JP2017114589A - Dew condensation prevention system for elevator display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take automatic dew condensation prevention measures without needing to incorporate an additional resistance circuit when the possibility of dew condensation occurrence is high.SOLUTION: This dew condensation prevention system has, in a box, a substrate in which LED elements installed at an elevator landing and arranged in a dot matrix, and a circuit for controlling lighting of the LED elements, and is provided with: display devices 14 and 15 in which as lighting patterns for displaying characters and symbols at the LED elements, at least two types of display patterns, namely, a normal display pattern at the time of not needing dew condensation countermeasures and dew condensation prevention display pattern at the time of taking dew condensation countermeasures; and display control means for switching lighting patterns between the normal display pattern and the dew condensation prevention display pattern. In the dew condensation prevention display pattern, the ratio of lit LED elements among all the LED elements constituting the dot matrix is higher than that in the normal display pattern, and characters and graphics similar in meaning to those in the normal display pattern are displayed.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a dew condensation prevention system for an elevator display device.

  In buildings, when the temperature difference between the inside and outside of the building increases, the phenomenon of condensation on windows and walls occurs. Condensation is a phenomenon in which water vapor in the air condenses on the surface or inside of a substance in a solid state. For example, the dew point temperature at which moisture in the air at room temperature of 20 ° C. and humidity of 50% dew is 9.6 ° C., and dew condensation occurs where the surface of the wall or window falls to 9.6 ° C. or lower.

  Condensation is also a problem in elevators. In an elevator, a display device (indicator) is installed as a component of a hall operation panel, a car operation panel, or separately from the operation panel in order to guide passengers on the position of the car and the direction of movement of the car. However, dew condensation is a problem for display devices.

  In the elevator platform, the temperature difference between the building and the outside air tends to be large in the winter, especially in cold regions, or when the temperature and humidity changes due to sudden changes in weather are significant. Condensation will occur.

  When dew condensation occurs in the display device, the substrate housed in the box gets wet with water, resulting in a decrease in the insulation resistance of the electric circuit on the substrate. Depending on the situation, it may not be possible to satisfy the insulation resistance stipulated by laws and regulations, and the display device may not operate normally. Furthermore, an electrical accident may occur due to poor insulation.

For this reason, in the display apparatus installed in the elevator hall or the car, countermeasures for preventing condensation have been taken conventionally.
For example, Patent Document 1 discloses that a resistance dedicated to preventing condensation is provided inside the box, and the temperature difference is reduced by heat generation of the resistance to prevent condensation.

JP 54-71598 A

  However, when a heating resistor circuit dedicated to preventing condensation is added, there is a drawback that the layout of the display device on the operation panel is restricted due to the arrangement of the substrate inside the operation panel.

  Also, in the past, when it was time when condensation was likely to occur seasonally, based on empirical judgment, heat was generated by the heating resistor circuit to take measures to prevent condensation, but effective condensation measures were not taken. At some point, condensation could occur. In particular, there was a problem that it was not possible to cope with the occurrence of dew condensation due to unexpected unexpected drastic temperature drop.

  Therefore, the present invention has been made in view of the problems of the prior art, and by switching the display pattern of the display device to prevent dew condensation, it is not necessary to incorporate an additional resistance circuit, and dew condensation occurs. It is an object of the present invention to provide a dew condensation prevention system for an elevator display device that automatically takes a dew condensation prevention measure when there is a high possibility of this.

  In order to achieve the above object, a dew condensation prevention system for an elevator display device according to an embodiment of the present invention is a dew condensation prevention system that prevents the occurrence of dew condensation in a display device installed in an elevator, and is an elevator hall A lighting pattern in which the LED elements arranged in a dot matrix and a circuit for controlling the lighting of the LED elements are mounted in the box, and characters and symbols are displayed by the LED elements. A display device in which at least two types of display patterns are set: a normal display pattern when no countermeasure against condensation is required, and a dew condensation prevention display pattern when countermeasures against condensation are set, and the lighting pattern is the normal display pattern and the condensation prevention Display control means for switching between display patterns, and the dew condensation prevention display pattern is a dot matrix. Among all the LED elements to be configured, the ratio of the LED elements that are lit is higher than the normal display pattern and is a lighting pattern that displays characters and figures having the same meaning as the normal display pattern. To do.

