CN103443566B - Freezer - Google Patents

Abstract

The present invention provides a kind of freezer, comprising: divided by thermal wall and insulated door, and the receiving room of storage storage thing；It is arranged on the light source of the inside of receiving room；Detect the optical sensor (21) irradiating light irradiating from light source；With the calculation control unit (1) that testing result based on optical sensor (21) carries out calculation process.Calculation control unit (1) has: attenuation rate operational part (81), it, based on the benchmark receiving room illumination under the state not receiving thing in receiving room and the detection illumination of optical sensor (21), carries out computing to the attenuation rate relative to benchmark receiving room illumination under the state being accommodated with storage thing；With receiving state presumption unit (82), the storage amount of its operation result based on attenuation rate operational part (81) presumption storage thing.

Description

Freezer

Technical field

The present invention relates to the freezer possessing the unit of the receiving state of the storage thing in detection case.

Background technology

In home-use freezer in recent years, fan is usually used to make cold air follow in freezer The indirect type of cooling of ring.Existing freezer is adjusted by the testing result according to the temperature inside the box Control temperature, the temperature in case is remained proper temperature.

Such as, as the freezer keeping the temperature inside the box equably, it is known to be provided with movable The freezer (for example, referring to patent documentation 1) of air-conditioning exhaust unit.

Figure 26 is the front elevation of the internal structure of the cold room 101 representing existing freezer 500.

As shown in figure 26, in freezer 500, be arranged in cold room 101 is movable cold Gas discharger 102 cool-air feed to the left and right.Hereby it is achieved that the homogenization of the temperature inside the box.This Plant freezer 500 and speculate temperature by the critesistor in case.

But, in this existing freezer, do not consider that thing received by the food etc. received Amount and the receiving state of so-called configuration.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 8-247608 publication

Summary of the invention

The present invention completes in view of above-mentioned existing problem, it is provided that one can be with freezer The freezer of the cooling that the internal receiving state receiving thing is corresponding.

The freezer of the present invention possesses: divided by thermal wall and insulated door, the receipts of storage storage thing Receive room；It is arranged on the light source of the inside of receiving room；Detect the light irradiating light irradiating from light source Sensor；With the calculation control unit that testing result based on optical sensor carries out calculation process.Fortune Calculate control portion to have: attenuation rate operational part, it is based under the state not receiving thing in receiving room Benchmark receiving room illumination and the detection illumination of optical sensor, computing be accommodated with storage thing state Under the attenuation rate from benchmark receiving room illumination；With receiving state presumption unit, it is based on decay The storage amount of the operation result presumption storage thing of rate operational part.

Accompanying drawing explanation

Fig. 1 is the front elevation of the freezer of the 1st embodiment of the present invention.

Fig. 2 is the control block diagram of the freezer of the 1st embodiment of the present invention.

Fig. 3 A is the 3A-3A sectional view of Fig. 1 of the freezer of the 1st embodiment of the present invention.

Fig. 3 B is that the refrigerating-chamber door of the cold room of the freezer of the 1st embodiment of the present invention is opened Time front elevation.

Fig. 4 is detecting as receiving state of the freezer of the 1st embodiment representing the present invention The figure of the optical sensor in portion, illumination and output electric current characteristic.

Fig. 5 is storage rate and the optical sensor of the freezer by the 1st embodiment of the present invention The performance plot that the relation of illumination is represented by the reflectance in chamber interior wall face.

Fig. 6 is storage rate and the optical sensor of the freezer by the 1st embodiment of the present invention The performance plot that the relation of illumination is represented by the transmitance of accepting rack in case.

Fig. 7 A is the dynamic of the receiving state of the freezer of the 1st embodiment representing the detection present invention The flow chart of the control flow made.

Fig. 7 B is the dynamic of the receiving state of the freezer of the 1st embodiment representing the detection present invention The flow chart of the control flow made.

Fig. 8 is the end face LED for illustrating to use the freezer of the 1st embodiment of the present invention The figure of the action of detection receiving state.

Fig. 9 is the end face LED detection of the freezer representing the 1st embodiment using the present invention The figure of characteristic during receiving state.

Figure 10 is below the side of the freezer of the 1st embodiment for the use present invention is described The figure of the action of LED detection receiving state.

Figure 11 is LED below the side of the freezer representing the 1st embodiment using the present invention The figure of characteristic during detection receiving state.

Figure 12 is to represent freezer by the 1st embodiment of the present invention, Fig. 9 and Figure 11 The value of shown characteristic make average obtained by the figure of characteristic.

Figure 13 is that the key light sensor of the freezer of the 1st embodiment for the present invention is described is attached The figure of near storage example.

Figure 14 is that the key light sensor of the freezer of the 1st embodiment for the present invention is described is attached The figure of the example that the error that near storage thing causes produces.

Figure 15 is the key light sensor proximity of the freezer of the 1st embodiment representing the present invention The figure of receiving state detection characteristic.

Figure 16 is that the key light sensor of the freezer of the 1st embodiment for the present invention is described is attached The figure of the storage example of near reverberation.

Figure 17 is that the key light sensor of the freezer of the 1st embodiment for the present invention is described is attached The error that near reverberation causes produces the figure of example.

Figure 18 A is wavelength and the reflection of the light of the freezer of the 1st embodiment representing the present invention The figure of the relation of rate.

Figure 18 B is wavelength and the reflection of the light of the freezer of the 1st embodiment representing the present invention The figure of the relation of rate.

Figure 18 C is wavelength and the reflection of the light of the freezer of the 1st embodiment representing the present invention The figure of the relation of rate.

Figure 19 is the key light sensor proximity of the freezer of the 1st embodiment representing the present invention The figure of reverberation detection characteristic.

Figure 20 is the receiving state detection characteristic after the correction calculating of the 1st embodiment of the present invention Figure.

Figure 21 is the sectional view of the side viewing of the freezer of the 2nd embodiment from the present invention.

Figure 22 is for illustrating in the cold room of the freezer of the 2nd embodiment of the present invention Face is accommodated with the figure of the state of storage thing.

Figure 23 A is viewed from above the optical sensor of the freezer of the 2nd embodiment of the present invention The sectional view of configuration example.

Figure 23 B is viewed from above the optical sensor of the freezer of the 2nd embodiment of the present invention The sectional view of configuration example.

Figure 24 A is the optical sensor of the freezer of the 2nd embodiment from the side viewing present invention The sectional view of configuration example.

Figure 24 B is the optical sensor of the freezer of the 2nd embodiment from the side viewing present invention The sectional view of configuration example.

Light in the wind path of the freezer that Figure 25 is viewed from above the 2nd embodiment of the present invention The sectional view of the configuration example of sensor.

Figure 26 is the front elevation of the internal structure of the cold room representing existing freezer.

Detailed description of the invention

Hereinafter, referring to the drawings embodiments of the present invention are illustrated.Wherein the present invention does not limits Due to these embodiments.

(the 1st embodiment)

Hereinafter, the 1st embodiment of accompanying drawing based on Fig. 1 to Figure 20 explanation present invention.

Fig. 1 is the front elevation of the freezer 100 of the 1st embodiment of the present invention.Fig. 2 is this The control block diagram of freezer 100.Fig. 3 A is the 3A-3A cross section of Fig. 1 of this freezer 100 Figure.Fig. 3 B is the front during refrigerating-chamber door 12a of the cold room 12 opening this freezer 100 Figure.

As shown in Fig. 1, Fig. 3 A and Fig. 3 B, freezer 100 possesses freezer main body 11.Cold Hiding storehouse main body 11 is heat insulating box, including the outer container mainly using steel plate；By resins such as ABS The interior case of molding；And the heat-barrier material being injected between outer container and interior case.

As it is shown in figure 1, freezer main body 11 is divided into multiple receiving room by thermal wall and insulated door. Specifically, the topmost in freezer main body 11 is configured with cold room 12.It addition, in cold preservation The lower, transverse of room 12 is set side by side with ice-making compartment 13 and switching chamber 14.At ice-making compartment 13 with cut The bottom changing room 14 is provided with refrigerating chamber 15.Foot and freezing in freezer main body 11 The bottom of room 15 is configured with vegetable compartment 16.

In the front surface of each receiving room, for being each formed in the insulated door of extraneous air division The front surface peristome of freezer main body 11.Refrigerating-chamber door 12a is the insulated door of cold room 12. Being configured with display part 17 near the central part of refrigerating-chamber door 12a, this display part 17 can be carried out The temperature inside the box of each receiving room sets, ice making and the setting of cooling etc. rapidly and be used for showing storage The testing result of state, the operational situation etc. of freezer 100.

As in figure 2 it is shown, freezer 100 possesses: be arranged on the conduct light of the inside of cold room 12 The case intraoral illumination 20 in source；Detect the optical sensor 21 irradiating light irradiated from light source and pass based on light The testing result of sensor 21 carries out the calculation control unit 1 of calculation process.Freezer 100 also has Blue led 22a, 22b.

Calculation control unit 1 possesses: based on base when not receiving thing in cold room 12 Quasi-receiving room illumination and the detection illumination of optical sensor 21, to the phase being accommodated with under storage thing state Attenuation rate for benchmark receiving room illumination carries out the attenuation rate operational part 81 of computing；With based on declining The receiving state presumption unit 82 of the storage amount of the operation result presumption storage thing of lapse rate operational part 81.

Freezer 100 also has the conduct door opening and closing test section of the opening and closing of detection refrigerating-chamber door 12a Door open-close detection sensor 3.

