JP3942455B2 - Refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator such as a quick freezer.
[0002]
[Prior art]
Conventionally, what is shown in FIG. 7 is known as an example of a quick freezer. In this case, a storage chamber 2 is provided in a freezer main body 1 made of a heat-insulating box, and a cooler chamber 3 is formed on the right side in the figure. In the cooler chamber 3, a freezer 4 and a refrigerant pipe are provided. The circulator-connected cooler 5 has a structure in which the internal fan 6 is accommodated on the upper and lower sides at the center height position. When the freezer 4 and the internal fan 6 are driven, the internal air is cooled by the cooler. As a result, a circulating flow is generated in which the cool air generated by heat exchange while being sucked toward the heat exchanger 5 and passing through the cooler 5 is blown out into the storage chamber 2 by the upper and lower internal fans 6. The ingredients S and the like that are placed and stored in the storage chamber 2 are rapidly frozen.
On the other hand, in order to maintain the cooling capacity, it is necessary to appropriately perform a defrosting operation. Therefore, the cooler 5 has a surface facing the storage chamber 2 and a surface facing the opposite side wall 1R, respectively. A heater 8 is provided to melt the frost and ice adhering to the cooler 5 and the like by causing the heater 8 to generate heat, and the defrost water is received by the drain pan 9 and drained outside the warehouse.
[0003]
[Problems to be solved by the invention]
However, in this type of quick freezer, the inside of the refrigerator is cooled to a considerably low temperature such as −35 ° C. to −50 ° C. from the viewpoint of the purpose of use, so that frost formation is also severe. For this reason, it is necessary to use a relatively high capacity heater 8 for defrosting, which increases the temperature of the adjacent storage chamber 2 and may adversely affect the stored food S.
The present invention has been completed based on the above circumstances, and an object of the present invention is to enable efficient defrosting while suppressing temperature rise on the storage chamber side as much as possible.
[0004]
[Means for Solving the Problems]
請 Motomeko one aspect of the present invention, the refrigerator body, a storage room foodstuffs and the like are stored, a cooler is a cooler compartment that is provided in order to circulate supplying cool air to the storage chamber arranged laterally The capacity of the heater on the surface on the storage chamber side is a cooling chamber provided with heaters for defrosting on both the surface on the storage chamber side and the surface on the opposite side of the cooler. Is set to be smaller than the capacity of the heater on the opposite surface , and the heater on the opposite surface is provided at a lower position than the heater on the storage chamber side in the cooler. It has the characteristics.
[0005]
According to a second aspect of the present invention, in the first aspect of the present invention , the top plate is provided on the upper surface of the cooler so as to have a downward slope toward the wall surface opposite to the storage chamber. It has a characteristic where it exists .
According to a third aspect of the present invention, in the refrigerator main body, a storage chamber in which foods and the like are stored, and a cooler chamber in which a cooler is provided to circulate and supply cold air to the storage chamber are arranged in the horizontal direction. In the cooler provided with heaters for defrosting on both the storage chamber side surface and the opposite surface of the cooler, the capacity of the heater on the storage chamber surface is The upper surface of the cooler is set smaller than the capacity of the heater on the opposite surface, and the top plate is provided in a posture inclined downward toward the wall surface on the opposite side to the storage chamber. It has the characteristics in the configuration.
[0006]
[Action and effect of the invention]
<Invention of Claim 1>
After a specified capacity is secured by the sum of the heaters on both sides, the capacity of the heater on the side of the storage chamber is made smaller than that of the heater on the opposite side. While ensuring rapid defrosting, the temperature rise on the storage room side can be suppressed, and the quality of the ingredients in the storage room can be maintained well. In addition, since the heater having the larger capacity is disposed at a relatively low position, the entire cooler can be efficiently heated, and defrosting can be performed quickly and reliably.
[0007]
<Inventions of Claims 2 and 3>
During the defrosting operation, the internal fan or the like placed above the cooler and the ceiling surface of the cooler room are also heated, so that the frost attached thereto falls as a lump onto the top plate of the cooler. It can happen. At that time, the mass of frost slides toward the end opposite to the storage chamber following the inclination of the top plate, but a relatively large capacity heater is arranged on the end side, The mass of frost is quickly melted and dripped. In other words, since no frost mass or moisture remains on the top plate, the ice is not frozen when the cooling operation is restarted next time, and the ice mass is prevented from growing. As a result, it is possible to prevent the ice block from blocking the cool air passage and interfering with members such as an internal fan disposed in the cooler chamber.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, the case where it applies to a quick freezer is illustrated.
