JP3631487B1 - Energizing glass device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energization heat generating glass device capable of effectively preventing cold draft and / or condensation.
An energizing heat generating glass provided with a heat generating means, and a temperature difference attached to the energizing heat generating glass to detect a difference between a temperature on a warm air side of the energized heat generating glass and an ambient temperature on the warm air side close to the warm air side surface. And a control means for controlling the heat generating means based on a detection signal from the temperature difference detecting means to prevent cold draft and / or condensation.
[Selection] Figure 1

Description

  The present invention relates to a current-generating heat generating glass device, and more particularly to a device devised so that cold draft and / or condensation can be effectively prevented.

  The so-called energized heat generating glass is used in a wide range of fields in order to prevent “cold draft” caused by a difference in temperature and “condensation” caused by a difference in temperature and humidity and humidity. Here, let us summarize the cold draft and condensation.

  First, the cold draft means the following phenomenon. For example, in a room heated by a stove, when the stove is installed at a location far from the window, convection is generated in which the warmed air rises to the ceiling and returns to the stove direction. In this case, when the warmed air passes by the window, the temperature rapidly decreases due to the cold air of the window. The cooled air passes over the floor and returns to the stove direction. In this case, the temperature difference between the ceiling and the floor becomes large. Generally, when the difference becomes 5 ° C. or more, an unpleasant situation occurs. Such a phenomenon is called a cold draft.

  Condensation, on the other hand, may occur when, for example, the inside of a window glass becomes cloudy with water droplets in winter or when the surface of a glass with cold water touches the surface of a glass that has a lower temperature than the surrounding air. This means a phenomenon in which the temperature of the water drops and water vapor condenses to form water droplets on the surface. Moreover, when it is a shape which has an edge part like a window glass, although it changes with various conditions, generation | occurrence | production from the lower part or corner part which is normally easy to radiate heat is seen.

  Moreover, there exist patent document 1 and patent document 2 as what discloses the structure of the said electricity-heating glass.

Japanese Patent Laid-Open No. 11-25340 JP-A-11-345677

  The following configuration is disclosed in claim 8 of the specification in “Paper Condensation Prevention Device for Window Glass Surface of Vending Machine” in Patent Document 1. That is, an indoor temperature sensor and an outdoor temperature sensor are provided, and the temperature detected from each temperature sensor is compared, and when the temperature difference is equal to or greater than a certain value, the dew condensation condition is assumed and the heating glass is controlled to be heated.

  Next, the “heat generation system using a heat-generating plate” in Patent Document 2 discloses the following configuration in the second embodiment disclosed in (0008) of the specification. That is, a detection unit for detecting the surface temperature of the heat generating glass and a detection unit for detecting the wall surface temperature in the room are provided, and based on each detection temperature, the surface temperature of the heat generation glass is the same or substantially the same as the temperature of the wall surface It controls to prevent cold draft.

The conventional configuration has the following problems.
First, in the case of “a dew condensation prevention device for a window glass surface of a vending machine” disclosed in Patent Document 1 and “a heat generation system using a heat-generating plate” disclosed in Patent Document 2, both are temperature Since two sensors are required, there is a problem that the cost increases due to an increase in the number of parts and an increase in man-hours as well as a complicated configuration.
In addition, the “condensation prevention device for the window glass surface of the vending machine” described in claim 8 of Patent Document 1 compares the difference between the indoor temperature and the outdoor temperature, and when the temperature difference is a certain value or more, Because it is a configuration that controls heating, if the thickness or number of glasses that make up the window glass is changed, the thermal conductivity from the room also changes, and effective heating control against condensation that occurs in the window glass is possible. There are cases where it is not possible.
Further, the “heat generation system using a heat-generating plate” disclosed in Patent Document 2 prevents the cold draft by making the temperature of the glass surface the same as or substantially the same as the temperature of the nearby wall surface.
However, in a sudden temperature change in the room immediately after the heating device is started or stopped, the reaction time is delayed when the wall surface material has a low thermal conductivity.
Furthermore, in a normal case, dew condensation begins to occur from the lower part or corner of the glass surface, so it is necessary to consider the detection location in the condition detection.

