JP2020204425A - Outdoor unit of gas engine driving type air conditioner - Google Patents

Abstract

To provide an outdoor unit of a gas engine driving type air conditioner which achieves reduction of the number of components in an engine room.SOLUTION: An outdoor unit 1 of a gas engine driving type air conditioner includes: a cylindrical member 51 having a cylindrical body part 511 which extends in a vertical direction in a heat exchange room CR and a bottom lid part 512 which closes a lower end of the body part 511 and opening at an upper end of the body part 511; a partition wall 52 which is provided within the body part 511 and partitions an internal space of the body part 511 into an upper space US and a lower space LS; a first exhaust pipe 53 which extends from the outer side of the body part 511, penetrates through the bottom lid part 512, and reaches the lower space LS and in which one end thereof is open to the partition wall 52 and the other end is connected to a gas engine; a second exhaust pipe 54 which extends from the lower space LS, penetrates through the partition wall 52, and reaches the upper space US and in which one end thereof is open to an inner peripheral surface of the body part 511 in the upper space US and the other end is open to the bottom lid part 512.SELECTED DRAWING: Figure 3

Description

The present invention relates to an outdoor unit of a gas engine driven air conditioner.

For example, as described in Patent Document 1 below, an outdoor unit of a gas engine-driven air conditioner is known. This outdoor unit has a substantially rectangular parallelepiped housing. The internal space of this housing is partitioned in the vertical direction by a partition wall. The space below it (engine room) houses the gas engine, the exhaust heat exchanger that causes heat exchange between the engine cooling water and the exhaust gas, the muffler as a muffling device, etc., and the space above it (heat). The exchange room) houses an outdoor heat exchanger, a cooling fan, etc. that exchange heat between the refrigerant and the outside air.

In addition, the outdoor unit is equipped with a tubular gas-liquid separator extending in the vertical direction. From the engine chamber, the gas-liquid separator penetrates the partition wall, passes through the heat exchange chamber, further penetrates the upper wall of the heat exchange chamber, and projects above the heat exchange chamber (outside the housing). There is. The exhaust gas discharged from the gas engine and passing through the exhaust heat exchanger and the muffler is introduced into the inside from the lower end of the gas-liquid separator. The inner diameter of the gas-liquid separator is larger than the inner diameter of the exhaust pipe. Therefore, when the mixed fluid is introduced into the gas-liquid separator, its flow velocity is reduced. In the gas-liquid separator, the drain water in which the moisture in the exhaust gas is condensed flows down along the inner wall surface of the gas-liquid separator, and only the exhaust gas is discharged from the upper end of the gas-liquid separator.

Japanese Unexamined Patent Publication No. 2002-54434

As described above, in the outdoor unit of Patent Document 1, a part (lower half) of the muffler and the gas-liquid separation device is arranged in the engine room. As described above, the number of parts in the engine room is large, and it is difficult to reduce the size of the engine room (or secure a space for arranging other parts).

An object of the present invention is to provide an outdoor unit of a gas engine-driven air conditioner in which the number of parts in an engine room is reduced. In the following description of each component of the present invention, in order to facilitate understanding of the present invention, the reference numerals of the corresponding parts of the embodiments are described in parentheses, but each component of the present invention is described. It should not be construed as limited to the configuration of the corresponding parts indicated by the reference numerals of the embodiments.

In order to achieve the above object, the outdoor unit (1) of the gas engine-driven air exchanger (AC) according to the present invention is provided by the engine room (ER) in which the gas engine (20) is arranged and the gas engine. It is provided with a heat exchange room (CR) in which a heat exchange device (30) that is driven to generate heat exchange between the refrigerant and the outside air is arranged. The outdoor unit has a tubular main body (511) extending in the vertical direction in the heat exchange room and a bottom lid (512) that closes the lower end of the main body, and the upper end of the main body has. An open tubular member (51), a partition wall (52) provided in the main body of the tubular member, and partitioning the internal space of the main body into an upper space and a lower space, and the main body of the main body. A first exhaust pipe that penetrates the bottom lid portion from the outside and reaches the lower space, one end of which is open toward the partition wall, and the other end is connected to the gas engine. A first exhaust pipe (53) and a second exhaust pipe that penetrates the partition wall from the lower space to the upper space, and one end thereof is inside the main body in the upper space. A second exhaust pipe (54), which is open toward the peripheral surface and whose other end is open toward the bottom lid, is provided.

