JP3460672B2 - Outdoor unit of air conditioner and air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an air conditioner and an air conditioner provided with the outdoor unit, and particularly, connecting a communication pipe provided between the outdoor unit and the outdoor unit to the outdoor unit. The present invention relates to the arrangement structure of the closing valve used in.

[0002]

2. Description of the Related Art Conventionally, a so-called separate type air conditioner in which an indoor unit and an outdoor unit are connected by a connecting pipe (see, for example, Japanese Patent Application Laid-Open No. 8-100944).
In general, after the outdoor unit and the indoor unit are installed, the communication pipe with the indoor unit is connected to a closing valve provided at the end of the internal circuit of the outdoor unit to form a refrigerant circuit. ing. Then, the air conditioner, by opening the closing valve after connecting the communication pipe,
The refrigerant is configured to be able to flow between the outdoor unit and the indoor unit.

By the way, a multi-type air conditioner for a building, for example, in which a plurality of indoor units are connected to at least one outdoor unit, has a large pipe diameter and is closed when the capacity becomes large. The valve also becomes larger. In particular, when the outer diameter of the gas side pipe is increased to about φ38.1 mm or more, the gas side closing valve becomes large and it is necessary to firmly fix the gas side closing valve to the casing. The capacity when using a gas pipe having the above pipe diameter is, for example, a rated cooling capacity of approximately 69 Kw or more, and in this case, a liquid pipe having an outer diameter of approximately φ22.2 mm is used.

FIG. 1 is a partially cutaway front view of the outdoor unit in the case of using a large gas side closing valve corresponding to a large pipe diameter of φ38.1 mm or more, and FIG.
1 is shown. 12 to 13 respectively show a front view, a plan view, and a side view in which the portion where the closing valve is disposed are enlarged.

As shown in these figures, when a large gas side stop valve (18) is used, the gas side stop valve (18) is the bottom plate (23) of the casing (20) of the outdoor unit (2). In general, a structure in which the base member (24) and the like are firmly fixed to each other is used. Also, normally, the gas side communication pipe (17a)
Since the piping is installed so that the liquid side communication pipe (17b) is lined up outside the machine, the liquid side closing valve (19) is generally installed next to the gas side closing valve (18). . Note that FIG. 10 and FIG.
In 2, the connecting pipes (17a, 17b) are omitted.

As described above, in the conventional apparatus having a large capacity, a structure in which the gas side closing valve (18) and the liquid side closing valve (19) are arranged side by side in the outdoor unit (2) is generally adopted. Therefore, it is common to arrange the both closing valves (18, 19) so that the pipe connection ports (18a, 19b) face the front side of the casing (20) as shown in the figure. When the connecting pipes (17a, 17b) are arranged laterally or downward from the casing (20), the closing valves (18, 19) penetrate the front plate (21) of the casing (20). The connecting pipes (17a, 17b) pulled out of the machine are bent outside the outdoor unit (2). The connecting pipes (17a, 17b) are shown in FIG.
It shows a state in which the casing (20) is bent at the front surface when the casing (20) is arranged laterally.

[0007]

[Problems to be Solved by the Invention] However, in this way, the connecting pipes (17a, 17b) are always the casing of the outdoor unit (2).
With the configuration of penetrating the front plate (21) of (20), for example, when multiple outdoor units (2) are installed on the roof of a building, etc., when the installation space between the outdoor units (2) is narrow, etc. However, the piping work became difficult and the workability was sometimes extremely reduced.

The present invention was devised in view of the above problems, and an object of the present invention is to provide a closing valve (1
It is to improve the arrangement structure of (8, 19) to increase the degree of freedom in the direction of drawing out the connecting pipes (17a, 17b) from the casing (20), and thereby to improve the workability during piping construction.

[0009]

SUMMARY OF THE INVENTION The present invention is a gas side shutoff valve.
The feature is that (18) is arranged laterally in the vicinity of the front plate (21) and apart from the side plate (22).

More specifically, the first solution provided by the present invention is to provide a gas side closing valve (1) to which a gas side connecting pipe (17a) is connected.
8) and the liquid side connection pipe (17b) are connected to the liquid side stop valve (19)
It is premised on the outdoor unit of the air conditioner having the inside of the casing (20). And, the gas side stop valve (18),
Connect the pipe connection port (18a) to the side plate (22) of the casing (20).
It is arranged in the vicinity of the front plate (21) so as to be separated from the side plate (22) by a predetermined distance in the direction of.