1 and 2, reference numeral 10 denotes a freezer body made of a vertically insulated heat insulating box with a front opening, which is supported by legs 11 provided at the four corners of the bottom, and the front opening has a central height. The upper and lower doors 13 are partitioned by the partition frame 12 at positions, and the heat insulating doors 14 are supported by the doors 13 so as to be swingable in the horizontal direction.
[0009]
As shown in FIG. 1, in the main body 10, a region slightly more than 2/3 on the left side when viewed from the front is a storage chamber 16, and the remaining region on the right side is a cooler chamber 17.
Shelf pillars 18 are erected at the four corners of the storage chamber 16, and in a posture in which a pair of rails 19 having an L-shaped cross section face each other, the same height is provided between the front and back shelf pillars 18 on both the left and right sides. It has been handed over to be supported. A pair of these rails 19 are arranged in a plurality of stages, and a tray 20 having a square shallow dish shape is put in and out of both the rails 19 forming a pair while placing both side edges thereof.
[0010]
In one cooler chamber 17, a cooler 22 is disposed at a substantially central height position, and internal fans 30 are attached to both upper and lower sides thereof.
As shown in FIG. 3, the cooler 22 is formed in a block shape as a whole by evaporating pipes 24 penetrating through the fins 23 arranged side by side in a meandering manner. More specifically, it has a depth dimension substantially equal to the depth of the cooler chamber 17 and a thickness (a dimension in the left-right direction in FIG. 1) that is a little more than half of the entrance of the cooler chamber 17. The cooler 22 has end plates 26 respectively stretched on the front side and the back side as viewed from the front, and a mounting plate 27 protruding from the end plate 26 is fixed to the right side wall 10 </ b> R of the main body 10. As a result, the cooler 22 is attached in a state of being separated from the right side wall 10R.
[0011]
The cooler 22 is circulated and connected to a refrigeration device 29 in a machine room 28 provided on the upper surface of the main body 10 by a refrigerant pipe, and a known refrigeration cycle is configured.
The upper and lower internal fans 30 are mounted with their respective motor housings 31 fixed to the right side wall 10R and facing the storage chamber 16 side. The internal fan 30 is housed in a fan case 32 opened on both upper and lower surfaces, and a bell mouth 33 is formed on the front surface of the fan case 32.
[0012]
Front covers 35 are stretched on the front surface of the cooler chamber 17 on both upper and lower sides of the partition frame 12. On the other hand, on the side surface of the cooler chamber 17 which is the boundary with the storage chamber 16, a cooler cover 37 and two upper and lower in-chamber fan covers 40 are stretched between the front and rear shelf columns 18. Yes.
The cooler cover 37 is disposed in front of the cooler 22 (on the left side in FIG. 1), and a large number of suction ports 38 are formed so as to be substantially aligned over the entire surface. The internal fan cover 40 is disposed in front of the upper and lower internal fans 30, and a cylindrical air outlet 41 that can be fitted into the bell mouth 33 is formed at the center of the back surface thereof. Is formed.
Each of the covers 37 and 40 is attached to the back shelf column 18 via a hinge 42 and is supported so as to be swingable toward the back surface of the storage chamber 16. The portion is fixed by screwing to the shelf column 18 on the near side.
[0013]
For defrosting, a surface 22A (hereinafter referred to as an inlet surface) facing the storage chamber 16 in the cooler 22 and a surface 22B (hereinafter referred to as an outlet surface) facing the right side wall 10R are: Heaters 45A and 45B are mounted, respectively. As shown in FIG. 3, these heaters 45 </ b> A and 45 </ b> B are formed to be bent in a zigzag shape in the vertical direction in a region having the same width dimension as the entrance surface 22 </ b> A or the exit surface 22 </ b> B and a slightly smaller height. ing.
[0014]
Here, the capacity of the heater 45A on the inlet surface 22A side is set smaller than that of the heater 45B on the outlet surface 22B side, for example, by reducing the wire diameter. A specified capacity corresponding to the cooler 22 is secured by combining the heaters 45A and 45B.
Further, as shown in FIG. 4, the heater 45B on the outlet surface 22B side is attached so that its lower edge is located near the lower edge of the outlet surface 22B, whereas the heater 45A on the inlet surface 22A side. Is attached to the inlet surface 22A with its lower edge aligned with a predetermined dimension H above the lower edge of the heater 45B on the outlet surface 22B side. In short, the heater 45B on the outlet surface 22B side is attached to the lower side by the height H than the heater 45A on the inlet surface 22A side.
[0015]
A top plate 50 is stretched on the upper surface of the cooler 22. As shown in FIG. 3, the top plate 50 has a length substantially equal to the depth dimension of the cooler 22 and a width slightly shorter than the thickness dimension of the cooler 22. As shown in FIG. 4, leg pieces 51 and 52 having different heights are bent at both edges in the width direction of the top plate 50. The top plate 50 has a shorter leg piece 51 on the edge of the upper surface of the cooler 22 on the outlet surface 22B side and a taller leg piece 52 on the upper surface of the cooler 22. It is placed at a position slightly inserted from the edge on the inlet surface 22A side, and is fixed by receiving and screwing both ends in the length direction with brackets 53 protruding from the upper ends of the front and rear end plates 26 described above. ing.
