JP3831620B2 - refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator including an evaporator for cooling a storage room such as a freezer room or a refrigerator room at the rear part of the storage room.
[0002]
[Prior art]
A refrigerator provided with an evaporator at the rear of the freezer is described in, for example, Japanese Patent Laid-Open No. 9-61040.
[0003]
In the refrigerator described in this publication, the inside of the heat insulation box is partitioned into a plurality of storage rooms such as a freezer compartment and a refrigerator compartment, and a cold air passage is formed at the rear of the freezer compartment, and the air passage is viewed from the side. And a vertically long evaporator.
[0004]
Another refrigerator is demonstrated based on FIG.5 and FIG.6.
5 and 6, 51 is a refrigerator. The refrigerator 51 forms an upper freezer compartment 54 and a lower refrigerator compartment 55 by partitioning the heat insulating box 52 with a partition 53.
56 is a cool air ventilation path formed at the rear of the freezing chamber, 57 is a vertically long evaporator disposed in the ventilation channel, 58 is a blower disposed above the evaporator, and 59 is a back plate 67 of the freezing chamber 55. An air outlet 60 formed at the bottom is a suction port formed on the bottom plate 66 of the freezer compartment 55.
Reference numeral 61 denotes a cold air communication passage formed in the partition 53, which communicates the suction port 60 and the lower front side of the ventilation passage 56. Reference numeral 63 denotes a defrosting heater attached to the evaporator 57, which is arranged at the center on the front side of the evaporator and slightly below. Reference numeral 66 denotes a bottom plate, and 67 denotes a back plate. Both the back plate and the bottom plate are detachably attached. Reference numerals 68 and 69 denote passage forming members for forming the bottom side and the top side of the communication passage 61, and are detachably attached in the same manner as the back plate and the bottom plate.
[0005]
In addition, although the suction inlet and the blower outlet are formed also in the refrigerator compartment 55, it is not illustrated.
[0006]
In the refrigerator 51, in order to facilitate maintenance of the accessory parts of the evaporator 57 (for example, a defrost heater 63 and a temperature detection sensor for defrost control), a bottom plate 66, a back plate 67, and The passage forming members 68 and 69 are detachably attached.
Therefore, when the bottom plate 66, the back plate 67, and the passage forming members 68 and 69 are removed, the front side of the evaporator 57 is widely opened.
[0007]
However, since only the front side of the evaporator 57 is opened, it cannot be said that maintenance is easy when performing maintenance on both sides and the rear side.
When a defrost heater is attached to the lower part or the lower end part of the evaporator 57, it is expected that the position becomes difficult to reach and maintenance is difficult.
[0008]
[Problems to be solved by the invention]
The present invention provides a refrigerator that facilitates maintenance of an evaporator and its accessory parts.
[0009]
[Means for Solving the Problems]
The present invention divides the inside of the heat insulation box with a partition, forms storage chambers above and below the partition, and arranges a detachable back plate at the rear of the upper storage chamber to form a ventilation path, and in this ventilation path an evaporator disposed in a refrigerator which the cold air passage to the evaporator with a detachable path forming member that forms together with the partition, when removed the passage forming member and the back plate, said evaporator The rear part of the partition is inclined so that the lower part of the evaporator can be rotated with the upper part as the rotation center .
Further, the present invention partitions the inside of the heat insulation box with a partition to form a storage room such as a freezer compartment or a refrigeration room above and below, and a removable back plate is disposed at the rear of the upper storage compartment to form a ventilation path. The evaporator is disposed in the ventilation path, and the suction port and the outlet are formed in the storage chamber, and the cool air from the inlet is cooled by the evaporator and blown out from the outlet. In the refrigerator, the partition is composed of a front part extending in the horizontal direction and a rear part whose rear side is inclined downward, and the evaporator is arranged so that a part thereof is located on the side of the rear part, and the suction port A passage-forming member comprising a communication passage from the evaporator to the evaporator and a rear portion of the partition, which is detachable, and the rear portion of the partition is moved to the lower portion of the evaporator when the evaporator is moved obliquely upward. Located outside the moving range of this evaporation If a shape which does not touch the bottom, or at a guide portion for guiding the lower obliquely forward on when the lower portion of the evaporator is in contact those formed in the rear of the partition.
[0010]
Further, the rear part of the partition is used as a drain receiver for receiving drain from the evaporator.
[0011]
In addition, the evaporator includes a plurality of heat transfer fins and heat transfer tubes for exchanging heat with these heat transfer fins, and a refrigerant tube connected to a compressor or a condenser is located above or adjacent to the upper side of the evaporator. To the heat transfer tube.
[0012]
Furthermore, a defrosting heater is attached to the lower or lower end of the evaporator.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.
[0014]
1 is a refrigerator. In this refrigerator 1, the heat insulating box 2 is partitioned by a partition 3, so that an upper freezer room (for example, a storage room controlled to about −20 ° C.) 4 and a lower refrigerator room (for example, a storage controlled to about 3 ° C.). Room) 5.
3A is a horizontal part of the partition 3, and 3B is an inclined part (a rear part of the partition).
Reference numeral 6 denotes a ventilation path, which is formed vertically in the rear part of the freezer compartment. The inclined portion 3B also functions as a member for forming a cold air passage.
Reference numeral 7 denotes a vertically long evaporator as viewed from the side disposed in the ventilation path. 8 is a blower. 9 is an outlet, 10 is a suction port on the bottom side, and 11 is a suction port on the back side. A partition member 12 partitions the suction side (primary side) and the discharge side (secondary side) of the evaporator.
13 is a baffle plate, and is arranged on the suction side of the evaporator 7 in order to make the cold air on the suction side of the evaporator 7 substantially equal.
[0015]
Reference numeral 14 denotes an opening formed in the rectifying plate, which guides cold air to the front side of the evaporator 7. Reference numeral 15 denotes an opening formed in the rectifying plate for guiding the cold air to the lower side and the rear side of the evaporator 7.
[0016]
As shown in FIG. 2, the evaporator 7 mainly includes a plurality of heat transfer fins 21, a meandering heat transfer tube 22 that exchanges heat with these many heat transfer fins 21, and side portions of the heat transfer fins 21. It is comprised with the attached tube sheet 23. FIG.
[0017]
Reference numeral 24 denotes a notch formed in the tube plate 23, to which the defrost heater 41 is attached from the front side. Note that an electric heater such as a glass tube heater is used as the defrosting heater 41, and it is also used as a so-called deodorizing heater that decomposes odor in cold air together with defrosting.
[0018]
A shielding plate 26 is mainly composed of a horizontal portion 27, an inclined portion 28, and a vertical portion 29. 30 is an opening formed in the horizontal portion, and 31 is an opening formed in the inclined portion. Reference numeral 33 denotes a refrigerant pipe extending from above and connected to the heat transfer pipe, and the other end is connected to a compressor and a condenser. Although only the position is illustrated, a temperature fuse is attached to a position 34 on the lower left side of the evaporator 7.
[0019]
The evaporator 7 has a refrigerant circuit in which a compressor, a condenser, and a pressure reducing device are annularly connected by a refrigerant pipe. However, illustration of each device other than the evaporator 7 is omitted. Further, this refrigerant circuit is filled with, for example, R134a as a refrigerant.
[0020]
3 is a bottom plate of the freezer compartment 4. Reference numeral 46 denotes a back plate. Reference numeral 47 denotes a passage forming member on the side close to the evaporator, which is detachably attached.
Further, as shown in FIG. 4, the position and the shape of the inclined portion 3B are set so that the upper portion 7A of the evaporator 7 is set as the rotation center point, or the upper portion of the evaporator can be moved slightly, so that the portions other than this portion are arranged. When the lower portion 7B is moved obliquely forward upward with the rotation center point, the position is such that it does not hit the upper surface of the inclined portion 3B (used as a drain receiver). Reference numeral 50 denotes a communication passage formed by the inclined portion 3B and the removable passage forming member 47 through which the cold air passes.
[0021]
In addition, as an accessory part of the evaporator 7, the connector (not shown) which connects the said defrost heater 41, the temperature fuse which is not shown in figure, and these and the electric wire from a board | substrate, or a defrost sensor (a plurality is installed). (Not shown). When performing maintenance such as inspection and replacement of these accessory parts, it is necessary to expose the evaporator 7, and if possible, it is possible to look over to the back side, and if maintenance space around it can be secured, maintenance is very easy. Is.
[0022]
In the refrigerator 1 configured as described above, when the evaporator 7 or the accessory is maintained, the following procedure is performed.
[0023]
First, the back plate 46 and the bottom plate 45 of the freezer compartment 4 are removed. And the baffle plate 13 and the channel | path formation member 47 of a communicating path are removed.
When the blower 8 is removed, there is no obstacle in the maintenance above the evaporator 7 or diagonally forward. At this time, since the refrigerant pipe 33 is connected to the evaporator 7 from above, the upper part 7A cannot be moved forward greatly, but the lower part 7B of the evaporator 7 can be moved diagonally forward.
[0024]
For this reason, when the lower portion 7B is rotated forwardly with the upper portion 7A of the evaporator 7 as a substantially rotation center point (see FIG. 4), the evaporator 7 is easily maintained.
At the same time, the defrost heater 41, which is disposed at the lower part of the evaporator 7 and is difficult to perform maintenance only by exposing the front part, can be moved to a position where it can be easily maintained by moving the lower part 7B forward. In addition, since a maintenance space can be secured around the lower portion 7B, maintenance can be easily performed.
[0025]
In the refrigerator described in this embodiment, the storage chambers are arranged side by side up and down, and the upper and lower storage chambers are cooled by one evaporator, so the evaporator is close to the partition, That is, it is arranged near both storage rooms, and this configuration is adopted because it is not necessary to lengthen the duct for sending cold air.
[0026]
In addition, in order to increase the volume of each storage room while maintaining the same depth dimension as that of the conventional refrigerator, it is necessary to narrow the ventilation path. Under these conditions, the capacity of the cooler is equivalent to that of the conventional one. In order to ensure this, the evaporator must be made vertically long when viewed from the side.
When the evaporator is vertically long, it cannot be accommodated only behind the upper storage chamber, and the lower end of the evaporator extends to the rear of the lower storage chamber. For this reason, the lower end of the evaporator is arranged below the bottom plate of the upper storage chamber.
[0027]
In this embodiment, the example in which the freezer compartment is provided on the upper side and the refrigerator compartment is provided on the lower side has been described. You may apply to. Further, the present invention may be applied to all storage rooms that are refrigerated rooms or freezer rooms.
[0028]
In this embodiment, the lower part 7B of the evaporator 7 is rotated so that the lower end of the evaporator 7 does not protrude from the rear part of the partition, but naturally the lower end of the evaporator may slightly touch the partition. Even if it hits, since the evaporator 7 is not fixed, the evaporator 7 moves upward by a small distance, and the lower part 7B of the evaporator 7 can be rotated.
[0029]
【The invention's effect】
According to the present invention, the lower part of the evaporator 7 can be pulled forward during maintenance, and workability is improved.
[0030]
According to the invention described in claim 3, since the evaporator used is a refrigerant pipe connected to a compressor or a condenser and connected to the heat transfer pipe from above or from the upper side, the evaporation pipe is used. Although the upper part of the evaporator is connected to the refrigerant pipe and cannot be moved, the lower part can be moved diagonally forward and the work space for maintenance can be secured around the evaporator. Can be easily maintained.
[0031]
Further, according to the invention described in claim 4, although the evaporator has a defrost heater attached to the lower part or the lower end part and has a structure in which these are difficult to maintain, the passage forming member And the back plate can be removed and the lower part of the evaporator can be moved diagonally forward to make it easier to maintain the defrost heater, so that the height dimension is suppressed and the evaporator and partitions are complicated Even in a refrigerator that is considered difficult to maintain, a space for maintenance can be secured around the evaporator, and the evaporator and its accessory parts can be easily maintained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a refrigerator of the present invention with a door and a compressor omitted.
FIG. 2 is a perspective view showing an evaporator and a defrosting heater of the refrigerator.
FIG. 3 is a cross-sectional view showing a main part of the refrigerator.
FIG. 4 is an explanatory view showing a state during maintenance of an evaporator and accessory parts of the refrigerator.
FIG. 5 is a cross-sectional view showing a main part of a conventional refrigerator.
FIG. 6 is a cross-sectional view showing a state during maintenance of an evaporator and accessory parts of the conventional refrigerator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Heat insulation box 3 Partition 3B Inclined part (drain receptacle, partition rear)
4 Freezing room (storage room)
5 Cold room (storage room)
6 Ventilation path 7 Evaporator 7A Upper part of evaporator 7B Lower part of evaporator 8 Blower 10 Suction port 21 Heat transfer fin 33 Refrigerant tube 41 Defrost heater 45 Bottom plate 46 Back plate 47 Passage forming member

Claims (4)

The heat insulation box is partitioned by a partition, storage chambers are formed above and below the partition, a removable back plate is arranged at the rear of the upper storage chamber to form a ventilation path, and an evaporator is disposed in the ventilation path And a refrigerator provided with a detachable passage forming member that forms a cold air passage to the evaporator together with the partition,
The refrigerator is characterized in that when the back plate and the passage forming member are removed, the rear part of the partition is inclined so that the lower part of the evaporator can be turned around the upper part of the evaporator. .   The refrigerator according to claim 1, wherein a rear portion of the partition is used as a drain receiver that receives drain from the evaporator.   The evaporator includes a plurality of heat transfer fins and heat transfer tubes for exchanging heat with the heat transfer fins, and a refrigerant tube connected to a compressor or a condenser from above the evaporator or from the side of the upper portion. The refrigerator according to claim 1 or 2, wherein the refrigerator is configured to be connected to a heat transfer tube.   The refrigerator according to any one of claims 1 to 3, wherein a defrosting heater is attached to a lower part or a lower end part of the evaporator.

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