It is a figure which shows the outline | summary of the dew condensation prevention system by 1st Embodiment of this invention. It is a front view of a hall operating panel. It is a longitudinal cross-sectional view of a hall operating panel. It is a figure which shows the normal display pattern of the display apparatus of a hall operating panel. It is a figure which shows the dew condensation prevention display pattern of the display apparatus of a hall operating panel. It is a flowchart which shows operation | movement of the dew condensation prevention system by 1st Embodiment of this invention. It is a figure which shows the other example of the dew condensation prevention display pattern of FIG. It is a front view which shows the modification of the hall operating panel of FIG. It is a front view which shows another modification of a hall operating panel. It is a figure which shows the outline | summary of the dew condensation prevention system by 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the dew condensation prevention system by 2nd Embodiment of this invention. It is a figure which shows the outline | summary of the dew condensation prevention system by 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the dew condensation prevention system by 3rd Embodiment of this invention.

Hereinafter, an embodiment of a dew condensation prevention system for an elevator display device according to the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 shows an overview of an elevator hall and a dew condensation prevention system to which a dew condensation prevention system for an elevator display device according to a first embodiment of the present invention is applied.
In FIG. 1, reference numerals 2a and 2b denote hold doors. Above the holders 2a, 2b is a curtain plate 4. The hall operation panel 10 is installed in the hall wall 5 so as to be embedded.
Next, FIG. 2 shows the front of the hall operating panel 10, and FIG. 3 shows a longitudinal section of the hall operating panel 10. The main body of the hall operating panel 10 includes an operating panel box 11 and a face plate 12 exposed on the surface side of the wall 4.

  As shown in FIG. 2, on the face plate 12, as a display device for displaying various information related to the operation state of the elevator, a direction light 14 for displaying the operation direction of the elevator, a position light 15 for displaying the car position, An indicator lamp 16 for displaying the operation status is provided.

  In addition, hall call registration buttons 17 a and 17 b are provided on the face plate 12. Since the hall call registration buttons 17a and 17b are also lit, the display device is a target for prevention of dew condensation in the dew condensation prevention system.

  In this embodiment, the direction lamp 14 and the position lamp 15 are a dot matrix type display device using LED elements that are two-dimensionally arranged in a matrix. As shown in FIG. 3, the LED substrate 20 on which the LED element 20 a constituting the direction lamp 14 and the position lamp 15 is mounted on the back surface of the face plate 12 and a circuit for controlling the lighting of the LED element 20 a is mounted. It is attached.

Similarly, the LED board 21 on which the LED element 20b and the lighting control circuit are mounted is attached to the back surface of the indicator lamp 16. In the case of this indicator light 16, when the car is full or when the car cannot be called due to emergency driving, the LED element 20b is turned on and the white letters on the display surface are displayed brightly. It has become so.
Also in the hall call registration buttons 17 a and 17 b, button substrates 22 a and 22 b on which LED elements and switches are mounted are attached to the back surface of the face plate 12.

  Next, in FIG. 1, reference numeral 30 indicates a dew condensation prevention system for preventing dew condensation from occurring in the operation panel 10. The dew condensation prevention system 30 includes an elevator control panel 31, a dew condensation prevention determination device 32, a temperature detector 33, and a humidity detector 34. The floor control panel 10 of each floor is connected to the control panel 31, and the display devices of the floor control panels 10 of all floors are also subject to condensation prevention.

  In the directional lamp 14 and the position lamp 15 which are dot matrix type display devices, the lighting pattern of the LED element matrix is shown in FIG. As shown in FIG. Here, FIG. 4 shows a display pattern of the directional lamp 14 and the position lamp 15 during normal operation, and FIG. 5 shows a display pattern of the directional lamp 14 and the position lamp 15 during the condensation prevention operation.

