JP3647727B2 - Cooling storage - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a cooler chamber in a cooling storage.
[0002]
[Prior art]
As one type of refrigerator, a cooler chamber is formed on the upper surface of the refrigerator main body, a cooler connected to the freezer and a cooling fan are provided therein, and when the freezer and the cooling fan are driven, It is known that the internal air is drawn into the cooler chamber and a circulating flow is generated in which the cool air generated while passing through the cooler is blown into the refrigerator, thereby cooling the interior. . Here, in recent years, as the above-described cooler chamber, a material formed using polystyrene foam as a material has been provided due to its excellent heat insulation and light weight.
On the other hand, although it is necessary to defrost appropriately in the cooler, an off-cycle method and a hot gas method have been mainly employed as conventional defrosting means of a type in which the cooler chamber is formed of foamed polystyrene. Of these, the off-cycle method has a low defrosting capability because the heat source can only obtain the cooling fan level, and the hot gas method requires a separate refrigerant circuit for flowing hot gas, although it has excellent defrosting capability. However, the structure is complicated and it takes a lot of man-hours for assembly, which causes an increase in manufacturing costs. Therefore, even in the type in which the cooler chamber is formed of polystyrene foam, the defrosting efficiency is good and the structure can be simplified. Therefore, means for installing a heater in the cooler has been adopted.
[0003]
[Problems to be solved by the invention]
However, when the cooler is equipped with a heater, a part of the heater may protrude from the cooler for design reasons. Since the protruding portion of the heater is not in contact with the fins of the cooler, it can be hotter than other heat generating portions of the heater when energized during defrosting. On the other hand, since the protruding portion of this heater is also a location close to the wall surface of the cooler chamber, the wall surface may be deformed or melted by heat, particularly when the wall surface is formed of expanded polystyrene as described above. .
The present invention has been completed based on the above circumstances, and an object thereof is to protect the wall surface of the cooler chamber from the heat of the heater equipped in the cooler.
[0004]
[Means for Solving the Problems]
As means for achieving the above-mentioned object, the invention of claim 1 is characterized in that a cooler chamber made of a synthetic resin is attached to the storage body, and the cooler is accommodated in the storage body by a cooler housed in the cooler chamber. Is circulated and supplied to the cooler in which the heater is equipped with a defrosting heater, and diffuses and dissipates heat between the heater and the wall of the cooler chamber by receiving heat from the heater. A heat dissipating member is interposed , and this heat dissipating member has a frame shape that can be fitted to the lower side of the cooler, and covers a portion of the heater that protrudes from the end plate of the cooler. It is characterized in that it has a structure in which a rising plate portion is formed .
According to a second aspect of the present invention, in the first aspect of the present invention, a drain pan for receiving and draining defrosted water from the cooler or the like is disposed on the lower surface side of the cooler. The heating part protruded from the member is characterized by being provided facing the drain pan.
[0005]
[Action and effect of the invention]
<Invention of Claim 1>
Even if the heater is energized and a high-temperature part is created, the heat from it is received by the heat dissipating member and diffused and dissipated around it. Therefore, it is avoided that the wall surface of the cooler chamber is locally heated, and thermal deformation or the like is prevented.
<Invention of Claim 2>
Part of the heat received by the heat dissipating member is transmitted to the heating unit, the inside of the drain pan is heated, and ice blocks and the like in the drain pan are melted.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, the code | symbol 10 is the refrigerator main body which consists of a heat insulation box, Comprising: While the inside is used as the storage chamber 11, the cooler chamber 20 is provided in the upper surface. As shown in FIG. 2, the cooler chamber 20 is formed by covering a styrene foam base 21 with a cover 22 having a dome shape made of polystyrene foam, and a cooler 25 (evaporator) inside. Can be accommodated. The bottom of the cooler chamber 20 is fitted into the mounting hole 24 of the mounting base 23, and the mounting base 23 is mounted on the ceiling surface 12 of the refrigerator main body 10, thereby opening the ceiling surface 12. It is installed so as to cover the upper part of 13.
