JP2000121230A - Freezer and refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a region of an opening or closing door and attain a uniform temperature and a constant temperature within a refrigerating chamber. SOLUTION: A refrigerating chamber 5 constituted by a thermal insulating box 3 is provided with an opening or closing door 15 having a storing section 43 such as a door pocket and the like and with an exclusive evaporator 17 as well as a cooling fan 21. An inner wall surface of the refrigerating chamber 5 is changed into a plurality of cooling wall surfaces 27a by the evaporator 17 and in turn there is provided an opening or closing door cooling duct 33 where cooling air flows between the inner wall surface of the opening or closing door 15 and a rear wall surface of the storing section 43 so as to cool a region at the opening or closing door 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a refrigerator-freezer.

[0002]

2. Description of the Related Art In general, in refrigerators and refrigerators, cooling means for cooling the inside of a refrigerator is either a direct cooling type in which the inside of the refrigerator is cooled by cooling walls whose walls are cooled by an evaporator, or a cooling fan which cools the cool air cooled by the evaporator. There is a cooling system during cooling by supplying into the refrigerator.

[0003]

In the case of a cooling system in which cold air cooled by an evaporator is supplied into a refrigerator for cooling, the cold air directly touches the food, so that the food is dried. In particular, when the food is rapidly cooled, a large amount of cold air comes into contact with the food, which results in hastening the drying of the food, which is not preferable in food preservation.

On the other hand, in a direct cooling type in which the inside of a refrigerator is cooled by a cooling wall cooled by an evaporator, since the cold air does not directly come into contact with the food as in an intercooling type, drying of the food is accelerated. Nevertheless, if the temperature in the refrigerator suddenly rises when the food is charged, it is not possible to take immediate measures for cooling. For this reason, as disclosed in Japanese Patent Application No. 10-192028, a refrigerator that circulates cool air by appropriately operating a cooling fan arranged in a refrigerator in response to fluctuations in the refrigerator temperature has been proposed.

However, according to this proposal, it is difficult to obtain a reliable flow of the cool air in the opening / closing door side region, and the temperature uniformity and the constant temperature inside the refrigerator are not always sufficient.

[0006] Therefore, an object of the present invention is to provide a refrigerator-freezer which does not hasten drying of food, and which can maintain the temperature in the refrigerator and the temperature in the refrigerator.

[0007]

In order to achieve the above object, a first aspect of the present invention is to provide a refrigerating room comprising a heat insulating box, a door provided with a storage portion such as a door pocket, and a dedicated door. And a cooling fan, wherein the evaporator uses the inner wall surface of the refrigerator compartment as a plurality of cooling wall surfaces, and cool air flows between the inner wall surface of the door and the back wall surface of the storage section. An open / close door cooling duct through which air flows.

[0008] Thus, since the cold air does not directly touch the food, the drying of the food is not accelerated. On the other hand, the cool air flows in the opening / closing door cooling duct by the operation of the cooling fan, so that the opening / closing door side can be cooled, and the inside of the refrigerator can be kept at a uniform temperature and a constant temperature.

According to a second aspect of the present invention, there is provided a refrigerator having a cooling wall on a cooling wall through which cool air cooled by the cooling wall flows. The cooling duct communicates and forms a cool air circulation cooling passage through which cool air circulates.

[0010] Thereby, the cool air from the cooling duct in the refrigerator flows to the opening / closing door cooling duct reliably, and the opening / closing door side area can be efficiently cooled.

According to a third aspect of the present invention, there is provided a transfer passage for connecting a cooling duct in a refrigerator and a door cooling duct to prevent heat transfer from a heat source for preventing dew condensation provided on the periphery of an opening of a refrigerator compartment. A heat blocking means is provided.

[0012] Thus, the cool air from the cooling duct in the refrigerator can avoid the influence of the heat from the dew condensation preventing heat source, and can efficiently cool the door.

