JP6895605B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator provided with a damper for controlling the amount of cold air into each storage chamber.

In recent years, refrigerators generate cold air in the cooling chamber on the back of the refrigerator body and circulate the cold air to the refrigerator compartment, freezer compartment, vegetable compartment, etc. by a cooling fan to cool the food in each chamber. In addition to being equipped with a refrigerator compartment damper that adjusts the amount of cold air circulating to the refrigerator, there is also a refrigerator compartment damper that controls the amount of cold air circulation to the freezer compartment so that the refrigerator compartment and the freezer compartment can be cooled efficiently ( For example, see Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-7452

However, in the above-mentioned conventional refrigerator, the cold air generated by the cooler during the operation of the compressor is supplied to the refrigerator compartment and the freezer compartment by the blower through the refrigerator compartment damper and the freezer compartment damper, and is cooled to a predetermined temperature. After the compressor is stopped, the blower is also stopped, and when the temperature in the freezer chamber rises, the compressor is operated again, repeating the cycle.

However, since the blower is also stopped while the compressor is stopped, the cold heat of the cooler cannot be effectively used while the compressor is stopped, and there is a problem that the cooling efficiency is lowered.

The present invention solves the above-mentioned conventional problems, and provides a refrigerator capable of effectively cooling the refrigerating room by effectively utilizing the cold heat of the cooler while the compressor is stopped and suppressing the heat effect on the freezing room. With the goal.

In order to solve the above-mentioned conventional problems, the refrigerator of the present invention includes a refrigerator and a freezer, and a cooler and a blower which are arranged behind the refrigerator and supply cold air to the refrigerator and the freezer. A cooling chamber in which the cooling chamber is stored, a refrigerating chamber damper that controls the cold air supplied from the cooling chamber to the refrigerating chamber based on a refrigerating chamber temperature sensor, and a refrigerating chamber that controls the cold air supplied from the cooling chamber to the refrigerating chamber. A freezer compartment damper that controls based on a temperature sensor and a compressor whose operation is controlled based on the freezer compartment temperature sensor are provided, and the refrigerating chamber temperature sensor reaches an OFF temperature at which the refrigerating chamber damper is opened. ago, and the case where the compressor refrigerating compartment temperature sensor is the freezing chamber damper reaches the OFF temperature of the closed stops, a predetermined time after the compressor stops, the refrigerating compartment damper by the freezer compartment damper closed If the refrigerator is closed when the compressor is stopped by operating the blower in the open state, the refrigerator damper is still closed even after the compressor is stopped. The refrigerating chamber is not cooled .

As a result, the cold heat of the cooler can be effectively used while the compressor is stopped, the heat effect on the freezer chamber can be suppressed, and the refrigerator compartment can be cooled efficiently.

In the refrigerator of the present invention, when the compressor is stopped with the refrigerator damper open and the freezer compartment damper open, the blower is operated with the refrigerator compartment damper open for a predetermined time after the compressor is stopped. As a result, the cold heat of the cooler can be effectively used while the compressor is stopped, the influence of heat on the freezer chamber can be suppressed, the refrigerating chamber can be efficiently cooled, and a highly energy-saving refrigerator can be provided.

Front view of the refrigerator according to the first embodiment of the present invention Front view showing the inside of the refrigerator Cross section of the refrigerator Explanatory drawing explaining the cold air flow of the refrigerator Front view showing the freezer compartment of the refrigerator Cross-sectional view showing the cooling chamber of the refrigerator Cross-sectional view showing the vegetable compartment duct and the refrigerator compartment return duct of the refrigerator An exploded perspective view showing the cooling chamber portion of the refrigerator. An exploded perspective view of the cooling chamber part of the refrigerator as seen from the cooling chamber side. A perspective view of the cooling chamber as viewed from the cooling chamber side, leaving a part of the cooling chamber forming plate of the refrigerator. Front view showing the relationship between the cooling chamber forming plate of the refrigerator and the vegetable compartment duct as viewed from the freezer compartment side. A perspective view showing the relationship between the cooling chamber forming plate of the refrigerator and the vegetable compartment duct as viewed from the freezer compartment side. Perspective view showing the refrigerator compartment of the refrigerator Cross-sectional view showing the refrigerator compartment of the refrigerator FIG. 14 is a diagram schematically showing a horizontal cross section of a portion A, a portion B, and a portion C. Horizontal cross-sectional view of the refrigerator compartment duct of the refrigerator Explanatory drawing showing the discharge port of the refrigerator compartment duct of the refrigerator Enlarged cross-sectional view of the main part showing the refrigerator compartment of the refrigerator Front view showing the inside of the refrigerator compartment Enlarged front view showing the main parts of the refrigerator compartment An exploded perspective view showing the storage room of the refrigerator A perspective view of the rear part of the partial room in the storage room of the refrigerator as viewed from the back. Enlarged perspective view of the rear part of the partial room in the storage room of the refrigerator as seen from the back. Enlarged perspective view of the rear part of the partial room in the storage room of the refrigerator as seen from the back side toward the front. Enlarged side view showing a deodorizing unit mounting part at the rear part of the partial room in the storage room of the refrigerator. An enlarged perspective view showing a deodorizing unit mounting portion at the rear portion of the partial chamber in the storage chamber of the refrigerator. A perspective view of the cooling chamber from the back with the refrigerator's cooler removed. Front view of the cooling room from the back with the refrigerator cooler removed Front view showing the back plate of the freezer compartment of the refrigerator An exploded perspective view of the cooling chamber components of the refrigerator Perspective view of the cooling room of the refrigerator from the front licking information Enlarged sectional view showing the main part of the cooling chamber of the refrigerator Enlarged sectional view of another example showing the main part of the cooling chamber of the refrigerator. (A) A perspective view showing a freezer damper of the refrigerator, and (b) a cross-sectional view of the freezer damper. Control block diagram of the refrigerator of this embodiment A flowchart showing the basic control of the refrigerator cooling system of the present embodiment. Flow chart of damper opening control of the refrigerator cooling system of this embodiment Flow chart of damper opening control of the refrigerator cooling system of this embodiment Flow chart showing off-cycle control of the refrigerator cooling system of this embodiment Timing chart showing off-cycle control of the refrigerator cooling system of this embodiment Flow chart showing defrost control of the refrigerator cooling system of this embodiment Timing chart showing defrost control of the refrigerator cooling system of this embodiment Flow chart showing control of vegetable room heater by humidity sensor of vegetable room of refrigerator of this embodiment A graph showing the relationship between the outside air temperature and the energization rate of the vegetable room heater by the humidity sensor of the vegetable room of the refrigerator of the present embodiment. A flowchart showing a cooling system control performed based on a detection result of a storage amount in a refrigerating room in the refrigerator of the present embodiment.

The invention according to claim 1 comprises a refrigerating chamber, a freezing chamber, and a cooling chamber arranged behind the refrigerating chamber and accommodating a cooler and a blower for supplying cold air to the refrigerating chamber and the freezing chamber. , The refrigerating chamber damper that controls the cold air supplied from the cooling chamber to the refrigerating chamber based on the refrigerating chamber temperature sensor, and the cold air supplied from the cooling chamber to the refrigerating chamber are controlled based on the refrigerating chamber temperature sensor. A freezer compartment damper and a compressor whose operation is controlled based on the freezer compartment temperature sensor are provided , and before the refrigerating chamber temperature sensor reaches the OFF temperature at which the refrigerating chamber damper is opened, and the freezer compartment is provided. When the temperature sensor reaches the OFF temperature at which the freezer damper is closed and the compressor is stopped, the refrigerator is opened and the blower is opened for a predetermined time after the compressor is stopped. If the refrigerating chamber damper is closed when the compressor is stopped by operating to cool the refrigerating chamber, the refrigerating chamber damper remains closed even after the compressor is stopped, and the refrigerating chamber is closed. are those without cooling, by effectively utilizing the cold of the cooler in the compressor is stopped, cutting the refrigerating compartment to a target temperature by reducing the temperature fluctuations of the refrigeration compartment by efficiently cooled.

The invention according to claim 2 is the invention according to claim 1 , wherein the refrigerating chamber damper changes the flap angle of the refrigerating chamber damper based on the detection temperature of the refrigerating chamber temperature sensor and the refrigerating chamber target temperature. The flap opening is controlled , and the refrigerator compartment can be cooled efficiently.

The invention according to claim 3 is the rotation speed of the blower according to the invention according to claim 1 or 2, which operates the refrigerator compartment damper in the open state with the freezer compartment damper closed for a predetermined time after the compressor is stopped. Is smaller than the number of revolutions during the operation of the compressor, and the cold heat of the cooler can be further effectively used while the compressor is stopped, the influence of heat on the freezer chamber is suppressed, and the refrigerator compartment is efficiently cooled. It is possible to provide a highly energy-saving refrigerator.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
1 to 4 are diagrams for explaining the overall configuration of the refrigerator, FIGS. 5 to 12 are diagrams for explaining the cold air supply configuration from the cooling chamber to the vegetable chamber, and FIGS. 13 to 26 are diagrams for explaining the refrigerator compartment configuration. 27 to 34 are views for explaining the configuration of the portion extending from the freezer compartment to the cooling chamber.

