JP2008045834A - Showcase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a showcase capable of detecting drainage discharging work, preventing unwanted noise by stopping notification of full of drainage in a case of drainage discharging work, and further preventing misjudgment on full water. <P>SOLUTION: In this showcase comprising a drainage receiver, a water level detecting device for detecting the amount of drainage in the drainage receiver, and a notifying means for notifying that a water level reaches higher than a prescribed value, a detecting means is disposed for draining operation to discharge the stored drainage higher than the prescribed value, and the operation of a notifying means is stopped when the draining operation detecting means detects the draining operation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a freezer / refrigerator showcase, for example.

  For example, an open type vertical freezing and refrigeration showcase installed in a store such as a supermarket has a condenser 2 and a compressor (not shown) in a machine room 3 formed at the lower part of the showcase body as shown in FIG. ) And the like, and the product stored in the product storage 1 is cooled by the cool air cooled by the cooler installed on the back side of the showcase body, and the cool air is circulated. In the figure, 5 is a blower fan for a condenser, 6 is an evaporation plate, and 7 is a showcase controller control board.

  As described above, the cool air is circulated in the cabinet, but since the front surface of the product storage 1 is opened as a product entrance, warm outside air flows from here, and moisture contained therein is Condensation occurs in the cooler and forms frost

  And in order to prevent that the capacity | capacitance of a cooler falls by this frost formation, although it defrosts suitably, the defrosted water | moisture content generate | occur | produces as drain water.

  The drain water is usually connected to a drain pipe and led to a drain groove outside the store by this pipe. When the pipe is fixed, the installation position of the showcase is fixed by this pipe. Therefore, in a showcase in which a compressor is incorporated for easy movement, drain water is also stored in a drain water receiver 4 such as a drain tank or drain pan installed in the showcase so as not to impair mobility. .

  In this way, when drain water is stored in the drain water receiver 4, it is necessary to drain the water regularly. However, the amount of drain water generated depends on the weather, the size and temperature range of the showcase, It depends on the amount.

  For this reason, it is necessary to grasp the storage amount of drain water and drain it before overflowing, and an ultrasonic sensor or the like is provided as a water level sensor 9 above the drain water receiver 4 to detect the storage amount. Is notified by a full water warning lamp 8 provided on the upper front surface of the showcase. In the figure, reference numeral 10 denotes a controller display / setting board.

  As shown in FIG. 7, the controller display / setting board 10 includes a display unit 11 such as the internal temperature and an operation switch 12 for illumination. When the slide lid 14 is opened, the mode is switched to the inside, temperature setting, An operation switch 13 for switching is provided. Normally, the display unit 11 displays the internal temperature as shown in FIG. 7B, but when switched to the showcase function setting mode, a monitor symbol is displayed as shown in FIG. 7C. The

  There are various settings on the showcase controller control board 7 and the showcase controller display / setting board 10, but during normal operation, the two operation switches 13 for mode switching and temperature setting are simultaneously pressed for 3 seconds. Switch to showcase function setting mode.

  When the mode shifts to the showcase function setting mode, the monitor symbol display of the setting mode of the display unit 11 changes while scrolling by pressing the mode switching operation switch 13.

  When the water level sensor 9 is operated while detecting the amount of drain water in the drain water receiver 4 as described above, and the drain water level reaches a predetermined value of full water, the full water warning lamp 8 notifies the full water. .

  FIG. 11 is a control block diagram for full water notification. Distance information from the water level sensor 9 is input to the water level sensor input 9a connected to the input side of the control unit 7a of the showcase controller control board 7, and this input is received. The controller 7a outputs the full water warning lamp 8, and for example, an LED lamp is lit to notify the full water.

  When full water is notified, the operator opens the inspection lid (not shown) of the machine room 3 and takes out the drain water receiver 4 to carry out drainage work. During this time, the full water warning lamp 8 continues to be lit, and the full water warning lamp 8 is extinguished only after the drain water receiver 4 is returned to a predetermined position and is confirmed to be empty.

  The prior art is generally performed by those skilled in the art, and is not related to a known invention.

  When the full water notification is known by the notification means and the drainage work is performed based on the notification means, it is already known that the water is full during the drainage work, and the role of the full water notification is played.

  On the other hand, the full water notification means is not limited to the above-mentioned light lighting such as lamp lighting, but a sound such as a buzzer may be used so that it can be easily understood by the worker. May cause noise because it will continue to sound during drainage work. In order to eliminate such inconvenience, it is necessary for the operator to perform an operation such as manually stopping the full water warning lamp separately, which is troublesome.

  Also, in the case of a water level sensor that uses, for example, a float switch for drainage, if the float switch is pulled up to remove it from the drain water receiver, it may be erroneously determined that the water level has risen, resulting in a notification continuation determination. Also in the case of the water level sensor of the type, when the drain water receiver is pulled out for drainage and it moves upward, it is determined that the water surface has risen as described above, and the full water notification is continued.

  Thus, although the drainage operation has started, the operation of the notification means continues, and there is a risk of causing discomfort to the operator as well as the customers in the store where the showcase is installed.

  The object of the present invention is to eliminate the inconvenience of the conventional example, detect drain water drainage work, and in this case, stop the drain water full water notification to prevent unnecessary noise generation, etc. The object is to provide a showcase that can prevent judgment.

  In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a drain water receiver, a water level detection device for detecting the amount of drain water in the drain water receiver, and that the water level exceeds a predetermined value. In a showcase provided with a notifying means for notifying, provided is a draining action detecting means for draining drain water accumulated above a predetermined value, and when the draining action is detected by the draining action detecting means, the notifying means is operated. It is characterized by stopping.

  As described above, the showcase of the present invention detects that the drainage operation such as drawing out the drain water receiver is started in order to drain the drain water when the notification for urging drain water is performed. By stopping the full water notification of the drain water, it is possible to prevent unnecessary noise generation and to prevent misjudgment of full water.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a flowchart of a notification operation showing the first embodiment of the showcase of the present invention, FIG. 2 is a control block diagram of the notification as above, and the basic configuration of the showcase in which the present invention is implemented is as already described with reference to FIG. Therefore, although detailed description is omitted here, in the method of the present invention, the open / close detection switch 15 is attached to an inspection cover (not shown) covering the front surface of the machine room 3 in which the drain water receiver 4 is disposed. I was there.

  Then, the inspection cover open / close detection switch 15 is connected to the control unit 7a of the showcase controller control board 7, and a detection signal is input to the control unit 7a.

  On the other hand, the display unit 11 of the controller setting / display board 10 is set to the mode of the water surface distance measurement for measuring the distance between the water level sensor 9 shown in FIG. 6 and the water surface of the drain water in the drain water receiver 4, The monitor symbol of this mode is displayed and the distance to the water surface is displayed. In this case, a segment displaying a minus is used for a 100-digit numerical value.

  The drain water full notification operation will be described with reference to the flowchart of FIG. 1. The water level sensor 9 measures the water surface distance of the drain water (step 1), and as a result of the measurement, the water surface has reached within 10 mm from the edge of the drain water receiver 4. If not (step 2), it is determined that the water is not yet full, and the full water warning lamp 8 remains off (step 4).

  On the other hand, if the water surface has reached within 10 mm from the edge of the drain water receiver 4 (step 2), and the inspection cover open / close detection switch 15 is not turned on and the inspection cover is not open (step 3), It is determined that the drainage work with the cover open is not started, and the controller 7a of the showcase controller control board 7 outputs the full water alarm lamp 8 to light the full water alarm lamp 8 to notify the full water.

  On the other hand, if the inspection cover is open in the step (step 3), it is determined that the operation of opening the inspection cover is that drainage work is started after the drain water receiver 4 is taken out, and the full water warning lamp 8 is activated. Is stopped (step 4).

