JPS632867Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a cooling device using a rotary compressor.

(b) Prior art The conventional structure will be explained with reference to FIGS. 1 and 2.
FIG. 1 shows a general refrigerator 1. As shown in FIG. Refrigerator 1
A heat insulating material is filled between an outer box 2 made of a steel plate and an inner box (not shown) to form two upper and lower storage compartments that are open to the front, and the openings are closed with door bodies 3A and 3B so as to be openable and closed. There is. A machine room 4 is formed below a storage room (not shown) in the lower part of the refrigerator 1 and is surrounded by an outer box 2 at the periphery and above, and an air intake port 5 and an air discharge port 6 are arranged in parallel on the front surface of the machine room 4. Ru.

FIG. 2 shows a plan view of a conventional machine room 4. As shown in FIG. Inside the machine room 4, a right chamber 4a having an inlet 5 and a left chamber 4b having an outlet 6 are formed by a partition plate 7 to prevent a short circuit of circulating air. Both chambers 4 are connected to the partition plate 7 located at the back of the machine room 4.
A window hole 8 communicating between a and 4b is bored, and a blower 10 operated by a motor 9 is installed corresponding to the window hole 8. The blower 10 rotates and blows the left ventricle 4.
Air is discharged in direction b, and a condenser 11 included in the refrigeration cycle is installed on the discharge side of the blower 10 in the left chamber 4b, and an electric compressor 12 is installed on the leeward side of the condenser 11. Also, near the discharge port 6 is an evaporation pipe 13 which is also included in the refrigeration cycle.
An evaporation tray 14 for defrosting water of a cooler (not shown) is placed on the evaporation pipe 13. With this configuration, when the blower 10 is rotated, air is circulated within the machine room 4 as indicated by the dotted line arrow in FIG. That is, the air sucked through the suction port 5 is blown onto the condenser 11 through the window hole 8, cools the condenser 11, cools the compressor 12, and finally flows through the evaporation pipe 1.
3 and is discharged from the discharge port 6. This facilitates cooling of the high temperature refrigerant in the condenser 11 through the evaporation pipe 13, thereby improving cooling efficiency.

Here, a reciprocating type compressor has conventionally been used as the electric compressor 12, but since this reciprocating compressor is large in size relative to its capacity, it is necessary to increase the volume of the machine room 4 in which it is installed. This has the drawback of reducing the internal volume of the refrigerator and expanding the installation space of the refrigerator 1. Therefore, in recent years, rotary compressors, whose capacity has been improved due to technological innovation, have come to be used. Since this rotary compressor is small, it is possible to reduce the volume of the machine room 4, thereby simultaneously increasing the internal volume and reducing the installation space of the refrigerator 1. Since the pressure becomes high, if the compressor 12 is cooled by the blower 10, a large amount of refrigerant will dissolve into the lubricating oil when the compressor 12 is stopped. Here, the higher the pressure and the lower the temperature of the refrigerant, the more easily it dissolves in the lubricating oil, which has the drawback of causing a shortage of refrigerant when the compressor 12 is restarted.

(c) Purpose of the invention The object of the invention is to provide a cooling system using a rotary compressor that reduces the amount of refrigerant dissolved into lubricating oil when the compressor is stopped.

(d) Structure of the device The present invention is a cooling system in which a rotary compressor, a condenser, and a blower are installed in a machine room, and air sucked in from outside the machine room by the blower is forced into the condenser. A shielding plate is provided near the compressor to prevent air from the blower from hitting the compressor, thereby preventing cooling of the compressor.

(E) Example An example of the present invention will be explained with reference to FIG. or,
The refrigerator 1 shown in FIG. 1 is used as the refrigerator, and FIG. 3 is a plan view of a machine room 4 to which the present invention is applied.
Components in FIG. 3 having the same reference numerals as those in FIG. 2 are assumed to be the same items or have the same functions, and their explanation will be omitted. In Fig. 3, 20 is a partition plate;
The inner part of the inclined part 20a protrudes toward the left ventricle 4b.
A window hole 8 is formed in this inclined portion 20a, and a blower 10 is provided corresponding to this window hole 8. Therefore, the blower 10 is installed inclined in the direction of the discharge port 6, and the condenser 11 is installed in the air discharge direction. Further, the evaporation pipe 13 is provided near the discharge port 6 as in FIG.

21 is a rotary compressor, and the compressor 21 is installed at a position away from the partition plate 20 in the inner part of the left ventricle 4b. A shielding plate 22 is provided in front of the compressor 21 to completely isolate the compressor 21 from the rest of the left ventricle 4b. If the blower 10 is operated in this state, air will circulate within the machine room 4 as indicated by the dotted line arrow in FIG. That is, the air sucked from the suction port is sent to the blower 10.
It is discharged to the condenser 11 to cool the condenser 11, hits the shielding plate 22, flows forward, cools the evaporation pipe 13, and is discharged from the discharge port 6. The shielding plate 22 is formed with an inclined surface 22a oriented in the discharge direction of the blower 10, thereby improving air circulation.

(f) Effects of the invention According to the invention, the condenser installed in the machine room is forcibly cooled by the blower, so the high temperature refrigerant discharged from the rotary compressor is cooled and condensed well, increasing the cooling efficiency. improves. In addition, by preventing the rotary compressor from being cooled by the air circulated by the blower, the amount of refrigerant that dissolves into the lubricating oil when the compressor is stopped is reduced, eliminating the refrigerant shortage when the compressor is started, and reducing the amount of lubricating oil. Since the increase in viscosity due to cooling can be suppressed, the startup load can be reduced. Furthermore, the inclined surface formed on the shielding plate allows the air flow to be smoothly sent to the condenser, thereby enhancing the cooling effect of the condenser.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a refrigerator, FIG. 2 is a plan view of a conventional machine room, and FIG. 3 is a plan view of a machine room to which the present invention is applied. 4... Machine room, 5... Air intake port, 10... Blower, 11... Condenser, 21... Rotary compressor, 22... Shielding plate.

Claims (1)

[Scope of utility model claims] A rotary compressor, a condenser, and a blower included in a refrigeration cycle are installed in a machine room, and an air inlet is formed in the machine room, and air sucked from the inlet is forced into the condenser by the blower. In the cooling device configured to vent the air to the outside of the machine room after ventilation, the rotary compressor is located near the rotary compressor, isolating the compressor from the air flow circulated by the blower, and oriented in the discharge direction of the air flow. A cooling device characterized by being provided with a shielding plate having an inclined surface.