JP7339015B2 - refrigerator - Google Patents

Description

Embodiments of the present invention relate to refrigerators.

2. Description of the Related Art Conventionally, a refrigerator has been provided with a door opening/closing detection device in order to control an interior lamp for illuminating the inside of the refrigerator based on the opening/closing of the refrigerator door.
Specifically, for example, in a relatively small one-door refrigerator used in a hotel or the like, a push-in type detection device is provided in the refrigerator body. This detection device includes a pushing pin that can move in a pushing direction, and a switch section that performs a switching operation as the pushing pin is pushed. When the refrigerator door is closed, the tip of the push pin comes into contact with the back surface of the door and moves to the push-in position. It is designed to return to the position it was in before being crushed.

JP 2017-32206 A

In the above-described detection device, if the abutting portion at the tip of the push pin and the abutted portion on the rear surface of the door do not correspond to each other, there is a possibility that the opening and closing of the door cannot be detected. That is, for example, the abutted portion is slightly protruded from the back surface (inner plate) of the door due to the relationship with the operation stroke of the push pin, but the door is assembled to the refrigerator body in the wrong direction. As a result, the tip of the plunger portion may not come into contact with the inner plate of the door. Therefore, in the assembly process, it is necessary to identify the direction of the door or the direction of the inner plate of the door before performing the work. There is a problem that work efficiency is inferior, such as confirmation is required.

In view of the above, the present invention provides a refrigerator which is equipped with a door open/close detection means and which is capable of preventing door assembly errors and improving working efficiency.

A refrigerator according to an embodiment includes a refrigerator main body, a door for opening and closing a front opening of the refrigerator main body, the door having a square outer shape matching the front opening , and open/close detection means for detecting opening and closing of the door. With the front end portion of the refrigerator main body or the inner peripheral portion of the front opening as the main body side peripheral portion, the open/close detection means is provided with a door side peripheral portion opposite to the main body side peripheral portion on the back surface of the door and a main body side peripheral portion. The peripheral portion includes a detected portion provided in one peripheral portion and a detection portion provided in the other peripheral portion, and the door-side peripheral portion is symmetrical about the center of the door. As points, the four detected parts or the four detecting parts are arranged in positions that are point symmetrical with each other and that are vertically symmetrical and leftwardly symmetrical about a straight line passing through the center of the door as an axis of symmetry. there is

The front view of the refrigerator in 1st Embodiment Front view showing the refrigerator door omitted Vertical side view showing the internal configuration of the refrigerator Perspective view of the top of the refrigerator with the door open Rear view of a single door showing a pair of detected parts on the back of the door Schematic diagram showing the refrigeration cycle in a refrigerator Block diagram showing the electrical configuration of a refrigerator FIG. 11 is a rear view of a single door for explaining an arrangement example of detected parts in the second embodiment; An enlarged plan view showing a detected part and a detection part in the third embodiment.

A plurality of embodiments of the present disclosure applied to a one-door refrigerator will be described below with reference to the drawings. In addition, in each embodiment, substantially the same components are denoted by the same reference numerals, and the description thereof is omitted.

<First embodiment>
As shown in FIGS. 1 to 3, a refrigerator 1 of this embodiment includes a rectangular box-shaped refrigerator body 2 with an open front surface, and one door 3 for opening and closing the front opening 2a. In this embodiment, the door 3 for opening to the right is taken as an example, in which the side where the hinge portion 10 is located is the right side in the refrigerator 1 shown in FIG. 1 and the side opposite to the hinge portion 10 is the left side. Further, the direction orthogonal to the plane of FIG. 1 is defined as the front-rear direction, and the front side of the plane of FIG.

The refrigerator main body 2 is composed of a heat insulating box body in which a heat insulating material (for example, urethane foam material) (not shown) is filled between an inner box 4 made of synthetic resin and an outer box 5 made of steel plate shown in FIG. A storage chamber 6 is formed in the refrigerator main body 2 for storing storage items such as food and beverage containers.
At the upper part of the storage chamber 6, a cooler 7 is provided that is L-shaped when viewed from the front in FIG. In the storage room 6, the stored items are cooled by a so-called direct cooling system in which cool air generated by the cooler 7 is circulated by natural convection. Although not shown, an ice-making tray is placed on the cooler 7, and a dew tray for receiving dew generated by the cooler 7 is arranged immediately below the cooler 7. As shown in FIG.

As shown in FIG. 3, the storage chamber 6 is formed in a stepped shape by the bottom portion 4a of the inner box 4 and the shelf portion 4b. Auxiliary shelf 8 is detachably attached. As a result, for example, the beverage container can be accommodated in an upright state on the bottom 4a like the PET bottle x1 in FIG. state can be accommodated.

As shown in FIGS. 2 and 4 , a mounting base portion 9 is provided at the upper corner of the storage chamber 6 to the left of the cooler 7 . The mounting base portion 9 has a box shape elongated in the front-rear direction, and a push pin 11a of a door open/close detection device 11 and a stop switch 12 are arranged side by side on the front portion 9a.

The door open/close detection device 11 includes a pushing pin 11a (see FIG. 9) movable in the front-rear direction, which is the pushing direction, and a switch portion (not shown) that performs a switch operation as the pushing pin 11a moves in the pushing direction. The push-in pin 11a has a push-in position (see FIG. 3) in which it contacts a detected portion 31 on the rear surface of the door 3 and is pushed backward (see FIG. 3), and a protruding position (see FIG. 3) in which it is pushed forward by a biasing member (not shown). position shown in FIG. As a result, the door opening/closing detection device 11 switches between the closed state in which the front opening 2a is blocked by the door 3 and the front opening 2a in the door 3 by the switching operation of the switch portion accompanying the movement of the push-in pin 11a in the front-rear direction. The open state in which the is opened is detected. In this manner, the door open/close detector 11 is positioned in the inner peripheral portion of the inner box 4 where the mounting base portion 9 exists, that is, in the inner peripheral portion of the front opening 2a (main body side peripheral portion 20), and detects the detected portion 31 of the door 3. It functions as a detection unit facing the .

In this case, as shown in FIG. 3, the front surface portion 9a of the mounting base portion 9 is arranged so as to correspond to the operation stroke of the push pin 11a and the relative positional relationship with the detected portion 31 on the rear surface of the door 3. , located behind the front end portion 2</b>F of the refrigerator body 2 . The front end portion 2F of the refrigerator main body 2 is formed by the flange portion of the front end portion of the inner box 4, and has a square shape when viewed from the front in FIG. That is, the front end portion of the inner box 4 is formed into a flange shape projecting toward the outer case 5 side to form a frame shape. Further, the front frame portion 2</b>F of the refrigerator main body 2 or the inner peripheral portion of the front opening 2 a is referred to as a main body side peripheral portion 20 .

The stop switch 12 of the mounting base portion 9 is a switch for forcibly stopping the operation of the compressor 14 that constitutes the refrigerating cycle in the refrigerator 1, and is operated by the user's selection. Compressor 14 is provided in machine room 13 (see FIG. 3 ) in the lower rear portion of refrigerator body 2 . Here, the refrigerating cycle will be explained.

As schematically shown in FIG. 6, the refrigerating cycle consists of a compressor 14, a heat radiation pipe 15, a dryer 16, a capillary tube 17, a cooler 7, and a suction pipe 18 in the order of refrigerant flow. Connected and configured. In such a refrigeration cycle, the compressor 14 compresses the gaseous refrigerant into a high-pressure gaseous refrigerant, the heat radiation pipe 15 radiates heat from the gaseous refrigerant from the compressor 14 and converts it into a liquid refrigerant (condenses), and the capillary tube 17 , the liquid refrigerant supplied from the heat radiation pipe 15 through the dryer 16 is decompressed into a low-pressure liquid refrigerant. The cooler 7 evaporates the low-pressure liquid refrigerant supplied from the capillary tube 17 to generate cool air for cooling the storage chamber 6, and the suction pipe 18 compresses the refrigerant supplied from the cooler 7. It is designed to be returned to the machine 14.

As illustrated in FIG. 6, the heat radiation pipe 15 is configured to connect between the refrigerant outlet of the compressor 14 in the machine room 13 and the refrigerant inlet of the dryer 16 in the machine room 13. A middle portion of 15 extends along the inner surface of the outer case 5 and the inner surface of the front frame portion 2F of the refrigerator body 2 .

Specifically, the heat radiation pipe 15 is arranged from the refrigerant outlet of the compressor 14 to the inner surface of the right side of the outer casing 5 in a meandering shape in the vertical direction from the back side toward the front frame portion 2F side. It is arranged linearly from the right side to the left side on the inner surface of the lower side portion 2Fa (flange portion of the inner box 4) of the frame portion 2F, and is further arranged on the inner surface of the left side portion of the outer box 5 from the front frame portion 2F side. It is arranged in a meandering shape in the vertical direction toward the back plate side, and is finally arranged so as to be connected to the refrigerant inlet of the dryer 16 .

The heat radiation pipe 15 is fixed to the inner surface of the outer case 5 and the inner surface of the front frame portion 2F by adhesive tape. For example, as shown in FIG. 3, an aluminum tape 19 as an adhesive tape is attached to the inner surface of the lower side portion 2Fa of the front frame portion 2F so as to cover the heat dissipation pipe 15 over both the left and right ends. In this way, the aluminum tape 19 is in contact with both the heat radiating pipe 15 and the inner surface of the lower side portion 2Fa, so that the aluminum tape 19 is tightly arranged as a heat transfer portion that thermally connects the both 15 and 2Fa. As a result, the anti-condensation performance of the lower side portion 2Fa can be improved, and deformation of the lower side portion 2Fa due to shrinkage of the urethane foam material can also be prevented.

A controller 25 (see FIG. 3) is provided on the back side of the refrigerator main body 2 so as to be positioned above the machine room 13 . The control device 25 is mainly composed of a microcomputer, for example, and controls the overall operation of the refrigerator 1 .
Specifically, as shown in FIG. 7, the door open/close detection device 11, the stop switch 12, the temperature sensor 21, and the timer 22 are connected to the control device 25, and the compressor 14, the interior light 23, etc. are also connected. It is A temperature sensor 21 is provided in the storage chamber 6 so as to detect the internal temperature, and a timer 22 is mounted in the control device 25 for measuring time. The refrigerator interior light 23 is arranged to illuminate the interior of the refrigerator via a shade (translucent cover, not shown) provided on the side surface portion 9b of the mounting base portion 9. As shown in FIG.

The control device 25 executes a program stored in its own storage unit, and operates the compressor 14 based on the temperature detected by the temperature sensor 21, the time measured by the timer 22, the ON/OFF of the stop switch 12, etc. The storage chamber 6 is cooled by operating a refrigeration cycle including Further, based on the detection result of the door open/close detection device 11, the control device 25 turns on the interior light 23 when the door 3 is opened and turns off the interior light 23 when the door 3 is closed. Control.

Next, the configuration of the door 3 will be described with reference to FIGS. 4 and 5 as well. Here, FIG. 4 is a perspective view of the upper portion of the refrigerator 1 showing the door 3 and the hinge portion 10 with a two-dot chain line, and FIG. 5 is a rear view showing the door 3 alone. The refrigerator 1 of the present embodiment is a relatively small refrigerator used in a hotel, for example, and has a configuration in which a door pocket and the like of the door 3 are omitted in order to reduce the thickness of the refrigerator.

That is, first, the door 3 is supported by the refrigerator main body 2 so as to be rotatable in the left-right direction with the hinge portion 10 as a fulcrum. The hinge portion 10 includes an upper hinge 10a (see FIGS. 4 and 1) attached to the upper surface mounting portion 10Ra and a lower hinge 10b (see FIG. 1) attached to the lower surface mounting portion 10Rb on the front right side of the refrigerator body 2. It consists of Although illustration is omitted, the shaft portion of the upper hinge 10a and the shaft portion of the lower hinge 10b are arranged coaxially and serve as the fulcrum for opening to the right.

As shown in FIGS. 1, 3, and 5, the door 3 has an outer plate 3a and an inner plate 3b combined with a peripheral side frame 3c. used. The outer plate 3a of the door 3 is made of steel, for example, and the inner plate 3b is made of synthetic resin, for example. Further, for example, the upper and lower frame portions of the peripheral frame 3c are assembled as an upper cap 3c' and a lower cap 3c'' made of synthetic resin (see FIG. 3).

As shown in FIG. 5, the inner plate 3b on the rear surface of the door 3 is provided with a gasket 33 positioned slightly inside the outer edge thereof. The gasket 33 contacts the front frame portion 2F of the refrigerator body 2 when the door 3 is closed. A throat portion 34 is provided on the inner plate 3 b of the door 3 so as to be positioned on the inner peripheral side of the gasket 33 . The throat portion 34 of the present embodiment is projected toward the opening 2a so as to enter the front opening 2a of the refrigerator body 2 when the door 3 is closed and prevent cold air from flowing out. The projection dimension of the throat portion 34 (dimension 9 in the thickness direction of the door 3) is set to be smaller than the dimension of the throat portion 34 to which the door pocket, which is the storage portion for stored items, is fixed.

As a result, in the door 3, the region on the center C side of the throat portion 34 is a flat surface 35 without a storage portion such as a door pocket (see FIG. 5), thereby reducing the thickness. Further, as shown in FIG. 5, the height dimension H1 of the door 3 is set to, for example, about 500 mm, and the width dimension W1 is set to, for example, about 480 mm. (H1>W1).

A peripheral portion of the inner plate 3b of the door 3 along the gasket 33 or the throat portion 34 is a door-side peripheral portion 30 facing the front frame portion 2F of the refrigerator body 2 or the inner peripheral portion of the front opening 2a. A pair of detected portions 31 and 32 are provided in the door-side peripheral portion 30 . The pair of detected portions 31 and 32 are arranged in the door-side peripheral portion 30 at positions diagonal to the throat portion 34 as shown in FIG.

Specifically, in FIG. 5 , the detected portion 31 at the upper right corner is provided on the inner plate 3 b of the door 3 so as to face the pushing pin 11 a of the door opening/closing detection device 11 . As shown in FIGS. 3 and 5, the detected portion 31 has a rectangular block-like outer shape protruding from the inner plate 3b of the door 3 toward the push pin 11a (or the front opening 2a). In the detected portion 31, the surface facing the push pin 11a is a contacted surface 31a capable of coming into contact with the tip of the pin 11a. The to-be-detected portion 31 protrudes so that its abutted surface 31 a enters the front opening 2 a beyond the tip of the throat portion 34 .

In FIG. 5, the detected portion 32 at the lower left corner is provided at a point-symmetrical position with the detected portion 31 with the center C of the inner plate 3b of the door 3 as a symmetrical point. This point of symmetry is the point C at the center in the vertical direction and the center in the horizontal direction of the inner plate 3b, which is the center C of the inner plate 3b as viewed from the back side as shown in FIG. The detected portion 32 has the same rectangular block shape as the detected portion 31, and the detected portion 32 and the detected portion 31 are point-symmetrical with respect to the center C of the inner plate 3b. It is formed as a symmetrical shape. Therefore, as shown in FIG. 3, the projection length L2 of the detected portion 32 (abutted surface 32a) from the inner plate 3b is the same as the projection length L1 of the detected portion 31 (abutted surface 31a). is set (L1=L2).

The above door 3 has no door pocket, and even if the direction is changed up and down by 180 degrees, the appearance when viewed from the side of the outer plate 3a or the side of the inner plate 3b is substantially the same (see FIG. 1 or 5). The detectors 31 and 32 also have symmetry with the center C of the door 3 as a symmetrical point.

In this regard, the conventional refrigerator has only one detected portion on the door side, and the detected portion on the door side and the detection portion on the main body side of the refrigerator correspond to each other on a one-to-one basis. Therefore, when the door is assembled, if the inner plate is installed in the wrong vertical direction, the position of the part to be detected is displaced with respect to the detection part, resulting in problems such as being unable to detect the opening and closing of the door. Therefore, in the conventional assembly process, it is necessary to identify the direction of the door or the direction of the inner plate of the door before performing the work. There is a problem that work efficiency is inferior, such as the need to confirm the orientation.

On the other hand, in the assembly of the door 3 of this embodiment, even if the inner plate 3b is assembled with the direction changed by 180 degrees up and down before the urethane foam material is filled, a problem may occur. There is no That is, when the door 3 or the inner plate 3b in FIG. 5 changes its orientation by 180 degrees, the one detected portion 31 and the other detected portion 32 are exchanged with each other so that the other detected portion 32 is pushed in by the push pin 11a. It is arranged to face the Therefore, the assembly error of the door 3 can be eliminated, and there is no need to identify the vertical orientation of the door 3 or the inner plate 3b or to confirm the orientation after assembly, thereby simplifying the work. be able to.

As described above, the door 3 open/close detection means of the present embodiment includes the detected portions 31 and 32 provided in the door side peripheral portion 30 facing the main body side peripheral portion 20 on the rear surface of the door 3, and the main body side peripheral portion 20. A door opening/closing detection device 11 provided in a peripheral portion 20. In the door side peripheral portion 30, at least a pair of the detected portions 31 and 32 are arranged with the center C of the door 3 as a symmetrical point. They are arranged at points symmetrical.

According to this, when assembling the door 3, even if the door 3 or its back surface (inner plate 3b) is assembled with the direction changed by 180 degrees up and down, which of the pair of detected parts 31 and 32 One of them may be arranged to face the door opening/closing detection device 11 . Therefore, it is possible to eliminate assembly errors related to the direction of the door 3, and it is possible to eliminate the trouble of identifying the vertical direction of the door 3 and the inner plate 3b and confirming the direction after assembly. Simplification can be achieved.

The pair of detected portions 31 and 32 of the door 3 are formed as symmetrical portions that are point-symmetrical with respect to the center C of the door 3 . According to this, in relation to the door opening/closing detection device 11, it is possible to obtain the same detection action and detection accuracy in both the one detected portion 31 and the other detected portion 32. FIG.

The pair of detected parts 31 and 32 are symmetrically shaped parts and both project from the rear surface of the door 3 toward the front opening 2a, and the respective projection lengths L1 and L2 are set to the same dimension. According to this, the detection action range between the detected part 31 and the door open/close detection device 11 and the detection action range between the detected part 32 and the door open/close detection device 11 are the same, It is possible to improve the detection accuracy of the door opening/closing detection device 11 .

Since the inner plate 3b on the back surface of the door 3 has a flat surface 35 without a storage portion such as a door pocket, the overall thickness of the refrigerator 1 can be reduced. Further, in this case, it is difficult to distinguish the vertical direction of the door 3 and the inner plate 3b, but since it is possible to eliminate assembly errors as described above, the usability is improved.

Furthermore, in this case, by making the rear surface of the door 3 a flat surface 35, coupled with the natural convection in the storage room 6, the lower side portion 2Fa of the front frame portion 2F is prone to dew condensation. An aluminum tape 19 is attached to the lower side portion 2Fa as a heat transfer portion that is in contact with both the heat radiating pipe 15 disposed on the inner surface side and the inner surface of the lower side portion 2Fa. Therefore, the aluminum tape 19 can transfer the heat of the heat radiation pipe 15 and improve the anti-condensation performance. The aluminum tape 19 may be provided so as to be in contact with at least one of the heat radiation pipe 15 and the inner surface of the lower side portion 2Fa. Also, the heat transfer portion may be composed of a good thermal conductor other than the aluminum tape 19 .

<Other embodiments>
8 and 9 show second and third embodiments of the present invention. In the following, points that are substantially different from the above-described embodiment will be described.
The door 40 of the second embodiment shown in FIG. 8 differs from the door 3 of the first embodiment in the following points. That is, the door 40 has, for example, a square outer shape with the same height dimension H2 and width dimension W2 (H2=W2). Similarly, the main body of the refrigerator of the second embodiment also has a square outer shape matching the outer shape of the door 30 when viewed from the front. Detected portions 31 , 32 , 41 and 42 are arranged at the four corners of the door-side peripheral portion 30 of the inner plate 40 b of the door 40 .

In FIG. 8, the detected portion 41 at the upper left corner is disposed at a position symmetrical to the detected portion 31 at the upper right corner with a vertical straight line CL1 passing through the center C of the inner plate 40b as an axis of symmetry. The detection portions 41 and 31 are formed as symmetrical portions that are linearly symmetrical with each other. In FIG. 8, the detected portion 42 at the lower right corner is disposed at a position vertically symmetrical with the detected portion 31 at the upper right corner with a horizontal straight line CL2 passing through the center C of the inner plate 40b as an axis of symmetry. The detection portions 42 and 31 are formed as symmetrical portions that are linearly symmetrical with each other. The straight line CL1 is a vertical line parallel to the side surface of the door 40, and the straight line CL2 is a horizontal line perpendicular to the straight line CL1 at the center C.

In FIG. 8, the detected portion 41 at the upper left corner is arranged in a position that is vertically symmetrical with respect to the detected portion 32 at the lower left corner with respect to the horizontal straight line CL2. 41 and 32 are line-symmetrical to each other. In FIG. 8, the detected portion 42 at the lower right corner and the detected portion 32 at the lower left corner are arranged in positions symmetrical about the vertical straight line CL1 as an axis of symmetry. 32 are line-symmetrical with each other.

That is, as is clear from FIG. 8, the detected portions 31, 32, 41, and 42 have a symmetrical relationship in terms of their arrangement positions and outer shapes on the inner plate 40b. , 42 are formed with contact surfaces 41a and 42a similar to the detected portions 31 and 32, respectively. Also, although not shown, when the projection length of the detected portion 41 is L3 and the projection length of the detected portion 42 is L4, the projection lengths L3 and L4 of the detected portions 31 and 32 are equal to the projection length L1 of the detected portions 31 and 32, respectively. , L2 (L1=L2=L3=L4).

As a result, even if the contacted surfaces 31a, 32a, 41a, and 42a of the detected portions 31, 32, 41, and 42 are elongated as shown in FIG. , 180 degrees, and 270 degrees. It is configured to face the pin 11a.

As described above, in the door-side peripheral portion 30 of the door 40 of the second embodiment, at least the detected portion 31 and the detected portion 41 are arranged on the left and right sides with respect to the straight line CL1 or the straight line CL2 passing through the center C as an axis of symmetry. They are arranged symmetrically, or at least at positions where the detected portion 31 and the detected portion 42 are vertically symmetrical to each other. Alternatively, at least the detected portion 32 and the detected portion 41 are arranged vertically symmetrical to each other, or at least the detected portion 32 and the detected portion 42 are arranged to be left-right symmetrical to each other.

In this way, by providing the detected portions 41 and 42 which are vertically symmetrical or left-right symmetrical with respect to the detected portions 31 and 32, preferably the four detected portions 31 and 42 are provided as in the present embodiment. By providing 32, 41, 42, door opening/closing detection can be performed by detecting any of the detected parts 31, 32, 41, 42 regardless of the mounting direction of the door 40 or the inner plate 40b on the back surface thereof. It can be configured to face the device 11 . Therefore, it is possible to obtain the same effects as in the first embodiment, such as making it possible to eliminate assembly errors related to the direction of the door 40 or the inner plate 40b.

FIG. 9 is an enlarged plan view showing the vicinity of the detected portion 31 in the door 3′ of the third embodiment and the vicinity of the door opening/closing detection device 11 of the refrigerator main body 2. For convenience, the detected portion 31 and the door The open/close detection device 11 is drawn together. In addition, as indicated by the bold arrow in the figure, a door 3' for opening to the left is taken as an example.

That is, the door 3' has an upper hinge 10a (see FIGS. 4 and 1) attached to the upper surface mounting portion 10La and a lower hinge 10b (see FIG. 1) attached to the lower surface mounting portion 10Lb on the left front side of the refrigerator body 2. See) is rotatably supported by a hinge portion 10 consisting of. Thus, the door 3' of the third embodiment and the door 3 of the first embodiment are opened in opposite directions.

Further, as shown in FIG. 9, the detected portion 31 is formed with a contacted surface 50 such that the projection length L1' on the hinge portion 10 side is reduced. In other words, the abutted surface 50 has a projection length L1 on the side opposite to the hinge portion 10 that is longer than a projection length L1′ on the hinge portion 10 side (L1>L1′), and increases toward the hinge portion 10 side. It is slanted so that it becomes small gradually.

In this regard, in the arrangement configuration in which the door opening/closing detection device 11 is positioned on the side of the hinge portion 10 in the main body side peripheral portion 20 of the refrigerator main body 2, the detection target portion 31 is positioned against the push pin 11a by the principle of leverage. Although there is a possibility that the abutted surface 31a abuts from the side and an excessive stress is applied thereto, by forming an inclined surface like the abutted surface 50, application of excessive stress can be avoided. Specifically, if the abutted surface 31a is not inclined, the pushing pin 11a shown in FIG. 9 is pushed from the left side of the tip center C1 when the door 3 is closed. works. On the other hand, the abutted surface 50 is formed as an inclined surface that abuts from the center C1 side of the tip of the push pin 11a when the door 3 is closed, thereby preventing excessive stress from being applied to the push pin 11a. are doing.

