JP2014219138A - Air conditioner outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique relating to an outdoor unit of a heat pump-type air conditioner and capable of ensuring drainage of molten water in a short time during defrosting operation in an outdoor heat exchanger.SOLUTION: An outdoor heat exchanger 4 in an outdoor unit 2 of an air conditioner comprises: a plurality of divided heat exchangers 7 constituted by a number of vertically long plate fins 5 provided in parallel at predetermined intervals and a number of heat transfer tubes provided horizontally to penetrate the plate fins 5, and formed by dividing the plate fins 5 horizontally; and water drainage plates 8 provided between the vertically adjacent divided heat exchangers 7 and discharging molten water generated during a defrosting operation from lower ends of divided plate fins 51. With this configuration, the molten water generated in the divided plate fins 51 during the defrosting operation can be promptly fed to below the divided plate fins 51 of the divided heat exchangers 7 at a short distance and can be discharged from the water drainage plates 8. Furthermore, it is possible to reduce defrosting operation time and improve a heating capability.

Description

The present invention relates to an outdoor unit of an air conditioner, and is a technique that can reliably drain water from molten water during a defrosting operation in an outdoor heat exchanger.

In the heating operation of the heat pump type air conditioner, the air resistance of the outdoor heat exchanger is frosted on the surface of the plate-like fins of the outdoor heat exchanger provided in the outdoor unit when the outside air is at low temperature and high humidity. And increase in heat exchange performance.
Furthermore, when the amount of frost on the plate-like fins of the outdoor heat exchanger increases, the evaporation temperature and condensation temperature decrease, the heating capacity decreases, etc., and the suction pressure to the compressor decreases and the liquid back is generated, resulting in compression. It will affect the durability of the machine.

Therefore, the frosting state of the outdoor heat exchanger is detected, the heating operation is stopped and the defrosting operation is performed, and the defrosting operation time is shortened in order to minimize the decrease in the heating capacity. There is a need.
The molten water during the defrosting operation travels down the vertically long plate-like fins and falls. However, when switching to heating operation while adhering to the lower part of the plate-like fins, the molten water freezes in a short time and frequently You will have to defrost.

For this reason, conventionally, a heat exchanger having a plate-like fin having a structure that facilitates draining of molten water is known (see, for example, Patent Document 1 and Patent Document 2).
The plate-like fin of the conventional heat exchanger described in Patent Document 1 forms the entire region excluding the penetrating portion of the heat transfer tube in a waveform composed of peaks and valleys in the vertical direction.

Moreover, the plate-like fin of the conventional heat exchanger described in Patent Document 2 is provided with a plurality of punched holes and a plurality of strips passing through these punched holes in the vertical direction at intervals.

JP-A-6-82189 Japanese Patent Publication No.53-46498

In the conventional techniques described in Patent Literature 1 and Patent Literature 2, the plate-like fins are corrugated, or a groove is formed in the plate-like fins to make it easier for molten water generated by the defrosting operation to flow downward.
However, these conventional techniques have a problem that drainage takes time because the vertically long plate-like fins are integrally formed from the upper end to the lower end, and the distance to which the molten water flows by defrosting operation is long.

Therefore, in the prior art, it took time for draining of the molten water by the defrosting operation, and there was a limit in preventing a decrease in heating capacity due to shortening of the heating operation time.
An object of the present invention is to solve the problems in the conventional air conditioners described in Patent Document 1 and Patent Document 2, and to reliably drain the molten water in a short time during the defrosting operation in the outdoor heat exchanger. It is said.

The outdoor unit of the air conditioner of the present invention has a number of vertically long plate-like fins arranged in parallel at a predetermined interval, and a number of heat transfer tubes arranged horizontally through the plate-like fins, In an outdoor unit of an air conditioner comprising an outdoor heat exchanger that functions as an evaporator during heating operation, and an outdoor fan that distributes outside air to the outdoor heat exchanger,
A plurality of divided heat exchangers formed by dividing plate-like fins in the horizontal direction;
It is provided between the split heat exchangers adjacent to each other in the vertical direction, and includes a draining plate that drains the molten water during the defrosting operation from the lower end of the plate-like fins.

