JP2015163839A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a refrigerator capable of accurately detecting stored articles in the refrigerator.SOLUTION: A refrigerator comprises: a storage room including a door that can be opened/closed; a cooling mechanism cooling the storage room; a light source section radiating light into the storage room; an optical sensor section that can receive the light radiated from the light source section; and a control unit controlling the light source section to radiate the light and controlling a cooling capacity in the storage room on the basis of a quantity of light received by the optical sensor section, the control unit exerting at least any of cooling controls to increase a cold air introduction amount into the storage room, to lower a cold air temperature, and to agitate indoor air if the quantity of light received by the optical sensor section is smaller than a predetermined quantity of received light.

Description

  The present invention relates to a refrigerator that detects the state of stored items in a refrigerator.

Generally, a refrigerator includes an internal chamber having a door that can be opened and closed, a mechanism for cooling the internal chamber, and an internal temperature sensor that detects an air temperature in the internal chamber.
In such a refrigerator, if the door is opened with a large amount of storage in the refrigerator and a new storage is inserted, the storage stored in advance is obstructed and the cooling air does not easily reach the new storage. There is a risk that the quality of the new stored items may be deteriorated without being cooled.
When the cold air outlet and the internal temperature sensor are installed close to each other, the air in the vicinity of the internal temperature sensor is likely to be cooled, so that it is easily determined that the interior is sufficiently cooled. For this reason, even though the new stored item is not sufficiently cooled, it is determined that the new stored item is sufficiently cooled, and blowing out of the cold air is suppressed, which may increase the average temperature in the chamber.
In addition, when the cold air outlet and the internal temperature sensor are installed far away from each other, the air in the vicinity of the internal temperature sensor is difficult to cool, so that it is easily determined that the interior is not sufficiently cooled. For this reason, although the inside of the refrigerator is generally cooled, cold air is continuously blown out, and the stored items near the cold air outlet may be frozen.
Since such a subject exists, the technique which detects the storage thing in the chamber | room interior is proposed.

And conventionally, an "infrared sensor assembly that is mounted on the inner wall of the refrigerator compartment and receives infrared rays generated from a high temperature heat load and detects the temperature and the position where the high temperature heat load is generated." The refrigerator includes a light receiving range limiting unit configured to limit a light receiving range of infrared rays received by the infrared sensor (see, for example, Patent Document 1).
In addition, “a single or a plurality of internal light sensors 37a outside the refrigerator detect the surrounding storage items corresponding to the light sensor in the refrigerator. It has been devised that it is performed by determining whether or not a shadow is generated by blocking light by an internal storage item or the like ”(for example, see Patent Document 2).

Japanese Patent No. 4012078 (page 3, FIG. 1) Japanese Patent Laying-Open No. 2006-336963 (6th page, 7th page, FIG. 2, FIG. 6)

  According to the technique described in Patent Literature 1, an uncooled stored item is detected by detecting radiant heat emitted from an object to be cooled. However, in the case of a method for detecting radiant heat emitted from an object to be cooled, if the uncooled storage item is placed in a location behind the already cooled storage item, the uncooled storage item cannot be detected. .

  Moreover, according to the technique described in Patent Document 2, the presence or absence of a stored item is detected by detecting the presence or absence of a shadow with an optical sensor to change the illumination intensity in the cabinet. However, since the cooling control according to the amount of the stored items is not performed, the problem relating to the cooling failure of the stored items cannot be solved.

The present invention has been made to solve at least one of the above-described problems, and a first object is to obtain a refrigerator capable of accurately detecting the contents stored in the refrigerator. .
Moreover, the 2nd objective is to obtain the refrigerator which can preserve | save a stored item in a high quality state according to the quantity and position of the detected stored item.

  The refrigerator according to the present invention includes an inner chamber having an openable / closable door, a cooling mechanism that cools the inner chamber, a light source unit that irradiates light into the inner chamber, and light irradiated by the light source unit. An optical sensor unit that can receive light, and a control unit that irradiates light to the light source unit and controls the cooling capacity of the indoor chamber based on the amount of light received by the optical sensor unit, When the amount of light received by the optical sensor unit is smaller than a predetermined amount of received light, at least one of increasing the amount of cool air introduced into the interior chamber, decreasing the cool air temperature, and stirring the interior air Cooling control is performed.

  Since the refrigerator according to the present invention has the above-described configuration, it is possible to accurately detect the stored items in the interior of the cabinet.

It is a figure which shows the structure of the refrigerator which concerns on Embodiment 1. FIG. It is a figure explaining arrangement | positioning of the light source in the refrigerator compartment which concerns on Embodiment 1, and the irradiation area | region of a light source. 3 is a functional block diagram of the refrigerator according to Embodiment 1. FIG. 4 is a flowchart showing main processing of the refrigerator compartment according to the first embodiment. 4 is a flowchart showing stored item detection processing according to Embodiment 1; It is a schematic diagram in the refrigerator compartment explaining the stored article detection process according to the first embodiment. 5 is a table showing a relationship between a light source to be turned on and a light reception intensity of an optical sensor in the stored object detection process according to the first embodiment. It is a figure explaining the structure in the refrigerator compartment which concerns on Embodiment 2. FIG. It is a figure explaining the structure in the refrigerator compartment which concerns on Embodiment 3. FIG. It is a figure explaining the structure of the light source which concerns on Embodiment 4. FIG. FIG. 10 is a diagram illustrating a configuration of a light source according to a fifth embodiment. FIG. 10 is a diagram illustrating a configuration of a light source according to a sixth embodiment. FIG. 10 is a diagram illustrating a configuration of a light source according to a seventh embodiment. It is a figure explaining the 1st example of a structure of the light source which concerns on Embodiment 8. FIG. It is a figure explaining the 2nd example of a structure of the light source which concerns on Embodiment 8. FIG. It is a figure explaining the structure in the refrigerator compartment which concerns on Embodiment 9. FIG. 18 is a flowchart showing a cooling control process according to the ninth embodiment.

Embodiment 1 FIG.
(Configuration of refrigerator 100)
FIG. 1 is a diagram illustrating a configuration of a refrigerator 100 according to Embodiment 1 of the present invention, where FIG. 1 (A) is a view when viewed from above, and FIG. 1 (B) is a view when viewed from the side. It is. In FIG. 1, a refrigerator 100 includes a plurality of compartment rooms that are partitioned and independent. As the interior room, the refrigerator compartment 10 provided at the top and provided with the door 11, the switching chamber 30 provided below the refrigerator compartment 10 and provided with the drawer door 31, and the drawer door arranged below the switching chamber 30. The vegetable compartment 32 provided with 33, and the freezer compartment 34 arrange | positioned under the vegetable compartment 32 and provided with the drawer door 35 are provided. The door 11 has an operation panel for setting the cooling temperature of each chamber in the refrigerator 100, a display panel for displaying various information such as the cooling state of each chamber, and various information such as cooling information for each chamber. The front panel 12 is provided with a voice output device that outputs a voice.

(Cooling mechanism)
On the back side of the refrigerator 100, as a cooling mechanism for cooling each chamber, a compressor 21, a heat exchanger 22, a cool air blower fan 23, a back cool air passage 24, a cool air outlet 25, and a control are provided. Device 16.
The control device 16 includes a control circuit and a storage device that stores an operation program thereof, and controls the operation of the refrigerator 100.
The cold air produced by the compressor 21 and the heat exchanger 22 is blown by the cold air blower fan 23, and blown out from the cold air outlet 25 to each chamber through the back cold air passage 24. The control device 16 controls each chamber to be maintained at a set temperature by controlling the output of the compressor 21 and the amount of air blown by the cool air blower fan 23. The control device 16, the compressor 21, the heat exchanger 22, the cool air blower fan 23, the back cool air passage 24, and the cool air outlet 25 are collectively referred to as a cooling mechanism 20.