Case intraoral illumination 20 has end face LED20a, 20b, illuminating LED 20c～20f and side Lower section LED20g, 20h.

Calculation control unit 1 is also equipped with memorizer 2 and timer 4.

Optical sensor 21 has key light sensor 21a, 21c and secondary optical sensor 21b.

Freezer 100 has cooling system 35.Cooling system 35 has compressor 30, cooling Fan 31 and air quantity damper 32.

As shown in Figure 3 A and Figure 3 B, can arrange and receive as storage in cold room 12 The mode of the food of thing is provided with accepting rack 18 in multiple case.It addition, refrigerating-chamber door 12a's Face inside case is provided with an accepting rack 19.In case, accepting rack 18 and door accepting rack 19 are by glass Or transparent resin etc., material that light transmission rate is high are constituted.

In case, the surface of accepting rack 18 and door accepting rack 19 is processed, so that keeping certain Transmitance and make light spread.Thereby, it is possible to the lightness distribution in regulation cold room 12. Transmitance now is expected to more than 50%, when transmitance is less than 50%, there is light in case It is difficult to the position arrived, so the accuracy of detection of receiving state may reduce.Additionally, in practicality Upper expectation makes in case the transmitance of accepting rack 18 and door accepting rack 19 more than 70%.About this Reason is stated later.

As shown in Fig. 2, Fig. 3 A and Fig. 3 B, it is internally provided with case intraoral illumination at cold room 12 20, for illuminating in the case in receiving room.Thus, the conduct storage received is improved The being visually confirmed to be property of the food etc. of thing.

As shown in Figure 3A, case intraoral illumination 20 is arranged in, the door opening side in freezer 100 Front surface (front) viewing, than the 1/2(center of depth in case) more by door side (side, front) Position.

As shown in Figure 3 B, case intraoral illumination 20 is arranged respectively at end face, left side wall and right side wall Face.Specifically, as case intraoral illumination 20, end face uses end face LED20a, 20b, right side Wall and left side wall each use below illuminating LED 20c～20f and side Multiple LED such as LED20g, 20h.Thus, the light of high luminosity incides optical sensor 21, institute So that the detection sensitivity of receiving state based on optical sensor 21 can be improved.It addition, make to be positioned at Multiple LED of diverse location light successively, and the LED, the light that because of receiving state and are lit sense The detected value of device 21 changes, and it is possible to estimate in further detail receiving state.It addition, The LED of case intraoral illumination 20 is arranged in the inside of cold room 12 more top than optical sensor 21 The position of side.

In side wall surface, LED20g such as Fig. 3 A below illuminating LED 20c～20f and side Arrange in the vertical shown in Fig. 3 B.Thereby, it is possible to exhaustive to be radiated at short transverse ratio wide The cold room 12 of degree direction length is overall.

Lower section in case and the 1/2(center than the depth direction in case) more by refrigerating-chamber door 12a The position of side, is provided with key light sensor 21a, 21c as optical sensor 21 and secondary light passes Sensor 21b.Thereby, it is possible to accurately detection is easily subject to what the extraneous air that an opening and closing causes flowed into The receiving state of the storage thing of the food etc. of the entrance of impact, remaining in case suitably Temperature it is controlled.

As optical sensor 21, in the present embodiment, illuminance transducer, specifically use Become the sensor that peak wavelength is 500～600nm of maximum sensitivity.Additionally, these light passes The peak wavelength as maximum sensitivity of sensor can be other wave band, can detect top LED20g, 20h and the light of blue led 22a, 22b below face LED20a, 20b, side The mode of the emission wavelength etc. in source determines.

In Fig. 3 B, it is assumed that when cold room 12 is divided into Two Areas in the lateral direction, top Face LED20a and key light sensor 21c is arranged in the right right region.It addition, end face LED20b, key light sensor 21a and secondary optical sensor 21b are arranged in left region back to left.Separately Outward, it is assumed that when cold room 12 is divided into Two Areas in the vertical direction, end face LED20a, 20b is arranged in region.It addition, LED20g below side, 20h, key light sensor 21a, 21c and secondary optical sensor 21b is arranged in lower region.So, it is configured with composition in multiple regions to receive Receive the LED of state detecting section and optical sensor 21.The detection illumination of optical sensor 21 is to comprise The reflection light of the wall in cold room 12 and storage thing, detection indirectly irradiate the illumination of light.

Below end face LED20a, 20b or side, the irradiation light of LED20g, 20h is repeated The reflection of cold room 12 wall and the reflection of storage thing and decay, key light sensor 21a, 21c The illumination being distributed saturated state of the lightness in mensuration cold room 12.Calculation control unit 1 makes By the measured value of key light sensor 21a, 21c, carry out the storage shape of calculation process presumption storage thing State.In the present embodiment, as it has been described above, be configured with LED and optical sensor in multiple regions 21, it is possible to detect receiving state well with the configuration independently precision of storage thing.

Additionally, expect that in reality application the reflectance of the wall of cold room 12 is more than 0.5. It addition, as it has been described above, expect accepting rack 18 and door accepting rack 19 in case in reality application Transmitance each comfortable more than 70%.Reason following description about these.

Fig. 4 is the receiving state constituting freezer 100 of the 1st embodiment representing the present invention The figure of the optical sensor 21 of test section, illumination and output electric current characteristic.Fig. 5 is by case The reflectance of wall represents the storage rate of this freezer 100 and the relation of the illumination of optical sensor 21 Performance plot.Fig. 6 is the storage representing this freezer 100 by the transmitance of accepting rack in case 18 The performance plot of the relation of the illumination of rate and optical sensor 21.Wherein, the illumination of optical sensor 21 Can export with current value or magnitude of voltage (following, illustrate with current value, but can put It is changed to magnitude of voltage).

Constitute the interior case of inwall of the cold room 12 of freezer 100 by the ABS tree by white Fat vacuum forming and formed, make the reflectance R in chamber interior wall face more than 0.5.

Additionally, reflectance R is with relative to the light beam being incident to certain face, the light beam that reflects in this face Ratio definition, it may be said that numerical value is the biggest more easily reflects.Mensuration can be by commercially available light splitting Photometer is carried out.There is also can measure the equipment of transmitance T with reflectance R simultaneously.It addition, In Japanese Industrial Standards, there are the mensuration of reflectance R, test in middle regulations such as JIS-K3106 Method.It addition, reflectance R uses luminance meter to measure, reflectance also is able to known to basis adopt The brightness presumption of sample (gray scale (Grayscale)).

Transmitance T is the incident illumination ratio by sample of specific wavelength, it may be said that numerical value is the biggest, Light more readily penetrates through.About transmitance T, there are mensuration, test in middle regulations such as JIS-K7361-1 Method.In the case of the inside being arranged in the cold room 12 of freezer 100, accepting rack 18 is by polyphenyl Ethylene or glass are formed, and door accepting rack 19 is formed by polystyrene.And, accepting rack 18 in case With transmitance T of door accepting rack 19 each comfortable more than 70%.As long as additionally, on transmitance is satisfied The relation stated, material is not limited to these examples.

As shown in Figure 4, key light sensor 21a, 21c illumination and now output current value tool Having the relation of straight line, illumination is the highest, and output current value becomes the biggest.On the other hand, illumination is worked as When diminishing, output current value also diminishes.Illumination is below setting, in the receipts of present embodiment Receive in state detecting section when being below 0.5 lux, lose and export the relation of the straight line of electric current. Output current value now, is 0.1 μ A in the receiving state test section of present embodiment, but root Specification according to receiving state test section is different, and illumination is different with the relation of output current value.Detection The sensor of illumination, near 1 lux, following precision reduces, but in the present embodiment, false The reasonable optical sensor of qualitative energy 21, uses with more than 0.5 lux necessary for minimum Illumination.

Thus, calculation control unit 1 has the illumination of optical sensor 21 and the straight of output current value The storage rate of more than setting (0.5 lux) of the relation of line presumption storage thing, it is possible to Improve the presumption precision of storage rate.

That is, the storage rate presumption of storage thing does not use the illumination of optical sensor 21 not have straight line The scope of relation, it is possible to improve the presumption precision of storage rate, and at optical sensor 21 is In the case of specifying that output valve (0.5 lux) is below, it is also possible to for fault diagnosis.

As it has been described above, be 0.1 μ A when minimal illumination being scaled output current value.That is, this reality Execute in mode, make the minimum output electric current of key light sensor 21a, 21c at 0.1 more than μ A.By This, from the viewpoint of minimum output electric current, illumination based on key light sensor 21a, 21c declines Decrement can improve the presumption precision of the receiving state of storage thing.

It addition, as it is shown in figure 5, when the light quantity making light source necessarily improves the storage thing in case During storage rate, the illumination of key light sensor 21a, 21c declines.And, there is chamber interior wall face In reflectance R(Fig. 5, R=0.3,0.5,0.7) the lowest, the key light sensing of same storage rate The tendency that the illumination of device 21a, 21c more declines.This is because the part from the light of light source exists The reflection of chamber interior wall face arrives key light sensor 21a, 21c, also as the reflectance R in chamber interior wall face The lowest, the light quantity arriving key light sensor 21a, 21c more declines.

Additionally, sometimes arrange, in chamber interior wall face, the design part etc. that reflectance is low partly, but arrive The light quantity reaching key light sensor 21a, 21c depends on the reflectance R in the big chamber interior wall face of area.

