JP2009085531A - Freezer-refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a freezer-refrigerator capable of detecting the opening/closing state of drawer type doors juxtaposed in the vertical direction with a small number of detecting means smaller than the number of door bodies. <P>SOLUTION: A switch 16 for detecting the opening/closing state according to approaching states of the drawer type doors 14, 15 is mounted to one end face vertically opposing the drawer type doors 14, 15 juxtaposed in the vertical direction. When one door of the drawer type doors 14, 15 is opened, the opening of the drawer type doors 14, 15 can be detected by the switch 16. Further, when the drawer type doors 14, 15 are pulled out to the same position and the opening/closing state of the drawer type doors 14, 15 cannot be detected by only the detecting means, the opening/closing state of the drawer type doors 14, 15 can be detected by a rate of a change of a temperature sensor 17 in a storage 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door open / close detection mechanism that detects an open / closed state of a door on a front surface of a predetermined storage using a non-contact or contact type proximity switch, and a refrigerator / freezer including the door open / close detection mechanism.

  Conventionally, in order to prevent the cold air inside the refrigerator-freezer from leaking outside due to the opening of the door of the refrigerator-freezer, one door opening / closing detection means for detecting the opening / closing of each door of the refrigerator-freezer is provided for each door. I came.

  However, in a refrigerator / freezer having a plurality of doors, door opening / closing detection means for detecting the opening / closing of each door is required by the number of doors, so that there is a problem that the structure becomes complicated and the cost increases. .

  Therefore, what can detect the opening and closing of each door with a smaller number of door opening and closing detection means is desired. As an example, non-contact proximity that detects metal on one of the opposing end surfaces of two opposing door bodies A refrigerator-freezer provided with a switch is disclosed (for example, refer to Patent Document 1).

  Hereinafter, the door open / close detection means of the conventional refrigerator-freezer will be described with reference to the drawings.

  FIG. 4 is a perspective view of a conventional refrigerator-freezer described in Patent Document 1. As shown in FIG. As shown in FIG. 4, the refrigerator-freezer 1 is provided with two sets, that is, four sets of door bodies 3 that are open to the front and formed by opposed rotating doors, that is, four upper bodies, and upper door bodies 3 a and 3 b are relative to each other. The lower door bodies 3c and 3d are opposed to each other.

  When the upper doors 3a and 3b are closed, the opposed end surfaces 10 of the doors 3a and 3b are close to each other, and when the lower doors 3c and 3d are closed, the doors 3c and 3d are opposed to each other. The end face 10 is close.

  In the upper door bodies 3a and 3b, a single non-contact type proximity switch 9 for detecting metal is attached to the opposite end face 10 of one door body 3a, and in the lower door bodies 3c and 3d, A single non-contact type proximity switch 9 for detecting metal is attached to the opposite end face 10 of the door body 3c.

  About the conventional refrigerator-freezer comprised as mentioned above, the operation | movement is demonstrated below.

First, each switch 9 operates only when each door 3 is in a closed position if each door 3 is made of metal such as stainless steel, and when each door 3 is in an open position. It is not working. In this way, by providing a single switch 9 on only one of the opposing door bodies 3, the open / closed state of the door body 3 can be detected, so that the number of switches 9 is reduced compared to the number of door bodies 3. And cost reduction is possible.
JP 2000-199680 A

  However, the above-described conventional configuration has a problem that when the adjacent door is a pull-out door, the open / close state of the pull-out door cannot be detected when a plurality of doors are pulled out to the same pull-out position. Was.

  The present invention solves the above-described conventional problems, and even when the drawer doors provided in the vertical direction are opened to the same position and the detection means cannot detect the open state of the drawer doors, It aims at providing the refrigerator-freezer which can detect the opening-and-closing state of the said door body, without increasing a number.

  In order to solve the above-described conventional problems, the refrigerator-freezer of the present invention is a refrigerator-freezer provided with at least two opposing doors, and one of the doors is provided with detection means for detecting the open / closed state of the doors. The open / closed state of the door body is detected based on the detection result of the detecting means and the temperature change of any one of the storage boxes sealed by the door body.

  Thereby, even if the door body is pulled out to the same position, the open / closed state of the door body can be reliably detected.

  The refrigerator-freezer of the present invention detects the open / closed state of each door body even if the door body is pulled out to the same position without increasing the number of detection means for detecting the open / closed state of the pull-out doors provided side by side in the vertical direction. Thus, it is possible to provide notification to the user, so that it is possible to provide a refrigerator-freezer that is low in cost and has improved safety of stored food.

  The invention according to claim 1 includes at least two opposing door bodies, door opening / closing detecting means for detecting an open / closed state of the door bodies, and a temperature sensor for detecting a temperature of a storage box sealed by the door bodies. And detecting the opening / closing state of the door body based on the detection value of the door opening / closing detection means and the temperature sensor, so that the opening / closing state of the door body can be detected even when the opening / closing state cannot be detected only by the door opening / closing detection means. It can be detected reliably.

  According to a second aspect of the present invention, in the refrigerator-freezer according to the first aspect, the door opening / closing detection means is provided only in one of the opposing door bodies, and the temperature sensor is one of the opposing storages. As a result, it is possible to reliably detect the opening / closing of the door body at low cost without increasing the number of detection means.

  The invention described in claim 3 is the refrigerator-freezer according to claim 1 or 2, wherein the notification means for notifying the user of the open state of the door body is provided, so that the door is opened quickly. Can tell the user and can always keep the food fresh.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the same reference numerals are given to the same configurations as those of the conventional example or the above-described embodiments, and detailed description thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 and 2 are a longitudinal sectional view and a front view, respectively, showing the configuration of the refrigerator-freezer in Embodiment 1 of the present invention.

  In FIG. 1, the refrigerator 11 includes two storage boxes 12 and 13 (for example, a vegetable room and a freezing room) that store objects to be cooled side by side, and is opened and closed on the front surfaces of the storage boxes 12 and 13, respectively. Free pull-out doors 14 and 15 are similarly arranged side by side.

  Further, a switch 16 is provided as a door opening / closing detection means of the drawer type doors 14 and 15 on one of the end surfaces facing the top and bottom of the drawer type doors 14 and 15. A temperature sensor 17 that detects the temperature of the storage 13 is provided inside the storage 13.

  Furthermore, a notification means 18 is provided on the front surface of the refrigerator 11 to notify the user that the drawer type doors 14 and 15 are opened.

  Next, FIG. 3 is a block diagram showing an electrical configuration mainly including the control unit of the refrigerator-freezer according to Embodiment 1 of the present invention.

  The control part 19 consists of a microcomputer, for example, and functions as a control means for controlling the entire operation of the refrigerator-freezer including the notification means 18. The control unit 19 receives a switch ON / OFF signal input 20 of a switch 16 provided on one of the upper and lower end faces of the drawer doors 14 and 15 of the storage boxes 12 and 13 and a signal input 21 of the temperature sensor 17. In addition to this, temperature sensor signals provided in each room of the refrigerator-freezer are input.

  And the control part 19 calculates based on the calculation program memorize | stored beforehand using those inputs, and gives the door body opening alert | report alarm output 24 for operating the alerting | reporting means 18 to the drive circuit 23. ing. Further, the control unit 19 has a built-in temperature sensor signal comparison unit 22 for comparing whether the rate of change of the temperature sensor signal input 21 is larger or smaller than a preset value, and the switch ON / OFF signal input. Based on the calculation result of the temperature sensor signal comparison unit 22, a door body opening notification alarm output 24 for operating the notification unit 18 is output.

  About the refrigerator-freezer comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the user opens one of the pull-out doors 14 and 15, the switch ON / OFF signal input 20 of the switch 16 is input to the control unit 19, and the control unit 19 drives the drive circuit 23, A door opening notification alarm output 24 is output.

  Further, if the user pulls out the pull-out doors 14 and 15 to the same position, the switch 16 does not operate and the switch ON / OFF signal input 20 is not input to the control unit 19, the temperature sensor signal input 21 When the rate of change is compared in the temperature sensor signal comparison unit 22 of the control unit 19 and the rate of change of the value of the temperature sensor signal input 21 is larger than the set value, the pull-out doors 14 and 15 are pulled out to the same position. Therefore, the control unit 19 drives the drive circuit 23 to output a door opening notification alarm output 24.

  If the switch ON / OFF signal input 20 is not input to the control unit 19 and the rate of change of the temperature sensor signal input 21 is smaller than the set value, it is determined that both the pull-out doors 14 and 15 are closed. Thus, the door opening notification alarm output 24 is not output.

  As described above, in the present embodiment, the open / close state of the pull-out doors 14 and 15 is detected using the change rate of the switch ON / OFF signal input 20 of the switch 16 and the temperature sensor signal input 21. Even when the pull-out doors 14 and 15 are pulled out to the same position and the switch 16 does not operate and the switch ON / OFF signal input 20 is not input to the control unit 19, the pull-out doors 14 and 15 are reliably opened and closed. Can be detected.

  In the above embodiment, the storage boxes 12 and 13 have been described as a vegetable room and a freezer room, respectively. However, the present invention is not limited to this, and is used for other drawer doors formed side by side. May be.

  As described above, the refrigerator-freezer according to the present invention can detect the open / closed state of the door body even when the drawer-type doors provided in the vertical direction are opened to the same position, and the like, such as a heat insulation chamber and a thermostat. It can also be applied to equipment having a door configuration.

The longitudinal cross-sectional view which shows the refrigerator-freezer in Embodiment 1 of this invention. Front view of the refrigerator-freezer in the same embodiment The block diagram which showed the electrical structure of the refrigerator-freezer in the same embodiment A perspective view of a conventional refrigerator-freezer

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Refrigerator Refrigerator 13 Storage 14, 15 Pull-out door 16 Switch 17 Temperature sensor 18 Notification means

Claims (3)

  At least two opposing door bodies, door opening / closing detection means for detecting the open / closed state of the door bodies, and a temperature sensor for detecting the temperature of a storage box sealed by the door bodies, the door opening / closing detection means; An open / close state of the door body is detected based on a detection value of the temperature sensor.   2. The refrigerator-freezer according to claim 1, wherein the door opening / closing detection means is provided only in one of the opposing door bodies, and the temperature sensor is provided only in one of the opposing storages.   The refrigerator-freezer according to claim 1 or 2, further comprising an informing means for informing a user of an open state of the door body.