JPH0429342Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a heat exchange unit housing compressors or heat exchangers constituting a plurality of refrigeration cycles.

(b) Prior Art A conventional example of the structure of this type of heat exchange unit is the one shown in Japanese Patent Application No. 1987-97027.

According to this content, a plurality of compressors are built into the unit, and the refrigerant pipes connected to the compressors are separated as much as possible so that they do not come into contact with each other.

(c) Problems to be solved by the invention In such a heat exchange unit, the refrigerant piping must be separated from each other, which has the disadvantage that the unit becomes large. In addition, because the refrigerant piping is located far apart, small parts such as the capillary tube dehydrator connected to this piping are scattered throughout the unit, making it difficult to organize the equipment such as electrical parts. I couldn't secure space.

The purpose of the present invention is to reduce the size of the heat exchange unit and to secure a large amount of space within the unit for arranging equipment such as electrical components.

(d) Means for solving the problem The present invention is to combine the pressure reducing device of one refrigeration cycle and the pressure reducing device of the other refrigeration cycle by tightening them together with a fixture in advance, and then attaching them to each heat exchanger. It is designed so that it can be connected to and housed in a single box.

(e) Function Since the pressure reducing device of one refrigeration cycle and the pressure reducing device of the other refrigeration cycle are fastened together in advance with fixtures and put together as one block, the weight of this block is equal to that of the individual pressure reducing devices. This block absorbs the vibrations that occur when each refrigeration cycle is operated individually or simultaneously, keeping the vibrations to a minimum. Furthermore, by grouping the decompression devices together in advance, a compact space can be secured within the box, and electrical components and the like can be stored in this space.

(f) Example In the drawings, 1 is an outdoor unit, 2a, 2b
are indoor units, which are connected by inter-unit piping 3 to form an air conditioner.

The outdoor unit 1 has built-in compressors 4a, 4b, accumulators 5a, 5b, four-way valves 6a, 6b, and an outdoor heat exchanger 7.
4b and four-way valve 6a, 6b and accumulator 5a,
5b is connected with piping.

This outdoor heat exchanger 7 acts as a condenser during cooling, and acts as an evaporator during heating. Two channels 8a and 8b are formed in this heat exchanger, and one end 9a of one channel 8a is connected to a four-way valve 6a.
One end 9b of the other flow path 8b is connected to the four-way valve 6b, respectively. 10a, 10b are the other ends 11 of the two refrigerant channels 8a, 8b of the outdoor heat exchanger 7.
The pipes are connected to the pipes a and 11b, and these pipes are integrated by brazing. 12a and 12b are pressure reducing devices, which connect a heating capillary tube 13, a first capillary tube 14, and a second capillary tube 15 in series, and connect a back check in parallel with this heating capillary tube 13. A valve 16 and a dehydrator 17 are connected.
This check valve 16 opens during cooling and closes during heating. 18a, 18b are compressors 4a,
4b, the inlet end 19 is connected to the first pressure reducer 14 and the second pressure reducer 1.
5. 20a and 20b are strainers. 21a and 21b are four-way valves 6
The three-way valves 22a and 22b connected to the three-way valves a and 6b are two-way valves connected to the pressure reducing devices 12a and 12b, and one end of the inter-unit piping 3 is connected to these valves.