It addition, as it has been described above, need to avoid the accuracy of detection unstable region of optical sensor 21 DNG detects receiving state.The minimal illumination of key light sensor 21a, 21c needs 0.5 lux Above, utilize the relation shown in Fig. 5 to understand, need the reflectance R making chamber interior wall face 0.5 Above.

Here, for the light income increasing optical sensor 21, it may be considered that improve the light quantity of light source. It is, however, possible to because consuming the rising of electric power, the heating of light source results in the upper of the temperature inside the box Rise, likely when and detect with illumination functions and receiving state light source time user feel dizzy Dizzy, the being visually confirmed to be property deterioration of food.Therefore, the light quantity at will improving light source is not very wise move. Therefore, in the present embodiment, light source is empty state in case and opens refrigerating-chamber door 12a State under when measuring illumination in darkroom, adjust LED so that in case on accepting rack 18 The position becoming minimal illumination is below 100 luxs.So-called illumination 100 lux now Hereinafter, it is the lightness from the viewing of user side, specifically, is to make general illumination meter The highest axle of detecting part medium sensitivity and accepting rack 18 level in case and towards refrigerating-chamber door 12a side The illumination arranged and measure.

It addition, in the present embodiment, as the light source of case intraoral illumination 20, it is considered to in case Heat affecting, uses each the luminosity LED below 20 candelas.

Herein it is assumed that use special light source structure at the illumination functions of not dual-purpose case intraoral illumination 20 In the case of becoming the LED as receiving state test section, the LED's of receiving state test section Luminosity is than relatively low situation.In this case it is necessary to the reflectance R in making case enters than 0.5 One step improves.

It addition, as shown in Figure 6, there is accepting rack 18 and the transmitance of door accepting rack 19 in case (in Fig. 6,30%, 60%, 90%) becomes the optical sensor 21 of storage rate the lowest, same The tendency that more declines of illumination.In the present embodiment, accepting rack 18 and door accepting rack in case is made The transmitance each comfortable more than 70% of 19, it is possible to illumination attenuation based on optical sensor 21 is true Protect the presumption precision of the receiving state of storage thing.

As using optical sensor 21 to detect the mode of object, the mode of such as photo interrupter, Use commonplace by covering the method for the phenomenon making the intensity of light extremely decay.According to the party Formula, it is possible to use an optical sensor 21 with the existence of digital one object of detection, it is possible to profit With the existence using the multiple object of multiple light sensors.But, using this structure In the case of, the presence or absence of the storage thing of limited portions in receiving room can only be detected, it is difficult to hold and receive Receive the overall receiving state in room.But, according to the freezer 100 of present embodiment, use a small amount of The optical sensor 21 of LED, it is possible to it is overall that simulation ground is held in the space of cold room 12 Receiving state, i.e. can not only hold the presence or absence of storage thing, and also be able to determine for its quantity Amount ground is held.That is, the structure of the freezer 100 of present embodiment, it is adaptable to be positioned at closing sky The detection of the entire amount of interior storage thing.

Optical sensor 21 is being used to detect in the mode of object, near optical sensor 21, In front of i.e. positive during stored object blocking, extremely reduce with the grade that can detect light, light strong The rate of change of degree reduces.It is therefore contemplated that the detection of receiving state needs complicated process.

But, in the present embodiment, as shown in Figure 3A, end face LED20a, 20b, illumination Install with LED20g, 20h below LED20c～20f, side and key light sensor 21a, 21c Space alpha between accepting rack 18 and door accepting rack 19 in case.Therefore, though cold room 12 The most such as when stored object fills up, the probability that the vicinity of optical sensor 21 is filled up by food is relatively low. Thus, in insulated door and case, upper and lower space stored object between the front end of accepting rack 18 is covered Probability low, it can be ensured that from the stable light path of light source, and can receive based on door The illumination decay of the optical sensor 21 that the existence of the storage thing of accepting rack 18 causes in frame 19, case Accuracy of measurement estimates the receiving state of storage thing well.

It addition, key light sensor 21a, 21b are arranged on than comprising the front of accepting rack 18 in case The vertical guide side closer to the front of the end of side and cold with comprise as insulated door in this plummet face Between the vertical guide of the end hiding the rear side of room door 12a.And then expectation, key light sensor 21a, 21b is arranged on more closer to the front than comprising the vertical guide of the end of the front side of accepting rack 18 in case Side and in the end in this plummet face with the rear side comprising the refrigerating-chamber door 12a as insulated door Vertical guide between, be not related to (touching extension) to part α of door accepting rack 19.Thus, at case Existential Space between interior accepting rack 18 and door accepting rack 19, it is possible to prevent from constituting storage shape Key light sensor 21a, 21c stored object blocking of state test section.

Return Fig. 3 A, in the Machine Room that the rear area of the topmost in cold room 12 is formed It is accommodated with the constituting portion comprising compressor 30, carrying out the kind of refrigeration cycle of the exsiccator etc. of moisture removing Part.

The cooling chamber generating cold air it is provided with at the back side of refrigerating chamber 15.It is configured with in cooling chamber Cooler and using cooled down by cooler as cooling way cold air blow to cold room 12, Cooling fan 31(Fig. 2 of switching chamber 14, ice-making compartment 13, vegetable compartment 16 and refrigerating chamber 15 Reference).Further, in wind path, it is provided with the air quantity regulated from the air quantity of cooling fan 31 to adjust Joint air door 32(is with reference to Fig. 2).It addition, in order to remove be attached to cooler and periphery thereof frost, Ice, is configured with pharoid, drain pan and drain pipe evaporating pan etc..

Calculation control unit 1, in order to carry out stored refrigerated, and carries out not freezing to cold room 12 The temperature that temperature is lower limit control (usual 1 DEG C～5 DEG C).Calculation control unit 1 is by vegetable compartment 16 temperature control for the temperature identical or the highest with cold room 12 set (such as 2 DEG C～ 7 DEG C).Calculation control unit 1 refrigerating chamber 15 is set as cryogenic temperature territory (generally-22 DEG C～ -15 DEG C), but in order to improve freezen protective state, the most such as, it is set as-30 DEG C ,-25 DEG C Low temperature.

Ice-making compartment 13 utilizes the water that the water storage tank in cold room 12 is sent here, is being disposed in the interior The automatic ice maker ice making on top, and it is stored at being arranged in the ice storage container of indoor bottom.

Switching chamber 14 is except the setting (vegetable) of setting (cold preservation), 2 DEG C～7 DEG C of 1 DEG C～5 DEG C Beyond the temperature field of the setting of-22 DEG C～-15 DEG C (freezing), it is possible to switch to from refrigerated storage temperature Between territory to cryogenic temperature territory, predetermined temperature territory.Switching chamber 14 is and ice-making compartment 13 The receiving room possessing unconnected gate being set up in parallel, such as, possess the door of drawer type.

Additionally, in the present embodiment, make switching chamber 14 for comprising from refrigerated storage temperature territory The receiving room adjusted to the temperature field in cryogenic temperature territory.But, switching chamber 14 is not limited to this structure, Also be able to for cold preservation is given cold room 12 or vegetable compartment 16, freezing is given refrigerating chamber 15, Thus the storage of the switching specifically for the temperature field between refrigerated storage temperature territory and cryogenic temperature territory Room.It addition, become many, also with the needs of specific temperature field, the most in recent years frozen food Can make switching chamber 14 is to be fixed on the receiving room of freezing setting.

About freezer 100 configured as described above, its action of following description and effect.

In the present embodiment, end face LED20a, the 20b in case intraoral illumination 20 and side are used Below face, LED20g, 20h detect the receiving state of storage thing.It addition, in present embodiment In, use the key light sensor 21a in optical sensor 21 and secondary optical sensor 21b to detect receipts Receive state.

Additionally, when needing the accuracy of detection improving the receiving state of storage thing further, permissible Use illuminating LED 20c～20f as receiving state test section etc., increase the LED light used The quantity in source.It addition, use key light sensor 21c etc. as receiving state test section, increase The quantity of the optical sensor 21 used, it is also possible to improve accuracy of detection.

Hereinafter, use Fig. 7 A～Figure 12, to using below end face LED20a, 20b, side LED20g, 20h, key light sensor 21a, the storage shape of secondary optical sensor 21b detection storage thing The action of state is described in detail.

Fig. 7 A and Fig. 7 B is the detection freezer 100 of the 1st embodiment representing the present invention The flow chart of the control flow of the action of receiving state.Fig. 8 is for using this freezer 100 The figure that illustrates of action of detection receiving state of end face LED20a, 20b.Fig. 9 is table Show the figure of characteristic when using end face LED20a, 20b of this freezer 100 to detect receiving state. Figure 10 is for using LED20g below the side of this freezer 100 to detect receiving state The figure that action illustrates.Figure 11 is LED20g below the side representing and using this freezer 100 The figure of characteristic during detection receiving state.Figure 12 be represent by this freezer 100, Fig. 9 and The value of the characteristic shown in Figure 11 make average obtained by the figure of characteristic.

Cold room 12 is general compared with its width, grows (elongate shape) in the height direction. Therefore, mainly illustrate to be divided into cold room 12 upper and lower two regions, the example of detection receiving state Son.

As shown in Figure 7 A, detect refrigerating-chamber door 12a's first with door open-close detection sensor 3 Opening and closing (S101).When detecting that door becomes closed state in the case of (when being closed), computing Control portion 1 it is determined that the probability putting into releasing of storage thing, starts calculation process.

