 3. An auxiliary heat exchanger is provided in the leeward heat exchanger of the indoor heat exchanger, and during the heating operation, the leeward heat exchanger, the flow control valve, and the leeward heat exchanger are provided. 2. The air conditioner according to claim 1, wherein the air conditioner is connected so that the refrigerant flows in the order of the auxiliary heat exchanger at the end. 4. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and a plurality of rows of indoor heat exchangers are sequentially connected. An air conditioner comprising: a windward heat exchanger section and a leeward heat exchanger section in the direction, and wherein the indoor heat exchangers are integrated in the row direction. 5. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and a plurality of rows of indoor heat exchangers are sequentially connected, wherein the row of the indoor heat exchangers is provided. A leeward heat exchanger section and a leeward heat exchanger section, and all or part of the indoor heat exchanger is thermally separated by the leeward heat exchanger section and the leeward heat exchanger section. Separated into
A flow control valve is provided between the leeward heat exchanger part and the leeward heat exchanger part. During the heating operation, the leeward heat exchanger part, the flow control valve, and the leeward heat exchange are provided. The air conditioner, wherein the indoor heat exchangers connected so that the refrigerant flows in the order of the compartments are integrated in the row direction. 6. An auxiliary heat exchanger is provided in the leeward heat exchanger of the indoor heat exchanger, and during the heating operation, the leeward heat exchanger, the flow control valve, and the leeward heat exchanger are provided. The air conditioner is characterized in that the indoor heat exchanger, which is connected so that the refrigerant finally flows in the order of the auxiliary heat exchanger via the auxiliary heat exchanger, is integrated in the row direction. 7. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and a plurality of rows of indoor heat exchangers are sequentially connected, wherein the row of the indoor heat exchangers is provided. An air conditioner comprising a windward heat exchanger section and a leeward heat exchanger section in the direction, wherein the indoor heat exchanger is an arc-shaped heat exchanger. 8. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and a plurality of rows of indoor heat exchangers are sequentially connected, wherein the row of the indoor heat exchangers is provided. A leeward heat exchanger section and a leeward heat exchanger section, and all or part of the indoor heat exchanger is thermally separated by the leeward heat exchanger section and the leeward heat exchanger section. Separated into
A flow control valve is provided between the leeward heat exchanger part and the leeward heat exchanger part. During the heating operation, the leeward heat exchanger part, the flow control valve, and the leeward heat exchange are provided. The air conditioner is connected so that the refrigerant flows in the order of the heat exchangers, and the indoor heat exchanger is an arc heat exchanger. 9. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor and a plurality of rows of indoor heat exchangers are sequentially connected, wherein the row of the indoor heat exchangers is provided. A leeward heat exchanger and a leeward heat exchanger, and all or part of the indoor heat exchanger is thermally separated by the leeward heat exchanger and the leeward heat exchanger. A flow control valve is provided between the leeward heat exchanger and the leeward heat exchanger, and an auxiliary heat exchanger is provided on the leeward heat exchanger of the indoor heat exchanger. During the heating operation, the leeward heat exchanger, the flow control valve, and the leeward heat exchanger are connected so that the refrigerant finally flows in the order of the auxiliary heat exchanger, and the indoor heat exchange is performed. An air conditioner characterized in that the heat exchanger is an arc heat exchanger. 10. A refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, a decompressor, and a plurality of rows of indoor heat exchangers are sequentially connected, wherein the row of the indoor heat exchangers is provided. The refrigerant is R410A or R407C or R32 in the direction comprising a windward heat exchanger section and a leeward heat exchanger section.
An air conditioner characterized by being a hydrocarbon-based refrigerant. 11. The air conditioner according to claim 10, wherein the refrigerating machine oil used in the refrigerating cycle is a so-called immiscible oil that does not mix with the refrigerant.