(Structure of the refrigerator compartment)
The refrigerator compartment 10 includes a door opening / closing detection switch 13 that detects the open / closed state of the door 11, a door pocket 14 provided inside the door 11, and shelves 15 a and 15 b (generically referred to as a shelf 15) that partition the inside of the refrigerator compartment 10 into a plurality of compartments. In some cases). As shown in FIG. 1, a storage item 18 such as food can be stored.
Further, the refrigerator compartment 10 includes one or more light sources 1, one or more optical sensors 2, an air temperature sensor 3 that detects the air temperature in the refrigerator compartment 10, and a warehouse that stirs the air in the refrigerator compartment 10. An internal stirring fan 4 is provided.

(Configuration of light source and optical sensor)
The light source 1 emits light by an arbitrary light generation method such as a fluorescent lamp, LED, or electroluminescence. The wavelength range of the emitted light may be any wavelength range such as ultraviolet, visible, and infrared. In the first embodiment and the embodiments described later, the entire aggregate of one or more light sources 1 corresponds to the light source unit of the present invention.
The optical sensor 2 is a device that detects light emitted from the light source 1, and an arbitrary type of device such as a photodiode or a photomultiplier tube can be used. In the first embodiment and the embodiments to be described later, the entire assembly of one or more photosensors 2 corresponds to the photosensor unit of the present invention.

  Although details will be described later, in the first embodiment, the light sensor 2 receives the light emitted from the light source 1 and detects the amount and position of the storage items 18 in the refrigerator compartment 10 according to the light reception intensity of the light sensor 2. Do. When the light receiving intensity of the optical sensor 2 is low or when the optical sensor 2 cannot receive light, it is determined that there is an object that blocks light on the optical path from the light source 1 to the optical sensor 2, that is, the storage object 18, and the light receiving intensity is high. Determines that the storage item 18 does not exist. In the first embodiment, by providing a plurality of light sources 1, a plurality of optical paths from the light source 1 to the optical sensor 2 are provided. By doing in this way, the quantity and position of the stored item 18 can be detected with high accuracy.

  2A and 2B are diagrams showing the arrangement of the light sources 1 in the refrigerator compartment 10, in which FIG. 2A is a view seen from above, and FIG. 2B is a view seen from the side. In FIG. 2, the light sources 1 are distinguished from each other by reference numerals of the light sources 1 a to 1 i. As shown in FIG. 2, the light sources 1a and 1b are provided on the side walls near the ceiling, the light sources 1c and 1d are provided on the lower side of the shelf 15a, and the light sources 1e to 1i are provided on the door 11 or the inner wall near the door 11. The light sources 1a to 1i are installed at an angle such that emitted light can be received by the optical sensor 2, and an optical path from the light sources 1a to 1i to the optical sensor 2 is formed. And the angle of the light source 1a-light source 1i is adjusted and installed so that each optical path may not overlap as much as possible. The installation position, the number, the installation angle, and the irradiation angle of the light source 1 of the light source 1 are adjusted according to the installation position of the light source 1, the installation position of the optical sensor 2, and the structure in the refrigerator compartment 10 such as the shelf 15. However, specific examples thereof will be described in the second embodiment and later.

  A plurality of the optical sensors 2 can be provided in the refrigerator compartment 10 so that stored items can be detected. In particular, as shown in FIG. 1, by providing a plurality of optical sensors 2 between the shelves 15a and 15b, it is possible to detect the amount and position of the stored items placed on the shelves 15a and 15b.

  Note that the light source 1 and the optical sensor 2 need to be connected for energization and operation instructions, and thus are preferably installed in an outer portion such as a wall portion in the refrigerator 100. By doing in this way, wiring can be provided in a wall and it can avoid that wiring is exposed in the chamber | room inside which the storage thing contacts. In addition, when installing in the site | part which can be moved and removed, such as the shelf 15 and the door pocket 14, it is desirable to provide wiring so that attachment or detachment is easy or to provide a mechanism capable of non-contact transmission.

(Function block)
FIG. 3 is a functional block diagram of the refrigerator 100 according to the first embodiment. The same components as those in FIGS. 1 and 2 are denoted by the same reference numerals. The control device 16 acquires the open / closed state of the door 11 from the door open / close detection switch 13 and acquires the air temperature in the refrigerator compartment 10 from the air temperature sensor 3 so that the inside of the refrigerator compartment 10 is maintained at the set temperature. The cooling mechanism 20 is controlled according to a program stored in advance. Controlling the cooling mechanism 20 means controlling the operating state of the components of the cooling mechanism 20 such as the output of the compressor 21, the amount of air blown by the cool air blower fan 23, and the degree of opening / closing of the cold air outlet 25.
The control device 16 controls the lighting of the light source 1 to detect the storage state of the storage item 18 based on the received light intensity received by the optical sensor 2 and controls the cooling mechanism 20 based on the result.
Further, the control device 16 outputs information related to the cooling state of each chamber, information related to failure, information related to the detected stored items, and the like by the front panel 12 or the blinking operation of the light source 1. For example, in the case where a plurality of light sources 1 are provided, when the door 11 is opened, the light sources 1 provided in the vicinity of a place where excessive items are present can be blinked. Furthermore, in the event of a failure, the abnormality can be notified by changing the illumination intensity or the blinking cycle of the light source 1 to blink.

(Main processing of the refrigerator compartment 10)
FIG. 4 is a flowchart showing the main process of the refrigerator compartment 10.
When the door opening / closing detection switch 13 detects that the door 11 is opened for a predetermined time or more (S101), the door 11 is operated in the interior viewing illumination mode until the door 11 is closed (No in S102) ( S106). In the interior viewing illumination mode, the illumination light source (not shown in FIG. 1) in the refrigerator compartment 10 is turned on to enhance the visibility in the refrigerator compartment 10.
When the door 11 is closed (Yes in S102), a stored item detection process for detecting the amount and position of the stored item in the refrigerator compartment 10 is performed (S103). Details of the stored item detection process will be described later.
And cooling control in the refrigerator compartment 10 is performed based on the quantity and position of the storage thing detected by step S103, and the temperature detected by the air temperature sensor 3 (S104). When it is determined that there are many items to be stored, in order to avoid a state in which cooling air is not supplied to newly put uncooled items, increase the amount of cool air introduced into the chamber and decrease the cool air temperature. Then, the internal agitation fan 4 is used to agitate the internal air. By doing in this way, cooling of the uncooled storage thing can be accelerated | stimulated. Further, when it is determined that the amount of stored items is small, an energy saving operation is performed to reduce the amount of cold air introduced. By doing in this way, energy consumption can be reduced. By performing cooling control using information related to the amount and position of stored items in addition to the air temperature in the refrigerator compartment 10, the interior of the refrigerator compartment 10 can be maintained in a more optimal cooling state.

(Storage detection process)
Next, details of the stored item detection process shown in step S103 of FIG. 4 will be described.
FIG. 5 is a flow chart showing the stored item detection process, and FIG. 6 is a schematic view of the inside of the refrigerator compartment 10 explaining the stored item detection process from the side. The light source 1, the optical sensor 2, the shelf 15, the stored item 18, The air temperature sensor 3 and the optical path from the light source 1 to the optical sensor 2 are mainly shown. FIG. 6A shows a case where the amount of stored items is small, and FIG. 6B shows a case where the amount of stored items is large.
In FIG. 6, the light source 1 is distinguished from the light source 1 j to the light source 1 m, and the optical sensor 2 is distinguished from the optical sensor 2 a to the optical sensor 2 c.

