JPS6233408B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vapor compression refrigerator using a compressor driven by a heat engine such as an engine.

In addition to functioning as a refrigerator, the heat engine-driven refrigerator can also utilize the exhaust heat of the heat engine for heating hot water and the like. Therefore, if the refrigerator is also used as a heat pump, there will be a large energy saving effect during the heating cycle.

However, this refrigerator has one major drawback as described below. In other words, it is difficult to cool the heat engine during the cooling cycle. For example, if the heat engine is an engine, it is necessary to cool the engine jacket, but it is also necessary to cool the heat radiated from the engine body. Normally, jacket cooling is performed by cooling the cooling water with an air-cooled cooling water cooler, and cooling of the heat radiated from the engine body is performed by ventilating the air around the engine with a ventilation fan, so these two cooling systems and fans are required. It is. Especially when the engine is installed in a machine room, having two cooling air systems not only requires two blowers, but also requires two suction ducts and two discharge ducts. In this case, two sets of suction silencer and discharge silencer are required.

1 and 2 are flow sheets of a conventional engine cooling system for an engine-driven refrigerator.

FIG. 1 shows a case where the building is composed of two units, an outdoor unit 1 and an indoor unit 2, separated by an outer wall 30, and a soundproof cover 3 is installed on the indoor unit 2. The jacket of the engine 9 that drives the compressor 10 is cooled by a jacket cooling water cooler 4 that cools the jacket cooling water. That is, the air blower 5 blows air into the duct 6 from outside.
is used to send outside air to the jacket cooling water cooler 4 for cooling. Engine box 7 inside soundproof cover 3
Ventilation is performed by a ventilation fan 8. Normally, a suction duct 28 is provided between the outer wall 30 of the building and the soundproof cover 3 with a built-in silencer 13, and a discharge duct 29 is provided between the soundproof cover 3 and the discharge port 27 provided in the outer wall 30 of the building. Silencer 14
provided through.

Note that the refrigerant driven by the engine 9 and sent out from the compressor 10 is condensed in the outside air side heat exchanger 11 of the outdoor unit 1, and evaporated in the load side heat exchanger 12 by cooling the load such as cold water, and then re-evaporated. It is sucked into the compressor 10.

Note that FIG. 2 shows the case where the soundproof cover is omitted and the machine room is used as a chamber. In Figure 2, the first
Devices with the same symbols as in the figure are the same. Although the soundproof cover in the case of FIG. 1 is not necessary, the noise inside the machine room is large and it is not practical.

The disadvantage of the conventional method shown in Figure 1 is that the blowers are numbered 5 and 8.
In addition, two sets of discharge ducts and suction ducts are required, making the device extremely complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a heat engine-driven refrigerator which eliminates the above-mentioned drawbacks of refrigerators driven by a heat engine.

The present invention will be explained with reference to the drawings based on examples.

FIG. 3 is a layout diagram. In FIG. 3, the refrigerator is divided into two units, an outdoor unit 1 and an indoor unit 2, separated by an outer wall 30 of the building as in FIG. 1. The refrigeration cycle is the same as a normal refrigerator. That is, the refrigerant gas compressed by the compressor 10 driven by the engine 9 is cooled and condensed by the outside air in the outside air side heat exchanger 11.
It is depressurized by the expansion valve 15, heated with a load fluid such as cold water in the load-side heat exchanger 12, and evaporated. Conversely, a load fluid such as cold water is cooled. The evaporated refrigerant gas is sucked into the compressor 10 again.

An outside air intake louver 17 is provided in the indoor unit installation space 16 to take outside air into the room. The indoor unit 2 is covered with a soundproof cover 3. Engine 9 and compressor 1
0 side, blower 5 and jacket cooling water cooler 4
There is a partition 18 on the side that serves as a soundproof wall.
Both sides of the partition 18 are insulated against noise.

The jacket of the engine 9 is cooled by cooling water that cools the jacket, and this cooling water is cooled by a jacket cooling water that is connected to the engine jacket by piping (not shown) so as to circulate between the jacket and the engine jacket. In the container 4, this is carried out using outside air. This outside air is supplied by a blower 5 in a duct between a suction chamber 19 opening into the indoor unit installation space 16 and a discharge port 21 on the outside of the building, from the louver 17 to the indoor unit installation space 16 to the suction chamber 19 to the jacket cooling water cooler 4. →Blower 5
→Discharge duct 20→Discharge port 21.

In addition, ventilation inside engine box 7 is provided by louver 1.
7 → Indoor unit installation space 16 → Intake silencer 22 → Engine box 7 → Discharge silencer 23 → Blower suction chamber 24 → Blower 5 → Discharge duct 20 → Discharge port 21, and the flow is the same as that of the jacket cooling water cooler 4. 5. Ventilation within the indoor unit installation space 16 will also be performed using the same blower.

As is clear from the above description, the silencer 23 only needs to be provided in the air passage between the engine box 7 and the suction side of the blower 5, and its position is not limited. As shown in FIG. 3, the silencer 23 in the air passage between the blower 5, the jacket cooling water cooler 4, the engine box 7, and the blower 5 is connected by a connecting duct 34 having three connecting parts 31, 32, and 33. There is. The heated air passing through the jacket cooling water cooler 4 and the engine box 7 gathers in the blower suction chamber 24 and is sucked in by the blower 5. Since each device is cooled by fresh outside air, it has a sufficient cooling effect as in the conventional example.

The intake silencer 22 is provided in the engine box 7 integrally with the soundproof cover 3, and does not require any duct at all.

Note that the discharge part of the blower 5 is a discharge chamber 25.
For example, a heat recovery device from the exhaust gas of the engine 9 and auxiliary equipment for the compressor 10 (such as an oil separator and an oil cooler) are installed in this part. Of course, these devices may be installed within the blower suction chamber 24. Depending on the case, it may be installed in the suction chamber 19, or it may be installed in a space that has the same temperature conditions as the indoor unit installation space 16. Incidentally, the combustion gas exhaust from the engine 9 is discharged outdoors from the exhaust pipe 26. Moreover, when the noise of the blower 5 is large, a silencer is installed in the suction chamber 19 and the discharge duct 20 section.

Since the present invention has the above-described structure, it has the following excellent effects.

(1) In the heat engine driven refrigerator shown in Fig. 1, the ventilation fan 8 is no longer necessary, and the number of blowers is halved.

(2) Similarly, the discharge duct 29 and discharge port 27 are no longer necessary, and space in the machine room can be saved.

(3) Since the intake silencer 22 of the air intake part for ventilating the interior of the soundproof cover is provided integrally with the soundproof cover, the ducts 6 and 28 shown in FIG. 1 are no longer necessary in the heat engine driven refrigerator.

(4) Moreover, since the noise inside the machine room is reduced by the soundproof cover 3 and the silencers 22 and 23, there are no inconveniences like the heat engine driven refrigerator shown in FIG. 2.

[Brief explanation of the drawing]

1 and 2 are layout diagrams of a conventional heat engine driven refrigerator, respectively, and FIG. 3 is a layout diagram of an embodiment of the present invention. 1...Outdoor unit, 2...Indoor unit, 3
... Soundproof cover, 4 ... Jacket cooling water cooler, 5 ... Blower, 6 ... Duct, 7 ... Engine box, 8 ... Ventilation fan, 9 ... Engine, 10 ... Compressor, 11 ... outside air side heat exchanger,
12... Load side heat exchanger, 13, 14... Silencer, 15... Expansion valve, 16... Indoor unit installation space, 17... Outside air intake louver, 18
...Inner partition, 19...Suction chamber, 20...Discharge duct, 21...Discharge port, 22...Suction silencer, 23...Discharge silencer, 24...Blower suction chamber, 25...Discharge chamber, 26...
...Exhaust pipe, 27...Discharge port, 28...Suction duct, 29...Discharge duct, 30...Outer wall, 31,
32, 33...connection section, 34...connection duct.

Claims (1)

[Claims] 1 A refrigerator that is installed in a soundproof building and driven by a heat engine surrounded by a soundproof cover, where the heat engine itself is cooled by the outside air outside the soundproof building, and the outside air that has cooled the heat engine is passed through a duct from the soundproof cover. In a soundproofing system for a heat engine-driven refrigerator that discharges air to the outside of the soundproof building through It is cooled by outside air taken in from the outside air intake louver by a blower driven by the prime mover, and the soundproof cover has an inlet that takes in outside air from the outside air intake louver, and ventilation inside the soundproof box is provided by the cooling heat medium cooler. A soundproofing device for a heat engine-driven refrigerator in which a cooling blower is used and a silencer is inserted into the inlet of the soundproofing cover and the air passage between the soundproofing cover and the blower.