JP4197851B2 - refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator, and more particularly to a structure around a cooler for forcibly circulating cool air.
[0002]
[Prior art]
For example, as shown in FIG. 4, a conventional electric refrigerator is a refrigerator main body (also referred to as a heat insulating box), which includes a steel plate outer box 2, a synthetic resin inner box 3, and a foam heat insulating material 4. The interior (inner box 3) is partitioned into two upper insulating compartments 5, 6 into an upper refrigerator compartment 7, a central vegetable compartment 8, and a lower freezer compartment 9, and doors 10, 11 respectively. , 12 are provided.
[0003]
A cooler room is provided by standing up a partition plate 14 provided with a circular cold air outlet 14a at the upper center and a square cold air outlet at the lower center of the back of the vegetable compartment 8 and the freezer compartment 9. 13 is provided, and a cooler 15 comprising a large number of fins and heat transfer pipes orthogonal to the fins is provided in the cooler chamber 13, and the cool air generated by the cooler 15 is sent to the upper part of the cooler 15. The blower 16 to be provided was provided, and the return cold air that was sent out by the blower 16 and circulated through the inside of the cabinet was circulated to the cooler 15.
[0004]
In addition, the blower 16 for forced air circulation is provided above the cooler 15, the defrost heater 17 is provided below, and the drainage tub 18 is provided below the cooler chamber 13. The defrost water of the cooler 15 that has flowed down to the drainage basin 18 flows into the evaporating dish 22 in the machine room 21 in which the compressor 20 and the like are disposed via the drainage pipe 19 and is evaporated.
[0005]
A heat insulating wall 23 with the vegetable compartment 8 is provided in front of the upper portion of the partition plate 14, and the upper portion of the air passage 24 formed between the heat insulating wall 23 and the partition plate 14 is cold air behind the refrigerator compartment 7. The lower part communicates with the cold air supply path 26 having the cold air outlets 26a and 26b on the back of the freezer compartment 9, and the cold air supplied to the refrigerator compartment 7 through the cold air supply path 25 is communicated with the supply passage 25. The cold air supply hole 5a formed in front of the heat insulating partition 5 is supplied to the vegetable compartment 8, and the return cold air is returned to the lower rear part of the cooler compartment 13 through a cold air return duct 27 indicated by a broken line. The cold air supplied from the cold air outlets 26a and 26b to the freezing chamber 9 is placed in the lower part of the cooler chamber 13 via a cold air return duct 28 communicating with the cold air return port 14b formed in the partition plate 14. It comes to return.
[0006]
However, in the refrigerator, the cold air return duct 27 from the vegetable compartment 8 and the cold air return duct 28 from the freezer compartment 9 are gathered below the cooler 15, so The cold return duct 27 was complicated and the assembly was troublesome. In recent refrigerators, the one in which the freezer compartment 9 is disposed below is the mainstream, and in order to further improve the cooling effect, a plurality of coolers dedicated to a plurality of storage compartments are provided. However, the number of parts and the number of assembling steps are increased, and there is a problem that there is a risk of reducing the internal volume.
[0007]
Further, as the heat generation capacity of the defrost heater 17, it is necessary to select a heat generation capacity necessary for surely performing the defrosting of the cooler 15, the heat generation temperature is high, the influence on the cooling effect, energy saving, etc. Had a problem of fear.
[0008]
[Problems to be solved by the invention]
In view of the above-mentioned problems, the present invention can smoothly circulate the return air that circulates in the cabinet and returns to the cooler, has a cooling capacity without increasing the number of coolers, and increases the heat generation temperature during defrosting. The object is to provide a refrigerator that can be lowered.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention divides the interior of a heat insulating box formed by filling a heat insulating material between an outer box and an inner box into upper and lower parts by means of a heat insulating partition, and stores a storage chamber in the upper part and a lower part. A freezer compartment is provided, a cooler compartment is defined by the rear face of the storage compartment, the rear face of the freezer compartment and the rear end of the heat insulating partition, and a cooler for generating cool air is provided in the cooler compartment. A defrost heater is provided at the lower part of the fan, and a blower that sends out the cold air generated by the cooler to the inside of the cabinet is provided, and the return cold air that is sent out by the blower and circulated in the cabinet is returned to the heat insulating partition. In an electric refrigerator that forms a duct and is arranged behind the heat insulating partition so that the middle stage of the cooler is positioned, and is circulated to the cooler by the cold air return ducts.
Cold air generated by the cooler is supplied to the upper storage chamber via a cool air supply path by a first blower, and the return cold air from the storage chamber is supplied to the cooler via a first cool air return duct. While returning to the middle stage, the second blower supplies cold air to the lower freezing chamber via the cold air supply path, and returns the cold air from the freezing chamber to the middle stage of the cooler via the second cold air return duct. The configuration is returned.
[0010]
A space is provided in the middle stage of the cooler.
[0011]
It is the structure which provided the air blower for cold air feeding between the said heat insulation partition which forms each said cold air return duct, and the said cooler.
[0012]
A temperature detection device is provided at each of the upper and lower ends of the cooler.
[0013]
The interior of the heat insulation box formed by filling a heat insulating material between the outer box and the inner box is vertically divided by a heat insulating partition, and a storage room is provided in the upper part, and a freezing room is provided in the lower part. A cooler chamber is defined by a rear surface of the freezer compartment and a rear end of the heat insulating partition, a cooler for generating cool air is provided in the cooler chamber, a defrost heater is provided at a lower portion of the cooler, and the cooler Provided with a blower that sends out the cold air generated in the chamber, and a plurality of cool air return ducts are formed in the heat insulation partition, and the return cold air that is sent out by the fan and circulated in the store is formed behind the heat insulation partition. The cooler is disposed so as to be located in the middle stage, and is circulated to the cooler by the cool air return ducts. The cool air generated by the cooler is disposed in the upper part through a cool air supply path by a first blower. Supply to the storage room, and return cold air from the storage room to the first While returning to the middle stage of the cooler via the air return duct, the second blower supplies cold air to the lower freezer compartment via the cold air supply path, and returns the return cold air from the freezer compartment to the second cold air return. In the control method of the refrigerator by the temperature detection device attached to the cooler, returning to the middle stage of the cooler through the duct,
The temperature detection device controls each of the cool air delivery fans.
[0014]
It has the structure which provided the 2nd defrost apparatus in the said space.
[0015]
A cord heater is provided on the inner box surface on the back of the cooler.
[0016]
The heat generation temperature of each of the defrosting devices is lower than that of one defrosting device.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described as examples based on the accompanying drawings.
FIG. 1 is a side sectional view (A) of a refrigerator showing a form of a first embodiment according to the present invention, and an enlarged side sectional view (B) showing a main part of a refrigerator chamber, and FIG. FIG. 3 is a side sectional view (A) of the refrigerator showing the form of the second embodiment, and an enlarged side sectional view (B) showing the main part of the cooler chamber, and FIG. 3 is a defroster for the cooler chamber according to the present invention. It is a principal part expanded sectional view (A) which shows the Example of, and (B) and (C).
In addition, the code | symbol of the same part as the past shall be the same.
[0018]
1 (A) and 1 (B) show the internal structure of a cold air forced circulation type refrigerator from the side. In the figure, 1 is an outer box 2 made of steel plate, an inner box 3 made of synthetic resin, In the refrigerator main body (also referred to as a heat insulation box) made of the foam heat insulating material 4, the inside (inner box 3) is divided into two heat insulation partitions 5, 6 by an upper refrigerator room 7, a central vegetable room 8, A compartment is formed in the lower freezer compartment 9, and doors 10, 11, and 12 are provided for each.
[0019]
13 is a partition plate 14 on the back of the vegetable compartment 8, a partition plate 14 ′ on the back of the freezer compartment 9, and cooling partitioned by the rear end of the heat insulating partition 6 between the partition plate 14 and the partition plate 14 ′. The chambers 15 are provided in the cooler chamber 13, and the middle stage is disposed so as to be located behind the heat insulating partition 6, and the middle stage to the lower stage are disposed on the back surface of the freezer compartment 9. A cooler composed of a large number of fins and a heat transfer pipe perpendicular to the fins, 16 is an air blower that is provided above and sends out the cold air generated by the cooler 15 into the refrigerator compartment 7 and the vegetable compartment 8; 'Is provided in the opening 14'a of the partition plate 14' between the back surface of the freezer compartment 9 and the cooler 15, and sends out the cool air generated by the cooler 15 into the freezer compartment 9 Blowers and 27 and 28 are sent out by the respective fans 16 and 16 '. Is for circulating return cold air circulates inside the refrigerator into the cooler 15, a horizontal-shaped cold air return duct extending in the front is divided up and down in the heat insulating partition member 6.
[0020]
And while providing the said air blowers 16 and 16 'for cold air forced circulation, in order to make it easy to circulate the return cold air which circulated the inside of the store | warehouse | chamber to the said cooler 15 in the middle stage of the said cooler 15, the said cooling A defrost heater 17 is provided at the lower part of the chamber 13, and a drainage basin 18 is provided below the defroster heater 17. The defrost water of the cooler 15 that has flowed into the drainage basin 18 is a drain pipe 19. It flows into the evaporating dish 22 in the machine room 21 in which the compressor 20 and the like are disposed through the evaporating plate to evaporate.
[0021]
A heat insulating wall 23 for the vegetable compartment 8 is provided at the front portion of the partition plate 14, and the upper portion of the cooler compartment 13 communicates with the cold air supply passage 25 behind the refrigerating compartment 7, via the cold air supply passage 25. The cold air supplied to the refrigerator compartment 7 is supplied to the vegetable compartment 8 from a cold air supply hole 5a formed in front of the heat insulation partition 5, and the return cold air from the vegetable compartment is put into the heat insulation partition 6. It returns to the middle stage of the cooler 15 through the formed first cool air return duct 27.
[0022]
On the other hand, in front of the partition plate 14 ′, it communicates with a cold air supply passage 26 having cold air outlets 26 a and 26 b on the back of the freezer compartment 9, and is supplied to the freezer compartment 9 from the cold air outlets 26 a and 26 b. The return cold air from the freezer compartment is returned to the middle stage of the cooler 15 via a second cold air return duct 28 formed in the heat insulating partition 6.
[0023]
The return cold air from the first cold air return duct 27 is sent upward from the middle stage of the cooler 15, and after the heat exchange in the cooler 15, the cooled cold air is sent to the cool air supply path 25 behind the refrigerator compartment 7. On the other hand, the return cold air from the second cold air return duct 28 is sent downward from the middle stage of the cooler 15, and after the heat exchange in the cooler 15, the cooled cold air is sent to the cool air on the back of the freezer compartment 9. It is sent to the supply path 26.
[0024]
As described above, each of the return cold air is branched and sent from the middle stage of the cooler 15 to the upper side and the lower side, and after the heat exchange in the cooler 15, the two cool air circuits for sending the cooled cold air respectively. By configuring, the structure of the cold return ducts 27 and 28 is simplified, and the assembly is facilitated. Further, it is not necessary to provide a plurality of coolers dedicated to the storage chambers, the number of parts and the number of assembling steps can be increased, and problems such as a reduction in the internal volume can be eliminated.
[0025]
The refrigerator 15 used for the refrigerator compartment 7 and the vegetable compartment 8 and the freezer compartment 9 is selectively used for the temperature sensor 29 for the refrigerator compartment 7 and the vegetable compartment 8 and for the freezer compartment 9. The temperature detection sensors 30 are attached to the upper and lower ends of the cooler 15, respectively, and the cooling air blowers 16 and 16 ′ are controlled by the temperature detection sensors 29 and 30, respectively, thereby improving the cooling efficiency and saving energy. I am trying.
[0026]
FIG. 2 shows a second embodiment according to the present invention. In the cold air circuit 7 and the vegetable room 8 and the freezing room 9, the cold air chamber 7 and the vegetables A cool air delivery blower 16 for the chamber 8 and a cool air delivery blower 16 ′ for the freezer compartment 9 are provided, respectively, and the heat insulating partition 6 and the cooler 15 that form the cold return ducts 27 and 28. The cooling air blower 16 ″ is provided between the two, and the cooling capacity can be further improved by providing the cool air feeding blower 16 ″.
[0027]
FIG. 3 is a cross-sectional view showing an embodiment of a defroster for a cooler chamber according to the present invention. FIGS. 3 (A) and 3 (B) show a second space 15a in the middle of the cooler 15 and a second portion. The defrosting heater 17 'is provided, and a cord heater 17 "is provided on the inner box 3 on the back of the cooler 15 as shown in FIG. The defrosting heater 17 or the second defrosting heater 17 ′ (not shown) may be used as an alternative.
[0028]
By providing the cooler 15 with a plurality of the defrost heaters 17, 17 ′ or the cord heater 17 ″, the frost formed on the fins of the cooler 15 is efficiently defrosted. In addition, the heat generation temperature of each of the defrosting heaters 17 and 17 ′ or the cord heater 17 ″ can be made lower than that of the single defrosting heater 17, and there is a risk of affecting the cooling effect or energy saving. It is possible to eliminate some problems.
In addition, by reducing the heat generation temperature, it is possible to cope with a combustible refrigerant while satisfying the current defrosting performance.
[0029]
With the above configuration, by constructing two cold air circuits, the structure of the cold air return ducts 27 and 28 is simple and easy to assemble, and it is not necessary to provide a plurality of coolers. Less, and there is no fear of reducing the internal volume.
Moreover, by setting it as the structure which provided the 2 unit | set defrost apparatus with respect to the said cooler 15, the defrost of the said cooler 15 can be performed efficiently, heat_generation | fever temperature can be made low temperature, a cooling effect, There is no problem in energy saving or the like, and furthermore, by reducing the heat generation temperature, it is possible to cope with a flammable refrigerant.
[0030]
【The invention's effect】
As described above, according to the present invention, the return cold air that circulates in the warehouse and returns to the cooler can be smoothly circulated, and has a cooling capacity without increasing the number of coolers and lowers the heat generation temperature during defrosting. It becomes a refrigerator that can be.
[Brief description of the drawings]
FIG. 1 is a side sectional view (A) of a refrigerator showing a form of a first embodiment according to the present invention, and an enlarged side sectional view (B) of a main part showing a cooler chamber.
FIG. 2 is a side sectional view (A) of a refrigerator showing a form of a second embodiment according to the present invention and an enlarged side sectional view (B) of a main part showing a cooler chamber.
FIG. 3 is an enlarged sectional view (A), (B) and (C) of a main part showing an embodiment of a defroster for a cooler chamber according to the present invention.
FIG. 4 is a side sectional view of a refrigerator showing a conventional example.
[Explanation of symbols]
1 Refrigerator body (insulation box)
2 Outer box 3 Inner box 4 Foam heat insulating material 5 Heat insulation partition 5a Cold air supply hole 6 Heat insulation partition 7 Refrigerated room 8 Vegetable room 9 Freezer room
10 door
11 Door
12 doors
13 Cooler room
14 Partition plate
14a Cold air outlet
14b Cold return port
14 'divider
14'a opening
15 Cooler
15a space
16 Blower
16 'blower
16 "blower
17 Defrost heater
17 'defrost heater
17 ”code heater
18 Drainage
19 Drain pipe
20 Compressor
21 Machine room
22 Evaporating dish
23 Insulation wall
24 Air duct
25 Cold air supply path
26 Cold air supply path
26a Cold air outlet
26b Cold air outlet
27 Cold return duct
28 Cold return duct
29 Temperature detection sensor
30 Temperature sensor

Claims (8)

The interior of the heat insulation box formed by filling a heat insulating material between the outer box and the inner box is vertically divided by a heat insulating partition, and a storage room is provided in the upper part, and a freezing room is provided in the lower part. A cooler chamber is defined by a rear surface of the freezer compartment and a rear end of the heat insulating partition, a cooler for generating cool air is provided in the cooler chamber, a defrost heater is provided at a lower portion of the cooler, and the cooler Provided with a blower that sends out the cold air generated in the chamber, and a plurality of cool air return ducts are formed in the heat insulation partition, and the return cold air that is sent by the blower and circulated in the store is formed behind the heat insulation partition. In the electric refrigerator, which is arranged so as to locate the middle stage of the cooler, and circulates to the cooler by the cold air return ducts,
Cold air generated by the cooler is supplied to the upper storage chamber via a cool air supply path by a first blower, and the return cold air from the storage chamber is supplied to the cooler via a first cool air return duct. While returning to the middle stage, the second blower supplies cold air to the lower freezing chamber via the cold air supply path, and returns the cold air from the freezing chamber to the middle stage of the cooler via the second cold air return duct. A refrigerator characterized by being returned. The refrigerator according to claim 1, wherein a space is provided in a middle stage of the cooler. The refrigerator according to claim 1 or 2, wherein a blower for feeding cool air is provided between the heat insulating partition forming the cool air return ducts and the cooler. The refrigerator according to any one of claims 1 to 3, wherein temperature detectors are attached to upper and lower ends of the cooler, respectively. The interior of the heat insulation box formed by filling a heat insulating material between the outer box and the inner box is vertically divided by a heat insulating partition, and a storage room is provided in the upper part, and a freezing room is provided in the lower part. A cooler chamber is defined by a rear surface of the freezer compartment and a rear end of the heat insulating partition, a cooler for generating cool air is provided in the cooler chamber, a defrost heater is provided at a lower portion of the cooler, and the cooler Provided with a blower that sends out the cold air generated in the chamber, and a plurality of cool air return ducts are formed in the heat insulation partition, and the return cold air that is sent by the blower and circulated in the store is formed behind the heat insulation partition. The cooler is disposed so as to be located in the middle stage, and is circulated to the cooler by the cool air return ducts. The cool air generated by the cooler is disposed in the upper part through a cool air supply path by a first blower. Supply to the storage room, and return cold air from the storage room to the first While returning to the middle stage of the cooler via the air return duct, the second blower supplies cold air to the lower freezer compartment via the cold air supply path, and returns the return cold air from the freezer compartment to the second cold air return. In the control method of the refrigerator by the temperature detection device attached to the cooler, returning to the middle stage of the cooler through the duct,
The method for controlling a refrigerator, wherein the cooling air blower is controlled by the temperature detection device. The refrigerator according to claim 2, wherein a second defrosting device is provided in the space. The refrigerator according to claim 1 or 6, wherein a cord heater is provided on the inner box surface on the back surface of the cooler. The refrigerator according to claim 6 or 7, wherein the heat generation temperature of each defroster is lower than that of one defroster.

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