(Configuration of light source 1 and optical sensor 2)
In the example of FIG. 6, the light source 1j is provided on the ceiling, the light source 1k is provided on the lower surface of the shelf 15a, the light source 1l is provided on the door 11, and the light source 1m is provided on the bottom surface on the door 11 side. All of the optical sensors 2 are provided on the wall surface on the rear cold air passage 24 side, the optical sensor 2a is between the ceiling and the shelf 15a, the optical sensor 2b is between the shelf 15a and the shelf 15b, and the optical sensor 2c is between the shelf 15b and the bottom surface. Located between and. The air temperature sensor 3 is provided on the bottom surface on the back side cold air passage 24 side. The cold air outlet 25 to the refrigerator compartment 10 is located between the shelf 15a and the ceiling and near the upper side of the optical sensor 2a.
In FIG. 6, a solid line arrow extending from the light source 1 to the optical sensor 2 represents an optical path. For convenience, one solid line arrow will be described as light intensity 1. The broken-line arrows represent the optical path of light that is slightly reflected by the stored item or shelf and detected by the optical sensor 2, and this will be described as light intensity 0.5 for convenience.

(First example of stored object detection processing)
Next, a first example of the stored item detection process according to the first embodiment will be described with reference to FIGS. 5 and 6.
In FIG. 5, when the stored item detection process is started, the control device 16 turns on all the light sources 1j to 1m (S111). And the control apparatus 16 acquires the output value which the optical sensor 2 outputs based on received light intensity, and detects the stored item in the refrigerator compartment 10 (S112).

The detection of the stored items will be described more specifically.
As shown in FIG. 6A, it is assumed that the stored item 18a is placed on the shelf 15b. When all of the light source j to the light source 1m are turned on, the light path is reflected directly to the optical sensor 2a to the optical sensor 2c as indicated by the solid line arrows, and to the storage items 18 and the shelf 15 as indicated by the broken line arrows S1 and S2. An optical path to the optical sensor 2 is generated. The received light intensity of each photosensor is photosensors 2a: 3, 2b: 2.5, 2c: 1.5, and the total is 7.
Further, as shown in FIG. 6B, it is assumed that the stored items 18a to 18d are placed on the shelf 15a, the shelf 15b, and the bottom surface and the amount of stored items is large. When all of the light sources 1j to 1m are turned on, the received light intensity of each optical sensor is the optical sensors 2a: 0, 2b: 1.5, 2c: 0.5, and the total is 2.
As described above, since the light receiving intensity of the optical sensor 2 varies depending on the amount and position of the stored item, the output value of the optical sensor 2 in a state where no stored item exists, and the output value in the state of storing the stored item By comparing the two, the amount of stored items can be determined. For example, when the received light intensity is low, it can be determined that the optical path from the light source 1 to the optical sensor 2 is blocked, that is, there is a stored amount.

  In FIG. 5, the processes in steps S111 and S112 are repeated until the detection of the stored item is completed. When the detection of the stored item is completed (S113), the light source 1 is turned off (S114) and the process is ended. To do.

  In this way, it is possible to detect the presence / absence of a stored item based on the received light intensity of the optical sensors 2a to 2b when the light sources 1j to 1m are turned on.

(Second example of stored object detection processing)
Next, a second example of the stored item detection process according to the first embodiment will be described with reference to FIGS. 5 and 6. In the second example described here, the control device 16 corresponds to the optical path forming means of the present invention.
In the first example described above, all the light sources 1j to 1m are turned on in step S111. In the second example, only the light source 1j is turned on first (S111). Based on the received light intensity of the optical sensor 2a to optical sensor 2c when the light source 1j is turned on, the stored items on the optical path from the optical source 1j to the optical sensor 2a to optical sensor 2c are detected (S112). In step S113, the process proceeds to No, only the light source 1k is turned on (S111), and the light from the light source 1b2 to the light sensor 2a to the light sensor 2c is based on the received light intensity of the light sensor 2a to the light sensor 2c at this time. A stored item on the road is detected (S112). Similarly, the stored items are detected by turning on only the light source 1l and the light source 1m. When all the light sources 1j to 1m are sequentially turned on to detect the stored items, the stored item detection processing is terminated (S113), all the light sources 1j to 1m are turned off (S114), and the processing is terminated. .

  Thus, by sequentially turning on the light sources 11 to 1m having different irradiation directions and detecting the stored items, the position of the stored items 18 placed in the refrigerator compartment 10 can be specified in more detail. For example, if the light sensor 1a can receive light and the light sensor 2b cannot receive light when the light source 1j is turned on, a stored item is placed on the optical path from the light source 1j to the light sensor 2b. I understand that it is done. As described above, the position of the stored item can be determined based on the light source 1 that is turned on, the light reception intensity of the optical sensor 2, and the position of the optical sensor 2 that has received the light.

In the second example, the light source 1j to the light source 1m are sequentially turned on one by one. However, the light source 1j to the light source 1m may be turned on sequentially, and the amount and position of the stored items can be detected similarly. .
Further, the output value of the optical sensor 2 is obtained with all the light sources 1 turned on first, the optical sensor 2 having a low output value is roughly specified, and the optical source 1 that forms an optical path to the optical sensor 2 is formed. May be turned on in a predetermined pattern to detect the stored items. By doing in this way, a stored item can be detected with high accuracy, and a stored item can be detected in a shorter time than when the light sources 1 are turned on one by one.

  In the first example and the second example described above, mapping of output values of the optical sensor 2 when various stored items having different amounts, placement positions, heights, and the like are placed in the refrigerator compartment 10 is performed. Data may be stored in the storage unit of the control device 16 in advance. Then, by comparing the actual output value of the optical sensor 2 with the mapping data, it is possible to determine the amount, position, height, and the like of the stored items in the refrigerator compartment 10.

(Third example of stored item detection processing)
Next, a third example of the stored item detection process according to the first embodiment will be described with reference to FIG. In the first example and the second example described above, the stored item is detected according to the light receiving intensity of the light received by each optical sensor 2, but in the third example described here, each optical sensor 2 is detected. The amount of stored items is determined after weighting the received light intensity.

  As shown in FIG. 6, since the optical sensor 2a is provided in the vicinity of the cold air outlet 25, whether or not an article is placed in the vicinity of the cold air outlet 25 based on the light receiving intensity of the optical sensor 2a. Can be judged. Here, if the vicinity of the cold air outlet 25 is covered with stored items, it becomes difficult for the cold air to reach the entire refrigerator compartment 10, and if the vicinity of the cold air outlet 25 is open, the cold air is easily circulated. Thus, the presence or absence of the storage items 18 in the vicinity of the cold air outlet 25 greatly affects the cooling capacity of the refrigerator compartment 10. For this reason, after weighting the output value of the optical sensor 2a, the stored item is determined.

FIG. 7 shows the output value of the optical sensor 2a when the light sources 1j to 1m shown in FIGS. 6A and 6B are turned on, the value obtained by weighting the output value of the optical sensor 2a twice. 3 is a table showing output values of the optical sensor 2b and the optical sensor 2c. The upper part of the table of FIG. 7 is the case of FIG. 6A, the lower part is the case of FIG. 6B, the output values when the light sources 1j to 1m are lit alone, and all the light sources 1j to light sources. The output value when 1 m is turned on is shown.
As shown in FIG. 7, the stored item is detected based on a value obtained by adding twice the weight to the output value of the optical sensor 2a and the output values of the optical sensor 2b and the optical sensor 2c. As described above in the first example, all the light sources 1j to 1m may be turned on to detect the stored items, or as described above in the second example, the light sources 1j to 1m may be sequentially turned on and stored. Object detection may be performed.

