WO2022157999A1 - Unité de stockage - Google Patents

Unité de stockage Download PDF

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Publication number
WO2022157999A1
WO2022157999A1 PCT/JP2021/020520 JP2021020520W WO2022157999A1 WO 2022157999 A1 WO2022157999 A1 WO 2022157999A1 JP 2021020520 W JP2021020520 W JP 2021020520W WO 2022157999 A1 WO2022157999 A1 WO 2022157999A1
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WO
WIPO (PCT)
Prior art keywords
sensor
weight
container
sensor unit
wiring
Prior art date
Application number
PCT/JP2021/020520
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English (en)
Japanese (ja)
Inventor
大 板倉
正展 石塚
義明 藤木
Original Assignee
日立グローバルライフソリューションズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from JP2021008582A external-priority patent/JP7352586B2/ja
Priority claimed from JP2021012642A external-priority patent/JP2022116465A/ja
Application filed by 日立グローバルライフソリューションズ株式会社 filed Critical 日立グローバルライフソリューションズ株式会社
Publication of WO2022157999A1 publication Critical patent/WO2022157999A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices

Definitions

  • the present invention relates to a container such as a refrigerator.
  • Patent Document 1 As a technique for detecting the storage position of a contained object, there is a technique described in Patent Document 1, for example.
  • pressure sensors 11 are fixed to the four corners of a shelf support bead 2a formed on the side wall of an inner box 2 forming a refrigerating chamber 3 and protruding in the front-rear direction (0012). , 0013, FIGS. 2, 3, etc.).
  • an upper shelf 54, a lower shelf 55, and a strain gauge sensor 56 and electrical wiring provided in a gap between them are formed as a single shelf.
  • the electrical wiring is fitted into a sensor-side waterproof connector 58 provided on the rear side of the shelf and connected to a body-side waterproof connector 59 of the refrigerator 51 (0026, 0027, 0031, 0032, FIG. 2, etc.). It is a structure in which the upper shelf 54, the lower shelf 55, and the clearance space are pulled out together (0032). It is assumed that weight detection is performed by a single strain gauge sensor 56 (0012, 0036, etc.).
  • Patent Document 2 discloses a housing structure for improving detection accuracy in a method in which a single strain gauge sensor 56 is arranged in the center of the upper shelf 54, and does not describe a method assuming a plurality of sensors. Neither mentioned nor suggested.
  • an inner box forming a frontally open storage compartment; a shelf or container arranged in the storage room; a plurality of weight sensors that receive the weight of the contents placed on the shelf or the container; a sensor unit;
  • the sensor unit is a first mounting portion that accommodates at least one of the weight sensors and at least a portion of wiring connected to the weight sensor;
  • the container is provided with a second mounting portion connected to the first mounting portion and housing at least one of the weight sensors and at least part of the wiring connected to the weight sensor.
  • the sensor unit is provided below the shelf or the container and is separate from the shelf or the container. or, The sensor unit is attached to the shelf or the container, A fixing member that supports the shelf or the container, A weight detection portion of the weight sensor faces downward and can come into contact with the fixed member.
  • FIG. 2 is a sectional view taken along line II-II of FIG. 1; It is a front view of a refrigerator in the state which removed the door. It is the perspective view which cut
  • FIG. 4 is an external perspective view of a state in which the upper sensor unit is removed;
  • FIG. 7 is an external perspective view showing a state in which a container is placed on the upper sensor unit of FIG. 6;
  • FIG. 4 is a top view of the upper sensor unit with the cover member removed;
  • FIG. 9 is a cross-sectional view taken along the line IX-IX (a cross-sectional view showing a fixed state of the sensor unit 220 (mounting portion main body 223 and cover member 224) to the inner box side) to which the inner box, fixing members, etc. are added to FIG. It is the perspective view which put the lower side of two sensor units in the field of view.
  • 11 is a cross-sectional view along line XI-XI of FIG. 10;
  • FIG. 11 is a cross-sectional view taken along line XII-XII of FIG. 10;
  • FIG. 1 is an external perspective view of a weight sensor;
  • FIG. 1 is an exploded perspective view of a weight sensor;
  • FIG. 4 is a top view of the lower sensor unit with the cover member removed;
  • Fig. 2 is a cross-sectional perspective view with the right half removed of the refrigerator showing a state in which the tray and the container are placed on the lower sensor unit;
  • FIG. 2 is a cross-sectional perspective view with the right half of the refrigerator removed, showing a state in which the tray is placed on the lower sensor unit;
  • Fig. 2 is a see-through external perspective view of the refrigerator showing the connection relationship between the lower sensor unit and the wiring; It is the cross-sectional perspective view which deleted the left half of the refrigerator.
  • 24 is an enlarged view of the XXIV part of FIG. 23;
  • FIG. 24 is an enlarged view of the XXIV part of FIG. 23;
  • FIG. 24 is an enlarged view of the XXIV part of FIG. 23;
  • FIG. It is a left side view of a container.
  • FIG. 28 is an enlarged view of XXVIII part of FIG. 27; 4 is an enlarged view of the XXIX part of FIG.
  • FIG. 3 (a front view showing a state where a container is placed on the weight sensor);
  • FIG. FIG. 30 is an enlarged view of the XXX part of FIG. 29; It is the downward perspective view which looked at the container from the downward diagonal.
  • 5 is an enlarged view of XXXII part of FIG. 4.
  • FIG. 5 is an enlarged view of XXXIII part of FIG. 4.
  • FIG. It is a left view of the container which mounted the content. It is the side view which penetrated the right side of a refrigerator.
  • 36 is a cross-sectional view along line XXXVI-XXXVI of FIG. 35;
  • FIG. It is the external appearance perspective view which looked at the shelf from upper direction. It is the external appearance perspective view which looked at the shelf from the downward direction. It is the exploded perspective view which looked at the shelf from the downward direction.
  • FIG. 11 is a cross-sectional view along line XI-XI of FIG. 10 in another embodiment;
  • constituent elements of the present invention do not necessarily have to be independent entities, and one constituent element may consist of a plurality of members, a plurality of constituent elements may consist of one member, a certain constituent element may part of a component, part of one component overlaps part of another component, and so on.
  • Example 1 of the present invention will be described with reference to the drawings.
  • a refrigerator capable of keeping cold by adjusting the temperature of the storage compartment
  • As a storage box it is possible to use a storage box whose surroundings are surrounded by walls and doors, and which is open at one or both of its front and rear ends.
  • FIG. 1 is an external perspective view of the refrigerator
  • Fig. 2 is a sectional view taken along line II-II in Fig. 1.
  • 3 is a front view of the refrigerator with the door removed
  • FIG. 4 is a perspective view of the refrigerator in FIG. 1 cut in the front-rear direction
  • FIG. 5 is a system configuration diagram of the refrigerator. As indicated by arrows in each drawing, directions are defined as forward, backward, left, right, up, and down from the viewpoint of the user.
  • Refrigerator 100 forms an outer shell with box body 101 (outer box) having an open front.
  • a door 102 for opening and closing the opening is provided in front of the box 101 .
  • the box 101 is composed of a top plate 101a forming an upper portion, a bottom plate 101b forming a bottom portion, side plates 101c forming left and right sides, and a rear plate 101d forming a back portion.
  • An inner box 103 is provided inside the box 101 .
  • a foam heat insulating material 140 is filled between the box 101 and the inner box 103 .
  • a plurality of shelves or containers 105 are provided in the vertical direction in the storage interior 104 (storage room) formed by the inner box 103 .
  • each container has a side wall height of, for example, several centimeters or more, and is connected to the side wall and provided with a mounting surface which is a substantially horizontal surface.
  • the sidewall height of containers 105a and 105b is less than the sidewall height of containers 105c-105e.
  • Foods such as meat, fish, vegetables, and beverages are placed in the container 105 as items to be stored.
  • Each of the containers 105a, 105b, 105c, 105d, and 105e is detachable, and can be taken out of the refrigerator with the contents placed thereon. In addition, it is possible to remove the containers 105d and the like and place a tall object on the lowermost container 105e.
  • the contents are contained in the container 105 having a side wall height.
  • the specific height of the side wall it is desirable to set it to 3 cm, 4 cm, or 5 cm or more, depending on the height to the shelf immediately above and the items to be stored.
  • the container 105b in this embodiment can accommodate 200 ml paper pack juice or 500 ml cans, and the upper limit of the side wall height can be 9 cm or 8 cm.
  • the positions of the containers 105a and 105b for the weight sensor unit can be interchanged, and the positions of the containers 105c and 105d not for the weight sensor unit can be interchanged. Note that the containers 105a and 105b for the weight sensor unit and the containers 105c and 105d not for the weight sensor unit may be exchanged.
  • a plurality of inner box upper ribs 106a and a plurality of inner box lower ribs 106b extending in the front-rear direction are formed on the inner surface of the inner box 103 .
  • the inner box upper rib 106 a and the inner box lower rib 106 b are formed on both left and right walls of the inner box 103 .
  • a sensor unit 220 that supports the mounting surface of the container 105 and accommodates a plurality of weight sensors 200 is provided below each of the inner box lower ribs 106b.
  • three sensor units 220 are provided: an upper sensor unit 220a, a middle sensor unit 220b, and a lower sensor unit 220c. Note that FIG. 4 shows only the middle sensor unit 220b and the lower sensor unit 220c.
  • the number of sensor units is not limited to three. For example, one or two of the upper sensor unit 220a, the middle sensor unit 220b, and the lower sensor unit 220c may be installed.
  • a compressor 107 that compresses the refrigerant is provided at the bottom of the box 101 .
  • a condenser, an expansion valve, and an evaporator (not shown) are connected to the compressor 107 to form a refrigeration cycle, and the heat of vaporization of the refrigerant is used to cool the interior 104 .
  • the inner box 103 is formed with a discharge port 108 for blowing out cold air, and discharges cold air blown from a cooling fan (not shown) into the compartment 104 .
  • a main control board 109 that controls the compressor 107 and the like is provided at the rear of the box 101 .
  • the main control board 109 controls the compressor 107 and the cooling fan based on the internal temperature detected by the internal temperature sensor 110 installed in the internal storage 104, for example.
  • a sensor board 111 for supplying power to a plurality of weight sensors 200 and acquiring the detection results of the weight sensors 200, and a WLAN (Wireless Local Area Network) communication unit 112 is provided at the rear of the box 101 .
  • a WLAN Wireless Local Area Network
  • an operation board 113 is provided for the user to adjust the temperature inside the refrigerator and turn on/off the switch of the WLAN communication unit 112 .
  • the weight sensors 200 are arranged, for example, below the mounting surfaces of the containers 105a, 105b, and 105e, respectively, and detect the weight of the contents placed on the respective mounting surfaces of the containers 105a, 105b, and 105e. By doing so, the presence or absence, the amount, and the number of objects can be detected or estimated.
  • An operation board 113 is connected to the main control board 109, and acquires information on the temperature control volume 113a set by the user.
  • an in-chamber temperature sensor 110 is connected to the main control board 109 to detect the temperature in the in-chamber 104 .
  • the main control board 109 controls the compressor 107 based on the information of the temperature control volume 113 a and the internal temperature detected by the internal temperature sensor 110 .
  • Power is supplied to the weight sensor 200 from the main control board 109 through the sensor board 111 .
  • the weight sensor 200 detects changes in weight, It is transmitted to the sensor substrate 111 as a sensor output.
  • the filter circuit/amplifier circuit 111b performs noise removal and signal amplification, and the detection signal of the weight sensor 200 is input to the sub-microcomputer 111a.
  • the sub-microcomputer 111a stores the detected value of the weight sensor 200 before the change, and determines the presence/absence and amount of the content placed in the container 105 from the detected value before and after the change.
  • the sub-microcomputer 111a can calculate the ratio of the currently detected weight to the pre-registered maximum weight.
  • the maximum weight for example, several predetermined products placed by the user are placed on the placement surface, and this weight can be set to 100%. Specifically, when the user places 10 bottles of beer in the container 105b, the detected value at this time is recorded as the maximum weight (100%). Then, when the user takes out eight bottles of beer from the container 105b, the sub-microcomputer 111a detects that the remaining 20% (two bottles) of the maximum weight recorded in the container 105b is present based on the detection value of the weight sensor 200. Figure out what's left.
  • the sub-microcomputer 111a determines that the beer stock is low, and notifies the user via the WLAN communication unit 112 to place an order because the remaining amount of beer is low. In this manner, inventory management of the refrigerator 100 is performed.
  • Information such as product names can be separately stored in the sub-microcomputer 111a according to user settings, or can be stored in an external device that can be acquired by the sub-microcomputer 111a. Registration of the product name is not essential. In this way, for example, if the user takes care that only a single type of product registered in advance is placed in each container 105 having the weight sensor 200 at the bottom, the stock amount (inventory quantity) of each container 105 can be calculated. can be calculated.
  • the main control board 109 is connected to the sensor board 111, and UART (Universal Asynchronous Receiver Transmitter) communication is performed.
  • UART Universal Asynchronous Receiver Transmitter
  • the main control board 109 obtains information from the sensor board 111 and displays the stock quantity of beer on a display unit (not shown). Further, the main control board 109 performs failure diagnosis of the sensor board 111 .
  • the weight sensor 200 and the sensor substrate 111 are connected by wiring.
  • the weight sensor 200 is installed inside the refrigerator 104, and the sensor substrate 111 is installed, for example, on the outer surface of the box 101, that is, outside the refrigerator. Wiring processing is required to connect these. It is desirable that the wiring in the refrigerator interior 104 should not be exposed in the refrigerator interior 104 from the viewpoint of suppressing disconnection and user contact and improving aesthetics. The wiring process will be described below.
  • FIG. 6 is an external perspective view with the upper sensor unit removed.
  • 7 is an external perspective view showing a state in which a container is placed on the upper sensor unit of FIG. 6.
  • FIG. 8 is a top view of the upper sensor unit with the cover member removed. Since the middle sensor unit 220b has the same configuration as the upper sensor unit 220a, the description thereof will be omitted. Also, the configurations of the first attachment portion 221a side and the second attachment portion 221b side can be the same.
  • the sensor unit 220 (upper sensor unit 220a, middle sensor unit 220b) is formed in a U shape with an open front when viewed from above.
  • the sensor unit 220 includes a first mounting portion 221a (mounting portion 221) and a second mounting portion 221b (mounting portion 221) that are mounted on the left and right walls of the inner box 103 (that is, the side walls of the storage chamber), and the first mounting portion 221b (mounting portion 221).
  • a connecting portion 222 that connects the portion 221a and the second mounting portion 221b is provided.
  • Two weight sensors 200 are provided on the first mounting portion 221a.
  • two weight sensors 200 are provided on the second mounting portion 221b. It is preferable that the connecting portion connects the rear end side of the first mounting portion 221a and the rear end side of the second mounting portion 221b, that is, substantially contacts the rear wall of the inner casing 103 and follows it.
  • the first embodiment includes a total of four weight sensors 200, the number is not limited to this. If the number of weight sensors 200 is less than four, the accuracy may be somewhat inferior.
  • a single weight sensor 200 may be arranged. At least one or more weight sensors 200 (at least two or more in total) should be arranged on each of the right wall and the left wall via the first mounting portion 221a and the second mounting portion 221b.
  • a separate container 105 is placed on the sensor unit 220 . That is, the container 105 is not fixed to the sensor unit 220 and can be separated from the sensor unit 220 .
