JP2008096075A - Engine-driven type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine-driven type air conditioner capable of preventing reduction of an amount of engine oil storable in a pan by removing dew water dripping into the pan of engine oil. <P>SOLUTION: The engine-driven type air conditioner 1 is provided with gas engine-driven type compressors 13A, 13B on a bottom plate 37 of a casing, a suction pipe 17 and discharge pipe 21 for the compressors 13A, 13B, and pan parts 41, 43 receiving the engine oil leaking from a gas engine 15 on the bottom plate 37 substantially right below the gas engine 15. Heating means 65 for heating the engine oil such that dew water formed on a surface of the suction pipe 17 and dripping into the engine oil can be evaporated, is provided in the pan parts 41, 43. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an engine-driven air conditioner.

Conventionally, a compressor driven by a gas engine is provided on a bottom plate of a casing, and a suction pipe and a discharge pipe of the compressor, and engine oil leaking from the gas engine is received on a bottom plate almost directly below the gas engine. An engine-driven air conditioner provided with a saucer is known.
In this type of engine-driven air conditioner, engine oil in a gas engine arranged in an outdoor unit or refrigeration oil in a compressor may leak out. In particular, the gas engine stores a large amount of engine oil in order to extend the regular maintenance interval, so that even if the engine oil decreases due to leakage, the minimum amount of oil can be secured until the next periodic maintenance. It is configured. For this reason, when the engine oil in the gas engine flows out of the outdoor unit, the amount of oil flowing out becomes large. In order to prevent such a situation, an engine-driven air conditioner provided with a tray that receives and stores leaked engine oil has been proposed (see, for example, Patent Document 1).
JP 2004-286241 A

However, a refrigerant pipe is disposed in the outdoor unit of the air conditioner, and dew condensation water is generated at a portion where the surface temperature of the refrigerant pipe is lower than the outside air temperature when low-temperature refrigerant flows. If this condensed water is dropped and stored in the tray, the amount of engine oil that can be stored in the tray is reduced by the amount of stored condensed water, which is sufficient when a situation occurs in which engine oil flows out. The amount of engine oil cannot be stored. In particular, as the operating rate of the engine-driven air conditioner increases, such as in summer or winter, a larger amount of condensed water drops on the tray and is stored.
The present invention has been made in view of the above-described circumstances, and provides an engine-driven air conditioner capable of preventing the amount of engine oil that can be stored in a tray from being reduced due to the storage of condensed water. The purpose is to do.

The present invention includes a gas engine driven compressor on a bottom plate of a casing, and a suction pipe and a discharge pipe of the compressor, and engine oil leaking from the gas engine on a bottom plate almost directly below the gas engine In the engine-driven air conditioner provided with a receiving tray portion for receiving, a heating means for heating the engine oil to evaporate condensed water generated on the surface of the suction pipe and dripped into the engine oil. It is provided.
According to this configuration, by providing a heating means for evaporating the condensed water in the tray, the engine oil and the condensed water dripped on the tray of the engine oil are heated, the condensed water is evaporated and removed, and the condensed water is stored. Therefore, it is possible to prevent the amount of engine oil that can be stored in the tray from decreasing.

In this case, the heating means may be constituted by a part of a discharge pipe of the compressor. A part of the discharge pipe may be arranged in a meandering manner in the tray part.
According to these configurations, by using a discharge pipe connected to the compressor in the vicinity of the saucer part and through which a high-temperature refrigerant flows, it is easy to guide and arrange a part of the discharge pipe in the saucer part. There is no need to additionally provide a heat source as a heating means.

The heating means may be composed of an oil separator disposed in the discharge pipe. The oil separator may be arranged upright in the tray portion.
According to these structures, it is not necessary to newly provide a heat source as a heating means by using an oil separator through which a high-temperature refrigerant flows.

  According to the present invention, by providing a heating means for evaporating the condensed water in the tray, the engine oil and the condensed water dropped on the tray of the engine oil are heated to evaporate and remove the condensed water. It is possible to prevent a reduction in the amount of engine oil that can be stored in the tray due to storage.

Hereinafter, an engine-driven air conditioner according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration of an engine-driven air conditioner in the present embodiment. The engine-driven air conditioner 1 according to the present embodiment is a separate heat pump air conditioner that includes an outdoor unit 3 and an indoor unit 5. An outdoor refrigerant pipe 7 of the outdoor unit 3 and an indoor refrigerant pipe 9 of the indoor unit 5 are connected via a connecting pipe 11 to constitute a refrigerant circuit 12.

