JPS6229912Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a refrigerator that cools a storage room by projecting cold air into the room.

(B) Prior Art Conventionally, in this type of refrigerator, a damper thermostat that senses the temperature inside the refrigerator compartment and automatically opens and closes the cold air outlet to the refrigerator compartment is usually installed at the upper part of the back wall of the refrigerator compartment. The inside of the refrigerator compartment is normally kept cool at about +3°C to +5°C by controlling the damper thermostat. Here, raw meat, fresh fish, etc. are stored at 0℃ to -5℃.
Conventionally, for foods that require cooling at a relatively low temperature, such as foods, a dish-shaped container is provided in front of the damper thermostat, and cold air that has passed through the damper thermostat is guided forward and upward into the container from the upper opening of the container. A large amount of water flows into the container to form a low-temperature space, and the food is stored in this container.

However, with such a configuration, there is a risk that the food will dry out and deteriorate in quality because it is directly exposed to a large amount of cold air. Therefore, in order to prevent such drying, it is conceivable to create a substantially sealed space inside the refrigerator compartment, form a cold air passage outside of this space, and supply cold air to this cold air passage to indirectly cool the inside. In order to use a cold room for multiple purposes, it is necessary to install a damper device that adjusts the amount of cold air supplied to the cold air passage, and to open and close the cold air inlet to the cold air passage to vary the temperature inside the cold room. . In order to reliably control the temperature inside the low-temperature room, cold air leakage when the inlet is blocked is a problem, and in order to reduce this cold air leakage, a relatively troublesome sealing structure is required between the inlet and the damper device. It had become necessary.

(c) Purpose of the invention This invention creates a nearly sealed space inside the storage room, creates a cold air passage outside this space, and reduces the amount of cold air supplied to the cold air passage in a system where indirect cooling is performed from this cold air passage. To provide a refrigerator with an improved damper device for adjustment.

(d) Structure of the invention This invention constructs a nearly sealed cold room directly under the partition wall in the refrigerator compartment of a refrigerator, in which the freezer compartment and the refrigerator compartment are divided into upper and lower parts by a partition wall, and the partition wall and the upper wall of the cold room are connected to each other. A cold air passage is formed on the outside of the cold room including a gap between the two, and a cold air inlet that opens forward is formed at the rear of the gap. A damper device is provided with a damper plate that can be freely moved and an operating section facing the front of the cold room at the other end.

(E) Embodiments Examples of the present invention will be explained with reference to the drawings. 1st
The figure shows a schematic perspective view of this type of refrigerator 1. The refrigerator 1 is constructed by filling a heat insulating material 4, which will be described later, between an outer box 2 made of a steel plate and an inner box 3 made of a synthetic resin. The interior of the refrigerator 1 is divided into upper and lower sections by a partition wall 5,
A freezing compartment 6 that is cooled to freezing temperature is formed in the upper part, and a refrigerating compartment 7 that is maintained at the freezing point or higher is formed in the lower part.
A substantially sealed vegetable compartment 8 is formed at the bottom of the refrigerator compartment 7, and 9, 10, and 11 are connected to the respective compartments 6,
These are doors that close the openings of the refrigerator 1 corresponding to numbers 7 and 8.

FIG. 2 shows an enlarged sectional view of the upper part of the refrigerator compartment 7. Air cooled by a cooler (also not shown) included in a refrigeration cycle installed in a cooling chamber (not shown) formed inside the heat insulating material 12 filled in the partition wall 5 or on the back of the freezer compartment 6 is supplied to a blower (not shown). The refrigerator compartment 7 is accelerated by
The liquid is introduced through a discharge port 14 formed in the back wall of the inner box 3 near the partition wall 5 at the top of the box. A damper thermostat 15 is housed in a recess 16 formed slightly below the discharge port 14. The damper thermostat 15 has a temperature sensing part 17 that senses the temperature inside the refrigerator compartment 7, and a buff-full plate 18 that opens and closes the discharge port 14 by tilting diagonally upward when opened. Discharge port 1 at upper limit temperature
4 is opened and the discharge port 14 is closed at the lower limit temperature to automatically adjust the temperature inside the refrigerator compartment 7 to a substantially constant temperature. 19
is a damper case, which is attached to the upper back wall of the refrigerator compartment 7 so as to cover the damper thermostat 15. The damper case 19 is a plastic case with a built-in molded heat insulating material, and has a window hole 2 inside that communicates with the duct 13 to communicate a space 20 through which the full board 18 moves and the space 20 with the refrigerator compartment 7 on both sides.
1 and a guide duct 22 that directly guides a part of the cold air discharged from the discharge port 14, colliding with the baffle plate 18, and heading diagonally upward and forward.

