JP7339599B2 - Outdoor unit of gas engine driven air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an outdoor unit for 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 vertically partitioned by partition walls. The space below it (engine room) houses the gas engine, an exhaust heat exchanger that exchanges heat between the engine cooling water and the exhaust gas, and the muffler as a silencer. An outdoor heat exchanger, a cooling fan, and the like, which cause heat exchange between the refrigerant and the outside air, are accommodated in the exchange room).

In addition, this outdoor unit includes a vertically extending tubular gas-liquid separation device. The gas-liquid separator extends from the engine room through the partition wall, through the heat exchange room, through the upper wall of the heat exchange room, and protrudes above the heat exchange room (outside the housing). there is Exhaust gas discharged from the gas engine and having passed through the exhaust heat exchanger and the muffler is introduced into the interior from the lower end of the gas-liquid separation device. The inner diameter of the gas-liquid separator is larger than the inner diameter of the exhaust pipe. Therefore, by introducing the mixed fluid into the gas-liquid separation device, the flow velocity is reduced. In the gas-liquid separation device, drain water in which moisture in the exhaust gas is condensed flows down along the inner wall surface of the gas-liquid separation device, and only the exhaust gas is discharged from the upper end of the gas-liquid separation device.

JP-A-2002-54434

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

An object of the present invention is to provide an outdoor unit for a gas engine-driven air conditioner in which the number of parts in the engine room is reduced. In addition, in the description of each constituent element of the present invention below, in order to facilitate understanding of the present invention, the symbols corresponding to the embodiments are described in parentheses, but each constituent element of the present invention is It should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals in the embodiment.

To achieve the above object, an outdoor unit (1) of a gas engine-driven air conditioner (AC) according to the present invention includes an engine room (ER) in which a gas engine (20) is arranged, and a heat exchange room (CR) in which is arranged a heat exchange device (30) which is driven to cause heat exchange between the refrigerant and the outside air. The outdoor unit has a cylindrical main body (511) extending vertically in the heat exchange room, and a bottom cover (512) closing the lower end of the main body. a cylindrical member (51) that is open; a partition wall (52) that is provided in the body of the cylindrical member and divides the internal space of the body into an upper space and a lower space; A first exhaust pipe extending from the outside through the bottom cover portion to the lower space, one end of which is open toward the partition wall and the other end of which is connected to the gas engine. A first exhaust pipe (53) and a second exhaust pipe extending from the lower space through the partition wall to the upper space, one end of which extends 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 portion, and penetrates the bottom lid portion from below the main body portion to A drain pipe (55) is provided which passes through the lower space, penetrates the partition wall, and reaches the upper space. The exhaust pipe and the second exhaust pipe are arranged between the outer peripheral surface of the drain pipe and the inner peripheral surface of the main body, and one end of the second exhaust pipe extends toward the inner peripheral surface of the main body. curved .

In the outdoor unit configured as described above, exhaust gas discharged from the gas engine is introduced into the lower space through 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 that has flowed downward is introduced into the second exhaust pipe. In this manner, the direction of flow of the exhaust gas is folded back multiple 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 (silencing device).

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

In the outdoor unit according to the present invention, a cylindrical member having a portion functioning as a muffler and a portion functioning as a gas-liquid separator is arranged in the heat exchange room. Therefore, according to the present invention, the number of parts in the engine room can be reduced compared to the conventional outdoor unit. Furthermore, the engine room can be downsized (or a space for arranging other parts can be secured).

In another aspect of the present invention, a through hole ( _TH55 ) is provided at the lower end of the portion of the peripheral wall of the drain pipe that is positioned within the lower space.

According to this, even if some moisture 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.

1 is a schematic diagram of a gas engine-driven air conditioner to which an outdoor unit according to an embodiment of the present invention is applied; FIG. FIG. 2 is a block diagram showing the outline of the configuration of the outdoor unit of FIG. 1; It is a perspective view which shows the internal structure of an exhaust device. It is a sectional view of an exhaust device.