  The outdoor unit 3 is installed outside, and two compressors 13 </ b> A and 13 </ b> B are connected in parallel to the outdoor refrigerant pipe 7. These compressors 13A and 13B are driven by one gas engine 15 (see FIG. 2). The compressors 13 </ b> A and 13 </ b> B have a suction pipe 17 connected to the suction side, and the suction pipe 17 is connected to an accumulator 19. On the other hand, a discharge pipe 21 is connected to the discharge side of the compressors 13A and 13B1, and an oil separator 23 for separating the refrigerant and the oil component is disposed in the middle of the discharge pipe 21. The discharge pipe 21 is connected to a four-way valve 25, and an outdoor heat exchanger 27 and an electric expansion valve 29 are sequentially connected to the four-way valve 25. The outdoor unit 3 is provided with an outdoor fan 31 that blows air toward the outdoor heat exchanger 27.

  The indoor unit 5 is installed in a conditioned room, and is provided with an indoor heat exchanger 33 between the air inlet and the air outlet, and an indoor fan that conducts air from the air inlet to the air outlet. 35.

  The engine-driven air conditioner 1 is configured to switch between the cooling operation and the heating operation by switching the flow of the refrigerant flowing through the refrigerant circuit 12 by switching the four-way valve 25. During the cooling operation, the refrigerant flows in the direction of the solid line arrow shown in the figure, and during the heating operation, the refrigerant flows in the direction of the wavy line arrow.

FIG. 2 is a perspective view showing a machine room of the outdoor unit.
The outdoor unit 3 includes a rectangular housing (not shown), and the inside is partitioned into an upper heat exchange chamber and a lower machine chamber by a drain pan (not shown). An outdoor heat exchanger 27 is disposed on the outer periphery of the upper heat exchange chamber, and an outdoor fan 31 is disposed on the upper portion of the heat exchange chamber.
In the lower machine room, the gas engine 15, the compressors 13A and 13B, the accumulator 19 and the like are arranged on the bottom plate 37 of the casing.

The bottom plate 37 is formed in a thick rectangular box shape by sheet metal, and three rectangular openings are formed on the upper surface thereof, and each of the openings has rectangular receiving portions 39, 41 corresponding to the openings, and 43 is fitted.
On the right side of the figure on the bottom plate 37, a dew condensation water tray part 39 for receiving dew condensation water dripped from above is provided. The dew condensation water receiving tray 39 is formed with a drain port 45 (see FIG. 4) for draining the dew condensation water received to the outside.
In the center of the figure on the bottom plate 37, a first saucer 41 for receiving oil and condensed water dripped from above is provided, and the saucer provided on the left side of the figure on the bottom plate 37 is similarly A second tray part 43 for receiving oil and condensed water dripped from above is provided.
Between the first saucer portion 41 and the second saucer portion 43, a beam portion 44 extending in the vertical direction in the figure is bridged on the floor plate 37, and on this beam portion 44, a rectangular shape is formed. A first guide plate 47 is provided. The first guide plate 47 is formed with wall portions on two sides that do not correspond to the first saucer portion 41 and the second saucer portion 43, and guides the liquid dripped from above so that the first saucer portion 41 and the second saucer portion are provided. It is provided so as to be dropped on the portion 43. Further, a rectangular second guide plate 49 is provided between the first tray part 41 and the condensed water tray part 39. The second guide plate 49 has walls formed on three sides that do not correspond to the first tray part 41 and is provided so as to guide the liquid dropped from above and drop it on the first tray part 41.

  In the center on the bottom plate 37, four struts 51 that form four corners at intervals are provided so as to straddle the first tray portion 41 and the first guide plate 47. These four columns 51 support the gas engine 15 from below via stays 53 provided at the four corners of the gas engine 15. That is, the first saucer portion 41 and the first guide plate 47 are provided substantially directly below the gas engine 15. The gas engine 15 includes an oil pan 55 that stores a large amount of oil at a lower portion thereof, and the two compressors 13A and 13B described above are attached to the right side of the oil pan 55 in the drawing. These two compressors 13A and 13B are interlocked with a pulley 56 attached to a crank (not shown) of the gas engine 15 via a belt 52 and pulleys 54A and 54B.