At the upper part of the refrigerator compartment 7 in front of the damper case 19, and directly below the partition wall 5, there is a bottom plate 23 and a cold room case 2.
4 and a mounting plate 25 housed in the case 24
A cold room 26 is formed in a substantially sealed manner. Each is shown in FIGS. 2 to 4. The inside of the bottom plate 23 is filled with a heat insulating material, and a plurality of through holes 27 are bored therein. Fitting holes 66 are formed at the four corners of the top surface, and fitting claws 67 that protrude to both sides are formed at the front. The case 24 includes an upper wall 28, left and right walls 29, 30, a back plate 31 having a portion protruding outward from each wall, and a closing plate 32 protruding outward from each wall at the upper front and both sides.
It consists of 33 and 34 and is open to the front and downward. A locking arm 64 that projects upward is formed on the closing plate 32, and four legs 65 that project downward are formed on the lower edges of the left and right walls 29, 30, and four legs 65 that project downward are formed on the lower edges. A bent rail 35 is formed, and the mounting plate 25 is slidably supported on the rail 35 and housed in the case 24. Placement plate 2
5 has a handle part 36 on the front edge, left and right side walls 37, 38 rising from the handle part 36 on both sides from a slightly deeper part, and a rear wall 39 rising on the rear side, and the left and right side walls 3
7, 38 have an inclined portion 40 that slopes upwardly toward the rear, and an engaging pawl 4 that protrudes to both sides at the rear end.
1 is formed. The engaging pawl 41 is formed at the tip of an elastic piece so as to have elasticity in the left-right direction, and has a shape that is inclined inward toward the rear. case 24
A protrusion 42 that slopes low toward the front is formed on the inside of the left and right surfaces 29, 30 of the case 24, and when the mounting plate 25 is substantially pulled out from the case 24, the engaging claw 41 comes into contact with the protrusion 42, preventing it from being pulled out too much. prevent falling due to To attach the mounting plate 25 into the case 24, first insert the mounting plate 25 along the rail 35, and after the engaging claw 41 comes into contact with the protrusion 42, push it further. Attachment is very easy because it is achieved by sliding on the inclined surface and moving the engaging claw 41 inward to overcome it.

The lower opening of the case 24 is closed by housing the mounting tray 25, but the front opening is closed by the rotary lid 43.
occluded by The rotary lid 43 is made of transparent resin and consists of substantially fan-shaped left and right side surfaces 44 and a front surface 45 that has a substantially arc-shaped cross section. A protrusion 46 protruding outward is formed at the center of the fan on the left and right side surfaces 44, and this protrusion 4
6 on the case 24 left and right walls 29, 30 in front of the protrusion 42
It is rotatably engaged with a hole 47 formed in. At this time, the front surface 45 is located at the front opening of the case 24 and closes the opening, and the left and right side surfaces 44 have protrusions 48 that protrude inward and are located in front of the inclined portion 40 of the mounting tray 25. It is formed. Therefore, by pulling out the placing tray 25 toward you, the inclined portion 40 comes into contact with the protrusion 48, and as the protrusion 48 further rises along the inclined portion 40, the rotary lid 43 rotates clockwise in FIG. The front surface 45 moves upward and the loading tray 25 is pulled out, at the same time the front opening of the case 24 is opened, allowing for easy delivery of articles. Here, since the center of gravity of the rotary lid 43 is always located in front of the protrusion 46, the placing tray 25 is moved back to the case 2.
4, the protrusion 48 descends along the slope 40, and the rotary lid 43 rotates counterclockwise in FIG. 2 to close the front opening of the case 24. Therefore, when delivering items into the cold room 26, items placed deep inside can be easily taken out by pulling the placement tray 25 toward you, and the rotating lid 43 is linked to the placement tray 25. It saves you the trouble of opening and closing. At the front of the upper wall 28 of the case 24, there is a curved surface portion 2 that bulges upward so as not to support the front surface 45 of the rotary lid 43 when it moves upward.
8a is formed. When the rotary lid 43 is opened, the front surface 45 is stored under the curved surface portion 28a and does not interfere with the delivery of food.

