JP3686463B2 - refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator.
[0002]
[Prior art]
4, 5, and 6, reference numeral 20 denotes a heat exchanger installed in the cooling chamber 22 in the refrigerator main body 21. The cooling chamber 22 communicates with the refrigeration and freezing chamber 24 through the air passage 23, and the cooling air flow is sent to the refrigeration and freezing chamber 24 by the cooling fan 25. The heat exchanger 20 is configured by combining a large number of fins 26 arranged in parallel and a refrigerant pipe 27 bent in a meandering manner. The fin 26 is a rectangular plate having a short side horizontally and a long side vertically, and a large number of through holes 28 are provided therethrough. 29 is an airflow flowing into the cooling chamber 22 and is indicated by a white arrow.
[0003]
The airflow 29 is blown into the cooling chamber 22 from the lower central portion of the heat exchanger 20 and is cooled by contacting each portion of the heat exchanger 20. And the moisture adheres to the heat exchanger 20 as frost. In many cases, the frost partially adheres to the fins 26 and the refrigerant pipe 27 in the form of a lump or bridge. Since the frost that adheres in the form of a lump or bridge is larger than the frost that adheres to the surfaces of the fins 26 and the refrigerant pipe 27, it is not uniformly defrosted even if defrost heating is performed. Eventually, the cooling efficiency of the heat exchanger 20 is deteriorated. In order to prevent the block-like frost formation and the bridge-like frost formation, as shown in FIG. 6, the fin 26 has a through-hole 28 including the end portion. It was not possible to sufficiently prevent bridge-like frost formation.
[0004]
[Problems to be solved by the invention]
The conventional problem to be solved by the present invention is that a conventional heat exchanger fin is simply provided with a through-hole, so that a mass or bridge-like frost formation is a part of the heat exchanger. It was difficult to form the same surface frost on the entire heat exchanger.
[0005]
[Means for Solving the Problems]
In the cooling chamber in the refrigerator body of the present invention, the heat exchanger constituted by a combination of a large number of fins and a meandering refrigerant pipe is disposed in a state where one side thereof is raised upward and inclined as a whole. The airflow blown through the air passage from the refrigeration and freezing compartment to the cooling compartment is blown into the lower side of the one side that has been raised upward.
[0006]
Therefore, the air stream containing moisture in the refrigerator compartment or freezer compartment is blown from below into the upwardly raised part of one side of the heat exchanger, and forms frost from the upwardly upward part of the heat exchanger to the vicinity of the center. To do. On the other hand, on the other side that has not risen upward, liquid refrigerant accumulates in the refrigerant pipe, particularly in the bent portion, so that frosting occurs from the other side that has not risen upward due to airflow diffusion to the vicinity of the center of the heat exchanger. .
[0007]
As described above, by disposing the heat exchanger in an inclined manner, the heat exchanger eventually forms frost from both sides to the vicinity of the center as a whole, so that the frost is made uniform. .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a heat in which a large number of fins are juxtaposed in the vertical direction, and the fins are arranged in a meandering manner and are combined with refrigerant pipes having bent portions at both ends. The exchanger is placed in the cooling chamber inside the refrigerator body with one side raised upward and inclined as a whole, and cooled from the refrigerator and freezer compartment below the one side raised upward of the heat exchanger. The airflow blown through the air passage is blown into the chamber, and the moisture in the airflow blown into the cooling chamber adheres as frost from one side of the heat exchanger rising upward to the vicinity of the center, In addition, the frost due to the air flow diffusion of the liquid refrigerant that particularly accumulates at the bent portion of the refrigerant pipe that is inclined and lower is attached from the lower portion of the heat exchanger to the vicinity of the center.
[0009]
For the above reason for frost formation, frost formation is made uniform in the heat exchanger. Therefore, it is easy to remove frost uniformly by defrost heating.
[0010]
The invention according to claim 2 is a heat exchange in which a large number of fins are arranged in the vertical direction, and the fins are arranged in a meandering manner and are combined with refrigerant pipes having bent portions at both ends. The cooler is disposed in a cooling chamber in the refrigerator main body with one side thereof being lifted upward and inclined as a whole, and a plurality of air inlets for blowing air through the air passage to the cooling chamber are provided below the heat exchanger. The air flow is blown downward on one side raised upward from the inclined heat exchanger from the air flow blowing port with the larger flow rate among the air blowing ports. The airflow is blown from the airflow inlet to the lower side of the other side located below due to the inclination of the inclined heat exchanger.
[0011]
Therefore, in addition to the reason for frost formation in the invention of the first aspect, moisture contained in the airflow having a smaller flow rate is attached as frost from the lower slope of the heat exchanger to the vicinity of the center, and eventually the entire heat exchanger. The frost formation is made uniform, and the defrosting can be performed uniformly, not the partially large frost formation and the conventional bridge frost formation.
[0012]
(Embodiment 1)
Hereinafter, Embodiment 1 of the refrigerator according to the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a schematic diagram showing a simplified refrigerator structure according to Embodiment 1 of the present invention. 1 and 2, 1 is a heat exchanger, 2 is a plurality of fins, 3 is a refrigerant pipe bent in a meandering shape, 4 is a bent portion, and 5 is a side raised upward so that the heat exchanger 1 is inclined. 6 is an air flow including moisture returning from the refrigerator compartment, 7 is an air passage communicating with the refrigerator compartment that guides the air flow 6, 8 is an inclination angle of the heat exchanger, 9 is a cooling fan, 10 is a refrigerator body, 11 is a cooling chamber, 12 is a partition plate, 13 is a defrosting heater provided at the lower part of the heat exchanger 1, and 14 is a lower side of the heat exchanger 1 without being raised upward. A lower side portion 15, which is located, is a gap between the partition plate 12 and the heat exchanger 1.
[0014]
Details of the heat exchanger configured as described above will be described below.
When a refrigeration cycle (not shown) is activated and enters a cooling operation state, an airflow cooled by a cooling fan 9 to a refrigerating room or the like is sent to the airflow containing moisture in the interior or the like, and an air passage that guides the airflow 6 7, the air flow containing moisture returns to the upper side portion 5 of the heat exchanger 1. Since the returned airflow 6 enters the lower part of the heat exchanger 1 and the gap 15 between the heat exchanger 1 and the partition plate 12 so as to be blown in, the heat exchanger 1 has an upper side portion 5 on the side where the airflow flows in. The frost adheres uniformly to the edge of the fin 2 and the surface of the refrigerant pipe 3 in the vicinity of the center. On the other hand, since the upper side portion 5 of the heat exchanger 1 on the inflow side of the airflow 6 is inclined at an inclination angle 8, there is an excess in the lower side portion 14 on the other side of the heat exchanger 1 and the bent portion 4 of the refrigerant pipe. As the liquid refrigerant accumulates, frost is uniformly deposited on the edge of the fin 2 and the surface of the refrigerant tube 3 from the vicinity of the center of the heat exchanger 1 to the lower side portion 14 due to the influence of the diffusion phenomenon of the air flow. . Since frost is formed due to the effects described above, the heat exchanger 1 is less likely to form a block frost over time, and therefore there is little significant performance degradation. And if energization of the heater 13 for defrosting is carried out at fixed time intervals and it defrosts, the temperature rise in a refrigerator compartment can be suppressed low.
[0015]
As described above, the heat exchanger 1 according to the first embodiment does not cause massive frost formation unlike the conventional example, so that not only a rapid decrease in the heat exchange efficiency of the heat exchanger is prevented, but also the refrigerator. Since the temperature rise in the chamber can be suppressed low, the effect on energy saving is also great.
[0016]
(Embodiment 2)
Next, a second embodiment of the refrigerator according to the present invention will be described with reference to the drawings. In addition, about the same component as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0017]
FIG. 3 is a schematic diagram illustrating a simplified refrigerator according to the second embodiment of the present invention. In FIG. 3, the cooled airflow is sent to a plurality of refrigerating chambers and the like, and becomes airflow including moisture in a warehouse or the like, and the heat exchanger is passed through the air passages 7 and 16 that respectively guide the airflow without joining the airflow at one place. Airflow containing moisture returns from both sides of 1. Of the returned airflow, the larger airflow 6a having the larger airflow enters the lower portion of the upper side portion 5 inclined upward so as to be easily blown, and further enters the gap 15 between the heat exchanger 1 and the partition plate 12. The heat exchanger 1 is inclined to form an inclination angle 8. From the upper side portion 5 to the vicinity of the center of the heat exchanger 1, frost uniformly adheres to the edge of the fin 2 and the surface of the refrigerant tube 3. On the other hand, since excessive liquid refrigerant accumulates particularly in the bent portion 4 of the refrigerant pipe 3 in the lower side portion 14 of the heat exchanger 1 that is the inflow side of the smaller amount of airflow 6b with the smaller airflow rate, Due to the diffusion phenomenon and the influence of the other small amount of airflow 6 b blowing into the lower side part 14, frost uniformly adheres to the edge of the fin 2 and the surface of the refrigerant pipe 3 from the lower side part 14 to the vicinity of the center of the heat exchanger 1. Since frost is formed by this effect, the heat exchanger 1 is less likely to form block frost due to the passage of time and therefore has no significant performance degradation. And if energization of the heater 13 for defrosting is carried out at fixed time intervals and it defrosts, the temperature rise in a refrigerator compartment can be suppressed low.
[0018]
As described above, in the refrigerator according to the second embodiment, the air passages 7 and 16 of the large air flow 6a and the small air flow 6b do not join the air passage at one place even in the case where there are a large number of refrigerating rooms or freezer compartments and in a multi-temperature zone. Can be divided into Therefore, it is possible not only to prevent complication of the air passage due to air passage intersections and the like, and also to prevent a sudden decrease in heat exchange efficiency of the heat exchanger due to massive frost formation, but also to suppress a temperature rise in the refrigerator cabinet to a low level. Therefore, the effect on energy saving is great.
[0019]
【The invention's effect】
As described above, in the present invention, liquid refrigerant is forced to the frost formation by blowing the airflow from the upper side portion of the inclined heat exchanger and the bent portion of the refrigerant pipe toward the lower side portion of the heat exchanger. The heat exchanger is uniformly frosted by the effect of frost formation by airflow diffusion, preventing massive frost formation, preventing significant deterioration of the efficiency of the heat exchanger, and saving energy by shortening the defrost time And the temperature rise in the refrigerator can be suppressed low.
[0020]
Also, frosting by blowing a large amount of airflow with a large air flow rate from the upper side of the heat exchanger and the liquid refrigerant on the lower side of the other side of the heat exchanger are forcibly stored in the refrigerant pipe and its bent part, By defrosting the heat exchanger uniformly by the effect of frost formation by air flow diffusion and blowing of the other small amount of air flow, preventing partial block frost formation, preventing significant deterioration of the heat exchanger efficiency, defrosting The energy saving effect by shortening time and the temperature rise in the refrigerator can be suppressed low. Moreover, since the airflow is not captured in only one direction at the bottom of the heat exchanger, the airflow does not have to be merged into one place even in the return air passage of a refrigerator room having a plurality of temperature zones such as a specific temperature chamber. It is possible to design a wind path that does not occur and to increase the efficiency such as increasing the internal volume.
[Brief description of the drawings]
1 is a front view showing the structure of a first embodiment of a refrigerator according to the present invention. FIG. 2 is a side view of the refrigerator of FIG. 1. FIG. 3 is a front view showing the structure of a second embodiment of the refrigerator according to the present invention. FIG. 4 is a front view showing the structure of a conventional refrigerator. FIG. 5 is a side view of the same. FIG. 6 is a plan view of fins attached to a heat exchanger of a conventional refrigerator.
DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Fin 3 Refrigerant tube 4 Bending part 5 Upper side part 6 Air flow 6a Large air flow 6b Small air flow 7,16 Air path 8 Inclination angle 9 of a heat exchanger Cooling fan 10 Refrigerator main body 11 Cooling chamber 12 Partition plate 13 Removal Frost heater 14 lower side 15 gap

Claims (2)

A heat exchanger comprising a plurality of fins arranged side by side in a vertical direction and a combination of the fins and a refrigerant pipe having meandering shapes and curved portions on both side ends, with one side raised upward. It is arranged in the cooling chamber in the refrigerator body in a state of being inclined as a whole, and an air flow blown through the air passage from the refrigeration and freezing chamber to the cooling chamber is blown below the one side of the heat exchanger that has been raised upward. Refrigerator. A heat exchanger comprising a plurality of fins arranged side by side in a vertical direction and a combination of the fins and a refrigerant pipe having meandering shapes and curved portions on both side ends, with one side raised upward. It is arranged in the cooling chamber in the refrigerator main body in a slanted state as a whole, and a plurality of air inlets for the air flow blown into the cooling chamber through the air passage are provided below the heat exchanger. The air flow is blown from one side, which is raised upward from the air flow inlet of the larger air flow, to the upper side of the inclined heat exchanger, and the heat exchanger inclined from the air flow inlet of the lower air flow among the air blowing ports. A refrigerator in which an airflow is blown downward on the other side located below due to the inclination.

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