In the above structure, the gas side shutoff valve (18) is
A connection corresponding to the gas side communication pipe (17a) with an outer diameter of 38.1 mm or more.
It has a continuous bore and is directly connected to the bottom plate (23) of the casing (20).
It is fixed by the contact or the base member (24).

Further , the liquid side closing valve (19) is a gas side closing valve (1
On the side of the pipe connection port (18a) side of 8), the gas side stop valve (18)
It is located above Rimo. Furthermore, liquid side shutoff valve (19)
Is on the gas side of the front plate (21) of the casing (20).
It is located behind the shutoff valve (18).

The second means for solving the problems of the present invention is as follows.
In the above first solution means, the liquid side stop valve (19) is
Piping connection (19b) for connecting pipe (17b) is casing (20)
Place it face down towards the bottom plate (23) of the
It is a thing.

The third means for solving the problems of the present invention is as follows.
In the above first or second solving means, the casing (2
Pipe hole (H) through which the gas side communication pipe (17a) and the liquid side communication pipe (17b) pass through any one of the front plate (21), side plate (22), and bottom plate (23) of (0). ) Is formed.

The fourth solution provided by the present invention is as follows.
In the third solving means, the front plate (21), the side plate (22), and the bottom plate (23) of the casing (20).
To form openings (21a, 22a, 23a) in the
One of (21a, 22a, 23a) is used as a piping hole (H) through which the gas side communication pipe (17a) and the liquid side communication pipe (17b) penetrate,
The remaining openings are closed by covers (26, 27, 28).

The fifth means for solving the problems of the present invention is as follows.
The outdoor unit (2) having at least the compressor (11) and the outdoor heat exchanger (13) and the indoor unit (3) having at least the indoor heat exchanger (16) are connected to the gas side communication pipe (17a ) And the liquid side communication pipe (17b) are connected. Then, the outdoor unit according to any one of claims 1 to 4 is used as the outdoor unit (2).

-Operation- In the above first solution means, with respect to the gas side closing valve (18),
The gas side communication pipe (17a) is attached from the side plate (22) side of the outdoor unit (2). In this case, the liquid side stop valve (1
Naturally, 7b) is arranged at a position displaced from the pipe connection port (18a) of the gas side stop valve (18) so as not to interfere with the connection of the gas side communication pipe (17a). Therefore, the gas side communication pipe (17a) can be pulled out from the side plate (22) to the outside of the machine without bending in the outdoor unit (2), and the pipe connection port (18a) and the side plate (22) can be drawn. It is also possible to bend it in the outdoor unit (2) using the space between and to draw it out of the machine from the front plate (21) and the bottom plate (23).
Further, since the liquid side communication pipe (17b) has a smaller diameter than the gas side communication pipe, it can be drawn out in the direction along the gas side communication pipe (17a).

In the first solution, the liquid side closing valve (19)
Is disposed on the side of the gas side stop valve (18) on the side of the pipe connection port (18a) and above the gas side stop valve (18) . Also, the liquid
The side shutoff valve (19) is located behind the gas side shutoff valve (18).
It is placed. Therefore, connect each connecting pipe (17a, 17b)
Connect the connecting pipes (17a, 17b) to each other
Don't cross Also, for example, pull the connecting pipes (17a, 17b) forward.
In case of discharge, connect the liquid side communication pipe (17b) to the gas side communication pipe (1
By pulling from below or above 7a)
Therefore, the interference between the connecting pipes (17a, 17b) can be avoided.

Further, in the above-mentioned second solution means, the liquid side closure
The valve (19) has a pipe connection port (19b) for the liquid side communication pipe (17b).
So that it faces the bottom plate (23) of the casing (20).
It is arranged downward. Therefore, the liquid side communication pipe (1
7b) is the bottom plate (2) without bending inside the outdoor unit (2).
3) Pull it out of the machine or bend it in the outdoor unit (2).
The front plate (21) and side plates (22) to the outside of the machine.
You can put it out.

In the third solution, the pipe hole (H) formed in any one of the front plate (21), the side plate (22) and the bottom plate (23) of the casing (20). From this, the gas side communication pipe (17a) and the liquid side communication pipe (17b) are drawn out.