It addition, calculation control unit 1 starts with timer 4 being closed from refrigerating-chamber door 12a After the timing stipulated time (S102), it is also possible to start the detection action (basic number of receiving state According to acquirement action).In this case, calculation control unit 1 utilizes door open-close detection sensor 3 to examine Survey the closed state of insulated door, and after have passed through the stipulated time, start to control.

Here, in step S102, reason (the standby rule of timer 4 timing stipulated time are described The reason fixed time).

One reason is, becomes the surface of accepting rack 18 and door accepting rack 19 etc. in the case of low temperature Condensing minutely, transmitance changes, and is therefore prevented from the detection on receiving state and produces impact. That is, from the beginning of condensation is eliminated after the stipulated time, receiving state is detected.

Another reason is, when refrigerating-chamber door 12a opens, makes case intraoral illumination 20 point as illumination Bright, but prevent the luminosity of the LED owing to causing because of its heating from reducing thus to receiving state Detection produces impact.That is, LED is made to extinguish when door is closed, after the stipulated time, LED Temperature rise be released from, again make LED light, receiving state detected.

In the manner, in order to make the illumination in receiving room stable, and during standby regulation Between.

Additionally, as making other the method that the illumination in receiving room is stable, also there is a following method: Make LED temporarily light after being closed by refrigerating-chamber door 12a to generate heat on the contrary, after the stipulated time The temperature of LED rise saturated and become certain after, start detection.Utilize the method, also can The luminosity enough making LED is stable.

Calculation control unit 1, when starting receiving state detection action, most starts to make as cold preservation The light source igniting (S103) of end face LED20a, 20b of the top side configuration in the upper region in storehouse 100.

Such as, as shown in Figure 8, it is set in case and is accommodated with on accepting rack 18 as storage thing 23a Food, door accepting rack 19 also be accommodated with storage thing 23b situation.In this case, from The composition of the light 24a(light of end face LED20a output is the most indicated by an arrow.Dotted line represents Light-decay.) decay, to it in the way of light 24b, 24c in storage thing 23a reflection Its direction diffusion.And, light 24b, 24c be also repeated cold room 12 wall, other The reflection of food etc..It addition, door accepting rack 19 storage thing 23b reflect light 24d also Decay, spreads to other direction as light 24e, and then the wall of cold room 12 is repeated Face, other food etc. storage thing reflection.Like this after interreflection, cold room 12 The distribution of interior lightness becomes saturated, stable.

Additionally, in general, the irradiation light of LED carries out luminescence with having the irradiating angle of regulation. Therefore, in Fig. 8,24a, the 24d shown in arrow becomes of the composition of the light that LED sends Point.Hereinafter, about light description too.

Use end face LED20a, 20b optical axis towards direction under vertical, key light sensor 21a, The detection direction of 21c towards horizontal direction, each relative to configuration.Therefore, from end face LED20a, The composition of the most light that 20b produces, is not directly incident on key light sensor 21a, 21c, Key light sensor 21a, 21c is incided by the light of wall, storage thing reflection.

Specifically, key light sensor 21a, 21c can be arranged in from the end face becoming light source The position that the optical axis of LED20a, 20b staggers.That is, the directivity of LED is high, it is desirable to will Key light sensor 21a, 21c are arranged in what the light from end face LED20a, 20b not directly entered Position or be not configured to enter.

Fig. 9 represent now detected by key light sensor 21a, receiving state detection characteristic An example.Understand as shown in Figure 9, with the increase of storage amount, luminance reduction.But, (LED20g below side is not made to light in the case of only making end face LED20a, 20b light In the case of), even if being identical storage amount, also in maximum (during storage thing relatively lower section) Error CEA is produced between MACA and minima (during storage thing relatively top) MICA.Cause This, need this error CEA that makes corrections.Method about correction is stated later.Calculation control unit The illuminance information measured is recorded in memorizer 2(S104 as detection data A by 1).

Additionally, in Fig. 9, the longitudinal axis of chart represents " illumination ", but it also is able to use not receive Receive thing time benchmark receiving room illumination on the basis of " relative illumination " or " illumination attenuation rate " etc. Relative value.That is, the attenuation rate operational part 81 of calculation control unit 1 is not received based in receiving room Receive the benchmark receiving room illumination under the state of thing and the detection illumination of optical sensor 21, in storage The attenuation rate from benchmark receiving room illumination under the state having storage thing carries out computing.In these feelings Under condition, LED is easily to should be used as the photometric bias etc. that initial characteristic has.Alternatively, it is also possible to It is " illumination attenuation " on the basis of benchmark receiving room illumination during not receive thing by the longitudinal axis. Hereinafter, the consideration method about " illumination " is identical.

Additionally, end face LED20a, 20b can not receive thing in receiving room The detection illumination of optical sensor 21 become the mode of setting and utilize calculation control unit 1 to adjust Whole.The illumination of end face LED20a, 20b adjusts the advance in freezer 100 catspaw's use OK.Thereby, it is possible to absorb the respective illumination deviation of end face LED20a, 20b.

It addition, the output valve of detection illumination based on optical sensor 21 is current value or magnitude of voltage, Utilize output valve relatively carrys out computing attenuation rate (%).

It addition, the related data of illumination attenuation rate and storage amount presses the capacity of freezer 100, width The different modes such as degree, height are the most experimentally tried to achieve, and are built in calculation control unit 1.

And, as the illumination of the optical sensor 21 when not receiving thing in receiving room Attenuation rate and the related data of storage amount, preserve multiple relevant the most accordingly to multiple light sources Data.

It addition, the detection illumination of optical sensor 21 reads lights rule at end face LED20a, 20b Value (after such as 2 seconds) after fixing time.Furthermore, it is possible to make end face LED20a, 20b light The meansigma methods of time is detection illumination.

Then, calculation control unit 1, after making end face LED20a, 20b extinguish, makes as cold Below the side of the wall configuration below the side in the lower region hiding storehouse 100, LED20g lights (S105).For example it is assumed that as shown in Figure 10 be accommodated with on accepting rack 18 in case storage thing 23c, 23d(such as food) situation.Now, from the composition of the light 24f(light of LED20g output In Fig. 10 by shown in arrow.Dotted line represents light-decay.) occur in storage thing 23c reflection Decay, spreads to other direction as light 24g.And, light 24g also repeats cold room 12 Wall, other the reflection of storage thing etc..It addition, at the light 24h of storage thing 23d reflection Also decaying, the mode such as light 24i, 24j spreads to other direction, and cold room 12 is also repeated Wall, other storage thing reflection.Like this after interreflection, in cold room 12 The distribution of lightness becomes saturated, stable.

Additionally, coordinate the accuracy of detection needed, make below side at least the one of LED20g, 20h Individual light.

When making that below side, LED20g lights, key light sensor 21a detect.Side Lower section LED20g and key light sensor 21a is installed on identical wall (Fig. 3 A and Fig. 3 B), So it is the most relative.This combination is utilized to detect, so from LED20g below side The composition of most light, is not directly incident on key light sensor 21a, and via wall, storage Key light sensor 21a is incided in the reflection of thing.Thereby, it is possible to detection comprises the storage in receiving room The indirectly irradiation light of the reflection light of thing.

Figure 11 represents of receiving state based on key light sensor 21a detection characteristic now Example.Understand as shown in figure 11, with the increase of storage amount, luminance reduction.But, only Make (not make the feelings that end face LED20a, 20b light in the case of LED20g lights below side Under condition), even if being identical storage amount, also at maximum (during storage thing relatively lower section) MACB And produce error CEB between minima (during storage thing relatively top) MICB.Therefore, need Make corrections this error CEB.Method about correction is stated later.Receive thereby, it is possible to reduce The deviation main cause that the deflection receiving thing of indoor of receiving causes, it is possible to increase the storage of storage thing The presumption precision of the storage amount that state causes.

Calculation control unit 1 calculation control unit 1 using the illuminance information that measured as detection data B It is recorded in memorizer 2(S106).

As it has been described above, on storage thing is partial in the case of region, make end face LED20a, 20b When lighting, the illumination decay that storage amount increase causes is big (Fig. 9), makes LED20g below side When lighting, the illumination that storage amount increase causes decays little (Figure 11).On the other hand, at storage thing In the case of the most lower region, when making end face LED20a, 20b light, storage amount increase causes Illumination decay little (Fig. 9), when making that below side, LED20g lights, storage amount increase causes Illumination decay big (Figure 11).

I.e., it is possible to say when making to light as end face LED20a, the 20b in upper region, to upper region Storage thing highly sensitive, when making that below the side as lower region, LED20g lights, right Lower region storage thing highly sensitive.

In the present embodiment, combination makes end face LED20a, the 20b in region and lower region The measurement result that below side, LED20g lights successively, carries out receiving the inspection of the receiving state of thing Survey.Specifically, calculation control unit 1 will such as detect the characteristic shown in data A(Fig. 9) With the characteristic shown in detection data B(Figure 11) make average obtained by value as detection data C meter Calculate (S107).Figure 12 represent detection data C receiving state detection characteristic, i.e. average after Maximum MACC and average after minimum M ICC.Figure 12 with Fig. 9 and Figure 11 is entered Knowable to row compares, being worth obtained by using averagely, error major part is eliminated, with storage thing The deflection to upper and lower configuration independently enabled to precision by correction and detect storage well State.Now, calculation control unit 1 is as above-below direction based on the storage thing in receiving room The attenuation rate computing correcting section of the benchmark data of receiving state correction attenuation rate operational part 81 acts as With.Thereby, it is possible to the storage amount that reliably deflection of the above-below direction of raising storage thing causes Presumption precision.