<1-1. Overall configuration of refrigerator>
First, the overall configuration of the refrigerator will be described with reference to FIGS. 1 to 4.

In FIGS. 1 to 4, the refrigerator according to the present embodiment includes a refrigerator main body 1 having an open front, and the refrigerator main body 1 includes a metal outer box 2, a hard resin inner box 3, and the outer box. It is composed of a foamed heat insulating material 4 which is foam-filled between the box 2 and the inner box 3, and a plurality of storage chambers are formed by partitions such as partition plates 5 and 6. Further, each storage chamber of the refrigerator main body 1 is openable and closable by a rotary door 7 or a drawer type door 8, 9, 10 and 11 which adopts the same heat insulating structure as the refrigerator main body 1.

The storage chambers formed in the refrigerator main body 1 include a refrigerating chamber 14 at the top, a temperature zone switchable switching chamber 15 provided under the refrigerating chamber 14, and an ice making chamber 16 provided next to the switching chamber 15. It is composed of a switching chamber 15, an ice making chamber 16, and a freezing chamber 18 provided between the vegetable compartment 17 at the bottom. A plurality of shelves 20 are provided in the refrigerating chamber 14, and a partial chamber 21 and a chilled chamber 22 having different cooling temperature zones are provided in two upper and lower stages below the shelf plate 20.

The refrigerating chamber 14 is a storage chamber for refrigerating and storing, and is cooled by setting it to a temperature as low as not to freeze, specifically, usually 1 to 5 ° C. Further, the partial chamber 21 provided in the refrigerator chamber is set to -2 to -3 ° C, which is suitable for slight cryopreservation, and the chilled chamber 22 has a temperature of about 1 ° C, which is lower than that of the refrigerator chamber 14 and higher than that of the partial chamber 21. Set and cooled.

The vegetable compartment 17 is a storage chamber whose temperature is set to be equal to or slightly higher than that of the refrigerator compartment 14, and specifically, the temperature is set to 2 to 7 ° C. for cooling. Since the vegetable compartment 17 becomes highly humid due to the moisture emitted from the stored food such as vegetables, dew condensation may occur if it is locally cooled too much. Therefore, by setting the temperature to a relatively high temperature, the amount of cooling is reduced and the occurrence of dew condensation due to local overcooling is suppressed.

The freezing chamber 18 is a storage chamber set in a freezing temperature zone, and specifically, it is usually set to 22 to -18 ° C. and cooled. It may be cooled by setting it to a low temperature such as ° C.

The switching chamber 15 is a storage chamber in which the temperature inside the refrigerator can be changed, and can be switched from the refrigerating temperature zone to the freezing temperature zone according to the application.

On the other hand, a cooling chamber 23 is provided on the back surface of the freezing chamber 18, and the cooling chamber 23 is provided with a cooler 24 for generating cold air and a cooling fan 25 for supplying cold air to each of the chambers. .. Further below the cooler 24, a defrosting means 26 (hereinafter, referred to as a glass tube heater) composed of a glass tube heater or the like is provided.

The cooler 24 constitutes a refrigerating cycle by connecting a compressor 27, a condenser (not shown), a heat radiating pipe for heat dissipation (not shown), and a capillary tube (not shown) in an annular shape. Cooling is performed by circulating the refrigerant compressed by the compressor 27.

Further, the cooling fan 25 is provided above the cooler 24, and the refrigerating room 14, the freezing room 18, the vegetable room 17, etc. are provided via the refrigerating room duct 28, the freezing room duct 29, and the vegetable room duct 30 connected to the downstream side thereof. It is designed to supply cold air to each of these chambers.

Hereinafter, each of the cooling chamber 23, the refrigerating chamber 14, the freezing chamber 18, the vegetable compartment 17, and the cooling configuration thereof will be described.

<1-2. Cooling chamber and cold air supply configuration>
The cooling chamber and the cold air supply configuration will be described with reference to FIGS. 3 and 5 to 12.

The cooling chamber 23 is located on the back surface of the freezing chamber 18 and is formed by a cooling chamber forming plate 31 and an inner box 3 as shown in FIG. 6, and is cooled by mounting a cooling fan 25 on the upper part of the cooling chamber forming plate 31. The cooling fan 25 is located above the vessel 24. Further, a freezing chamber back plate 32 is attached to the front side of the cooling chamber forming plate 31 to cover the downstream side of the cooling fan 25 and form a freezing chamber duct 29 communicating with the cooling chamber downstream side from the cooling chamber 23. ing.

Then, on the downstream side of the cooling fan 25, the refrigerating chamber duct 28 of the refrigerating chamber 14 and the vegetable compartment 1
The vegetable compartment ducts 30 of No. 7 are connected separately and independently at different positions. More specifically, the upper surface of the upper part on the downstream side of the cooling fan is connected to the refrigerating chamber duct 28 via the first cold air supply port 33 provided in the partition plate 5 that separates the refrigerating chamber 14 and the freezing chamber 18 as shown in FIG. As shown in FIGS. 10, 11, and 12, a second cold air supply port 34 is provided on the upper side of the downstream side of the cooling fan, and the vegetable compartment duct 30 is connected. That is, the refrigerating chamber duct 28 and the vegetable compartment duct 30 are connected to the cooling chamber 23 separately and independently at different positions. Then, the cold air generated by the cooler 24 is supplied separately to the first cold air supply port 33 and the second cold air supply port 34 by the cooling fan 25, and is supplied to the refrigerating room duct 28 and the vegetable room duct 30. To do.

As shown in FIG. 6, a heater cover 35 having an umbrella-shaped cross section covering the cooler 24 glass tube heater 26 is installed below the cooler 24, and defrost water is externally provided on the bottom surface of the cooling chamber 23. A drainage port 36 for discharging water is provided.

<1-3. Refrigerator room and its cooling configuration>
Next, the refrigerating chamber and its cooling configuration will be described with reference to FIGS. 3 and 13 to 26.

The refrigerating chamber 14 is located at the uppermost part of the refrigerator main body 1, has a plurality of shelf boards 20 as shown in FIGS. 3 and 14, and is provided with the refrigerating chamber duct 28 described above on the back surface.

As shown in FIG. 21, the refrigerating chamber duct 28 is configured by covering the surface of the duct member 28a made of styrofoam on the refrigerating chamber side with a resin duct cover 28b, and partitions between the refrigerating chamber 14 and the freezing chamber 18. It is mounted on the back surface of the refrigerating chamber so as to cover the first cold air supply port 33 of the plate 5 and communicates with the cooling chamber 23. A refrigerating chamber damper 37 is incorporated in the first cold air supply port 33, and the amount of cold air supplied from the cooling chamber 23 to the refrigerating chamber 14 is controlled by opening and closing the refrigerating chamber damper 37. The refrigerating chamber damper 37 is fixed to the first cold air supply port 33 by the damper fixing frame 38.

The refrigerating chamber damper 37 is composed of a double damper having a refrigerating chamber damper section 39 for controlling the amount of cold air supplied to the refrigerating chamber 14 and a partial chamber damper section 40 for controlling the amount of cold air supplied to the partial chamber 21. It is configured to be driven by one motor (not shown) for refrigeration and partial in the refrigerating damper drive motor unit 41.

On the other hand, of the partial chamber 21 and the chilled chamber 22 provided in the lower part of the refrigerating chamber 14, the chilled chamber 22 located above is the ceiling plate 43 serving as the lowermost shelf plate as shown in FIGS. 14 and 18. The refrigerating chamber is formed to fill the width of the refrigerating chamber between the partial chamber 21 located below the partial chamber 21, and the chilled chamber container 44 is provided so as to be freely taken in and out. Behind the chilled chamber 22, a cold air inlet 22a communicating with the downstream side of the refrigerator damper portion 39 of the refrigerating chamber duct 28 is provided, and cold air is taken in from the cold air inlet 22a to be cooled. ..

As shown in FIG. 18, the chilled chamber 22 is provided with a slit-shaped cold air return port (chilled side) 45 at the rear portion of the ceiling plate 43, and the cold air return port (chilled side) 45 is provided at the rear portion of the chilled chamber container 44. A cold air return passage portion (chilled side) 46 connected to the refrigerating chamber 14 via the refrigerator is provided. Further, as shown in FIG. 14, an opening 48 connected to the inside of the refrigerating chamber 14 is provided between the front end portion of the chilled chamber container 44 and the lower part of the chilled chamber door / handle portion 47, and the cold air in the refrigerating chamber 14 is provided. Is configured to flow to the cold air return passage portion (chilled side) 46 through a gap (not shown) on the outer periphery of the chilled chamber container 44 together with the cold air after cooling the chilled chamber overflowing from the chilled chamber container 44. ..

