JP3076674B2 - Freezer refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating refrigerator having a freezer compartment and a refrigerating compartment partitioned by a partition wall, a mechanical compartment on the side of the freezer compartment, and a cooling unit disposed in the freezer compartment.

[0002]

2. Description of the Related Art In recent years, a duct-type indirect cooling system in which one cooling unit is used as a means for cooling both chambers of a refrigerator-freezer and cool air is distributed by a duct is often used.

Hereinafter, an embodiment of a conventional refrigerator-freezer will be described with reference to FIGS. 10, 11, 12, and 13. FIG.

[0004] Reference numeral 1 denotes a main body of an under-counter type refrigerator-freezer. The inside of the main body 1 is divided into two left and right chambers by a partition wall 2 made of a heat insulating wall inserted through a front opening. The other is a refrigerator compartment 4.

[0005] The upper side 3 of the freezer compartment 3 facing the partition wall 2
a, a cooling unit 5 is provided. The cooling unit 5 includes an evaporator 6 having a heater 5a (not shown) for defrosting, a refrigerating fan 7 stopping at the time of defrosting, and a cooling cover 8.
A partition plate 9 is provided at a position of the cooling cover 8 with respect to the cooling unit 5 side, and a return cool air introducing portion is provided in the refrigerator compartment 4.
A first return cold air introduction unit 10 for returning the cool air from the cooling unit 5 to the cooling unit 5 and a second return cold air introduction unit 11 for returning the cool air in the freezing room 3 to the cooling unit 5 are separated.

[0006] The wall portion 12 of the freezer compartment 3 of the first return cool air introduction section 10 is provided with a duct heater 13 for melting frost grown by the return of the humid cold air from the refrigerator compartment 4. Further, the cooling cover 8 and the lower bottom 1 of the evaporator 6 are provided.
A cool air partition plate 16 for separating the cool air discharge port 14 and the cool air suction port 15 from each other is provided between the cool air partition 3a and the cool air outlet 3a.

A machine room 17 partitioned adjacent to the cooling unit 5 is provided with a refrigeration unit including a condenser 18, a compressor 19 and the like.

In such a configuration, a cold air inlet 20 for leading to the refrigerator compartment 4 and a suction duct for leading cool air from the cold air inlet 20 to an upper outlet 21 on the side of the refrigerator compartment 4 are provided at the lower side of the partition wall 2 facing the cooling unit 5. 22 and the partition walls 2,
A discharge fan 23 for discharging cool air from the suction duct 22 and a discharge port 21 are provided on the side of the refrigerator compartment 4.

A return duct 24 is provided between the first return cold air inlet 10 from the refrigerating compartment 4 and a cool air return port 23a opened and received at a lower portion of the partition wall 2 . The return cold air introduction unit 10 is completely connected to a junction 25 provided below the first return cold air introduction unit 10.

Further, the temperature control of the freezer compartment 3
The refrigeration thermostat 26 is configured to operate and stop only the motor 27 of the compressor 19. In addition, refrigerator room 4
Is controlled by operating and stopping the discharge fan 23 in the refrigeration thermostat 28.

At the time of defrosting, the defrosting timer 29 stops the refrigerating fan 7, the discharging fan 23, and the motor 27 of the compressor, and energizes the defrosting heater 5a and the duct heater 13. Reference numeral 30 denotes a power supply unit.

The operation of the refrigerator having the above-described structure will be described below.

In order to make the explanation easy to understand, the explanation will be made separately for the normal cooling operation and the defrosting operation. First, during the normal cooling operation, the cool air heat exchanged by the evaporator 6 is discharged from the cool air discharge port 14 by the freezing fan 7 and is forcibly circulated to the freezing room 3 to cool the freezing room 3. And the return cool air introduction part 11
Thus, a cycle of flowing to the cool air suction port 15 and the evaporator 6 is formed. At this time, the temperature of the freezing compartment 3 is controlled by the freezing thermostat 26.

On the other hand, the cool air from the freezer compartment is guided to the cool air inlet 20, the suction duct 22, and the discharge fan 23 of the partition wall 2, and the operation of the discharge fan 23 is stopped by the control of the refrigeration thermostat 28. . The cool air flowing out of the freezing room 3 by the discharge fan 23 is subjected to heat exchange in the cold room 4 and then to the cool air return port 23a, the return duct 24, the first cool air inlet 10, the cool air inlet 15, and the evaporator 6. And form a leading cycle.

Next, the defrosting operation will be described. In the defrosting operation, after a fixed time operation by the defrost timer 29, the contact of the defrost timer 29 is reversed (connected to A and C), so that the motor 27 of the compressor, the discharge fan 23, and the refrigerating fan 7 are transmitted from the power supply unit 30. It will not be energized, instead
Electric power is supplied to the defrost heater 5a and the duct heater 13 of the evaporator 6 to melt the frost generated on the evaporator 6 and the wall 12 of the first return air inlet 10.

After a certain period of power supply, a contact point of the defrost timer 29 is switched by temperature detection of a sensor (not shown) to form a cycle for returning to the normal cooling operation.

[0017]

However, in the above-described conventional configuration, defrost water generated when defrosting the wall 12 of the first return air inlet 10 accumulates at the junction 25 of the return duct 24, and the next normal cooling is performed. frozen during operation, the frozen water is first retrace <br/> place cold air inlet portion 10, grows in the feedback duct 24, a first feedback cool air introduction part 10 and the feedback duct 24 closes, can not cool the refrigerating compartment 4 There was a problem that.

On the other hand, even if a drain hole is provided at the junction, the cold air in the freezing room 3 enters the first return cold air introducing portion 10 and the strong cold air in the freezing room 3 causes a large amount of frost to grow . There has been a problem that frost grows in the one return cold air introducing portion 10 to cause a cooling failure.

The present invention has been made to solve the conventional problems, and has as its object to provide a refrigerating refrigerator having a stable cooling air environment and good cooling performance.

[0020]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a refrigerator- freezer according to the present invention introduces return cold air from a refrigerator compartment.
Porous material at the junction of the return cold air inlet and the return duct
Is provided. In addition, return to the refrigerator compartment
The return cool air introduction part on the side that introduces return cool air and the return duct
A configuration is provided in which a bottom member made of a shape memory alloy is provided at the junction .

Further, the return side of the refrigerator compartment on the side of introducing cold air is provided.
A return cool air introduction section and a valve member formed of a soft thin film member at a junction of the return duct are provided.

[0022]

According to the present invention, with the above-described structure, the defrosting water at the time of defrosting flows out of the porous member to the freezer compartment side, and the first return cold air
This is to prevent the generation of frozen water in the introduction section and return duct.

[0023] In addition, the opening operation of the bottom member of the shape memory alloy causes the defrosting water at the time of defrosting to flow out to the freezer compartment, and the first return
This prevents freezing water from entering the cool air inlet and the return duct.

Furthermore, the valve member made of a soft thin member, drained defrost water during the defrosting the freezing chamber side, the first null
This is to prevent the generation of frozen water in the return air introduction section and return duct.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. The same components as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0026] 1, 2, 3, 31 is frozen in the porous member simultaneous foaming system formed of urethane foam or the like, the first feedback cool air introduction part 10 and the feedback duct 24, to the bottom of the confluent portion 25 The room 3 is provided at a position with respect to the inside of the refrigerator.

The operation of the refrigerator having the above-described structure will be described below. Refrigerator compartment 4, cold air return port 23a,
The cool air flowing into the return duct 24 is guided to the porous member 31 and flows to the first return cool air introduction unit 10 . At this time, since the porous member 31 has an air resistance due to the porous body, most of the cold air flows in the direction of the first return cold air introduction unit 10 , and further, the humid cold air from the refrigerator compartment 4 is frozen. The strong cold air in the chamber 3 freezes at the porous portion of the porous member 31, and the cold air does not flow toward the freezing chamber 3.

On the other hand, when defrosting, the duct heater 13 provided on the wall 12 is energized to melt the frost, and the defrost water formed by melting the frost flows out to the porous member 31. At that time, since the duct heater 13 is energized, the temperature of the porous member 31 is also 0 ° C. or higher, so that the water in the porous member flows out to the freezing compartment 3 at the same time.

According to the present embodiment as described above, the porous member 31 and the first feedback cool air introduction part 10, since the configuration provided to the confluence section 25 of the feedback duct 24, the defrosted water is frozen
The one return cold air introduction part 10 and the return duct 24 are blocked, and there is no possibility of cooling failure.

Next, a second embodiment will be described with reference to FIGS.
This will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

[0031] 32 is a bottom member made with L-shaped to bend the shape memory alloy in the following certain temperature, the first feedback cold air inlet
It is fixed to the bottom part 33 and the wall part 12 so as to seal the confluence part 25 of the part 10 and the return duct 24, and is provided in a place located in the refrigerator of the freezing room 3.

The operation of the refrigerator having the above-described structure will be described below. Refrigerator compartment 4, cold air return port 23a,
During the normal cooling operation, the cool air flowing into the return duct 24 is bent in an L-shape and is sealed with the freezing room 3 at the junction 25, so that the cool air flows toward the first return cool air inlet 10 . Flows. On the other hand, at the time of defrosting, the duct heater 13 provided on the wall 12 is energized to melt the frost, and the defrost water generated by melting the frost flows to the bottom member 32 of the bottom 33. At that time, since the temperature of the bottom member 32 also rises and is equal to or higher than a certain temperature, the L-shaped bottom member 32 becomes I-shaped, and the defrost water flows out of the bottom member 32 into the freezing compartment 3. . At the end of the defrosting, the power supply to the duct heater 13 is stopped.
The bottom member 32 is cooled by the cool air in the freezer compartment 3, bent into an L-shape, and the junction 25 is closed.

As described above, according to the present embodiment, the bottom member 32 made of a shape memory alloy is provided at the junction 25 between the first return cold air inlet 10 and the return duct 24. So
The defrosting water does not freeze and closes the first return cold air introduction section 10 and the return duct 24, and does not cause cooling failure.

Next, a third embodiment will be described with reference to FIGS.
This will be described with reference to FIG. The same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.

Numeral 34 denotes a valve member made of a soft thin film member. An opening 36 is provided in the bottom member 35 of the junction 25, and an end 37 is fixedly provided on the freezing side 3 so as to close the opening 36. Have been.

The operation of the refrigerator having the above-described structure will be described below. Refrigerator room 4, cold air return port 23
a, the cold air flowing into the return duct 24 is on the suction side of the refrigerating fan 9 and generates a negative pressure, so that the valve member 34 is sealed in a direction to be sealed in the direction of the opening 36. On the other hand, at the time of defrosting, the refrigeration fan 9 is stopped and the duct heater 13 is energized, so that the frost is melted, and the defrost water flows in the direction of the valve member 34. The valve member 34 made of a member opens, and flows to the defrost water freezer compartment side. After the defrosting is completed, the defrosted water has flowed out, so the valve member 34 generates a negative pressure due to the re-operation of the refrigerating fan 9 and can shut off the cool air, and the defrosted water is frozen .
No cooling failure occurs due to freezing of the defrost water into the return cold air introduction part 10 and the return duct 24.

[0037]

As described above, according to the present invention, the first return cold air
Because it is provided with a porous member to the junction portion between the inlet portion feedback duct configuration, the defrost water produced by the first feedback cool air introducing section is, first feedback cool air introduction part, remains in the feedback duct, frozen No cooling failure occurs.

In the present invention, since the bottom member made of the shape memory alloy is provided at the junction of the first return cold air introducing portion and the return duct, the defrost water flows out to the freezer compartment without fail. Therefore, there is no possibility of remaining in the first return cold air introduction portion and the return duct and freezing and causing cooling failure.

Further, since the present invention has a structure in which a valve member made of a soft thin film member is provided at the junction of the first return cold air introducing portion and the return duct, the defrost water generated in the cool air introducing stage and the inside is provided. However, it does not remain in the first return cold air introducing portion and the return duct, and does not freeze and cause poor cooling.

[Brief description of the drawings]

FIG. 1 is a sectional view of a refrigerator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the first embodiment in FIG. 1;

FIG. 3 is a sectional view taken along line CC of the first embodiment of FIG. 1;

FIG. 4 is a sectional view showing a second embodiment corresponding to FIG. 2;

FIG. 5 is a sectional view showing a second embodiment corresponding to FIG. 3;

FIG. 6 is a sectional view corresponding to FIG. 5 at the time of defrosting of the second embodiment.

FIG. 7 is a sectional view showing a third embodiment corresponding to FIG. 2;

FIG. 8 is a sectional view showing a third embodiment corresponding to FIG. 3;

FIG. 9 is a sectional view corresponding to FIG. 7 at the time of defrosting of the third embodiment.

FIG. 10 is a cutaway view of a conventional refrigerator-freezer.

FIG. 11 is a sectional view of a conventional refrigerator-freezer.

FIG. 12 is a sectional view taken along line BB of FIG. 11;

FIG. 13 is an electric circuit diagram of a conventional refrigerator-freezer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body 2 Partition wall 3 Freezer room 4 Refrigerating room 5 Cooling unit 5a Defrost heater 6 Evaporator 7 Freezing fan 8 Cooling cover 9 Partition plate 10 First return cold air introduction part 11 Second return cool air introduction part 12 Wall part 13 Duct heater 13a Lower bottom part of evaporator 14 Cold air outlet 15 Cold air inlet 16 Cold air partition 17 Machine room 18 Condenser 19 Compressor 20 Cold air inlet 21 Outlet 22 Suction duct 23 Exhaust fan 23a Cold air return port 24 Return duct 25 Merge part Reference Signs List 26 Refrigeration thermostat 27 Compressor motor 28 Refrigeration thermostat 29 Defrost timer 30 Power supply unit 31 Porous member 32, 35 Bottom member 33 Bottom 34 Soft thin film member 36 Opening 37 End

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-274369 (JP, A) JP-A-63-129285 (JP, A) JP-A-63-129284 (JP, A) (58) Investigation Field (Int.Cl. ⁷ , DB name) F25D 17/08 304 F25D 21/04 F25D 21/14 F25D 19/02

Claims (3)

(57) [Claims] (1) Filling and forming a heat insulating material between an outer box and an inner box;
The front opening as well as closing in the insulating door, a partition wall for partitioning the inside the refrigerator to the left and right two chambers of the freezing chamber and the refrigerating chamber, a phase to the partition wall
Wherein an installation the evaporator concave inner provided on the upper side surface of the freezing chamber, a cooling unit chamber provided with a freezing fan, a freezing chamber box inside the cooling unit chamber, cool air discharge at the top against
A cool air suction port is formed in the mouth and the lower part, and the inner box and the cooling cover are connected at a lower part of the cool air suction port.
And the return cold air introduction section, which is configured between the first return and the return cold air of the refrigerator compartment
Introducing the second return cold air through the cool air inlet and the return cold air in the freezer compartment
Consists of a partition plate is separated into a section, wherein the freezing chamber and before the freezing chamber side opening in the lower portion of the partition wall
A cold air inlet communicating with the refrigerating compartment, and an outlet communicating the freezing compartment and the refrigerating compartment on the refrigerating compartment side of the partition wall,
A suction duct communicating the cold air inlet and the outlet, and a discharge fan disposed in the suction duct, for introducing cool air in the freezer compartment and discharging the cold air into the refrigerator compartment are provided on a partition wall.
Provided, the refrigerating compartment and the refrigerating compartment on the side for introducing return cold air.
A feedback duct which communicates the feedback cold air inlet portion is provided, the feedback cold air inlet portion on the side of introducing the feedback cold air of the cooling chamber
A refrigerator comprising a porous member provided at a lower portion and a junction of the return duct. 2. An insulating material is filled and formed between the outer box and the inner box.
The front opening is closed with an insulated door, and the interior of the refrigerator is
And a partition wall that divides the refrigerator compartment into two
The steam installed in the recess provided on the upper side of the freezer compartment
A cooling unit chamber provided with a generator and a refrigeration fan, and cool air discharged upward inside the freezer compartment of the cooling unit room.
A cool air suction port is formed in the mouth and the lower part, and the inner box and the cooling cover are connected at a lower part of the cool air suction port.
A feedback cold air inlet portion configured between this feedback cool air introduction part first feedback through a feedback cool air of the refrigerating compartment
Introducing the second return cold air through the cool air inlet and the return cold air in the freezer compartment
Consists of a partition plate is separated into a section, wherein the freezing chamber and before the freezing chamber side opening in the lower portion of the partition wall
A cold air inlet for communicating with the refrigerator compartment;
A discharge port communicating the freezer compartment and the refrigerator compartment on the storage compartment side,
A suction duct communicating the cold air inlet and the outlet.
And disposed in the suction duct to guide cool air in the freezing room.
And a discharge fan for discharging into the refrigerator compartment on the partition wall.
Provided, the refrigerating compartment and the refrigerating compartment on the side for introducing return cold air.
A return duct is provided to communicate with the return cool air inlet, and the return cool air inlet on the side of the refrigerator compartment on the side of introducing the return cool air is provided.
A refrigerator-freezer comprising a bottom member made of a shape memory alloy at a lower portion and a junction of the return duct. 3. An insulating material is filled and formed between the outer box and the inner box.
The front opening is closed with an insulated door, and the interior of the refrigerator is
And a partition wall that divides the refrigerator compartment into two
The steam installed in the recess provided on the upper side of the freezer compartment
A cooling unit chamber provided with a generator and a refrigeration fan, and cool air discharged upward inside the freezer compartment of the cooling unit room.
A cool air suction port is formed in the mouth and the lower part, and the inner box and the cooling cover are connected at a lower part of the cool air suction port.
And the return cold air introduction section, which is configured between the first return and the return cold air of the refrigerator compartment
Introducing the second return cold air through the cool air inlet and the return cold air in the freezer compartment
Consists of a partition plate is separated into a section, wherein the freezing chamber and before the freezing chamber side opening in the lower portion of the partition wall
A cold air inlet for communicating with the refrigerator compartment;
A discharge port communicating the freezer compartment and the refrigerator compartment on the storage compartment side,
A suction duct communicating the cold air inlet and the outlet.
And disposed in the suction duct to guide cool air in the freezing room.
And a discharge fan for discharging into the refrigerator compartment on the partition wall.
Provided, the refrigerating compartment and the refrigerating compartment on the side for introducing return cold air.
A return duct is provided to communicate with the return cool air inlet, and the return cool air inlet on the side of the refrigerator compartment on the side of introducing the return cool air is provided.
A refrigerator comprising: a valve member formed of a soft thin film member at a junction between a lower portion and the return duct.