JPH09189436A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an air conditioner where maintainability is improved since a part of a relatively complicated refrigerant pipeline including pressure-reducing devices can be removed. SOLUTION: In an air conditioner, a service side until 100 is connected to a heat source side unit by a refrigerant pipeline, and pressure-reducing devices 75 connected to the refrigerant pipeline are accommodated in the heat source unit. By disconnecting joints 33, 40, 72 and 74 that are provided before and after the pressure-reducing devices 75, the pressure-reducing devices 75 can be removed together with a part of the refrigerant pipeline.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which a heat source side unit having a pressure reducing device is connected to a utilization side unit in a refrigeration cycle by using a refrigerant pipe.

[0002]

2. Description of the Related Art Conventionally, a heat source side unit of this type of air conditioner has a port (for example, a nipple, a three-way valve, etc.) for connecting a refrigerant pipe extending from the utilization side unit. Between the gas pipe port and liquid pipe port of this heat source side unit, equipment such as accumulator, compressor, flow path switching valve, heat source side heat exchanger, pressure reducing device, strainer, etc. It is connected by piping so as to form a refrigeration cycle together with the container. These devices are housed in the main body of the narrow heat source side unit, and the piping configuration is quite complicated. In addition to this, when a plurality of usage-side units are connected to one heat-source-side unit, the number of connection ports of the joint section increases, and the piping configuration becomes more complicated.

[0003]

However, in the conventional configuration, since the piping configuration is connected inside the heat source side unit by, for example, welding, if the expansion valve accommodated inside is damaged, for example, There is a problem that the work of exchanging the battery becomes extremely difficult. Also, if the piping configuration of these devices is arranged on the side surface (near the port) of the main unit of the heat source side unit, in order to inspect the compressor, check them from the side of the main unit unless these are removed. There is a problem that you cannot take this out.

Therefore, the present invention has been made in order to solve the above problems, and an air conditioner in which a part of the refrigerant pipe including the expansion valve can be easily removed from other members and the maintainability can be improved. The purpose is to provide a machine.

[0005]

According to a first aspect of the present invention, there is provided a heat source side unit having a compressor, a heat source side heat exchanger and a pressure reducing device, and a use side unit having a use side heat exchanger. In an air conditioner connected by piping so as to form a refrigeration cycle, a first piping connection port provided in the heat source side unit and connected to the piping, the decompression device in the refrigeration cycle, and the heat source. A second pipe connection port provided between the refrigerating cycle and a second heat pipe, and the pressure reducing device provided between the first pipe connection port and the second pipe connection port. It is configured to be separable.

According to a second aspect of the present invention, there is provided a single heat source side unit having a compressor, a heat source side heat exchanger and a plurality of pressure reducing devices, and a plurality of use side units having a use side heat exchanger. In a refrigeration cycle, in an air conditioner configured by connecting pipes so as to form a refrigeration cycle, and a plurality of first pipe connection ports provided in the heat source side unit and connected to the plurality of pipes, respectively. The plurality of pressure reducing devices provided corresponding to the respective use side heat exchangers and a single second pipe connection port provided between the heat source side heat exchangers are provided, and the plurality of first The plurality of decompression devices arranged between the pipe connection port and the second pipe connection port are configured to be separable from the refrigeration cycle at the same time.

According to a third aspect of the present invention, a single heat source side unit equipped with a compressor, a heat source side heat exchanger, and a plurality of pressure reducing devices, and a plurality of usage side units equipped with a usage side heat exchanger are provided. In an air conditioner formed by connecting pipes so as to form a refrigeration cycle, a support plate detachably attached from the heat source side unit, and a plurality of pipes provided on the support plate and to which the plurality of pipes are connected, respectively. A heat source side heat exchanger, and a first pipe connection port, the plurality of pressure reducing devices provided corresponding to the respective use side heat exchangers in the refrigeration cycle, and the heat source side heat exchanger; A second pipe connection port fixed to the unit, and the plurality of decompression devices arranged between the plurality of first pipe connection ports and the second pipe connection ports, and the support plate at the same time. With before It is obtained by separably constructed from the refrigeration cycle.

According to a fourth aspect of the present invention, in an air conditioner in which a heat source side unit and a utilization side unit are connected by piping so as to form a refrigeration cycle, the heat source side unit is provided with the refrigeration cycle of the refrigeration cycle. In the refrigeration cycle, the decompression device forming a part is detached from the refrigeration cycle together with a part of the refrigerant pipe by removing joints provided before and after the decompression device.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show a heat source side unit of an air conditioner using the present invention. In each figure, the main body case 1a of the heat source side unit 1 includes side plates 2 and 3 and a back plate 3
a, a top plate 4, a bottom plate 5, a front plate 6, two grills 7 and 8, mounting legs 9 and the like. Devices such as the heat source side heat exchanger 63 and the compressor 61 are built in the main body case 1a.