  In the directional lamp 14 and the position lamp 15, LED elements are arranged in a two-dimensional array to form an LED element matrix. In normal operation, the arrow indicating the direction of raising and lowering the car and the number indicating the floor on which the car is located are the LED elements represented by black squares in FIG. 20a '. The LED element 20a 'is lit. Hereinafter, such a display pattern is defined as a normal display pattern.

  On the other hand, during the anti-condensation operation, as shown in FIG. 5, the LED element 20a ′ indicated by the black squares in the background is lit, and the direction arrow and the floor number itself are not displayed. It is represented by a lighted LED element 20a. Hereinafter, such a display pattern is defined as a dew condensation prevention display pattern.

  In the case of the present embodiment, the dew condensation prevention display pattern is a display pattern in which the ratio occupied by the lit LED elements is higher than the normal display pattern among all the LED elements constituting the LED element matrix. Is a display pattern representing the same characters and symbols.

Switching from the normal display pattern to the anti-condensation display pattern is executed when the temperature difference between the environmental temperature around the building where the elevator is installed and the landing temperature (room temperature at the landing) exceeds a predetermined value. It has come to be.
Here, the environmental temperature around the building is the temperature around the building in a broad sense. However, the temperature fluctuates with time even during the day, and also varies greatly around the building depending on the location.

  Therefore, in the present embodiment, an average temperature recorded in the past by the Japan Meteorological Agency or a weather service company for an area where a building is located, for example, an administrative area or an area as a living area, is used as the environmental temperature of the building. This average temperature is not limited to one day, but may be a temperature obtained by averaging one week, 10 days, or every month. Decide according to the climatic characteristics of the region. The environmental temperature data based on the local average temperature is stored in the storage unit of the dew condensation prevention determination device 32 in FIG.

  The hall temperature is the air temperature around the hall operating panel 10 detected by the temperature detector 33 arranged at the hall. Since the hall temperature is measured to prevent condensation on the hall operation panel 10, it is preferable that the hall temperature is not installed at a position unrelated to the hall operation panel 10 but is arranged at a close position. .

  The temperature difference between the environmental temperature and the landing temperature is compared with the following reference temperature difference. In this embodiment, the reference temperature difference is set in correlation with the hall temperature and humidity at that time. If the hall temperature and humidity are both high, the amount of moisture contained in the air increases, and even if the temperature difference between the hall temperature and the ambient temperature is relatively small, condensation tends to occur. Is done. The opposite is true when the hall temperature and humidity are low.

  In general, the temperature and humidity of the hall do not fluctuate as much as 25 ° C and 40% in winter due to air conditioning in the building. Therefore, based on empirical or experimental data, the temperature difference is likely to cause condensation. For example, it is preset at 15 ° C.

Next, the operation of the dew condensation prevention system 30 of the elevator display device according to the present embodiment will be described with reference to the flowchart of FIG.
First, when the dew condensation prevention system 30 of the elevator display device starts up, the dew condensation prevention determination device 32 reads the environmental temperature at that time in the area where the building is located from the past environmental temperature data (step S10). Next, the current temperature and humidity data at the landing measured by the temperature detector 33 and the humidity detector 34 installed at the landing are sent to the dew condensation prevention determination device 32 (step S11).

  Thereafter, while the elevator is in operation, the difference ΔT between the measured hall temperature Th and the environmental temperature Te is compared with the set reference temperature difference Td (step S12), and the change in the temperature difference ΔT prevents condensation. Monitoring is continued by the determination device 32.

  If the difference ΔT between the landing temperature Th and the environmental temperature Te is relatively small, it is often unnecessary to take countermeasures for condensation. In this case, since the temperature difference ΔT between the hall temperature Th and the environmental temperature Te does not exceed the reference temperature difference Td (No in step S12), the direction lamp 14 and the position lamp 15 of the hall operating panel 10 are as shown in FIG. The display with the indicated normal display pattern is continued (step S13).