Additionally, in above-mentioned example, represent that the deflection of the configuration of the above-below direction to storage thing is carried out The example of correction.It addition, about storage thing in the lateral direction or in (depth)/front side To the deflection of configuration, with consideration method same as described above, cold room 12 is drawn in all directions It is divided into two regions, LED or optical sensor 21 are each set.LED, optical sensor The quantity of 21 increases, but can carry out the receiving state detection of higher precision.

Then, calculation control unit 1 perform at light on the incident path of key light sensor 21a The error produced in the case of there is barrier carries out the operation (barrier correction operation) maked corrections. Calculation control unit 1 includes that detection illumination based on optical sensor 21 and benchmark data computing detection are shone The attenuation rate operational part 81 of the attenuation rate of degree.Calculation control unit 1 barrier correction operation and after In the reverberation correction operation stated, work as attenuation rate computing correcting section.In this case, Receiving state presumption unit 82 operation result based on attenuation rate operational part 81 and attenuation rate computing are mended The storage amount of the operation result presumption storage thing in positive portion.

Figure 13 is the key light sensing of the freezer 100 of the 1st embodiment for the present invention is described The figure of the storage example near device 21a.Figure 14 is for illustrating that the key light of this freezer 100 senses The figure of the example that the error that the storage thing near device 21a causes produces.Figure 15 is to represent this cold preservation The figure of the receiving state detection characteristic near the key light sensor 21a in storehouse 100.

As shown in figure 13, it is assumed that the door accepting rack 19 in bottom be provided with storage below thing 23e(, Be labeled as barrier) situation.In this case, storage thing 23e is present in key light sensing Near device 21a, so storage thing 23e is likely to become the incidence of the light making key light sensor 21a The barrier that path narrows.

Figure 14 (detection data C) represents key light sensor 21a's when there is this barrier One example of receiving state detection characteristic.As shown in figure 14, do not have differentiation during barrier special Property F(solid line) the maximum (a) differentiation characteristic G(dotted line when decaying to have barrier) Maximum (b).That is, error DE is produced because of the presence or absence of barrier.Identical with this, do not have The minima (c) of differentiation characteristic F during barrier decays to have differentiation characteristic during barrier The minima (d) of F, produces error DE.

In present embodiment, for these errors that make corrections, use with side below LED20g Below the side that the wall of opposition side is arranged LED20h and with key light sensor 21a same wall surface The secondary optical sensor 21b that is in staggered configuration of the position of door side, the receiving state of detection storage thing 23e.

As shown in Figure 7 B, calculation control unit 1 makes LED20g below side extinguish, and makes under side Side LED20h lights (S108), obtains detection data D(S109 of secondary optical sensor 21b). Figure 15 represents the characteristic of detection data D.Storage thing 23e is to make light to key light sensor 21a During the size of incident path narrowing degree, connect LED20h and secondary optical sensor 21b below side The path of light be interrupted.Therefore, detection data D of secondary optical sensor 21b extremely reduce (ginseng According to Figure 15).

This phenomenon, calculation control unit 1 is utilized to compare detection data D and threshold value E of regulation (S110), it is determined that the presence or absence of barrier.When detecting data D and being bigger than threshold value E of regulation, sentence It is set to clear (region (a) of Figure 15), less than threshold value E of regulation in detection data D Time, it is determined that for there being barrier (region (b) of Figure 15).Calculation control unit 1 is judged to there is barrier When hindering thing, the differentiation characteristic F during clear shown in Figure 14 is used to differentiate receiving state (S111), when being judged to clear, differentiation when having a barrier shown in Figure 14 is used Characteristic G differentiates receiving state (S112).

That is, in the case of calculation control unit 1 pre-saves barrier and the situation of clear Under two kinds of benchmark datas (differentiate characteristic F and differentiate characteristic G), break the barriers correction operation Select any one to differentiate receiving state.

So, according to present embodiment, it is possible to make corrections at light to the incidence of key light sensor 21a The error that path produces in the case of having barrier.

Additionally, in the above description, illustrate the storage thing near key light sensor 21a The error caused produces the operation carrying out making corrections, but this operation also is able to as detection insulated door The operation of the receiving state of storage thing 23e.Now, it is configured with storage thing 23e at door accepting rack 19 Time the position becoming shadow, configure key light sensor 21a.Now, calculation control unit 1 Receiving state correction attenuation rate operational part 81 as storage thing based on the insulated door in receiving room The attenuation rate computing correcting section of benchmark data work.It addition, calculation control unit 1 is as base The benchmark of the receiving state correction attenuation rate operational part 81 of the storage thing near optical sensor 21 The attenuation rate computing correcting section of data works.Thereby, it is possible to reliable body improve storage thing every The presumption precision of the storage amount that popular deflection causes.

Further, the freezer 100 of present embodiment also was able to the week at key light sensor 21a While there is high storage below the thing 23f(of reflectance be also labeled as reverberation) in the case of produce Error makes corrections.This correction method (reverberation correction operation) is described.

Figure 16 is the key light sensing of the freezer 100 of the 1st embodiment for the present invention is described The figure of the storage example of the reverberation near device 21a.Figure 17 is for illustrating this freezer 100 The error that the reverberation of key light sensor proximity 21a causes produces the figure of example.Figure 18 A～Figure 18 C It it is the figure of the relation of the wavelength of the light representing this freezer 100 and reflectance.Figure 19 is to represent this The figure of the reverberation detection characteristic near the key light sensor 21a of freezer 100.

In general, the storage thing (reverberation) that reflectance is high is for white or connects subalbous thing Body.It addition, as the container of metal, the diffusibility of the light on surface is low, have light-gathering Object is also defined as reverberation.

In figure 16, near key light sensor 21a, the storage thing 23f of configuration is reverberation. When receiving the reflectance height of thing 23f, the decay of light based on reflection is few, it addition, there is also light not Diffusely by the situation of optically focused.The tendency that the illumination of the periphery that accordingly, there exist storage thing 23f uprises. With and this, the illumination of neighbouring key light sensor 21a periphery also uprises.

The example being detected receiving state detection characteristic by key light sensor 21a such as Figure 17 Shown in (detection data C), produce error because of the difference of the reflectance of storage thing 23f.Such as, With the characteristic (a) during the reverberation not represented by solid line relatively, exist and be illustrated by the broken lines The characteristic (b) when receiving thing of slightly higher reflectance produces error J, additionally, there are by point The characteristic (c) when receiving thing of the high reflectance that line represents produces error H.

For this error that makes corrections, in the present embodiment, blue led 22a and key light is used to pass Sensor 21a, the reflections affect of detection storage thing 23f.In general, reflectance high for white Object, so at this by identify white object as a example by illustrate.

First, the reason using blue led 22a is illustrated.Such as Figure 18 A(redness The reflectivity Characteristics of object) shown in, 400～500nm have the blue wave band of peak value The light (light of the peak band of blue led 22a) of BW is lower than the reflectance of red object. It addition, such as the reflectivity Characteristics of object blue for Figure 18 B() shown in, the peak of blue led 22a The light of value wave band BW is than the reflectance as little as less than 50% of blue object.On the other hand, as The reflectivity Characteristics of the object of Figure 18 C(white) shown in, the object of white has the most anti- Penetrate the characteristic of the light of whole wave band, so the light of the peak band BW for blue led 22a, Its emissivity uprises.That is, blue wavelength is difficult to the object reflexed to beyond white, thus suitable Close the object distinguishing white.Then, in the present embodiment, the knowledge of blue led 22a is used The not object of white.

For example it is assumed that it is not that use blueness and use the light of wavelength of redness.Now, such as Figure 18 A Shown in, there is before and after 650nm the light of red wave band RW of peak value at red object Reflectance is high, equal with the reflectance of the object of the white shown in Figure 18 C.That is, red light Even if at the low homochromy object of reflectance also to a certain degree to reflect, so being difficult to distinguish White and red object, in order to carry out the differentiation of reverberation, use blue led 22a more preferable.

Additionally, reflectance is by the Color influences of object, so such as use the wavelength utilizing RGB The detection reverberation such as chromaticity transducer time, it is possible to differentiate with higher precision.

It addition, the object low to the diffusibility of light as the container of metal, particularly with light Wavelength irrelevant ground optically focused, it is possible to utilize its characteristic to detect.

When error that such as, as shown in figure 19, reverberation causes and blue led 22a light Between the output of key light sensor 21a, there is dependency, so utilizing this relation to this mistake that makes corrections Residual quantity.

Specifically, first, calculation control unit 1 makes case intraoral illumination 20 extinguish, and makes blue led 22a Light (S113), memorizer 2 will be recorded based on detection data K of key light sensor 21a (S114).

Then, threshold value L determined more as shown in figure 19 and detection data K(S115).Figure 19 is to represent that the error impact that reverberation when blue led is lighted causes (detects data with illumination The figure of relation K).Result of the comparison in step sl 15, detects data K hour, sentences Determine the ES that the impact of reverberation is small, do not carry out make corrections (S116).On the other hand, detection number According to K big time, it is determined that there is the EL of reflections affect, the Error subtraction scheme characteristic caused based on reverberation The value of M, estimation error J or error H, carries out the correction of detection data C shown in Figure 17 (S117).

Specifically, detection data C are maked corrections by the value deducting error J or error H.

By perform above-mentioned each step (master data obtain operation, barrier correction operation and Reverberation correction operation), calculation control unit 1 calculates the detection characteristic of the storage amount after correction.This Time, calculation control unit 1 is as reflectance correction attenuation rate fortune based on the storage thing in receiving room The attenuation rate computing correcting section of the benchmark data in calculation portion 81 works.Thereby, it is possible to reliably carry The presumption precision of the storage amount that the reflectance of high storage thing causes.