Further, in the chilled chamber 22, a temperature control heater 49 is laid on the ceiling plate member 50 of the partial chamber 21 below the chilled chamber container 44, and the temperature of the chilled chamber is set by cold radiation from the partial chamber 21 located below. When the temperature becomes lower than the temperature, the temperature control heater 49 is energized to maintain the set temperature. The temperature control heater 49 is controlled by a chilled chamber temperature sensor (not shown) provided at an appropriate position in the chilled chamber 22.

On the other hand, in the partial chamber 21 located below the chilled chamber 22, water is stored by the inner wall surface of the inner box of the refrigerator main body 1, the water storage tank chamber forming plate (not shown), and the ceiling plate member 50 which is also the bottom surface of the chilled chamber 22. A section is formed on the side of the tank chamber, and the front opening portion can be opened and closed by the partial chamber door 51. A partial chamber container 52 is provided inside the partial chamber 21 so that it can be freely taken in and out.

A heat insulating material 53 made of styrofoam or the like is incorporated in the ceiling plate member 50 constituting the partial chamber 21, and the partial cold air communicating with the heat insulating material 53 on the downstream side of the damper portion 40 for the partial chamber of the refrigerating chamber duct 28 described above. A passage 54 is formed to supply cold air into the partial chamber 21 for cooling.

Further, as shown in FIGS. 18 and 22 to 24, the partial chamber 21 is provided with a slit-shaped cold air return port (partial side) 55 at the rear portion of the ceiling plate member 50, and is provided with a slit-shaped cold air return port (partial side) 55, similarly to the chilled chamber 22. A space is provided behind the partial chamber container 52 to form a cold air return passage portion (partial side) 56, and a cold air return passage portion (chilled side) 46 behind the chilled chamber 22 is provided with cold air and a chilled chamber. The cold air flows to the cold air return passage portion (partial side) 56.

Further, the partial chamber 21 is provided with a cold air confluence return port 57 communicating with the cold air return passage portion (partial side) 56 at the rear portion of the partition plate 5 which is also the bottom surface thereof, and the refrigerating chamber return duct 58 is provided at the cold air confluence return port 57. Is connected so that the cold air that has cooled the refrigerating chamber 14 and the chilled chamber 22 merges with the partial chamber cooling air that overflows from the partial chamber container 52 and returns to the cooling chamber 23.

That is, the duct portion for returning the cold air of the refrigerating chamber 14, the chilled chamber 22, and the partial chamber 21 to the cooling chamber 23 is formed by utilizing the rear space of the chilled chamber 22 and the partial chamber 21.

The cold air return port (chilled side) 45 and the cold air return port (partial side) 55 are provided at positions facing each other vertically, and the cold air return port (partial side) 55 and the cold air confluence return port 57 are located at misaligned positions. It is provided.

Further, the refrigerating chamber return duct 58 for returning the cold air to the cooling chamber 23 is installed on the side (horizontal) of the cooling chamber 23 as shown in FIGS. 4, 27, 28, etc., and the lower end side thereof is the cooling chamber. It is configured to return to the cooling chamber 23 by opening the lower side surface of the 23. In the refrigerating chamber return duct 58, the concave groove 58b provided on the rear surface is pressed against the inner wall surface of the back surface of the inner box 3 to form a duct passage portion with the inner surface of the back wall.

Furthermore, in the partial chamber 21, the portion between the cold air return port (partial side) 55 and the cold air confluence return port 57 of the cold air return passage portion (partial side) 56, as shown in FIGS. 19 and 20. A refrigerating room temperature sensor 59 is provided to detect the temperature of the refrigerating room 14 and control the damper unit 39 for the refrigerating room. A partial chamber temperature sensor 60 that detects the temperature of the partial chamber 21 and controls the partial chamber damper portion 40 is provided on the diagonal portion on the opposite side of the refrigerating chamber temperature sensor 59 and the refrigerating chamber duct 28. ..

Further, as shown in FIGS. 25 and 26, the deodorizing unit 61 is located between the cold air return port (partial side) 55 of the cold air return passage portion (partial side) 56 and the cold air confluence return port 57 so as to follow the flow of cold air. Is detachably provided.

The deodorizing unit 61, the refrigerating chamber temperature sensor 59, and the partial chamber temperature sensor 60 are all mounted portions 28bb (refrigerating chamber temperature sensor 59 and partial) provided in a part of the duct cover 28b constituting the refrigerating chamber return duct 58. The mounting portion for the room temperature sensor 60 is not shown) and is integrated.

Further, FIG. 15 shows a horizontal cross-sectional view of part A (refrigerator room damper), a horizontal cross-sectional view of part B (rear part of the partial room), and a horizontal section C (refrigerator room duct) in the refrigerating room duct 28 of FIG. It is a schematic view of a cross section.

In FIG. 15, the W / D (hereinafter referred to as the aspect ratio) represented by the ratio of the long side W and the short side D of the duct member 28a in the refrigerating chamber duct 28 is the aspect ratio of part A (= W1 / D1). Assuming that the aspect ratio of the B part (= W2 / D2) and the aspect ratio of the C part (= W3 / D3), there is a relationship of the aspect ratio of the A part <the aspect ratio of the B part <the aspect ratio of the C part.

Further, FIG. 16 is a horizontal cross-sectional view of the refrigerating chamber duct 28, and FIG. 17 is an explanatory view showing a discharge port of the refrigerating chamber duct 28.

In FIGS. 16 and 17, extension ribs 28c extending left and right and integrally formed are provided on both left and right sides of the duct cover 28b covering the surface of the duct member 28a on the refrigerating chamber side.

The extending rib 28c is provided with an inclined surface that is inclined toward the back surface side, and the end portion is further increased in angle and extends toward the back surface side. The extension rib 28c extends to the extent that the side discharge port 28d cannot be directly seen when the user views the refrigerator compartment from the front.

Further, the lower surface of the side discharge port 28d has an inclined surface that is upward with respect to the flow of cold air.

Further, a recess is provided in the side wall of the inner box 3 in front of each shelf plate 20 in the refrigerating chamber 14, and the LED lighting 80 which is an illumination in the recess and the refrigerating which detects the illuminance of the light from the LED lighting 80 when the door is closed. A substrate provided with a room light sensor 81 is embedded, and a transparent lighting cover covering the recess is provided.

Then, the cooling system of the refrigerator is controlled based on the detection result of the refrigerating room light sensor 81 that detects the illuminance of the light from the LED when the door is closed. Details will be described later.

<1-4. Freezer and its cooling configuration>
Next, the freezer chamber and its cooling configuration will be described with reference to FIGS. 2, 3 and 24 to 31.

The freezing chamber 18 is located below the refrigerating chamber 14 and in front of the cooling chamber 23, and the freezing chamber container 62 composed of the lower container 62a and the upper container 62b placed above the lower container 62a is opened and closed by the drawer of the door 11. It is provided so that it can be taken in and out freely. Then, as described above, the freezing chamber back plate 32 is arranged between the cooling chamber 23 and the freezing chamber back plate 32 and the cooling chamber forming plate 31 communicate with the cooling fan downstream side of the cooling chamber 23. It forms a chamber duct 29.

As shown in FIG. 24 and the like, the freezing chamber back plate 32 is provided with cold air outlets 63 in a plurality of upper and lower stages, and the uppermost cold air outlet 63 supplies cold air to the ice making chamber 16 and the switching chamber 15. The cold air outlet 63 in the middle stage supplies cold air to the upper container 62b of the freezer container 62, and the cold air outlet 63 in the lowermost stage supplies cold air to the lower container 62a.

Further, as shown in FIG. 24 and the like, the freezing chamber 18 is provided with a freezing cold air return port 64 communicating with the lower part of the cooling chamber 23 at the lower part of the freezing chamber back plate 32. As shown in FIG. 29, the refrigerating / cold air return port 64 is composed of a freezing chamber side opening frame portion 65 and a cooling chamber side opening frame portion 66, and these frames are rearward toward the upper part with respect to the vertical line, that is, the cooling chamber. It is tilted so that it is located on the 23rd side. A grill 67 is attached to the freezing chamber side opening frame portion 65 of the freezing cold air return port 64, and a freezing chamber damper 68 is provided in the cooling chamber side opening frame portion 66.

The grill 67 provided in the freezing chamber side mouth frame portion 65 rectifies the cold air flowing from the freezing chamber 18 to the cooling chamber 23, and each grill piece 69 is inclined so that the cooling chamber side end is located upward. The shape is formed along the rear surface of the freezer container 62 in the freezer 18 so that the front and rear lengths become longer toward the lower grill piece 69.