In one aspect of the present invention, there is provided a drain pipe (55) that penetrates the bottom lid portion from below the main body portion, passes through the lower space, and further penetrates the partition wall to reach the upper space.

In the outdoor unit configured as described above, the exhaust gas discharged from the gas engine is introduced into the lower space from the first exhaust pipe. Exhaust gas discharged from the other end of the first exhaust pipe is reflected by the partition wall and flows downward. Then, the exhaust gas flowing downward is introduced into the second exhaust pipe. In this way, the direction of the exhaust gas flow is folded back a plurality of times. This reduces noise. That is, the lower half of the tubular member (the portion below the partition wall), the partition wall, the first exhaust pipe, and the second exhaust pipe function as a muffler (silencer).

The exhaust gas introduced into the second exhaust pipe reaches the upper space and is blown from the second exhaust pipe to the inner peripheral surface of the main body. As a result, the exhaust gas flows along the inner peripheral surface of the main body portion, and a spiral swirling flow of the exhaust gas is formed in the upper space. In this way, the exhaust gas that swirls along the inner peripheral surface of the main body is cooled, and the moisture in the exhaust gas is condensed. Such drain water flows down along the inner peripheral surface of the main body. The exhaust gas from which the water has been removed as described above is discharged from the upper end of the main body. As described above, the upper half of the tubular member (the portion c above the partition wall), the partition wall, and the portion including the second exhaust pipe function as a gas-liquid separation device.

In the outdoor unit according to the present invention, a tubular member having a portion that functions as a muffler and a portion that functions as a gas-liquid separation device is arranged in the heat exchange room. Therefore, according to the present invention, the number of parts in the engine room can be reduced as compared with the conventional outdoor unit. Further, the engine room can be miniaturized (or space for arranging other parts can be secured).

In another aspect of the present invention, a through hole (TH ₅₅ ) is provided at the lower end of the peripheral wall portion of the drain pipe, which is located in the lower space.

According to this, even if a part of the water in the exhaust gas introduced into the lower space is condensed in the lower space. Such drain water can be discharged from the drain pipe.

It is the schematic of the gas engine drive type air conditioner to which the outdoor unit which concerns on one Embodiment of this invention is applied. It is a block diagram which shows the outline of the structure of the outdoor unit of FIG. It is a perspective view which shows the internal structure of an exhaust device. It is sectional drawing of the exhaust system.

Hereinafter, the outdoor unit 1 according to the embodiment of the present invention will be described. The outdoor unit 1 is applied to a gas engine-driven air conditioner AC. As shown in FIG. 1, the gas engine-driven air conditioner AC includes a refrigerant pipe P as a circulation path through which the refrigerant circulates, and an indoor unit IU and an outdoor unit OU interposed in the refrigerant pipe P. The gas engine-driven air conditioner AC circulates the refrigerant along the refrigerant pipe P, and causes heat exchange between the refrigerant and the air in the indoor unit IU and the outdoor unit OU. As a result, the temperature of the air in the space where the indoor unit IU is installed is adjusted. Since the configuration of the indoor unit IU is the same as that of the indoor unit of a well-known air conditioner and is not directly related to the present invention, the description of the indoor unit IU will be omitted.

Next, the configuration of the outdoor unit OU will be described (see FIG. 2). The outdoor unit OU includes a housing 10 having a substantially rectangular parallelepiped shape. The housing 10 includes a substantially rectangular parallelepiped frame formed by combining a plurality of skeleton members, and a plurality of exterior panels attached to the frame. That is, a closed space is formed inside the housing 10. A partition wall 11 perpendicular to the vertical direction is attached to the inside of the housing 10. As a result, the space inside the housing 10 is divided into an engine room ER and a heat exchange room CR. The space below the partition wall 11 is the engine room ER, and the space above the partition wall 11 is the heat exchange room CR.

