JP3853069B2 - refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator, and more particularly to improving the heat dissipation efficiency of a condenser.
[0002]
[Prior art]
A conventional refrigerator is disclosed in JP-A-4-256254. Hereinafter, an example of the conventional refrigerator will be described with reference to the drawings.
[0003]
A conventional configuration is shown in FIGS. 5 and 6, reference numeral 1 denotes a refrigerator body, which houses a compressor 2 and a cooling fan 3, a machine room 4 having an exhaust port 4 a, a condenser 5 inside, and an intake port 6 a. The cooling duct 6 is provided.
[0004]
About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below. The outside air is sucked from the intake port 6a by driving the cooling fan 3, cools the condenser 5, passes through the cooling fan 3, cools the compressor 2, and is discharged from the exhaust port 4a.
[0005]
Here, since the center of the cooling fan 3 is in a direction coinciding with the exhaust port 4a, the flow of the cooling air by the cooling fan 3 is not easily obstructed by the compressor, the air blowing efficiency of the cooling fan 3 is increased, and condensation is performed. The cooling effect of the vessel is increased.
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, the temperature difference between the cooling air and the condenser 5 is large on the cooling air suction side of the condenser 5, but the cooling air is somewhat heated with the condenser 5 on the cooling air discharge side of the condenser 5. After the replacement, the cooling air temperature is high and the temperature difference between the condenser 5 and the cooling air is small.
[0007]
In general, the heat dissipation of the condenser 5 is expressed by the following equation:
Q = K ・ A ・ ΔT
However, K: heat transmission rate, A: heat transfer area, ΔT: temperature difference between the condenser and the cooling air.
[0008]
Therefore, when the temperature difference between the condenser 5 and the cooling air becomes small, the heat radiation amount becomes low. Therefore, in the said conventional structure, the thermal radiation efficiency in the cooling wind discharge side of the condenser 5 fell, and there was a possibility that the condenser 5 could not be used efficiently.
[0009]
The present invention solves the above-described conventional problems, and by constantly reducing the cooling air temperature for cooling the condenser 5 and increasing the temperature difference with the condenser 5, the heat dissipation efficiency of the condenser 5 is increased, The purpose is to increase the efficiency of the refrigerator.
[0010]
In addition, since the direction and position of the cooling fan 3 are deviated from the condenser 5, the cooling air is biased and stagnation, the cooling air does not flow through the entire condenser 5, and the condenser 5 cannot be efficiently cooled. There was a possibility that the condenser 5 was not used efficiently.
[0011]
Another object of the present invention is to use the entire condenser 5 effectively by flowing the cooling air from the cooling fan 3 uniformly to the condenser 5, thereby improving the heat dissipation efficiency of the condenser 5 and improving the efficiency of the refrigerator. With the goal.
[0012]
[Means for Solving the Problems]
In order to solve this problem, the refrigerator of the present invention includes a condenser, a cooling fan that cools the condenser, and the condenser inside, and on the suction side of the condenser, the upper side or the lower side of the condenser. A cooling duct having a wide gap in the opposite direction to the suction side on the discharge side of the condenser and a wide gap in both the upper and lower sides, and the rotation direction of the cooling fan is When rotating in the direction away from the condenser on the lower side, widen the upper gap on the suction side of the condenser, widen the lower gap on the discharge side, and rotate the cooling fan on the upper side of the cooling fan. When rotating in a direction away from the condenser, the lower gap is wide on the suction side of the condenser and the upper gap is wide on the discharge side .
[0013]
Thereby, the temperature difference between the condenser and the cooling air can be kept large on the cooling air discharge side of the condenser, the heat radiation efficiency on the cooling air discharge side of the condenser can be increased, and the heat radiation efficiency of the condenser can be increased. .
[0015]
Thereby, the change in the heat dissipation efficiency of the condenser due to the rotation direction of the cooling fan is reduced, and the heat dissipation efficiency of the condenser can be increased in either rotation direction.
[0016]
In addition, a condenser, a cooling fan for cooling the condenser, and the condenser inside are provided, and on the suction side of the condenser, the gap between the upper side and the lower side of the condenser is wide and the discharge of the condenser On the side, it has a cooling duct with a wide gap in the opposite direction to the suction side and a wide gap between both the upper and lower cooling ducts, and a gap between the condenser fins or wires or pipes where the gap between the upper and lower cooling ducts is wide Was made wider than the other parts.