The heat source side unit 1 is provided with grips 12, 13, 14 which are used for holding hands when the heat source side unit 1 is carried. Handles 12, 13
Are arranged at substantially the same height in the front-rear direction, the handle 12 is located on the front plate 6, and the handle 13 is located on the back plate 3a.
4, the handle 14 is located slightly below the handle 12 in FIG. 4 and in the lower left corner of the upper grill 7 in FIG. A front panel 6a is fixed to the left half of the front plate 6, and two grills 7 and 8 are attached so as to correspond to the two air blowing holes 6b and 6c of the front panel 6a.

FIG. 5 shows the side plates 2 and 3 of the body case 1a.
Back plate 3a, top plate 4, bottom plate 5, front plate 6, two grills 7,
8 and the mounting legs 9 are shown in a disassembled state. FIG. 6 shows a heat source side heat exchanger 63, a compressor 61, an accumulator 19a, a fan motor 20, which are built-in elements of the main body case 1a.
20, the fans 21, 21, the soundproof member 22, the power transformer 23, the receiver tank 66, etc. are shown. Fan 2
1, 21 are arranged corresponding to the air blowing holes 6b, 6c in FIG. Behind the corner portion CN of the main body case 2 in FIG. 1 has a concave portion 30, and the vertically long concave portion 30 accommodates the unit 42 shown in FIGS. 4 and 7 to 10. This unit 42 includes a thin tube connecting portion (liquid tube) 33,
Thick pipe connection (gas pipe) 34, thin pipe connection (liquid pipe) 35,
Thick pipe connection (gas pipe) 36, thin pipe connection (liquid pipe) 37,
Thick pipe connection (gas pipe) 38, thin pipe connection (liquid pipe) 39,
A thick pipe connection portion (gas pipe) 40 and the like are provided.

Each of the pipes 33 to 40 attached to the connecting portion 32 of FIG. 9 is included in the unit 42 shown in FIG. 11 and constitutes an integral unit 42. The unit 42 is screwed to the body case 1a, and can be easily removed from the body case 1a by removing the screw. By removing the unit 42 from the main body case 1a of FIG. 7, the compressor 61 and the like in the main body case 2 can be easily taken out. Therefore, the compressor 61
Easy to maintain. Further, since the connecting portion 32 is arranged in the recess 30 of the main body case 1a, unlike the conventional heat source side unit, the protruding portion of the connecting portion is eliminated,
Not only is the transportation easy, but the body case 2 can be made compact.

Connection portion 32 of recess 30 of FIGS. 7-10.
A handle 13 on the back side is provided at the upper edge of the upper side, and the handle 13 is arranged at a height substantially corresponding to the handle 12 on the front side provided on the main body case 2 of FIG. These handles 12 and 13 and a handle 14 described later are used when carrying the heat source side unit 1.

Next, the heat source side unit 1 of FIG. 1 and a plurality of utilization side units 100 connected to the heat source side unit 1.
The refrigerant circuit 60 will be described with reference to FIG.

In FIG. 11, in the refrigerant circuit 60, the heat source side unit 1 and the plurality of use side units 100 are connected to each other by the connecting portion 3.
2 is detachably connected to the support plate 32a of the connecting portion 32, as shown in FIG.
35, 37, 39 and the thick pipe connection parts 34, 36, 38, 4
Has zero. As shown in FIGS. 9 and 11, this support plate 32a
Is detachably connected to the main body case 1a with screws. On one end side (outside) of the support plate 32a, external connection ends 33a, 35a, 37 connected to the liquid pipe LP and the gas pipe GP of the use side heat exchanger 100a of each use side unit 100.
a, 39a, 34a, 36a, 38a, 40a are located. On the other end side (inside) of the support plate 32a, external connection ends 33b, 35b, 37b, 39b, 34b, 36b, 3 connected to the liquid pipe LP and the gas pipe GP of the heat source side unit 1.
8b and 40b are located.

The heat source side unit 1 of FIG. 11 has the following elements and the like, 61 is a compressor, 62 is a four-way valve for switching the flow of refrigerant during cooling / heating, and 63 is heat source side heat exchange. Vessel, 64 is a strainer, 65 is an expansion valve, 66 is a receiver tank, 67 is a muffler, 19a, 19
Reference numeral a is an accumulator, 70 is a capillary tube for liquid injection, 71 is a solenoid valve for hot gas bypass, and 72 is a solenoid valve for liquid injection. The heat source side unit 1 is connected to the plurality of usage side units 100 via the connecting portion 32 using a refrigerant pipe. The connecting portion 32 is housed in the heat source side unit 1.

