JPH0625776Y2 - Air conditioner outdoor unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an outdoor unit of a separate type air conditioner, and more specifically, a multi-type outdoor unit capable of connecting a plurality of indoor units in parallel. The present invention relates to an outdoor unit of an air conditioner.

(Prior Art) As a conventional example of an outdoor unit for a multi-type air conditioner as described above, an outdoor unit described in Japanese Utility Model Publication No. 53-41815 can be cited. The outdoor unit is configured as a cooling-only unit, and is connected to the suction side of the compressor 51 and provided with a gas closing valve 56, as shown in the schematic diagram of the refrigerant circuit in FIG. Gas pipe 55 and condenser 52
4 gas branch pipes 57, which are connected to the liquid receiver 54 and the liquid pipe 53 in which the liquid closing valve 58 is interposed.
57, and four liquid branch pipes 60, 60 with solenoid valves 59, ..., 59 interposed therebetween, and flares for connecting communication pipes are provided at the respective tips of these gas branch pipes 57 and liquid branch pipes 60. Joints 61 ... 61 are provided. These flare joints 61 ... 61 and the respective closing valves 56, 58 are fixed to one surface of a casing 62 forming the outer shell of the outdoor unit as shown in FIG. 6, and the respective closing valves 56, 58 are used. The casing 62 performs the refrigerant filling work and inspection work, and the connecting pipe connection work to each flare joint 61.
It can be done from outside.

Further, as shown in FIG. 6 above, each closing valve 56,
The branch piping structure (hereinafter referred to as the inlet / outlet piping assembly) from 58 to the flare joints 61, ..., 61 is collectively provided on the inside of each flare joint 61 fixing surface in the casing 62, and therefore, as described above. In the outdoor unit of the multi-type air conditioner, a dedicated space for housing the above-mentioned inlet / outlet piping assembly is also required.

(Problems to be Solved by the Invention) By the way, in the above, the flare joints 61 on the gas branch pipe 57 side and the liquid branch pipe 60 side are alternately arranged on one surface of the casing 62 in a row. In this case, since a gap necessary for rotating the fastening nut is required between the adjacent flare joints 61, 61 when connecting the connecting pipes, the casing 62 has a large size in the juxtaposed direction.
Therefore, there is a problem that the casing shape becomes large. For this reason, as shown in FIG. 6, the piping in the inlet / outlet piping assembly becomes complicated, and there is a problem that the inlet / outlet piping assembly cannot be made compact.

Further, in the above, the respective closing valves 56, 58 are also attached to the same surface as the flare joint 61 fixed surface, so that the sixth valve
As shown in the figure, it is necessary to provide a piping configuration with a large number of bent parts, which also makes the piping structure more complicated and cannot be made compact.

The present invention has been made in view of the above, and an object thereof is to make the above-mentioned inlet / outlet piping assembly more compact, and as a result, it is possible to miniaturize the outdoor unit, and further connect the connecting pipes and the above-mentioned inlet / outlet. (EN) An outdoor unit of an air conditioner capable of improving workability such as inspection work in a piping assembly.

(Means for Solving the Problem) Therefore, in the outdoor unit for an air conditioner according to the first aspect of the present invention, the compressor 1 and the outdoor heat exchanger 11 are housed in a substantially box-shaped casing 30, and The other end of the gas pipe 6, one end of which is connected to the discharge side or the suction side of the compressor 1, is branched into a plurality of gas branch pipes 18 having a gas side joint 20 at each tip, while the outdoor heat exchange is performed. An outdoor unit of an air conditioner in which the other end of a liquid pipe 12 of which one end is connected to a container 11 is branched into a plurality of liquid branch pipes 17 having a liquid side joint 19 at each tip. A gas-side joint fixing surface 35 on which each gas-side joint 20 is provided in a penetrating state and a liquid-side joint fixing surface 36 on which each liquid-side joint 19 is arranged in a penetrating state are adjacent to each other. The casing 30 is provided with parallel surfaces.