  On the right side of the compressors 13 </ b> A and 13 </ b> B, an accumulator 19 is disposed upright on the dew condensation water tray unit 39. The suction pipe 17 that connects the accumulator 19 and the compressors 13A and 13B has an outer periphery covered with a heat insulating material. The suction pipe 17 extends from the upper side of the accumulator 19 to the left in the figure, and is bent downward above the compressors 13A and 13B. As shown in FIG. 3, the suction pipe 17 is branched into two branch pipes 57A and 57B in the vicinity of the compressors 13A and 13B. The branch pipe 57A is connected to a suction port 59A formed at the upper right side of the compressor 13A in the drawing, and similarly, the branch pipe 57B is connected to a suction port 59B formed at the upper right side of the compressor 13B in the drawing. ing.

  A discharge port 61A for discharging the refrigerant compressed in the compressor 13A is formed in the upper left part of the compressor 13A in the drawing. The discharge pipe 21 connected to the discharge port 61A includes two junction pipes 63A and 63B, a heating pipe (heating means) 65, and a communication pipe 67. A junction pipe 63A is connected to the discharge port 61A. Similarly, a discharge port 61B for discharging the refrigerant compressed in the compressor 13B is formed in the upper left part of the compressor 13B in the figure, and a junction pipe 63B is connected to the discharge port 61B. ing.

The merge pipe 63A and the merge pipe 63B are connected to one heating pipe 65 and merge. The heating pipe 65 is bent downward on the upper side of the compressors 13A and 13B and extends into the first saucer portion 41 as shown in FIG. The heating pipe 65 is a bare pipe whose outer periphery is not covered with a heat insulating material, and is arranged meandering on the bottom surface in the first tray part 41. The heating tube 65 extends through the side of the first guide plate 47 to the second saucer portion 43 and, like the first saucer portion 41, is arranged meandering on the bottom surface in the second saucer portion 43. Has been.
The oil separator 23 described above is disposed between the heating pipe 65 and the communication pipe 67 of the discharge pipe 21. The oil separator 23 is arranged upright on the bottom surface in the second saucer portion 43, and the heating pipe 65 arranged in the second saucer portion 43 is connected to the inflow portion 69 of the oil separator 23. ing. A connecting pipe 67 whose outer periphery is covered with a heat insulating material is connected to the outflow portion 71 of the oil separator 23, and this connecting pipe 67 is connected to the four-way valve 25.

FIG. 4 is a system diagram showing a means for removing condensed water.
The engine oil of the gas engine 15 and the oil such as the refrigeration oil of the compressors 13A and 13B constitute the crank of the gas engine 15, the bearings of the rotary shafts of the compressors 13A and 13B, the gas engine 15 and the compressors 13A and 13B. There is a case where leakage occurs from the joint portion between the members, and the leaked oil drops downward. The outdoor unit 3 includes a first saucer portion 41, a second saucer portion 43, a first guide plate 47 (see FIG. 2), and a first guide plate, just below a device that uses oil such as the gas engine 15 and the compressors 13A and 13B. A two-guide plate 49 (see FIG. 2) is provided on the bottom plate 37 (see FIG. 2). The dropped oil is received by any one of the first saucer portion 41, the second saucer portion 43, the first guide plate 47, and the second guide plate 49, and stored in the first saucer portion 41 or the second saucer portion 43. Is done. At this time, when the first guide plate 47 receives the dropped oil, the first guide plate 47 guides the oil to the first tray portion 41 or the second tray portion 43. On the other hand, when the oil is dropped and received by the second guide plate 49, the second guide plate 49 guides the oil into the first tray part 41.

  When the outdoor unit 3 operates, the low-temperature refrigerant cooled by the refrigerant circuit 12 is supplied to the accumulator 19 from the four-way valve 25 (see FIG. 1). The low-temperature refrigerant supplied to the accumulator 19 flows through the suction pipe 17 to the compressors 13A and 13B. The accumulator 19, the portion of the suction pipe 17 that is not covered with the heat insulating material, and the surfaces of the suction ports 59A and 59B of the compressors 13A and 13B are cooled to a temperature lower than the outside air by the low-temperature refrigerant flowing inside, and the condensed water Will occur. Condensed water generated between the accumulator 19 and the four-way valve 25 is dropped and drained from the drain 45 to the outside. On the other hand, the suction pipe 17 is connected to the compressors 13A and 13B above the first tray part 41, and the dew condensation water generated on the surfaces of the suction pipe 17 and the compressors 13A and 13B is transferred to the first tray part. It is dripped in 41 or the second saucer part 43.