  In this way, by weighting the output value of the optical sensor 2a in the vicinity of the cold air outlet 25 and judging the amount and position of the stored items, the vicinity of the cold air outlet 25 in the vicinity of the cold air outlet 25 having a large influence on the cooling capacity in the refrigerator compartment 10 is determined. It is possible to determine the total amount of stored items in the refrigerator compartment 10 that places importance on the state of the stored items. By performing the cooling control of the refrigerator compartment 10 based on the amount and position of the stored items thus detected (step S105 in FIG. 4), the inside of the refrigerator compartment 10 can be maintained in an appropriate cooling state.

  In the above-described third example of the stored item detection process, the case where weighting is applied to the output value of the optical sensor 2a in the vicinity of the cold air outlet 25 has been described as an example. However, weighting is applied according to the structure in the refrigerator compartment 10. The optical sensor 2 can be selected as appropriate.

As described above, according to the refrigerator 100 according to the first embodiment, when the door 11 of the refrigerator compartment 10 is closed, the light source 1 provided in the refrigerator compartment 10 is irradiated with light for a predetermined time, Based on the received light intensity detected by the optical sensor 2, the amount and position of the stored items in the refrigerator compartment 10 are detected. For this reason, the storage state in the refrigerator compartment 10 can be detected accurately.
Further, since the stored items are detected in a state where the door 11 of the refrigerator compartment 10 is closed, there is no influence of external light from the refrigerator compartment 10, and the detection accuracy of the stored items can be improved.
In the detection of the stored items, a plurality of light sources 1 are provided to constitute the light source unit of the present invention, and a plurality of optical paths from the light source unit to the optical sensor 2 are formed. Since a plurality of optical paths are thus formed, a wide range of stored items can be detected, and the amount and position of the stored items can be detected with higher accuracy.

Embodiment 2. FIG.
In the second embodiment, a configuration example of the light source 1 and the optical sensor 2 relating to the detection of stored items will be mainly described. The second embodiment can be applied to the first embodiment described above.
FIG. 8 is a diagram showing a configuration when the refrigerator compartment 10a according to Embodiment 2 of the present invention is viewed from the side. In FIG. 8, the same components as those in the first embodiment are denoted by the same reference numerals. In FIG. 8, the light source 1 is distinguished from the light source 1 n to the light source 1 p, and the optical sensor 2 is distinguished from the optical sensor 2 d to the optical sensor 2 f. Moreover, in FIG. 8, the flow of the cold air in the refrigerator compartment 10a is notionally shown by the white arrow.

  The refrigerator compartment 10a has three cold air outlets 25a to 25c (sometimes collectively referred to as cold air outlets 25) on the back side cold air passage 24 side corresponding to the space partitioned by the shelf 15a and the shelf 15b. Prepare. The cold air outlet 25a to the cold air outlet 25c are located above the space partitioned by the shelf 15a and the shelf 15b, and the cold air can pass through the bottom surface or the upper side of the stored items 18 placed on the shelf 15. .

The light source 1n to the light source 1p are highly directional light sources, and are installed in a direction to irradiate light substantially horizontally from the door 11 side to the back cold air passage 24 side at a position directly below the ceiling or shelf 15 of the refrigerator compartment 10a. Yes.
The optical sensors 2d to 2f are installed on the wall on the rear cold air path 24 side on the optical paths of the light sources 1n to 1p. Since the cold air outlet 25a to the cold air outlet 25c are located above the space partitioned by the shelves 15a and 15b, the optical sensor 2d, the optical sensor 2e, and the optical sensor 2f are the cold air outlet 25a and the cold air outlet 25b, respectively. It can be said that it is installed in the immediate vicinity of the cold air outlet 25c.

  In the refrigerating room 10a configured as described above, light emitted from the light source 1n, the light source 1o, and the light source 1p is incident almost straight on the optical sensor 2d, the optical sensor 2e, and the optical sensor 2f, respectively. The optical path from the light source 1n to the light source 1p to the optical sensor 2d to the optical sensor 2f is substantially the same height as the position where the cold air blown from the cold air outlet 25a to the cold air outlet 25c flows, and the flow of the cold air It becomes almost parallel.

  Then, the stored items are detected as described in the first embodiment. By providing an optical path directly below the ceiling or shelf 15, it is possible to detect whether there is a stored item directly below the ceiling or shelf 15. If the light emitted from the light source 1 is received by the optical sensor 2 without being substantially attenuated, it can be understood that the stored item does not block the ceiling or the shelf 15 directly below.

For example, as shown in FIG. 8, if the storage items 18a and storage items 18b placed on the shelf 15a are short, an appropriate space is secured between the storage items and the ceiling. For this reason, the cold air blown out from the cold air outlet 25a can pass through the upper portion of the stored item 18a and the stored item 18b and circulate in the refrigerator compartment 10a as shown by the arrow T1.
However, when the storage item 18d is tall, there is almost no space between the storage item 18d and the shelf 15b. For this reason, the flow of the cold air blown out from the cold air outlet 25c stagnate, and the one installed on the door 11 side like the stored item 18e cannot be cooled effectively.

  As described in the second embodiment, it is possible to determine whether or not the flow of the cold air is obstructed by detecting whether or not there is a stored item directly under the ceiling or shelf 15 that is the path of the cold air. For this reason, when the flow of cold air is obstructed, a process such as notifying the user by the front panel 12 can be performed, and the cooling failure due to the stored items obstructing the flow of cold air can be reduced.

  As described above, according to the second embodiment, an optical path from the light source 1 to the optical sensor 2 is provided immediately below the ceiling or shelf 15, and the flow of cold air blown from the cold air outlet 25 and the optical path substantially coincide. It comprised so that it might detect the storage thing. Since it is possible to detect the presence or absence of a stored item directly below the ceiling or shelf 15 that is the flow path of the cold air, it is detected whether there is a space where cold air flows above the stored item and whether the flow of the cold air is obstructed. be able to.

  The positional relationship among the light source 1, the optical sensor 2, and the cold air outlet 25 described in the second embodiment is not limited to that shown in FIG. 8, and the optical path from the light source 1 to the optical sensor 2 is Any structure may be used as long as it is provided so as to substantially coincide with the cold air flow path blown from the outlet 25.

Embodiment 3 FIG.
In the third embodiment, a configuration example of the light source 1 and the optical sensor 2 related to detection of stored items will be mainly described. The third embodiment is applicable to the first embodiment described above. In the third embodiment, the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals.

  FIG. 9 is a diagram showing a configuration when the refrigerator compartment 10b according to Embodiment 3 of the present invention is viewed from the side. In FIG. 9, the light source 1 is distinguished from the light source 1 q to the light source 1 s, and the optical sensor 2 is distinguished from the optical sensor 2 g to the optical sensor 2 i. Moreover, in FIG. 9, the flow of the cold air in the refrigerator compartment 10b is notionally shown by the white arrow.

The refrigerator compartment 10b has three cold air outlets 25a to 25c (sometimes collectively referred to as cold air outlets 25) on the back side of the cold air passage 24 corresponding to the space partitioned by the shelf 15a and the shelf 15b. Prepare. The cold air outlet 25a to the cold air outlet 25c are located above the space partitioned by the shelf 15a and the shelf 15b, and the cold air can pass through the bottom surface or the upper side of the stored items 18 placed on the shelf 15. .
Hereinafter, three configuration examples of the light source 1 and the optical sensor 2 will be described with reference to FIG.