The outdoor unit of the air conditioner according to the second aspect is the first unit described above.
The outdoor unit according to claim 1, wherein the gas side joint fixing surface 3
A gas pipe header 8 having a substantially straight tubular shape is arranged substantially parallel to the gas pipe 5, and a plurality of gas branch pipes 18 extending from each gas side joint 20.
・ While connecting 18 to the gas pipe header 8 respectively,
A gas closing valve 9 is provided on the axis of the gas pipe header 8 to connect the gas closing valve 9 to one end of the gas pipe header 8, and the other end of the gas pipe 6 is connected to the gas closing valve 9. A liquid pipe header 16 having a substantially straight tube shape is disposed in parallel with the liquid side joint fixing surface 36, and a plurality of liquid branch pipes 17 extending from each liquid side joint 19 are connected to the liquid pipe header 1.
6 is provided with a liquid closing valve 15 on the axis of the liquid pipe header 16 to connect the liquid closing valve 15 to one end of the liquid pipe header 16 and the liquid closing valve 1
5, the other end of the liquid pipe 12 is connected, and the casing 3
0 is provided with a closing valve attachment surface 37 for attaching the closing valves 9 and 15 to the surfaces substantially orthogonal to the fixing surfaces 35 and 36 and attaching the respective operation portions thereof to the outside. .

Further, the outdoor unit of the air conditioner according to the third aspect is the second aspect.
In the outdoor unit according to claim 3, each of the fixing surfaces 35, 3 is provided on one surface of the opposite side surfaces of the sub-casing 31 in which a part of the side surface of the casing 30 is projected in a substantially box shape.
6 is formed, the closing valve attachment surface 37 is formed on the upper surface or the lower surface of the sub-casing 31, and the side end surface 39 of the sub-casing 31 and the other of the fixing surfaces 35 and 36 facing each other are formed. Openings are formed in the side surface 38 and the openings are covered with removable lid plates.

(Operation) In the outdoor unit of the air conditioner according to the first aspect,
By arranging the gas-side joint 20 and the liquid-side joint 19 in parallel on the respective fixing surfaces 35 and 36 so that they are in different rows, the dimension in the arranging direction can be made smaller than before, and
By configuring the gas-side inlet / outlet piping assembly formed inside the gas-side joint fixing surface 35 and the liquid-side inlet / outlet piping assembly formed inside the liquid-side joint fixing surface 36 in different regions, It is possible to realize a compact piping configuration in which the length of the piping is as short as possible without causing the complicated state of the piping between them. Then, the above-mentioned gas side joint fixing surface 35
Since the liquid-side joint fixing surface 36 and the liquid-side joint fixing surface 36 are stepped and substantially parallel surfaces, the gas-side joint 2
0 and the liquid side joint 19 can be connected to one of the joints without interfering with the other joint, so that the workability can be improved.

Further, in the outdoor unit for an air conditioner according to the second aspect, a pipe structure in which each gas branch pipe 18 is substantially orthogonal to the gas pipe header 8 and extends linearly to each gas side flare joint 20. And each liquid branch pipe 1
Similarly, 7 can have a linear pipe configuration, and further, the gas closing valve 9 and the liquid closing valve 15 are provided on the respective axial centers of the gas pipe header 8 and the liquid pipe header 16,
Bending connection pipes are not required for the inlet / outlet pipe assembly from each closing valve 9, 15 to each joint 20, 19, and a straight short connecting pipe is interposed, and further, a direct connecting structure is assembled. As a result, the entire structure can be made more compact.

Further, in the outdoor unit for an air conditioner according to the third aspect, the sub-casing 3 surrounding the inlet / outlet piping assembly is provided.
In 1, the joints 19 and 20 and the closing valves 9 and 15 have openings formed on the two surfaces thereof, so that the workable range such as assembly and inspection of the inlet / outlet pipe assembly that can be performed from the outside is widened. This can improve workability.