  On the other hand, the environmental temperature outside the building decreases as the autumn deepens and in the winter. Then, assuming that the reference temperature difference Td is set to 15 ° C., for example, when the temperature of the landing is 20 ° C., the temperature difference ΔT exceeds 15 ° C. if the environmental temperature is 5 ° C. or less ( Yes in step S12). In this case, a determination signal that the temperature difference ΔT has exceeded 15 ° C. is transmitted from the dew condensation prevention determination device 32 to the control panel 31 (step S14). As a result, the display control unit provided in the control panel 31 changes the display pattern from the normal display pattern displayed on the direction light 14 and the position light 15 of the hall operation panel 10 to the dew condensation prevention display pattern shown in FIG. Are switched (step S15). Thereafter, the directional lamp 14 and the position lamp 15 display a dew condensation prevention display pattern.

  In this embodiment, when the normal display pattern of FIG. 4 is switched to the dew condensation prevention display pattern shown in FIG. 5, the background is configured from a pattern that expresses symbols and characters by the LED elements 20 a ′ that are lit in the normal display pattern. The LED element 20a that is turned on and off is switched to a pattern that represents the same character and symbol. In the example of FIGS. 4 and 5, an example is shown in which characters and figures having the same shape are represented. However, the shapes may not necessarily be the same. It is sufficient to express the same meaning as a minimum.

  When the directional lamp 14 and the position lamp 15 are viewed as a whole, there are 154 total LED elements constituting the dot matrix. In the normal display pattern, the lit LED elements 20a 'have 13 directional lamps 14 and the position lamp 15 has some differences depending on the numbers, but in the case of the number 1, there are 10 pieces. The remaining 131 LED elements are not lit. In terms of ratio, the LED elements 20a 'that are lit are about 15% of the whole.

  On the other hand, in the case of the dew condensation prevention display pattern, the relationship between the lit LED element 20a ′ and the non-lighted LED element 20a is reversed from that in the normal display pattern, and the ratio of the lit LED element 20a ′. Is 85% of the total. As a whole, it can be seen that in the dew condensation prevention display pattern, the number of LED elements 20a 'to be lit is about 6 times.

  Although the LED element itself generates a slight amount of heat, the LED board 18 that drives the LED element incorporates many different circuit elements, and the amount of heat generated by the circuit elements on the LED board 18 is as follows. , And increases depending on the number of LED elements to be lit. Thus, when the normal display pattern is switched to the dew condensation prevention display pattern, the amount of heat generated by the LED substrate 18 is significantly increased. While the elevator is in operation, the dew condensation prevention display pattern continues in the direction lamp 14 and the position lamp 15. Since the directional lamp 14 and the position lamp 15 are always lit during operation, the temperature inside the operation panel 10, specifically, the back surface of the face plate 12 or the operation panel box 11 is generated by the heat generated by the substrate. The temperature of the inner surface will increase. Moreover, the air inside the operation panel 10 is also warmed, and the amount of water that can be contained is increased. As a result, it is possible to effectively prevent the surface temperature from dropping below the dew point and causing condensation as compared to the temperature at the landing. Therefore, it is possible to prevent the insulation resistance of the electric circuits on the LED plates 18 and 20 and the button substrates 22a and 22b from being reduced due to condensation, and maintain the function.

  Moreover, instead of providing a separate dedicated resistor for heat generation in the circuit as in the prior art, the amount of heat generation is increased by switching the display pattern using the original circuit on the substrate as the heat source. Condensation prevention measures can be implemented without the need to change the circuit.

  Furthermore, according to the present embodiment, when it becomes a time when condensation is likely to occur seasonally, it is automatically determined that the countermeasure against condensation is necessary based on the difference between the environmental temperature and the landing temperature. Condensation prevention measures are implemented without fail.

(Modification 1)
Next, FIG. 7 shows Modification 1 of the display device for the hall operating panel to which the present invention is applied.