According to a fourth aspect of the present invention, when the opening / closing door is opened, an air curtain that covers the access port of the refrigerator compartment is formed by the cooling duct in the refrigerator.

Thus, when the opening / closing door is opened, the cool air from the internal cooling duct that sends cool air to the opening / closing door cooling duct becomes an air curtain covering the inlet / outlet, thereby preventing a rapid rise in the temperature of the refrigerator compartment.

According to a fifth aspect of the present invention, the door cooling duct is communicated with a cool air inlet provided in a storage portion of the door.

[0016] This makes it possible to uniformly and efficiently cool the storage portion on the side of the opening and closing door, which has been difficult to cool conventionally.

According to a sixth aspect of the present invention, a cool air passage communicating with the opening / closing door cooling duct is provided at the bottom of the storage section of the opening / closing door.

This makes it possible to uniformly cool the bottom of the storage section, which is difficult to cool, so that cooling can be performed efficiently.

According to a seventh aspect of the present invention, the cold air passage provided at the bottom of the storage section is communicated with the inside of the refrigerator compartment through the cold air passage opening.

Thus, a part of the cool air is supplied into the refrigerator, so that the storage part and the refrigerator can be uniformly cooled.

Further, according to the present invention, the cool air circulation cooling passage is made to flow from the opening / closing door cooling duct to the floor cooling duct provided on the floor inside the refrigerator compartment.

Thus, the opening and closing door side and the floor side of the refrigerator compartment can be efficiently cooled.

According to a ninth aspect of the present invention, the cool air flowing through the opening / closing door cooling duct is caused to flow into the refrigerator compartment while avoiding thermal contact with the dew condensation preventing heat source provided at the periphery of the opening of the refrigerator compartment. .

[0024] Thus, the cool air sent into the refrigerator can be prevented from being thermally affected, so that efficient cooling can be performed.

According to a tenth aspect of the present invention, an evaporator and a cooling fan are provided respectively in a refrigerator compartment and a freezer compartment partitioned by a heat insulating partition wall, while the partition wall is provided on the heat insulating partition wall on the refrigerator compartment side. A cooling duct is provided, and when the door is closed, a cool air circulation cooling passage is formed in which the cool air flows from the door cooling duct to the inside of the partition wall cooling duct.

Thus, the refrigerating compartment and the freezing compartment can cool the inside temperature of the refrigerator independently, and the refrigerating compartment can cool the area on the side of the opening / closing door, so that the inside of the refrigerator can be kept at a uniform temperature.
Constant temperature can be achieved.

According to an eleventh aspect of the present invention, there is provided a heat transfer for preventing heat transfer from a heat source for preventing dew condensation provided on a peripheral edge of an opening of a refrigerating compartment in a communication passage connecting a cooling duct for a door and a cooling duct for a partition wall. And a blocking means.

Thus, contact of heat from the dew condensation preventing heat source can be avoided, and the refrigerator compartment can be efficiently cooled.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 shows a refrigerator 1. The interior of the refrigerator-freezer 1 constituted by the heat-insulating box 3 includes a refrigerator compartment 5, a vegetable compartment 7, and a freezer compartment 9 from above, and the refrigerator compartment 5 and the vegetable compartment 7 are arranged in a vegetable compartment by a refrigerator partition plate 11. 7 and freezer 9
Are partitioned by a heat insulating partition wall 13.

The front of the refrigerator compartment 5, the vegetable compartment 7, and the freezer compartment 9
The opening / closing door 15 is provided, and by opening the opening / closing door 15, it is possible to take in and out foods and the like.

The refrigerating compartment 5 and the freezing compartment 9 have dedicated evaporators 17, 19 and cooling fans 21, 23, respectively. The evaporator 17 of the refrigerator compartment 5 is provided with a refrigerant pipe 25 through which the refrigerant flows.
Are arranged on the ceiling side, the back side, and the heat insulation partition 13 side in the heat insulation box 3 in contact with the wall surface 27 of the inner box forming the refrigerator compartment 5. Have a plurality of cooling wall surfaces 27a and 29a.