On the other hand, the freezer damper 68 provided in the cooling chamber side mouth frame 66 controls the opening and closing of the cold air supplied to the freezer 18, and as shown in FIG. 31, a heat-resistant resin, for example, a polyphenylene sulfide resin (PPS resin). ) Is provided with a plurality of flaps 71 formed of the same heat-resistant resin, and in this example, three flaps 71. The freezer damper 68 is configured to pivotally support the cooling chamber side ends of each of the plurality of flaps 71 and open to the cooling chamber 23 side opposite to the freezing chamber 18 as shown in FIG. 29. It is configured to be driven by a refrigerating damper driving motor unit 72 fixed to one end of the damper frame 70. In FIG. 31, the plurality of flaps 71 indicate when the solid line drawing numbering line is closed and when the broken line drawing numbering line is opened.

Further, as shown in FIG. 25, the refrigerating chamber damper 68 has a damper frame 70 in a state where the refrigerating damper driving motor unit 72 is fixed to a claw piece 73 provided in the cooling chamber side opening frame portion 66. As a result, it is mounted on the cooling chamber forming plate 31 to form a unit, and is provided so as to be inclined so that the cooling chamber side of the refrigerating chamber damper 37 is located below the freezing chamber side along the inclination of the cooling chamber side mouth frame portion 66. is there.

Further, as can be understood from FIG. 29, the freezer damper 68 is provided so that the cold air flowing to the cooling chamber 23 along each of the plurality of flaps 71 flows to the lower end edge of the cooler 24. In this example, the upper portion (upper piece portion of the damper frame 70) of the freezer damper 68 is located above the lower end edge of the cooler 24, and the lower portion (lower side portion of the damper frame 70) is the cooler 24. Cold air is allowed to flow to a portion below the lower end edge of the cooler 24 by being provided so as to be located below the lower end of the refrigerator 24.

Furthermore, the freezer compartment damper 68 is provided so that its lower portion (lower side portion of the damper frame 70) is located above the glass tube heater 26, so that the warm and cold air heated by the glass tube heater 26 at the time of defrosting is ensured. It is set to touch.

On the other hand, the lower side 66a of the cooling chamber side mouth frame 66 supporting the freezer damper 68 is a double wall, and the lower surface thereof is formed into an arc shape and protrudes into the cooling chamber 23 (from the bottom surface 23a of the cooling chamber 23). The shape is such that it protrudes toward the glass tube heater 26) to prevent the radiant heat from the glass tube heater 26 from being directly irradiated, and the gap portion 66b of the double wall portion is opened facing the freezing chamber 18. It is configured to prevent excessive temperature rise by cooling with cold air in the freezer.

Furthermore, as shown in FIG. 25, the freezing chamber damper 68 is outside the heater portion 26a so that the refrigerating damper driving motor unit 72 does not face the heater portion 26a of the glass tube heater 26 in the longitudinal direction of the glass tube heater 26. It is arranged so that it is located in a place shifted to the side. In this example, the refrigerating damper drive motor unit 72 is located on the refrigerating chamber return duct 58 side next to the cooling chamber 23, so that the refrigerating damper driving motor unit 72 is located outside the heater portion 26a. At the same time, the plurality of flaps 71 portions of the freezer damper 68 are located closer to the center line of the cooler 24.

The freezing chamber damper 68 is provided only in the freezing cold air return port 64, and the cold air discharge passage from the cooling chamber 23 to the cold air outlet 63 is not provided with a damper, and the cooling chamber 23 and the freezing chamber 18 communicate with each other. It is kept in.

<1-5. Vegetable room and its cooling configuration>
Next, the vegetable compartment and its cooling configuration will be described with reference to FIGS. 3, 4 and 8 to 12.

As shown in FIG. 3, the vegetable compartment 17 is located at the bottom of the refrigerator body 1 below the freezer compartment 18, and like the freezer compartment 18, the vegetable compartment container 17a is provided so that it can be freely taken in and out by opening and closing the drawer of the door 10. There is. As shown in FIGS. 8 and 9, the vegetable compartment duct 30 for supplying cold air to the vegetable compartment 17 is superposed on the front surface of the refrigerating chamber return duct 58 next to the cooling chamber 23, and the upper portion thereof is arranged in FIG. 4 and FIG. As shown in FIG. 10, it is connected to the second cold air supply port 34 provided in the cooling chamber 23.

As described above, the second cold air supply port 34 is formed separately from the first cold air supply port 33, which is the cold air supply port to the refrigerating chamber 14. That is, the second cold air supply port 34 is below the partition plate 5 that separates the refrigerating chamber 14 and the freezing chamber 18 located above the cooling chamber 23, that is, within the back projection area of the freezing chamber 18, and the cooling fan 25. It is provided on the downstream side of the cooling fan at approximately the same height as the above. The lower end of the vegetable compartment duct 30 connected to the second cold air supply port 34 is open to the upper part of the vegetable compartment 17 to supply cold air to the vegetable compartment 17.

The vegetable compartment duct 30 has an opening 74 at the upper end thereof and is butt-connected to the second cold air supply port 34, and is connected to the second cold air supply port 34 in the vicinity of the connection portion, specifically, in a position range substantially the same as the cooling fan 25. A vegetable compartment damper 75 is incorporated.

Further, as shown in FIG. 8, the vegetable compartment damper 75 is fitted into the concave groove 58b formed in the front surface of the refrigerating chamber return duct 58, which serves as the passage portion of the vegetable compartment duct, and is fitted in the concave groove 58b front surface of the refrigerating chamber return duct 58 in this state. By fitting and mounting the vegetable compartment duct 30, it is sandwiched and fixed between the refrigerating chamber return duct 58 and the vegetable compartment duct 30. The vegetable compartment duct 30 and the refrigerating chamber return duct 58 are made of a material having an elastic force such as foamed styrol, and the elastic force secures the airtightness between the two and at the same time secures the airtightness of the vegetable compartment damper 75. It is a configuration to do.

The vegetable compartment damper 75 is configured such that the damper piece 75a driven by the vegetable damper driving motor unit 76 opens in the direction opposite to the cold air flowing through the vegetable compartment duct 30, in this example, upward. This is the direction opposite to the damper opening direction of the refrigerating chamber duct 28 described above.

Further, the cold air after cooling the vegetable compartment 17 is returned to the cooling chamber 23 via a vegetable compartment return duct (not shown) provided on the ceiling surface thereof.

Further, in the vegetable compartment 17, the vegetable case supported by the door frame fixed to the door 10 of the vegetable compartment and pulled out forward, and the upper vegetables supported by the upper flange on the side surface of the vegetable case so as to cover the upper surface of the vegetable case. It is equipped with a case, and the vegetable case and the upper vegetable case each have a structure with improved sealing properties. As a result, it is possible to suppress the transpiration of water generated from the vegetables, fruits, etc. stored inside, and improve the freshness of the vegetables, fruits, etc.

Further, the vegetable compartment 17 side of the partition plate 6 for insulatingly partitioning the vegetable compartment 17 and the freezing chamber 18 has a recess, and a mist generator is provided inside the recess. The mist generator has a high voltage generating unit and an electrode, and the electrode is supplied with the collected water by dew condensation inside the refrigerator.

Further, the substrate for accommodating the high voltage generating portion is provided with a vegetable room humidity sensor 78 for detecting the humidity in the vegetable room 17.

Further, a vegetable room heater 79 is provided on the vegetable room 17 side of the partition plate 6 that insulates the vegetable room 17 and the freezing room 18, and the humidity is detected by the vegetable room humidity sensor 78 provided on the top surface of the vegetable room 17. The energization of the vegetable compartment heater 79 is controlled accordingly. Details will be described later.

The control flow and operation / effect of the refrigerator configured as described above will be described below using a block diagram and a flowchart.

<2-1. Basic cooling control>
FIG. 35 is a control block diagram of the refrigerator of the present embodiment, and FIG. 36 is a flowchart showing the basic control of the cooling system of the refrigerator of the present embodiment.

In FIG. 35, the input information of the microcomputer 90 that controls the cooling system of the refrigerator is the outside air temperature sensor (ATC) 91, the freezer room temperature sensor (FCC) 92, the refrigerating room temperature sensor (PCC) 59, and the partial room temperature sensor (PFC). ) 60, vegetable room temperature sensor (VCC) 93, cooler temperature sensor (DFC) 94, door open / close detection means 95, external illuminance sensor 96, refrigerating room optical sensor 97, and the output control device of the microcomputer 90 is a compressor. (Comp) 27, Cooling fan (FC fan) 25, Refrigerator room damper (PC damper) 37, Partial room damper (PF damper) 98, Vegetable room damper (VC damper) 75, Freezer room damper (FC damper) 68, Excluded The defrosting means (defrosting heater) 26.

