JPS6229910Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is directed to a refrigerator that cools the storage chamber by supplying cold air into the storage chamber.

(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 under the control of a damper thermostat. Conventionally, for foods such as raw meat and fresh fish that require cooling at a relatively low temperature of 0°C to -5°C, a dish-shaped container is provided in front of the damper thermostat, and the food is poured into the container from the upper opening of the container. The cold air that has passed through the damper thermostat is guided forward and upward to flow in a relatively large amount 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 possible to create a nearly 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. It is difficult to improve the flow of cold air in the cold air passage and cool the interior evenly, and this requires a complex duct structure.

(c) Purpose of the invention The purpose of the invention is to provide a refrigerator that has a simple structure and can cool the inside almost uniformly in a refrigerator that forms a nearly sealed space in the refrigerator compartment and indirectly cools the inside of the space. be.

(d) Structure of the device The present device cools the storage chamber of a refrigerator by supplying cold air, and also forms a substantially sealed cold room in the storage room, and forms cold air passages above and on the left and right outside of the cold room. A cold air inlet is formed approximately in the center of the rear of the upper cold air passage, and cold air outlets are formed at the lower ends of the left and right cold air passages, so that the upper wall of the cold room gradually becomes higher toward the front. It is composed of

(E) Embodiments Examples of the present application will be explained with reference to the drawings. FIG. 1 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, with a freezing chamber 6 that is cooled to freezing temperature at the top and a refrigerating chamber 7 that is maintained at a temperature above the freezing point at the bottom. 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.

In the upper part of the refrigeration chamber 7 in front of the damper case 19, directly below the partition wall 5, there is a bottom plate 23, and a low-temperature chamber case 2
4 and a mounting plate 25 housed in the case 24
The low-temperature chamber 26 is formed by being substantially sealed from the above components. A perspective view of the low-temperature chamber 26 is shown in Fig. 3. The bottom plate 23 is filled with a heat insulating material, and the low-temperature chamber case 24 is provided with a plurality of through holes 27 as cold air outlets. The low-temperature chamber case 24 is made up of an upper wall 28, left and right walls 29, 30, a back plate 31 having portions protruding outward from each wall, and closing plates 32, 33, 34 protruding outward from the above walls at the upper and both sides of the front surface, and is open forward and downward. Rails (not shown) bent inward are formed on the lower edges of the left and right walls 29, 30, and the mounting tray 25 is slidably supported on the rails and stored in the case 24. The tray 25 has a handle 36 at its front edge, left and right side walls 37 rising from both sides slightly further back than the handle 36, and a rear wall 39 rising from its rear edge. The left and right side walls 37 have inclined portions 40 at their front ends that are inclined so that they become higher toward the rear, and engagement claws 41 protruding to both sides at their rear ends. The engagement claws 41 are formed at the tips of elastic pieces that have elasticity in the left and right directions, and are shaped to be inclined inward toward the rear.
30 On the inside, there is a protrusion 42 that is inclined low toward the front.
When the mounting tray 25 is almost pulled out from the case 24, the engaging claws 41 come into contact with the protrusions 42 to prevent the tray 25 from falling due to being pulled out too far. The mounting work of the mounting tray 25 into the case 24 is accomplished by first inserting the mounting tray 25 along the rails of the case 24, and then pushing it further in after the engaging claws 41 come into contact with the protrusions 42, causing the mounting tray 25 to slide along the respective inclined surfaces and displacing the engaging claws 41 inward to overcome them, making the mounting very easy.

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 mounting tray 25 toward you as shown by the dotted line arrow in FIG. 43 rotates clockwise as indicated by the solid line arrow in FIG. 2, the front surface 45 moves upward, and at the same time as the loading tray 25 is pulled out, 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, when the mounting plate 25 is inserted into the case 24 again, the protrusion 48 will descend along the slope 40, so that the rotary lid 43 will be placed in the second position. The front opening of the case 24 is closed by rotating counterclockwise in the figure. Therefore, cold room 2
Items placed in the inner part of the storage compartment 6 can be delivered by pulling the loading tray 25 toward you to easily take out items placed at the back. Saves you the hassle of opening and closing. Upper wall 28 of case 24
A curved surface portion 28a that bulges upward is formed at the front portion so as not to support the front surface 45 of the rotary lid 43 when it moves upward. When the rotary lid 43 opens the front opening of the case 19, the front surface 45 is housed directly under the curved portion 28a as shown by the dashed line in FIG.