As described above, the top plate 50 is disposed so as to cover the upper surface of the cooler 22 in a downward slope toward the right side wall 10R in the cabinet. The inclination angle of the top plate 50 is preferably 7 degrees or more. As shown in FIG. 4, the upper end of the top plate 50 (the end portion on the storage chamber 16 side) has an in-compartment fan cover rather than the position of the front surface (the surface facing the in-compartment fan cover 40) in the upper fan case 32. Projecting toward the 40 side.
[0016]
Below the cooler 22, a drain pan 55 that is one size larger than the defrost water is disposed. A drain hose 56 is suspended from the drain pan 55 and led to a drain outlet to the outside.
A bottom plate 58 is stretched on the bottom surface of the cooler chamber 17. The bottom plate 58 is formed in a shallow dish shape as shown in FIG. 5, and the antifreeze heater 59 is formed in a zigzag shape on the surface of the bottom plate 58 and wired almost on the front surface. As shown in FIG. 6, the bottom plate 58 is stretched in a state of floating from the bottom wall 10 </ b> B in an inclined posture in which the end edge on the storage chamber 16 side is lowered. A plurality of drain holes 60 are formed at intervals on the edge of the bottom plate 58 on the storage chamber 16 side.
[0017]
Then, the effect | action of this embodiment is demonstrated. At the time of operation, the tray 20 storing the ingredients is placed on the left and right rails 19 and stored in the storage chamber 16. In this state, when the refrigeration device 29 and the both-compartment fans 30 are driven, the interior air in the storage chamber 16 passes through the suction port 38 of the cooler cover 37 as shown by the arrow in FIG. While being sucked toward the cooler 22, cold air is generated by heat exchange while passing through the cooler 22. The cool air is guided into the upper and lower fan cases 32 and then circulated from the outlet 41 of the internal fan cover 40 toward the storage chamber 16, thereby cooling the storage chamber 16. The food is frozen.
[0018]
On the other hand, a defrosting operation is performed as appropriate. At that time, the heaters 45 </ b> A and 45 </ b> B equipped on both sides of the cooler 22 generate heat when energized, and the frost and ice attached to the cooler 22 and the like are melted, and the defrost water is received by the drain pan 55. After that, it is discharged out of the warehouse through the drainage hose 56.
Here, after a specified capacity is secured by the sum of the heaters 45A and 45B on both sides, the capacity of the heater 45A on the inlet face 22A side is suppressed to be smaller than that of the heater 45B on the outlet face 22B side. While the defrosting from the cooler 22 is performed quickly, the temperature rise on the storage chamber 16 side is suppressed as much as possible.
Further, since the heater 45B on the larger capacity side is disposed at a relatively low position, the entire cooler 22 can be efficiently heated, and defrosting can be performed more efficiently.
[0019]
During the defrosting operation, the internal fan 30 and the like disposed above the cooler 22 and the ceiling surface of the cooler chamber 17 are also heated, so that the frost and ice adhering thereto melt, and FIG. As shown in FIG. 4, the liquid drops on the top plate 50 of the cooler 22 through the fan case 32 or the like. Here, since the top plate 50 is provided in a downwardly inclined posture toward the right side wall 10R, the moisture dropped on the top plate 50 flows down following the inclination and is transmitted along the outlet surface 22B of the cooler 22. It is dripped on the drain pan 55 and discharged through the drain hose 56 to the outside.
In addition, frost may become a lump and fall on the top plate 50 of the cooler 22. At that time, the mass of frost slides to the right end portion following the inclination of the top plate 50. Since the relatively large capacity heater 45B is arranged on the end portion side, the mass of frost is also swift. Then, it is melted and dripped toward the drain pan 55.
[0020]
Further, frost and ice adhering to the lower internal fan 30 and the storage wall are melted together, and flow down onto the bottom plate 58, and those that fall as a lump are melted by the antifreeze heater 59. . These defrost waters follow the inclination of the bottom plate 58 and flow down toward the edge on the storage chamber 16 side as shown by the arrow in FIG. 6, and the bottom of the main body 10 from the drain hole 60 opened there. Drop on the wall 10B. This drainage is discharged together with the drainage from the storage chamber 16 through the drainage opening provided in the bottom wall 10B. Even if the bottom wall 10B is wiped and cleaned, the bottom plate 58 is in a state of floating from the bottom wall 10B, and drainage from the bottom plate 58 falls to a position close to the storage chamber 16 side, so that it is easy to clean.