  The embodiment described above is an embodiment in which the display pattern is switched to the dew condensation prevention display pattern while the elevator is in operation, that is, while providing services to passengers.

  Among elevators, there are elevators in which the operation state of the elevator is in a standby state at a time zone such as midnight or early morning when the use of passengers is extremely reduced.

  During the day, the time zone from midnight to dawn is the time zone during which the temperature drops most. Moreover, it can be said that the time from midnight to dawn is the time when the temperature is the lowest and condensation is likely to occur.

  Therefore, in this modified example 1, during the operation of the elevator, after the display pattern switching of the first embodiment described above is performed and the elevator enters a standby state, the direction lamp 14 and the position lamp 15 are shown in FIG. As described above, the display is switched to the dew condensation prevention display pattern for lighting all the LED elements 20a 'constituting the LED element matrix.

  In the dew condensation prevention display pattern according to the first modified example, the amount of heat generated on the LED substrate 18 is further increased, and therefore, it is possible to prevent dew condensation from occurring in the dawn of cooling. During the time period when the elevator is in a standby state, the display pattern does not bother the user.

(Modification 2)
Next, FIG. 8 shows a modification 2 of the hall operating panel to which the present invention is applied.
The hall operation panel 40 is different from the hall operation panel 10 shown in FIG. 2 in that it includes a dedicated indicator lamp 41 that displays that the dew condensation prevention operation is being performed.
The dedicated indicator lamp 41 includes an LED as a light source. When the indication of the directional lamp 14 and the position lamp 15 is switched to the dew condensation prevention display pattern, the LED of the light source is turned on, and a character string “during route prevention operation” is displayed. It comes to float brightly.

  According to the second modified example, when the directional lamp 14 and the position lamp 15 are displayed in the dew condensation prevention display pattern, the dedicated indicator lamp 41 is also lit, so that the substrate of the dedicated indicator lamp 41 is heated. Thus, the temperature inside the operation panel 40 can be kept high.

(Modification 3)
Next, FIG. 9 shows a modification 3 of the hall operating panel to which the present invention is applied.
In the present embodiment described so far, when the temperature and humidity of the hall are detected and the set conditions are satisfied, the mode automatically shifts to the dew condensation prevention display mode.
On the other hand, the hall operating panel 50 shown in FIG. 9 includes a changeover switch 52 for manually switching to the dew condensation prevention display mode. In this case, by inserting a key into the changeover switch 52 and turning it, the switch is switched to the dew condensation prevention display mode when the switch is turned on. When the changeover switch 52 is turned OFF, as described in the flowchart of FIG. 6, when the set condition is satisfied, the mode automatically shifts to the dew condensation prevention display mode.

  According to the third modified example, the anti-condensation measure is changed flexibly when a sudden temperature drop is expected due to abnormal weather such as the arrival of an early cold wave, which is different from the normal year. Can be done.

(Second Embodiment)
Next, a dew condensation prevention system for an elevator display device according to a second embodiment of the present invention will be described with reference to FIGS.

  In the first embodiment described above, when the difference between the environmental temperature outside the building and the measured hall temperature is larger than the reference temperature difference, the direction lamp 14 and the position lamp 15 on the hall operating panel 10 are displayed in a dew condensation prevention display. This is an embodiment in which switching is made.

On the other hand, in the second embodiment, barometric pressure data is acquired from the meteorological data providing system of the Japan Meteorological Agency via the Internet, and the directional lamp 14 and the position lamp 15 of the hall operating panel 10 are displayed on the basis of the barometric pressure data. This is an embodiment for switching to a mode, and is preferably combined with the display mode switching of the first embodiment.
As shown in FIG. 10, the dew condensation prevention determination device 32 is connected to a meteorological agency weather data providing system 64 on the Internet 62 via a receiving terminal.

Next, the operation of the dew condensation prevention system according to the present embodiment will be described with reference to the flowchart of FIG.
First, when the dew condensation prevention system 30 of the elevator display device starts up, the dew condensation prevention determination device 32 acquires the atmospheric pressure data of the day from the meteorological data providing system 64 of the Japan Meteorological Agency through the Internet 62 (step S20).

  Thereafter, while the elevator is in operation, the average pressure of the past simultaneous period stored in the storage device is taken in (step S21), the average pressure and the current pressure are compared, and the dew condensation prevention determination device 32 Monitoring is continued (step S22).

  If the difference from the average atmospheric pressure is relatively small, it is judged that there is no abnormal weather that closely affects the occurrence of condensation such as the abnormally developed low pressure or the approach of the cold front (No in step S22). In the direction light 14 and the position light 15 on the hall operating panel 10, the display according to the normal display pattern shown in FIG. 4 is continued (step S23).

    On the other hand, when the difference from the average atmospheric pressure is large and exceeds the set reference atmospheric pressure difference (yes in step S22). In this case, a determination signal is transmitted from the dew condensation prevention determination device 32 to the control panel 31 (step S24). As a result, the display control unit included in the control panel 31 switches the normal display pattern displayed on the direction light 14 and the position light 15 of the hall operation panel 10 to the dew condensation prevention display pattern shown in FIG. S25). Thereafter, the directional lamp 14 and the position lamp 15 display a dew condensation prevention display pattern.

  In the case of abnormally developed low pressure or a situation where a cold front passes, the temperature often decreases rapidly. In that case, as in the first embodiment, if the basis for switching the display pattern depends only on the average temperature, there is a possibility that the opportunity to take dew condensation prevention measures may be lost.

  On the other hand, as in the second embodiment, by adding a large change in the atmospheric pressure to the determination material, it becomes possible to grasp a sign of a decrease in temperature and promptly shift to the dew condensation prevention display. It is possible to prevent the occurrence of condensation.

(Third embodiment)
Next, a dew condensation prevention system according to a third embodiment of the present invention will be described with reference to FIGS.

The first embodiment and the second embodiment described so far are embodiments in which the dew condensation prevention system according to the present invention is applied to a hall operation panel installed at a hall.
On the other hand, the third embodiment is an embodiment in which the dew condensation prevention system according to the present invention is applied to a hall operating panel installed in a car.

  In FIG. 12, a car operation panel 72 is installed in a car 70, in which passengers register destination floors and operate to open and close the car door 71. As shown in FIG. 12, the face plate 73 of the car operation panel 72 displays, as display devices, a directional lamp 74 that displays an elevator operation direction, a position lamp 75 that displays a car position, and an elevator operation status. An indicator lamp 76 is provided. In addition, the face plate 12 is provided with a destination registration button 77 and car door opening / closing buttons 78a and 78b.

In the car operation panel 72, as in the hall operation panel 10 shown in FIG. 2, the direction lamp 74 and the position lamp 75 are dot matrix type display devices using LED elements arranged in a matrix. On the back surface of the face plate 12, although not shown, a circuit for controlling lighting of the LED element and an LED substrate on which the LED element is mounted are attached. Such a car operation panel 72 is connected to the control panel 31 and the dew condensation prevention determination device 32 via a tail cord.
In addition, the car 70 is provided with a temperature sensor 79 for detecting the air temperature in the car room and a humidity sensor 80 for detecting the humidity.

  Next, the operation of the dew condensation prevention system of the elevator display device according to the present embodiment will be described with reference to the flowchart of FIG. Also in the third embodiment, display patterns are switched in the same manner as in the flowchart of FIG. 6 of the first embodiment.

  First, when the dew condensation prevention system 30 starts up, the dew condensation prevention determination device 32 reads the environmental temperature data at that time in the area where the building is located (step S30). Next, the current temperature and humidity data measured by the temperature sensor 79 and the humidity sensor 80 are sent to the dew condensation prevention determination device 32 (step S31).