The cooling fan 21 is provided on the ceiling side of the refrigerator compartment 5.
Is provided on the side of the opening / closing door 15, and an opening / closing door cooling duct 33 is provided on the side of the opening / closing door 15. The inside cooling duct 31 and the opening / closing door cooling duct 33 are connected by the communication passage 35 when the opening / closing door 15 is closed. Communication is possible.

The cooling duct 31 in the refrigerator is made of a material having good heat conductivity and is arranged over the entire surface of the ceiling. Cooling air flows when the cooling fan 21 rotates.

As shown in FIG. 2, the communication passage 35 is formed integrally and continuously with the internal cooling duct 31, and is provided with a heater or the like provided on an opening peripheral edge 37 serving as an access port 38 to prevent dew condensation. The heat source 39 is made of a heat insulating member 41 so that thermal contact can be avoided. The open end 35a of the free end side of the communication passage 35 is opened when the door 15 is closed.
5 and the opening / closing door cooling duct 33
And can be connected. When the door 15 is opened, as shown in FIG. 3, the connection with the door cooling duct 33 is released, and the outlet becomes an outlet for blowing the cool air from the cooling duct 31 in the compartment downward. An air curtain covering the mouth 38 is made.

The opening / closing door cooling duct 33 is formed by an inner wall surface of the opening / closing door 15 and a back wall surface of a storage portion 43 such as a door pocket provided inside the opening / closing door 15. Connectable. Further, the lower end side has a shape opened to the inside of the storage.

The evaporator 19 of the freezing room 9 is arranged behind the freezing room 9, and the cool air exchanged by the evaporator 19 circulates in the freezing room 9 independently by the rotation of the cooling fan 23. It has a structure.

FIG. 4 shows a circuit diagram of a refrigeration cycle having an evaporator 17 for the refrigerating compartment 5 and an evaporator 19 for the freezing compartment 9. The three-way valve 45 is switched and controlled, for example, by a solid line. As shown by the arrows, the refrigerant discharged from the compressor 47 passes through the condenser 49, the freezing capillary tube 51, and the evaporator 19, and forms a refrigeration cycle returning to the compressor 47 again.

Alternatively, as shown by the dotted arrow, the compressor 4
The refrigerant discharged from the refrigerated capillary tube 5
3. A refrigeration cycle that passes through the evaporator 17 and returns to the compressor 47 is configured.

In the refrigerator 1 thus configured, the cold air exchanged in the evaporator 19 of the freezing room 9 is sent into the freezing room 9 by the rotation of the cooling fan 23 to cool the inside of the refrigerator. By repeating the circulation through the evaporator 19, the independent freezing room 9 is cooled.

On the other hand, the evaporator 17 of the refrigerator compartment 5 is
Since the refrigerant 5 is in direct contact with the wall surface 27, when the refrigerant decompressed by the refrigeration capillary tube 53 flows into the refrigerant tube 25, the refrigerant takes heat from the wall surface 27 and evaporates. The vaporization heat at this time causes the wall surface 27 of the inner box to cool the cooling wall surfaces 27a,
9a, and the inside of the refrigerator is cooled. At the same time, due to the rotation of the cooling fan 21, the cool air passes through the cooling inside the refrigerator 31, the communication path 35, and the inside of the door cooling duct 33, and repeats the circulation flowing to the floor surface side in the refrigerator.

As a result, it is possible to prevent the cold air from directly touching the food, and it is not necessary to accelerate the drying of the food. In addition, the area on the side of the door 15 can be cooled,
The uniform cooling can be performed over the entire circumference of the refrigerator compartment 5.

In this operation, when the cool air passes through the communication passage 35, the heat source 3
Since the heat transfer from the heat exchanger 9 is avoided, the temperature of the cool air does not rise, and efficient circulation cooling is possible.