The outdoor unit of the air conditioner of the present invention is arranged between a plurality of divided heat exchangers formed by dividing plate-like fins in the horizontal direction and the divided heat exchangers adjacent to each other in the vertical direction during defrosting operation. With the drain plate that drains the molten water from the lower end of the plate fin, the molten water generated in the plate fin during the defrosting operation quickly reaches the bottom of each plate fin of the split heat exchanger at a short distance Thus, the water can be drained from the draining plate, and the heating time can be increased by shortening the defrosting operation time.

It is a schematic explanatory drawing which shows the time of heating operation of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a schematic explanatory drawing which shows the time of the defrost driving | operation of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is A arrow directional view of the outdoor heat exchanger part which shows the state which notched the water draining board of FIG. It is a schematic explanatory drawing which shows the outdoor unit of the air conditioning apparatus which concerns on Embodiment 2 of this invention. It is a schematic explanatory drawing which shows the outdoor unit of the air conditioning apparatus which concerns on Embodiment 3 of this invention. It is a schematic explanatory drawing which shows the outdoor unit of the air conditioning apparatus which concerns on Embodiment 4 of this invention. It is a schematic explanatory drawing which shows the outdoor unit of the air conditioning apparatus which concerns on Embodiment 5 of this invention. It is a schematic explanatory drawing which shows the time of heating operation of the air conditioning apparatus which concerns on Embodiment 6 of this invention. It is a schematic explanatory drawing which shows the outdoor unit of the air conditioning apparatus which concerns on Embodiment 7 of this invention. It is a schematic explanatory drawing which shows the outdoor unit of the air conditioning apparatus which concerns on Embodiment 8 of this invention. It is a schematic explanatory drawing which shows the time of heating operation of the air conditioning apparatus which concerns on Embodiment 9 of this invention. It is a schematic explanatory drawing which shows the case where the heating operation and defrosting operation of the air conditioning apparatus which concern on Embodiment 9 of this invention are performed simultaneously.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS.
Embodiment 1 relates to an outdoor unit of an air conditioner, FIG. 1 shows a heating operation of the air conditioner, FIG. 2 shows a defrosting operation, and FIG. 3 shows the draining plate of FIG. It is A arrow directional view of the outdoor heat exchanger part which shows the state partly notched.

1 to 3, reference numeral 1 denotes an air conditioner, which includes an outdoor unit 2 and an indoor unit 3.
The air conditioner 1 is a heat pump type capable of a cooling operation and a heating operation, and detects the frost formation of the outdoor heat exchanger 4 provided in the outdoor unit 2 during the heating operation and performs the defrosting operation.

The air conditioner 1 includes a compressor 11, a four-way switching valve 12, an indoor heat exchanger 13, a cooling / heating expansion valve 14, an outdoor heat exchanger 4, a four-way switching valve 12, a gas-liquid separator 15, and the compression. The machine 11 is connected by a refrigerant pipe 16 to form a refrigerant circulation circuit 17.
The outdoor unit 2 includes a number of vertically long plate-like fins 5 arranged in parallel at predetermined intervals, and a number of heat transfer tubes (not shown) arranged horizontally through the plate-like fins 5. The outdoor heat exchanger 4 that functions as an evaporator during the heating operation and the outdoor blower 6 that causes the outdoor air to flow through the outdoor heat exchanger 4 are provided.

The outdoor heat exchanger 4 divides a vertically long plate-like fin 5 into four in the horizontal direction to form four divided heat exchangers 7 each provided with a divided plate-like fin 51.
Between the split heat exchangers 7 and 7 adjacent to each other in the vertical direction, there is provided a draining plate 8 for draining molten water at the time of the defrosting operation from the lower end of the split plate fins 51.

The draining plate 8 is formed of three pieces including an upper first draining plate 8a, an intermediate second draining plate 8b, and a lower third draining plate 8c.
Each draining plate 8 a, 8 b, 8 c extends outward from the divided plate-like fin 51, and the draining plates 8 a, 8 b, 8 c located outside the divided plate-like fin 51 are arranged so that the end side is downward. Inclined to promote the draining of molten water.