Figure 20 is the receiving state detection characteristic after the correction calculating of the 1st embodiment of the present invention Figure.

Figure 20 represents and utilizes each step shown in Fig. 7 A and Fig. 7 B to be carried out by calculation control unit 1 Storage amount detection characteristic after master data acquirement, barrier correction and reverberation correction (is mended After just).Understand the error of the maximum (a) after correction and the minima (b) after correction very Little, it is possible to precision estimates receiving state with simulating well.Use the characteristic after this correction, fortune Calculate control portion 1 and carry out storage amount detection.Specifically, receiving state presumption unit 82 is based on decay Storage amount (step 118) of the operation result presumption storage thing of rate operational part 81.Receiving state pushes away Determine portion 82 and utilize the storage shape of the output valve presumption storage thing irradiating light based on optical sensor 21 State.

In the present embodiment, in the presumption of receiving state, as shown in figure 20, setting is used Multiple threshold values P, Q, R, S, by the degree of storage amount with the 5 of degree (level) 1～5 etc. Level carries out the mode differentiated.Specifically, the receiving state presumption unit 82 of calculation control unit 1, It is determined as the storage amount of degree 1 time more than threshold value P, is determined as degree 2 when threshold value P～Q Storage amount, be determined as the storage amount of degree 3 when threshold value Q～R, sentence when threshold value R～S Not Wei the storage amount of degree 4, be determined as the storage amount of degree 5 time below threshold value S.That is, In the case of the attenuation rate calculated by attenuation rate operational part 81 is big, receiving state presumption unit 82 It is estimated as storage amount many.

In above-mentioned example, the value to the attenuation rate calculated based on attenuation rate operational part 81, storage The storage amount of condition estimating portion 82 presumption storage thing, i.e. the storage to absolute value based on illumination The presumption of amount illustrates.

But, the present invention is not limited to this example.For example, it is possible to be receiving state presumption unit 82 The structure of operation result based on attenuation rate operational part 81 presumption storage amount, specifically, decay Rate operational part is so that the operation result till last time (can also be the operation result of last time, also may be used Operation result before being) on the basis of receiving room illumination, computing from benchmark receiving room illumination The structure of attenuation rate.

Thus, memorizer 2 only stores the data to last time, by calculation control unit 1 Control become easy.

Such as, in the relation of Figure 20, when judging the increase of storage amount, the storage before change When amount is for degree 3, only differentiate when the difference of " threshold value Q-threshold value R " is above in illumination change For being transferred to degree 4, in addition in the case of, be maintained at degree 3.Thus, even if because of outward Portion's noises etc. produce the detection error of a few percent, it is also possible to prevent the mistake of the change of receiving state Detection.About the minimizing of judgement storage amount, also carry out with same consideration method.Such that, Relative value based on illumination change, it is also possible to the relative change of presumption storage amount.

Further, calculation control unit 1 can be that the relative value being typically based on illumination change estimates storage The relative change of amount, the termly structure of the absolute value of absolute value based on illumination presumption storage amount. Utilize this structure, even if changing over considerably less situation and storage amount in storage amount Judgement degree indeclinable in the case of, by estimating absolute value termly, it is also possible to judge just True storage amount.

It addition, the receiving state presumption unit 82 of calculation control unit 1 uses door open-close detection sensor The testing result of 3, output valve based on the optical sensor 21 before opening the door and the light sensing closed behind the door The output valve of device 21, it is also possible to the receiving state (increase and decrease) of the storage thing in presumption receiving room.

Such as, receiving state presumption unit 82, the output valve from optical sensor 21 before enabling With the variable quantity of the output valve of the optical sensor 21 closed behind the door than setting little in the case of, also can The storage amount of the storage thing being enough estimated as in receiving room does not changes.

Thus, in the case of freezer 100 energy-saving operation, the change of the storage amount before and after door opening and closing Change few, it is judged that for need not release energy-saving operation, freezer 100 continues energy-saving operation, thus Can economize on electricity.

It addition, the output valve of detection illumination based on optical sensor 21 is current value or magnitude of voltage, By comparing output valve, computing attenuation rate (%), memorizer 2 can store attenuation rate (%), The control of calculation control unit becomes easy.

It addition, so that last time till operation result on the basis of receiving room illumination, computing from In the case of the structure of the attenuation rate of benchmark receiving room illumination, i.e. based on illumination change relative value In the case of the change relatively (increase and decrease of presumption storage amount) of presumption storage amount, also with Fig. 7 A and figure The basic flow process of 7B is identical, but in barrier correction operation, because the presence or absence of barrier makes The different threshold value of variable quantity has two kinds, and any one can be selected to carry out barrier correction.

It addition, in reverberation correction operation, when there being reverberation, certain value can be deducted and enters Row reverberation makes corrections so that judge that storage amount is more.

It addition, as shown in figure 20, the interval of threshold value P～S is set as the width when storage amount is few, Additionally narrow when many.This is to consider, storage amount detection characteristic (after correction) is the fewest in storage amount Time gradient the biggest, storage amount more gradient of many times is the least, with storage degree 1～5 interval Impartial mode sets.

Additionally, in the presumption of storage amount, do not carry out using the graduation of above-mentioned multiple threshold values, The differentiation that can be completely carried out simulation (namely be based on the performance plot of Figure 20, exhausted according to illumination Value is calculated the absolute value of the storage amount of correspondence).

After having estimated receiving state, calculation control unit 1 is according to storage amount or the change of storage amount Or reception position etc., control compressor 30, cool down fan 31 and air quantity damper 32 etc. Cooling system 35, in order to carry out optimal cooling operating, and changes condition.

It is additionally, even if the configuration relation of above-mentioned LED and optical sensor 21 is contrary, above-mentioned Receiving state detection mode is also set up.

Additionally, calculation control unit 1 makes LED light successively, is detecting the receiving state of storage thing Period, make the lamp flicker etc. of display part 17, it is also possible to notification user.Further, computing control Testing result, after have detected receiving state, is shown in display part 17 and also is able to notification by portion 1 processed User.

Further, it is assumed that from being detected the closed state of insulated door by door open-close detection sensor 3, to fortune Till a series of control action in calculation control portion 1 terminates, utilize door open-close detection sensor 3 Detect the situation of the open state of insulated door.In this case, the one of calculation control unit 1 is made The control action of series is forced to terminate, and starts again at from the closed state of detection insulated door to computing control The a series of control action in portion 1 processed.Thus, in the case of insulated door is opened by midway, Also by re-starting a series of control action, it is possible to carry out the receiving state inspection of higher precision Survey.

Additionally, in present embodiment, as shown in figures 7 a and 7b, use and carried out basic number Carry out according to the example obtaining operation, barrier correction operation and reverberation correction operation whole Bright.But, the present invention is not limited to this example.Such as, it is also possible to omit barrier correction work At least one of sequence and reverberation correction operation.

Briefly, carry out master data and obtain operation (S103～S107), enter based on this result The judgement (S118) of row storage amount, it is possible to the storage amount of presumption storage thing.

Additionally, master data obtain operation (S103～S107), make end face LED20a, 20b Either one is first carried out to light order with LED20g below side.

In this case, the freezer 100 of present embodiment is for have in cold room 12 Portion arrange end face LED20a, 20b and side below LED20g, 20h and as detection shine Penetrate the structure of key light sensor 21a, 21c of the optical sensor 21 of light.Freezer 100 Illumination attenuation based on key light sensor 21a, 21c can estimate the receiving state receiving thing. Thereby, it is possible to the deviation of the initial characteristic etc. to the LED that should be used as light source, it is possible to accurately Overall receiving state in presumption cold room 12.

It addition, master data obtain operation (S103～S107), step S105～S107(with The meansigma methods of data A and data B is the operation of C) not necessarily, it is also possible to data A Acquirement obtain operation as master data.

It addition, barrier correction operation and reverberation constitute operation not necessarily, it is also possible to only The receiving state of operation presumption storage thing is only obtained with master data.

It addition, also be able to combine master data to obtain operation and barrier correction operation presumption storage The receiving state of thing.

It addition, also be able to combine master data to obtain operation and reverberation correction operation presumption storage The receiving state of thing.

It addition, in the present embodiment, illustrate in fig. 7 to close from by refrigerating-chamber door 12a Start with after the timer 4 timing stipulated time (S102), start the detection action of receiving state The situation of (master data acquirement action), but it also is able in step S101, have detected door and opens After closing, calculation control unit 1 confirms to detect that the output valve of optical sensor 21 (does not has below setting Have the state irradiating light), it is then transferred to master data and obtains operation.Thereby, it is possible to reliably Get rid of the impact from the light outside case.It addition, can be different by the fault of detection optical sensor 21 etc. Often, it is possible to increase the reliability of freezer 100.

In present embodiment, the irradiation light of light source interreflection in receiving room is overall in case, Incide optical sensor 21.Thereby, it is possible to and simple structure detection storage few with number of components State.Additionally, key light sensor 21a, 21c can also only configure one.Thereby, it is possible to Realize cost degradation further.Now, calculation control unit 1 is based on being arranged on the multiple of receiving room The result of the light of light source and single optical sensor 21, according to the receiving state for each light source The receiving state of presumption storage thing.(short transverse, deep receiving room being divided into multiple region In degree direction and width direction etc., it is divided into two regions) in the case of, multiple light sources are extremely A few configuring area being arranged in optical sensor 21, detects each district based on by optical sensor 21 The receiving state of the result presumption storage thing irradiating light of the light source in territory.