As described above, the pair of detected portions 31 and 32 of the door 3' of the third embodiment have the contact surfaces 50 inclined with respect to the back surface of the door 3' at the projecting portions. The abutment surface 50 is an inclined surface such that the projection length of the detected portion 31 located on the hinge portion 10 side gradually decreases toward the hinge portion 10 side.
According to this, in the push-type door open/close detection device 11, excessive stress can be prevented from being applied to components such as the push-in pin 11a, and damage during opening and closing of the door 3' can be prevented.

The above-described embodiment is an example, and can be modified, expanded, or combined without departing from the gist of the invention. Also, part of the configuration can be changed as in the following modified examples, or combined with the above-described embodiment. can be done.

The refrigerator may have a plurality of doors, such as so-called double-door doors and drawer-type doors. You may arrange|position so that it may become symmetrical or left-right symmetrical.

The opening/closing detection means is not limited to the push-type door opening/closing detection device 11, and a self-capacitance type electrostatic sensor may be used. For example, the electrostatic sensor is provided on the door-side peripheral portion 30 on the rear surface of the door 3 as a pair of detection portions having detection electrodes and the like. In this case, for example, the opening and closing of the door 3 can be detected by the electrostatic sensor and the conductive material by providing the front end 2F of the refrigerator body 2 as the flange portion (detected portion) of the outer case 5 and providing the conductive material. A pair of conductive members may be provided in the door-side peripheral portion 30 and an electrostatic sensor may be provided in the main body-side peripheral portion 20 .
In this way, the opening/closing detection means includes the detected portion provided in one of the door-side peripheral portion 30 and the body-side peripheral portion 20 on the back surface of the door and the detection portion provided in the other peripheral portion. It is sufficient if it is configured to have

Each embodiment is provided by way of example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and its equivalents.

In the drawings, 2 is a refrigerator main body, 2a is a front opening, 2F is a front end portion, 2Fa is a lower side portion, 3, 3′ and 40 are doors, 10 is a hinge portion, and 11 is a door open/close detection device (open/close detection means, 15 is a heat radiating pipe, 19 is an aluminum tape (heat transfer part), 31, 32, 41, 42 are detected parts (open/close detection means, symmetrical shape part), 35 is a flat surface, 50 is an inclined surface, C indicates the center, and CL1 and CL2 indicate straight lines.

Claims (6)

refrigerator body,
a door that opens and closes the front opening of the refrigerator body, the door having a square shape that fits the front opening ;
and open/close detection means for detecting opening/closing of the door,
With the front end portion of the refrigerator main body or the inner peripheral portion of the front opening as the main body side peripheral portion,
The opening/closing detection means is provided in a detected portion provided in one peripheral portion and the other peripheral portion out of a door-side peripheral portion facing the main body-side peripheral portion and the main body-side peripheral portion on the back surface of the door. and a detection unit provided,
In the door-side peripheral portion, a straight line passing through the center of the door is defined as an axis of symmetry, with the center of the door being the point of symmetry, the four detection units or the four detection units being symmetrical with each other. The refrigerator is arranged in a vertically symmetrical and laterally symmetrical position. 2. The door according to claim 1 , wherein the four detected portions or the four detection portions of the door are formed as symmetrical portions that are line-symmetrical with respect to a straight line passing through the center of the door. refrigerator. 3. The refrigerator according to claim 2 , wherein the plurality of symmetrically shaped portions all project from the rear surface of the door toward the front opening, and the respective projection lengths are set to the same dimension. The door is rotatably supported with a hinge portion as a fulcrum,
each of the plurality of symmetrically shaped portions protrudes from the rear surface of the door toward the front opening, and has an inclined surface inclined with respect to the rear surface of the door at the projected portion;
3. The refrigerator according to claim 2 , wherein said slanted surface is formed such that the projection length of said symmetrically shaped portion located on said hinge portion side gradually decreases toward said hinge portion side. 5. The refrigerator according to any one of claims 1 to 4 , wherein the rear surface of the door has a flat surface without a storage portion such as a door pocket. A lower side portion of the front end portion of the refrigerator main body is provided with a heat transfer portion that is in contact with one or both of a heat radiation pipe disposed on the inner surface side and the inner surface of the lower side portion. Item 6. The refrigerator according to any one of Items 1 to 5 .

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