The three draining plates 8a, 8b, and 8c are formed so that the end of the upper draining plate 8 is located farther from the divided plate-like fins 51 than the end of the lower draining plate 8. Thus, the molten water from the upper draining plate 8 is prevented from hitting the lower draining plate 8 and scattering.
In addition, the rising piece 8d is formed on the outside air inlet side of the divided plate-like fin 51 in each draining plate 8a, 8b, 8c, and the outside air of the lower divided plate-like fin 51 from the outside air inlet side of the upper divided plate-like fin 51. Prevents molten water from flowing down to the inlet side.

1 and 2, 41 is a refrigerant inlet side during heating operation and is a refrigerant outlet side during cooling operation and defrosting operation, and 42 is a refrigerant outlet side during heating operation, and during cooling operation and It is the 2nd header used as the refrigerant | coolant inlet side at the time of a defrost operation.
In FIG. 1 and FIG. 2, the first header 41 and the second header 42 are not divided for the sake of simplicity of illustration, but as shown in FIG. The divided first header 71 and the divided second header 72 are used.

In FIGS. 1 and 2, 18 is a control box provided in the outdoor unit 2, 19 is an indoor blower provided in the indoor unit 3, and 73 is a pair of side plates provided on both sides of each divided heat exchanger 7.
Next, based on FIG.1 and FIG.2, heating operation and defrost operation are demonstrated.

In the heating operation shown in FIG. 1, the refrigerant compressed by the compressor 11 enters the indoor heat exchanger 13 through the four-way switching valve 12, condenses in the indoor heat exchanger 13, and circulates by the indoor blower 19. Heats the room by exchanging heat.
The refrigerant condensed in the indoor heat exchanger 13 is depressurized by the cooling / heating common expansion valve 14 and evaporated from the first header 41 to the outdoor heat exchanger 4 including the four divided heat exchangers 7, and the second header 42, four-way A heating operation is performed by returning to the compressor 11 via the switching valve 12 and the gas-liquid separator 15.

As the outdoor condition is lower in temperature and humidity due to the continuation of the heating operation, the divided plate-like fins 51 of the outdoor heat exchanger 4 (four divided heat exchangers 7) are frosted to reduce the air volume and heat. The exchange performance is reduced and the heating capacity is reduced.
Therefore, frost formation is detected and the heating operation is switched to the defrosting operation shown in FIG.

In the defrosting operation, the four-way switching valve 12 is switched, the outdoor fan 6 and the indoor fan 19 are stopped, and the compressor 11 is operated.
The refrigerant compressed by the compressor 11 is condensed by the four divided heat exchangers 7 from the second header 42 via the four-way switching valve 12 and melts the frost of the divided plate-like fins 51 of the divided heat exchanger 7. It is.

The refrigerant condensed in the divided heat exchanger 7 is depressurized from the first header 41 by the cooling / heating expansion valve 14 and enters the indoor heat exchanger 13, and is evaporated by the indoor heat exchanger 13 to separate the four-way switching valve 12 and the gas-liquid separation. The defrosting operation is performed by returning to the compressor 11 via the vessel 15.
Then, the melted water of the divided plate-like fins 51 melted in this defrosting operation quickly falls downward from the divided plate-like fins 51 whose vertical direction has become shorter due to the division, and from the draining plate 8 to the base portion 21 of the outdoor unit 2. It will fall to the outside of the machine from the drainage hole.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG.
The second embodiment is obtained by changing the configuration of the draining plate in the first embodiment, and FIG. 4 is a schematic explanatory diagram of an outdoor unit in which the refrigerant circulation circuit is omitted.

Hereinafter, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted and the structure of the draining board different from Embodiment 1 is demonstrated.
In FIG. 4, a draining plate 81 for draining molten water at the time of the defrosting operation from the lower end of the split plate-like fins is provided between the split heat exchangers 7 and 7 adjacent to each other in the vertical direction.

The draining plate 81 is formed of three pieces, an upper first draining plate 81a, an intermediate second draining plate 81b, and a lower third draining plate 81c.
Each draining plate 81a, 81b, 81c is disposed so as to be inclined so that the inlet side of the outside air to the outdoor heat exchanger 4 is up and the outlet side is down, and extends outward from the divided plate fins. .

By disposing the draining plate 81 in an inclined manner in this manner, the melted water that has fallen onto the draining plate 81 from the lower end of the divided plate-like fins quickly flows down by the inclined draining plate 81 and promotes draining.
Further, as in the first embodiment, the three draining plates 81a, 81b, 81c are positions where the end of the upper draining plate 8 is farther from the divided plate fins than the end of the lower draining plate 8 is. The molten water from the upper draining plate 8 is prevented from splashing on the lower draining plate 8 and scattering.

In addition, a rising piece 81d is formed on the outside air inlet side of the divided plate-like fin in each draining plate 81a, 81b, 81c, and from the outside air inlet side of the upper divided plate-like fin to the outside air inlet side of the lower divided plate-like fin. Prevents molten water from falling down.

Embodiment 3 FIG.
Next, Embodiment 3 of the present invention will be described with reference to FIG.
In the third embodiment, the configuration of the draining plate in the first embodiment is changed, and FIG. 5 is a schematic explanatory view of an outdoor unit in which the refrigerant circulation circuit is omitted.

Hereinafter, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted and the structure of the draining board different from Embodiment 1 is demonstrated.
In FIG. 5, a draining plate 82 is provided between the split heat exchangers 7 and 7 adjacent to each other in the vertical direction to drain the molten water during the defrosting operation directly from the lower end of the split plate fins to the outside of the machine.

The draining plate 82 is formed of three plates, an upper first draining plate 82a, an intermediate second draining plate 82b, and a lower third draining plate 82c.
Each draining plate 82a, 82b, 82c extends outside the machine outside the divided plate-like fins, and the draining plates 82a, 82c, 82c located outside the machine outside the divided plate-like fins are on the end side. It is inclined so as to be downward, facilitating draining of molten water.

Further, the three draining plates 82a, 82b, 82c are formed so that the end of the upper draining plate 8 is farther away from the divided plate fins than the end of the lower draining plate 8 and extends to the outside of the machine. Thus, the molten water from the upper draining plate 8 is prevented from hitting the lower draining plate 8 and scattering.
In addition, the rising piece 82d is formed on the outside air outlet side of the divided plate-like fin in each draining plate 82a, 82b, 82c, and the outside air outlet side of the lower divided plate-like fin is changed from the outside air outlet side to the lower divided plate-like fin. Prevents molten water from falling down.

In the third embodiment, the molten water of the upper three divided heat exchangers 7 is directly drained outside the apparatus, and the molten water of the lower divided heat exchanger 7 is discharged from the base portion 21 of the outdoor unit 2. It drains out of the machine through the drain hole.
Accordingly, the molten water may freeze on the base portion 21 before being drained from the drain hole of the base portion 21 of the outdoor unit 2 to the outside, and means for re-melting the base portion 21 by installing an electric heater or the like. However, in this embodiment, the means for such remelting can be reduced.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIG.
In the fourth embodiment, the configuration is such that a draining plate is also provided at the lower end of the divided plate-like fins of one lower divided heat exchanger in the third embodiment.

Hereinafter, configurations similar to those of the third embodiment are denoted by the same reference numerals, description thereof is omitted, and configurations different from those of the third embodiment are described.
In FIG. 6, molten water at the time of defrosting operation is provided at the lower end of the divided plate-like fins between the upper and lower adjacent divided heat exchangers 7 and 7 and the lower end of the divided plate-like fins of the lowermost divided heat exchanger 7. A draining plate 83 is provided for draining directly out of the machine.

The draining plate 83 is formed of four sheets of a first draining plate 83a, a second draining plate 83b, a third draining plate 83c, and a fourth draining plate 83d in order from the top.
Each draining plate 83a, 83b, 83c, 83d extends outside the machine outside the divided plate fins, and the draining plates 83a, 83b, 83c, 83d located outside the machine outside the divided plate fins. Is inclined so that the end side is downward, and promotes draining of molten water.

Further, the four draining plates 83a, 83b, 83c, and 83d are arranged so that the end of the upper draining plate 8 is farther away from the divided plate-like fins than the end of the lower draining plate 8 and extends to the outside of the machine. In this way, the molten water from the upper draining plate 8 is prevented from hitting the lower draining plate 8 and scattering.
In addition, the rising piece 83e is formed on the outside air outlet side of the divided plate-like fin in each draining plate 83a, 83b, 83c, 83d, and the outside air outlet of the lower divided plate-like fin from the outside air outlet side of the upper divided plate-like fin The molten water is prevented from falling to the side.