[0017]
Thereby, by reducing the pressure loss in a portion where the gap between the upper and lower cooling ducts is wide, it is possible to prevent a decrease in the amount of cool air and prevent a decrease in the heat radiation amount of the condenser.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention includes a condenser, a cooling fan for cooling the condenser, and the condenser inside, and on the suction side of the condenser, either the upper side or the lower side of the condenser is provided. A cooling duct having a wide gap in the opposite direction to the suction side on the discharge side of the condenser and a wide portion in both the upper and lower gaps, and the rotation direction of the cooling fan is below the cooling fan When rotating in a direction away from the condenser, the upper gap is widened on the suction side of the condenser, the lower gap is widened on the discharge side, and the rotation direction of the cooling fan is the condensation on the upper side of the cooling fan. When rotating in a direction away from the condenser, the lower gap is wide on the suction side of the condenser and the upper gap is wide on the discharge side. And keep the temperature difference between cooling air and Improved heat dissipation efficiency of the condenser, it is possible to increase the efficiency of the refrigerator.
Moreover, the temperature difference with the cooling air on the cooling air discharge side of the condenser can be further increased, and the heat dissipation efficiency of the condenser can be increased.
[0022]
The invention according to claim 2 is provided with a condenser, a cooling fan for cooling the condenser, and the condenser inside, and on the suction side of the condenser, the gap on either the upper side or the lower side of the condenser A cooling duct having a wide gap in the opposite direction to the suction side on the discharge side of the condenser and a wide gap between both the upper and lower sides, and a condenser having a wide gap between the upper and lower cooling ducts. Since the gap between the fins, wires, or pipes is wider than the other parts, the pressure loss of the fins becomes high and the cooling air does not flow easily in the duct where the gap between the condenser and the upper and lower parts is wide. It is possible to prevent a decrease in the heat radiation amount of the condenser due to a decrease in the amount of cooling air.
[0024]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, about the same structure as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0025]
(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a refrigerator according to claim 1. In FIG. 1, 7 is a cooling duct and is provided with an air inlet 7a.
[0026]
The movement of the refrigerator configured as described above will be described below. The cooling air sucked from the intake port 7a by the cooling fan 3 cools the condenser 5 in the cooling duct 7, passes through the cooling fan 3, cools the compressor 2, and is then discharged from the exhaust port 4a.
[0027]
Here, since there is a gap between the cooling duct 7 and the condenser 5, there are cooling air flowing through the condenser 5 part and cooling air flowing through the gap part in the cooling duct 7. Then, the cooling air that has flowed through the condenser so far in a portion where the gap between the condenser 5 and the cooling duct 7 is wide both up and down flows through a new gap, and the cooling air that has flowed through the gap until now flows through the condenser 5. It will be.
[0028]
As a result, the high-temperature cooling air heat exchanged with the condenser 5 on the cooling air suction side of the condenser 5 flows through the clearance of the cooling duct 7 of the condenser 5 on the cooling air discharge side of the condenser 5, and the cooling of the condenser 5 is performed. The low-temperature cooling air that has not exchanged heat with the condenser 5 passes through the condenser 5 on the cooling air discharge side of the condenser 5 through the gap between the condenser 5 and the cooling duct 7 on the wind suction side. As a result, the cooling air heat exchanged with the condenser 5 on the cooling air discharge side of the condenser 5 becomes a cooling air having a low temperature. Therefore, the heat exchange efficiency on the cooling air discharge side of the condenser 5 is higher than in the prior art.
[0029]
Therefore, the heat radiation efficiency as the whole condenser becomes high, and it can be set as a highly efficient refrigerator.
[0030]
(Embodiment 2)
FIG. 2 is a longitudinal sectional view of the refrigerator according to claim 2. In FIG. 2, 8 is a cooling fan that rotates to move away from the condenser 5 on the lower side. 9 is configured such that the upper gap is wide on the cooling air suction side of the condenser 5, the lower gap is wide on the cooling air discharge side of the condenser 5, and that both upper and lower gaps are wide. It is a cooling duct.
[0031]
About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below. The cooling air from the cooling fan 8 cools the condenser 5 and is sucked into the cooling fan 8, but the rotation direction of the cooling fan 8 rotates in the direction away from the condenser 5 below the cooling fan 8. The direction of the cooling air in the vicinity of the cooling fan 8 is obliquely downward.
[0032]
Here, when the cooling duct 9 has a wide lower gap on the cooling air discharge side of the condenser 5, the cooling air and the condenser 5 that cooled the condenser 5 on the cooling air suction side of the condenser 5 The cooling air flowing through the gap above the cooling duct 9 is sucked diagonally downward, and smoothly flows through the condenser 5 and the condenser 5 and the gap below the cooling duct 9 and the condenser 5, respectively.