  The heating pipe 65 and the oil separator 23 are heated (about 80 to 100 ° C.) by the refrigerant that has been compressed by the compressors 13 </ b> A and 13 </ b> B flowing into the inside and heated (about 80 to 100 ° C.). The oil and condensed water dripped at the part 43 are heated, and the condensed water is evaporated and removed.

In the present embodiment, the heating pipe 65 meandered on the bottom surfaces in the first saucer portion 41 and the second saucer portion 43 is disposed, and the oil separator 23 is erected on the bottom surface in the second saucer portion 43. By arranging, the oil and condensed water dripped in the 1st saucer part 41 and the 2nd saucer part 43 are heated, dew condensation water is evaporated and removed, and the 1st saucer part 41 is stored by dew condensation water storage. And it can prevent that the quantity of the oil which can be stored in the 2nd saucer part 43 will reduce. At this time, by using a part of the discharge pipe 21 through which the high-temperature refrigerant flows and the oil separator 23, there is no need to newly provide a heat source as a heating means. In particular, the discharge pipe 21 includes the first tray portion 41. And since it is connected to the compressors 13 </ b> A and 13 </ b> B in the vicinity of the second tray part 43, it is easy to guide and arrange the first tray part 41 and the second tray part 43.
Moreover, in this embodiment, since the 1st saucer part 41 and the 2nd saucer part 43 are provided on both sides of the beam part 44 spanned over the floor board 37, the rigidity of the floor board 37 can be made high.

As mentioned above, although this invention was demonstrated based on one embodiment, it is clear that this invention is not limited to this.
In the above embodiment, the oil separator 23 is arranged on the downstream side of the heating pipe 65, but the present invention is not limited to this, and the oil separator 23 may be arranged on the upstream side of the heating pipe 65.
In the above embodiment, the connecting pipe 67 whose outer periphery is covered with a heat insulating material is connected between the oil separator 23 and the four-way valve 25, but the present invention is not limited to this, and the oil separator 23 and the four-way valve 25 are four-way. Like the heating pipe 65, a pipe whose outer periphery is not covered with a heat insulating material is connected between the valve 25, and this pipe is arranged meandering on the bottom surfaces of the first and second saucer portions 41 and 43. May be.
Furthermore, in the said embodiment, although the saucer by which the heating tube 65 is arrange | positioned is divided | segmented and provided in the two saucers of the 1st saucer part 41 and the 2nd saucer part 43, it is not limited to this, One large saucer may be provided.
Furthermore, in the above-described embodiment, the heating pipe 65 and the oil separator 23 are used as heating means. However, the present invention is not limited to this, and any gas engine radiator or heater can be used as long as the condensed water dripping on the tray can be evaporated. Other heat sources such as may be used as the heating means.
Moreover, in the said embodiment, although the heating means is provided in the 1st saucer part 41 and the 2nd saucer part 43, it is not limited to this, A heating means is provided in the 1st guide plate 47 or the 2nd guide plate 49. May be.

It is a figure which shows schematic structure of the engine drive type air conditioner which concerns on embodiment of this invention. It is a perspective view which shows the machine room of an outdoor unit. It is a perspective view which shows a compressor. It is a systematic diagram which shows the means to remove dew condensation water.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine drive type air conditioner 13A, 13B Compressor 15 Gas engine 17 Suction pipe 21 Discharge pipe 23 Oil separator 37 Bottom plate 41 First saucer part 43 Second saucer part 65 Heating means

Claims (5)

A gas engine-driven compressor on the bottom plate of the housing, a suction pipe and a discharge pipe of the compressor, and a saucer portion for receiving engine oil leaking from the gas engine on a bottom plate almost directly below the gas engine In an engine-driven air conditioner equipped with
An engine-driven air conditioner provided with heating means for heating the engine oil to evaporate condensed water generated on the surface of the suction pipe and dripped into the engine oil.   The engine-driven air conditioner according to claim 1, wherein the heating means is configured by a part of a discharge pipe of the compressor.   The engine-driven air conditioner according to claim 2, wherein a part of the discharge pipe is meanderingly arranged in the tray part.   The engine-driven air conditioner according to any one of claims 1 to 3, wherein the heating means includes an oil separator disposed in the discharge pipe.   The engine-driven air conditioner according to claim 4, wherein the oil separator is disposed upright in the tray portion.

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