In the fourth solution, the openings (21a, 22a, 23a) preformed in the front plate (21), the side plate (22) and the bottom plate (23) of the casing (20).
The remaining openings are closed by the covers (26, 27, 28) except those used as the piping holes (H) for drawing out the gas side communication pipe (17a) and the liquid side communication pipe (17b).

[0022]

Therefore, according to each of the above solving means, the connecting pipes (17a, 17b) can be easily pulled out to the front, side, and downward of the casing (20). Therefore, the connecting pipes (17a, 17b) can be pulled out in the direction. The degree of freedom is improved, and workability during piping construction is improved. That is, if there is little space on the front side of the casing (20), such as when installing multiple outdoor units (2), the connecting pipes (17a, 17b) should be pulled out from the side of the casing (20). Correspondence becomes easy.

Further, according to the first solving means, since the gas side closing valve (18) is laterally arranged in the vicinity of the front plate (21), the gas side connecting pipe (17a) is closed. Valve (1
8) Can be easily attached. In addition, the gas-side shutoff valve (18) generally has an opening / closing operation part (18d) whose gas-side communication pipe (1
Since it is provided at the end opposite to the pipe connection port (18a) of 7a), the opening / closing operation part (18d) is not provided in the conventional structure in which the pipe connection port (18a) is arranged toward the front plate (21). casing
The operation portion (18d) is located near the front plate (21), while the operation portion (18d) is located laterally, while the operation portion (18d) is located in the back of the (20), so that the opening / closing operation can be easily performed.

Further, according to this first solution means, since the gas side closing valve (18) is made relatively large and is fixed to the bottom plate (23), the gas side closing valve (18) is made strong. Therefore, the structure suitable for an outdoor unit of an air conditioner having a large rated capacity can be obtained.

Further, according to the first solving means, by arranging the arrangement of the liquid side closing valve (19) with respect to the gas side closing valve (18), the gas side connecting pipe (17a) and the liquid side connecting pipe (17a) (1
It is possible to reliably prevent 7b) from interfering with the aircraft.

According to the second solving means, the liquid side is
By identifying the direction of the closing valve (19), the gas side communication
Corresponding to the drawing direction of the piping (17a), the liquid side communication piping (17
b) can be easily pulled out.

Further, according to the third solving means, the pipe hole provided in any one of the front plate (21), the side plate (22) and the bottom plate (23) of the casing (20).
(H) through gas side communication pipe (17a) and liquid side communication pipe (1
7b) can be pulled out of the machine. Therefore, the casing (20) of the outdoor unit (2) corresponding to the arrangement of the closing valves (18, 19) can be put to practical use.

Further, according to the fourth solving means, the openings (21a, 22a, 23a) are previously formed in the front plate (21), the side plate (22) and the bottom plate (23) of the casing (20). Pre-formed, gas side communication pipe (17a) and liquid side communication pipe (17b)
The opening (21a, 22a, 2
Since 3a) is closed by the covers (26, 27, 28), piping can be performed easily, and a different casing is used even if the connecting pipes (17a, 17b) are drawn in different directions. There is no need, and the increase in cost can be suppressed.

Further, according to the fifth solving means, since the outdoor unit (2) of the first to fourth solving means is used, when the piping is installed on the outdoor unit (2) side. It is possible to realize an air conditioner with high workability and a high degree of freedom in the direction of drawing out the connecting pipes (17a, 17b).

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

-Refrigerant circuit-First, the schematic configuration of the refrigerant circuit (10) of the air conditioner (1) will be described with reference to FIG. This air conditioner has a plurality of indoor units (3) connected in parallel to one outdoor unit (2), and is configured as a so-called separate type and multi-type.

The refrigerant circuit (10) of this air conditioner (1) is
Compressor (11), four-way switching valve (12), outdoor heat exchanger (13)
An outdoor expansion valve (14), an indoor expansion valve (15), and an indoor heat exchanger (16) are connected in order by a refrigerant pipe (17), and are configured to perform a vapor compression refrigeration cycle. ing. Further, the outdoor unit (2) is provided with a compressor (11), a four-way switching valve (12), an outdoor heat exchanger (13) and an outdoor expansion valve (14), while each indoor unit (3) An indoor expansion valve (15) and an indoor heat exchanger (16) are provided in the room, and each indoor unit (3) is connected in parallel to the outdoor unit (2).

The refrigerant circuit of FIG. 1 is a simplified version of the actual circuit. For example, the compressor (11) has a variable capacity compressor for controlling the number of revolutions by an inverter, and a constant on / off control. Used in combination with a capacity compressor. Further, a liquid receiver, an accumulator, and other auxiliary equipment are also provided in the outdoor unit (2), but these are omitted in the refrigerant circuit (10) of FIG.