The legs 65 of the case 24 are inserted and fitted into the fitting holes 66 of the bottom plate 23 from above to connect them, and the left and right ends of the bottom plate 23 are formed on both side walls of the inner box 3 to form concave shapes (not shown) extending back and forth. The fitting claws 67 are inserted into and engaged with the grooves of the inner box 3, and the fitting claws 67 are fitted into fitting portions on both side walls of the inner box 3, which are also not shown.
and install it in the refrigerator compartment 7. At this time, the back plate 31 of the case 24 is located immediately in front of the damper case 19 and abuts against the lower surface of the partition wall 5 and the inner surface of both side walls of the inner box 3 so as to partition the space above the bottom plate 23 into front and rear parts. Further, the closing plate 32 is in contact with the lower surface of the partition wall 5, and the locking arm 64 is fixed to a locking portion (not shown) on the lower surface of the partition wall 5, and the closing plates 33 and 34 are in contact with the inner surface of both side walls of the inner box 3, and the locking arm 64 is fixed to the locking part on the lower surface of the partition wall 5 (not shown). The space above the bottom plate 23 is partitioned into front and rear sections by means other than the front opening. Further, the lower edges of the left and right walls 29 and 30 of the case 24 are spaced apart from the bottom plate 23 by the legs 65, and the top wall 28 is also spaced apart from the partition wall 5, so the top wall 28 of the case 24,
A cold air passage 50 is provided between the left and right walls 29, 30 and the lower surface of the mounting tray 25 between the partition wall 5, the inner box 3, and the bottom plate 23.
is formed. Rear plate 3 located behind the upper wall 28
Induction duct 2 of the damper case 19 approximately in the center of 1
An inlet 51 is formed in a portion corresponding to the front of the guide duct 22, whereby the cold air discharged from the induction duct 22 flows into the cold air passage 50, flows forward through the upper wall 28, and then is divided into left and right sides. Sink, left and right walls 29, 30
A part of it goes around the bottom surface of the mounting plate 25 and forms the through hole 2.
7 into the refrigerator compartment 7. Due to this flow of cold air, the inside of the low temperature room 26 includes an upper wall 28, left and right walls 29,
30 and the bottom surface of the mounting plate 25 are indirectly cooled. This prevents the items stored inside from drying out. Since the cold air introduced into the cold air passage 50 has passed through the damper thermostat 15, even if it is returned to the refrigerator compartment 7, the interior of the refrigerator compartment 7 will not be overcooled. Further, the cold air in the refrigerator compartment 7 is returned to the cooling compartment (not shown) through the suction port 52.

A shaft 53 is protruded from the upper surface 28 of the case 24, and a manual damper 54 is pivotally supported on the shaft 53 so as to be horizontally rotatable within the cold air passage 50. The manual damper 54 is pivoted approximately at the center, and has a damper plate 55 at one end that is located in front of the inlet 51 and can be opened and closed, and an operating part 56 that penetrates the closing plate 32 and faces forward at the other end. ing. By arbitrarily operating this manual damper 54, the amount of cold air flowing into the cold air passage 50 can be changed as appropriate.
In other words, raw meat, fresh fish, etc. are kept at relatively low temperatures (e.g. -5°C).
When storing articles that need to be stored at a low temperature, the introduction port 51 may be opened using the damper plate 55. Further, in the case of articles other than those mentioned above, for example, articles to be stored at about 0° C., the inside of the low temperature chamber 26 can be cooled to an appropriate temperature by partially opening or closing the inlet 51. In addition, since there is a heat insulating material inside the bottom plate 23, the temperature inside the cold room 26 is 7 degrees (for example, +3
It is not easily affected by temperature (about ℃), and independent temperature control is possible.