It addition, can make the attenuation of illumination that detected by key light sensor 21a, 21c for Under the state not receiving thing in receiving room to benchmark receiving room illumination, actual storage shape The attenuation of the illumination of state, uses the receiving state of its presumption storage thing.Thus, can not only To should be used as light source LED deviation and also can in the receiving room of corresponding freezer 100 Body deviation, it is possible to improve the presumption precision of the receiving state of storage thing further.

Comprise it addition, the attenuation of the illumination detected by key light sensor 21a, 21c is detection Indirectly the irradiating light and calculate of the reflection light of the storage thing in receiving room.Thereby, it is possible to Precision estimates the receiving state of storage thing well.

It addition, key light sensor 21a, 21c configure from the optical axis of light source with staggering.Thus, main Optical sensor 21a, 21c do not accept the direct light from light source, it is possible to easily precision is good The receiving state of storage thing overall in estimating well case.

It addition, key light sensor 21a, 21c and light source use in receiving room not relative to face join Put or by not relative in the way of the structure that configures.Thus, key light sensor 21a, 21c can Prevent from receiving the direct light from light source by ground, it is possible to easily precision is whole in estimating case well The receiving state of the storage thing of body.

The illumination attenuation of key light sensor 21a, 21c is entered it addition, possess according to receiving state The attenuation rate computing correcting section of row correction, it is possible to absorb the deflection of the storage thing in receiving room The main reason of the deviation caused, it is possible to increase the storage amount that the receiving state of storage thing causes Presumption precision.

It addition, the illumination attenuation of key light sensor 21a, 21c is entered as according to receiving state The attenuation rate computing correcting section of row correction, possesses the above-below direction receiving thing in receiving room Receiving state carries out the unit maked corrections, and it is possible to reliably to improve the above-below direction of storage thing The presumption precision of the storage amount that deflection causes.

It addition, the illumination attenuation of key light sensor 21a, 21c is entered as according to receiving state The attenuation rate computing correcting section of row correction, possesses the receipts of the storage thing to the insulated door in receiving room The state of receiving carries out the unit maked corrections, and it is possible to reliably improve the deflection of the insulated door of storage thing The presumption precision of the storage amount caused.

It addition, the illumination attenuation of key light sensor 21a, 21c is entered as according to receiving state The attenuation rate computing correcting section of row correction, possesses the receipts near the optical sensor 21 in receiving room The receiving state of thing received carries out the unit maked corrections, and it is possible to reliably improve because light is passed by storage The presumption precision of the storage amount that the generation of the shadow of sensor 21 causes.

It addition, the illumination attenuation of key light sensor 21a, 21c is entered as according to receiving state The attenuation rate computing correcting section of row correction, possesses the reflectance to the storage thing in receiving room and carries out The unit of correction, it is possible to reliably to improve pushing away of the storage amount that the reflectance of storage thing causes Determine precision.

It addition, by optical sensor 21 is arranged in than light source more on the lower, optical sensor 21 The impact of the condensation that can reduce the inflow of the extraneous air that an opening and closing causes and cause, it is possible to base Illumination attenuation precision in optical sensor 21 estimates the receiving state of storage thing well.

It addition, case intraoral illumination 20 and optical sensor 21, it is arranged on the degree of depth side than cold room 12 Center upwards is more by refrigerating-chamber door 12a side.It is easily subject to door thereby, it is possible to reliably detect The receiving state of the storage thing of the entrance of the impact that the extraneous air that opening and closing causes flows into.

It addition, case intraoral illumination 20 and optical sensor 21 are arranged in the case being installed on cold room 12 Between leading section and the refrigerating-chamber door 12a of accepting rack 18.Accepting rack in refrigerating-chamber door 12a and case The probability that the upper and lower space stored object of the front end of 18 is blocked is relatively low.Thereby, it is possible to guarantee From the stable light path of light source, and can be based on the storage thing of accepting rack 18 in insulated door, case The illumination attenuation of optical sensor 21 that causes of existence, precision estimates the receipts of storage thing well Receive state.

It addition, cold room 12 is divided into multiple region, it is possible to storage thing deflection independently Precision carries out the detection of receiving state well.

It addition, make at least some of and case intraoral illumination 20 of the light source of receiving state detection use hold concurrently With, it is possible to be not provided with new light seedbed with simple structure detection receiving state.At dual-purpose Case intraoral illumination 20 and receiving state detection used light source at least some of in the case of, make The lightness for illumination in the case of opening door and the photograph required for receiving state detects Bright lightness change, it is possible to improve further the precision of receiving state detection.

It addition, utilize LED and optical sensor 21 not relative to the combination of configuration detect, Can suppress to be directly incident on the composition of the light of optical sensor 21 from LED, it is possible to increase storage The attenuation rate of the light that thing causes, it is possible to increase accuracy of detection.

It addition, as identifying that the receiving state near LED or optical sensor 21 makes corrections Structure, such as can suppress the incident path of light near for optical sensor 21 barrier, And it is accommodated in the error that the reverberation near optical sensor 21 causes.

(the 2nd embodiment)

Hereinafter, the 2nd embodiment of accompanying drawing based on Figure 21 to Figure 25 explanation present invention is cold Hide the structure in storehouse 200～205.

Additionally, to the same or similar structure of structure that illustrated in the 1st embodiment, make By same-sign, the description thereof will be omitted.

Figure 21 is the cross section of the side viewing of the freezer 200 of the 2nd embodiment from the present invention Figure.Figure 22 is to be accommodated with storage thing 23h in the inside of the cold room of this freezer 200 for explanation The figure of state.Figure 23 A is viewed from above the light sensing of the freezer 201 of this embodiment Device 21 configures the sectional view of example.Figure 23 B is viewed from above the freezer 202 of this embodiment Optical sensor 21 configure the sectional view of example.Figure 24 A is to watch the cold of this embodiment from side Hide the sectional view of the configuration example of the optical sensor 21 in storehouse 203.Figure 24 B is to watch this reality from side Execute the sectional view of the configuration example of the optical sensor 21 of the freezer 204 of mode.Figure 25 is from upper The configuration example of the optical sensor 21 in wind path of the freezer 205 of this embodiment is watched by side Sectional view.

In present embodiment, the case intraoral illumination 20 being arranged on side is used to detect to main In the case of, the example of the collocation method of various optical sensors 21 illustrates.

LED and the position relationship of optical sensor 21 are described.

In the example shown in Figure 21 and Figure 22, at top side configuration key light sensor 21d, 21e. Make from the lateral depth direction of refrigerating-chamber door 12a irradiate illuminating LED 20c～20f and from Below side, the light of LED20g reflects in case Nell wall and food, overall, then in case Incide key light sensor 21d, 21e.Therefore, key light sensor 21d is arranged in illumination to use The light emission luminosity of LED20g irradiation angle beta more than 50% below LED20c～20f and side Outside so that the light of LED20g is the most direct below illuminating LED 20c～20f and side Incide key light sensor 21d.

It addition, in order to make light entirety in case, it is desirable to it is back in light the inside reflection in case Detect the when of case inside door side.Therefore, end face optical sensor 21d is arranged on ratio in case The 1/2(center of depth) more by the position of refrigerating-chamber door 12a side.But, key light sensor 21e For receiving state inboard in detection case more accurately, with the work of supplementary key light sensor 21d With setting.Therefore, inboard and illuminating LED 20c in key light sensor 21e is arranged in case Incident angle β in.

When refrigerating-chamber door 12a is opened and closed, extraneous air flows in case, and the temperature inside the box is somewhat gone up Rise.Now, the storage thing near door is compared with the storage thing of the inside, it is easier to by this temperature The impact of change.Thus, it is desirable to detect the receiving state of the storage thing of door side, institute more accurately More preferable to arrange the effect of key light sensor 21a in refrigerating-chamber door 12a side.

Additionally, in the situation of structure design, exist and be difficult to arrange master in refrigerating-chamber door 12a side The situation of optical sensor 21a, the illumination angle of LED can not be met in put into key light sensor 21a Situation Deng these conditions.In this case, the most not relative with LED light source setting it is arranged to Put key light sensor 21a, so that the irradiation light of LED is not directly incident on key light sensor 21a.

In the present embodiment, as shown in figure 22, though among key light sensor 21d, 21e, Sensor (being key light sensor 21e in this case) the stored object 23h blocking of one side, also Receiving state can be detected by the key light sensor 21d of the opposing party.

In the above description, key light sensor 21d is arranged in the depth direction than receiving room 1/2(center) more by the end face of refrigerating-chamber door 12a side.It addition, by key light sensor 21e It is arranged on the 1/2(center than depth direction) more by inboard end face.But, the present invention does not limits Due to this example.

Such as, as shown in the freezer 201 of Figure 23 A, key light sensor 21f is arranged in ratio The 1/2(center in the width direction of receiving room) the door side that more keeps left, key light sensor 21g is set Put at the 1/2(center than case internal transverse width) the door side more kept right.

It addition, as shown in the freezer 202 of Figure 23 B, key light sensor 21h is arranged in cold Hide room door 12a, it addition, key light sensor 21i is arranged on the 1/2(center than case internal transverse width) The inboard more kept right.Utilize this structure, can not only food receiving state about detailed inspection, And the food receiving state of the inside/front can be detected in detail.Further, by key light sensor 21h It is arranged in refrigerating-chamber door 12a, becomes overall in key light sensor 21h sees case towards depth direction Configuration, storage amount detection overall in case becomes easy.In order to obtain same effect, logical Cross and key light sensor is set towards depth direction, it is also possible to key light sensor is set in chamber interior wall face.