A gas side closing valve (18) and a liquid side closing valve (19) are provided at the end of the internal circuit of the outdoor unit (2). Then, connect the gas side shutoff valve (18) to the gas side communication pipe (17
a) is connected, and the liquid side shutoff valve (19) is connected to the liquid side communication pipe (17b).
The outdoor unit (2) and each indoor unit (3) are connected by these connecting pipes (17a, 17b).

Each closing valve (18, 19) is closed when the outdoor unit (2) and the indoor unit (3) are installed.
Then, each shutoff valve (18, 19) is opened after installing each unit (2, 3) and connecting the communication pipes (17a, 17b) to each shutoff valve (18, 19), thereby opening the refrigerant circuit. The refrigerant can circulate in the inside of (10).

-Driving operation- Next, the operation of the air conditioner will be described.

First, during the cooling operation, the four-way switching valve (12) is set to the state shown by the solid line in FIG. Then, the high-temperature high-pressure gas refrigerant discharged from the compressor (11) flows into the outdoor heat exchanger (13) through the four-way switching valve (12) to exchange heat with the outdoor air,
Condensate and liquefy. At this time, the outdoor expansion valve (14) is fully opened, and the liquid refrigerant passes through the outdoor expansion valve (14) and flows into each indoor unit (3) through the liquid side communication pipe (17b). The refrigerant is decompressed to a predetermined low pressure by each indoor expansion valve (15) to become a two-phase refrigerant, and further heat-exchanges with indoor air in the indoor heat exchanger (16) to evaporate. Then, the indoor air cooled at that time is blown into the room by an indoor fan (not shown) to cool the room. Further, the gas refrigerant evaporated in the indoor heat exchanger (16) returns to the outdoor unit (2) through the gas side communication pipe (17a) and is sucked into the compressor (11). During the cooling operation, the refrigerant circulates as described above.

On the other hand, during the heating operation, the four-way switching valve (12) is set to the communication state indicated by the broken line in FIG. And compressor (11)
The high-temperature and high-pressure gas refrigerant discharged from the four-way switching valve (12)
To flow into the indoor heat exchanger (16) of each indoor unit (3) to exchange heat with the indoor air, condense and liquefy. The indoor air heated at that time is blown into the room by the indoor fan to heat the room. Indoor expansion valve (15) during this heating operation
Is fully open, and the liquid refrigerant returns from the indoor expansion valve (15) to the outdoor unit (2) through the liquid side communication pipe (17b). The refrigerant is decompressed to a predetermined low pressure by the outdoor expansion valve (14) to become a two-phase refrigerant, further heat-exchanged with outdoor air in the outdoor heat exchanger (13) and evaporated, and then the four-way switching valve (12) is turned on. It is sucked into the compressor (11) via the. During the heating operation, the operation of circulating the refrigerant is performed as described above.

In both the cooling operation and the heating operation, the indoor expansion valve (15) is stopped in the stopped indoor unit (3).
Is closed and the refrigerant is set in a state where it does not flow through the indoor heat exchanger (16). At this time, the indoor fan is also in a stopped state, and no air is blown into the room. The capacity of the compressor (11) is controlled according to the operating state at that time.

-Arrangement Structure of Closing Valve- Fig. 2 and Fig. 3 are a partially cutaway front view and a partially cutaway plan view of the outdoor unit (2), respectively. Also, FIGS.
6 and 6 show the gas side closing valve (18) and the liquid side closing valve (1
9 is an enlarged view showing the mounting structure of 9), FIG. 4 is a front view, and FIG.
Is a plan view and FIG. 6 is a left side view.

As shown in the figure, the gas-side shutoff valve (18) has a pipe connection port (18a) for the gas-side communication pipe (17a) of the side plate (22) of the casing (20) of the outdoor unit (2). It is arranged in the vicinity of the front plate (21) in a horizontal posture facing the direction, and a predetermined space is provided between the pipe connection port (18a) and the side plate (22).