(Example) Next, a specific example of the outdoor unit of the air conditioner of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a front view of an outdoor unit of an air conditioner according to an embodiment of the present invention configured so that three indoor units can be connected in parallel with each other, and FIG. 3 is a right side view thereof. Is shown. A refrigerant piping system diagram configured in the outdoor unit is shown in FIG. 4. In the figure, reference numeral 1 is a compressor, and a discharge pipe 2 of the compressor 1 and an accumulator 3 are installed. Each of the suction pipes 4 is connected to a four-way switching valve 5, and the four-way switching valve 5 has a first gas pipe 6
And the second gas pipe 7 are connected to each other. The first gas pipe 6
The tip of is connected to the gas pipe header 8 and a gas closing valve 9 is provided midway. On the other hand, the second gas pipe 7 is
It is connected to an outdoor heat exchanger 11 provided with an outdoor fan 10, and a liquid pipe 12 is further connected to the outdoor heat exchanger 11. The liquid pipe 12 is provided with a first electric expansion valve 13, a liquid receiver 14, and a liquid closing valve 15 in this order from the outdoor heat exchanger 11 side, and the tip thereof is the liquid pipe header 1
Connected to 6. The liquid pipe header 16 is connected to the three liquid branch pipes 17, ..., And the gas pipe header 8 is connected to the three gas branch pipes 18 ,.
The liquid side flare joints 19 and 19 and the gas side flare joints 20 and 20, respectively, are provided at the tips of the liquid branch pipe 17 and the gas branch pipe 18, respectively, and between the liquid branch pipe 17 side and the gas branch pipe 18 side. In addition, the indoor units A, B, and C are connected in parallel to each other by the connecting pipes 21 ... 21 so that the simultaneous air conditioning operation of the three chambers is possible. A second electric expansion valve 22 is provided in each of the liquid branch pipes 17, and a switching sound or the like generated at the switching operation of the four-way switching valve 5 is provided in each of the gas branch pipes 18 on the indoor side. The mufflers 23, ... In addition, the above indoor units A, B, C
Each have an indoor heat exchanger 24 and an indoor fan 25 (however, only the indoor unit A is shown).

The casing 30 of the outdoor unit in which the above devices are installed is
As shown in FIG. 2, it is formed in a substantially box shape, and is moved to the left side in FIG. 2 to move the outdoor heat exchanger 11 and the outdoor fan 1 to each other.
0 is arranged, and on the other hand, on the right side, the respective devices such as the compressor 1, the accumulator 3, the four-way switching valve 5, and the liquid receiver 14 are arranged. A substantially box-shaped sub-casing 31 protruding laterally is fixed to the lower wall of the right side wall of the casing 30. The gas closing valve 9 and the liquid closing valve 15 are provided on the lower surface of the sub-casing 31, and as shown in FIG. 3, the flare joints 19 ,.
20 ... 20 are respectively projected and attached, and in the inside of the sub-casing 31, in FIG. 4, the gas closing valve 9 to the gas side flare joint 20 and the liquid closing valve 15 are attached.
From the liquid side flare joint 19 to the gas pipe side piping assembly of the inlet and outlet piping, and the inlet and outlet piping assembly assembled compactly as the liquid pipe side piping assembly, respectively. The configuration is shown.

As shown in the figure, the back surface side of the sub-casing 31 is composed of two vertical surfaces extending in the vertical direction and having steps in the front-back direction, and the vertical surface adjacent to the side surface of the casing 30 is fixed to the gas side joint. Vertical surfaces located on the front side of the casing 30 with respect to the surface 35 and on the side of the gas side joint fixing surface 35 are formed as liquid side joint fixing surfaces 36, respectively. Surface 3
5, the gas-side flare joints 20 are fixed to the liquid-side joint fixing surface 36, and the liquid-side flare joints 19 are fixed to the liquid-side joint fixing surface 36 in a vertically aligned vertical direction with the connecting pipe connection portions located outside. Has been done. Therefore, compared with the conventional case where both the gas-side joint and the liquid-side joint are installed side by side in the same row,
The vertical size of the sub-casing 31 is about half. Further, when connecting the connecting pipes, first, the connecting work to the gas side flare joint 20 side is performed. At this time, since the liquid-side joint fixing surface 36 is located on the front side of the gas-side joint fixing surface 35, the liquid-side flare joint 19 is also positioned on the front side of the flare nut fastening operation surface of the gas-side flare joint 20. Since it is located, connection work can be performed without being interfered by the liquid side flare joint 19. Then, the connection work to the liquid-side flare joint 19 is performed, so that the connection work can be easily performed without mutual interference between the gas-side and liquid-side joints.

The inner ends of the liquid-side flare joints 19 are integrally connected to the tips of the second electric expansion valves 22. These second electric expansion valves 22 have a structure having an L-shaped internal flow path, and are provided in the middle of a valve body 22b extending coaxially with the liquid side flare joint 19 toward the electromagnetic coil portion 22a.
The valve body 22b has a branch pipe 22c orthogonal to each branch pipe 22c.
c is a straight tubular liquid pipe header 1 arranged vertically.
6 are connected respectively. And this liquid pipe header 1
A liquid closing valve 15 is directly connected to the lower end of 6. The operation portion of the liquid shutoff valve 15 includes the lower surface of the sub casing 31 and
In other words, the stop valve attachment surface 37 is penetrated to be positioned below the sub casing 31. The tip of the liquid pipe 12 is connected to the liquid shutoff valve 15, and the liquid pipe 12 extends inward of the casing 30 to form the liquid pipe-side piping assembly.