In the fourth embodiment, the molten water of the outdoor heat exchanger 2 including the four divided heat exchangers 7 is directly drained outside the apparatus.
Therefore, there is no possibility that the melted water freezes on the base part 21 before the molten water is drained from the drain hole of the base part 21 of the outdoor unit 2 to the outside of the machine, and a means for remelting can be eliminated.

Embodiment 5. FIG.
Next, a fifth embodiment of the present invention will be described with reference to FIG.
In the fifth embodiment, the lower one split heat exchanger in the fourth embodiment is removed to form three split heat exchangers, and the two lower draining plates are removed to start up from the base portion. In addition, the configuration is changed to a configuration provided with a draining and combined plate-like portion.

Hereinafter, configurations similar to those of the fourth embodiment are denoted by the same reference numerals, description thereof is omitted, and configurations different from those of the fourth embodiment are described.
In FIG. 7, a draining plate 84 is provided between the split heat exchangers 7 and 7 adjacent to each other in the vertical direction to drain the molten water during the defrosting operation directly from the lower end of the split plate fins to the outside of the machine.

The draining plate 84 is formed of two plates, an upper first draining plate 84a and a lower second draining plate 84b.
Each draining plate 84a, 84b extends outside the machine outside the divided plate-like fins, and the draining plates 84a, 84b located outside the machine outside the divided plate-like fins are on the end side downward. Inclined to promote the draining of molten water.

In addition, the two draining plates 84a and 84b are formed so that the end of the upper draining plate 84a is farther away from the divided plate fins than the end of the lower draining plate 84b and extends to the outside of the machine. The molten water from the upper draining plate 84a is prevented from hitting the lower draining plate 84b and scattering.
In addition, the rising piece 84c is formed on the outside air outlet side of the divided plate-like fins in each draining plate 84a, 84b, and the molten water is transferred from the outside air outlet side of the upper divided plate-like fins to the outside air outlet side of the lower divided plate-like fins. Is prevented from falling through.

Further, the draining and combining plate-like portion 22 having an inclined surface that descends from the inside to the outside is brought up from the base portion 21 so as to contact the lower end corner portion on the inner side of the lowermost divided heat exchanger 7.
In the fifth embodiment, the molten water of the outdoor heat exchanger 4 including the three divided heat exchangers 7 is directly drained outside the apparatus.

Accordingly, in the fifth embodiment, similarly to the fourth embodiment, there is no possibility that the molten water freezes on the base portion 21 before being drained from the drain hole of the base portion 21 of the outdoor unit 2 to the outside of the device. A means for remelting can be eliminated.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described with reference to FIG.
In the sixth embodiment, the configuration of the outdoor unit and the indoor unit in the first embodiment is changed, a part of the components of the refrigerant circulation circuit is arranged from the outdoor unit to the indoor unit, and the configuration of the outdoor heat exchanger Is a change.

Hereinafter, configurations similar to those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and configurations different from those in the first embodiment will be described.
In FIG. 8, an air conditioner 1a includes an outdoor unit 2a including an outdoor heat exchanger 4a and an outdoor fan 6, a compressor 11, a four-way switching valve 12, an indoor heat exchanger 13, a cooling / heating common expansion valve 14, and an outdoor unit. The heat exchanger 4, the gas-liquid separator 15, and the indoor unit 3a incorporating the indoor blower 19 are provided.

The air conditioner 1a is a heat pump type capable of cooling operation and heating operation, and performs defrosting operation by detecting the frost formation of the outdoor heat exchanger 4 provided in the outdoor unit 2a during the heating operation.
Further, the air conditioner 1a includes the compressor 11, the four-way switching valve 12, the indoor heat exchanger 13, the cooling / heating expansion valve 14, the outdoor heat exchanger 4, the four-way switching valve 12, as in the first embodiment. A gas-liquid separator 15 and the compressor 11 are connected by a refrigerant pipe 16 to form a refrigerant circulation circuit 17.