The gas engine 20 is housed in the engine room ER. On the other hand, the heat exchange room CR houses an outdoor heat exchanger 30, a cooling fan 40, an exhaust device 50, and the like.

The gas engine 20 includes an engine body 21, a deodorizing device 22, and an exhaust heat exchanger 23. The gas engine 20 drives a compressor (not shown). The compressor sucks in the refrigerant, compresses the refrigerant, and discharges the refrigerant. As a result, the refrigerant is circulated along the refrigerant pipe P. The exhaust gas from the engine body 21 is discharged to the outside of the outdoor unit 1 via the deodorizing device 22, the exhaust heat exchanger 23, and the exhaust device 50 described later. The deodorizing device 22 includes a catalyst for removing the malodor of the exhaust gas of the engine main body 21. The exhaust heat exchanger 23 causes heat exchange between the cooling water of the engine main body 21 and the exhaust gas.

The outdoor heat exchanger 30 causes heat exchange between the refrigerant and the outside air. The cooling fan 40 blows outside air onto the outdoor heat exchanger 30.

As shown in FIGS. 3 and 4, the exhaust device 50 includes a tubular member 51, a partition wall 52, a first exhaust pipe 53, and a second exhaust pipe 54. Further, the exhaust device 50 includes a drain pipe 55.

The tubular member 51 has a cylindrical main body portion 511 extending in the vertical direction and a bottom lid portion 512 that closes the lower end of the main body portion 511. The vertical dimension (length) of the main body 511 is slightly larger than the vertical dimension (length) of the heat exchange room CR. The outer peripheral surface of the intermediate portion (or upper end portion) of the main body portion 511 in the longitudinal direction is supported by the housing 10 via a bracket (not shown). A through hole TH _TB is provided in the top wall TB of the heat exchange room CR, and the upper end portion of the main body portion 511 projects upward from the upper surface of the top wall TB from the through hole TH _TB (FIG. 2). reference). On the other hand, the lower end of the main body portion 511 is located slightly above the partition wall 11.

The bottom lid portion 512 has a bottom wall portion 512a and a peripheral wall portion 512b (see FIG. 3). The bottom wall portion 512a is a disk perpendicular to the vertical direction. The outer diameter of the bottom wall portion 512a is slightly smaller than the inner diameter of the main body portion 511. A through hole THA _512a into which the first exhaust pipe 53, which will be described later, is inserted is formed in the bottom wall portion 512a (see FIG. 4). Further, the bottom wall portion 512a is formed with a through hole THB _512a into which the drain pipe 55 described later is inserted. The peripheral wall portion 512b extends along the outer peripheral edge portion of the bottom wall portion 512a. The peripheral wall portion 512b is an annular wall portion extending along the outer peripheral edge portion of the bottom wall portion 512a. The peripheral wall portion 512b is perpendicular to the bottom wall portion 512a. The bottom lid portion 512 is inserted into the main body portion 511 from the lower end of the main body portion 511, and the outer peripheral surface of the peripheral wall portion 512b and the inner peripheral surface of the main body portion 511 are welded. Specifically, several locations (for example, three locations) in the circumferential direction of the peripheral wall portion 512b are spot welded to the inner peripheral surface of the lower end portion of the main body portion 511. In this way, the bottom lid portion 512 is fixed to the lower end portion of the main body portion 511.

