JP2013096667A - Refrigerator freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator freezer which efficiently performs heat exchange with a refrigerant flowing in a radiator and cools a compressor without fail.SOLUTION: At a lower part of a refrigerator body 1, the refrigerator freezer has an outside air intake port 4 at one side plate 2a of the refrigerator body 1 and a machine room 3 having an exhaust port at the other side plate 2b. The outside air intake port 4 side of the machine room 3 is provided with a cooling fan 7 and a compressor 8 is provided downstream of a cooling fan 7 on an extended line of a line connecting the cooling fan 7 with the outside air intake port 4. A radiator 10 is provided upstream of the cooling fan 7 so as to face a part of the cooling fan 7.

Description

  The present invention relates to a refrigerator-freezer, and more particularly, to a configuration of a machine room provided in a lower part.

  A conventional refrigerator is provided with a machine room in which a compressor and a cooling fan are installed at the bottom, and a duct having an intake port that communicates with the machine room and takes in cooling air by the cooling fan. A part of the wire capacitor with thin wires that dissipate heat by blowing with a cooling fan is laminated on the pipe through which the refrigerant cooled by the machine flows, and is installed in the machine room. Some are installed in a planar shape (see, for example, Patent Document 1).

  In addition, a condenser pipe (heat radiator) used in a conventional refrigerator refrigeration cycle or the like is formed by meandering one pipe and attaching a plurality of heat radiating wires on one side to form a condensing pipe formed in a flat plate shape as a whole. There is a combination that is bent in a U shape and further bent from an intermediate portion in the longitudinal direction so that both side portions thereof are in a state of being engaged with each other (for example, see Patent Document 2).

  In addition, a heat exchanger (heat radiator) used for a condenser such as a refrigerator is composed of a pair of heat medium circulation tubes bent in a meandering manner and a plurality of heat transfer wires attached to each tube, Each tube has a meandering portion bent into a U-shape to form a pair of opposing planar portions, each of which is interposed between the other planar portions, and the ends of both tubes are Z-shaped. There are some which are welded and joined with a cylindrical connection pipe (for example, see Patent Document 3).

JP-A-6-207773 (pages 3, 4 and 1) Japanese Utility Model Publication No. 57-190379 (pages 2, 3 and 1-5) Japanese Patent Laid-Open No. 11-270979 (second page, FIG. 2)

In the refrigerator of Patent Document 1, a part of the wire condenser is installed in front of the cooling fan, and most of the other part is installed on the duct. Therefore, the cooling efficiency of the refrigerant flowing in the wire condenser is low.
Further, since the duct is provided in the lower part on the front side of the refrigerator, the distance from the cooling fan provided in the machine room is long, and even if air flows into the machine room from the duct having a lower temperature than the machine room, sufficient heat dissipation cannot be performed. Furthermore, the temperature of the air becomes high before reaching the cooling fan from the duct, and the cooling of the compressor, which is the original purpose of the cooling fan, is insufficient.

Further, since the wire capacitor is not arranged in a straight line with the duct, a vortex or the like is generated in the vicinity of the wire capacitor installed on the lower surface of the refrigerator, the air flow is deteriorated, and sufficient cooling cannot be performed.
In addition, a large space is required to install a flat wire capacitor at the bottom of the refrigerator. Also, since the wire capacitor is hotter than the temperature in the refrigerator, a certain heat insulation thickness is required. Therefore, there were many problems such as an increase in the size of the refrigerator.

  In the condenser of Patent Document 2, a flat pipe having a meandering shape with a heat radiating wire attached to only one side is bent into a U-shape, and then bent from the middle in the longitudinal direction so that both side portions are engaged with each other. Therefore, not only the wind passage is bad, but also the refrigerant flowing in the pipe cannot be reliably cooled due to insufficient heat dissipation.

The heat exchanger of Patent Document 3 is compact because one of a pair of tubes bent in a U-shape is interposed between the other tubes, but the interposed tubes serve as the resistance of the air path and the flow of wind Is bad.
In addition, since the end portions of a pair of separately manufactured heat exchangers are welded and joined by a Z-shaped connecting pipe, not only the number of welding processes increases, but also there is a risk of refrigerant leakage due to poor welding. .

  The present invention has been made to solve the above problems, and provides a refrigerator-freezer capable of efficiently exchanging heat through a refrigerant flowing through a radiator and capable of reliably cooling a compressor. It is the purpose.

The refrigerator-freezer according to the present invention has a machine room at the lower part of the refrigerator body, provided with an outside air inlet on one side plate of the refrigerator body and provided with an exhaust port on the other side plate,
A cooling fan is provided on the outside air inlet side of the machine room, and a compressor is provided on the downstream side of the cooling fan on an extended line connecting the cooling fan and the outside air inlet. A radiator is installed on the upstream side of the fan so as to face a part of the cooling fan.

According to the present invention, since the outside air inlet, the radiator, the cooling fan, and the compressor are arranged on the same line, the heat exchange efficiency of the radiator can be improved.
Further, since the radiator is disposed on the upstream side of the cooling fan so as to face a part thereof, the air passing through the radiator and the air taken in from the outside air inlet flow into the compressor side, and the compressor Can be reliably cooled.

It is a back side perspective view of the machine room of the refrigerator-freezer concerning one embodiment of the present invention. It is the top view which abbreviate | omitted a part of machine room of FIG. FIG. 3 is a right sectional view of FIG. 2. It is a perspective view of the heat radiator of FIG. It is explanatory drawing of the manufacturing procedure of the heat radiator of FIG. It is explanatory drawing of the manufacturing procedure of the heat radiator of FIG.

1 is a rear perspective view of a machine room of a refrigerator-freezer according to an embodiment of the present invention, FIG. 2 is a plan view in which a part of the machine room of FIG. 1 is omitted, and FIG. 3 is a right sectional view of FIG. is there.
A machine room 3 is provided on the back side of the lower part of the refrigerator body 1, and the machine room 3 is shifted from the center part in the width direction (left and right direction in the figure) to one side (right side in the figure), and has a large opening. A partition plate 5 having 6 is provided. The partition plate 5 forms a chamber A on the right side and a chamber B on the left side.

Reference numeral 7 denotes a cooling fan installed in the room B facing the opening 6 of the partition plate 5, and a compressor 8 is installed downstream of the cooling fan 7. In addition, 4 is a duct which is an outside air inlet provided in the side plate 2a on one side (A room side) of the refrigerator body 1. Although not shown, the side plate 2b on the other side (B room side) is provided with an exhaust port.
10 is a radiator disposed on the front side (upstream side) of the partition plate 5 in the room A, and is installed above the center of the opening 6 of the partition plate 5 by a holder 9 provided in the refrigerator body 1. ing.

The radiator 10 has a structure as shown in FIG. 4, and a single pipe 11 through which a refrigerant flows is alternately bent in a substantially U shape to form a meandering state as shown in FIG. 5 (a). Then, as shown in FIGS. 5B and 5C, a plurality of heat radiation wires 12 are joined in the vertical direction on both sides of the pipe 11, respectively.
Then, as shown by arrows in FIGS. 6A and 6B, it is formed by being bent into an inverted U shape from a substantially central portion in the vertical direction.

  In the heat radiator 10 configured as described above, meandering bent portions 11a are alternately positioned so as not to overlap each other, and one pipe 11 bent in an inverted U shape is interposed in the other pipe 11. There is nothing. Furthermore, since the radiator 10 is composed of one pipe 11, it is not necessary to join the radiators together by welding, so that not only man-hours are reduced, but refrigerant leakage does not occur due to poor welding.

  As described above, the radiator 10 configured as described above is held by the holder 9 in the A chamber and above the center portion of the opening 6 of the partition plate 5, and thus above the center portion of the cooling fan 7. The one end 13a is connected to the compressor 8 through a refrigerant pipe, and the other end 13b is connected to an evaporator (not shown) through the refrigerant pipe.

  In the machine room 3 in which the cooling fan 7 and the compressor 8 are installed as described above, the duct 4, the radiator 10, the cooling fan 7 and the compressor 8 are arranged in a straight line, and the radiator 10 , Located above the center of the opening 6 of the partition plate 5, and therefore above the center of the cooling fan 7.

  When the cooling fan 7 is driven in the refrigerator-freezer provided with the machine room 3 as described above, the outside air is sucked into the room A of the machine room 3 from the duct 4 and is installed above the upstream side of the cooling fan 7. A part of the air that has passed through the radiator 10 and the air that is linearly sucked into the cooling fan 7 without passing through the radiator 10 flows into the B chamber, cools the compressor 8, and then exits from the exhaust port to the outside. Discharged. At this time, since the radiator 10 is disposed on the line connecting the duct 4 and the cooling fan 7, the radiator 10 is efficiently cooled without stagnation of air due to vortices or the like.

  Further, since the distance between the duct 4 and the radiator 10 is short and they are located on the same line, air having a temperature substantially equal to the temperature of the outside air flows into the radiator 10 and flows through the pipe 11. Can be efficiently cooled.

  Furthermore, since the radiator 10 is disposed above the central portion of the cooling fan 7, the air flowing from the A room to the B room by the cooling fan 7 is heated by heat exchange with the radiator 10. Then, air having a temperature substantially equal to the outside air that does not pass through the radiator 10 flows toward the compressor 8 and cools the compressor 8 efficiently, so that the compressor 8 can be maintained with high efficiency.

  In the above description, the case where the radiator 10 is installed on the upstream side of the cooling fan 7 and above the center of the cooling fan 7 is shown, but the present invention is not limited to this. The cooling fan 7 is opposed to a part of the cooling fan 7 on the upstream side of the cooling fan 7, for example, below the center of the cooling fan 7 or on the upstream side of the cooling fan 7 in the lateral direction (forward or backward) A radiator 10 may be installed.

  DESCRIPTION OF SYMBOLS 1 Refrigerator main body, 2a, 2b Side plate, 3 Machine room, 4 Duct (outside air inlet), 5 Partition plate, 6 Opening part, 7 Cooling fan, 8 Compressor, 9 Holder, 10 Radiator, 11 Pipe, 11a Bending , 12 Heat dissipation wire.

Claims (4)

In the lower part of the refrigerator body, there is a machine room in which an outside air intake is provided on one side plate of the refrigerator body and an exhaust port is provided on the other side plate,
A cooling fan is provided on the outside air inlet side of the machine room, and a compressor is provided on the downstream side of the cooling fan on an extended line connecting the cooling fan and the outside air inlet. A refrigerator-freezer characterized in that a radiator is installed facing a part of the cooling fan on the upstream side of the fan.   2. The refrigerator-freezer according to claim 1, wherein the radiator is installed above the center of the cooling fan on the upstream side of the cooling fan.   A partition plate having an opening portion that is offset from the central portion in the width direction of the machine room toward the outside air intake side is provided, and the cooling fan is installed on the downstream side of the partition plate so as to face the opening portion. The refrigerator-freezer according to claim 1 or 2.   The radiator is formed in a meandering shape by alternately bending one pipe through which the refrigerant flows in a substantially U shape, and a plurality of heat dissipating wires are joined in the vertical direction on both sides of the meandering pipe. 4. The refrigerator-freezer according to any one of claims 1 to 3, wherein the refrigerator-freezer is formed by bending in an inverted U-shape from the vicinity of the center portion of the meandering pipe in the vertical direction.

Images