The outdoor unit 2a has a number of vertically long plate-like fins arranged in parallel at predetermined intervals, and a number of heat transfer tubes arranged horizontally through the plate-like fins, and serves as an evaporator during heating operation. A pair of functioning outdoor heat exchangers 4a is incorporated.
Each of the outdoor heat exchangers 4a is arranged so as to be inclined so that the upper side is located on the outer surface side and the lower side is located on the inner side, and the plate-like fins are divided in the orthogonal direction and provided with divided plate-like fins, respectively. The divided heat exchanger 7 is formed.

Moreover, each outdoor heat exchanger 4a is arrange | positioned between the division | segmentation heat exchangers 7 and 7 adjacent diagonally up and down, and the draining board 85 which drains the molten water at the time of a defrost operation from the lower end of a division | segmentation plate-like fin. I have.
The draining plate 85 of each outdoor heat exchanger 4a is formed of three sheets, an upper first draining plate 85a, an intermediate second draining plate 85b, and a lower third draining plate 85c.

Each draining plate 85a, 85b, 85c extends outward from the divided plate fin.
Moreover, since each outdoor heat exchanger 4a is inclined so that the upper side is located on the outer surface side and the lower side is located on the inner side, the end portions of the three draining plates 85a, 85b, and 85c are also on the lower side. It is inclined to promote draining of molten water.

Further, along with the inclination of each outdoor heat exchanger 4a, the end portions of the three draining plates 85a, 85b, 85c are formed in the same shape, but the upper draining plate 85 is lower than the lower draining plate 85. It is located outside rather than one.
Therefore, the molten water from the upper draining plate 8 is prevented from hitting the lower draining plate 8 and scattering.

In FIG. 8, the control box 18 is disposed in the indoor unit 3 a that contains many control components such as the compressor 11.
The configuration excluding the above description is self-evident, without needing to be described with reference to the first to fifth embodiments.

Embodiment 7 FIG.
Next, a seventh embodiment of the present invention will be described with reference to FIG.
In the seventh embodiment, the side plate provided for each divided heat exchanger in the first embodiment is provided in common to the four divided heat exchangers, and the four divided heat exchangers are integrated. is there.

FIG. 9 is a diagram corresponding to FIG. 3, and includes an outdoor heat exchanger 4 in which a pair of common side plates 43 is provided for four of the divided heat exchangers 7 and the four divided heat exchangers 7 are integrated. It was.
And since the division | segmentation heat exchanger 7 was integrated, the division | segmentation 1st header 71 and the division | segmentation 2nd header 72 in FIG. 3 can also be integrated, and it can be set as the common 1st header 41 and 2nd header 42. FIG.

Therefore, in the seventh embodiment, the outdoor heat exchanger 4 can be integrated by the pair of side plates 43 while the four divided heat exchangers 7 are used, the number of parts can be reduced, and the outdoor heat exchanger 4 can be manufactured. Becomes easy.
In the seventh embodiment, the configuration of the side plate 43, the first header 41, and the second header 42 is changed from the first embodiment, and the configuration excluding these is the same as the first embodiment. is there.

In FIG. 9, the draining plate 86 is represented by changing the reference numerals 86 a, 86 b, 86 c, but the configuration is the same as that of the first embodiment.

Embodiment 8 FIG.
Next, an eighth embodiment of the present invention will be described with reference to FIG.
In the eighth embodiment, the molten water can be drained in a short time by the configuration of the split heat exchanger, without providing the draining plates arranged between the upper and lower adjacent split heat exchangers in the first embodiment. It was made to do.

In FIG. 10, in each divided heat exchanger 7, the upper ends of the divided plate fins are closed by an upper plate (not shown), and the lower ends are opened.
The upper divided heat exchanger 7 is on the outer surface side of the outdoor unit 2, and the lower divided heat exchanger 7 is on the inner side of the outdoor unit 2, and the lower end corner 74 on the inner side of the upper divided heat exchanger 7. And the outer surface side upper end corner 75 of the lower divided heat exchanger 7 are arranged at positions close to each other.