Figure 2 shows the part surrounded by the dashed line in Figure 1 (2
This figure shows the state of the piping of two pressure reducing devices) 23, which are assembled in the form of a block (such a combination is hereinafter referred to as a block). 24a is the inlet side pipe of one check valve 16a, and this pipe 24a
Check valve 16a and day hydrator 17 are located lower below.
a is connected, and further connected to the first and second capillary tubes 14 and 15 via a U-shaped tube 25a. The second capillary tube 15 is a pipe 26a connected to one two-way valve 22a.
It is connected to the. This piping 26a is covered with a protective tube 27. Note that the heating capillary tube 13 is connected in parallel with the check valve 16a.
is not visible in FIG. 2 because it is hidden behind the check valve 16a. 24b is an inlet side pipe of the other check valve 16b, and the other check valve 16 is connected below this pipe 24b.
b, the day hydrator 17b is connected,
Furthermore, it is connected to the first and second capillary tubes 14 and 15 via a U-shaped tube 25b. This U-shaped tube 25b is covered with a protective tube 28. The second capillary tube 15 is connected to a strainer 20b, and this strainer 20b
is connected to the inlet side pipe 26b of the other check valve 22b. The liquid injection pipe 18a of one compressor 4a is connected to the side of the block 23, and the liquid injection pipe 18a of the other compressor 4b is
b extend above the blocks 23, respectively. 2
9, 30, 31 are thus connected to the day hydrators 17a, 17b, check valves 16a, 16b, strainer 20b, capillary tubes 13, 14,
15 etc. are fastened together in advance to form one block 23, and the fixture 29 is used to connect check valves 16a, 16b.
The protection tube 27 is wound around the outer periphery of the covered pipe 26a and the strainer 20b. The fixture 30 is wound around the outer periphery of one liquid injection tube 18a, the lower part of the dehydrator 17a, and the piping 25b covered with the protective tube 28. 31 is a fixture made of thin sheet metal that can be easily bent by hand.

The block 23, in which the small parts of the refrigeration parts are fastened together in advance, is placed in the front part of the machine room 33 of the outdoor unit 1, as shown in FIG. Piping 26 to vessel 7
a, 26b are fixed to the valve stand 34.
2a and 22b (not shown in FIG. 3), respectively. These piping comrades 24a, 24b, 26
These pipes extend from the block 23 so that the distances between a and 26b are approximately equal to each other. In this way, the block 23 is placed in the front part of the machine room 33, the U-shaped tube 25a and the liquid injection tube 18b are covered with the fixture 31 brazed to the unit bottom plate 32, and the block 23 is attached to the bottom plate. 32
Fixed to. 35 connects the outdoor unit 1 to the machine room 33
A partition plate 37 is a fan disposed in the heat exchange chamber 36.

Indoor heat exchangers 38a and 38b are built into the indoor units 2a and 2b, respectively, and act as evaporators during cooling and as condensers during heating.

Compressor 4 of outdoor unit 1 configured in this way
When compressors a and 4b are operated, these compressors 4a and 4b
Although vibration is generated from the four-way valve 6, this vibration
This vibration is mostly absorbed by the piping from a and 6b to the outdoor heat exchanger 7, and rarely reaches the piping inside the block 23.

Moreover, since the weight of the block 23 formed in this way is heavier than the weight of one decompression device 12a, 12b alone, the above-mentioned vibration is caused by the block 23.
Even if the vibration reaches the piping, this block 23 can suppress this vibration.

(g) Effects of the invention The invention is based on a method in which the pressure reducing device of one refrigeration cycle and the pressure reducing device of the other refrigeration cycle are fastened together in advance with a fixture to form one block, and this block is connected to a heat exchanger. Therefore, a large amount of space can be secured inside the box. Therefore, electrical components and the like can be placed in this space, thereby making it possible to downsize the unit. Furthermore, since a plurality of pressure reducing devices are grouped together, the assembly work of the unit can be facilitated.

Furthermore, since the weight of the above-mentioned block is heavier than the weight of each pressure reducing device, even if vibrations are transmitted to this block, the vibrations are absorbed by this block and can be suppressed to a small level.

[Brief explanation of the drawing]

The drawings show one embodiment of the heat exchange unit of the present invention. Figure 1 is a refrigerant circuit diagram of the unit, and Figure 2 is an assembly of small parts such as a pressure reducing device and a dehydrator built into the unit. FIG. 3 is a front view showing the state; FIG. 3 is a plan view of the same unit. 1...Outdoor unit, 7...Outdoor heat exchanger, 1
2a, 12b... pressure reducing device, 29, 30... fixture.

Claims (1)

[Scope of utility model registration request] Consists of multiple independent refrigeration cycles,
A heat exchanger that forms part of each refrigeration cycle,
In a heat exchange unit in which a pressure reducing device is housed in one box, the pressure reducing device of one refrigeration cycle and the pressure reducing device of the other refrigeration cycle are fastened together with a fixture in advance and connected to the heat exchanger. A heat exchange unit featuring: