JP2003139417A - Cooling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling system wherein suction pipe heating in the refrigerating cycle is improved for the prevention of flow of the liquid refrigerant into the compressor, dew formation on the suction pipe, and compressor overheating. SOLUTION: A capillary 12 is closely fastened to a suction pipe 13 by soldering or the like for the heating of the pipe 13, the outlet of a pipe 14a extends from a condenser 14, and the extending section 14c is in contact with a pipe 13a on the inlet side of the suction pipe 13 on the side of the compressor 9.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cooling device,
More specifically, the present invention relates to the structures of the suction pipe and the condenser that constitute the refrigeration cycle of the cooling device.

[0002]

2. Description of the Related Art A refrigerator, which is one of conventional cooling devices, will be described. Examples of this type of refrigerator include those shown in FIGS. 1 and 7. In the figure, a main body 1 is composed of an outer box 2, an inner box 3 and a foamed heat insulating material 4 filled between them, and a machine room 8 is provided at the bottom of the main body 1.
Inside the machine room 8, a compressor 9, a condenser 14, and a blower 10 for dissipating heat generated from the compressor 9 and the condenser 14 were arranged.

Further, a cooler chamber 5 is provided on the inner rear surface of the inner box 3, and a cooler 6 for generating cool air and a blower 7 for forcedly circulating the generated cool air are arranged in the cooler chamber 5. Between the discharge side of the compressor 9 and the inlet of the cooler 6, a condenser 14 and a heat radiating pipe 11 also serving as the condenser 14, and a high pressure side pipe constituted by sequentially connecting a capillary tube 12 in series are connected. Then, between the outlet of the cooler 6 and the suction side of the compressor 9, a low-pressure side pipe constituted by connecting a suction pipe 13 additionally provided with the capillary tube 12 in series is connected.

FIG. 2 is a diagram showing the refrigeration cycle of the compressor, the compressor 9, the condenser 14, the heat radiation pipe 11,
The capillary tube 12 and the cooler 6 are sequentially connected by a suction pipe 13 to form an annular closed circuit.

In the above structure, the refrigerant having passed through the cooler 6 is compressed in the compressor 9 to become a high temperature, high pressure gaseous refrigerant. The gaseous refrigerant radiates heat through the condenser 14 and the heat radiating pipe 11, and becomes a medium-temperature, high-pressure liquid refrigerant. Subsequently, the liquid refrigerant is decompressed by the capillary tube 12 and then evaporated while passing through the cooler 6 to become a low-temperature, low-pressure refrigerant gas, which has a heat exchange function in each compartment. After that, the refrigerant in a gas state passes through the suction pipe 13 and is sucked into the compressor 9 again to complete the refrigeration cycle.

Then, the capillary tube 12 is brought into close contact with the suction pipe 13 by soldering or the like,
The former was cooled and the latter was heated by heat exchange between the two. In particular, in order to prevent the inflow of liquid refrigerant into the compressor 9 and the condensation of the suction pipe 13, the suction pipe 13
Is effective as a means for promoting the evaporation of the refrigerant.

However, in order to achieve this effect, there is a fear that it is necessary to increase the contact distance between the capillary tube 12 and the suction pipe 13 by soldering, and further, a hydrocarbon-based material having a large specific volume. When the refrigerant is used, there is a problem that liquid refrigerant may flow into the compressor 9 and dew condensation on the suction pipe 13 may easily occur.

[0008]

In view of the above problems, the present invention improves heating of a suction pipe that constitutes a refrigerating cycle of a cooling device, prevents inflow of a liquid refrigerant into a compressor and condensation of the suction pipe, and a condenser. It is an object of the present invention to provide a cooling device capable of improving the heat radiation efficiency.

[0009]

In order to solve the above problems, the present invention provides a compressor, a cooler, and a condenser, a capillary tube, etc. between the discharge side of the compressor and the inlet of the cooler. Connect the high-pressure side pipe configured by connecting, between the outlet of the cooler and the suction side of the compressor, to connect the low-pressure side pipe configured by connecting the suction pipe attached to the capillary tube In a cooling device equipped with a refrigeration cycle used as, extending the outlet of the pipe of the condenser,
The suction pipe is provided with a contact portion with the inlet side of the compressor side.

The contact portion is provided with a heat conducting means.

A fixture for fixing the contact portion is provided, and the suction pipe and the pipe of the condenser are fixed by the fixture.

The contact portion has a double structure.

A compressor, a cooler, a high-pressure side pipe formed by connecting a condenser, a capillary tube and the like between the discharge side of the compressor and the inlet of the cooler are connected, and the outlet of the cooler is connected. Between the suction side of the compressor, a cooling device equipped with a refrigeration cycle used by connecting a low-pressure side pipe configured by connecting a suction pipe attached to the capillary tube, at the outlet side of the condenser Extend the heat sink,
The suction pipe is connected to the inlet side of the compressor.

A compressor, a cooler, and a heat radiation pipe which doubles as a condenser between the discharge side of the compressor and the inlet of the cooler,
A high-pressure side pipe configured by connecting a capillary tube or the like is connected, and a low-pressure side configured by connecting a suction pipe that additionally attaches the capillary tube between the outlet of the cooler and the suction side of the compressor. In a cooling device including a refrigeration cycle in which pipes are connected and used, a pipe of the suction pipe on the inlet side of the compressor is extended and brought into contact with a heat radiation pipe also serving as the condenser.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below as examples based on the accompanying drawings. 1 is a schematic side sectional view (A) and a rear perspective view (B) of a refrigerator according to the present invention, FIG. 2 is a configuration diagram of a refrigeration cycle of the present invention, and FIG. 3 is a first embodiment of the present invention. FIG. 4 is a schematic view showing an example form, FIG. 4 is an enlarged schematic view (A) to (C) of a main part showing an application example of the first embodiment of the present invention, and FIG. 5 is a second view of the present invention. FIG. 7 is an enlarged schematic view of an essential part showing the form of the embodiment.
FIG. 6 is a schematic view showing a form of a third embodiment of the present invention. The same parts as those in the conventional example have the same reference numerals.

As shown in FIGS. 1 and 3, the main body 1 is composed of an outer box 2, an inner box 3 and a foamed heat insulating material 4 filled between them, and the bottom of the main body 1 is formed. A machine room 8 is provided in the machine room 8 and a compressor 9 and a condenser 14 are installed in the machine room 8.
And a blower 10 for dissipating heat generated from the compressor 9 and the condenser 14.

Further, a cooler chamber 5 is provided on the inner rear surface of the inner box 3, a cooler 6 for generating cool air and a blower 7 for forcibly circulating the generated cool air are arranged in the cooler chamber 5. Between the discharge side of the compressor 9 and the inlet of the cooler 6, a condenser 14 and a heat radiation pipe 11 also serving as the condenser 14, and a high pressure side pipe constituted by sequentially connecting a capillary tube 12 are connected. Between the outlet of the cooler 6 and the suction side of the compressor 9, a low-pressure side pipe constituted by connecting a suction pipe 13 additionally provided with the capillary tube 12 in series is connected.

FIG. 2 is a diagram showing the refrigeration cycle of the compressor, the compressor 9, the condenser 14, the heat radiation pipe 11,
The capillary tube 12 and the cooler 6 are sequentially connected by a suction pipe 13 to form an annular closed circuit.

In the above structure, the refrigerant that has passed through the cooler 6 is compressed in the compressor 9 to become a high temperature, high pressure gaseous refrigerant. The gaseous refrigerant radiates heat through the condenser 14 and the heat radiating pipe 11, and becomes a medium-temperature, high-pressure liquid refrigerant. Subsequently, the liquid refrigerant is decompressed by the capillary tube 12 and then evaporated while passing through the cooler 6 to become a low-temperature, low-pressure refrigerant gas, which has a heat exchange function in each compartment. Then, the refrigerant in the gas state passes through the suction pipe 13 and is sucked into the compressor 9 again to complete the refrigeration cycle.

Then, the capillary tube 12 is brought into close contact with the suction pipe 13 by soldering or the like,
The former is cooled and the latter is heated by heat exchange between the two. In particular, when a hydrocarbon-based refrigerant having a large specific volume is used, the inflow of liquid refrigerant into the compressor 9 and the dew condensation phenomenon of the suction pipe 13 are likely to occur.

Therefore, in the first embodiment of the present invention, in addition to the above-mentioned structure, as shown in FIG. 3, the outlet of the pipe 14a of the condenser 14 is extended, and the extended portion 14c is extended. A contact portion is provided in contact with the inlet pipe 13a of the suction pipe 13 on the compressor 9 side.

The extension portion 1 of the pipe 14a of the condenser 14
By bringing 4c into contact with the pipe 13a of the suction pipe 13 on the compressor 9 side, the suction pipe 13 is heated by the heat of the condenser 14, and the liquid refrigerant enters the compressor 9 as a refrigerant evaporation promoting means. Also, dew condensation on the suction pipe 13 is prevented.

The condenser 14 is cooled by the suction pipe 13 by heat exchange between the suction pipe 13 and the condenser 14, and the condenser 1 is cooled.
The heat dissipation efficiency of 4 is improved.

Next, an application example of the first embodiment of the present invention will be shown. FIG. 4A shows the pipe 1 of the condenser 14.
4a of the suction pipe 13 and the compressor 13 side pipe 13a of the suction pipe 13 is brazed 15 so that the extension 14c of the condenser 14 of the pipe 14a.
And the pipe 13 on the compressor 9 side of the suction pipe 13
A heat conducting means is provided between the suction pipe 13a and the pipe a, and the suction pipe 13 and the pipe 14a of the condenser 14 are firmly adhered to each other to further enhance the heat exchange rate between them.

FIG. 4B shows a pipe 13a on the compressor 9 side of the suction pipe 13 and the condenser 14.
A fixture 16 for fixing a contact portion of the pipe 14a with the extension portion 14c is provided, and the suction pipe 13 and the pipe 14a of the condenser 14 are fixed by the fixture 16, and the suction pipe 13 And the pipe 14a of the condenser 14 are firmly attached.

FIG. 4C shows a pipe 13a on the compressor 9 side of the suction pipe 13 and the condenser 1.
The portion of the pipe 14a corresponding to the contact portion with the extension portion 14c is formed in the double structure 17 to serve as the heat conducting means, and the heat of the condenser 14 is conducted to the suction pipe 13. is there.

In the second embodiment of the present invention, as shown in FIG. 5, the radiator plate 14b on the outlet side of the condenser 14 is extended, and the extended portion 14d is extended to the suction pipe 13. The heat transfer means is connected to the inlet side pipe 13a of the compressor 9 to transfer the heat of the condenser 14 to the suction pipe 13.
Although the radiator plate 14b of the condenser 14 is used in the present embodiment, a fin instead of the radiator plate 14b (plate) may be used.
It may be a condenser composed of a wire. (Not shown)

Further, in the third embodiment of the present invention, as shown in FIG. 6, a pipe 13a of the suction pipe 13 on the compressor 9 side is extended, and an extended portion 13b is extended to the condenser. The heat conducting means is brought into contact with the heat radiating pipe 11 arranged inside the outer box 2 which also serves as 14 and the heat of the condenser 14 is conducted to the suction pipe 13.

When the space for contacting the heat radiation pipe 11 of the outer box 2 cannot be secured, the heat conduction means between the suction pipe 13 and the heat radiation pipe 11 is
It may be performed via the outer box 2. (Not shown)

In the above structure, the capillary tube 12 is brought into close contact with the suction pipe 13 by soldering or the like to heat the suction pipe 13, and the pipe 14a of the condenser 14, the heat radiating plate 14b and the heat radiating pipe 11 are connected. Even with heat, the suction pipe 13
It is necessary to increase the contact distance between the capillary tube 12 and the suction pipe 13 due to soldering, etc. by heating, and when using a refrigerant such as hydrocarbon having a large specific volume, a liquid refrigerant It is possible to eliminate the problem that the inflow of the compressor 9 and the dew condensation phenomenon of the suction pipe 13 are likely to occur.

In the above embodiment, the refrigerator is composed of both the condenser 14 and the heat radiating pipe 11, but a refrigerator composed of either one of the condenser 14 and the heat radiating pipe 11 is also applicable. it can.

[0032]

As described above, according to the present invention,
(EN) A cooling device capable of improving heating of a suction pipe constituting a refrigeration cycle of a cooling device, preventing inflow of a liquid refrigerant into a compressor and dew condensation on the suction pipe, and improving heat dissipation efficiency of a condenser.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view (A) and a rear perspective view (B) of a refrigerator according to the present invention and a conventional example.

FIG. 2 is a configuration diagram showing a refrigeration cycle according to the present invention and a conventional example.

FIG. 3 is a schematic view showing the form of the first embodiment of the present invention.

FIG. 4 is an enlarged schematic view (A) to (C) of a main part showing an application example of the first embodiment of the present invention.

FIG. 5 is an enlarged schematic view of an essential part showing a mode of a second embodiment of the present invention.

FIG. 6 is a schematic view showing a form of a third embodiment of the present invention.

FIG. 7 is a schematic view showing a conventional example.

[Explanation of symbols]

1 Refrigerator body 2 outer box 3 inner box 4 foam insulation 5 Cooler room 6 cooler 7, 10 blower 8 machine room 9 compressor 11 Heat dissipation pipe 12 capillary tubes 13 Suction pipe 13a pipe 13b extension part 14 condenser 14a pipe 14b Heat sink 14c Extension part (pipe) 14d Extension part (heat sink) 15 With braze 16 fixtures 17 double structure

Claims (6)

[Claims] 1. A compressor, a cooler, and a high-pressure side pipe configured by connecting a condenser, a capillary tube and the like between the discharge side of the compressor and the inlet of the cooler, and connecting the cooler to the cooler. In a cooling device having a refrigeration cycle, which is used by connecting a low-pressure side pipe configured by connecting a suction pipe attached to the capillary tube between an outlet and a suction side of the compressor, the pipe of the condenser The cooling device is characterized in that the outlet of the suction pipe is extended and a contact portion with the inlet side of the suction pipe on the compressor side is provided. 2. The cooling device according to claim 1, wherein the contact portion is provided with heat conducting means. 3. The cooling device according to claim 1, further comprising a fixture for fixing the contact portion, the fixture fixing the suction pipe and the condenser pipe. . 4. The cooling device according to claim 1, wherein a portion corresponding to the contact portion has a double structure. 5. A compressor, a cooler, and a high-pressure side pipe configured by connecting a condenser, a capillary tube and the like between the discharge side of the compressor and the inlet of the cooler are connected to each other, and In a cooling device equipped with a refrigeration cycle, which is used by connecting a low-pressure side pipe configured by connecting a suction pipe attached to the capillary tube between an outlet and a suction side of the compressor, the outlet of the condenser Side cooling plate is extended and is connected to the inlet side of the compressor of the suction pipe. 6. A compressor, a cooler, and a high-pressure side pipe formed by connecting a heat-radiating pipe also serving as a condenser, a capillary tube, and the like between the discharge side of the compressor and the inlet of the cooler. In a cooling device including a refrigeration cycle used by connecting a low-pressure side pipe configured by connecting a suction pipe attached to the capillary tube between the outlet of the cooler and the suction side of the compressor, A cooling device, characterized in that a pipe of the suction pipe on the inlet side of the compressor is extended and brought into contact with a heat radiation pipe which also serves as the condenser.