  Thereafter, while the elevator is in operation, the difference ΔT between the measured temperature Tc in the car and the ambient temperature Te and the set reference temperature difference Td are compared, and a dew condensation prevention determination is made regarding the change in the temperature difference ΔT. Monitoring is continued by the device 32 (step S32).

  If the difference between the environmental temperature Te and the car room temperature Tc is relatively small, it is often unnecessary to take countermeasures for condensation. In this case, since the temperature difference ΔT between the car room temperature Tc and the environmental temperature Te does not exceed the reference temperature difference Td (no in step S32), the direction light 74 and the position light 75 of the car operation panel 72 are as shown in FIG. The display with the normal display pattern as shown in FIG. 5 is continued (step S33).

  On the other hand, assuming that the reference temperature difference Td is set to 15 ° C., for example, when the temperature in the car room is 20 ° C., the temperature difference ΔT exceeds 15 ° C. if the environmental temperature is 5 ° C. or less. (Yes in step S32). In this case, a determination signal is transmitted from the dew condensation prevention determination device 32 to the control panel 31 (step S34). As a result, the display control unit provided in the control panel 31 changes from the normal display pattern previously displayed on the direction light 74 and the position light 75 of the car operation panel 70 to the dew condensation prevention display pattern as shown in FIG. The display pattern is switched (step S35). Thereafter, the directional lamp 74 and the position lamp 75 display a dew condensation prevention display pattern.

  According to the third embodiment as described above, similarly to the first embodiment, when the normal display pattern is switched to the dew condensation prevention display pattern, the amount of heat generated by the LED substrates of the directional lamp 74 and the position lamp 75 is significantly increased. . Due to the heat generated by the LED element substrate, the temperature inside the car operation panel 70, specifically, the temperature of the back surface of the face plate 12 and the inner surface of the case 11 increases, and the surface temperature decreases below the dew point to cause dew condensation. Generation | occurrence | production can be prevented effectively.

  In the third embodiment, as in the first modification of the first embodiment, when the elevator is in a standby state, the direction light 74 and the position light 75 are as shown in FIG. You may make it switch to the dew condensation prevention display pattern which makes all the LED element 20a 'which comprises the LED element matrix light.

  Further, as shown in FIGS. 8 and 9, the car operation panel 70 is provided with a dedicated indicator lamp 41 for displaying that the dew condensation prevention operation is being executed, and a changeover switch 52 for manually switching to the dew condensation prevention display mode. You may do it.

  Also in the third embodiment, as in the second embodiment, barometric pressure data is obtained from the meteorological agency's meteorological data providing system 64 via the Internet 62, and the direction light of the car operation panel 72 is based on the barometric pressure data. 74 and the position lamp 75 may be switched to the dew condensation prevention display mode.

  As described above, the dew condensation prevention system for an elevator display device according to the present invention has been described with reference to a preferred embodiment, taking as an example the case where the display device is incorporated in an operation panel installed in a landing or a car. The present invention can also be applied to a display device provided in a hall or a car independently of an operation panel. Also, these embodiments are given as examples and are not intended to limit the scope of the invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made without departing from the spirit of the present invention. is there. The claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

2a, 2b ... hold door, 4 ... curtain plate, 5 ... wall, 10 ... landing operation panel, 11 ... operation panel box, 12 ... face plate, 14 ... direction light, 15 ... position light, 18 ... LED substrate, 20a ... LED element, 21 ... LED substrate, 30 ... dew condensation prevention system, 31 ... control panel, 32 ... dew condensation prevention determination device, 41 ... dedicated indicator lamp, 52 ... switch, 62 ... internet, 64 ... weather data providing system

In order to achieve the above object, a dew condensation prevention system for an elevator display device according to an embodiment of the present invention is a dew condensation prevention system that prevents the occurrence of dew condensation in a display device installed in an elevator, and is an elevator hall is installed in the dot matrix display with LED elements arranged in a dot matrix, and a circuit for controlling lighting of the LED elements, have in the box a board mounted is a character, a symbol by the LED element As a unit lighting pattern, a display device in which at least two kinds of display patterns are set, that is, a normal display pattern when condensation countermeasures are not required and a condensation prevention display pattern when condensation countermeasures are set, and the lighting pattern is the normal display pattern Display control means for switching between the dew condensation prevention display pattern and the dew condensation prevention display pattern, and the dew condensation prevention display pattern Is a lighting pattern that displays characters and figures having the same meaning as the normal display pattern in which the ratio of the LED elements that are lit is higher than the normal display pattern among all the LED elements constituting the dot matrix. It is characterized by being.

