JPS5986883A - Preventive device for dew condensation of refrigerator, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications Regarding.

Conventional configurations and their problemsRecently, rotary compressors with rotary motion have replaced reciprocating compressors in small refrigeration equipment such as refrigerators, and their high efficiency contributes to energy savings in refrigeration equipment. 9 groups of people have started to be established. However, during operation of a rotary compressor, the inside of the shell is kept at a high pressure by the discharged refrigerant, so a large amount of the refrigerant in the system dissolves in the refrigerating machine oil in the shell, so the amount of refrigerant circulating in the refrigeration system tends to be insufficient. Become. The amount of this refrigerant dissolved is also affected by the temperature of the refrigerating machine oil, and the lower the temperature, the more it dissolves. Therefore, the amount of refrigerant in the refrigeration system is sealed in multiple ports so that there is no shortage of refrigerant even at low temperatures.

Therefore, when the outside temperature is high, the amount of circulating gas inside the refrigeration system is slightly larger, so the suction pipe becomes colder than a refrigeration system using a reciprocating compressor, and condensation is more likely to occur. Conventionally, as shown in FIG. 1, a trap B is provided on the suction pipe A, as in the case of a reciprocating compressor, so that the water condensed on the surface of the suction pipe is drained onto the mounting base C of the compressor D. As mentioned above, in a refrigeration system using a reciprocating compressor, there was little variation in the amount of circulating gas due to differences in outside air temperature, and the amount of condensed water was also small. However, in a refrigeration system using a rotary compressor, there are problems in that a large amount of water condenses due to changes in outside air temperature, and that corrosion of the mounting base C and corrosion of piping cause refrigerant gas leaks.

OBJECTS OF THE INVENTION The object of the present invention is to increase the temperature of the suction pipe so that dew condensation is less likely to occur, and to evaporate the condensation in a hot pan in the case of condensation.

Structure of the Invention In order to achieve this object, the outer shape of the muffler installed in the middle of the pre-cooling heat dissipation pipe for the discharged gas is formed into a dish shape, and the muffler is installed in the muffler to allow condensed water to drip onto the surface of the suction pipe. The suction pipe is heated by the high-temperature muffler, making it difficult for condensation to form, and even if condensation does occur, the water is caught by the muffler and quickly evaporates.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 6.

In FIG. 2, 1 is a refrigeration system, 2 is a rotary compressor, 3 is a condenser, and 4 is an evaporator. Rotary compressor 2
The high-temperature, high-pressure gas discharged to the pre-cooling pipe 5a from the pre-cooling pipe 5a enters the muffler 6 without being heat-radiated, reducing piping resonance due to pressure pulsations at the time of discharge from the compressor 2, and after dissipating the heat in the pre-cooling pipe 5b, it enters the shell of the rotary compressor 2 again. After being discharged in a gaseous state and passing through the shell, it returns to the rotary compressor 2 from the discharge pipe 7 through the condenser 3, capillary tube 8, evaporator 4, and suction pipe 9. In this refrigeration cycle, a muffler 6 is positioned above the rotary compressor 2 as shown in FIG. 3, and a suction pipe 9 is installed above the muffler 6. Further, FIG. 4 is a detailed diagram showing the arrangement relationship of the muffler 6 and suction pipe 9. The upper surface 6a of the muffler 6 is formed into a dish shape, and the suction pipe 9 forms a trap 9a as a pipe that approaches the inside of the muffler 6 without coming into contact with it. The muffler 6 is composed of an upper plate 6a and a lower plate 6b made of a metal material with good heat dissipation properties, and is made by welding the mating portion 6C of the two.

In this configuration, the suction pipe 9 is heated by the high-temperature muffler 6, making it difficult for dew to condense, and even if dew condenses and drips, the water is received by the muffler 6 and evaporates rapidly. On the other hand, due to the cooling effect of the suction pipe 9, the pre-cooled vibro a.

The heat dissipation performance of 5b is also improved.

Effects of the Invention As described above, the present invention provides a dish-shaped muffler in the middle of a pre-cooling heat dissipation pipe that pre-cools gas discharged from a compressor.
Since the suction pipe trap is installed inside this muffler, it not only prevents condensation on the surface of the suction pipe and evaporates the condensed water within the muffler, preventing corrosion of the base and piping and gas leaks, but also prevents pre-cooling heat dissipation. It has practical effects such as improving the heat dissipation performance of pipes.

[Brief explanation of drawings]

Fig. 1 is a rear view of the main parts of a conventional example, Fig. 2 is a piping diagram of a refrigeration system employing an embodiment of the dew condensation prevention device of the present invention, and Fig. 3 is an example of applying the present invention to a refrigerator, etc. Fig. 4 is an enlarged side view of the main part, Fig. 5 and Fig. 6 show the upper and lower plates constituting the muffler, each a is a plan view, each is a front view, and C. is a side view. 2...Rotary compressor, 6g, 5b...
・Pre-cooling heat dissipation pipe, 6...Muffler, 9...
・Suction pipe, 9a...Trap. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3

Claims (1)

[Claims] The pipe has a pre-cooled heat dissipation pipe that pre-cools the gas discharged from the compressor and discharges the pre-cooled gas directly into the compressor again, and a muffler with a dish-shaped outer shape is provided in the middle of the pre-cooled heat dissipation pipe. A dew condensation prevention device for refrigerators, etc. that has a suction pipe trap inside the muffler.