  • the container 105 is molded, for example, from a transparent resin member. This makes it easier to see the food stored in another container 105 arranged below this container 105, and illuminates a wide range of lights from an interior light (not shown) provided above the storage chamber. be able to.
  • This texturing portion 1051 serves as a blindfold, and it is possible to prevent the weight sensor 200 from being visually recognized through the container 105, thereby improving the design. It is desirable that the texturing portion 1051 is applied to the lower surface side of the bottom surface of the container 105 rather than the upper surface side in consideration of cleanability.
  • the first mounting portion 221a and the second mounting portion 221b cover the mounting portion main body 223 having a U-shaped cross section cut along the vertical direction when viewed from the front of the refrigerator, and the upper open portion having a U-shaped cross section.
  • a cover member 224 is provided.
  • the connection portion 222 includes a connection portion main body 225 having a U-shaped cross section in the vertical direction when viewed from the side of the refrigerator, and a cover member 226 that covers the upper open portion having the U-shaped cross section.
  • a space is formed inside the first attachment portion 221a, the second attachment portion 221b, and the connection portion 222, and this space electrically connects the weight sensor 200 and the sensor substrate 111 as shown in FIG.
  • the weight sensor 200 has, for example, a rectangular shape when viewed from above, and is arranged such that its longitudinal direction extends along the front-rear direction of the box 101 . By arranging the weight sensor 200 in this way, the weight sensor 200 can be brought to the front, back, left, and right of the inner case 103 . In other words, the contents can be easily placed inside the weight sensor 200, and the inclination of the container 105 can be suppressed.
  • the connecting portion 222 is provided on the center side or the rear end side of each of the first mounting portion 221a and the second mounting portion 221b. is located behind the weight sensor 200 on the rear or rear side. By doing so, it is less likely to be an obstacle when the user removes the container 105 . Moreover, if it is on the rear end side, it is easier to arrange the wiring.
  • FIG. 9 is a sectional view taken along line IX-IX when the inner box 103 and the fixing member 229 are added to FIG. cross-sectional view).
  • FIG. 10 is a perspective view of the lower side of the two sensor units. 11 is a cross-sectional view taken along the line XI--XI of FIG. 10.
  • FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. 10.
  • a fixing member 229 extending in the front-rear direction is arranged on the side wall of the inner box 103 .
  • the fixing member 229 is attached to the side wall of the inner box 103 with a screw 231 at a portion (inner box attachment surface) extending vertically in the front cross section.
  • the sensor unit 220 is arranged above a portion (sensor unit mounting surface) of the fixing member 229 that extends left and right in the front cross section.
  • the sensor unit 220 is attached by a screw 230 inserted through the sensor unit attachment surface of the fixing member 229 via a washer 239, for example.
  • the fixing member 229 is made of rigid metal such as stainless steel, and is arranged so that its longitudinal direction extends along the front-rear direction of the inner box 103 . If the distal end portion 229a of the fixing member 229 is exposed, there is a risk that an object that touches the distal end portion 229a may be damaged.
  • a folded portion 223 a is provided by folding back the front tip portion of the fixing member 229 to cover the front edge of the fixing member 229 .
  • a tip portion 229a of the fixing member 229 is arranged between the lower surface of the mounting portion main body 223 and the folded portion 223a.
  • the distal end portion 229a of the fixing member 229 which is made of metal, for example, is preferably formed with a softer folded portion 223a, for example, made of resin, so that the distal end portion 229a is formed into a rounded curved surface on the upper side. , front and underside.
  • a softer folded portion 223a for example, made of resin
  • the inner box 103 may be protruded toward the inside of the refrigerator, and the protruding part may be solidly formed with a heat insulating material or the like, such as a rib. It is only necessary to form a robust base that supports the load applied to the weight sensor.
  • a screw 230 is inserted through the through hole 229b of the sensor unit mounting surface and the through hole 223b of the sensor unit 220.
  • the insertion hole portion 223b is loosely fitted into the through hole 229b with a gap S2, and is positioned substantially radially with this loose fit.
  • the sensor unit 220 is vertically positioned by inserting the screw 230 into the through hole 229b and the through hole portion 223b and screwing them together.
  • the size of through hole 229b is smaller than the outer diameter of washer 239 arranged between the screw head and through hole 229b.
  • the fixing member 229 (inner box mounting surface) is screwed to the inner box 103, and the outer side of the inner box 103 is filled with, for example, a foam insulation material.
  • the storage room which is the space inside the inner box 103, can be at a temperature of 10° C. or more lower than the room temperature environment in which the mounting process of the fixing member 229 and the sensor unit 220 is performed. Therefore, the relative positions of the fixing member 229 and the sensor unit 220 change due to the foaming accuracy of the foamed heat insulating material and the deformation of the inner box 103 and the sensor unit 220 due to thermal contraction even without the foamed heat insulating material.
  • the sensor unit 220 and the fixing member 229 are rigidly fixed, stress due to thermal deformation may be applied, and there is a risk of damage or the like.
  • the gap S2 by providing the gap S2, it is possible to absorb the influence of dimensional change due to thermal deformation or the like.
  • the preferred dimensions of S2 will vary depending on the refrigerator construction. If the effect of deformation due to heat shrinkage is sufficiently small, the mounting portion main body 223 and the sensor unit mounting surface may be directly fixed with screws 230 .
  • FIG. 13 is an external perspective view of the weight sensor
  • FIG. 14 is an exploded perspective view of the weight sensor.
  • the weight sensor 200 includes a plate-shaped load cell 201, a first pedestal 202 arranged below one longitudinal direction side of the load cell 201, and a case body 203 arranged below the first pedestal 202 and on which the load cell 201 is placed. , a second pedestal 204 having an L-shaped vertical cross section, which is arranged on the other side of the load cell 201 in the longitudinal direction, and the load cell 201, the first pedestal 202, and the second pedestal, which are arranged on the upper part of the case body 203. 204 and a weight detection unit 206 arranged on the upper part of the sensor cover 205 .
  • the weight detection unit 206 can be slightly displaced in the axial direction when a force is applied in the axial direction, and can detect the weight according to the force.
  • the upper end of the weight detection unit 206 is above the sensor cover 205 . Therefore, even if a shelf or a container is placed on the weight detection unit 206, the sensor cover 205 can be prevented from rubbing against the shelf or the container.
  • a surface of the sensor cover 205 facing the case body 203 is provided between the second pedestal 204 and the weight detection unit 206 . Further, the sensor cover 205 is made of flexible silicon rubber or the like.
  • Two strain sensors 201a and 201b are attached to the plate-like load cell 201.
  • FIG. The strain sensors 201a and 201b detect the strain of the load cell 201 caused by the load applied to the load cell 201, and the weight is detected from the difference between the strain amounts of the two strain sensors 201a and 201b.
  • the load cell 201 is arranged such that its longitudinal direction extends along the longitudinal direction of the refrigerator.
  • a washer 207 is provided on one longitudinal side (rear direction) of the load cell 201, and a screw 208 is inserted from above.
  • a screw 208 is inserted into a through hole formed in each of the washer 207, the load cell 201, the first pedestal 202, and the case body 203.
  • the load cell 201 is fixed to the case body 203 by screwing a screw 208 into a nut 209 arranged on the opposite side of the first pedestal 202 with the case body 203 interposed therebetween.
  • a washer 210 is provided at the bottom of the load cell 201 on the other (forward) side in the longitudinal direction, and a screw 211 is inserted from the bottom.
  • a screw 211 is inserted into a through hole formed in each of the washer 210 and load cell 201 .
  • a screw 211 is screwed into the second pedestal 204 to fix the second pedestal 204 to the upper part of the load cell 201 on the other side in the longitudinal direction.
  • the second pedestal 204 has a larger vertical dimension on the other longitudinal side of the load cell 201 than on the one longitudinal side.
  • a washer 212 is provided on the lower side of the second pedestal 204 whose vertical dimension is smaller, and a screw 213 is inserted from the lower side.
  • a screw 213 is inserted into a through hole formed in each of the washer 212 , the second pedestal 204 , the sensor cover 205 , and the washer 214 arranged on the upper part of the sensor cover 205 .
  • a screw 213 is screwed into the lower portion of the weight detection portion 206 to fix the second pedestal 204 and the weight detection portion 206 .
  • the washer 214 is arranged between the weight detection unit 206 and the surface of the sensor cover 205 facing the case body 203 .
  • a washer 212, a second pedestal 204, a sensor cover 205, a washer 214, and a weight detector 206 are inserted through the screw 213 in order from the screw head side. This can prevent the sensor cover 205 from being twisted when the screw 213 is screwed into the weight detection unit 206 .
  • the load cell 201 of Example 1 for example, a strain gauge type load cell made of metal is used.
  • the weight sensor 200 of Example 1 is installed in the refrigerator 100 .
  • the door of the refrigerator 100 is opened, outside air is introduced into the inside of the refrigerator 100, and the outside air is cooled inside the refrigerator, causing condensation inside the refrigerator.
  • the load cell 201 is covered with the sensor cover 205 and does not come into direct contact with the outside air, the structure is such that dew condensation is unlikely to occur. Therefore, the detection accuracy of the weight sensor 200 can be maintained.
  • the load cell 201 has a cantilever structure in which one longitudinal side is supported by the case body 203 via the first pedestal 202 and the other longitudinal side is not supported.
  • a second pedestal 204 fixed to the upper portion on the other longitudinal side of the load cell 201 is arranged to extend toward one longitudinal side of the load cell 201, and a weight detection section 206 is connected thereto.
  • the center line C1 of the vertically extending weight detection unit 206 and the center position of the load cell 201 in the longitudinal direction (horizontal direction) are arranged so as to substantially coincide.
  • tension and compression strains are generated in the two strain sensors 201a and 201b, respectively.
  • a hard metal such as stainless steel is more likely to transmit the load to the load cell 201 and the detection accuracy of the weight sensor 200 is improved.
  • the arrangement structure is such that the vertical center line C1 of the weight detection unit 206 and the center position of the load cell 201 in the longitudinal direction (front-rear direction in FIG. 11) are substantially aligned.
  • FIG. 40 by screwing the weight detection unit 206 directly onto the screw 211 without providing the second pedestal 204 and the screw 213, the center line C1 in the vertical direction is moved away from the longitudinal center of the load cell 201.
  • a non-central load configuration may also be used.
  • parts such as the second pedestal 204 and the screw 208 are not required, and not only the number of parts is reduced and the cost is reduced, but also the height of the weight sensor 200 is reduced, enabling a compact structure. Therefore, it is possible to reduce the dead space that may occur when shelves and containers with weight sensors 200 are provided on the floor of the storage room.
  • both of the two strain sensors 201a and 201b are subject to compression strain, and the difference in the amount of strain tends to be small.
  • a small container for example, an internal volume of 201 L or less, which is particularly effective when dead space reduction is emphasized.
  • the center line C2 of the lateral dimension of the weight detection part 206 extending in the vertical direction passes through the fixing member 229.
  • the screw hole center line C3 of the first base 202 is also placed on the fixing member 229.
  • the fixing member 229 firmly supports the load applied to the weight sensor 200 due to the positional relationship regarding the center lines C2 and C3, particularly the positional relationship regarding the center line C3, detection accuracy can be ensured.
  • the load cell 201 , first pedestal 202 and second pedestal 204 are covered with a sensor cover 205 and a case body 203 .
  • the sensor cover 205 is made of flexible silicone rubber or the like, and has a structure in which an end portion 205 a is sandwiched between the case body 203 and the cover member 224 .
  • a member such as a screw 215 is arranged across the cover member 224 and the case body 203, and both are fastened. By this fastening, the end portion 205a is also pressed to the case body 203 side and is crushed, and the infiltration of water can be suppressed by being in close contact.
  • the sensor cover 205 which is made of flexible silicone rubber or the like, bends according to the movement of the weight detection unit 206, so it is possible to suppress the detection accuracy of the weight sensor 200 from being affected. If the hardness (Shore A hardness) or thickness of the sensor cover 205 is too small, the sensor cover 205 is likely to be deformed under the influence of its own weight. Therefore, it is not preferable from the viewpoint of strength. On the other hand, if the hardness or thickness is too large, it becomes difficult to follow the movement of the weight detection unit 206, which affects the detection accuracy, which is not preferable from the viewpoint of flexibility. Therefore, the lower limit of hardness is preferably 20 or more, and the upper limit is preferably 70 or less.
  • the lower limit of the thickness is preferably 0.5 mm or more, and the upper limit is preferably 2.5 mm or less. It should be noted that the thickness of the entire sensor cover does not need to be uniform, and the deformed portion may be at least within the above range. Of course, the material, hardness, and thickness of the sensor cover 205 are not limited as long as strength and flexibility can be secured.
  • the weight detection section 206 of the weight sensor 200 is provided so as to be exposed or protrude upward from the cover member 224 .
  • a protruding portion 224a protruding upward through a gap S1 is formed in the cover member 224 around the weight detecting portion 206.
  • the size of the gap S1 is preferably a distance that can prevent the weight detection unit 206 from being restrained by the cover member 224 even if foreign matter such as sticky liquid, dust, and frost enters the gap S1, for example, 4 mm. , or 5 mm or more.
  • the projecting portion 224 a surrounds the weight detecting portion 206 to prevent water from flowing into the sensor unit 220 .
  • the projecting portion 224a does not cover the entire 360° circumference of the weight detecting portion 206, but is partially cut out to form a drainage portion 224b.
  • the drainage portion 224b is positioned in the notch portion 250 of the guide rail 249. As shown in FIG. With this configuration, even if the liquid drips onto the sensor unit 220, it can be drained from the drain section 224b. A portion of the liquid that could not be completely drained may reach the periphery of the end portion 205a as described above, but is blocked before the sensor unit 220 and evaporates over time.
  • FIG. 15 is a perspective view of a corner inside the box before the wiring is connected, as seen obliquely from below
  • FIG. 16 is a perspective view of the corner inside the box after the wiring is connected, as seen obliquely below
  • FIG. [FIG. 3] is a perspective view of a corner portion inside the box after the wiring cover is attached, as seen obliquely from below;
  • the sensor unit 220 is fixed to the inner box 103 of the refrigerator as described above.
  • a connecting portion opening 232 that opens downward is formed at one of the left and right ends of the connecting portion 222, which is the right end in this embodiment.
  • the other end of the wire 227 accommodated in the wire accommodation portion 228 of the connection portion 222 is pulled out from the connection portion opening 232 and exposed to the outside.
  • a male connector 233 is provided at the other end of the wiring 227 .
  • one end of a wiring 234 is connected to the sensor substrate 111, and the wiring 234 from the sensor substrate 111 passes between the box body 101 (outer box) and the inner box 103, and passes through a cutout formed on the wall surface of the inner box 103. It is pulled out from the notch opening 114 and exposed to the outside.
  • a female connector 235 is provided at the other end of the wiring 234 .
  • a wiring cover 236 is arranged below the sensor unit 220 so as to cover the wiring 234 .
  • the wiring cover 236 is arranged to connect the connecting portion opening 232 and the notch opening 114 to form a space for accommodating the wiring 234 .
  • a flange portion 236 a is formed on a portion of the wiring cover 236 located on the side of the inner box 103 .
  • the wiring cover 236 may be composed of two or more members.
  • the sensor unit 220 is provided with a wiring housing portion 228 that houses wiring 227, and a wiring cover 236 that covers wiring 234 extending from the wiring housing portion 228 to the box 101 (wiring on the sensor substrate 111 side). Therefore, the wirings 227 and 234 are not exposed, and breakage of the wirings 227 and 234 can be suppressed.
  • the connected connectors 233 and 235 may be accommodated in the wiring cover 236 instead of the wiring accommodating portion 228, or may be between the inner box 103 and the box body 101 (outer box). If it is inside the wiring housing part 228 or the wiring cover 236, it is preferable in that the connection work of the connector can be easily performed.
  • FIG. 18 is a top view of the lower sensor unit
  • FIG. 19 is a top view of the lower sensor unit with the cover member removed
  • FIG. 20 is the right half of the refrigerator showing a state in which a tray and a container are placed on the lower sensor unit
  • 21 is a sectional perspective view with the right half removed of the refrigerator showing a state in which the tray is placed on the lower sensor unit.
  • the sensor unit 220 (lower sensor unit 220c) is formed in a donut shape with its central portion hollowed out when viewed from above.
  • the lower sensor unit 220c includes a first attachment portion 241a (attachment portion 241) and a second attachment portion 241b (attachment portion 241) attached to the left and right bottom portions of the inner box 103, and a first attachment portion 241a and a second attachment portion 241b.
  • a connecting portion 242 for connecting is provided.
  • Two weight sensors 200 are provided on the first mounting portion 241a.
  • two weight sensors 200 are provided on the second mounting portion 241b. In Example 1, a total of four weight sensors 200 are provided, but the number is not limited to this.
  • one weight sensor 200 may be arranged in each of the first mounting portion 241a and the second mounting portion 241b. At least one or more weight sensors 200 (at least two or more in total) may be arranged on each of the first mounting portion 241a and the second mounting portion 241b.
  • the lower sensor unit 220c is fixed to the bottom of the inner box 103 with screws (not shown) or the like.
  • a plurality of inner box upper ribs 106a and a plurality of inner box lower ribs 106b extending in the front-rear direction are formed.
  • the first attachment portion 241a, the second attachment portion 241b, and the connection portion 242 are composed of an attachment portion main body 243 and a connection portion main body 245, which are open at the top, and a cover member 244 that covers the upper open portions of the attachment portion main body 243 and the connection portion main body 245. It has A space is formed in the first attachment portion 241a, the second attachment portion 241b, and the connection portion 242. As shown in FIG. becomes the wiring accommodating portion 248 of the . Also, four weight sensors 200 are arranged in the wiring housing portion 248 , and one of the wirings 247 is connected to each weight sensor 200 . The other end of the wiring 247 is pulled out from the wiring accommodating portion 248 , drawn into the box 101 , and electrically connected to the sensor substrate 111 .
  • the lower sensor unit 220c includes a tray 251 and a container 105e placed above the tray 251.
  • the container 105e accommodates a content, and the weight sensor 200 detects the weight of the content.
  • the container 105 e is placed on the tray 251 , but the container 105 e may be removed and the contents may be placed on the tray 251 .
  • the tray 251 or the container 105e receives and places a content, and a load is applied to the tray 251 or the container 105e, the central portion of the tray 251 or the container 105e deforms so as to protrude downward.
  • the lower sensor unit 220c has a ring shape when viewed from the top, and the central portion is a gap. In this way, the donut shape is formed to prevent the deformed central portion of the tray 251 or the container 105e from coming into contact with the lower sensor unit 220c. With this configuration, even if the central portion of the tray 251 or the container 105e is deformed so as to protrude downward, the deformed central portion does not come into contact with the lower sensor unit 220c. 200 detection accuracy can be ensured.
  • the weight sensor 200 has a rectangular shape when viewed from above, and is arranged so that its longitudinal direction extends along the horizontal direction of the box 101 . By arranging the weight sensors 200 in this way, the weight sensors 200 are brought to the front, back, left, and right of the inner case 103 .
  • FIG. 22 is a see-through external perspective view of the refrigerator showing the connection relationship between the lower sensor unit and wiring.
  • FIG. 23 is a cross-sectional perspective view with the left half of the refrigerator removed, and
  • FIGS. 24 to 26 are enlarged views of the XXIV section of FIG.
  • the lower sensor unit 220c is fixed to the bottom of the inner box 103 of the refrigerator as described above.
  • a mounting portion opening 252 that opens upward is formed in the front-rear direction central portion of the first mounting portion 241a.
  • the other end of the wiring 247 housed in the wiring housing portion 248 of the first mounting portion 241a is pulled out from the mounting portion opening 252 and exposed to the outside.
  • a male connector 253 is provided at the other end of the wiring 247 .
  • one end of the wiring 254 is electrically connected to the sensor substrate 111, and the wiring 254 from the sensor substrate 111 passes between the box body 101 and the inner box 103 (FIG. 22) and is formed on the wall surface of the inner box 103. It is pulled out from the notched opening 115 and exposed to the outside.
  • a female connector 255 is provided at the other end of the wiring 254 .
  • a wiring cover 256 is arranged above the lower sensor unit 220c so as to cover the connectors 253 and 255 and the wiring 254. As shown in FIG. The wiring cover 256 is arranged to connect the mounting portion opening 252 and the notch opening 115 to form a space for accommodating the wiring 254 . Then, the portion of the wiring cover 256 located at the first attachment portion 241a is fixed with the screw 257 .
  • the wiring cover 256 may be composed of two or more members.
  • the lower sensor unit 220c is formed with a wiring housing portion 248 for housing the wiring 247, and a wiring cover 256 is provided to cover the wiring 254 extending from the wiring housing portion 248 to the box body 101 (the wiring on the sensor substrate 111 side). Since the wirings 247 and 254 are provided, the wirings 247 and 254 are not exposed, and disconnection of the wirings 247 and 254 can be suppressed.
  • FIG. 27 is a left side view of the container
  • FIG. 28 is an enlarged view of the XXVIII portion of FIG. 27, and
  • FIG. 29 is an enlarged view of the XXIX portion of FIG.
  • FIG. 30 is an enlarged view of the XXX part of FIG. 29, and
  • FIG. 31 is a bottom perspective view of the container as seen obliquely from below.
  • 32 is an enlarged view of the XXXII portion of FIG. 4
  • FIG. 33 is an enlarged view of the XXXIII portion of FIG.
  • the following description is for the upper sensor unit 220a and the middle sensor unit 220b. The same can be done for the lower sensor unit 220c.
  • a rail 249 is provided. This guide rail 249 extends along the front-rear direction and guides the container 105 .
  • the guide rail 249 is provided with a notch portion 250 partially notched. At the position of the notch 250, the weight sensor 200 is arranged in front of each of the first mounting portion 221a and the second mounting portion 221b. Behind the rear end portion 249a of the guide rail 249, a weight sensor 200 is arranged behind each of the first mounting portion 221a and the second mounting portion 221b.
  • the bottom surface (lower surface of the mounting surface) of the container 105 is provided with sensor contact portions 120 (front sensor contact portion 120a, rear sensor contact portion 120b) exposed or projecting downward. .
  • the lengths in the front-back direction and the left-right direction of the rear sensor contact portion 120b are longer than those of the front sensor contact portion 120a.
  • bottom guide ribs 121 are formed along the front-rear direction on the bottom of the container 105 .
  • the bottom guide rib 121 is formed inside the front sensor contact portion 120a and the rear sensor contact portion 120b in the left-right direction.
  • the bottom guide rib 121 extends, for example, over a length equal to or longer than the front-rear distance from the front sensor contact portion 120a to the rear sensor contact portion 120b.
  • a sliding portion 122 that slides in contact with the guide rail 249 is provided between the front sensor contact portion 120a and the bottom guide rib 121.