(First configuration example of the light source 1 and the optical sensor 2)
The light source 1q is installed on the ceiling so as to irradiate light downward substantially vertically from the ceiling direction. A reflecting plate 5a is provided on the top surface of the shelf 15a at a position where light from the light source 1q is incident. And the optical sensor 2g is provided in the position which can receive the light from the light source 1q which the reflecting plate 5a reflected.

  In such a configuration, the light emitted from the light source 1q takes an optical path that travels almost directly to the reflecting plate 5a, is reflected by the reflecting plate 5a, and enters the optical sensor 2g. For this reason, the optical path from the light source 1q to the reflecting plate 5a crosses the cold air U1 blown from the cold air outlet 25a.

Then, the stored items are detected as described in the first embodiment. By providing an optical path so as to cross the cold air U1 blown out from the cold air outlet 25a, it is possible to detect whether there is an article in front of the cold air outlet 25a.
As described above, according to the first configuration example, it is possible to detect the presence or absence of the storage object in front of the cold air outlet 25a, and therefore it is possible to detect whether or not the storage object obstructs the flow of the cold air blown out from the cold air outlet 25a. .

(Second configuration example of the light source 1 and the optical sensor 2)
The light source 1r is provided on the door 11 side in such a direction as to irradiate light from the door 11 side toward the back cold air passage 24 side. A reflection plate 5b that reflects light from the light source 1r is provided on the wall surface on the side of the cold air passage 24 that is substantially in front of the light source 1r. The optical sensor 2h is provided in the vicinity of the light source 1r so as to receive light from the light source 1r reflected by the reflecting plate 5b.

In such a configuration, the light emitted from the light source 1r takes an optical path that travels almost straight to the reflecting plate 5b, is reflected by the reflecting plate 5b, and enters the optical sensor 2h. Then, the stored items are detected as described in the first embodiment.
As described above, according to the second configuration example, since the reflection plate 5b that reflects the light emitted from the light source 1r is provided, the light source 1r and the optical sensor 2h can be provided on the same substrate. For this reason, the same effect as that of the first embodiment can be obtained, and the effect that the wiring such as the power source to the light source 1r and the optical sensor 2h can be simplified can be obtained.
This second configuration example can also be used in combination with the above-described second embodiment.

(Third configuration example of the light source 1 and the optical sensor 2)
The light source 1s is provided on the wall surface on the back side cold air passage 24 side, and light is irradiated from the back side cold air passage 24 side toward the door 11 side. Here, the light irradiated by the light source 1s is infrared light. The optical sensor 2i is provided on the door 11 side, and is installed in a direction capable of receiving light from the light source 1s. The optical sensor 2i is a sensor that receives light emitted from the light source 1s, and also has an infrared temperature detection sensor function capable of detecting the radiant heat of the stored item.

In such a configuration, the infrared light emitted from the light source 1s takes an optical path from the back cool air path 24 side toward the door 11 and enters the optical sensor 2i. Then, the stored items are detected as described in the first embodiment.
Moreover, since the optical sensor 2i is a temperature detection sensor capable of detecting the temperature of the stored item and is provided on the door 11 side, the temperature of the stored item placed on the door 11 side can be detected. And the control apparatus 16 (not shown in FIG. 9) performs cooling control using the temperature information of the storage thing which the optical sensor 2i detected together.
The uncooled storage newly stored in the cabinet is often placed on the door 11 side (a position away from the cold air outlet 25c), and if the cold air does not spread, the cooling may be poor. . However, it is possible to detect whether there is an uncooled stored object by performing temperature detection together with the presence / absence of the stored object by the optical sensor 2i.

As described above, according to the third configuration example, the light source 1 s that emits infrared light is provided on the back cold air passage 24 side, and can receive the infrared light from the light source 1 s and can detect the temperature of the stored item. Was provided on the door 11 side. For this reason, the same effects as those of the first embodiment can be obtained, and the temperature of the stored item can also be detected.
This third configuration example can also be used in combination with the above-described second embodiment.

Embodiment 4 FIG.
In the fourth embodiment, a configuration example of the light source 1 and the optical sensor 2 will be described. The fourth embodiment can be used in combination with the first and second embodiments described above. In the fourth embodiment, the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals.

  FIG. 10 is a diagram showing the configuration of the light source 1 and the optical sensor 2 in the refrigerator compartment 10c. FIG. 10A shows a view of the inside of the refrigerator compartment 10c from above, and FIG. 10B shows a view seen from the side. In FIG. 10, Q <b> 1 displayed in a shaded manner schematically represents the irradiation range of the light source 1.

  The light source 1 is installed at the end of the shelf 15a on the door 11 side and below the shelf 15a so as to irradiate the light toward the rear cold air passage 24 side. The light source 1 is moved and fixed in a substantially horizontal direction by a light source moving mechanism (not shown) having a driving mechanism such as a stepping motor. The operation of the light source moving mechanism can be controlled by the control device 16 (not shown in FIG. 10). In the fourth embodiment, the light source moving mechanism and the control device 16 correspond to the optical path forming means of the present invention.

  The optical sensor 2 is installed on the back side of the air outlet cover 26 (on the back side cold air passage 24 side). The blower outlet cover 26 is a cover configured to allow ventilation such as a mesh shape or a lattice shape in order to prevent foreign matter from entering the cold wind blower outlet 25 and to allow the blowing of cold air. The optical sensor 2 can receive light through the mesh or lattice of the outlet cover 26. The optical sensor 2 is moved and fixed in a substantially vertical direction by an optical sensor moving mechanism (not shown) provided with a driving mechanism such as a stepping motor. The operation of the optical sensor moving mechanism can be controlled by the control device 16 (not shown in FIG. 10).

  When performing stored object detection, the light source 1 emits light with one or both of the light source 1 and the optical sensor 2 moved to a predetermined position and fixed, and the stored object is detected by the optical sensor 2. Therefore, if the light source 1 and the optical sensor 2 according to the fourth embodiment are used for the storage object detection described in the first embodiment, the same effect as the first embodiment can be obtained, and the light source 1 and the optical sensor can be obtained. 2 can be reduced. That is, by changing the relative positions of the light source 1 and the optical sensor 2, a plurality of optical paths from the light source 1 to the optical sensor 2 can be provided, and without arranging a large number of the light sources 1 and the optical sensors 2, Items stored in various places can be detected.

Embodiment 5 FIG.
In the fifth embodiment, a configuration example of the light source 1 will be described. The light source 1 according to the fifth embodiment can be applied to the first to fourth embodiments described above. In the fifth embodiment, the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals.

FIG. 11 is a diagram illustrating the configuration of the light source 1, and is a schematic diagram when the light source 1 is viewed from the side. Solid line arrows P1 to P3 shown in FIG. 11 schematically represent the irradiation direction of light.
The light source 1 is a so-called bullet-type LED lamp in which an LED element 42 is mounted on a substrate 41 and covered with a lens 43. A feature is that the angle changing mechanism 44 is provided. The variable angle mechanism 44 is a mechanism that swings and rotates the entire bullet-type LED lamp at a predetermined angle to support and fix it, and corresponds to the rotation mechanism of the present invention. The irradiation direction of the light source 1 can be changed by changing the direction of the entire LED lamp by the variable angle mechanism 44.

  When performing stored object detection, the light source 1 emits light while swinging at a different angle, and the presence or absence of the stored object is detected by the optical sensor 2. Since the light source 1 is configured to be able to swing, a plurality of specific directions can be emitted, so that a plurality of optical paths to the optical sensor 2 can be provided. For this reason, if this light source 1 is used for the storage object detection of above-mentioned Embodiment 1, since the same effect as Embodiment 1 can be obtained, a plurality of optical paths can be obtained with one light source. The number of installed light sources 1 can be reduced.

In FIG. 11, the entire bullet-type LED lamp including the substrate 41, the LED element 42, and the lens 43 is configured to be able to swing integrally, but the angle of only the LED element 42 or only the lens 43 is changed. It is good also as a structure, and the same effect can be acquired.
In the fifth embodiment, a so-called bullet-type LED lamp has been described as an example. However, a so-called surface-mount type LED lamp may be used, or a light source of another light emitting method may be used.
Further, if the variable angle of the variable angle mechanism 44 and the swinging / supporting / fixing operation can be controlled by the control device 16, a plurality of optical paths can be formed by one light source 1. In this case, the angle changing mechanism 44 and the control device 16 correspond to the optical path forming means of the present invention.
In the fifth embodiment, a plurality of optical paths from the light source 1 to the optical sensor 2 are provided by making the light source 1 swingable. However, the optical sensor 2 may be swingable, and the same effect can be obtained. Can be obtained. Further, it may be rotated not only in the vertical direction like swinging, but also in the horizontal direction or oblique direction.

Embodiment 6 FIG.
In the sixth embodiment, a configuration example of the light source 1 will be described. The light source 1 according to the sixth embodiment is characterized in that the irradiation angle can be changed. The light source 1 described in the sixth embodiment is applicable to the first to fifth embodiments described above. In the sixth embodiment, the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals.

FIG. 12 is a diagram illustrating a configuration example of the light source 1, and is a schematic diagram when the light source 1 is viewed from the side. In FIG. 12, Q2 and Q3 which are shaded display schematically represent the irradiation angle of the light emitted from the light source 1.
The light source 1 is a so-called surface mount type LED lamp in which an LED element 42 is mounted on a substrate 41 and covered with a cover 45. The surface of the cover 45 is covered with a slit cover 46 made of a material that reflects or does not transmit light. The slit cover 46 has a slit 46a through which light can pass, and the width of the slit 46a can be changed. Further, a slit width changing mechanism 47 that changes the slit width of the slit cover 46 is provided. The slit width changing mechanism 47 switches the width of the slit 46a of the slit cover 46 to a predetermined width and fixes it, and corresponds to the irradiation angle changing mechanism of the present invention.

  In such a configuration, the light emitted from the LED element 42 has an irradiation angle as indicated by Q2 and Q3, and is irradiated to the outside through the slit 46a. When the width of the slit 46a is switched by the slit width changing mechanism 47, the irradiation angle of the light source 1 can be switched as indicated by Q2 and Q3.

  When the stored item is detected, the width of the slit 46 a is switched at a predetermined stage to cause the light source 1 to emit light, and the stored item is detected by the optical sensor 2. By switching the width of the slit 46a, the irradiation angle of the light emitted from the light source 1 can be changed. When the irradiation angle changes, the irradiation range also changes, so that the optical sensor 2 that can receive the light emitted from the light source 1 also changes. That is, the direction and the number of optical paths from the light source 1 to the optical sensor 2 can be switched by switching the width of the slit 46a. For this reason, if this light source 1 is used for the storage object detection described in the first embodiment, the same effect as in the first embodiment can be obtained, and the storage object is detected by the light from one light source 1. The possible range can also be switched.

The slit 46a is for limiting the irradiation angle, and the shape and width thereof can be appropriately selected according to the structure in the refrigerator compartment 10, the installation position of the light source 1, and the like. Further, instead of the slit 46a, a substantially circular diaphragm mechanism may be provided to limit the irradiation angle by switching the diameter of the diaphragm.
If the slit width changing mechanism 47 can be controlled by the control device 16, a plurality of optical paths can be formed by one light source 1. In this case, the slit width changing mechanism 47 and the control device 16 correspond to the optical path forming means of the present invention.

Embodiment 7 FIG.
In the seventh embodiment, a configuration example of the light source 1 will be described. The light source 1 according to the seventh embodiment can be irradiated in directions other than the front direction of the light source 1 and can be applied to the above-described first to sixth embodiments. In the seventh embodiment, the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals.

FIG. 13 is a diagram showing the configuration of the light source 1 in the refrigerating room 10d, and is a schematic view when the light source 1 is viewed from the side, showing a state where it is installed in the refrigerating room 10d. An arrow P4 and an arrow P5 shown in FIG. 13 schematically represent the light irradiation direction.
The light source 1 is a so-called surface mount type LED lamp in which an LED element 42 is mounted on a substrate 41 and covered with a cover 48. The surface of the cover 48 is made of a material that reflects or does not transmit light, and is covered with a slit cover 49 having a slit 49a. The light emitted from the LED element 42 is irradiated to the outside through the slit 49a. And the reflecting plate 50 which reflects the light irradiated from the slit 49a, and the angle changing mechanism 51 which switches and fixes the angle of the reflecting plate 50 are provided.

  When the stored object is detected, the light source 1 emits light with the reflection plate 50 fixed at a predetermined angle, and the optical sensor 2 detects the stored object. By switching the angle of the reflecting plate 50, it is possible to irradiate light in different directions as indicated by arrows P4 and P5. Therefore, when the angle of the reflecting plate 50 is set so that the irradiation direction becomes the arrow P4, an optical path to the optical sensor 2k can be formed, and when the irradiation direction is set to the arrow P5, the optical sensor 2j Can be formed. That is, light can be irradiated in a direction different from the irradiation direction of the LED element 42. Therefore, if the light source 1 according to the seventh embodiment is used for the storage object detection described in the first embodiment, the same effects as in the first embodiment can be obtained, and the installation positions of the light source 1 and the optical sensor 2 Can increase the degree of freedom.

For example, as shown in FIG. 13, the light source 1 is installed on the side wall side so that the irradiation direction of the LED element 42 is in the direction of the inside of the refrigerating chamber, and the optical sensor 2j and the optical sensor 2k are installed on the wall on the back side cold air passage 24 side. can do. Here, as described above in the first embodiment, it is desirable to install the light source 1 and the optical sensor 2 on the wall in the refrigerator compartment 10 in consideration of wiring. By enabling the irradiation direction to be switched as in the light source 1 according to the seventh embodiment, the light source 1 and the optical sensor 2 are provided on the wall, and proceed from the door 11 side of the refrigerating room 10 to the back side cold air passage 24 side. Such an optical path can be formed.
Furthermore, the angle changing mechanism 51 can be controlled by the control device 16 so that the angle of the reflecting plate 50 can be switched to provide a plurality of optical paths such as an optical path to the optical sensor 2j and an optical path to the optical sensor 2k in FIG. In this case, the angle changing mechanism 51 and the control device 16 correspond to the optical path forming means of the present invention.

  In the seventh embodiment, the light reflector 1 is provided with the light reflector 1, but a similar reflector may be provided for the optical sensor 2. The incident angle of the light to the optical sensor 2 is switched by changing the angle of the reflecting plate, and the position information of the stored item can be obtained based on the received light intensity of the optical sensor 2 at that time.

Embodiment 8 FIG.
In the eighth embodiment, a configuration example of the light source 1 will be described. The light source 1 described in the eighth embodiment can be applied to the first to seventh embodiments described above. Hereinafter, two configuration examples of the light source 1 will be described. In the eighth embodiment, the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals.

(First configuration example of the light source 1)
FIG. 14 is a diagram illustrating a configuration example of the light source 1, and is a schematic diagram when the light source 1 is viewed from the side. Solid arrows P6 to P8 shown in FIG. 14 schematically represent the light irradiation direction.
The light source 1 is a so-called surface mount type LED lamp in which an LED element 42 is mounted on a substrate 41 and covered with a cover 52. The cover 52 is made of a material that reflects or does not transmit light, and is provided with a hole 52a through which light passes and a mask portion 52b through which light does not pass. In this configuration example, the cover 52 having the hole 52a and the mask portion 52b corresponds to the light dividing portion of the present invention.

In such a configuration, the light emitted from the LED element 42 is irradiated to the outside through the hole 52a as indicated by arrows P6 to P8, but is not irradiated from the mask portion 52b. That is, by providing the hole 52 a in the cover 52, the light emitted from the LED element 42 is divided and irradiated from the light source 1 in a plurality of directions.
As described above, according to the first configuration example, since the hole 52a and the mask portion 52b that can specify the irradiation direction are provided, the LED element 42 can irradiate a plurality of specific directions while being a single light source. The light source 1 that can be obtained can be obtained. If only one hole 52a is provided, the light source 1 with high directivity can be obtained.

(Second configuration example of the light source 1)
FIG. 15 is a diagram illustrating a configuration example of the light source 1, and is a schematic diagram when the light source 1 is viewed from the side. Solid arrows P9 to P14 shown in FIG. 15 schematically represent the light irradiation direction.
The light source 1 is a so-called bullet-type LED lamp in which an LED element 42 is mounted on a substrate 41 and covered with a lens 53. The inside of the lens 53 may be encapsulated with resin or may be empty. The lens 53 has a predetermined cut, and has a flat portion 53a and a refracting portion 53b. In this configuration example, the lens 53 having the flat portion 53a and the refracting portion 53b corresponds to the light dividing portion of the present invention.

Here, the light has a property of being reflected at a portion having a high refractive index. For this reason, the light emitted from the LED element 42 is irradiated to the outside of the light source 1 only from the flat portion 53a as indicated by arrows P9 to P11. Of the light emitted from the LED element 42, the light hitting the refracting portion 53b is reflected into the lens 53 and reused as indicated by arrows P12 to P14.
As described above, according to the second configuration example, the lens 53 is cut to provide the flat portion 53a and the refracting portion 53b, so that the LED element 42 emits a plurality of specific directions while being a single light source. The light source 1 that can be obtained can be obtained. Moreover, if only one plane part 53a is provided, a highly directional light source can be obtained.

  It should be noted that a portion that is not desired to be irradiated, such as the side surface portion 53c of the lens 53, may be made of a material that reflects or does not transmit light, or may be coated with such a paint. Thereby, the irradiation amount to a specific direction can be increased.

  As described above, according to the light source 1 according to the first configuration example and the second configuration example described in the eighth embodiment, it is possible to irradiate a plurality of specific directions while being a single light source. Therefore, if the light source 1 according to the eighth embodiment is used for the storage object detection described in the first embodiment, the same effect as in the first embodiment can be obtained, and a plurality of optical paths to the optical sensor 2 are provided. It is possible to improve the accuracy of detection of stored items. Furthermore, since a plurality of optical paths can be formed with a single light source, the number of light sources 1 installed can be reduced. Moreover, if it comprises so that the irradiation direction may become one, the directivity of the light source 1 can be improved.

Embodiment 9 FIG.
In the ninth embodiment, an example of the above-described cooling control process of FIG. 4 (step S104 of FIG. 4) will be described. The circulation is delayed by determining the ease of circulation of the cold air in the refrigerator compartment. In some cases, processing is performed to eliminate it. The ninth embodiment can be used in combination with the first to eighth embodiments described above. In the ninth embodiment, the same or corresponding elements as those in the first embodiment are denoted by the same reference numerals.

  FIG. 16 is a diagram showing a configuration in the refrigerator compartment 10e. In FIG. 16, the light source 1 is distinguished from the light source 1 u to the light source 1 x, and the optical sensor 2 is distinguished from the optical sensor 2 m to the optical sensor 2 o. Moreover, the flow of the cold air in the refrigerator compartment 10e is notionally shown by the white arrows V and W1-W3.

  The refrigerator compartment 10e has one cold air outlet 25 between the ceiling and the shelf 15a and on the side wall on the rear cold air passage 24 side. Moreover, the inside stirring fan 4 is provided.

FIG. 16 (A) shows a state in which the stored item 18a is placed in front of the cold air outlet 25 and the circulation of the cold air to the entire interior is prevented. In FIG. 16A, many optical paths from the light source 1 to the optical sensor 2 are blocked by the storage items 18a to 18d stored in the cabinet, and the received light intensity of the optical sensor 2 is optical sensor 2m: 0, 2n: 0, 2o: 1.
Then, the cool air blown out from the cold air outlet 25 is prevented from circulating to the door 11 side by the stored item 18a, and as shown by the arrow V, it passes through the gap on the back side cold air passage 24 side in the refrigerator compartment 10 and the like. It flows in the direction and reaches the air temperature sensor 3. Thus, the cold air blown out from the cold air outlet 25 does not circulate in the refrigerator compartment 10 and reaches the air temperature sensor 3 as a shortcut. As a result, the air temperature sensor 3 detects the temperature of the cold air V that remains at a low temperature because the entire interior is not cooled. Since the air temperature sensor 3 detects the low temperature state as described above, the control device 16 that has acquired the detected value determines that the inside of the refrigerator compartment 10 has been sufficiently cooled and performs the cold air stop operation.
At this time, if the uncooled stored item 19 is stored on the door 11 side, the cold air does not spread and the cold air stop operation is performed. Therefore, the uncooled stored item 19 may be poorly cooled and the quality may be deteriorated. There is sex.
Therefore, in the ninth embodiment, the poor cooling state in the refrigerator compartment 10e is predicted based on the detection result of the stored items and the detected temperature of the air temperature sensor 3, and the inside of the refrigerator compartment 10 according to the poor cooling state. Cooling control is performed.

  FIG. 17 is a flowchart showing an example of the cooling control process, and describes the process of step S105 shown in FIG. 4 in more detail.

First, the detection result of the stored item is acquired, and it is determined whether the amount of stored item in the refrigerator compartment 10 is excessive (S121). If the stored items are not in an excessive state, a cooling control operation is performed according to the preset internal temperature (S122).
If the stored items are excessive, it is determined whether there are stored items near the cold air outlet 25 (S123). Whether there is a stored item near the cold air outlet 25 can be determined using, for example, the first configuration example of the third embodiment described above.

  If there is no stored item in the vicinity of the cold air outlet 25, cold air is blown out for a predetermined time (S124). The blowout of cool air here is for lowering the temperature in the refrigerating chamber 10 that has risen as the door 11 is opened in step S101 of FIG. 4, and the blowout time according to the opening time of the door 11 And the amount of cold air. Thereafter, the process proceeds to a cooling control operation corresponding to the preset internal temperature (S122).

If there is a stored item near the cold air outlet 25, it is determined whether or not the inside of the refrigerator compartment 10 is cooled to a predetermined temperature set based on the temperature detected by the air temperature sensor 3 (S125). . When the inside of the refrigerator compartment 10 is not cooled to a predetermined temperature, there is a possibility that the stored items are blocking the flow of the cold air. There is a risk of the contents being frozen.
Therefore, the cooling operation is performed in the freeze avoidance / energy saving operation mode (S127). In the freezing avoidance / energy saving operation mode, in order to avoid the freezing of the stored items in the vicinity of the cold air outlet 25, cool air of 0 degree or more is blown with an increased air volume, or cooling air is stopped and stirring in the cabinet is performed. The fan 4 is operated to circulate the cold air.

Here, the flow of the cold air in the refrigerator compartment during the cold air circulation by the internal stirring fan 4 is shown in FIG. When the internal stirring fan 4 is operated, the cold air blown out from the cold air outlet 25 is stirred, and a flow of cold air as shown by arrows W1, W2, and W3 in FIG. Thereby, cold air is circulated also to the door 11 side etc. in the refrigerator compartment 10, and a stored item can be cooled. The uncooled stored item 19 is also cooled by the cold air conveyed by the action of the internal stirring fan 4, and quality deterioration due to poor cooling is suppressed.
Here, the internal stirring fan 4 may be in any form as long as it can transport air. Moreover, also about the installation position of the stirring fan 4 in a store | warehouse | chamber, the location where the stirring effect is acquired can be arbitrarily defined according to the structure of the refrigerator compartment 10, etc.

On the other hand, when the inside of the refrigerator compartment 10 is cooled to a predetermined temperature in step S125 of FIG. 17, it is determined whether or not the cold air is in a short cycle (S126). Specifically, for example, cold air is blown intermittently from the cold air outlet 25, and the blown cold air is supplied to the air temperature sensor 3 within a predetermined time based on the time constant of the change in the value of the air temperature sensor 3 at this time. Determine if it has reached. When the blown-out cold air reaches the air temperature sensor 3 within a predetermined time, it can be determined that the cold air has not spread throughout the refrigerator compartment 10.
If the cold air is not short cycled (No in step S126), it can be said that the flow of the cold air is secured in the refrigerator compartment 10e even if there are many items to be stored, so the cooling control operation according to the internal temperature is performed. (S122).
If the cold air is in a short cycle (Yes in step S126), the stored item near the cold air outlet 25 may freeze, so the cooling operation is performed in the freeze avoidance / energy saving operation mode (S127).
Then, the processing from step S125 to step S127 is repeated for a predetermined time (S128).

Here, in the operation in the freezing avoidance / energy saving operation mode, the cooling capacity itself is lower than that in a normal cooling control operation in which cold air is introduced. Therefore, if the refrigerator compartment is not cooled to the predetermined temperature even if the operation in the freeze avoidance / energy saving operation mode is continued for a predetermined time or longer (S128), a failure determination of the cooling mechanism 20 is performed (S129).
If there is a failure, the failure is notified to the user using the front panel 12 of the refrigerator 100 (S130). If it is not a failure, it is determined that a cooling failure has occurred because there are too many items stored in the refrigerator compartment 10, and the front panel 12 is used to notify the user that it is overpacked (S131).

  If it is determined in step S121 in FIG. 17 that the amount of stored items is not excessive (small), a cooling control operation is performed in accordance with the internal temperature in step S122. However, when the amount of stored items is small, energy saving operation with reduced cooling performance may be performed.

  As described above, according to the ninth embodiment, the ease of circulation of the cold air in the refrigerator compartment 10e is determined, and the cooling control is performed based on the result and the detection result of the stored items. For this reason, when the cold air is in a short cycle, the cooling operation can be performed in the freeze avoidance / energy saving operation mode. In the freezing avoidance / energy saving operation mode, the cold air temperature is raised or the cold air blowing is stopped, so that the stored items near the cold air outlet 25 can be prevented from freezing due to excessive cooling. Further, since the cool air circulation is performed by operating the internal stirring fan 4, the short cycle of the cool air can be eliminated. Furthermore, when it is determined that the cold air is short-cycled, the front panel 12 notifies the user, so that the user can be inspected. In this way, the cooling operation control and notification to the user can be performed based on the detection result of the stored item and the circulation state of the cold air, so the deterioration of the storage quality of the stored item due to poor cooling can be reduced, and it is discarded wastefully Stored items such as food can be reduced.

Embodiment 10 FIG.
The tenth embodiment relates to a modification of the light source 1 described in the first embodiment, and the light source described here will be referred to as a light source 1y.
The light source 1y irradiates light including visible light, and is also used as an interior illumination light source for visually recognizing stored items in the refrigerator compartment 10. That is, when operating in the interior viewing illumination mode (S106) in FIG. 4, the stored object detection light source 1y is turned on.
The light source 1 y is arranged approximately on the door 11 side and directs its irradiation direction toward the rear cold air passage 24. And in order to be able to receive the light irradiated from the light source 1y, the light-receiving part of the optical sensor 2 is orient | assigned to the door 11 side in general. Thereby, an optical path from the light source 1y to the optical sensor 2 can be formed. Then, the stored items can be detected as described in the first embodiment.

  As described above, according to the tenth embodiment, the light source 1y used for the detection of the stored item is configured so as to be able to irradiate light including visible light. Therefore, the light source 1y can be used for illuminating the stored item in the refrigerator compartment. It can be used as a light source. Therefore, it is possible to use both the light source for detecting stored items and the light source for interior illumination, and the number of parts can be reduced.

  In addition, in the said Embodiment 1- Embodiment 10, although the case where this invention was applied to the refrigerator compartment 10 was demonstrated to the example, in various warehouse rooms in refrigerators, such as a chilled room, a freezer compartment, and a vegetable compartment, The present invention can be applied.

  DESCRIPTION OF SYMBOLS 1 Light source, 2 light sensor, 3 air temperature sensor, 4 stirring fan, 5a reflector, 5b reflector, 10 refrigerator compartment, 11 door, 12 front panel, 13 door opening / closing detection switch, 14 door pocket, 15 shelf, 15a shelf, 15b shelf, 16 control device, 18 storage items, 19 storage items, 20 cooling mechanism, 21 compressor, 22 heat exchanger, 23 cold air blower fan, 24 back cold air passage, 25 cold air outlet, 26 air outlet cover, 30 switching room, 31 drawer door, 32 vegetable room, 33 drawer door, 34 freezing room, 35 drawer door, 41 substrate, 42 LED element, 43 lens, 44 angle changing mechanism, 45 cover, 46 slit cover, 46a slit, 47 Slit width changing mechanism, 48 cover, 49 slit cover, 49a slit, 50 reflector, 1 bending mechanism, 52 cover, 52a hole, 52b mask portion, 53 lens, 53a flat portion, 53b refractive portion, 53c side portion 100 refrigerator.

Claims (5)

A chamber with a door that can be opened and closed;
A cooling mechanism for cooling the inner chamber;
A light source unit for irradiating light into the interior of the cabinet;
An optical sensor unit capable of receiving light emitted from the light source unit;
A control unit that irradiates light to the light source unit and controls the cooling capacity of the interior of the cabinet based on the amount of light received by the optical sensor unit;
The controller is
When the amount of light received by the optical sensor unit is smaller than a predetermined amount of received light, at least one of increasing the amount of cool air introduced into the interior chamber, decreasing the cool air temperature, and stirring the interior air A refrigerator characterized by cooling control. The controller is
2. The refrigerator according to claim 1, wherein when the amount of light received by the optical sensor unit is larger than a predetermined amount of received light, cooling control is performed to reduce the amount of cool air introduced into the internal chamber. A chamber with a door that can be opened and closed;
A cooling mechanism for cooling the inner chamber;
A door open / close detection unit for detecting the open / closed state of the door;
A light source unit for irradiating light into the interior of the cabinet;
An optical sensor unit capable of receiving light emitted from the light source unit;
A control unit that irradiates light to the light source unit and controls the cooling capacity of the interior of the cabinet based on the amount of light received by the optical sensor unit;
The controller is
When the door opening / closing detection unit detects an open state of the door, the light source unit blinks. The controller is
The light source unit is blinked when the door opening / closing detection unit detects an open state of the door and the light reception amount of the optical sensor unit is smaller than a predetermined light reception amount. Refrigerator. The controller is
When the door open / close detection unit detects an open state of the door and the cooling mechanism fails, the illumination intensity of the light source unit or the blinking cycle of the light source unit is different from that before the cooling mechanism fails. The refrigerator according to claim 3 or 4, wherein the light source unit is controlled to do so.

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