The partition wall 52 has a partition wall portion 521 and a peripheral wall portion 522 (see FIG. 3). The partition wall portion 521 is a disk perpendicular to the vertical direction. The outer diameter of the partition wall portion 521 is slightly smaller than the inner diameter of the main body portion 511. The partition wall portion 521 is formed with a through hole THA ₅₂₁ into which a second exhaust pipe 54, which will be described later, is inserted (see FIG. 4). Further, the partition wall portion 521 is formed with a through hole THB ₅₂₁ into which the drain pipe 55 described later is inserted. The peripheral wall portion 522 is an annular wall portion extending along the outer peripheral edge portion of the partition wall portion 521. The peripheral wall portion 522 is perpendicular to the partition wall portion 521. The partition wall portion 521 is inserted into the main body portion 511 from the upper end of the main body portion 511, and is arranged at a substantially central portion in the longitudinal direction of the main body portion 511. Then, the outer peripheral surface of the peripheral wall portion 522 and the inner peripheral surface of the main body portion 511 are welded. Specifically, several locations (for example, three locations) in the circumferential direction of the peripheral wall portion 522 are spot welded to the inner peripheral surface of the intermediate portion of the main body portion 511. In this way, the partition wall 52 is fixed to the intermediate portion of the main body portion 511. In this way, the internal space S of the main body portion 511 is divided into the upper space US and the lower space LS by the partition wall 52. That is, the space above the partition wall 521 is the upper space US, and the space below the partition wall 521 is the lower space LS.

The first exhaust pipe 53 is a cylindrical member extending in the vertical direction. The outer diameter of the first exhaust pipe 53 is smaller than the inner diameter of the main body 511. Here, a through hole THA ₁₁ is formed in a portion of the partition wall 11 located below the through hole THA _512a of the bottom lid portion 512 (see FIG. 2). The first exhaust pipe 53 extends from the lower side to the upper side of the partition wall 11, passes through the through hole THA ₁₁ and the through hole THA _512a , and reaches the lower space LS. The upper end of the first exhaust pipe 53 is located slightly below the partition wall portion 521. The upper end of the first exhaust pipe 53 is open toward the lower surface of the partition wall portion 521. On the other hand, the other end of the first exhaust pipe 53 is connected to the gas engine 20.

The second exhaust pipe 54 is a cylindrical member extending in the vertical direction. The outer diameter and inner diameter of the second exhaust pipe 54 are the same as those of the first exhaust pipe 53. The second exhaust pipe 54 extends from the lower side to the upper side of the partition wall portion 521, passes through the through hole THA ₅₂₁ , and reaches the upper space US. The upper end of the second exhaust pipe 54 is located slightly above the partition wall portion 521. One end of the second exhaust pipe 54 is curved toward the inner peripheral surface of the main body 511. That is, one end of the second exhaust pipe 54 is opened toward the inner peripheral surface of the main body portion 511. On the other hand, the other end of the second exhaust pipe 54 is located slightly above the bottom wall portion 512a. The other end of the second exhaust pipe 54 is open toward the bottom wall portion 512a.

The drain pipe 55 is a cylindrical member extending in the vertical direction. The outer diameter and inner diameter of the drain pipe 55 are slightly larger than those of the first exhaust pipe 53. Here, the through hole THB ₁₁ is formed in the portion of the partition wall 11 located below the through hole THB _512a of the bottom lid portion 512 (see FIG. 2). The drain pipe 55 extends from the lower side to the upper side of the partition wall 11, passes through the through hole THB ₁₁ and the through hole THB _512a , passes through the lower space LS, and further passes through the through hole THB ₅₂₁ to reach the upper space US. .. The upper end of the drain pipe 55 is located in the same plane as the upper surface of the partition wall portion 521. The lower end of the drain pipe 55 is connected to a water storage device (drain pan) (not shown). Further, a through hole TH ₅₅ is formed at the lower end of a portion of the peripheral wall of the drain pipe 55 located in the lower space LS (see FIG. 3).

The exhaust gas discharged from the gas engine 20 is introduced from the first exhaust pipe 53 into the lower space LS of the exhaust device 50. The exhaust gas discharged from the upper end of the first exhaust pipe 53 is reflected by the partition wall portion 521 and flows downward. Then, the exhaust gas is introduced into the second exhaust pipe 54. In this way, the direction of the exhaust gas flow is folded back a plurality of times (twice in this embodiment). This reduces noise. That is, the lower half of the exhaust device 50 (the portion below the partition wall 521) functions as a muffler (silencer).