  • the container 105 can be pulled out in the front-rear direction from the inner box 103 of the refrigerator. At that time, the container 105 slides on the guide rail 249 with the sliding portion 122 and the rear sensor contact portion 120b.
  • the rear sensor contact portion 120 b is placed on the front end portion of the guide rail 249 . Then, when the container 105 is pushed along the guide rail 249 , the rear sensor contact portion 120 b drops from the guide rail 249 behind the guide rail 249 and is placed on the weight detection portion 206 of the weight sensor 200 .
  • the sliding portion 122 drops from the guide rail 249 at the notch portion 250 of the guide rail 249 and is placed on the weight detection portion 206 of the weight sensor 200 .
  • the container 105 is installed on the weight sensor 200 .
  • the rear sensor contact portion 120b passes through the notch portion 250 when moving on the guide rail 249, but the length of the rear sensor contact portion 120b in the front-rear direction is longer than the length of the notch portion 250 in the front-rear direction. Therefore, the rear sensor contact portion 120b does not fall off the guide rail 249 at the notch portion 250. As shown in FIG.
  • side ribs 123 are formed on both side surfaces of the container 105 so as to protrude in the left-right direction and extend in the front-rear direction.
  • the side rib 123 is inserted into the space formed between the inner box upper rib 106a and the inner box lower rib 106b formed in the inner box 103 when the container 105 is attached to a place where the sensor unit 220 is located. At this time, the side rib 123 does not contact the inner box upper rib 106a and the inner box lower rib 106b. Also, even if the sliding portion 122 and the rear sensor contact portion 120b fall off the guide rail 249, the side rib 123 does not contact the inner box upper rib 106a and the inner box lower rib 106b.
  • the container 105 is only placed on the weight sensor 200 without being fixed to the inner box 103 , for example, if a load exceeding the allowable amount is applied to the front end or rear end of the container 105 , the rear or front of the container 105 moves upward and tilts, and the container 105 may fall from the inner box 103 .
  • the side ribs 123 come into contact with the inner box upper rib 106a and the inner box lower rib 106b, and the upward movement of the rear or front of the container 105 is restricted. Inclination of the container 105 can be suppressed, and dropping of the container 105 from the inner box 103 can be suppressed.
  • the inner box 103 is formed with a discharge port 108 for blowing cold air into the refrigerator.
  • the discharge port 108 is installed so that the cold air 125 blown out is directed toward the center of the inner box 103 . That is, in the first embodiment, direct contact with the weight sensor 200 by the cold air 125 blown out from the outlet 108 is suppressed. With this configuration, in the first embodiment, the weight sensor 200 is less likely to be affected by the temperature, and the detection accuracy of the weight sensor 200 can be ensured.
  • the direction in which cool air is blown from the outlet 108 can be considered, for example, as the direction in which the wind velocity from the outlet 108 is substantially the highest.
  • a temperature sensor (not shown) may be arranged near the weight sensor 200 . This is because the detection value of the weight sensor 200 also depends on the temperature, and the temperature detected by the inside temperature sensor 110 and the temperature near the weight sensor 200 may not match. The detection value of the weight sensor 200 can be corrected using the detection value of this temperature sensor. Of course, the value detected by the internal temperature sensor 110 may also be used.
  • both the weight sensors 200 and the temperature sensor used for correcting the detection value of the weight sensors 200 can be placed at positions that directly receive the cold air from the discharge port 108 or at positions that do not directly receive it. can.
  • the internal temperature sensor 110 is used as the temperature sensor, it is preferable that both of them are positioned so as not to receive cold air directly from the viewpoint of securing the detection accuracy of the internal temperature.
  • a temperature sensor different from the internal temperature sensor 110 is arranged near the weight sensor 200 as the temperature sensor, it may be located at a position where the cold air is directly received or not.
  • FIG. 34 is a side view of the container 105 on which the contents are placed. Here, it is a left side view. Contents are placed on the front side of the container 105 . Since the weight detection part 206 of the weight sensor 200 is a support point of the container 105, it is preferable that the weight detection part 206 be positioned outside the space where the contents are placed when viewed from the top in order to suppress the inclination of the container 105. . However, there is a possibility that a contained object may be placed outside the weight detection unit 206 depending on the usage conditions of the user. Therefore, it is preferable to design the container 105 so that it does not tilt even when an object is placed outside the weight detection unit 206 .
  • X1 is the distance from the weight detection unit 206 to the center of gravity of the contents
  • X2 is the distance from the weight detection unit 206 to the center of gravity of the container 105
  • W1 is the weight of the contents
  • W2 is the weight of the container 105 .
  • the container 105 When an object is placed on the container 105, the container 105 will not tilt if the following conditions are met.
  • FIG. 36 is a cross-sectional view along line XXXVI-XXXVI of FIG. FIG. 35 depicts the right side.
  • a hot gas pipe 130 through which the refrigerant compressed by the compressor in the refrigerating cycle flows is arranged on the side surface of the refrigerator 100 in order to suppress condensation on the box 101 .
  • a foam heat insulating material 140 such as urethane foam is filled between the box 101 and the inner box 103 .
  • the hot gas pipe 130 is arranged close to the box 101 side. Since high-temperature refrigerant flows through the hot gas pipe 130 , the weight sensor 200 may be affected by heat from the hot gas pipe 130 .
  • the hot gas pipe 130 is brought closer to the box body 101 side, and the foam heat insulating material 140 is arranged between the hot gas pipe 130 and the inner box 103 (weight sensor 200). Therefore, the heat from the hot gas pipe 130 is mitigated by the foamed heat insulating material 140, so that the influence of the heat on the weight sensor 200 is suppressed, and the detection accuracy of the weight sensor 200 can be maintained.
  • the weight sensor 200 is not arranged on the projection of the hot gas pipe 130 in a side view. As shown in FIG. 35, hot gas pipe 130 is folded back at the upper and lower end sides of refrigerator 100 and arranged along the vertical direction. Weight sensors 200 (preferably strain sensors 201a and 201b) are positioned between hot gas pipes 130 adjacent in the front-rear direction when refrigerator 100 is viewed from the side. By configuring in this way, the influence of heat received by the weight sensor 200 can be suppressed, and the detection accuracy of the weight sensor 200 can be maintained.
  • the weight sensor 200 and the temperature sensor used for correcting the detection value of the weight sensor may not be arranged on the projection of the hot gas pipe 130, or may be arranged together. Similar to the relationship with the discharge port described above, when using the internal temperature sensor 110 as the temperature sensor, it is preferable not to place both of them on the projection. If a temperature sensor different from the internal temperature sensor 110 is used as the temperature sensor, either one may be used.
  • FIG. 1 the weight sensor 200 is arranged on the sensor unit 220 , but in the second embodiment, the weight sensor 200 is arranged on the shelf 260 .
  • FIG. 37 is an external perspective view of the shelf viewed from above
  • FIG. 38 is an external perspective view of the shelf viewed from below
  • FIG. 39 is an exploded perspective view of the shelf viewed from below.
  • the shelf 260 includes a mounting portion 260a and a weir portion 260b higher than the mounting portion 260a.
  • a mounting part body 223 that is open at the top and mounted on the left and right sides of the inner box 103, and a connection part body 225 that connects the mounting part body 223.
  • a plurality of downwardly opening sensor openings 271 are formed in the mounting portion main body 223 .
  • the weight sensor 200 is arranged at the position of the sensor opening 271 so that the weight detection part 206 of the weight sensor 200 protrudes downward from the sensor opening 271 .
  • the upper portions of the mounting portion main body 223 and the connecting portion main body 225 are covered with a dam portion 260b to form a first mounting portion 221a, a second mounting portion 221b, and a connecting portion 222 that connects the first mounting portion 221a and the second mounting portion 221b.
  • a space is formed inside the first attachment portion 221a, the second attachment portion 221b, and the connection portion 222, and this space serves as a wiring accommodation portion 228 for the wiring 227 electrically connecting the weight sensor 200 and the sensor substrate 111. .
  • the first attachment portion 221a, the second attachment portion 221b, the connection portion 222, and the weir portion 260b constitute a sensor unit that accommodates the weight sensor 200.
  • the second embodiment includes a total of four weight sensors 200, the number is not limited to this.
  • one weight sensor 200 may be arranged in each of the first mounting portion 221a and the second mounting portion 221b. At least one weight sensor 200 is preferably arranged on each of the first mounting portion 221a and the second mounting portion 221b.
  • the shelf 260 may be formed in a triangular shape with one or more weight sensors 200 on each side.
  • weight sensors 200 are arranged in the wiring housing portion 228 , and one end of a wiring 227 is connected to each weight sensor 200 .
  • the other end of the wiring 227 is pulled out from a connecting portion opening 232 formed below the wiring accommodating portion 228 .
  • a male connector 233 is provided at the other end of the wiring 227 and is connected to a female connector 235 (wiring 234) from the sensor board 111 (not shown).
  • the wiring lead-in method the same structure as that shown in FIGS. 15 to 17 of the first embodiment can be used.
  • the weight sensor 200 when the weight sensor 200 is installed on the shelf 260, it is preferable to fix the shelf 260 to the inner box 103 side so as not to affect the weight detection of the weight sensor 200.
  • the mounting portion main body 223 is fixed to the fixing member 229 (Fig. 9) with a predetermined gap.
  • the weight sensor 200 is fixed downward to the weir portion 260 b so that the weight detection portion 206 faces downward, and the weight detection portion 206 protrudes from the sensor opening 271 .
  • the strain of the load cell 201 changes according to the weight of the content placed on the placement portion 260a. to detect
  • the wiring accommodating portion 228 for accommodating the wiring 227 is formed in the shelf 260, and the wiring from the wiring accommodating portion 228 to the box 101 is covered. disconnection can be suppressed.
  • the sensor unit 220 is connected to the box 101 side by wiring 227, a battery, a WLAN board, etc. may be mounted in the sensor unit 220 and connected to the main control board 109 wirelessly. In this case, it is not necessary to provide the wiring cover 236 unlike the first and second embodiments.
  • the shelf 260 as in the second embodiment not only at a designated location inside the storage, but also at a desired location inside the storage, or outside the storage as long as it is within a wireless range.
  • the electrical wiring is fitted into a sensor-side waterproof connector 58 provided on the rear side of the shelf and connected to a body-side waterproof connector 59 of the refrigerator 51 (0026, 0027, 0031, 0032, FIG. 2, etc.). It is a structure in which the upper shelf 54, the lower shelf 55, and the clearance space are pulled out together (0032). It is assumed that weight detection is performed by a single strain gauge sensor 56 (0012, 0036, etc.). In order to install a sensor in each of the four corners of the shelf support or in the vicinity thereof in part or in whole, it is necessary to electrically connect the sensor and the control circuit unit, but in the technology described in Japanese Patent Application Laid-Open No.
  • Japanese Patent Laying-Open No. 2013-124798 discloses a housing structure for improving detection accuracy by arranging a single strain gauge sensor 56 in the center of the upper shelf 54, and is based on the premise of using a plurality of sensors. It does not describe or suggest any method.
  • the sensor unit is a first mounting portion that accommodates at least one of the weight sensors and at least a portion of wiring connected to the weight sensor and extends in a direction along the wall surface of the storage chamber; a second mounting portion connected to the first mounting portion and housing at least one of the weight sensors and at least part of the wiring connected to the weight sensor;
  • the storage warehouse wherein the sensor unit is provided below the shelf or the container and is separate from the shelf or the container.
  • the sensor unit includes a cover, A container in which a weight detection portion of the weight sensor is exposed or protrudes upward from the cover portion, and at least a part of the other portion is housed in a space below the cover portion of the sensor unit.
  • the sensor unit includes a connecting portion connecting the first mounting portion and the second mounting portion and extending in a direction different from the first mounting portion and the second mounting portion;
  • the connection portion is a container housing at least part of the wiring.
  • Appendix 1-4 In Appendix 1-1, A fixing member provided along the wall surface of the storage chamber, A container in which the sensor unit is fixed to the fixing member.
  • the fixing member is a metal member provided along the front-rear direction, Below the sensor unit, a folded portion is provided by folding the front tip portion toward the rear, A housing in which a tip portion of the fixing member is arranged between the lower surface of the sensor unit and the folded portion.
  • the sensor unit is formed with a connection opening for drawing out the wiring
  • the wall surface of the container is formed with a cutout opening for drawing out another wiring
  • One or more wiring covers connecting the connection opening and the notch opening, A container in which a connector attached to the wiring and/or the another wiring is housed in the sensor unit or the wiring cover.
  • Appendix 1-7 In Appendix 1-1, An inner box upper rib and an inner box lower rib extending in the front-rear direction are provided on the left and right sides of the wall surface of the storage room, comprising the container; The left side and/or right side of the container is provided with side ribs projecting from the left side and/or right side in the left-right direction and formed along the front-rear direction, The side rib is positioned between the inner box upper rib and the inner box lower rib.
  • Appendix 1-8 In Appendix 1-1, Guide rails extending in the front-rear direction and protruding upward are provided on upper portions of the first mounting portion and the second mounting portion provided on the left and right sides of the sensor unit, respectively, The guide rail is provided with a notch portion that is partially notched, The storage container in which the weight sensor is arranged at the position of the notch.
  • the weight sensor is provided on each of the front and rear sides of the first mounting portion and the second mounting portion provided on the left and right sides of the sensor unit, A guide rail extending in the front-rear direction and protruding upward is provided on the upper portions of the first mounting portion and the second mounting portion, The guide rail is provided with a notch portion that is partially notched, The storage box in which the weight sensor is arranged at a position on the rear end side of the guide rail.
  • Appendix 1-10 In Appendix 1-2, The weight detection unit is movable, A protruding portion that protrudes upward is formed in a portion of the sensor unit located around the weight detection portion, A container in which a gap is formed between the outer peripheral portion of the weight detection portion and the protrusion.
  • Appendix 1-11 In Appendix 1-10, A guide rail extending in the front-rear direction and protruding upward is provided on the upper portions of the first mounting portion and the second mounting portion, A storage container in which a drainage part is formed in the projecting part by notching a part thereof, and the drainage part is positioned in the notch part of the guide rail.
  • the sensor unit is formed with a connection opening for drawing out the wiring, A notch opening is formed on the wall of the container to pull out another wiring, One or more wiring covers connecting the connection opening and the notch opening, The storage box in which the sensor unit and the wiring cover are separated from each other.
  • the sensor unit includes a mounting body, The weight detection portion of the weight sensor is exposed or protrudes downward from the mounting portion main body.
  • Appendix 1-15 In Appendix 1-1 or 1-12, A container comprising the above-mentioned container, wherein the height of the side wall of the container is 3 cm or more and 9 cm or less.
  • Appendix 2-4 In any one of Appendix 2-1 to 2-3, The weight sensor is provided on the left wall side or the right wall side of the storage chamber, The front of the storage chamber is open, The storage chamber in which the longitudinal direction of the load cell is arranged along the left wall or the right wall of the storage chamber.
  • Appendix 2-5 In any one of Appendix 2-1 to Appendix 2-3, The weight sensor is arranged at a position corresponding to the shelf or container arranged at the bottom of the storage room, The front of the storage chamber is open, A container in which the longitudinal direction of the load cell is arranged along the lateral direction of the storage chamber.
  • a temperature sensor is usually arranged in the storage compartment of the refrigerator to detect the temperature in the storage compartment. Moreover, since the detection value of the weight sensor also depends on the ambient temperature, it is desirable to correct the detection value using a temperature sensor in the storage compartment where the weight sensor is arranged.