The back plate 31 of the case 24 is attached to the rear end of the bottom plate 23,
In addition, with the closing plates 33 and 34 connected to the front ends, the left and right ends of the bottom plate 23 are inserted into and engaged with concave grooves (not shown) extending back and forth formed on both side walls of the inner box 3 to be inserted into the refrigerator compartment 7. Attach. 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 comes into contact with the lower surface of the partition wall 5 and engages with the engaging portion (not shown), and the closing plates 33 and 34 come into contact with the inner surface of both side walls of the inner box 3 and connect the bottom plate 2 with other than the front opening of the case 24. The space above is divided into front and rear.
Furthermore, since the lower edges of the left and right walls 29 and 30 of the case 24 are spaced apart from the bottom plate 23, and the top wall 28 is also spaced apart from the partition wall 5, the top wall 28, the left and right walls 29 and 30 of the case 24, and the mounting The rear end is attached to the back plate 3 between the partition wall 5, the inner box 3 and the bottom plate 23 around the lower surface of the placing plate 25.
1, and the front end is closed by closing plates 32, 33, 34.
A closed cold air passage 50 is formed. An inlet 51 is formed in a portion of the damper case 19 at the approximate center of the back plate 31 located behind the upper wall 28 and corresponding to the front of the induction duct 22, so that the cold air discharged from the induction duct 22 can be cooled. The cold air flows into the cold air passage 50, flows forward through the upper wall 28, and then branches off to the left and right, travels through the left and right walls 29, 30, and a portion wraps around the lower surface of the mounting tray 25 and enters the refrigerator compartment 7 through the through hole 27.
flow down inside. By this flow of cold air, the cold room 2
Inside 6 is the upper wall 28, left and right walls 29, 30, and the mounting plate 2.
It is indirectly cooled from the bottom of 5. This prevents the items stored inside from drying out. Here, the cold air introduced into the cold air passage 50 is the one that has passed through the damper thermostat 15 continuously.
Even if the air is returned to the inside, the inside 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 provided protruding from the upper wall 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.

The upper wall 28 of the cold room case 24 as a whole is sloped so as to gradually become higher toward the front. Further, at the starting part of the bulging part 28a, that is, the end of the bulging part 28a on the inlet 51 side, there is a part extending over substantially the entire width of the upper wall 28 from side to side, and protruding upward so as to reach the lower surface of the partition wall 5. A projecting wall 60 is formed. Due to the existence of this projecting wall 60, the cold air flowing in from the inlet 51 and advancing collides with this projecting wall 60, is well distributed to the left and right, and flows down toward the left and right side walls 29 and 30. . Moreover, as a result of this, the cold air does not reach the bulging part 28a, so that the bulging part 28a is supercooled and icicles are formed on its inner surface, and the front surface 45 of the rotary lid 43 supports it, making it impossible to rotate. This will prevent things like this from happening. Furthermore, the induction duct 2
All the cold air discharged from the cold room 26 is discharged to the cold air passage 50 above the cold room 26, and the rear end of the cold air passage 50 is closed by the back plate 31, and the upper wall 28
Due to the slope, the cold air is stored between the partition wall 5 and the upper wall 28 for a while, and the resulting pressure increase causes the cold air to be divided from the back to the left and right.
Therefore, in conjunction with the presence of the projecting wall 60, the cold air flows down approximately evenly across the entire width of the left and right side walls 29, 30, and as a result, inside the cold room 26, the upper wall 28, the left and right side walls 29, 30, and It will be cooled almost evenly by the mounting plate 25. In particular, since cold air is stored in the cold air passage 50 above the cold room 26 and cooling from this part is performed well, natural convection of the cold air inside the cold room 26 is also improved.

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, an operating portion 58a extending downward from the bottom plate 23 is integrally formed on the knob 58 to improve operability.

Here, an opening 61 through which the manual damper 54 operates is formed in a portion of the projecting wall 60 located at the shaft 53.

(f) Effects of the invention According to the invention, the inside of the low-temperature chamber is indirectly cooled from the cold air passages above and on the left and right, thereby eliminating drying of the stored food and preventing deterioration of quality. In addition, the flow velocity of the cold air blown into the upper cold air passage decreases due to the slope of the upper wall of the cold room, and as a result, the cold air is not concentrated toward the front, and therefore only the front part of the cold room is supercooled. There is no In addition, this inclination increases the static pressure in the upper cold air passage, so some of the cold air coming out of the inlet is diverted from the back of the cold room to the left and right. It flows almost evenly across its entire width. As a result, the inside of the low-temperature room is cooled almost uniformly compared to the surroundings, and in particular, all the cold air from the inlet is discharged into the cold air passage above the cold room, and the rear end of the cold air passage is closed with a back plate, and the upper wall is closed. Because it is slanted, cold air is stored in the cold air passage above the cold room for a while, so cooling from above the cold room is performed well, and natural convection of cold air inside the cold room is also carried out smoothly. This prevents accidents such as some of the food inside freezing. Furthermore, the structure is simple and has great practical effects.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, and the first
The figure is a perspective view of the refrigerator, FIG. 2 is a sectional view of the cold room portion, and FIG. 3 is a perspective view of the cold room. 7...Refrigerating room, 26...Cold room, 27...Through hole, 28...Top wall, 50...Cold air passage, 51...
Introduction port.

Claims (1)

[Scope of utility model registration request] In a device that supplies cold air into a storage room to cool the room, a cold room formed in a substantially sealed manner inside the storage room, and cold air passages formed above and on the left and right outside of the cold room; a back plate that protrudes outward from the cold room and closes the rear end of the cold air passage; a cold air inlet formed in the back plate located approximately at the rear center of the upper cold air passage; and a cold air inlet at the lower end of the left and right cold air passages. The refrigerator has a cold air outlet formed therein, and the upper wall of the cold room is sloped so as to gradually become higher toward the front.