Claims (8)

A dew condensation prevention system that prevents dew condensation from occurring in a display device installed in an elevator,
A box having a board on which LED elements arranged in a dot matrix and a circuit for controlling lighting of the LED elements are mounted is installed in an elevator hall, and characters and symbols are displayed by the LED elements. As a lighting pattern, a display device in which at least two types of display patterns are set: a normal display pattern when no countermeasures against condensation are required, and a dew condensation prevention display pattern when countermeasures against condensation are set,
Display control means for switching the lighting pattern between the normal display pattern and the dew condensation prevention display pattern,
In the dew condensation prevention display pattern, among all the LED elements constituting the dot matrix, the ratio of the LED elements that are lit is higher than the normal display pattern, and characters and figures having the same meaning as the normal display pattern are used. A dew condensation prevention system for an elevator display device, characterized in that the lighting pattern is displayed. A temperature detector that detects the room temperature at the landing;
Stores environmental temperature data recorded in the past for the area around the building where the elevator is installed, compares the room temperature at the current landing with the environmental temperature at the same time, and sets the temperature difference in advance A dew condensation prevention judging means for judging the situation exceeding the temperature difference,
2. The dew condensation prevention system for an elevator display device according to claim 1, wherein the display control unit switches the lighting pattern from a normal display pattern to the dew condensation prevention display pattern based on the determination result.   The dew condensation prevention judging means stores the atmospheric pressure data recorded in the processing for the area, acquires the atmospheric pressure data of the area from the meteorological data providing system of the Japan Meteorological Agency, and the current atmospheric pressure and the average atmospheric pressure of the past simultaneous period. And determining a situation in which the atmospheric pressure difference is likely to exceed a preset reference atmospheric pressure difference, and switching from the normal display pattern to the dew condensation prevention display pattern based on the determination result. Item 3. A dew condensation prevention system for an elevator display device according to item 1 or 2.   The dew condensation prevention display pattern according to any one of claims 1 to 3, wherein the dew condensation prevention display pattern is a lighting pattern in which lighting and non-lighting of LED elements are reversed from a normal display pattern. system.   4. The elevator display device according to claim 1, wherein the dew condensation prevention display pattern is a lighting pattern in which all LED elements in a dot matrix are lit when the elevator is in a standby state. Anti-condensation system.   The dew prevention system for an elevator display device according to claim 1, further comprising a changeover switch for manually switching a lighting pattern from the normal display pattern to the dew condensation prevention display pattern.   The dew prevention system for an elevator display device according to claim 1, further comprising: a dedicated operation lamp for displaying that the display is switched to the dew condensation prevention display pattern. A dew condensation prevention system that prevents dew condensation from occurring in a display device installed in an elevator,
A box having an LED element installed in an elevator car and arranged in a dot matrix and a circuit for controlling lighting of the LED element is mounted in the box, and letters and symbols are the LED elements. As a lighting pattern to be displayed, a display device in which at least two kinds of display patterns are set, a normal display pattern when no countermeasure against condensation is required and a dew condensation prevention display pattern when countermeasures against condensation are set,
Display control means for switching the lighting pattern between the normal display pattern and the dew condensation prevention display pattern,
In the dew condensation prevention display pattern, among all the LED elements constituting the dot matrix, the ratio of the LED elements that are lit is higher than the normal display pattern, and characters and figures having the same meaning as the normal display pattern are used. A dew condensation prevention system for an elevator display device, characterized in that the lighting pattern is displayed.