  • the storage compartment is provided with an outlet for supplying cool air, and the wall surface of the refrigerator is provided with a hot gas pipe or the like for suppressing dew condensation due to the temperature difference between the refrigerator and the outside. If the temperature influences given by these are greatly different between the weight sensor and the temperature sensor, the correction cannot be performed accurately.
  • the aforementioned Japanese Patent Laying-Open No. 2007-010208 does not consider such a point.
  • the refrigerator interior temperature sensor is used for correcting the detection value of the weight sensor and for controlling a cooling fan and/or a compressor for compressing a refrigerant used for blowing air to the storage compartment.
  • the refrigerator wherein the weight sensor and the temperature sensor are arranged at positions avoiding or not avoiding the cool air discharge direction of the discharge port.
  • the refrigerator wherein the weight sensor and the temperature sensor are both arranged at positions overlapping with or not overlapping with the hot gas pipe in a front view of the surface.
  • Appendix 4-2 In Appendix 4-1, The folding part extends over the upper side, the front side, and the lower side of the tip part.
  • Appendix 4-3 In Appendix 4-1, The storage container, wherein the folded portion is made of a softer material than the tip portion.
  • Appendix 5-2 In Appendix 5-1, When the shelf or the container slides on the guide rail and moves backward from a position in front of the weight sensor, the sensor contact portion moves backward from a height higher than the weight sensor to move the weight detection portion. and moves further downward to contact the weight detection unit from above.
  • the sensor contact portion includes a front sensor contact portion that can contact the weight detection portion of the weight sensor on the front side and a rear sensor contact portion that can contact the weight detection portion of the weight sensor on the rear side,
  • the sensor contact portion moves rearward from a position forward of the front weight sensor, the front and rear sensor contact portions move toward the front weight sensor.
  • a container that passes above and moves downward on the weight sensor on the rear side and contacts the weight detection part of the weight sensor on the rear side from above.
  • the shelf or the container has side ribs protruding laterally on its sides, a side wall of the chamber includes a lower rib protruding below the side rib;
  • the side rib is spaced apart from the lower rib,
  • the shelf or the container is tilted when the shelf or the container is sliding on the guide rail, or when the sensor contact portion is in contact with the weight detection portion , a container disposed at a position in contact with the side ribs.
  • the shelf or the container has side ribs protruding laterally on its sides, a side wall of the chamber includes a lower rib protruding below the side rib;
  • the side rib is spaced apart from the lower rib, Separately from the guide rail, a structure capable of supporting another shelf or another container above the guide rail, The lower rib is disposed between the guide rail and the structure in the vertical direction.
  • the shelf or the container has side ribs protruding laterally on its sides, a side wall of the chamber includes an upper rib projecting above the side rib;
  • the side rib is spaced apart from the lower rib, Separately from the guide rail, a structure capable of supporting another shelf or another container above the guide rail, The upper rib is arranged vertically between the guide rail and the structure.
  • Japanese Patent Application Laid-Open No. 9-139148 which relates to a pressure-sensitive sensor used in a device that detects and controls changes in pressure due to manual operation, discloses an elastic pressing body 13 for pressing a pressure-sensitive rubber 12 against a conductor pattern. (0001, 0010, FIG. 1).
  • Japanese Unexamined Patent Application Publication No. 9-139148 is a structure on the premise that a force of the level of human manual operation is applied. On the other hand, assuming a weight sensor that is used to detect the weight of stored foodstuffs in a container such as a refrigerator, it is necessary to assume a higher level of food load than that in Japanese Patent Application Laid-Open No. 9-139148.
  • the inventors have proposed a structure for detecting a load, which tends to be larger than that in Japanese Patent Application Laid-Open No. 9-139148.
  • the study was conducted including a structure different from that in the publication.
  • the sensor cover receives part of the load, which is transmitted to other parts in contact with the sensor cover to the sensor side.
  • the inventors have found the problems that the load is dispersed and the detection accuracy is lowered, and that if the sensor cover is made of a soft material, the risk of breakage of the sensor cover increases.
  • Appendix 6-2 In Appendix 6-1, The weight sensor, wherein the sensor cover has a hardness of 70 or less and/or a thickness of 2.5 mm or less.
  • Appendix 6-3 A sensor unit containing the weight sensor according to Appendix 6-1 or 6-2, A cover member located on the opposite side of the case body across an end portion of the sensor cover that is in contact with the case body, The cover member presses the end portion toward the case body.
  • Appendix 6-4 In Appendix 6-1 or 6-2, The weight sensor, wherein an edge of the sensor cover facing the side surface of the weight detection section has a gap with respect to the weight detection section.
  • Appendix 6-5 In Appendix 6-1 or 6-4, A weight sensor in which the rim does not extend 360 degrees around the weight sensing part and thus partially functions as a drain hole.
  • Appendix 6-6 In Appendix 6-1 or 6-2, A weight sensor having a washer interposed between the sensor cover and the weight detection unit.

Abstract

Une unité de stockage comprend : une caisse interne (103) destinée à former une chambre de stockage comportant une ouverture vers l'avant ; un récipient (105) disposé dans la chambre de stockage ; une pluralité de capteurs de poids (200) destinés à recevoir les poids d'articles stockés placés dans le récipient (105) ; et une unité de détection (220). L'unité de détection (220) comporte : une première partie de montage (221a) destinée à loger au moins un capteur de poids (200) et au moins une partie du câblage de connexion au capteur de poids (200) et s'étendant dans une direction le long de la surface de paroi de la chambre de stockage ; et une seconde partie de montage (221b) reliée à la première partie de montage (221a), et destinée à loger au moins l'autre capteur de poids (200) et au moins une partie du câblage (227) de connexion au capteur de poids (200). En outre, l'unité de détection (220) est disposée au-dessous du récipient (105) et séparée du récipient (105).
PCT/JP2021/020520 2021-01-22 2021-05-28 Unité de stockage WO2022157999A1 (fr)

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JP2021008582A JP7352586B2 (ja) 2021-01-22 2021-01-22 収容庫
JP2021-008582 2021-01-22
JP2021-012642 2021-01-29
JP2021012642A JP2022116465A (ja) 2021-01-29 2021-01-29 収容庫

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KR20040064418A (ko) * 2003-01-13 2004-07-19 삼성전자주식회사 냉장고의 식품 잔여량 표시장치 및 표시방법
KR20160021397A (ko) * 2014-08-14 2016-02-25 계명대학교 산학협력단 냉장고
CN205079852U (zh) * 2015-10-13 2016-03-09 龙微科技无锡有限公司 称重装置和冰箱
JP2016511392A (ja) * 2013-01-11 2016-04-14 タグネティックス，インコーポレーテッド 在庫切れセンサ
KR20160048544A (ko) * 2014-10-24 2016-05-04 주식회사 대유위니아 냉장고 제어 장치
JP2019502080A (ja) * 2016-01-04 2019-01-24 エルジー エレクトロニクス インコーポレイティド 冷蔵庫

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040064418A (ko) * 2003-01-13 2004-07-19 삼성전자주식회사 냉장고의 식품 잔여량 표시장치 및 표시방법
JP2016511392A (ja) * 2013-01-11 2016-04-14 タグネティックス，インコーポレーテッド 在庫切れセンサ
KR20160021397A (ko) * 2014-08-14 2016-02-25 계명대학교 산학협력단 냉장고
KR20160048544A (ko) * 2014-10-24 2016-05-04 주식회사 대유위니아 냉장고 제어 장치
CN205079852U (zh) * 2015-10-13 2016-03-09 龙微科技无锡有限公司 称重装置和冰箱
JP2019502080A (ja) * 2016-01-04 2019-01-24 エルジー エレクトロニクス インコーポレイティド 冷蔵庫

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