[0033]
Therefore, the high-temperature cooling air after cooling the condenser 5 and the low-temperature cooling air flowing through the gap between the condenser 5 and the cooling duct 9 are smoothly exchanged, and the heat on the cooling air discharge side of the condenser 5 is exchanged. The exchange efficiency becomes higher and the efficiency of the condenser 5 is increased.
[0034]
In this embodiment, when the rotation direction of the cooling fan 8 rotates in the direction away from the condenser 5 on the upper side of the cooling fan 8, the cooling duct 9 is connected to the lower gap on the cooling air suction side of the condenser 5. The same effect can be obtained by widening the upper gap on the cooling air discharge side of the condenser 5.
[0035]
(Embodiment 3)
FIG. 3 is a longitudinal sectional view of the refrigerator according to claim 3. In FIG. 3, reference numeral 10 denotes a condenser, which is composed of fins (not shown) and tubes (not shown), and is a portion where the gap between the condenser 10 and the cooling tact 7 is wide (hatching part). The gap between the fins (hereinafter referred to as fin pitch) is wider than the fin pitch of other portions.
[0036]
About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below. The cooling air sucked from the intake port 7 a by the cooling fan 3 cools the condenser 10 in the cooling duct 7, passes through the cooling fan 3, cools the compressor 2, and then is discharged from the exhaust port 4 a.
[0037]
Here, since there is a gap between the cooling duct 7 and the condenser 10, there are cooling air flowing through the condenser 10 part and cooling air flowing through the gap part in the cooling duct 7. Then, the cooling air that has flowed through the condenser 10 so far in the portion where the gap between the condenser 10 and the cooling duct 7 is wide at both the upper and lower sides flows through the new gap, and the cooling air that has flowed through the gap until now passes through the condenser 10. Will flow.
[0038]
Here, when all the fin pitches of the condenser 10 are the same, in the portion where the gap between the condenser 10 and the cooling duct 7 is wide at both the top and bottom, a large amount of cooling air tends to flow through the condenser 10 and the fins ventilate. When the cross-sectional property is reduced, the pressure loss is increased, so that the cooling air volume may be reduced.
[0039]
However, by increasing the fin pitch in the portion where the gap between both the upper and lower sides of the condenser 10 is wide, the pressure loss due to the fins can be reduced, and the cooling air volume can be prevented from decreasing.
[0040]
Accordingly, it is possible to prevent a decrease in the heat radiation amount due to a decrease in the cooling air amount, and it is possible to prevent a decrease in the heat radiation efficiency of the condenser 10.
[0041]
In the present embodiment, the condenser 10 has been described as having fins and pipes, but even if the fins are changed to wires or the like, the same effect can be obtained by widening the pitch.
[0042]
(Embodiment 4)
FIG. 4 is a cross-sectional view of the refrigerator according to claim 4. In FIG. 4, reference numeral 11 denotes an evaporating dish, which is accommodated between the cooling fan 3 and the condenser 5 in the refrigerator machine room 4. Reference numeral 12 denotes an air guider that is integrally formed with the condensing dish 11 and divides the cooling duct into two parts, and divides the cooling air on the one hand at substantially the center of the cooling fan 3 and on the other hand at the substantially center of the condenser 5.
[0043]
About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below. First, the case where there is no air guider 12 will be described. In the cooling duct 7, the cooling fan 3 faces in a direction different from that of the condenser 5, and the position is also deviated from the center of the condenser 5. In such a case, most of the cooling air from the cooling fan 3 flows in the vicinity of the suction side of the cooling fan 3 of the condenser 5, and the cooling air speed is on the opposite side of the condenser 5 near the suction side of the cooling fan 3. An extremely slow part or a part where no cooling air flows is generated.
[0044]
If the speed of the cooling air flowing through the condenser 5 becomes extremely slow or the cooling air does not flow, the condenser 5 enters a state of natural heat dissipation, and the amount of heat dissipation becomes extremely low. Therefore, compared with the case where cooling air flows uniformly through the condenser 5 even with the same amount of cooling air, the heat radiation amount of the condenser 5 as a whole is lower.
[0045]
Next, the case where there is the air guider 12 will be described. The cooling air sucked from the cooling fan 3 is divided into two parts on the suction side of the cooling fan 3. Each of the divided air paths communicates with the vicinity of the suction side of the cooling fan 3 of the condenser 5 and the opposite side. Thereby, the cooling air sucked from the cooling fan 3 also flows on the opposite side of the condenser 5 in the vicinity of the cooling fan 3 suction side, and the cooling air flows uniformly throughout the entire condenser.