  Confirmation that the drainage operation has been started is not limited to the on / off operation of the open / close detection switch 15 by opening / closing the inspection cover as described above, but detecting the removal of the drain water receiver 4 from the machine room 3. It may be a switch.

  In the second embodiment, the drainage operation is detected by changing the level information of the drain water measured by the water level sensor 9, and the third embodiment functions to stop the notification when the drainage operation is detected. As shown in the graph of FIG. 4, when the drainage operation is performed, the drain water receiver 4 is pulled out from the machine room 3, so the distance from the water surface measured by the water level sensor 9 is Not stable. Therefore, this unstable state is detected as a drainage operation.

  In addition, depending on the worker, if a different matter occurs during the drainage operation, the drainage operation may be interrupted, and there is an operator who does not want to select the notification stop function in order to prevent such a situation from occurring. Furthermore, when draining work away from the showcase, there is a case where it is not desired to select the notification function in order to inform a third party that the showcase is being drained.

  As a response to such a demand, as shown in FIG. 5, an on / off setting mode of a water level sensor drain water and a drainage operation detection mode is provided in the setting mode.

  A description will be given of the operation of stopping the notification by detecting the water level instability in the drainage operation when the on / off setting mode of the water level sensor drain water and the drainage operation detection mode is provided.

  When the water surface distance measurement mode of drain water is set as shown in FIG. 6 (step 1), the water level sensor drain water and drainage operation detection mode shown in FIG. 5 is not selected by the operator and is off (step 2). ) When the water level of the drain water reaches the full water level within 10 mm from the edge of the drain water receiver 4 (step 6), it is output from the control unit 7a of the showcase controller control board 7 to the full water warning lamp 8. Turns on (step 7) to notify that the water is full.

  On the other hand, when the water level sensor drain water and drainage operation detection mode is selected and turned on by the operator (step 2), even if the measured water level is a normal rise within 10 mm from the previous time, (Step 3) When such a state has passed for 30 seconds or more (Step 5) and the water surface of the drain water has reached the full water level within 10 mm from the edge of the drain water receiver 4 (Step 6), the show The controller 7a of the case controller control board 7 outputs the full water warning lamp 8 to light up (step 7), and notifies that the water is full.

  Also, when the water level sensor drain water and drainage operation detection mode is selected and turned on by the operator (step 2), the measured water level is a rise of 10 mm or more from the previous time (step 3), FIG. 4, it is determined that the distance is not stable in the operation of drawing out the drain water receiver 4, and the full water warning lamp 8 is turned off as the drainage operation is started by this water level change (step 4).

  The water level measured in the step (step 3) is a case where the water level change from the previous time is an increase within 10 mm, and until this state has passed for 30 seconds (step 5), the full water warning lamp 8 Is unlit (step 4).

  In addition, at the stage of (Step 5), even if 30 seconds have passed when the water level change from the previous time is within 10 mm, the water level has not reached the full water level within 10 mm from the edge of the drain water receiver 4. (Step 6), the full water warning lamp 8 is not turned on (Step 4).

  8 and 9 show the fourth embodiment. In the first to third embodiments, if it is determined that the drainage operation has been started, the full water warning notification is basically stopped. In the fourth embodiment, the outside is informed that drainage is being performed.

  The operation of notifying the outside that the drainage operation is in progress will be described with reference to the flowchart of FIG. When the water surface distance measurement mode of the drain water is set (step 1), the water level sensor drain water shown in FIG. 5 and the drain operation detection mode are not selected by the operator and are turned off (step 2). Is not farther than 40 mm, that is, above the bottom of the drain water receiver 4 (step 6), and when the full water level within 10 mm from the edge of the drain water receiver 4 is reached (step 7), the showcase controller The controller 7a of the control board 7 outputs to the full water warning lamp 8 and lights it (step 8) to notify that the water is full.

  If the water level does not reach the full water level in the step (Step 7), the full water warning lamp 8 is turned off (Step 9).

  On the other hand, when the water level sensor drain water and drainage operation detection mode is selected and turned on by the operator (step 2), the measured water level is higher than the previous level by 10 mm or more (step 3). 9) It is determined that the distance is not stable in the operation of pulling out the drain water receiver 4 in the graph of FIG. 9, and the full water warning lamp 8 that has been lit is blinked on the assumption that the drainage operation is started by this water level change. Then, it notifies the outside that the drainage operation is in progress (step 4).

  By this notification during the drainage work, another worker can check the situation, and the occurrence of forgetting during the work can be prevented.

  In addition, even if the water level change from the previous time is within 10 mm in the stage of (Step 3) and is a normal water level change, until such a state passes for 30 seconds (Step 5), after the drainage work, A period until the water surface is stabilized after the operation of returning the drain water receiver 4 to a predetermined place is secured, and during this period, the full water warning lamp 8 continues to blink (step 4).

  In addition, when the normal water level change state within 10 mm from the previous time in (Step 5) is 30 seconds, if the water level of the drain water is more than 40 mm (Step 6), the water level is stable. Therefore, the full water warning lamp 8 continues to blink (step 4).

  Then, in (Step 5), the normal water level change state within 10 mm from the previous time is stable after 30 seconds, and the drain water surface is not far from 40 mm, and the drain water receiver 4 is If it is set at a predetermined place (step 6) and the water surface has not reached a full water state within 10 mm from the edge of the drain water receiver 4 (step 7), the full water warning lamp 8 is turned off (step 9).

  In addition, although the said embodiment demonstrated the case where it implemented to the vertical-type freezing / refrigeration open showcase, it is not limited to this, The flat-type freezing / refrigeration showcase which formed the upper surface in the opening, exclusive for freezing, It can also be implemented in a refrigerated showcase.

It is a flowchart of the drainage alerting | reporting operation | movement which shows 1st Embodiment of the showcase of this invention. It is a control block diagram which shows 1st Embodiment of the showcase of this invention. It is a flowchart of alerting | reporting operation | movement which shows 2nd, 3rd embodiment of the showcase of this invention. It is a graph of the relationship of the water level change and alarm lamp lighting which shows the showcase 2nd, 3rd embodiment of this invention. It is a setting mode figure which shows 3rd Embodiment of the showcase of this invention. It is a setting mode figure which shows 1st, 3rd embodiment of the showcase of this invention. It is a front view of a showcase controller display / setting board of a showcase. It is a flowchart of alerting | reporting operation | movement which shows 4th Embodiment of the showcase of this invention. It is a graph of the relationship between the water level change and alarm lamp lighting which shows 4th Embodiment of the showcase of this invention. It is a perspective view of a showcase. It is a conventional control block diagram.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Commodity storage 2 Condenser 3 Machine room 4 Drain water receptacle 5 Fan 6 Evaporating plate 7 Showcase controller control board 7a Control part 8 Water level warning lamp 9 Water level sensor 10 Showcase controller display / setting board 11 Display part 12 Operation switch 13 Operation switch 14 Slide lid 15 Inspection cover open / close detection switch

Claims (5)

In a showcase comprising a drain water receiver, a water level detection device that detects the amount of drain water in the drain water receiver, and a notification means that notifies that the water level has reached a predetermined value or more,
A showcase provided with a drainage operation detection means for draining drain water accumulated above a predetermined value, and when the drainage operation is detected by the drainage operation detection means, the operation of the notification means is stopped.   The showcase according to claim 1, wherein the drainage operation detection is performed by detecting movement of either a showcase inspection lid of a machine room or a drain water receptacle where the drain water receptacle is installed.   The showcase according to claim 1, wherein the drainage operation detection means is performed by a change in position information of a drain water level measured by the water level detection device.   The showcase according to claim 1, wherein the operation stop of the notification means can be selectively performed by a showcase user.   The showcase according to any one of claims 1 to 3, wherein when the drainage operation detecting means detects the drainage operation, the drainage operation is informed.

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