On the other hand, the inner ends of the gas-side flare joints 20 are directly connected to one ends of mufflers 23 arranged substantially horizontally. Each of these mufflers 23 is made up of a cylindrical member having hemispherical end faces, and an inlet / outlet port having a diameter smaller than that of the cylindrical portion is formed at the axial center position of both end faces. One of the inlet / outlet ports is directly connected to the inner end of the gas side flare joint 20. Each of the other ports of the muffler 23 is connected to the straight tubular gas pipe header 8 arranged in the vertical direction via a short connecting pipe. A gas closing valve 9 whose operation portion is located below the sub-casing 31 and which penetrates the closing valve attachment surface 37 is directly connected to the lower end of the gas pipe header 8, and the gas closing valve 9 is connected to the casing. Thirty
The first gas pipe 6 extending from the inside is connected to form a gas pipe side piping assembly.

As described above, the gas-side inlet / outlet piping assembly and the liquid-side inlet / outlet piping assembly are formed in mutually different regions that are orthogonal to the gas-side joint fixing surface 35 and the liquid-side joint fixing surface 36, respectively. Therefore, it is possible to realize a compact piping configuration in which the length of the piping is as short as possible. Furthermore, both of them have a vertical / horizontal straight pipe configuration, so that a straight short connecting pipe is used for connection without using a bent connecting pipe, and further a direct connection is made. This is done, and the whole is made more compact.

In the sub casing 31, the front vertical surface 3
8 and the side end surface 39 parallel to the side surface of the casing 30 serve as a service surface when inspecting the inlet / outlet pipe assembly. That is, openings are formed on these surfaces 38, 39, leaving the peripheral edge portions, and these openings are normally covered with a removable cover plate (not shown). Since the closing valve attachment surface 37 is formed on the lower surface of the sub-casing 31 that surrounds the inlet / outlet piping assembly, the front end vertical surface 38 as well as the side end surface 39 can be configured as a service surface. As a result, the workable range such as assembly and inspection of the inlet / outlet pipe assembly that can be performed from the outside is widened, and the workability is further improved. The second
When the electromagnetic coil portion 22a of the electric expansion valve 22 is replaced, a space for attaching and detaching the electromagnetic coil portion 22a from the valve body 22b is required on the front side of the position where the second electric expansion valve 22 is disposed. However, as described above, the front side vertical surface 38
As a result of the opening being formed in the sub-casing 31, the above-mentioned space is not required in the space surrounded by the sub-casing 31, which makes it possible to make the casing shape smaller.

Although one embodiment of the present invention has been described above, the above embodiment is not intended to limit the present invention and various modifications can be made within the scope of the present invention, for example, the closing valve attachment surface 37.
Can be formed on the upper surface of the sub-casing 31, and the gas-side joint fixing surface 35, the liquid-side joint fixing surface 36, and the closing valve mounting surface 37 are formed on the corner portion of the casing that surrounds the entire outdoor unit. This is the first and second aspects of this invention
It is possible within the scope of the claims. Further, although the outdoor unit for three-room air conditioning has been described as an example in the above embodiment, the present invention can be applied to an outdoor unit for multi-room air conditioning having two or four or more rooms.

(Advantage of the Invention) As described above, in the outdoor unit for an air conditioner according to the first aspect of the present invention, the gas-side joint and the liquid-side joint are arranged in different rows from each other. Since the dimension in the direction can be made smaller than before, the piping between the inlet / outlet piping assembly on the gas side and the inlet / outlet piping assembly on the liquid side will not be complicated, and the piping length can be shortened as much as possible. The entire structure can be made more compact than before. Furthermore, by fixing the gas-side joint and the liquid-side joint respectively to the parallel surfaces having different steps, it is possible to perform connection to one of the respective joints without interfering with the other joint during connection work of the connecting pipe. Therefore, it is possible to improve the workability.