Next, when the door 15 is opened, the connection between the door cooling duct 33 and the communication passage 35 is released.
By blowing the cool air from the internal cooling duct 31 downward from the free end side opening 35a from the communication passage 35, an air curtain covering the entrance 38 is made. As a result, the cool air does not quickly escape to the outside, and the temperature rise in the refrigerator can be suppressed to a small value.

FIG. 5 shows a second embodiment in which cool air flows into the storage section 43 of the door 15.

That is, a structure is provided in which a cool air inlet 55 communicating with the inside of the opening / closing door cooling duct 33 is provided on the back wall surface of each storage section 43.

The other components are the same as those in the first embodiment, and therefore, are denoted by the same reference numerals and detailed description is omitted.

Therefore, according to the second embodiment, the cool air passes through the cooling duct 31, the communication passage 35, and the opening / closing door cooling duct 33, and is blown out to the floor in the refrigerator compartment 5 and then cooled again. The inside of the refrigerator is cooled by repeating the circulation returning to the inner cooling duct 31. At this time, the door cooling duct 3
The cool air passing through 3 flows from the cool air inlet 55 into the storage section 43, whereby the inside of the storage section 43 in which conventional cooling is difficult to be performed can be uniformly cooled.

FIG. 6 shows a third embodiment in which cool air flows to the bottom of the storage section 43 of the door 15.

That is, a cool air passage 57 communicating with the inside of the door cooling duct 33 is provided at the bottom of each storage section 43.

Since the other components are the same as those of the first embodiment, the same reference numerals are given and the detailed explanation is omitted.

Therefore, according to the third embodiment, the cool air is blown out to the floor in the refrigerator compartment 5 through the cooling duct 31, the communication passage 35, and the opening / closing door cooling duct 33, and then cooled again. The inside of the refrigerator is cooled by repeating the circulation returning to the inner cooling duct 31. At this time, the door cooling duct 3
Since the cool air passing through 3 flows through the cool air passage 57, the bottom of the storage portion 43, which is conventionally difficult to be cooled, can be uniformly and efficiently cooled.

FIG. 7 shows a fourth embodiment in which cool air from the opening / closing door cooling duct 33 passes through the storage section 43 and flows into the storage.

That is, a cool air passage 57 communicating with the inside of the opening / closing door cooling duct is provided at the bottom of each storage section 43, and the cool air passage 57 has a structure communicating with the inside of the refrigerator through the cool air passage opening 59. Things.

Since the other components are the same as those of the first embodiment, the same reference numerals are given and the detailed description is omitted.

Therefore, according to the fourth embodiment, the cool air is blown out to the floor in the refrigerator compartment 5 through the cooling duct 31, the communication passage 35, and the opening / closing door cooling duct 33, and then cooled again. The inside of the refrigerator is cooled by repeating the circulation returning to the inner cooling duct 31. At this time, the door cooling duct 3
When the cool air passing through the cool air passage 3 flows through the cool air passage 57, the bottom of the storage portion 43, which is conventionally difficult to cool, is uniformly and efficiently cooled, while the cool air blown out from the cool air passage 59 into the cooler causes the constant temperature inside the cooler. Temperature and soaking.

FIG. 8 shows a fifth embodiment in which cool air flows along the floor of the refrigerator compartment 5.

That is, a floor cooling duct 61 is provided on the refrigeration partitioning plate 11 for separating the refrigerator 5 from the vegetable compartment, and one of the floor cooling ducts 61 communicates with the door cooling duct 33 when the door 15 is closed. It is possible. The other is open so as to blow out toward the rear-side cooling wall surface 27a in the refrigerator.

Since the other components are the same as those of the first embodiment, the same reference numerals are given and the detailed description is omitted.

Therefore, according to the fifth embodiment, the cool air flows through the cooling duct 31, the communication passage 35, the opening / closing door cooling duct 33, and the floor cool air duct 61, and is blown out into the refrigerator. The interior of the refrigerator is cooled by repeating the circulation returning to the interior cooling duct 31 again.