The refrigerant discharged from the compressor 61 has a solid line arrow (cooling operation), a dotted line arrow (heating operation), and a solid line middle point, depending on the switching position of the four-way valve 62 and the opening / closing of the solenoid valves 71 and 72. As indicated by the arrow (defrosting operation), the flow direction is determined according to the three modes. During the cooling operation, the heat source side heat exchanger 63 functions as a condenser, and the use side heat exchanger 100 of the use side unit functions as an evaporator. During the heating operation, the heat source side heat exchanger 63 functions as an evaporator and the use side unit 100.
The use-side heat exchanger 100a functions as a condenser. During the defrosting operation (during the heating operation), a part of the high-temperature refrigerant from the compressor 61 is directly supplied to the heat source side heat exchanger 63 in order to raise the temperature of the heat source side heat exchanger 63. .

The gas pipe GP on the four-way valve 62 side is provided with a thick pipe side service valve 74 which is a joint portion, and the electric expansion valve 65 side is a joint pipe portion which is a thin pipe side liquid pipe LP service valve. 72 are provided. The service valve 74 on the thick pipe side is connected to the thick pipe connection parts 34, 36, 38,
40, which is detachably connected to the service valve 7 on the thin tube side.
2 is detachably connected to the thin tube connecting portions 33, 35, 37, 39 via the strainers 73, 77, the electric expansion valve 75 and the like. The thick pipe connection parts 34, 36, which are joint parts,
38, 40 and a thin tube connecting portion 33, 3 which is a joint portion.
5, 37 and 39 are detachably connected to each of the use side heat exchangers 100 of the use side unit.

Therefore, when each of the use side units in FIG. 11 is removed from the heat source side unit 1, the thick pipe connection portions 34, 3
6, 38, 40 and the thin tube connecting portions 33, 35, 37, 39 may be removed. Moreover, by removing the connecting portion (joint portion) 32 having a complicated mechanism before and after the electric expansion valve 75 at the service valves 72 and 74, only the connecting portion 32 can be removed from the main body case 1a, and the electric expansion is performed. The valve 75 can be removed together with a part of the refrigerant pipe.

When the connecting portion 32 and the side plate 2 of FIG. 4 are removed, the compressor 61 is exposed in the space of the heat source side unit 1 after removal as shown in FIG. 7, and the compressor 61 passes through the space. It can be removed from the heat source side unit 1.

Next, the grills 7 and 8 in FIG. 1 correspond to the air blowing holes 6b and 6c of the front panel 6a, and a grip 14 is provided on the lower left side of the grill 7 therein. The handle 14 has a bag shape as shown in FIGS. 12 and 13, and is extended so as to be fitted into the mounting opening 6h of the front panel 6a to reinforce the handle 14. Moreover, the handle 14 is provided so as to extend laterally along the horizontal rail 7s of the grill 7.

Next, a method of using this embodiment will be described. First, when carrying the heat source side unit 1 of FIG. 1, two carriers hold hands 12 and 13 respectively to lift them, and another carrier holds hands 14 of the grill 7 to hold them. Can be lifted and carried. Since the handle 14 is provided in the grill 7 and is arranged in parallel with the horizontal crosspiece 7s of the grill 7, it is hardly noticeable in appearance and has a good appearance. The height at which the handle 14 is provided is
Since the heights of the other handles 12 and 13 are almost the same, the carrier can easily carry them. Since the handle 14 is attached so as to fit in the opening 6h of the front panel 6a, the handle 14 can be reinforced and there is no fear of damage, and the hand can be deeply hung when being transported.

As shown in FIG. 7, the handle 13 is provided in the recess 30 and at the upper edge of the connecting portion 32, so that the handle 13 itself does not project outside the main body case 2.

Next, for example, the compressor 61 in the main body case 1
When inspecting, etc., or taking out and performing maintenance, do as follows. That is, the side plate 2 of FIG. 4 is removed, and the connecting plate 32a of the connecting portion 32 of FIG. Thereby, the compressor 61 and the like built in the main body case 1 can be easily removed. Moreover, the connecting portion 32 is arranged in the recess 30 of the main body case 1, and the connecting portion 32 does not project from the main body case 1, so that the main body case 1 is made compact.

Then, as shown in FIG. 11, when disconnecting the main body case 1 and the plurality of utilization side units, in the main body case 1a, the service valve 74 on the thick pipe side and the service valve 72 on the thin pipe side are provided. At the connection portion 32,
In the use side unit 100, the external connection end 3 of each thick pipe
4a, 36a, 38a, 40a and external connection end 3 of each thin tube
It is only necessary to remove the connecting portion 32 at 3a, 35a, 37a, 39a.

In this way, the unit 42 shown in FIGS. 9 and 10 can be removed as it is,
If this is removed, as shown by the dotted line in FIG. 7, the compressor 61 is exposed on the side surface of the main body case 2, and the compressor 62 can be accessed from this side surface side, which makes maintenance extremely easy.