[0007]
The cooler 25 is installed at a substantially central portion in the left-right direction in the cooler chamber 20. As shown in FIG. 2, the cooler 25 is formed in a block shape that is elongated in the depth direction as a whole, with the evaporation pipes 27 penetrating through the fins 26 arranged side by side in a meandering manner. It is circulated and connected by a refrigerant pipe (not shown) installed on the mounting base 23 and a refrigerant pipe to constitute a known refrigeration cycle.
[0008]
A defrosting heater 30 is attached to the outer surface of the cooler 25. The heater 30 is provided, for example, at the lower ends of the left and right surfaces of the cooler 25 so as to face in the front-rear direction in a state of being bent in a hairpin shape. The end portion slightly protrudes from the front or rear end plate 31. A thermostat 32 is attached to estimate the completion of defrosting.
From the lower ends of the front and rear end plates 31 described above, the mounting plates 33 are formed by being bent at right angles to the outside, and two mounting holes 34 are formed. Further, a protection plate 36 that protrudes forward or backward is provided from the upper part of the left and right side edges of the front end plate 31 and the upper part of the right side edge of the rear end plate 31.
[0009]
A rib 40 is formed on the peripheral edge of the upper surface of the base 21, and the rib 40 can be fitted into a mounting groove 41 provided around the lower edge of the cover 22. A suction port 43 is formed on the right end side of the base 21, and an air outlet 44 is formed on the left end side. Two cooling fans 45 are arranged in the frame body 46 at the air outlet 44. Equipped in state.
A drain pan 48 for receiving defrost water from the cooler 25 and the like is disposed between the suction port 43 and the blower outlet 44 in the base 21, that is, at the installation position of the cooler 25. The drain pan 48 has a shape that gradually increases in depth toward the central portion, and is formed with a band-shaped bottom surface 49 facing in the front-rear direction, and a drain port 50 is provided in the back thereof.
Further, two receiving projections 52 that can be fitted into the mounting holes 34 of the mounting plate 33 provided in the cooler 25 are provided on both front and rear edges of the drain pan 48.
[0010]
Now, a heat dissipating member 55 is fitted around the lower side of the cooler 25. The heat radiating member 55 is made of a metal plate having excellent thermal conductivity such as aluminum. Specifically, the main body 56 has a frame shape that matches the upper surface of the drain pan 48 described above, and a positioning hole 58 through which the receiving projection 52 of the drain pan 48 can be inserted is provided in the front and rear frames 57. Two pieces are formed. On the left and right side edges of the main body 56, a short side plate 60 is formed, and a tall end plate 61 is erected from the front and rear edges, and the above-described cooler 25 is fitted therein. It is supposed to be. Note that the left end edge of the rear end face plate 61 is extended.
On the left side edge of the end face plate 61 on the near side and the right side edge of the end face plate 61 on the back side, the shielding plate 63 is inward from a position immediately above the side face plate 60 to a position slightly below the upper edge of the end face plate 61. It is formed by being bent at a right angle. Further, a tall shielding plate 63 is similarly bent at a right angle inward from the position directly above the side plate 60 to the upper edge of the end plate 61 on the right side edge of the end plate 61 on the near side.
[0011]
Then, the effect | action of this embodiment is demonstrated. First, the cooler chamber 20 is assembled as follows. When the base 21 is prepared, the heat radiating member 55 is placed on the drain pan 48 while receiving the positioning hole 58 and fitting into the protrusion 52. Next, the cooler 25 is fitted inside the heat radiating member 55 while fitting the mounting hole 34 of the mounting plate 33 into the receiving protrusion 52 protruding from the positioning hole 58 of the heat radiating member 55. Here, the lower end portion of the cooler 25 is surrounded by the left and right side plates 60, the front and rear end plates 61 and the shielding plate 63 in the heat dissipation member 55, and is accommodated without rattling.