Therefore, in the eighth embodiment, due to the configuration of each divided heat exchanger 7, it is possible to drain the molten water in a short time without providing a draining plate.
It should be noted that outside air does not bypass the split heat exchanger 7 between the lower end corner portion 74 on the inner side of the upper split heat exchanger 7 and the upper end corner portion 75 on the outer surface side of the lower split heat exchanger 7. It is desirable to provide an appropriately shaped bypass prevention member (not shown).

Embodiment 9 FIG.
Next, a ninth embodiment of the present invention will be described with reference to FIGS.
In the ninth embodiment, the refrigerant circulation circuit in the fourth embodiment (see FIGS. 1 and 2 of the first embodiment) is divided into two systems, and when the defrosting operation is performed in one refrigerant circulation circuit, the other refrigerant circulation is performed. Heating operation is performed in a circuit so that the heating capacity does not become zero.

FIG. 11 shows a case where both the refrigerant circulation circuits are in the heating operation, and FIG. 12 shows a case where the upper refrigerant circulation circuit is in the defrosting operation and the lower refrigerant circulation circuit is in the heating operation.
11 and 12, the outdoor unit 2 includes an outdoor heat exchanger 4 including four divided heat exchangers 7 and an outdoor blower 6 that circulates outside air to the outdoor heat exchanger 4.

The upper two divided heat exchangers 7 in the outdoor heat exchanger 4 are interposed in one first refrigerant circulation circuit 17a, and the lower two divided heat exchangers 7 in the outdoor heat exchanger 4 are connected to the other first. Two refrigerant circulation circuits 17b are interposed.
In addition, similarly to FIG. 6, the molten water at the time of the defrosting operation is divided between the divided heat exchangers 7, 7 adjacent to each other on the upper and lower sides and the lower end of the divided plate-like fins of the lower divided heat exchanger 7. A draining plate 83 that drains directly from the lower end of the fin to the outside of the machine is provided.

The outdoor unit 2 includes two compressors 11, a four-way switching valve 12, an indoor heat exchanger 13, a gas-liquid separator 15, a first header 41, and a second header 42.
The outdoor unit 2 includes one outdoor blower 6 and one control box 19.

The indoor unit 3 includes two indoor heat exchangers 13 and two cooling / heating expansion valves 14, and one indoor blower 19.
In the heating operation, as shown in FIG. 11, the refrigerant is circulated through the two refrigerant circulation circuits 17a and 17b as indicated by arrows, and each divided heat exchanger 7 is an evaporator, and each indoor heat exchanger 13 is It functions as a condenser.

In the defrosting operation, when the defrosting operation is performed in one refrigerant circulation circuit, the heating operation is performed in the other refrigerant circulation circuit, and the heating capacity is controlled not to become zero.
For example, as shown by an arrow in FIG. 12, the defrosting operation is performed in the first refrigerant circulation circuit 17a, and the heating operation is performed in the second refrigerant circulation circuit 17b. In this case, the outdoor fan 6 and the indoor fan 19 are operated. Has continued.

In particular, even if the upper two divided heat exchangers 7 provided in the first refrigerant circulation circuit 17a are defrosted, the two divided heat exchanges in which the molten water is provided in the lower second refrigerant circulation circuit 17b. There is no fear of flowing down into the vessel 7, and it is possible to prevent icing in the lower divided heat exchanger 7.

In the above-described first to ninth embodiments, the example in which the defrosting operation is performed with the refrigerant circulation circuit in the reverse cycle to that in the heating operation is shown. However, the hot gas bypass system, the electric heater An appropriate defrosting operation method such as an external heat source method can be adopted.
Moreover, although the example which divided | segmented the outdoor heat exchanger into 4 groups, 3 groups, and 8 groups was shown in the above Embodiment 1- Embodiment 9, what is necessary is just to divide into plurality.

In the above seventh embodiment, four split heat exchangers are integrated by a pair of side plates, but the present invention is also applicable to the first to sixth embodiments and the ninth embodiment except for the eighth embodiment. can do.
In Embodiment 9 described above, the refrigerant circulation circuit has two systems, and the defrosting operation of the split heat exchanger is not performed at the same time in the two refrigerant circulation circuits, but in Embodiments 1 to 8, Can also be applied.