[0021]
As described above, according to the present embodiment, when the heaters 45A and 45B are provided on both the inlet surface 22A and the outlet surface 22B of the cooler 22, the specified capacity is secured by the sum of the heaters 45A and 45B on both sides. Since the capacity of the heater 45A on the inlet surface 22A side is set smaller than that of the heater 45B on the outlet surface 22B side, the defrosting from the cooler 22 is quickly performed in total, and the storage chamber 16 side The temperature rise can be suppressed as much as possible. Thus, adverse effects on the quality of the ingredients in the storage room 16 are prevented.
In addition, since the heater 45B on the larger capacity side is disposed at a relatively low position, the entire cooler 22 can be efficiently heated, and defrosting can be performed more efficiently.
[0022]
Moreover, the following advantages are acquired by having arrange | positioned the top plate 50 of the cooler 22 in the attitude | position of the downward slope toward the right side wall 10R side. First, even if water drops on the top plate 50 due to the defrosting operation or the like, it flows down to the drain pan 55 side along the inclination and does not remain on the top plate 50. In addition, when the frost falls as a lump on the top plate 50, it slides toward the lower right end, but a relatively large capacity heater 45B is disposed on the end side. The mass of frost is also quickly melted and dropped toward the drain pan 55.
Therefore, when the cooling operation is restarted next time, icing does not occur on the top plate 50, and as a result, ice blocks are prevented from growing. As a result, it is possible to prevent the ice block from blocking the cool air passage formed between the right side wall 10 </ b> R and interfering with the internal fan 30 arranged above the cooler 22.
[0023]
In the present embodiment, the side surface of the cooler chamber 17 that forms the boundary with the storage chamber 16 is composed of a cooler cover 37 that is divided and can be individually opened and closed, and an internal fan cover 40, and the cooler 22 A means for easily repairing the inside fan 30 and replacing parts is taken.
In this regard, since the top plate 50 of the cooler 22 is provided in a downward slope toward the right side wall 10R opposite to the covers 37 and 40 as described above, the water flowing down on the top plate 50 is covered by the cover 37. , 40, so that the cover 37, 40 and the like can be prevented from icing, and the opening and closing thereof can be ensured.
[0024]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) The cover constituting the side surface of the cooler chamber may be formed integrally instead of being divided, and such a cover is also included in the technical scope of the present invention.
(2) In the present invention, the storage chamber and the cooler chamber are provided side by side, and a heater for defrosting is provided on each of the storage chamber side surface and the opposite surface of the cooler. It can be widely applied to all of the specified formats.
[Brief description of the drawings]
1 is a cross-sectional view as viewed from the front according to an embodiment of the present invention. FIG. 2 is a cross-sectional view as viewed from the side. FIG. 3 is an exploded perspective view of a cooler. FIG. 5 is an exploded perspective view of the bottom plate. FIG. 6 is a partially enlarged sectional view showing the vicinity of the installation position of the bottom plate. FIG. 7 is a sectional view of a conventional example.
DESCRIPTION OF SYMBOLS 10 ... Freezer main body 10R ... Right side wall 16 ... Storage room 17 ... Cooler room 22 ... Cooler 22A ... Inlet surface 22B (of the cooler 22) Outlet surface 30 (of the cooler 22) ... Fan 45A ... (Small capacity) heater 45B ... (large capacity) heater 50 ... top plate 55 ... drain pan

Claims (3)

In the refrigerator main body, a storage chamber for storing foods and the like, and a cooler chamber equipped with a cooler for circulating and supplying cold air to the storage chamber are provided side by side in the cooler. In the refrigerator provided with a heater for defrosting on both the surface on the storage chamber side and the surface on the opposite side,
The capacity of the heater on the side of the storage chamber is set smaller than the capacity of the heater on the side of the opposite side , and the heater on the opposite side is lower than the heater on the side of the storage chamber in the cooler. A refrigerator characterized by being provided at a position . The refrigerator according to claim 1 , wherein a top plate is provided on the upper surface of the cooler so as to have a downward slope toward a wall surface opposite to the storage chamber . In the refrigerator main body, a storage chamber for storing foods and the like, and a cooler chamber equipped with a cooler for circulating and supplying cold air to the storage chamber are provided side by side in the cooler. In the refrigerator provided with a heater for defrosting on both the surface on the storage chamber side and the surface on the opposite side,
The capacity of the heater on the surface on the storage chamber side is set to be smaller than the capacity of the heater on the opposite surface, and the top plate is directed to the wall surface on the opposite side to the storage chamber on the upper surface of the cooler. Te you and being provided in a posture in which a downward slope cold却庫.

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