At this time, the temperature of the vegetable compartment 7 is reduced by the cooling wall surface 29a of the lower heat insulating partition wall 13 while cooling the door 15 side and the floor surface side of the refrigerator so as to equalize the temperature inside the refrigerator. In addition to being cooled well, the direct cooling type cooling does not accelerate the drying of vegetables.

FIG. 9 shows a sixth embodiment in which the influence of the heat of the dew condensation preventing heat source 63 can be avoided when the cool air flowing through the opening / closing door cooling duct 33 is blown into the refrigerator. is there.

That is, a dew condensation preventing heat source 63 such as a heater provided on a refrigeration partition plate 11 for separating the refrigeration compartment 5 from the vegetable compartment 7.
And a heat insulating member 65 is provided so as to cover.

Since the other components are the same as those of the first embodiment, the same reference numerals are used and the detailed description is omitted.

Therefore, according to the sixth embodiment, the area on the side of the door 15 can be cooled, and at the same time, when the cool air passes through the door cooling duct 33 and is drawn into the storage,
Since the influence of the heat from the dew condensation preventing heat source 63 can be avoided by the heat insulating member 65, the temperature rise of the cool air is suppressed, and the inside of the refrigerator can be efficiently cooled.

FIG. 10 shows a seventh embodiment in which cold air heat exchanged by the heat insulating partition 13 flows through the vegetable compartment 7 and the refrigerator compartment 5.

That is, the partition wall cooling duct 67 is provided on the vegetable room 7 side, which is the upper surface of the heat insulating partition wall 13 that separates the vegetable room 7 and the freezing room 9 into independent rooms, while the heat insulating partition wall 13 and the refrigerated partition plate 11 are provided. Heat source 6 for preventing condensation such as a heater disposed in
9 is covered with a heat insulating member 71 so that the cool air from the opening / closing door cooling duct 33 can avoid the influence of the heat from the dew condensation preventing heat source 69.

Since the other components are the same as those of the first embodiment, the same reference numerals are used and the detailed description is omitted.

Therefore, according to the seventh embodiment, the heat insulating partition wall 13 divides the refrigerator compartment temperature zone including the vegetable compartment 7 and the freezer compartment temperature zone.

On the other hand, the cool air from the cooling duct 31 in the refrigerator is
When passing through the opening / closing door cooling duct 33, the cooling of the opening / closing door 15 side is performed, and then the cooling water flows through the partition wall cooling duct 67.

At this time, since the heat insulating partition wall 13 is cooled to about -10 ° C. by heat conduction from the freezing compartment 9, cold air flowing through the partition wall cooling duct 67 is subjected to heat exchange by the heat insulating partition wall 13. It is cooled and sent out into the vegetable compartment 7. As a result, efficient direct cooling of the vegetable compartment 7 can be achieved, and there is no direct contact with cool air, so that drying of the vegetables is not accelerated.

[0072]

As described above, according to the refrigerator of the present invention, the cool air flowing through the opening / closing door cooling duct is
The opening / closing door-side area can be cooled, and the temperature in the refrigerator compartment can be kept uniform and constant.

Further, it is possible to efficiently cool the storage portion of the opening / closing door which has been considered to be hard to be cooled.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a refrigerator-freezer according to the present invention.

FIG. 2 is an explanatory view showing a communication path connecting a cooling duct in a refrigerator and an opening / closing door cooling duct in a refrigerator compartment when fully closed.

FIG. 3 is an explanatory diagram showing a communication path in a state where an opening / closing door is opened.

FIG. 4 is an overall refrigeration cycle diagram.

FIG. 5 is an explanatory diagram of a refrigerating room in which a storage unit and an opening / closing door cooling duct communicate with each other.

FIG. 6 is an explanatory diagram of a refrigerating room in which the bottom of the storage unit communicates with an opening / closing door cooling duct.

FIG. 7 is an explanatory view of a refrigerating room in which an opening / closing door cooling duct is communicated with the inside of the refrigerating room through the bottom of the storage unit.