A protruding wall 60 is formed at the rear end of the curved surface portion 28a of the upper wall 28 of the case 24, and extends upwardly and laterally so as to reach the lower surface of the partition wall 5, and the upper wall 28 itself extends forward as a whole. It is sloped upwards. Therefore, the cold air discharged forward from the inlet 51 is not concentrated in the front part of the cold room 26, but is distributed to the left and right, so that only the front part is not overcooled. Further, since cold air does not reach the curved surface portion 28a, icicles and the like are not generated on the lower surface of the curved surface portion 28a, and accidents such as the rotary lid 43 being supported are thereby prevented and smooth operation is possible. Furthermore, immediately after exiting the inlet 51, the cold air is divided to the left and right, so that it flows down the left and right walls 29, 30 almost uniformly, and the interior is evenly cooled.

A manual damper 5 is installed near the shaft 53 of the projecting wall 60.
4 is formed, and the portion of the manual damper 54 closer to the damper plate 55 than the shaft 53 is always pushed upward by this opening 63. An abutting plate 61 is integrally formed on the upper edge of the inlet 51 and extends forward with a space therebetween from the upper wall 28, and the damper plate 55 is positioned to engage with the abutting plate 61 below. The upper surface of the damper plate 55 is always slidably pressed against the lower surface of the damper plate 55. Here, the damper plate 55 has an arc shape substantially similar to the rotating circle, and the introduction port 51 also has substantially the same shape. Also, the introduction port 5
A protruding wall 62 is formed on the lower edge of the damper plate 1, located immediately behind the damper plate 55, and protruding upward. As a result, the upper part of the damper plate 55 is sealed by pressure contact with the contact plate 61, and the lower part is sealed by the protruding wall 62, so that cold air leakage is prevented and the inlet 51 is sealed.
The amount of cold air coming in will be reliably controlled.

A part of the cold air discharged from the discharge port 14 of the duct 13 flows out from the left and right window holes 21, flows down the space behind the back plate 31 of the case 24, circulates within the refrigerator compartment 7, and cools the interior of the refrigerator compartment. An adjustment shaft 57 extends forward from the damper thermostat 15 through the damper case 19, and a knob 58 is attached to the tip of the shaft 57 located on the outer surface of the damper case 19. Here the bottom plate 23
Alternatively, the back plate 31 is configured to hide the knob 58 from the front, that is, just in front of the damper case 19, and the set temperature of the damper thermostat 15 cannot be adjusted in this state. Therefore, the knob 58 is integrally formed with an operating portion 58a extending downward from the bottom plate 23 to improve operability.

(f) Effect of the invention According to the invention, a damper device that opens and closes the cold air inlet to the cold air passage outside the almost sealed cold room is installed within the space between the partition wall that is a part of the cold air passage and the upper wall of the cold room. Since the damper device is installed in the damper, the space can be used effectively without reducing the volume of the cold room or refrigerator room. In addition, since the operation section of the damper device faces the front of the cold room, it is easy to change the amount of cold air introduced into the cold air passage, and the temperature of the cold room can be easily adjusted.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present application. Figure 1 is a perspective view of a refrigerator, Figure 2 is a sectional view of a cold room, Figure 3 is a perspective view of the same, and Figure 4 is an exploded perspective view of components of a cold room. It is a diagram. 7... Refrigerator room, 26... Low temperature room, 28... Upper wall, 51... Inlet, 54... Manual damper, 55
... Damper plate, 61 ... Contact plate, 62 ... Projection wall.

Claims (1)

[Scope of utility model registration request] In a refrigerator in which the interior of the refrigerator is divided into upper and lower parts by a partition wall to form a freezer compartment and a refrigerator compartment, and the refrigerator compartment is cooled by discharging cold air, a substantially hermetically sealed compartment is provided directly under the partition wall in the refrigerator compartment. a cold air passage formed on the outside of the cold room including a space between the partition wall and the top wall of the cold room; a cold air inlet opening forward and formed at the rear of the space; A damper device is provided, and has a damper plate located in front of the cold air inlet at one end and movable so as to freely open and close the inlet, and a damper device having an operation part facing the front of the cold room at the other end. A refrigerator made of