JPH07139854A - Refrigerator - Google Patents

Abstract

PURPOSE:To contrive a complete gasification of a refrigerant even upon starting after defrosting, and hence improve reliability of a compressor by providing a trap on a piping extending between an accumulator for completely gasifying a liquid refrigerant which has not completely vaporized in an evaporator and the compressor. CONSTITUTION:A refrigerator includes a compressor 1 for compressing a refrigerant, a condenser 2 for cooling a refrigerator for condensation thereof, a capillary tube 3, an evaporator 4 for vaporizing the liquid refrigerant, and an accumulator 5 for completely gasifying the liquid refrigerant which has not vaporized in the evaporator 4. A trap 7 is provided between the accumulator 5 and the compressor 1. Upon defrosting a refrigerant converted to gas in the evaporator 4 is again liquefied in a piping extending between the evaporator 4 and the accumulator 5 and flows into the accumulator 5 so that the liquid refrigerant returns to the compressor 1 in the form of a liquid refrigerant upon the compressor 1 being started, and it is thereupon changed in phase to a complete gas refrigerant owing to abrupt expansion thereof in the trap 7 and is returned to the compressor 1.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a refrigerator.

[0002]

2. Description of the Related Art In recent years, in refrigerating cycles of refrigerators, how to gasify the refrigerant returned to the compressor has become a problem.

A conventional refrigeration cycle will be described below with reference to FIGS. 4 and 5. As shown in FIG. 4, the refrigerating cycle of the refrigerator includes a compressor 1, a condenser 2, a capillary tube 3, an evaporator 4, and an accumulator 5. In this refrigeration cycle, the refrigerant is compressed by the compressor 1 and condensed by the condenser 2 to become a high temperature and high pressure liquid refrigerant. Then, the liquid refrigerant whose pressure has been reduced through the capillary tube 3 is evaporated in the evaporator 4, and the liquid refrigerant that has not been completely evaporated in the evaporator 4 is completely gasified by the accumulator 5 and returns to the compressor 1 and again the compressor. It is compressed by 1 and circulates.

In such a refrigeration cycle, when there is a large amount of liquid refrigerant immediately after the compressor is started or when there is a large amount of liquid refrigerant that cannot be completely evaporated in the evaporator 4 due to a decrease in heat load, the accumulator 5 completely gasifies the gas. There is a problem in that the liquid cannot be compressed and the cylinder is destroyed.

Therefore, as a conventional refrigerator for solving this problem, as described in Japanese Patent Publication No. 62-131165, an accumulator 5 as shown in FIG.
Has been arranged so that only the gas returns to the compressor 1. It is provided with an expandable member 6 made of a shape memory alloy at an inlet portion inside the main body of the accumulator 5 and a deforming and expanding operation of the expandable member 6 deflects the flowing direction of the refrigerant depending on the temperature of the refrigerant flowing into the accumulator.

[0006]

However, according to the conventional method, during defrosting, the refrigerant gasified in the evaporator 4 has a lower temperature than the evaporator 4 and the accumulator 5.
Since it liquefies again into the accumulator 5 in the pipe between and, when the compressor 1 is started, the liquid refrigerant cannot be rapidly expanded due to the sudden suction of the compressor 1 and is returned as the liquid refrigerant. However, there was a drawback that it caused liquid compression.

Further, according to the conventional method, during defrosting, the refrigerant gasified in the evaporator 4 is liquefied again in the pipe between the evaporator 4 and the accumulator 5 having a lower temperature than the evaporator 4 and flows into the accumulator 5. . When the amount of the liquefied refrigerant is large, it overflows from the opening end of the accumulator outlet pipe and flows into the pipe between the accumulator 5 and the compressor 1. Therefore, when the compressor 1 is started, a sudden suction of the compressor 1 is prevented. Therefore, the liquid refrigerant cannot be rapidly expanded, and the liquid refrigerant is returned as it is, which has a drawback of causing liquid compression.

In view of the above problems, the present invention completely gasifies the refrigerant and returns it to the compressor even at the time of startup after defrosting.
An object of the present invention is to provide a refrigerator that can improve the reliability of the compressor.

[0009]

A means for solving the problems according to the present invention is a compressor for compressing a refrigerant into a high-temperature and high-pressure gas, a condenser for cooling and condensing the refrigerant, and a capillary tube for decompressing the liquid refrigerant. , An evaporator for evaporating the liquid refrigerant, an accumulator for completely gasifying the liquid refrigerant that could not be completely evaporated in the evaporator, for connecting the compressor, the condenser, the capillary tube, the evaporator, and the accumulator In a refrigerator provided with a pipe, a trap is provided in the pipe between the accumulator and the compressor.

Further, the means for solving the problems according to the present invention includes a compressor for compressing a refrigerant into a high-temperature and high-pressure gas, a condenser for cooling and condensing the refrigerant, a capillary tube for decompressing the liquid refrigerant, and a liquid refrigerant. An evaporator that evaporates, an accumulator that completely gasifies the liquid refrigerant that could not be evaporated in the evaporator, and a pipe that connects the compressor, the condenser, the capillary tube, the evaporator, and the accumulator In the refrigerator, a trap is provided in the pipe between the accumulator and the compressor, and the lower end surface of the flow path is installed above the accumulator outlet pipe opening end at the uppermost stage of the trap.

Further, the means for solving the problems according to the present invention is a compressor for compressing a refrigerant into a high-temperature and high-pressure gas, a condenser for cooling and condensing the refrigerant, a capillary tube for decompressing the liquid refrigerant, and a liquid. An evaporator that evaporates the refrigerant, an accumulator that completely gasifies the liquid refrigerant that could not be completely evaporated in the evaporator, and a pipe for connecting the compressor, the condenser, the capillary tube, the evaporator, and the accumulator. In the provided refrigerator, a trap is provided in the pipe between the evaporator and the compressor.

[0012]

With the above-mentioned solution means, the refrigerant gasified in the evaporator during defrosting is liquefied again in the pipe between the evaporator and the accumulator having a lower temperature than the evaporator and flows into the accumulator. It returns to the compressor as it is, but due to the rapid expansion by the trap, it returns to the compressor as a complete gas refrigerant.

Further, by the above-mentioned solution means, the refrigerant gasified in the evaporator at the time of defrosting is liquefied again in the pipe between the evaporator and the accumulator whose temperature is lower than that of the evaporator, and flows into the accumulator. When the amount of liquefied refrigerant is large, it overflows from the opening end of the accumulator outlet pipe, flows into the pipe between the accumulator and the compressor, and returns to the compressor as liquid refrigerant when the compressor starts up, but flows at the top stage of the trap. Since the lower end of the road is installed above the opening end of the accumulator outlet pipe, it is possible to suppress the inflow of liquid refrigerant into the pipe between the accumulator and the compressor during defrosting, and to prevent a sudden trap by a trap when starting the compressor. The expansion returns to the compressor as a complete gas refrigerant.

Further, by the above solving means, the refrigerant gasified in the evaporator at the time of defrosting is liquefied again in the pipe between the evaporator and the accumulator whose temperature is lower than that of the evaporator and flows into the accumulator. Then, when the amount of liquefied refrigerant is large, it overflows from the accumulator outlet pipe opening end and flows into the pipe between the accumulator and the compressor and returns to the compressor as a liquid refrigerant at the time of starting the compressor, but with the evaporator and the accumulator. The trap provided in the pipe between the two can suppress the inflow of the liquid refrigerant into the accumulator at the time of defrosting, and when the compressor is started, it rapidly returns to the compressor as a complete gas refrigerant due to the rapid expansion by the accumulator.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A refrigerator according to an embodiment of the present invention will be described below with reference to the drawings. In the figure, the same reference numerals as those of the conventional example indicate the same members, and detailed description thereof will be omitted. FIG. 1 is a refrigeration cycle diagram of a first embodiment of a refrigerator according to the present invention,
2 is a sectional view showing an accumulator and a trap of a second embodiment of the refrigerator according to the present invention, and FIG. 3 is a refrigeration cycle diagram of the third embodiment of the refrigerator according to the present invention.

The refrigerator according to the first embodiment of the present invention has a compressor 1 as shown in FIG.
A condenser 2 that cools and condenses the refrigerant, a capillary tube 3 that decompresses the liquid refrigerant, an evaporator 4 that evaporates the liquid refrigerant, and a liquid refrigerant that cannot be completely evaporated in the evaporator 4 It comprises an accumulator 5 to be converted, a pipe for connecting the compressor 1, the condenser 2, the capillary tube 3, the evaporator 4 and the accumulator 5. Then, a trap 7 is provided between the accumulator 5 and the compressor 1.
To provide.

In the above structure, during defrosting, the refrigerant gasified in the evaporator 4 is liquefied again in the pipe between the evaporator 4 and the accumulator 5 whose temperature is lower than that of the evaporator 4 and flows into the accumulator 5 to start the compressor 1. At this time, the liquid refrigerant returns to the compressor 1 as it is, but due to the rapid expansion by the trap 7, it returns to the compressor as a complete gas refrigerant.

As described above, by providing the trap 7 between the accumulator 5 and the compressor 1, the refrigerant is completely gasified even at the time of start-up after defrosting, and the compressor 1
Can be returned to.

The refrigerator according to the second embodiment of the present invention includes a compressor 1 for compressing a refrigerant into a high temperature and high pressure gas as shown in FIGS. 1 and 2, and a condenser 2 for cooling and condensing the refrigerant. A capillary tube 3 for decompressing the liquid refrigerant, an evaporator 4 for evaporating the liquid refrigerant, an accumulator 5 for completely gasifying the liquid refrigerant that has not been completely evaporated in the evaporator 4, the compressor 1 and a condenser 2, a capillary tube 3, an evaporator 4, and a pipe for connecting the accumulator 5. Then, the trap 7 is provided between the accumulator 5 and the compressor 1, and the lower end surface 7a of the flow path is installed above the open end 5a of the outlet pipe of the accumulator at the uppermost stage of the trap.

In the above structure, during defrosting, the refrigerant gasified in the evaporator 4 is liquefied again in the pipe between the evaporator 4 and the accumulator 5 having a temperature lower than that of the evaporator 4 and flows into the accumulator 5. When the amount of the liquefied refrigerant is large, it overflows from the accumulator outlet pipe opening end 5a, flows into the pipe between the accumulator 5 and the compressor 1, and returns to the compressor 1 as the liquid refrigerant when the compressor 1 is started. When defrosting is performed by the trap 7, the inflow of liquid refrigerant into the pipe between the accumulator 5 and the compressor 1 is suppressed, and when the compressor 1 is started, the trap 7 rapidly expands and returns to the compressor as a complete gas refrigerant.

As described above, the trap 7 is provided between the accumulator 5 and the compressor 1, and the lower end surface 7a of the flow path is installed above the accumulator outlet pipe opening end 5a at the uppermost stage of the trap, thereby starting after defrosting. At any time, the gas refrigerant can be returned to the compressor 1.

As shown in FIG. 3, the refrigerator of this embodiment has a compressor 1 for compressing a refrigerant into a high-temperature and high-pressure gas, a condenser 2 for cooling and condensing the refrigerant, and a capillary tube for decompressing the liquid refrigerant. 3, an evaporator 4 that evaporates the liquid refrigerant, an accumulator 5 that completely gasifies the liquid refrigerant that could not be evaporated in the evaporator 4, the compressor 1 and the condenser 2
And a tube for connecting the capillary tube 3, the evaporator 4, and the accumulator 5. And the evaporator 4
A trap 7 is provided between the compressor and the compressor 1.

In the above structure, during defrosting, the refrigerant gasified in the evaporator 4 is liquefied again in the pipe between the evaporator 4 and the accumulator 5 whose temperature is lower than that of the evaporator 4 and flows into the accumulator 5 to flow into the compressor 1. At the time of startup, the liquid refrigerant returns to the compressor 1 as it is, but the trap 7 prevents the liquid refrigerant from flowing into the accumulator 5, and when the compressor 1 starts, the accumulator 5 rapidly expands to return it to the compressor 1 as a complete gas refrigerant. .

As described above, by providing the trap 7 between the evaporator 4 and the accumulator 5, a large amount of liquid refrigerant does not flow into the accumulator 5 even at the time of start-up after defrosting, so that the normal operation is not performed. The gas refrigerant by the accumulator can be returned to the compressor 1.

[0025]

As described above, the refrigerator of the present invention comprises a compressor for compressing a refrigerant into a high temperature and high pressure gas, a condenser for cooling and condensing the refrigerant, and a capillary tube for decompressing the liquid refrigerant. An evaporator that evaporates a liquid refrigerant, an accumulator that completely gasifies the liquid refrigerant that could not be evaporated in the evaporator, and a pipe for connecting the compressor, the condenser, the capillary tube, the evaporator, and the accumulator. And, a trap is provided in the pipe between the accumulator and the compressor, and the liquid refrigerant that has flowed into the accumulator during defrosting is sucked into the compressor when the compressor is started, but the liquid refrigerant is completely expanded by the rapid expansion by the trap. It gasifies and returns to the compressor. Therefore, it is possible to prevent the destruction of the cylinder due to liquid compression, and it is possible to provide a refrigerator with a highly reliable compressor.

Further, the refrigerator of the present invention comprises a compressor for compressing a refrigerant into a high-temperature and high-pressure gas, a condenser for cooling and condensing the refrigerant, a capillary tube for decompressing the liquid refrigerant, and an evaporator for the liquid refrigerant. An evaporator, an accumulator that completely gasifies the liquid refrigerant that could not be evaporated in the evaporator, and a pipe for connecting the compressor, the condenser, the capillary tube, the evaporator, and the accumulator,
A trap is provided in the pipe between the accumulator and the compressor, and by installing the lower end surface of the flow path above the accumulator outlet pipe opening end at the uppermost stage of the trap, the liquid refrigerant flowing into the accumulator during defrosting Even when the amount is large and overflows from the opening end of the accumulator outlet pipe, it is possible to prevent the liquid refrigerant from flowing into the pipe between the accumulator and the compressor, and when the compressor starts up, the liquid refrigerant is rapidly expanded due to the trap. It completely gasifies and returns to the compressor. Therefore, it is possible to prevent the cylinder from being broken due to liquid compression, and to provide a refrigerator with a highly reliable compressor.

Further, the refrigerator of the present invention comprises a compressor for compressing a refrigerant into a high temperature and high pressure gas, a condenser for cooling and condensing the refrigerant, a capillary tube for decompressing the liquid refrigerant, and a liquid refrigerant. An evaporator for evaporating, an accumulator for completely gasifying the liquid refrigerant that could not be evaporated in the evaporator, and a pipe for connecting the compressor, the condenser, the capillary tube, the evaporator, and the accumulator, A trap is provided in the pipe between the evaporator and the accumulator, and the liquid refrigerant that has flowed into the accumulator during defrosting is sucked into the compressor when the compressor starts up, but the trap prevents the liquid refrigerant from flowing into the accumulator. When the compressor is started, the liquid refrigerant is completely gasified by the rapid expansion by the accumulator and returns to the compressor. Therefore, it is possible to prevent the destruction of the cylinder due to liquid compression, and it is possible to provide a refrigerator with a highly reliable compressor.

[Brief description of drawings]

FIG. 1 is a refrigeration cycle diagram of a first embodiment of a refrigerator according to the present invention.

FIG. 2 is a sectional view showing an accumulator and a trap of a second embodiment of the refrigerator according to the present invention.

FIG. 3 is a refrigeration cycle diagram of a third embodiment of the refrigerator according to the present invention.

FIG. 4 is a sectional view showing a general accumulator.

FIG. 5 is a sectional view showing an accumulator of a conventional refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Capillary tube 4 Evaporator 5 Accumulator 5a Accumulator outlet pipe opening end 6 Expansion member 7 Trap 7a Trap Uppermost flow path lower end surface

Claims (3)

[Claims] 1. A compressor for compressing a refrigerant into a high-temperature and high-pressure gas, a condenser for cooling and condensing the refrigerant, a capillary tube for decompressing the liquid refrigerant, and an evaporator for evaporating the liquid refrigerant, An accumulator that completely gasifies the liquid refrigerant that could not be evaporated in the evaporator, and a refrigerator including a pipe for connecting the compressor, the condenser, the capillary tube, the evaporator, and the accumulator, in the refrigerator, A refrigerator characterized in that a trap is provided in a pipe between the compressor and the compressor. 2. The refrigerator according to claim 1, wherein the lower end surface of the flow path is provided at the uppermost stage of the trap and above the opening end of the accumulator outlet pipe. 3. A compressor for compressing a refrigerant into a high temperature and high pressure gas, a condenser for cooling and condensing the refrigerant, a capillary tube for decompressing the liquid refrigerant, an evaporator for evaporating the liquid refrigerant, and An evaporator and an accumulator in a refrigerator equipped with an accumulator that completely gasifies liquid refrigerant that could not be completely evaporated in the evaporator, and a pipe for connecting the compressor, the condenser, the capillary tube, the evaporator, and the accumulator. A refrigerator having a trap provided in a pipe between the refrigerator and the refrigerator.