The air conditioner (1) of the present embodiment has a rated cooling capacity of 69 Kw, and the gas side connecting pipe (17a) has a nominal diameter of φ38.1 mm or more (for example, φ45 mm). It is used, and the nominal diameter is φ2 for the liquid side communication pipe (17b).
2.2mm is used. The gas side shutoff valve (18)
The base member (24) is attached to the bottom plate (23) of the casing (20) because it has a connection diameter corresponding to the gas side communication pipe (17a) with an outer diameter of φ38.1 mm or more. It is firmly fixed through. The gas side stop valve (18) is a bottom plate of the casing (20) without using the base member (24).
You may fix directly to (23).

The gas side stop valve (18) is connected to the gas side communication pipe (17
A flange (18b) for attaching the connecting pipe (17a) with a flange joint is provided on the pipe connection port (18a) side of a). This flange (18b) is closed by a blocking plate (18c) before installing the air conditioner (1), and the gas side communication pipe (17
When attaching a), the closing plate (18c) is removed and the gas side communication pipe (17a) is fixed with a flange joint. In addition, this gas side stop valve (18) is a pipe connection port.
An operating portion (18d) for opening and closing the valve is provided at the end opposite to (18a).

On the other hand, the liquid side stop valve (19) is provided with the casing (20).
Vertical bracket (25) secured to the bottom plate (23) of the
It is fixed to. In the bracket (25), the leg portion (25a) formed in the shape of a groove-shaped member and the closing valve fixing portion (25b) are connected to each other by the horizontal plate (25c) at a position displaced in the front-rear direction. It is formed by bending a single plate. The legs (25a) are fixed to the bottom plate (23) of the casing (20).

The liquid side stop valve (19) has a mounting portion (19a) which projects laterally to the stop valve fixing portion (25b) of the bracket (25).
It is fixed by screwing. The liquid-side shutoff valve (19) is located at the side of the pipe connection port (18a) of the gas-side shutoff valve (18) and above the gas-side shutoff valve (18). The pipe connection port (19b) for () is arranged downward so as to face the bottom plate (23) of the casing (20). Further, the liquid side closing valve (19) is arranged at a position rearward of the gas side closing valve (18) with respect to the front plate (21). This liquid side stop valve (19) is a flare nut joint type, the piping connection port (19b) by the flare nut (19c) is located below, and the operation part (19d) for opening and closing the valve is the casing (20).
It is located so that it faces toward you.

In the figure, (17c) shows a part of the in-machine gas pipe, and (17d) shows a part of the in-machine liquid pipe.

-Drawing Direction of Connecting Pipe-In the present embodiment, each connecting pipe (17a, 17b) can be drawn out of the casing (20) from the front, side, and bottom. .

<Downward Drawout> FIG. 7 shows a structure in which the connecting pipes (17a, 17b) are drawn out below the casing (20). As shown in FIG. 7, the front plate (21) of the casing (20) and the side plate
(22) and the bottom plate (23) have openings (2
1a, 22a, 23a) are formed. Then, in the example of FIG. 7, the opening (23a) of the bottom plate (23) is used as a piping hole (H) to connect the gas side communication pipe (17a) and the liquid side communication pipe (17a).
While passing through b), the remaining openings (21a, 22a) are closed by covers (26, 27), respectively. This ensures that the bottom plate (2
The piping hole (H) is provided only in 3).

In the example of FIG. 7, the gas side auxiliary pipe which is a part of the gas side connecting pipe (17a) at the time of construction of the pipe on site.
(31) is fixed to the flange (18b) of the gas side closing valve (18) from which the closing plate (18c) is removed by the flange joint (31a) provided at one end side. The gas side auxiliary pipe (31) extends straight from the pipe connection port (18a) toward the side plate (22), then curves downward and projects out of the machine through the pipe hole (H).

The liquid side auxiliary pipe (32) forming a part of the liquid side communication pipe (17b) is flared at one end and fixed to the liquid side closing valve (19) by a flare nut. Then, the liquid side auxiliary pipe (32) is bent so as to be offset from the center line of the liquid side stop valve (19), and at the position on the rear side of the gas side auxiliary pipe (31) from the casing (20) to the outside of the machine. Overhangs.

As described above, the gas side auxiliary pipe (31) and the liquid side auxiliary pipe (32) are arranged such that the positions of the front end portions thereof are aligned front and back. Incidentally, these accessory pipes (31, 32) are used as brazing joints because the diameters of the parts protruding outside the machine are enlarged. In other words, insert the main part of the gas side communication pipe (17a) and liquid side communication pipe (17b) (the part excluding the attached pipes (31, 32)) into this expanded diameter part. Each connecting pipe (17a, 17b) can be fixed by brazing.