In FIG. 36, when the power is turned on to the refrigerator (S-1), the outside air temperature sensor (ATC) 91, the freezer compartment temperature sensor (FCC) 92, the refrigerator compartment temperature sensor (PCC) 59, and the partial chamber temperature sensor (PFC). 60, based on each temperature information of the vegetable room temperature sensor (VCC) 93, compressor (comp) 27, cooling fan (FC fan) 25, refrigerating room damper (PC damper) 37, partial room damper (PF damper) 98 , Normal temperature control that controls the vegetable compartment damper (VC damper) 75 and the freezer compartment damper (FC damper) 68 is started (S-2).

Then, from the information of the door open / close detection means 95, the external illuminance sensor 96 that detects the brightness around the refrigerator, or the storage amount information by the refrigerator room light sensor 97, the time zone when the refrigerator is used less is predicted to save energy. It is determined whether or not to shift to the mode (S-3).

If the mode does not shift to the energy saving mode, the flaps of each damper perform damper opening / closing control to fully open or fully close (S-7).

When shifting to the energy saving mode, it is determined whether the outside air temperature sensor (ATC) 91 is higher than the predetermined temperature (ATC ≧ T1) (S-4). When the outside air temperature sensor (ATC) 91 is higher than the predetermined temperature, the damper opening degree control for controlling the opening / closing angle of the flaps of the refrigerator compartment damper (PC damper) 37 and the freezer compartment damper (FC damper) 68 is performed (S-5). .. The specific control by the damper opening degree control (S-5) will be described later.

Further, in S-4, when the outside air temperature sensor (ATC) 91 is lower than the predetermined temperature (T1), the refrigerating chamber damper (PC damper) 37 is opened at the initial stage when the compressor (compressor) 27 is stopped.
Off-cycle control for operating the cooling fan (FC fan) 25 is performed (S-6). The specific control in the off-cycle control (S-6) will be described later.

Then, each of the above controls is repeated (S-8) until a defrost signal for starting the defrosting means (defrosting heater) 26 of the cooler 24 is input. When a defrost signal is input, defrost control is performed (S-9). The specific control by the defrost control (S-9) will be described later.

As described above, the refrigerator of the present embodiment is composed of a storage chamber, a cooling chamber 23 in which a cooler 24 for supplying cold air to the storage chamber and a blower (cooling fan 25) are housed, and a cooling chamber 23. A damper for controlling the cold air supplied to the storage chamber in a duct is provided, the damper has a flap and a driving device, and the operation of the flap by the driving device is a flap opening / closing control (S-7). The flap opening control (S-5) is controlled by determining whether or not to shift to the energy saving mode (S-3), and is controlled in each case according to the result. In the energy saving mode, each room is controlled. The flap opening degree control (S-5) of each damper can be performed only when it is desired to reduce the temperature fluctuation.

That is, the technical feature is that the flap opening degree of each damper is not controlled more than necessary, and complicated control such as flap origin position confirmation control necessary for flap opening degree control by a stepping motor of a drive device or the like is performed. It is possible to provide a refrigerator that can be reduced, has simple specifications, enhances energy saving, and can be cooled with high reliability.

In addition, it has energy-saving operation conditions and normal operation conditions, flap opening control is performed under energy-saving operation conditions, flap opening / closing control is performed under normal operation conditions, and each is performed only when energy-saving operation is required. It is possible to provide a refrigerator capable of controlling the flap opening degree of the damper and capable of energy-saving and highly reliable cooling with simple specifications.

<2-2. Damper flap opening control>
37 and 38 are flowcharts showing the details of the damper opening degree control (S-5 of FIG. 36) of the refrigerator cooling system of the present embodiment.

First, the temperature of the refrigerator compartment temperature sensor (PCC) 59 is measured every minute for N minutes (for example, 10 minutes) (S-9). Then, the measurement results for N minutes (for example, 10 minutes) are averaged (S-10). Then, the measured average temperature is compared with the set value of the refrigerating room temperature sensor (PCC) 59 (S-11), and the temperature difference between the average temperature for N minutes and the set value of the refrigerating room temperature sensor (PCC) 59 is ΔT. Is calculated (S-12). Then, the opening degree (angle) of the flap of the refrigerator compartment damper (PC damper) 37 is changed according to the value of the temperature difference ΔT (S-13).

More specifically, as shown in FIG. 38, the set value (target temperature), the upper limit value, and the lower limit value of the refrigerating room temperature sensor (PCC) 59 are confirmed (S-14). The upper limit value and the lower limit value are values of the upper limit and the lower limit of the set value (target temperature) having a range. Next, the average temperature of the refrigerating room temperature sensor (PCC) 59 for the last few minutes (for example, 10 minutes every minute) is confirmed (S-15).

Next, the set value (target temperature) of the refrigerator compartment temperature sensor (PCC) 59 is compared with the average temperature of the last few minutes (for example, 10 minutes every 1 minute), and the temperature difference (ΔT) is confirmed (ΔT). S-16). When the temperature difference (ΔT) is large and the average value is lower than the lower limit of the set value (target temperature), the flap opening (angle) of the refrigerator compartment damper (PC damper) 37 is set to a predetermined angle (driving device). The number of steps of the stepping motor or the like) is reduced (S-17).

Further, in S-16, if the average value is between the upper limit value and the lower limit value of the set value (target temperature), the opening (angle) of the flap of the refrigerator compartment damper (PC damper) 37 is not changed (S-). 18). Further, in S-16, when the temperature difference (ΔT) is large and the average value is higher than the upper limit of the set value (target temperature), the flap opening (angle) of the refrigerator compartment damper (PC damper) 37 is predetermined. Increase the angle (the number of steps of the stepping motor of the drive device) (S-19).

After that, the process returns to S-15, and the above control is repeated every predetermined time (for example, every 10 minutes). That is, the average temperature of the refrigerator compartment temperature sensor (PCC) 59 before a predetermined time (for example, 10 minutes every 1 minute) is compared with the set value (target temperature), and the temperature difference ΔT is adjusted according to the value (level). After that, the opening degree (angle) of the flap of the refrigerating room damper (PC damper) 37 is controlled.

As described above, the refrigerator of the present embodiment has a refrigerating chamber 14, a cooling chamber 23 in which a cooler 24 for supplying cold air to the refrigerating chamber 14 and a blower (cooling fan 25) are housed, and a cooling chamber 23. A refrigerating room damper (PC damper) 37 that controls the cold air supplied from the refrigerator to the refrigerating room 14 in a duct, and a refrigerating room temperature sensor (PCC) 59 that detects the temperature inside the refrigerating room 14 are provided. (PC damper) 37 has a flap and a drive device, and the flap operation by the drive device controls the flap opening degree to control the opening degree of the flap, and the refrigerator compartment damper (PC damper) 37 has a flap operation. Based on the average temperature of the refrigerating room temperature sensor (PCC) 59 and the refrigerating room target temperature during the previous predetermined time, the flap opening is controlled by changing the flap angle by the drive device, so that the inside of the refrigerating room 14 is controlled. It is possible to reduce the temperature fluctuation of the refrigerator and bring it closer to the target temperature of the storage room, and to provide an easy-to-use refrigerator with improved energy saving.

In addition, it has energy-saving operation conditions, and flap opening control is performed under energy-saving operation conditions.Flap opening control of each damper can be performed only when energy-saving operation is required, and energy saving is achieved with simple specifications. And a refrigerator capable of reliable cooling can be provided.

In the present embodiment, the refrigerating room damper (PC damper) that controls the supply of cold air to the refrigerating room has been described, but the same applies to the freezing room damper (FC damper) that controls the supply of cold air to the freezing room. be able to. Further, it can be applied to a switching chamber damper (SC damper) that controls the supply of cold air to the switching chamber and a vegetable compartment damper (VC damper) that controls the supply of cold air to the vegetable chamber.

<2-3. Off-cycle control>
FIG. 39 is a flowchart showing the off-cycle control of the refrigerator cooling system of the present embodiment, and FIG. 40 is a timing chart showing the off-cycle control of the refrigerator cooling system of the present embodiment.

In FIG. 39, when an ON signal is output to the compressor (comp) 27 (S-20), the compressor (comp) 27 and the cooling fan (FC fan) 25 are operated, and at the same time, the freezer damper (FC damper) is operated. ) 68 is opened (S-26), and the cold air generated by the cooler 24 is supplied to the freezer chamber 18, the freezer compartment 18 is cooled, and the refrigerator is arranged in the cold air duct to the refrigerator compartment 14. Cold air is supplied to the chamber damper (PC damper) 37.

Then, in the refrigerating chamber 14, it is determined whether the refrigerating chamber temperature sensor (PCC) 59 is above the OFF temperature (S-21), and if it is below the OFF temperature, the refrigerating chamber damper (PC damper) 37 is closed (S-). 25). In S-21, if the refrigerating room temperature sensor (PCC) 59 is at or above the OFF temperature, the refrigerating room damper (PC damper) 37 is opened (S-22), and then the refrigerating room temperature sensor (PCC) 59 is turned off. Determine if the temperature is reached (S-23).

When the refrigerating room temperature sensor (PCC) 59 reaches the OFF temperature, the refrigerating room damper (PC damper) 37 is closed (S-25), but before the refrigerating room temperature sensor (PCC) 59 reaches the OFF temperature. When the freezer room temperature sensor (FCC) 92 reaches the OFF temperature and an OFF signal is output to the compressor (Comp) 27 (S-24), the compressor (Comp) 27 is stopped, but the refrigerating room temperature. When the compressor (comp) 27 is stopped before the sensor (PCC) 59 reaches the OFF temperature, it is determined whether or not the refrigerator compartment temperature sensor (PCC) 59 is at a predetermined temperature (Poff) or higher (S-27).

In S-27, when the refrigerating room temperature sensor (PCC) 59 is lower than the predetermined temperature (Poff), the refrigerating room damper (PC damper) 37 is closed (S-29), but the refrigerating room temperature sensor (PCC) 59 When is above a predetermined temperature (Poff), the refrigerating chamber damper (PC damper) 37 is open, and the cooling fan (FC fan) 25 operates at a rotation speed lower than the rotation speed when the compressor (comp) 27 is ON. Cooling control is performed (S-28). The off-cycle cooling control (S-28) is performed until the initial predetermined time (Tpc) immediately after the compressor (comp) 27 receives the OFF signal or until the refrigerating room temperature sensor (PCC) 59 reaches the OFF temperature. After that, the refrigerator compartment damper (PC damper) 37 is closed (S-29).

Explaining with the timing chart of FIG. 40, when the compressor (comp) 27 is turned on, the cooling fan (FC fan) 25 is turned on, the freezer compartment damper (FC damper) 68, and the refrigerating chamber damper (PC damper) 37 are in the open state. Next (point e), the refrigerating room damper (PC damper) 37 controls opening and closing according to the temperature of the refrigerating room temperature sensor (PCC) 59 while the compressor (comp) 27 is ON. Then, when the compressor 27 is turned off, the cooling fan (FC fan) 25 is also turned off, and the freezer damper (FC damper) 68 is closed (point f). At this point (point f), if the refrigerator compartment damper (PC damper) 37 is in the open state, the refrigerator compartment damper (PC damper) 37 is in the open state, and the cooling fan (FC fan) 25 is a compressor (compressor). ) Off-cycle cooling control is performed by operating for a predetermined time at a rotation speed lower than the rotation speed at 27ON (points f to g). After that, the cooling fan (FC fan) 25 is stopped, and the refrigerator compartment damper (PC damper) 37 is closed (point g).

The same control is performed thereafter, but if the refrigerator compartment damper (PC damper) 37 is closed at the time when the compressor (compressor) 27 is turned off (point i), the above-mentioned control (off-cycle cooling control) is performed. Do not do.

As described above, the refrigerator of the present embodiment is arranged behind the refrigerating chamber 14, the freezing chamber 18, and the refrigerating chamber 18, and is cooled by the cooler 24 that supplies cold air to the refrigerating chamber 14 and the freezing chamber 18. The cooling chamber 23 in which the fan 25 is housed, the refrigerating chamber damper 37 that controls the cold air supplied from the cooling chamber 23 to the refrigerating chamber 14 based on the refrigerating chamber temperature sensor 59, and the refrigerating chamber 23 to supply the freezing chamber 18 A freezer compartment damper 68 that controls the cold air to be produced based on the freezer compartment temperature sensor 92 and a compressor 27 whose operation is controlled based on the freezer compartment temperature sensor 92 are provided, and the refrigerator compartment damper 37 is opened and frozen. When the chamber damper 68 is open and the compressor 27 is stopped, the refrigerating chamber damper 68 is closed and the refrigerating chamber damper 37 is opened for a predetermined time after the compressor is stopped, and the cooling fan 25 is operated. The cold heat of the cooler 24 can be effectively used during the stoppage, the heat influence on the freezer chamber 18 can be suppressed, the refrigerating chamber 14 can be efficiently cooled, and a highly energy-saving refrigerator can be provided.

Further, the predetermined time after the compressor 27 is stopped is until the temperature at which the refrigerating chamber temperature sensor 59 reaches the temperature at which the refrigerating chamber damper 37 is closed, and the cooling heat of the cooler 24 while the compressor 27 is stopped is cooled. It can be used properly and effectively.

Further, the rotation speed of the cooling fan 25, which operates with the freezer compartment damper 68 closed and the refrigerator compartment damper 37 open for a predetermined time after the compressor 27 is stopped, is smaller than the rotation speed during the compressor operation. It is possible to more effectively utilize the cold heat of the cooler 24 while the compressor is stopped, suppress the thermal influence on the freezer chamber 18, efficiently cool the refrigerator compartment 14, and provide a highly energy-saving refrigerator.
In the present embodiment, the refrigerating chamber damper (PC damper) 37 has been described in that it controls opening and closing, but it may also control the opening degree (angle) of the flap described above. In this case, the temperature fluctuation in the refrigerating chamber can be reduced to approach the target temperature in the storage chamber, and energy saving can be further improved.

<2-4. Defrost control>
FIG. 41 is a flowchart showing the defrost control of the refrigerator cooling system of the present embodiment, and FIG. 42 is a timing chart showing the defrost control of the refrigerator cooling system of the present embodiment.

In FIG. 41, when the defrost signal is input (S-31), the compressor 27 performs continuous operation (pre-cool control) for a predetermined time. Then, the cooler temperature sensor (DFC) determines whether the temperature is T2 or less (S-32), and if the temperature is T2 or less, the refrigerator compartment damper 37 is opened, the freezer compartment damper 68 is closed, and the cooling fan (FC fan) 25 is opened. Turn on (S-33). Then, it is performed until the cooler temperature sensor (DFC) rises to the T2 temperature (S-34). When the cooler temperature sensor (DFC) reaches the T2 temperature in S-34, the refrigerator compartment damper 37 is closed, the freezer compartment damper 68 is opened, the cooling fan (FC fan) 25 is turned off (S-35), and defrosting is performed. The means (defrost heater) 26 is turned on (S-36). While the defrosting means (defrost heater) 26 is ON, the freezer damper 68 is in the open state. Further, when the cooler temperature sensor (DFC) is T2 temperature or higher in S-32, the steps of S-33 and S-34 are not performed, and the process shifts to the step of S-35.

The cooler temperature sensor (DFC) determines whether the temperature is T4 or higher (S-37), and when the temperature reaches T4 or higher, the defrosting means (defrost heater) 26 is turned off and start-waiting control is performed (S-38). After the start waiting time has elapsed, the compressor 27 starts operation (S-39) by the compressor ON signal, and the FC fan delay control is performed to turn on the cooling fan (FC fan) 25 after turning it off for a predetermined time, and the cooler temperature sensor. When (DFC) becomes lower than the freezing room temperature sensor (FCC), the freezing room damper 68 is opened (S-40). After that, a normal cooling operation is performed (S-41).

Explaining with the timing chart of FIG. 42, when a defrost signal is input during the normal cooling operation (points k to l), the compressor 27 and the cooling fan (FC fan) 25 perform precool control for continuous operation for a predetermined time (l to l). m point). During the pre-cool control, the refrigerator compartment damper 37 is closed and the freezer compartment damper 68 is opened to preferentially cool the freezer compartment 18. After the pre-cool control is completed, the compressor is stopped, but the refrigerator damper 37 is used until the cooler temperature sensor (DFC) rises to the T2 temperature for effective use of the cold heat of the cooler 24 and preliminary defrosting of the cooler. The refrigerating room pre-cooling and pre-defrosting control for operating the cooling fan (FC fan) 25 with the freezing room damper 68 closed is performed (mn). Then, the defrosting means 26 is energized and the heat of the defrost heater melts the frost laminated on the cooler 24 (no). During defrosting, the refrigerator damper 37 is closed and the freezer damper 68 is open.

When the cooler temperature sensor (DFC) reaches the T4 temperature or higher, the defrosting means (defrost heater) 26 is turned off and the start waiting control is performed (op). During the start-up waiting control, the refrigerator compartment damper 37 is opened and the freezer compartment damper 68 is opened. After that, the compressor 27 is started, and at that time, fan delay control is performed to turn off the cooling fan (FC fan) 25 for a predetermined time (points p to q). During the fan delay control, the refrigerator compartment damper 37 is opened and the freezer compartment damper 68 is closed. Then, after the fan delay control, the cooling fan (FC fan) 25 is turned on, but the freezer damper 68 keeps the closed state until the cooler temperature sensor (DFC) becomes lower than the freezer temperature sensor (FCC). Damper delay control is performed (points q to r). After that, when the cooler temperature sensor (DFC) becomes lower than the freezer temperature sensor (FCC), the freezer damper 68 is opened, and then a normal cooling operation is performed (r to point).

As described above, the refrigerator of the present embodiment is arranged behind the refrigerating chamber 14, the refrigerating chamber 18, and the refrigerating chamber 18, and is a cooler 24 cooling fan that supplies cold air to the refrigerating chamber 14 and the freezing chamber 18. The cooling chamber 23 in which the 25 is housed, the refrigerating chamber damper 37 that controls the cold air supplied from the cooling chamber 23 to the refrigerating chamber 14 based on the refrigerating chamber temperature sensor 59, and the refrigerating chamber 23 are supplied from the cooling chamber 23 to the freezing chamber 18. A freezer damper 68 that controls the cold air based on the freezer temperature sensor 92, a compressor 27 whose operation is controlled based on the freezer temperature sensor 92, and a defrosting means (defrosting heater) for melting the frost of the cooler 24. ) 26, the precool mode in which the refrigerator compartment damper 37 is closed, the freezer compartment damper 68 is opened, and the cooling fan 25 and the compressor 27 are continuously operated for a predetermined time before the defrosting means 26 is energized, and the precool After the mode, the compressor 27 is stopped, the refrigerator compartment damper 37 is opened, the freezer compartment damper 68 is closed, and the cooling fan 25 is operated for a predetermined time. The cold heat of the cooler 24 after the completion of the pre-cool operation can be effectively used for cooling the refrigerating chamber 14, and a highly energy-saving refrigerator can be provided.

Further, when the defrosting means 26 for melting the frost of the cooler 24 is energized, the refrigerator damper 37 is closed and the freezer damper 68 is opened, and the defrost is removed by introducing cold air by natural convection from the freezer chamber 18. Means (defrosting heater) 26 It is possible to provide a refrigerator capable of promoting an updraft around the cooler when energized and increasing the defrosting efficiency of the cooler 24.

Further, the freezing chamber damper 68 is provided in the freezing chamber cold air return passage where the cold air supplied to the freezing chamber 18 is returned to the cooling chamber 23, and the cooler 24 is provided while effectively utilizing the space of the cooling chamber 23. Defrosting efficiency can be increased.

Further, the cooling fan (FC fan) 25 is turned on after the fan delay control, but the freezer damper 68 remains closed until the cooler temperature sensor (DFC) becomes lower than the freezer temperature sensor (FCC). Since the damper delay control is performed, cold air can be supplied to the refrigerating chamber 14 side without supplying cold air to the refrigerating chamber 18 until the cooler 24 is sufficiently cooled. 14 efficient cooling is possible.

Further, since the freezer damper 68 is opened when the cooler temperature sensor (DFC) becomes lower than the freezer temperature sensor (FCC), the cold air sufficiently cooled by the cooler 24 is supplied to the freezer 18. This makes it possible to reliably prevent the temperature rise of the freezer chamber 18.

Refrigerator room pre-cooling & pre-defrost control in which the refrigerating room damper 37 is opened, the freezing room damper 68 is closed, and the cooling fan (FC fan) 25 is operated until the cooler temperature sensor (DFC) rises to the T2 temperature. The rotation speed of the cooling fan (FC fan) 25 inside may be higher than the rotation speed while the compressor 27 is ON. In this case, the refrigerating chamber pre-cooling & pre-frosting control time can be shortened, the efficient use of the cold heat of the cooler 24 and the overall defrosting time can be shortened, and the temperature due to defrosting of the freezer chamber 18 The rise can be suppressed.

Further, at the start of any of the modes of the start waiting control, the fan delay control, and the FC damper delay control after the completion of defrosting, or at the start of each mode, the refrigerator compartment damper 37 and / or the freezer compartment damper 68 It is desirable to perform opening / closing control that forcibly fully opens the flap and reciprocates the front closing once. As a result, the moisture adhering to the vicinity of the flap of each damper can be removed after defrosting, the trouble of each damper due to the freezing of moisture can be suppressed, and the reliability of the refrigerator can be improved.

<2-5. Temperature and humidity control of vegetable room ＞
FIG. 43 is a flowchart showing the control of the vegetable compartment heater by the humidity sensor of the vegetable compartment of the refrigerator of the present embodiment, and FIG. 44 is the outside air temperature and the energization rate of the vegetable chamber heater by the humidity sensor of the vegetable compartment of the refrigerator of the present embodiment. It is a graph which shows the relationship of.

In FIG. 43, the humidity in the vegetable room is measured by the vegetable room humidity sensor 78 (S-51). It is determined whether the humidity in the vegetable chamber is H1 or less (S-52), and if it is H1 or less, the vegetable chamber heater 79 is energized and controlled by the energization rate K (S-53). Then, the energization is controlled at the energization rate K for a predetermined time (T4) (S-54). Further, if the humidity in the vegetable chamber is H1 or higher in S-52, it is further determined whether it is H2 or higher (S-55). If it is H2 or higher, the vegetable chamber heater 79 is energized and controlled at an energization rate L (S-56). Then, the energization is controlled at the energization rate L for a predetermined time (T4) (S-57). Further, if the humidity in the vegetable chamber is H2 or less (that is, the humidity in the vegetable chamber is between H1 and H2) in S-55, the energization control of the vegetable chamber heater 79 is performed by the energization rate M (S-58). Then, the energization is controlled at the energization rate M for a predetermined time (T4) (S-59).

Specifically, as shown in FIG. 44, the energization rate of the vegetable room heater 79 by the vegetable room humidity sensor 78 is determined for each outside air temperature. For example, when the humidity is high (85% or more), the humidity is medium (85% or more). The energization rate of the vegetable chamber heater 79 is higher than that of 20 to 85%), and the energization rate of the vegetable chamber heater 79 is lower when the humidity is low (20% or less) than when the humidity is medium (20 to 85%).

This makes it possible to control the energization rate of the vegetable room heater according to the humidity in the vegetable room, and with a simple structure, it is possible to prevent dew condensation in the vegetable room 17 while keeping the inside of the vegetable room 17 high humidity. it can. In a conventional refrigerator without a vegetable room humidity sensor, the energization rate of the vegetable room heater is determined based on medium humidity conditions from the balance between reliability against dew condensation and energy saving. However, in the present embodiment, the vegetable room humidity sensor is used. Appropriate energization control of the vegetable compartment heater 79 is possible according to the detection result of 78, and it is possible to balance reliability against dew condensation and energy saving at a high level, and it is possible to achieve both energy saving and freshness of the vegetable chamber. it can.

As described above, the refrigerator of the present embodiment is arranged behind the refrigerating room 14, the freezing room 18, the vegetable room 17, and the freezing room 18, and cool air is supplied to the refrigerating room 14, the freezing room 18, and the vegetable room 17. The cooling chamber 23 in which the cooling cooler 24 and the cooling fan 25 are housed, the refrigerating chamber damper 37 that controls the cold air supplied from the cooling chamber 23 to the refrigerating chamber 14, and the vegetable compartment 17 are supplied from the cooling chamber 23. It is equipped with a vegetable compartment damper 75 that controls cold air, a vegetable compartment humidity sensor 78 that detects the humidity in the vegetable compartment, and a vegetable compartment heater 79 that heats the vegetable compartment 17, and vegetables based on the detected temperature in the vegetable compartment. The chamber damper 75 is open / closed controlled, and the vegetable compartment heater 79 is energized based on the detected humidity of the vegetable chamber humidity sensor 78, and the energization rate of the vegetable chamber heater 79 can be controlled according to the humidity in the vegetable chamber. Therefore, it is possible to provide a refrigerator having a simple structure and capable of preventing dew condensation in the vegetable chamber while keeping the vegetable chamber highly humid.

Further, the vegetable room humidity sensor 78 is arranged on the top surface of the vegetable room 17, and can accurately detect the humidity in the vegetable room.

Further, the vegetable compartment heater 79 is arranged on the partition wall with the storage chamber above the vegetable compartment 17, and can surely prevent dew condensation on the top surface of the vegetable chamber, which is particularly prone to dew condensation.

<2-6. Refrigerator storage capacity detection control>
FIG. 45 is a flowchart showing a cooling system control performed based on a detection result of a storage amount in a refrigerating room in the refrigerator of the present embodiment.

In the figure, when the door switch detects that the door 7 (PC door) of the refrigerator compartment 14 is closed (S-
61), the LED that is the lighting in the refrigerating room 14 is illuminated, the illuminance is detected by the refrigerating room light sensor 97, and the previous illuminance (converted voltage value) and the current illuminance (converted) stored in the memory. The difference from the voltage value) is determined (S-62). Then, the change amount of the stored amount in the refrigerating chamber 14 is calculated by comparing the previous illuminance (converted voltage value) and the current illuminance (converted voltage value) (S-62). Then, when the amount of increase in the stored amount exceeds a predetermined threshold value, control is performed to cancel the energy-saving operation. On the other hand, if the increase in the stored amount does not exceed the predetermined threshold value, the energy-saving operation is continued.

Then, it is determined whether the door 7 of the refrigerating room 14 is opened within a predetermined time (for example, 30 minutes) after the door switch detects the closing of the door 7 (PC door) of the refrigerating room 14 (S-63). If the door 7 is opened, the process returns to S-61. If the door 7 is not opened for a predetermined time (for example, 30 minutes) in S-63, the LED that is the illumination in the refrigerator compartment 14 is irradiated, and the illuminance (converted voltage value) of the refrigerator compartment optical sensor that is held in advance ) And the storage capacity in the refrigerator compartment 14 to calculate the absolute storage capacity in the refrigerator compartment 14 (S-64).

Then, when the absolute storage capacity is larger than S2, the mode P when the storage capacity is large is selected (S-67), the fan voltage and the temperature control setting of each room are changed, and the compressor rotation speed increase control is suppressed. (S-70). On the other hand, when the absolute storage amount is S2 or less in S-65, it is determined whether the absolute storage amount is between S1 and S2 (S-66). Then, if the absolute storage amount is between S1 and S2, the mode Q when the storage amount is medium is selected (S-68), and the compressor rotation speed increase control is suppressed (S-71). Further, when the absolute storage amount is smaller than S1, mode R when the storage amount is small is selected (S-69), and the compressor rotation speed increase control is suppressed (S-72).

Note that the control change in the modes P, Q, and R is not immediately after the determination of S-65 and S-66, but the compressor is temporarily turned off, and when the next compressor 27 is turned on, each mode P, Change the control of Q and R.

As described above, the refrigerator of the present embodiment is provided with the LED lighting 80 and the refrigerating room light sensor 81 in the refrigerating room, and after the door is closed, the LED lighting 80 and the refrigerating room light sensor 81 are used to perform the previous and current times in the refrigerating room. When the door is closed and the door is not opened for a predetermined time, the LED lighting 80 and the refrigerating room light sensor 81 detect the absolute storage amount in the refrigerating room. Appropriate cooling control can be performed according to the storage capacity of the refrigerator, and a convenient refrigerator can be provided.

Further, based on the amount of change in storage between the previous time and the current time in the refrigerating room detected by the LED lighting 80 and the refrigerating room optical sensor 81, it is determined whether to continue or cancel the energy-saving operation, and the operation is controlled by the user. Appropriate cooling control can be performed in consideration of how to use.

Further, the operation of shifting up the rotation speed of the compressor is controlled based on the absolute storage amount in the refrigerating room detected by the LED lighting 80 and the refrigerating room optical sensor 81, and it corresponds to the absolute storage amount in the refrigerating room. The rotation speed of the compressor 27 can be selected, and more appropriate cooling control can be performed according to the amount of storage in the storage chamber.

Further, in the present embodiment, when the door 7 of the refrigerating room 14 is not opened within a predetermined time (for example, 30 minutes) after the door switch detects the closing of the door 7 (PC door) of the refrigerating room 14. The absolute storage amount in the refrigerating room 14 is calculated from the correlation data between the illuminance (converted voltage value) of the refrigerating room optical sensor 81 held in advance and the storage amount in the refrigerating room 14 by irradiating the LED which is the illumination in the refrigerating room 14. Therefore, even if dew condensation or cloudiness temporarily occurs in the vicinity of the LED or the refrigerating room optical sensor 81, which is the lighting in the refrigerating room 14, due to the intrusion of outside air by opening and closing the door 7 of the refrigerating room 14, a predetermined time (for example, 30) Minutes) Since the closed door state is ensured, disturbances such as dew condensation and cloudiness can be eliminated, and the absolute storage capacity in the refrigerator compartment 14 can be calculated accurately.

Then, the control change in the modes P, Q, and R is not immediately after the determination of S-65 and S-66, but the compressor is temporarily turned off, and when the next compressor 27 is turned on, each mode P, By changing the control of Q and R, more stable cooling control can be performed.

According to the present invention, in a refrigerator provided with a damper for controlling the amount of cold air to each storage chamber, when the compressor is stopped with the refrigerator damper open and the freezer compartment damper open, the freezer compartment is used for a predetermined time after the compressor is stopped. The blower is operated with the damper closed and the refrigerator damper open, and can be applied to refrigerators of various types and sizes such as household and commercial use.

1 Refrigerator body 2 Outer box 3 Inner box 4 Foam insulation 5, 6 Partition plate 7, 8, 9, 10, 11 Door 14 Refrigerator room 15 Switching room 16 Ice making room 17 Vegetable room 17a Vegetable room container 18 Freezing room 20 Shelf board 21 Partial room (low temperature room)
22 Chilled room (low temperature room)
22a Cold air inlet 23 Cooling chamber 23a Bottom surface 24 Cooler 25 Cooling fan 26 Defrosting means (glass tube heater, defrosting heater, defrost heater)
26a Heater part 27 Compressor 28 Refrigerator room duct 28a Refrigerator member 28b Duct cover 28bb Mounting part 28c Extension rib 28d Side discharge port 29 Freezer room duct 30 Vegetable room duct 31 Cooling room forming plate 32 Freezing room back plate 33 First cold air supply Port 34 Second cold air supply port 35 Heater cover 36 Drain port 37 Refrigerator room damper 38 Damper fixing frame 39 Refrigerator room damper part 40 Partial room damper part 41 Refrigerator damper drive motor unit 43 Ceiling plate 44 Chilled room container 45 Cold air return Mouth (chilled side)
46 Cold air return passage (chilled side)
47 Chilled room door and handle 48 Opening 49 Temperature control heater 50 Ceiling plate member 51 Partial room door 52 Partial room container 53 Insulation material 54 Partial cold air passage 55 Cold air return port (partial side)
56 Cold air return passage (partial side)
57 Cold air confluence return port 58 Refrigerator room return duct 58a, 58b Concave groove 59 Refrigerator room temperature sensor 60 Partial room temperature sensor 61 Deodorizing unit 62 Freezer room container 62a Lower container 62b Upper container 63 Cold air outlet 64 Refrigerator cold air return port 65 Freezer room Side mouth frame part 66 Cooling room side mouth frame part 66a Lower side 66b Gap part 67 Grill 68 Freezer room damper 69 Grill piece 70 Damper frame 71 Flap 72 Refrigerator damper drive motor unit 73 Claw piece 74 Opening 75 Vegetable room damper 75a Damper piece 76 Vegetable damper drive motor unit 77 Heat shield plate 78 Vegetable room humidity sensor 79 Vegetable room heater (VC heater)
80 LED lighting 81 Refrigerator room light sensor 90 Microcomputer 91 Outside air temperature sensor (ATC)
92 Freezer room temperature sensor (FCC)
93 Vegetable room temperature sensor (VCC)
94 Cooler temperature sensor (DFC)
95 Door open / close detection means (door switch)
96 External illuminance sensor 97 Refrigerator room light sensor 98 Partial room damper (PF damper)

Claims (3)

A cooling chamber, a freezing chamber, a cooling chamber arranged behind the freezing chamber and accommodating a cooler and a blower for supplying cold air to the refrigerating chamber and the freezing chamber, and from the cooling chamber to the refrigerating chamber. A refrigerating room damper that controls the supplied cold air based on the refrigerating room temperature sensor, a freezing room damper that controls the cold air supplied from the cooling room to the freezing room based on the freezing room temperature sensor, and the freezing room temperature. comprising a compressor operation is controlled on the basis of the sensor, and in front the refrigerating chamber temperature sensor reaches the OFF temperature to open the refrigerator compartment damper, and the freezing compartment temperature sensor is closed to the freezing chamber damper When the OFF temperature is reached and the compressor is stopped, the refrigerator is cooled by operating the blower with the refrigerator damper closed for a predetermined time after the compressor is stopped. If the refrigerating chamber damper is in the closed state when the compressor is stopped, the refrigerating chamber damper remains in the closed state and does not cool the refrigerating chamber even after the compressor is stopped . The first aspect of claim 1 , wherein the refrigerating chamber damper controls the flap opening degree by changing the flap angle of the refrigerating chamber damper based on the detection temperature of the refrigerating chamber temperature sensor and the target temperature of the refrigerating chamber. refrigerator. The rotation speed of the blower that operates with the refrigerator compartment damper open for a predetermined time after the compressor is stopped is set to be smaller than the rotation speed during the compressor operation according to claim 1 or 2. Refrigerator.

Images