An outdoor unit 1 according to an embodiment of the present invention will be described below. 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 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 pipes P to cause heat exchange between the refrigerant and the air in the indoor unit IU and the outdoor unit OU. Thereby, the temperature of the air in the space where the indoor unit IU is installed is adjusted. The configuration of the indoor unit IU is the same as that of a well-known indoor unit of an air conditioner, and is not directly related to the present invention, so 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 substantially rectangular parallelepiped housing 10 . The housing 10 includes a substantially rectangular parallelepiped frame configured by combining a plurality of frame 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 inside the housing 10 . Thereby, the space inside the housing 10 is divided into an engine room ER and a heat exchange room CR. The space below the partition 11 is the engine room ER, and the space above the partition 11 is the heat exchange room CR.

A gas engine 20 is housed in the engine room ER. On the other hand, the heat exchange room CR accommodates 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 refrigerant, compresses the refrigerant, and discharges it. Thereby, the refrigerant is circulated along the refrigerant pipe P. As shown in FIG. Exhaust gas from the engine main body 21 is discharged to the outside of the outdoor unit 1 through the deodorizing device 22, the exhaust heat exchanger 23, and an exhaust device 50, which will be described later. The deodorizing device 22 has a catalyst that removes the bad smell of the exhaust gas from the engine main body 21 . The exhaust heat exchanger 23 causes heat exchange between the cooling water of the engine 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 .

The exhaust device 50 includes a cylindrical member 51, a partition wall 52, a first exhaust pipe 53 and a second exhaust pipe 54, as shown in FIGS. Furthermore, the exhaust device 50 includes a drain pipe 55 .

The tubular member 51 has a vertically extending cylindrical body portion 511 and a bottom lid portion 512 that closes the lower end of the body portion 511 . The vertical dimension (length) of the body portion 511 is slightly larger than the vertical dimension of the heat exchange room CR. The outer peripheral surface of the middle portion (or the upper end portion) in the longitudinal direction of the body portion 511 is supported by the housing 10 via a bracket (not shown). A through hole TH _TB is provided in the ceiling wall TB of the heat exchange room CR, and the upper end portion of the main body portion 511 protrudes upward from the upper surface of the ceiling wall _TB from the through hole TH TB (see FIG. 2 reference). On the other hand, the lower end of the body portion 511 is positioned 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 512 a is slightly smaller than the inner diameter of the main body portion 511 . The bottom wall portion 512a is formed with a through hole THA _512a into which a first exhaust pipe 53, which will be described later, is inserted (see FIG. 4). Further, the bottom wall portion 512a is formed with a through hole THB _512a into which a drain pipe 55, which will be described later, is inserted. The peripheral wall portion 512b extends along the outer peripheral edge 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 512 b are spot-welded to the inner peripheral surface of the lower end portion of the main body portion 511 . In this manner, 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 part 521 is a circular plate 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 . A through hole THA 521 into which a second exhaust pipe 54, which will be described later, is inserted is formed in the partition wall portion ₅₂₁ (see FIG. 4). Further, the partition wall portion 521 is formed with a through hole THB ₅₂₁ into which a drain pipe 55 (to be 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 arranged substantially in the central portion of the main body portion 511 in the longitudinal direction. 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) of the peripheral wall portion 522 in the circumferential direction are spot-welded to the inner peripheral surface of the intermediate portion of the main body portion 511 . In this manner, the partition wall 52 is fixed to the intermediate portion of the main body portion 511 . In this manner, the internal space S of the body portion 511 is partitioned into the upper space US and the lower space LS by the partition wall 52 . That is, the space above the partition 521 is the upper space US, and the space below the partition 521 is the lower space LS.