<Side pullout> Next, when each connecting pipe (17a, 17b) is pulled out to the side of the casing (20), as shown in FIG. 8, the gas side auxiliary pipe (31)
Is in a substantially straight state inside the casing (20), and protrudes out of the machine from the opening (22a) of the side plate (22) which is the piping hole (H) in this case. Further, the liquid side auxiliary pipe (32) is bent so as to be located below the gas side auxiliary pipe (31),
It projects from the opening (22a) of the side plate (22). Then, the gas side connecting pipe (31) and the liquid side connecting pipe (32) protrude from the side plate (22), and the body part of the gas side connecting pipe (17a) and the liquid side connecting pipe (17b) is attached to the enlarged part of the tip. The connecting pipes (17a, 17b) are fixed by inserting and brazing. In the example of FIG. 8, the opening (21a) of the front plate (21) and the bottom plate (2
The openings (23a) of 3) are closed by the covers (26, 28), respectively.

<Frontward Drawout> Next, FIG. 9 shows a structure in which the connecting pipes (17a, 17b) are pulled out to the front of the casing (20). In this case, the opening (22a) of the side plate (22) and the opening (23a) of the bottom plate (23) are closed by the covers (27, 28), and the opening (21a) of the front plate (21) is closed. ) Is attached with a cover (29) having a pipe hole (H) formed therein. That is, in this example, the opening (21a) itself is not used as the piping hole (H), but the piping hole (H) is formed in a part of the cover (29). This is because the opening (21a) of the front plate (21) is formed in a relatively large area for connecting the auxiliary pipes (31, 32) to the shutoff valves (18, 19). , Attached piping (3
This is to prevent a large gap from being created around (1,32).

The gas side auxiliary pipe (31) is curved toward the front plate (21) at the height on the center line of the gas side stop valve (18) and penetrates through the front plate (21) to reach the liquid side. Attached piping (32)
Penetrates the front plate (21) at a position obliquely below the gas side auxiliary pipe (31). Also in this case, the tip of each accessory pipe (31, 32) is expanded to be a brazing joint and can be fixed by inserting each connecting pipe (17a, 17b) and brazing. There is.

In this example, the gas side auxiliary pipe (31) is bent, but if an elbow is used, for example, the gas side stop valve (18) is arranged closer to the front plate (21). It becomes possible.

As described above, each connecting pipe (17a, 17b) is
Pull out from the outdoor unit (2) from any one of the front plate (21), side plate (22), and bottom plate (23) of the casing (20) using each attached pipe (31, 32). You can Therefore, the communication pipes (17a, 17b) outside the machine can be easily arranged at any of the front side, the side, and the lower side of the outdoor unit.

-Effect of Embodiment- According to this embodiment, the following effects are exhibited.

First, in the above embodiment, the gas side shutoff valve (1
The gas side accessory pipe (31), which is a part of the gas side communication pipe (17a), is attached to the side plate (22) of the casing (20). Therefore, the gas side communication pipe (17a) is pulled out from the side plate (22) to the outside of the machine with almost no bending in the outdoor unit (2) as shown in FIG. 8, or as shown in FIG. 7 and FIG. 2) It can be arranged by bending it inside and pulling it out of the machine from the bottom plate (23) or front plate (21). In addition, as shown in the examples of FIGS. 7 and 9, the liquid side closing valve (19) is arranged at a position displaced from the gas side closing valve (18), and is disposed to the side of the gas side closing valve (18). Since the space is secured, it is easy to bend the gas side connecting pipe (17a) inside the machine.

Further, the liquid side closing valve (19) is replaced with the gas side closing valve (18).
Located on the side of the pipe connection port (18a) above the gas side stop valve (18), and the pipe connection port (19b) for the liquid side communication pipe (17b) is the bottom surface of the casing (20). It is arranged downward so that it faces the plate (23). Therefore, the liquid side communication pipe (17b) is pulled out from the bottom plate (23) to the outside of the machine without being bent so much as shown in FIG. 7, or is bent at a right angle as shown in FIG. 8 and FIG. It can be pulled out from the machine via the side plate (22) or 21).

As described above, in this embodiment, the connecting pipes (17a, 17b) can be easily pulled out to the front, side, and downward of the casing (20), so that the workability at the time of pipe construction is improved. In addition, since the flexibility of piping work is increased, when installing multiple outdoor units (2), each outdoor unit (2)
Even if the space between them is narrow, the pipe construction can be performed more easily than before.

Next, in the present embodiment, since the liquid side closing valve (19) is arranged at a position rearward of the gas side closing valve (18), the connecting pipes (17a, 17b) are connected to the lower side or the side. The communication pipes (17a, 17b) naturally do not interfere with each other when pulling out to one side. On the other hand, when pulling out the connecting pipes (17a, 17b) to the front, the liquid side connecting pipe
By pulling out (17b) from below or above the gas side communication pipe (17a) (from below in the embodiment), interference between the communication pipes (17a, 17b) can be easily avoided.

Further, the gas side stop valve (18) is attached to the front plate.
Since it is arranged horizontally in the vicinity of (21), it is easy to attach the gas side communication pipe (17a) to the gas side shutoff valve (18). The large gas-side shutoff valve (18) generally has an opening / closing operation part (18d) at the pipe connection port (18a) of the gas-side communication pipe (17a).
Since it is provided at the end opposite to a), the pipe connection port
When the (18a) is placed toward the front plate (21), the opening / closing operation section (18d) is located in the back of the casing (20).
When placed sideways, the operation part (18d) will have the front plate (21).
Since it is located closer to the user, opening and closing operations can be easily performed.

With respect to the liquid side closing valve (19), since the liquid side closing valve (19) is arranged downward, the flare nut
The work of turning the (19c) and the opening / closing operation part (19d) with a tool such as a spanner can be easily performed.

On the other hand, in the above embodiment, the casing (20)
The openings (21a, 22a, 23a) are formed in the front plate (21), the side plate (22), and the bottom plate (23), respectively, of which one is used as the piping hole (H) and the other is left. The two are covered with covers (26, 27, 28). Therefore, it is not necessary to use a separate casing (20) even if the connecting pipes (17a, 17b) are drawn out in different directions, and the gas side connecting pipe (17a) and the liquid side connecting pipe (17b) can be kept at a low cost.
It is possible to put the casing (20) of the outdoor unit (2) into practical use in response to the diversification of the drawing direction of the.

Further, according to the above embodiment, in the outdoor unit (2) of the air conditioner having a large rated capacity using the large gas side closing valve (18), the gas side closing valve (18) is installed in the casing (20). ) In the constraint that it is firmly fixed to the bottom of
It is possible to realize a configuration with excellent handling of the connecting pipes (17a, 17b).

Further, according to the above embodiment, for example,
A space is provided under the casing (20) by raising and fixing the outdoor unit (2) slightly above the foundation of the installation part, and the communication pipes (17a, 17b) are pulled out from the bottom plate (23) to create the space. It is also possible to improve the appearance after installation if a connecting plate (17a, 17b) is hidden from the front and side surfaces by providing a decorative plate in that space as a structure that draws out from the side.

[0067]

Other Embodiments of the Invention The present invention may have the following configurations in the above embodiments.

For example, in the above embodiment , pipe connection
It interferes with connecting the gas side communication pipe (17a) to the mouth (18a).
The position of the liquid side stop valve (19) may be changed if the position does not become so . Even in that case, the gas side communication pipe (1
7a) can be pulled out from the casing (20) in three directions, and the liquid side communication pipe (17b) has a small diameter and is easy to pull out in a relatively arbitrary direction. It is possible to improve the workability at the time of pipe construction by increasing the degree of freedom compared to the conventional one.

Further, for example , in the example of FIG. 7, the liquid side auxiliary pipe (32) is bent slightly and drawn out of the machine, but the closing valves (18, 19) may be arranged so that it can be drawn straight out. . This also applies to the case where the gas side auxiliary pipe (31) is slightly bent in the example of FIG.

Further, the opening formed in the casing (20)
The positions and shapes of (21a, 22a, 23a) and the piping hole (H) formed by the openings (21a, 22a, 23a) are not limited to the examples of the above-described embodiment, and can be changed as appropriate.

Further, in the above embodiment, each closing valve (18, 19)
Is located in the left front part inside the casing (20),
You may arrange | position in the right front part. In addition, each connecting pipe (1
7a, 17b) may be pulled out to the back side of the casing (20) in some cases.

Further, since the gas side communication pipe (17a) and the liquid side communication pipe (17b) are basically arranged side by side outside the outdoor unit (2), they are usually arranged in the same direction from the casing (20). , But depending on the case, each connecting pipe (17a, 17b)
May be pulled out from the casing (20) in different directions.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the outdoor unit.

FIG. 3 is a partially cutaway plan view of the outdoor unit.

FIG. 4 is an enlarged front view showing a mounting structure of a gas side closing valve and a liquid side closing valve.

FIG. 5 is an enlarged plan view showing a mounting structure of a gas side closing valve and a liquid side closing valve.

FIG. 6 is an enlarged left side view showing a mounting structure of a gas side closing valve and a liquid side closing valve.

FIG. 7 is a perspective view showing a structure in which a connecting pipe is pulled out from a lower portion of a casing.

FIG. 8 is a perspective view showing a structure in which a connecting pipe is pulled out from a side of a casing.

FIG. 9 is a perspective view showing a structure for pulling out a connecting pipe from the front of a casing.

FIG. 10 is a partially cutaway front view of a conventional outdoor unit.

FIG. 11 is a partially cutaway plan view of a conventional outdoor unit.

FIG. 12 is an enlarged front view showing a mounting structure of a gas side closing valve and a liquid side closing valve in a conventional outdoor unit.

FIG. 13 is an enlarged plan view showing a mounting structure of a gas side closing valve and a liquid side closing valve in a conventional outdoor unit.

FIG. 14 is an enlarged side view showing a mounting structure of a gas side closing valve and a liquid side closing valve in a conventional outdoor unit.

[Explanation of symbols]

(1) Air conditioner (2) Outdoor unit (3) Indoor unit (17a) Gas side connection piping (17b) Liquid side connection piping (18) Gas side closing valve (18a) Pipe connection port (19) Liquid side closing valve (19b) Pipe connection port (20) Casing (21) Front plate (21a) Opening (22) Side plate (22a) Opening (23) Bottom plate (23a) Opening (24) Base member (25) Bracket (26-29) cover (31) Gas side accessory piping (gas side communication piping) (32) Liquid side accessory piping (liquid side communication piping) (H) Piping hole

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F 5/00 F25B 41/04

Claims (5)

(57) [Claims] 1. A casing (20) includes a gas side closing valve (18) to which the gas side connecting pipe (17a) is connected and a liquid side closing valve (19) to which the liquid side connecting pipe (17b) is connected. In the outdoor unit of the air conditioner provided for the gas side closing valve (18), the pipe connection port (18a) is connected to the casing (2
(0) toward the side plate (22) of the side plate (2
As 2) separating the predetermined interval, arranged in the vicinity of the faceplate (21), the gas side shut-off valve (18) has an outer diameter of 38.1mm above the gas side communication distribution
It has a connection diameter corresponding to the pipe (17a), and the casing (20)
Directly on the bottom plate (23) or via the base member (24)
The liquid side shutoff valve (19) is fixed and the gas side shutoff valve (18) is connected to the pipe connection port (18
a) located laterally above the gas-side shutoff valve (18).
The liquid side shutoff valve (19) and the front plate (21) of the casing (20).
An outdoor unit of an air conditioner that is located behind the gas-side stop valve (18) . 2. The liquid side stop valve (19) is a liquid side communication pipe (17b).
The pipe connection port (19b) that connects the
The outdoor unit for an air conditioner according to claim 1, wherein the outdoor unit is arranged downward so as to face the rate (23) . 3. Front plate (21), side of casing (20)
One of the face plate (22) and the bottom plate (23)
The gas side communication pipe (17a) and the liquid side communication pipe (17b)
The outdoor unit for an air conditioner according to claim 1 or 2, wherein a piping hole (H) is formed . 4. A front plate (21), side of a casing (20).
Open the face plate (22) and the bottom plate (23), respectively.
The mouth (21a, 22a, 23a) is formed, and the opening (21a, 22a, 23a
One of a) is gas side communication pipe (17a) and liquid side communication pipe (17b)
Used for the piping hole (H) that penetrates
The outdoor unit for an air conditioner according to claim 3, wherein the portion is closed by a cover (26, 27, 28) . 5. At least a compressor (11) and an outdoor heat exchanger (1)
3) and the outdoor units having a (2), at least the indoor heat exchange
The indoor unit (3) equipped with the exchanger (16) is connected to the gas side.
An empty space connected by the pipe (17a) and the liquid side communication pipe (17b).
The air conditioner, wherein the outdoor unit (2) is any one of claims 1 to 4.
Air conditioner composed of the outdoor unit.