In the outdoor unit for an air conditioner according to the second aspect, each gas branch pipe and each liquid branch pipe are respectively connected to a gas pipe header,
A linear piping configuration that is substantially orthogonal to the liquid pipe header can be provided, and since the gas closing valve and the liquid closing valve are also linearly connected to the respective ends of the gas pipe header and the liquid pipe header, a short linear shape is required. It is possible to assemble with a structure in which a connecting pipe is interposed and further with a structure in which it is directly connected, and as a result, it is possible to make the entire structure more compact.

Further, in the outdoor unit for an air conditioner according to the third aspect, since the openings are respectively formed on the two surfaces of the substantially box-shaped sub-casing that surrounds the inlet / outlet piping assembly, the inlet / outlet piping can be performed from the outside. Since the workable range of assembly and inspection of the assembly is widened, the workability thereof can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of the outdoor unit of an air conditioner according to an embodiment of the present invention, with a part of the outdoor unit cut away, FIG. 2 is a front view of the outdoor unit, and FIG. 3 is a right side of the outdoor unit. FIG. 4 is a system diagram of a refrigerant circuit formed inside the outdoor unit,
FIG. 5 is a schematic system diagram of a refrigerant circuit configured inside an outdoor unit in a conventional apparatus, and FIG. 6 is a side view showing a structure of an inlet / outlet piping assembly in the conventional apparatus. 1 ... Compressor, 6 ... First gas pipe, 8 ... Gas pipe header, 9 ... Gas closing valve, 11 ... Outdoor heat exchanger, 12 ...
… Liquid pipe, 15 …… Liquid shutoff valve, 16 …… Liquid pipe header, 17
... Liquid branch pipe, 18 ... Gas branch pipe, 19 ... Liquid side flare joint, 20 ... Gas side flare joint, 30 ... Casing,
31 ... Sub casing, 35 ... Gas side joint fixing surface,
36: Liquid side joint fixed surface, 37: Closed valve mounting surface, 38
…… Front side vertical surface, 39 …… side end surface.

Claims (3)

[Scope of utility model registration request] 1. A compressor (1) and an outdoor heat exchanger (11) are housed in a substantially box-shaped casing (30), and one end thereof is connected to a discharge side or a suction side of the compressor (1). The other end of the gas pipe (6) is a plurality of gas branch pipes having gas side joints (20) at each tip.
(18) ... While branching to (18), the other end of the liquid pipe (12) whose one end is connected to the outdoor heat exchanger (11) has a plurality of liquid side joints (19) at each tip. An air conditioner outdoor unit formed by branching to the liquid branch pipe (17)
Gas side joint fixing surface (35), which are installed side by side in parallel with each other
And the liquid side joints (19) are provided in the casing (30) in substantially parallel planes with adjacent liquid side joint fixing surfaces (36) that are juxtaposed in a penetrating state. An outdoor unit for an air conditioner. 2. A plurality of gas branch pipes (18) extending from each gas side joint (20), with a substantially straight tube-shaped gas pipe header (8) being arranged substantially parallel to the gas side joint fixing surface (35). .. (18) are connected to the gas pipe headers (8) respectively, while a gas shutoff valve (9) is provided on the axis of the gas pipe header (8), and the gas shutoff valve (9) is used for the gas shutoff It is connected to one end of the pipe header (8), the other end of the gas pipe (6) is connected to the gas shutoff valve (9), and is substantially straight in parallel to the liquid side joint fixing surface (36). A liquid pipe header (16) having a tubular shape is arranged, and a plurality of liquid branch pipes (17) ... (17) extending from each liquid side joint (19) are connected to the liquid pipe header (16).
While each of the liquid pipe header (16) is connected to one end side of the liquid pipe header (16) by providing a liquid closing valve (15) on the axis of the liquid pipe header (16). Liquid shutoff valve (15)
Connect the other end of the liquid pipe (12) to the casing (30)
On the surface substantially orthogonal to the fixing surfaces (35) and (36), the closing valves (9) and (15) are attached to the closing valves by attaching their respective operating parts to the outside. The outdoor unit for an air conditioner according to claim 1, further comprising (37). 3. The fixing surfaces (35) (36) are formed on one surface of opposite side surfaces of a sub-casing (31) in which a part of the side surface of the casing (30) is projected in a substantially box shape. In addition, the closing valve attachment surface (37) is formed on the upper surface or the lower surface of the sub casing (31), and the sub casing (31) is further formed.
A side end face (39) and a side face (38) facing the fixing faces (35) and (36) are formed with openings, and these openings are covered with removable lid plates. The outdoor unit for an air conditioner according to claim 2, wherein