The first exhaust pipe 53 is a cylindrical member extending vertically. The outer diameter of the first exhaust pipe 53 is smaller than the inner diameter of the body portion 511 . 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 upward from below 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 positioned 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 vertically. 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 upward from below the partition wall portion 521 and passes through the through hole THA ₅₂₁ to reach the upper space US. The upper end of the second exhaust pipe 54 is positioned slightly above the partition wall portion 521 . One end of the second exhaust pipe 54 curves toward the inner peripheral surface of the body portion 511 . That is, one end of the second exhaust pipe 54 is opened toward the inner peripheral surface of the 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 vertically. The outer diameter and inner diameter of the drain pipe 55 are slightly larger than those of the first exhaust pipe 53 . A through hole THB 11 is formed in a 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 upward from below 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 reservoir (drain pan) not shown. A through hole TH 55 is formed at the lower end of the portion of the peripheral wall of the drain pipe ₅₅ located within the lower space LS (see FIG. 3).

Exhaust gas discharged from the gas engine 20 is introduced into the lower space LS of the exhaust device 50 through the first exhaust pipe 53 . 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 flow of the exhaust gas is turned 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 portion 521) functions as a muffler (silencing device).

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 onto the inner peripheral surface of the main body portion 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 manner, the exhaust gas swirling along the inner peripheral surface of the main body portion 511 is cooled, and moisture 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 reservoir (drain pan). Exhaust gas from which moisture has been removed as described above is discharged from the upper end of main body 511 . Thus, the upper half of the exhaust device 50 (the portion above the partition wall 521) functions as a gas-liquid separation device.

Part of the moisture in the exhaust gas introduced from the exhaust heat exchanger 40 into the lower space LS is condensed 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 reservoir (drain pan).

As described above, the exhaust device 50 in this embodiment corresponds to a device that integrates a silencer and a gas-liquid separation device. This exhaust device 50 is arranged in the heat exchange room CR. Therefore, according to this embodiment, the number of parts can be reduced as compared with the conventional outdoor unit. Furthermore, since the parts arranged in the engine room ER can be reduced, the engine room ER can be downsized (or a space for arranging other parts can be secured).

Furthermore, the implementation of the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the object of the present invention.

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 . Also, the through hole TH ₅₅ of the drain pipe 55 may be omitted.

DESCRIPTION OF SYMBOLS 1... Outdoor unit, 10... Housing, 20... Gas engine, 30... Outdoor heat exchanger, 40... Cooling fan, 50... Exhaust device, 51... Cylinder member, 52... Partition wall, 53... First exhaust pipe, 54... Second exhaust pipe, 55... Drain pipe, 511... Body portion, 512... Bottom lid portion, 512a... Bottom wall portion, 512b: Peripheral wall portion, 521: Partition wall portion, 522: Peripheral wall portion, 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 (2)

an engine room with a gas engine,
an outdoor unit of a gas engine-driven air conditioner, comprising a heat exchange room in which a heat exchange device that is driven by the gas engine and causes heat exchange between the refrigerant and the outside air is arranged,
a tubular member having a tubular main body extending vertically in the heat exchange room and a bottom cover closing the lower end of the main body, the upper end of the main body being open;
a partition wall provided in the main body of the tubular member, which divides the internal space of the main body into an upper space and a lower space;
A first exhaust pipe extending from the outside of the main body portion through the bottom cover portion to the lower space, one end of which is open toward the partition wall and the other end of which is connected to the gas engine. a connected first exhaust pipe;
A second exhaust pipe extending from the lower space through the partition wall to the upper space, one end of which is open toward the inner peripheral surface of the main body in the upper space; a second exhaust pipe whose end is open toward the bottom cover ;
a drain pipe extending from below the main body portion through the bottom cover portion, through the lower space, and further through the partition wall to reach the upper space;
The drain pipe extends vertically at the center of the main body,
The first exhaust pipe and the second exhaust pipe are arranged between the outer peripheral surface of the drain pipe and the inner peripheral surface of the main body,
The exhaust gas discharged from the second exhaust pipe is blown against the inner peripheral surface of the main body so that the exhaust gas flows along the inner peripheral surface of the main body to generate a spiral airflow. 2, one end of the exhaust pipe is curved toward the inner peripheral surface of the main body,
Outdoor unit of gas engine driven air conditioner. 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, wherein a through hole is provided in a lower end portion of a portion of the peripheral wall portion of the drain pipe located in the lower space.

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