FIG. 8 is an explanatory diagram of a refrigerating room in which an opening / closing door cooling duct communicates with a floor surface cooling duct.

FIG. 9 is an explanatory view of the refrigerator compartment in which the influence of heat from the dew condensation preventing heat source provided on the refrigerator compartment plate separating the refrigerator compartment and the vegetable compartment is avoided.

FIG. 10 is an overall schematic explanatory view in which the influence of heat from a dew condensation preventing heat source provided on a refrigerated partition plate and a heat insulating partition plate is avoided.

[Explanation of symbols]

 Reference Signs List 3 Insulated box 5 Refrigerator 15 Opening door 17 Evaporator 21 Cooling fan 27a Cooling wall 33 Opening door cooling duct

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Kashima, Inventor 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Corporation Head Office (72) Inventor Yuko Hongo 1-1-1, Shibaura, Minato-ku, Tokyo Stock (72) Kumiko Yamaguchi, 1-1-1, Shibaura, Minato-ku, Tokyo In-house Corporation (72) Daishin Okada 1-1-1, Shibaura, Minato-ku, Tokyo, Ltd. Toshiba head office

Claims (11)

[Claims] 1. A refrigerating compartment comprising a heat-insulating box, an opening / closing door having a storage part such as a door pocket, a dedicated evaporator and a cooling fan, and the inside of the refrigerator compartment by the evaporator. In a refrigerator having a plurality of cooling wall surfaces, an opening / closing door cooling duct through which cool air flows is provided between an inner wall surface of the opening / closing door and a back wall surface of the storage section. 2. A cooling wall in a refrigerator through which cold air cooled by the cooling wall flows is provided on a cooling wall of the refrigerator compartment. When the door is closed, the cooling duct in the refrigerator and the door cooling duct communicate with each other. 2. The refrigerator according to claim 1, wherein a cooling air circulation cooling passage for circulating is formed. 3. A communication passage connecting the cooling duct in the refrigerator and the opening / closing door cooling duct has a heat transfer preventing means for preventing heat transfer from a dew condensation preventing heat source provided on an opening edge of the refrigerator compartment. The refrigerator according to claim 2, wherein: 4. The refrigerator according to claim 2, wherein the in-compartment cooling duct forms an air curtain that covers an entrance of the refrigerator compartment when the opening / closing door is opened. 5. The refrigerator according to claim 1, wherein the opening / closing door cooling duct communicates with a cool air inlet provided in a storage section of the opening / closing door. 6. The refrigerator according to claim 1, wherein a cold air passage communicating with the door cooling duct is provided at the bottom of the storage part of the door. 7. The cold air passage provided at the bottom of the storage section,
7. The refrigerator according to claim 6, wherein the refrigerator communicates with the inside of the refrigerator compartment through a cool air passage opening. 8. The refrigerator according to claim 2, wherein the cool air circulation cooling passage flows from the opening / closing door cooling duct to a floor cooling duct provided on a floor inside the refrigerator compartment. 9. The cooling air flowing through the opening / closing door cooling duct, wherein the cold air flows into the refrigerator compartment while avoiding thermal contact with a dew condensation preventing heat source provided on the periphery of the opening of the refrigerator compartment. The refrigerator-freezer according to any one of the above. 10. An evaporator and a cooling fan are respectively provided in a refrigerator compartment and a freezer compartment partitioned by a heat insulating partition wall, and a partition wall cooling duct is provided in the heat insulating partition wall on the side of the refrigerator compartment. 2. The refrigerator according to claim 1, wherein when the door is closed, a cool air circulation cooling passage through which the cool air flows from the opening / closing door cooling duct to the inside of the partition wall cooling duct is formed. 11. A communication passage connecting the door cooling duct and the partition wall cooling duct has a heat transfer preventing means for preventing heat transfer from a dew condensation preventing heat source provided on the periphery of the opening of the refrigerator compartment. The refrigerator-freezer according to claim 10, characterized in that: