JP2002267320A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator in which chill circulated in the compartment can be returned smoothly back to a cooler and cooling power can be provided without increasing the number of coolers. SOLUTION: The refrigerator comprises a cooler 15 arranged such that the intermediate stage is located in the rear of a thermal insulation partitioner 6 and the part from the intermediate stage to the lower stage is located on the back of a freezing compartment 9, a fan 16 disposed above and supplying chill generated from the cooler 15 into a refrigerating compartment 7 and a vegetable compartment 8, a fan 16' disposed at the opening 14'a of a baffle plate 14' between the back face of the freezing compartment 9 and the cooler 15 and supplying chill generated from the cooler 15 into the freezing compartment 9, and horizontal chill return ducts 27 and 28 extending back and forth while being sectioned vertically by the thermal insulation partitioner 6 and returning chill supplied by means of the fans 16 and 16' and circulated in the compartment back to the cooler 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a refrigerator, and more particularly, to a structure around a cooler for forcibly circulating cool air.

[0002]

2. Description of the Related Art As shown in FIG. 4, for example, a conventional electric refrigerator has an outer box 2 made of a steel plate and an inner box 3 made of a synthetic resin.
(Also referred to as a heat-insulating box) comprising a foam heat-insulating material 4 and two heat-insulating partition members 5 inside thereof (inner box 3).
6, a compartment is formed into an upper refrigerator compartment 7, a central vegetable compartment 8, and a lower freezer compartment 9.
1 and 12 are provided.

On the back of the vegetable compartment 8 and the freezing compartment 9, a circular cold air outlet 14a is provided at the center of the upper part, and a partition plate 14 provided with a rectangular cool air return port at the substantially center of the lower part is erected. The cooler room 13 is partitioned, and a cooler 15 including a large number of fins and heat transfer tubes orthogonal thereto is provided in the cooler room 13.
And a blower 16 for sending out the cool air generated by the cooler 15 to the inside of the refrigerator.
The return cold air sent out and circulated in the refrigerator was circulated to the cooler 15.

Further, the blower 16 for forced air circulation is provided above the cooler 15, a defrost heater 17 is provided below the cooler 15, and a drain gutter 18 is provided below the cooler chamber 13. The cooler 1 flowing down to the drain gutter 18
The defrost water 5 flows through a drain pipe 19 into an evaporating dish 22 in a machine room 21 in which a compressor 20 and the like are arranged, and is evaporated.

A heat insulating wall 23 for the vegetable compartment 8 is provided in front of the upper part of the partition plate 14, and the heat insulating wall 23 and the partition plate 1 are provided.
The upper part of the air passage 24 formed between the refrigeration room 7
The lower portion communicates with the cool air supply passage 25 at the back, and the lower portion communicates with the cool air supply passage 26 having the cool air outlets 26a and 26b at the back of the freezing compartment 9 and is supplied to the refrigerator compartment 7 via the cool air supply passage 25. Cool air is supplied to the vegetable compartment 8 from a cool air supply hole 5a formed in front of the heat insulating partition 5, and returned cool air returns to a lower rear portion of the cooler room 13 via a cool air return duct 27 shown by a broken line. On the other hand, the cold air outlet 26
The cool air supplied to the freezing compartment 9 from the a and 26b is returned to the lower part of the cooler room 13 through a cool air return duct 28 communicating with the cool air return port 14b formed in the partition plate 14. I have.

However, in the refrigerator, the cool air return duct 27 from the vegetable room 8 and the cool air return duct 28 from the freezer room 9 are gathered below the cooler 15, so that in particular, the vegetable room 8 The cold air return duct 27 on the side was complicated, and assembly was troublesome. Further, in recent refrigerators, the refrigerator in which the freezing compartment 9 is disposed below is mainly used, and in order to further improve the cooling effect, a plurality of coolers dedicated to a plurality of storage compartments are provided. However, there is a problem that the number of parts and the number of assembling steps are increased, and there is a possibility that the internal volume of the refrigerator is reduced.

The heat capacity of the defrost heater 17 is as follows:
It is necessary to select a heat generation capacity necessary for reliably performing the defrosting of the cooler 15, and there is a problem that the heat generation temperature is high and the cooling effect or the energy saving may be affected.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention is capable of smoothly returning cold air circulating in a refrigerator and returning to a cooler, and increasing the cooling capacity without increasing the number of coolers. It is an object of the present invention to provide a refrigerator that can reduce the heat generation temperature during defrosting.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention divides the inside of a heat insulating box, which is filled with a heat insulating material between an outer box and an inner box, into upper and lower sections by a heat insulating partition. A storage room at the top and a freezing room at the bottom, and a cooler room is defined by a back surface of the storage room, a back surface of the freezer room, and a rear end of the heat-insulating partition, generating cool air in the cooler room. A cooler is provided, a defrost heater is provided at the lower part of the cooler, a blower is provided for sending out the cool air generated by the cooler into the refrigerator, and the return cool air sent out by the blower and circulated in the refrigerator is provided. A plurality of cool air return ducts are formed in the heat insulating partition, and arranged behind the heat insulating partition so as to locate the middle stage of the cooler, and each of the cool air return ducts circulates electricity to the cooler. In the refrigerator, the cool air generated by the cooler is A cooler is supplied to the upper storage chamber through a cool air supply path by a blower, and the return cool air from the storage chamber is returned to a middle stage of the cooler through a first cool air return duct, while cool air is supplied by a second blower. Cool air is supplied to the lower freezing room through a passage, and returned cool air from the same
The cooler is returned to the middle stage through the cool air return duct.

[0010] A space is provided in the middle stage of the cooler.

[0011] A blower for sending cool air is provided between the heat insulating partition and the cooler which form each of the cool air return ducts.

A temperature detector is attached to each of the upper and lower ends of the cooler.

The interior of a heat-insulating box body filled with a heat-insulating material between an outer box and an inner box is vertically divided by a heat-insulating partition, and a storage room is provided at an upper portion and a freezing room is provided at a lower portion. The rear, and the rear of the freezer compartment and the rear end of the heat insulating partition to partition a cooler room, provided a cooler to generate cool air in the cooler room, provided a defrost heater at the bottom of the cooler, A blower is provided for sending the cool air generated by the cooler into the refrigerator, and the return cool air sent by the blower and circulated in the refrigerator is formed with a plurality of cool air return ducts in the heat insulating partition, and the heat insulating partition is formed. Behind, arranged so that the middle stage of the cooler is located, circulated to the cooler by each of the cool air return ducts, the cool air generated by the cooler through the cool air supply path by the first blower Supply to the upper storage compartment,
The return cool air from the storage room is returned to the middle stage of the cooler through a first cool air return duct, and the second blower supplies cool air to the lower freezing room via a cool air supply path, and the refrigeration is performed. In the method for controlling a refrigerator by a temperature detection device attached to the cooler, the return of the cool air from the room to the middle stage of the cooler via a second cool air return duct, Are controlled respectively.

[0014] A second defrosting device is provided in the space.

[0015] A code heater is provided on the inner box surface on the back of the cooler.

The heat generated by each defroster is lower than that of one defroster.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. FIG. 1 is a side sectional view (A) of a refrigerator showing a mode of a first embodiment according to the present invention, and an enlarged side sectional view (B) of a main part showing a cooler room, and FIG. FIG. 3A is a side sectional view of a refrigerator showing an embodiment of the second embodiment, and FIG. 3B is an enlarged side sectional view of a main part showing a cooler room. FIG. 3 is a defrosting device for a cooler room according to the present invention. Main part enlarged sectional view (A) showing the embodiment of
(B) and (C). Note that the same reference numerals are used for the same parts as in the related art.

1 (A) and 1 (B) are side views showing the internal structure of a refrigerator of a forced air circulation system, in which 1 is an outer box 2 made of a steel plate and an inner box made of a synthetic resin. 3 and
A refrigerator body (also referred to as a heat-insulating box) composed of the foamed heat-insulating material 4, and the inside thereof (the inner box 3) has two heat-insulating partitions 5, 6.
Thus, a refrigerator compartment 7 at the upper part, a vegetable compartment 8 at the center, and a freezing compartment 9 at the lower part are formed, and doors 10 and 1 are respectively formed.
1 and 12 are provided.

Reference numeral 13 denotes a partition plate 14 on the back of the vegetable compartment 8 and a partition plate 14 'on the back of the freezer compartment 9, and a rear end of the heat insulating partition 6 between the partition plate 14 and the partition plate 14'. The divided cooler room 15 is provided in the cooler room 13, the middle stage is arranged so as to be located behind the heat insulating partition body 6, and the middle stage to the lower stage are located on the back surface of the freezing compartment 9. , Which comprises a large number of fins and heat transfer tubes orthogonal to the fins, is provided above and sends out the cold air generated by the cooler 15 into the refrigerator compartment 7 and the vegetable compartment 8. The blower 16 ′ is provided in an opening 14 ′ a of the partition plate 14 ′ between the back surface of the freezing compartment 9 and the cooler 15, and cools the cold air generated by the cooler 15 in the freezer compartment 9. Blower, and 27, 2
Reference numeral 8 denotes a horizontal cold air return section which is vertically divided by the heat insulating partition 6 and extends back and forth for circulating the return cool air sent out by the blowers 16 and 16 ′ and circulated in the refrigerator to the cooler 15. It is a duct.

The blower 1 for forced circulation of cold air
6 and 16 ′, a space is formed in the middle of the cooler 15 to facilitate return cold air circulating in the refrigerator to the cooler 15, and defrosting is provided at a lower portion of the cooler room 13. A heater 17 is provided, and a drain gutter 18 is provided below the defrost heater 17. The defrost water of the cooler 15 flowing down to the drain gutter 18 is provided through a drain pipe 19 to a compressor 20 and the like. It flows into the evaporating dish 22 in the machine room 21 and is evaporated.

At the front of the partition plate 14, a heat insulating wall 23 for the vegetable room 8 is provided, and the upper part of the cooler room 13 communicates with a cool air supply passage 25 behind the refrigerating room 7; 2
The cold air supplied to the refrigerator compartment 7 through the cold compartment 5 is supplied to the vegetable compartment 8 from a cold air supply hole 5a formed in front of the heat insulating partition 5 and returns the cool air from the vegetable compartment to the heat insulating partition. The cooler 15 is returned to the middle stage through a first cool air return duct 27 formed in the inside of the cooler 15.

On the other hand, the front of the partition plate 14 'communicates with a cool air supply passage 26 having cool air outlets 26a and 26b at the back of the freezing compartment 9, and is connected to the cool air outlets 26a and 26b.
b to the freezing compartment 9 and return cold air from the freezing compartment is returned to the middle stage of the cooler 15 via a second cool air return duct 28 formed in the heat insulating partition 6. I have.

The return cool air from the first cool air return duct 27 is sent upward from the middle stage of the cooler 15 and heat exchange is performed by the cooler 15, and the cooled cool air is supplied to the cool air supply 7 behind the refrigerator compartment 7. On the other hand, while returning to the passage 25, the return cool air from the second cool air return duct 28 is sent downward from the middle stage of the cooler 15, and after exchanging heat in the cooler 15, the cooled cool air is transferred to the back of the freezing compartment 9 To the cold air supply path 26.

As described above, each return cold air is branched and sent upward and downward from the middle stage of the cooler 15, and after the heat exchange in the cooler 15, two systems of cooled cold air are respectively sent out. By configuring the cool air circuit, the structure of the cool air return ducts 27 and 28 is simplified, and the assembly is also facilitated. In addition, there is no need to provide a plurality of coolers dedicated to a plurality of storage rooms, and the number of parts and the number of assembling steps are increased, and problems such as a reduction in the internal volume of the refrigerator can be eliminated.

Then, the refrigerator compartment 7 and the vegetable compartment 8
And the cooler 15 used separately for the two systems of the freezing room 9
In addition, a temperature detection sensor 29 for the refrigerator compartment 7 and the vegetable compartment 8 and a temperature detection sensor 30 for the freezer compartment 9 are attached to the upper and lower ends of the cooler 15, respectively.
According to 9 and 30, the blowers 16 and 16 'for sending the cool air are provided.
Are controlled to improve cooling efficiency and save energy.

FIG. 2 shows a second embodiment according to the present invention, wherein the refrigerator compartment 7 and the vegetable compartment 8 and the freezing compartment 9
In the two systems of the cool air circuit for forcibly circulating the cool air, a blower 16 for sending cool air for the refrigerating room 7 and the vegetable room 8 and a blower 16 ′ for sending cool air for the freezing room 9 are provided, respectively. A blower 16 ″ for sending cool air is provided between the heat insulating partition 6 forming the respective cool air return ducts 27 and 28 and the cooler 15. By providing the blower 16 ″ for sending cool air, , Can increase the cooling capacity.

FIG. 3 is a sectional view showing an embodiment of a defroster for a cooler chamber according to the present invention, and FIG. 3 (A) and FIG.
FIG. 3B is a diagram in which a second defrost heater 17 ′ is provided in the middle space 15 a of the cooler 15, and FIG.
As shown in (C), a code heater 17 ″ is provided on the inner box 3 on the back surface of the cooler 15, and the defrost heater 17 or the second defrost heater 17 ′ below the cooler 15.
(Not shown).

By providing the cooler 15 with a plurality of the defrost heaters 17 and 17 'or the code heater 17 ", the frost formed on the fins of the cooler 15 can be efficiently removed. Can be defrosted,
The heating temperature of each of the defrost heaters 17 and 17 'or the code heater 17 "can be made lower than that of one of the defrost heaters 17, eliminating problems that might affect the cooling effect and energy saving. Further, by lowering the heat generation temperature, it is possible to respond to a combustible refrigerant while satisfying the current defrosting performance.

With the above-described structure, by forming a two-system cool air circuit, the structure of the cool air return ducts 27 and 28 is simple and easy to assemble. Further, there is no need to provide a plurality of coolers and the number of parts is reduced. In addition, the number of assembling steps can be reduced, and there is no danger of reducing the internal volume of the refrigerator. Also,
By providing a configuration in which two defrosting devices are provided for the cooler 15, the defrosting of the cooler 15 can be performed efficiently, the heat generation temperature can be lowered, and the cooling effect, energy saving, etc. In addition, by lowering the heat generation temperature, it is possible to cope with a flammable refrigerant.

[0030]

As described above, according to the present invention, it is possible to smoothly circulate the cool air returning to the cooler by circulating in the refrigerator, and
The refrigerator has a cooling capacity without increasing the number of coolers, and can reduce the heat generation temperature during defrosting.

[Brief description of the drawings]

FIG. 1A is a side sectional view of a refrigerator showing a first embodiment according to the present invention, and FIG. 1B is an enlarged side sectional view of a main part showing a cooler chamber.

FIGS. 2A and 2B are a side sectional view of a refrigerator according to a second embodiment of the present invention and an enlarged side sectional view of a main part showing a cooler chamber.

FIGS. 3A and 3B are enlarged cross-sectional views of main parts showing an embodiment of a defroster for a cooler chamber according to the present invention; FIGS.

FIG. 4 is a side sectional view of a refrigerator showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body (insulated box body) 2 Outer box 3 Inner box 4 Foam insulation material 5 Insulated partition 5a Cold air supply hole 6 Insulated partition 7 Cold room 8 Vegetable room 9 Freezer room 10 Door 11 Door 12 Door 13 Cooler room 14 Partition plate 14a Cold air outlet 14b Cold air return port 14 'Partition plate 14'a Opening 15 Cooler 15a Space 16 Blower 16' Blower 16 "Blower 17 Defrost heater 17 'Defrost heater 17" Code heater 18 Drain gutter 19 Drain pipe 20 Compressor 21 Machine room 22 Evaporating dish 23 Insulated wall 24 Blow path 25 Cold air supply path 26 Cold air supply path 26 a Cold air outlet 26 b Cold air outlet 27 Cold air return duct 28 Cold air return duct 29 Temperature sensor 30 Temperature sensor

Claims (8)

[Claims] An interior of a heat insulating box body filled with a heat insulating material between an outer box and an inner box is vertically divided by a heat insulating partition, and a storage room is provided at an upper portion, and a freezing room is provided at a lower portion, A cooler room is defined by a back surface of the storage room, a back surface of the freezing room, and a rear end of the heat insulating partition, a cooler for generating cool air is provided in the cooler room, and a defrost heater is provided at a lower portion of the cooler. Providing a blower for sending cool air generated by the cooler into the refrigerator, forming a plurality of cool air return ducts in the heat-insulating partition, and forming return cool air sent by the blower and circulated in the refrigerator. An electric refrigerator arranged behind the partition body so that the middle stage of the cooler is located and circulated to the cooler by each of the cool air return ducts, wherein the first air blower cools the cool air generated by the cooler. To the upper storage room via the cold air supply path And returning the return cool air from the storage room to the middle stage of the cooler through a first cool air return duct, while supplying cool air to the lower freezing room through a cool air supply path by a second blower. A refrigerator configured to return cold air returned from the freezing room to a middle stage of the cooler through a second cold air return duct. 2. The refrigerator according to claim 1, wherein a space is provided in a middle stage of the cooler. 3. The refrigerator according to claim 1, further comprising a blower for sending cool air between the heat-insulating partition body forming each of the cool air return ducts and the cooler. 4. The refrigerator according to claim 1, wherein temperature detectors are respectively attached to upper and lower ends of the cooler. 5. A heat insulating box body filled with a heat insulating material between an outer box and an inner box is vertically partitioned by a heat insulating partition, and a storage room is provided at an upper part and a freezing room is provided at a lower part. A cooler room is defined by a back surface of the storage room, a back surface of the freezing room, and a rear end of the heat insulating partition, a cooler for generating cool air is provided in the cooler room, and a defrost heater is provided at a lower portion of the cooler. Providing a blower for sending cool air generated by the cooler into the refrigerator, forming a plurality of cool air return ducts in the heat-insulating partition, and forming return cool air sent by the blower and circulated in the refrigerator. Behind the partition, arranged so that the middle stage of the cooler is located, circulated to the cooler by each of the cool air return ducts, the cool air generated by the cooler to the cool air supply path by the first blower To the upper storage compartment via
The return cool air from the storage room is returned to the middle stage of the cooler through a first cool air return duct, and the second blower supplies cool air to the lower freezing room via a cool air supply path, and the refrigeration is performed. In the method for controlling a refrigerator by a temperature detector attached to the cooler, returning the return cool air from the chamber to a middle stage of the cooler via a second cool air return duct, A method for controlling a refrigerator, wherein each of the blowers is controlled. 6. The refrigerator according to claim 2, wherein a second defrosting device is provided in the space. 7. The refrigerator according to claim 1, wherein a code heater is provided on the inner box surface on the back of the cooler. 8. The apparatus according to claim 6, wherein the heat generation temperature of each of the defrosters is lower than that of one defroster.
Or the refrigerator according to 7.