The present invention is not limited to the above-mentioned embodiments, and can be variously modified without departing from the spirit of the "claims".

[0029]

As described above, according to the first aspect of the present invention, a part of the refrigerant pipe including the relatively complicated decompression device before and after the decompression device can be easily removed, and the maintenance performance is improved. improves.

According to the second aspect of the present invention, a part of the refrigerant pipe, which is located before and after the pressure reducing device and includes a plurality of relatively complicated pressure reducing devices, can be easily removed, thereby further improving the maintainability.

According to the third aspect of the present invention, when the compressor is removed from the heat source side unit, the compressor is exposed in the removed space, so that maintenance such as taking out and inspecting the compressor is easy.

In the invention according to claim 4, the support plate can be removed from the heat source side unit together with the pipe extending from the utilization side unit, and the decompression device can be taken out from the outside for maintenance, thus improving workability. To do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a heat source side unit of an air conditioner of the present invention.

FIG. 2 is a plan view of the heat source side unit of FIG.

FIG. 3 is a front view of the heat source side unit of FIG.

FIG. 4 is a side view of the heat source side unit of FIG. 1 having a partial cutaway portion.

FIG. 5 is an exploded perspective view of a heat source side unit.

FIG. 6 is a perspective view showing elements included in the heat source side unit.

FIG. 7 is a perspective view showing a connection portion provided in a recess of the heat source side unit.

FIG. 8 is a front view showing a connection portion provided in a recess of the heat source side unit.

FIG. 9 is a side view showing a connection portion provided in a recess of the heat source side unit.

FIG. 10 is an exploded perspective view showing a connection portion provided in a recess of the heat source side unit.

FIG. 11 is a refrigerant circuit diagram of a heat source side unit and a use side unit.

FIG. 12 is a cross-sectional view showing a handle provided on the grill of the heat source side unit.

FIG. 13 is a view showing an opening for reinforcing a grill and a handle of a heat source side unit.

[Explanation of symbols]

 1 Heat Source Side Unit 12 Front Side Handle 13 Back Side Handle 30 Vertical Recess 32 Liquid Pipe and Gas Pipe Connection 33, 35, 37, 39 Thin Pipe Connection 34, 36, 38, 40 Thick Pipe Connection 72, 74 Service Valve 75 Pressure reducing device 100 User side unit LP liquid pipe GP gas pipe

Claims (4)

[Claims] 1. A heat source side unit equipped with a compressor, a heat source side heat exchanger, and a pressure reducing device, and a usage side unit equipped with a usage side heat exchanger are connected by piping so as to form a refrigeration cycle. In the air conditioner, a first pipe connection port provided in the heat source side unit and connected to the pipe, and a second pipe provided between the pressure reducing device and the heat source side heat exchanger in the refrigeration cycle. An air conditioner comprising a pipe connection port, wherein the decompression device arranged between the first pipe connection port and the second pipe connection port is separable from the refrigeration cycle. . 2. A refrigeration cycle comprising a single heat-source-side unit equipped with a compressor, a heat-source-side heat exchanger, and a plurality of pressure reducing devices, and a plurality of usage-side units equipped with usage-side heat exchangers. In the air conditioner that is connected to the
A plurality of first pipe connection ports provided in the heat source side unit, to which the plurality of pipes are respectively connected, and a plurality of decompression devices provided corresponding to respective use side heat exchangers in the refrigeration cycle. And a single second pipe connection port provided between the heat source side heat exchanger,
An air conditioner, wherein the plurality of decompression devices arranged between the plurality of first pipe connection ports and the second pipe connection ports are configured to be separable from the refrigeration cycle at the same time. 3. A refrigeration cycle comprising a single heat source side unit equipped with a compressor, a heat source side heat exchanger, and a plurality of pressure reducing devices, and a plurality of usage side units equipped with a usage side heat exchanger. In the air conditioner that is connected to the
A support plate detachably attached from the heat source side unit, a plurality of first pipe connection ports provided on the support plate and connected to the plurality of pipes, respectively, and heats on the use side in the refrigeration cycle. A plurality of pressure reducing devices provided corresponding to the exchanger, and a second pipe connection port provided between the heat source side heat exchanger and fixed to the heat source side unit; An air conditioner characterized in that the plurality of decompression devices arranged between the first pipe connection port and the second pipe connection port are configured to be separable from the refrigeration cycle together with the support plate at the same time. 4. An air conditioner in which a heat source side unit and a use side unit are connected by piping so as to form a refrigeration cycle, and a decompression device provided in the heat source side unit and forming a part of the refrigeration cycle. In the refrigeration cycle, a joint provided before and after the decompression device is removed so that the refrigeration cycle can be removed together with a part of the refrigerant pipe.