Further, as shown in FIG. 3, the front portions of the front and rear ends of the heater 30 are blocked by the end face plate 61 of the heat dissipation member 55. Further, the gaps below the protective plate 36 provided at the three corners of the cooler 25 are respectively closed by the shielding plates 63 provided at the corresponding three positions of the heat dissipation member 55.
[0012]
Next, the cover 22 is covered so as to cover the upper surface of the base 21 while fitting the mounting groove 41 to the rib 40, and the cooler chamber 20 is assembled as shown in FIG. The assembled cooler chamber 20 is installed so as to close the opening 13 of the ceiling surface 12 of the refrigerator body 10 after being fitted to the mounting base 23.
Even if the cooler 25 rattles in the cooler chamber 20 after the cooler chamber 20 is installed, the heat radiating member 55 disposed around the cooler chamber 20 serves as a protective member and may damage the cover 22. It is prevented.
[0013]
During the cooling operation, when the refrigeration apparatus and the cooling fan 45 are driven, the internal air is drawn into the cooler chamber 20 from the suction port 43 and heat is passed while passing through the cooler 25 from right to left in FIG. Cold air is generated by the exchange. The cold air is blown into the storage chamber 11 through the air outlet 44, and then a circulation flow is generated such that the cold air flows toward the suction port 43, thereby cooling the inside of the storage chamber 11.
At this time, since the shielding plate 63 provided on the heat radiating member 55 closes the gap below the protective plate 36 formed in the cooler 25, the air introduced into the cooler chamber 20 is efficiently cooled. This increases the cooling capacity.
Further, at the time of the cooling operation, for example, the U-shaped end portion of the heater 30 is frosted and may grow, but the growth is blocked by the end face plate 61 of the heat radiating member 55. Therefore, icing between the end portion of the heater 30 and the cover 22 is prevented, the work of disassembling the cooler chamber 20 in maintenance or the like can be facilitated, and damage to the cover 22 is also prevented. .
[0014]
On the other hand, when the defrosting operation is performed, the heater 30 provided in the cooler 25 generates heat when energized, and the frost attached to the cooler 25 and the like melts and falls toward the drain pan 48. The defrosted water that has fallen is collected on the bottom surface 49 and then drained to the outside through the drain port 50.
When the heater 30 generates heat upon defrosting, the two ends that protrude particularly do not come into contact with the fins 26 of the cooler 25, so that the heat becomes high. After being received by the face plate 61, the heat is dissipated around the heat radiating member 55 while being transmitted to the entire area. As a result, it is avoided that the cover 22 constituting the wall surface of the cooler chamber 20 is locally heated and is prevented from being thermally deformed or melted.
In addition, when the temperature in the vicinity of the cooler 25 becomes equal to or higher than the predetermined temperature, the thermostat 32 is cut off and the energization to the heater 30 is released, thereby completing the defrosting operation.
[0015]
As described above, in the present embodiment, a heat radiating member made of a metal plate having excellent thermal conductivity between the defrosting heater 30 provided in the cooler 25 and the cover 22 constituting the cooler chamber 20. Since 55 is interposed, even if the end of the heater 30 or the like becomes hot, the heat from there is received by the heat radiating member 55 and diffused and radiated around it. Therefore, it is avoided that the cover 22 is locally heated, and it is possible to prevent thermal deformation and melting.
[0016]
Second Embodiment
4 and 5 show a second embodiment of the present invention. In the second embodiment, a heating part 70 is added to the heat radiating member 55A.
Specifically, as shown in FIG. 4, the heating unit 70 protrudes slightly from the inner edge of the central portion in the width direction of the frame 57 on the back side of the main body portion 56 of the heat radiating member 55 </ b> A, and is below a predetermined dimension. It is turned and bent to extend toward the front side. When the heat dissipating member 55 </ b> A is incorporated in the cooler chamber 20, the heating unit 70 is arranged to face directly above the bottom surface 49 of the drain pan 48 as shown in FIG. 5.
Other structures are the same as those in the first embodiment, and portions having the same functions are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted.
[0017]
In the second embodiment, when the heat dissipation member 55A receives heat from the heater 30 during the defrosting operation, part of the heat is transmitted to the heating unit 70, and the vicinity of the bottom surface 49 of the drain pan 48 is heated. The ice block accumulated on the bottom surface 49 is melted. As a result, the drainage port 50 can be prevented from being clogged, and the drainage can be performed smoothly. Further, it is possible to prevent the occurrence of a situation in which freezing grows as the ice reaches the cooler 25 and the cooling capacity is lowered.
[0018]
<Other embodiments>
Note that the following may be employed as means for firmly and easily attaching the cooler chamber 20 to the mounting base 23.
In the example shown in FIG. 6, the left and right metal bands 72 are hung on the assembled cooler chamber 20, and the hem portion of each metal band 72 is fixed to the mounting base 23 with screws 73. In this method, although the structure is simple, the space between the base 21 and the cover 22 is filled with no gap, and airtightness can be secured. On the other hand, in maintenance or the like, the cooler chamber 20 can be easily disassembled simply by removing the screw 73.
The number of the metal bands 72 is arbitrary. Further, if the back surface of the metal band 72 is roughened by making irregularities or the like, the fixing force is increased, which is effective for preventing deviation.
Further, as shown in FIG. 7, while passing through the insertion hole 75 opened at the rim of the mounting hole 24 of the mounting base 23, the resin band 76 is hung doubly from the upper surface of the cooler chamber 20 to the front and rear side surfaces, The resin band 76 may be fastened and attached by the fastener 77.
[0019]
Further, when attaching the heat dissipating member 55 and the cooler 25 on the drain pan 48 of the base 21, the following may be performed.
In the example shown in FIG. 8, after the cooler 25 is fitted to the heat radiating member 55 and fixed with screws or the like, the leg portion 80 that protrudes outward from the front and rear frames 57 of the main body portion 56 of the heat radiating member 55 is formed as a drain pan. It is structured to be locked to a locking rod 81 provided on the upper surface of 48.
In the example shown in FIG. 9, the front and rear leg portions 80 of the heat radiating member 55 are similarly fitted and locked in locking grooves 82 provided in the drain pan 48.
Furthermore, the present invention can be implemented with various modifications without departing from the scope of the invention.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view from the front of an arrangement part of a cooler chamber according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the cooler chamber. 4 is a perspective view of a heat dissipation member according to the second embodiment. FIG. 5 is a side sectional view of the cooler chamber. FIG. 6 is a perspective view showing an example of a fixing structure of the cooler chamber. Sectional view [Fig. 8] Partially cutaway side view showing an example of the heat dissipation member mounting structure [Fig.9] Partially cutaway side view showing other examples [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Refrigerator body 11 ... Storage room 20 ... Cooler room 21 ... Base 22 ... Cover 25 ... Cooler 30 ... Heater 48 ... Drain pan 49 ... Bottom surface 55 (of the drain pan 48) ... Radiation member 61 ... End face plate 55A ... Radiation plate 70 ... heating unit

Claims (2)

A cooler chamber made of synthetic resin is attached to the storage body, and cool air is circulated and supplied into the storage body by a cooler housed in the cooler chamber, and a heater for defrosting is provided in the cooler. In the cooled storage
Between the heater and the wall portion of the cooler chamber, a heat radiating member that diffuses and dissipates heat by receiving heat from the heater is interposed ,
The heat radiating member has a frame shape that can be fitted to the lower side of the cooler, and a structure in which a plate portion that rises so as to cover the portion of the heater that protrudes from the end plate of the cooler is formed. cooling storage, characterized in that it.   A drain pan for receiving and draining defrosted water from the cooler or the like is disposed on the lower surface side of the cooler, and a heating portion protruding from the heat radiating member faces the drain pan. The cooling storage according to claim 1, wherein the cooling storage is provided.

Images