It addition, as shown in the freezer 203 of Figure 24 A, key light sensor 21j can be arranged Top in receiving room and refrigerating-chamber door 12a side, furthermore it is possible to by key light sensor 21k The bottom being arranged in receiving room and refrigerating-chamber door 12a side.Thereby, it is possible to sensed by key light The device 21j detection ratio 1/2(center of case inner height) light quantity of accommodation space of more top side, logical Cross the key light sensor 21k detection ratio 1/2(center of case inner height) accommodation space more on the lower Light quantity.

In general, compared with other receiving room, cold room 12 that height dimension is the highest It is vertically disposed with key light sensor 21j, 21k, it is possible to detection food receiving state in detail.

It addition, as shown in the freezer 204 of Figure 24 B, the top in receiving room and cold room Door 12a side is provided with key light sensor 21m, alternatively, it is also possible to set by key light sensor 21n Put the bottom in receiving room and inboard.Utilize this structure, it is possible to utilize key light sensor 21m The front of detection accommodation space and the accommodation space of upside, utilize key light sensor 21n detection to receive Receive the rear in space and the accommodation space of downside.Thus, above-below direction can not only be detected in detail The receiving state of storage thing, and in also being able to detect in detail/receipts of the storage thing in direction, front Receive state.

It addition, as shown in the freezer 205 of Figure 25, the light of the door side except being installed in case passes Sensor 21(is not shown) outside, also key light sensor 21p, 21q are arranged in order to cold preservation In the cooling air duct 25 sending cold air in room 12 and arrange.Now, light is entered by outlet 26 Be mapped to secondary optical sensor 21b, but cooling air duct 25 to the outlet 26 of receiving room reliably Opening, so the blocking of key light sensor 21p, 21q not stored object, it can be ensured that enter light path. During just in case outlet 26 is by storage thing blockings such as food, the luminosity of light reduces, it is possible to detection Go out the situation that the cold air air-supply efficiency in cold room 12 reduces.

Additionally, not only in the outlet 26 of wind path and also optical sensor is set near suction inlet 21。

Additionally, in explanation in this, record the side using two key light sensor 21a～21q Formula, but the usage quantity of optical sensor 21 is not limited to this, in order to suppress the usage amount of material also may be used Think one, can arrange multiple to easily improve accuracy of detection.It addition, multiple light sensing The configuration of device 21 is also not necessarily limited to above-mentioned pattern, when freezer 200 is divided into two regions, Two region configuration light sources or optical sensor 21.

It addition, in order to detect in further detail, utilize electromechanical actuators to drive optical sensor 21 or LED, angle can be made freely to change.

Even if it addition, the configuration relation of above-mentioned LED and optical sensor 21 is contrary, this storage State-detection mode is also set up.

As it has been described above, in present embodiment, at the cold room 12 divided by thermal wall and insulated door It is provided with LED20g, 20h and key light sensor below illuminating LED 20c～20f and side 21a～21q is as the receiving state test section differentiating receiving state.It addition, by optical sensor 21 At least one be arranged on the Geng Kaomen side, center of the depth than cold room 12.Thereby, it is possible to enter Row cooling controls so that the food temperature affected by receiving state becomes proper temperature, so Can improve freshness and can suppress to consume electric power by preventing " supercool ".

It addition, compare receiving room by being arranged on by the optical sensor 21 constituting receiving state test section The center of depth more by refrigerating-chamber door 12a side, it is possible to detection is easily subject to Yin Menkai exactly Close the receiving state of the food of the entrance of the impact that the extraneous air caused flows into, and keep For proper temperature.Further, such as in the case of cold room 12, accepting rack 18 and door in case Existential Space between accepting rack 19, so by configuring optical sensor 21 at this, it is possible to prevent from receiving State detecting section of receiving is contained food blocking.

During it addition, optical sensor 21 is arranged on refrigerating-chamber door 12a, it is possible to optical sensor is set 21 so that overall in case is seen towards depth direction in case in door side.

It addition, when cold room 12 is divided into former and later two regions at the center of depth, if Optical sensor 21 is set in respective region, it becomes possible to storage thing inboard in detection case exactly Receiving state.

It addition, when cold room 12 is divided into left and right Two Areas at the center of width, if Optical sensor 21 is set in respective region, it becomes possible to differentiate the deflection etc. of the left and right of storage food.

It addition, when cold room 12 is divided into upper and lower Two Areas at the center of height, it is possible to In respective region, optical sensor 21 is set.Thus, it is however generally that, the longest cold of height dimension Hide in room 12, by configuring optical sensor 21 in the upper side and lower side, it is possible to accurately whole in detection case The receiving state of body.

Pass it addition, arrange light in the outside of the range of exposures that light emission luminosity is more than 50% of LED Sensor 21, thus the irradiation light of LED is not directly incident on optical sensor 21, and stored object is anti- After penetrating or covering, incide optical sensor 21, so the detection of receiving state becomes easy.

It addition, optical sensor 21 can be arranged on the cooling for cold air is sent to receiving room In wind path 25.Thus, the outlet 26 reliably opening to receiving room of cooling air duct 25, So optical sensor 21 is not blocked by food, it can be ensured that enter light path.Just in case outlet is eaten During the storage thing blocking such as product, the luminosity of light reduces, it is possible to detect that reduction is to cold room 12 The situation that interior cold air air-supply efficiency reduces.

It addition, when arrange can change LED, optical sensor 21 towards angle changing unit Time, each corner also being able to case in broad receiving room confirms receiving state.

The structure using above-mentioned freezer 100,200～205 can be applicable to home-use or work Industry freezer.Thus, use the storage amount detection function of freezer 100,200～205, Can implement, apply the control of the switching operation modes such as economize on electricity operating.

As it has been described above, the freezer 100,200～205 illustrated in each embodiment is not only The position receiving thing in receiving room can be differentiated, and the storage amount of entirety, institute can be estimated To carry out temperature corresponding with receiving state control, it is possible to play and improve freshness, raising By preventing superfluous cooling from suppressing to consume the useful effect of electric power.

Additionally, in above-mentioned each embodiment, in using detection cold room 12 as receiving room The example of receiving state of storage thing be illustrated.But, the present invention is not limited to this example Son, it is also possible to be applicable to other receiving room, such as, ice-making compartment 13, switching chamber 14, freezing Room 15 and vegetable compartment 16.

Industrial utilizability

Can carry out and the storage within freezer according to the present invention, as described above, it is possible to play The special effect that the receiving state of thing cools down accordingly, so as the receipts having in detection case The freezer etc. of unit of receiving state of thing received is useful.

Description of reference numerals

1 calculation control unit

2 memorizeies

3 open-close detection sensor

4 timers

11 freezer main bodys

12 cold rooms

12a refrigerating-chamber door

13 ice-making compartments

14 switching chambers

15 refrigerating chambers

16 vegetable compartment

17 display parts

Accepting rack in 18 casees

19 accepting racks

20 casees intraoral illuminations

20a, 20b end face LED

20c～20f illuminating LED

LED below 20g, 20h side

21 optical sensors

21a, 21c～21q key light sensor

21b pair optical sensor

22a, 22b blue led

23a～23h receives thing

24a～24j light

25 cooling air ducts

26 outlets

30 compressors

31 cooling fans

32 air quantity dampers

35 cooling systems

81 attenuation rate operational parts

82 receiving state presumption units

100,200～205 freezer

Claims (5)

1. a freezer, it is characterised in that including:

Divided by thermal wall and insulated door, the receiving room of storage storage thing；

It is arranged on the light source of the inside of described receiving room；

Detect the optical sensor irradiating light irradiated from described light source；

Detect the door opening and closing test section of the opening and closing of described insulated door；With

Testing result based on described optical sensor carries out the calculation control unit of calculation process, wherein

Described optical sensor, is arranged in than the center of the depth direction of described receiving room more by described Insulated door side, to anti-in the wall of described receiving room or the reflection of described storage thing of described irradiation light Penetrate light to detect,

Described calculation control unit has:

Attenuation rate operational part, it is based under the state not having described storage thing in described receiving room Benchmark receiving room illumination and the detection illumination of described optical sensor, to being accommodated with described storage thing The attenuation rate relative to described benchmark receiving room illumination under state carries out computing；With

Receiving state presumption unit, the presumption of its operation result based on described attenuation rate operational part is described The storage amount of storage thing,

In the case of described door opening and closing test section detects closed state, described calculation control unit is entered The described calculation process of row.

2. freezer as claimed in claim 1, it is characterised in that:

In the case of the described attenuation rate calculated by described attenuation rate operational part is big, described receipts Receiving condition estimating portion, to be estimated as described storage amount many.

3. freezer as claimed in claim 1, it is characterised in that:

Described optical sensor is arranged at, and comprises in the case being installed on described receiving room before accepting rack The vertical guide of end of side, side and the vertical guide of the end of the rear side comprising described insulated door it Between.

4. the freezer as described in claim 1 or 3, it is characterised in that:

In the inside of described receiving room, described light source is arranged in more closer to the top than described optical sensor Position.

5. the freezer as described in claim 1 or 3, it is characterised in that:

In the inside of described receiving room, described optical sensor is arranged in from the optical axis of described light source wrong The position opened.