The exhaust gas introduced into the second exhaust pipe 54 reaches the upper space US of the exhaust device 50 and is blown from the upper end of the second exhaust pipe 54 to the inner peripheral surface of the main body 511. As a result, the exhaust gas flows along the inner peripheral surface of the main body portion 511, and a spiral swirling flow of the exhaust gas is formed in the upper space US. In this way, the exhaust gas swirling along the inner peripheral surface of the main body 511 is cooled, and the water content in the exhaust gas is condensed. Such drain water flows down along the inner peripheral surface of the main body portion 511 and reaches the upper surface of the partition wall portion 521. Then, the drain water passes through the drain pipe 55 and reaches the water storage device (drain pan). The exhaust gas from which the water has been removed as described above is discharged from the upper end of the main body 511. In this way, the upper half of the exhaust device 50 (the portion above the partition wall 521) functions as a gas-liquid separation device.

A part of the water in the exhaust gas introduced from the exhaust heat exchanger 40 into the lower space LS condenses in the lower space LS. Such drain water enters the drain pipe 55 through the through hole TH ₅₅ of the drain pipe 55, passes through the drain pipe 55, and reaches the water storage device (drain pan).

As described above, the exhaust device 50 in the present embodiment corresponds to a device in which a sound deadening device and a gas-liquid separation device are integrated. The exhaust device 50 is arranged in the heat exchange room CR. Therefore, according to the present embodiment, the number of parts can be reduced as compared with the conventional outdoor unit. Further, since the number of parts arranged in the engine room ER can be reduced, the engine room ER can be miniaturized (or a space for arranging other parts can be secured).

Furthermore, the practice of the present invention is not limited to the above-described embodiment, and various changes can be made as long as the object of the present invention is not deviated.

For example, the exhaust heat exchanger 40 in the above embodiment may be omitted. That is, the first exhaust pipe 53 may be directly connected to the gas engine 20. It is also possible to omit the through holes _{TH 55} of the drain pipe 55.

1 ... outdoor unit, 10 ... housing, 20 ... gas engine, 30 ... outdoor heat exchanger, 40 ... cooling fan, 50 ... exhaust device, 51 ... tubular member, 52 ... partition wall, 53 ... first exhaust pipe, 54 ... second exhaust pipe, 55 ... drain pipe, 511 ... main body, 512 ... bottom lid, 512a ...・ Bottom wall part, 512b ・ ・ ・ peripheral wall part 521 ・ ・ ・ partition wall part 522 ・ ・ ・ peripheral wall part, AC ・ ・ ・ gas engine driven air conditioner, CR ・ ・ ・ heat exchange room, ER ・ ・ ・Engine room, IU ... indoor unit, LS ... lower space, OU ... outdoor unit, P ... refrigerant pipe, S ... internal space, US ... upper space

Claims (3)

The engine room where the gas engine is located and
An outdoor unit of a gas engine-driven air conditioner, comprising a heat exchange room in which a heat exchange device driven by the gas engine to generate heat exchange between the refrigerant and the outside air is arranged.
A tubular member having a tubular main body extending in the vertical direction in the heat exchange room and a bottom lid portion for closing the lower end of the main body, and a tubular member having an open upper end of the main body
A partition wall provided in the main body of the tubular member and dividing the internal space of the main body into an upper space and a lower space.
A first exhaust pipe that extends from the outside of the main body to the lower space through the bottom lid, one end of which is open toward the partition wall, and the other end of the gas engine. With the connected first exhaust pipe,
A second exhaust pipe that penetrates the partition wall from the lower space to the upper space, one end of which is opened toward the inner peripheral surface of the main body in the upper space, and the like. A second exhaust pipe whose end is open toward the bottom lid,
An outdoor unit of a gas engine-driven air conditioner equipped with. In the outdoor unit of the gas engine-driven air conditioner according to claim 1.
An outdoor unit of a gas engine-driven air conditioner provided with a drain pipe that penetrates the bottom lid portion from below the main body portion, passes through the lower space, and further penetrates the partition wall to reach the upper space. .. In the outdoor unit of the gas engine-driven air conditioner according to claim 2.
An outdoor unit of a gas engine-driven air conditioner in which a through hole is provided at the lower end of a peripheral wall portion of the drain pipe and a portion located in the lower space.

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