[0046]
Therefore, even when the orientation of the cooling fan 3 and the condenser 5 are deviated due to the arrangement space or the like, or when the positions of the cooling fan 3 and the condenser 5 are deviated, the cooling air is uniformly distributed from the entire condenser 5. Thus, the entire condenser 5 is efficiently used, the efficiency of the condenser 5 is increased, and a highly efficient refrigerator can be obtained.
[0047]
In this embodiment, the number of divisions of the cooling duct 7 is two. However, any number of divisions may be used as long as the cooling air flows uniformly through the condenser 5.
[0048]
In the present embodiment, the condenser 5 is on the suction side of the cooling fan 3, but the same effect can be obtained when the condenser 5 is on the discharge side of the cooling fan 3.
[0049]
Further, in the present embodiment, the case where the direction and position of the cooling fan 3 are deviated from the condenser 5 has been described. However, even when the position and direction are not deviated, the flow of the cooling air is uneven, By equalizing the flow with the air guider 12, the same effect can be obtained.
[0050]
In this embodiment, since the air guider 12 is integrally formed with the evaporating dish 11, the cooling air flowing through the evaporating dish 11 also flows uniformly through the entire evaporating dish, and the effect of promoting the evaporation of drain water in the evaporating dish is also achieved. can get.
[0051]
【The invention's effect】
As described above, according to the present invention, the high-temperature cooling air that has cooled the condenser on the cooling air intake side of the condenser by the cooling duct forms a gap between the cooling duct and the condenser on the cooling air discharge side of the condenser. The low-temperature cooling air flowing through the gap between the cooling duct and the condenser on the cooling air suction side of the condenser cools the condenser on the cooling air discharge side of the condenser. Accordingly, the temperature difference between the condenser and the cooling air can be increased also on the cooling air discharge side of the condenser, and the heat dissipation efficiency of the condenser can be increased.
[0052]
In addition, since the upper clearance or the lower clearance on the cooling air discharge side of the condenser is limited depending on the rotation direction of the cooling fan, the condenser on the cooling air suction side of the condenser is limited by the rotation of the cooling fan. The high-temperature cooling air that has cooled the air is smoothly guided to the gap between the condenser and the cooling duct, and the low-temperature cooling air that has flowed through the gap between the condenser and the cooling duct on the cooling air suction side of the condenser is smoothly condensed. Can lead to. Therefore, the heat exchange efficiency on the cooling air discharge side of the condenser can be further increased, and the heat dissipation efficiency of the condenser can be increased.
[0053]
In addition, by increasing the fin pitch of the condenser in the part where the gap between the condenser and the cooling duct where the cooling air flows and pressure loss increases and the gap between the cooling duct is wide, the increase in pressure loss is prevented and the cooling air volume is reduced. Can be prevented. Therefore, it is possible to prevent a decrease in the heat dissipation amount of the condenser.
[Brief description of the drawings]
1 is a longitudinal sectional view of a refrigerator according to claim 1 of the present invention. FIG. 2 is a longitudinal sectional view of a refrigerator according to claim 2 of the present invention. FIG. 3 is a longitudinal sectional view of a refrigerator according to claim 3 of the present invention. FIG. 4 is a cross-sectional view of a refrigerator according to claim 4 of the present invention. FIG. 5 is a vertical cross-sectional view of a conventional refrigerator. FIG. 6 is a cross-sectional view of a conventional refrigerator.
3, 8 Cooling fans 5, 10 Condensers 7, 9 Cooling duct 11 Evaporating dish 12 Air guider

Claims (2)

A condenser, a cooling fan for cooling the condenser, and the condenser inside; on the suction side of the condenser, the gap on either the upper side or the lower side of the condenser is wide; on the discharge side of the condenser When a cooling duct having a wide gap in the direction opposite to the suction side and a wide gap between both the upper and lower sides is provided, and the rotation direction of the cooling fan rotates in the direction away from the condenser below the cooling fan If the suction side of the condenser widens the upper gap, the discharge side widens the lower gap, and the cooling fan rotates in the direction away from the condenser above the cooling fan, the condenser A refrigerator with a wide lower gap on the suction side and a wide upper gap on the discharge side. A condenser, a cooling fan for cooling the condenser, and the condenser inside; on the suction side of the condenser, the gap on either the upper side or the lower side of the condenser is wide; on the discharge side of the condenser A cooling duct with a wide gap in the opposite direction to the suction side and a wide gap between both the upper and lower cooling ducts is provided, and a gap between the condenser fin or wire or pipe in the wide gap between both the upper and lower cooling ducts is provided. Refrigerator made wider than the part.

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