  In Embodiments 1 to 9 described above, the header is provided at the entrance / exit of the outdoor heat exchanger, but a refrigerant distributor can be used instead of the header.

DESCRIPTION OF SYMBOLS 1, 1a Air conditioning apparatus 2, 2a Outdoor unit 4, 4a Outdoor heat exchanger 43 Side plate 5 Plate-like fin 51 Division plate-like fin 6 Outdoor blower 7 Division heat exchanger 74 Inner side lower end corner 75 Outer surface side upper end corner 8, 81, 82, 83, 84, 85, 86 Draining plates 17, 17a, 17b Refrigerant circulation circuit

Claims (9)

Outdoor heat functioning as an evaporator during heating operation, having a number of vertically long plate-like fins arranged in parallel at predetermined intervals and a number of heat transfer tubes arranged horizontally through the plate-like fins In an outdoor unit of an air conditioner including an exchanger and an outdoor fan that circulates outside air to the outdoor heat exchanger,
A plurality of divided heat exchangers formed by dividing the plate fin in the horizontal direction;
An outdoor unit for an air conditioner, comprising: a draining plate that is disposed between the split heat exchangers adjacent to each other on the top and bottom, and drains the molten water at the time of defrosting operation from the lower ends of the split plate fins. .   2. The outdoor unit of an air conditioner according to claim 1, wherein a draining plate is inclined from one side to the other side between an inlet side and an outlet side of outside air to the outdoor heat exchanger. .   The draining plate extends outward of the divided plate-like fins, and the draining plate positioned outward of the divided plate-like fins is inclined so that the end side is downward. Or the outdoor unit of the air conditioning apparatus of 2.   The plurality of upper and lower draining plates are formed such that the end of the upper draining plate is positioned farther from the divided plate fin than the end of the lower draining plate. Air conditioner outdoor unit.   The draining plate is formed so that the end of the draining plate is located outside the outdoor unit, and extends outside the split plate-like fins and outside the outdoor unit. Item 5. An outdoor unit for an air conditioner according to Item 3 or 4. Outdoor heat functioning as an evaporator during heating operation, having a number of vertically long plate-like fins arranged in parallel at predetermined intervals and a number of heat transfer tubes arranged horizontally through the plate-like fins An air conditioner comprising: an exchanger; and an outdoor fan that circulates outside air to the outdoor heat exchanger, wherein the outdoor heat exchanger is disposed so as to be inclined such that the upper side is positioned on the outer surface side and the lower side is positioned on the inner side. In outdoor unit,
A plurality of divided heat exchangers formed by dividing the plate-like fins in the orthogonal direction;
An outdoor of an air conditioner provided with a draining plate that is disposed between the divided heat exchangers diagonally adjacent to each other and drains molten water at the time of defrosting operation from the lower ends of the divided plate-like fins. Machine.   The outdoor unit for an air conditioner according to any one of claims 1 to 6, wherein the outdoor heat exchanger is integrated by sharing the side plates of the plurality of divided heat exchangers with one side plate. Outdoor heat functioning as an evaporator during heating operation, having a number of vertically long plate-like fins arranged in parallel at predetermined intervals and a number of heat transfer tubes arranged horizontally through the plate-like fins In an outdoor unit of an air conditioner including an exchanger and an outdoor fan that circulates outside air to the outdoor heat exchanger,
Dividing the plate fins in the horizontal direction to form a plurality of divided heat exchangers,
In each divided heat exchanger, the upper ends of the divided plate fins are closed by the upper plate, and the lower ends are opened,
The upper split heat exchanger is on the outer surface side of the outdoor unit, and the lower split heat exchanger is on the inner side of the outdoor unit, and the lower end corner on the inner side of the upper split heat exchanger and the lower split heat exchanger An outdoor unit for an air conditioner, wherein the outdoor unit is arranged at a position close to an upper end corner on the outer surface side.   A plurality of divided heat exchangers are interposed in a plurality of refrigerant circulation circuits capable of circulating the refrigerant independently of each other, and the defrosting operation of the divided heat exchangers is shifted for each refrigerant circulation circuit. The outdoor unit of the air conditioning apparatus according to any one of claims 1 to 8, wherein the outdoor unit is an air conditioner.

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