  The present invention has been made based on such points, and an object of the present invention is to provide an energized heat generating glass device capable of effectively preventing cold draft and / or condensation.

In order to achieve the above object, an energizing heat generating glass device according to claim 1 of the present invention comprises an energizing heat generating glass provided with heat generating means, a temperature of the warm air side surface of the energized heat generating glass attached to the warm air side surface of the energized heat generating glass, and the A Peltier element that detects the difference between the ambient temperature on the warm air side adjacent to the warm air side surface, and the heating means based on a detection signal from the Peltier element to prevent cold draft and / or condensation, and is set in advance. And a control means for controlling the output of the heat generating means in a plurality of stages based on a temperature difference in a plurality of stages and turning off the heat generating means when the temperature falls below a preset minimum temperature difference. It is a feature.

As described above in detail, according to the energizing heat generating glass device according to the present invention, the energizing heat generating glass provided with the heat generating means, the temperature of the warm air side surface of the energized heat generating glass attached to the energized heat generating glass, and the warm air adjacent to the warm air side surface. Temperature difference detecting means for detecting a difference from the ambient temperature on the side, and control means for preventing the cold draft and / or condensation by controlling the heat generating means based on a detection signal from the temperature difference detecting means. Because it is configured to detect the difference between the temperature of the warm air side of the energized heat generating glass and the ambient temperature of the warm air side adjacent to it, the heat generating means is controlled based on that difference, so cold draft and condensation It is possible to respond effectively and quickly.
In addition, heating by the heat generating means can be suppressed to a necessary minimum, and thereby energy consumption can be reduced.
In addition, when the temperature detecting means is constructed from a Peltier element attached to the warm air side surface of the energized heat generating glass, a single detecting means will suffice, simplifying the configuration, reducing the number of parts, and reducing man-hours. Cost can be reduced.
Further, when a heat transfer material is provided on the surface of the temperature difference detecting means, it is possible to more effectively cope with cold drafts and condensation.
Moreover, a higher effect can be obtained by making the heat transfer material into a fin shape.
Further, by attaching the temperature difference detection means to the lower corner of the energized heat generating glass surface, it is possible to improve the appearance and to detect the temperature difference at the initial dew condensation occurrence place, so that dew condensation can be reliably prevented.
A higher effect can also be expected when the output of the heat generating means is controlled in a plurality of stages based on a plurality of stages of temperature differences preset by the control means.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing an overall configuration of an energization heat generating glass device according to the present embodiment. First, there is an energization heat generation glass 1. The energizing heat generating glass 1 includes a cold air side glass plate 3, a warm air side glass plate 5, a frame body 7 that holds the cold air side glass plate 3 and the warm air side glass plate 5 at predetermined intervals, and the cold air side glass. The heater 9 is provided between the plate 3 and the warm air side glass plate 5 and is provided on the warm air side glass plate 5 side.

  The energizing heat generating glass 1 having the above configuration is fitted in the window frame 11. Further, in FIG. 1, the left side of the energization heat generating glass 1 is the cold air side, and the right side is the warm air side. Then, by appropriately heating the warm-side glass plate 5 with the heater 9, the temperature difference between the surface temperature of the warm-side glass plate 5 and the ambient temperature on the warm-air side adjacent thereto is corrected, and cold draft and / or condensation Is to prevent.

  A Peltier element 13 as a temperature difference detecting means is attached to the warm air side of the warm air side glass plate 5 of the energization heat generating glass 1 via a heat conductive double-sided tape 14. The Peltier element 13 detects, for example, a temperature difference between the surface temperature of the warm air side glass plate 5 and the ambient temperature on the warm air side and immediately adjacent to the warm air side glass plate 5 based on the principle shown in FIG. It is.

  Referring to FIG. 3, a P-type thermoelectric semiconductor 15 and an N-type thermoelectric semiconductor 17 are joined via copper electrodes 19, 21, and 23. In this case, when a direct current is supplied from the power source 25, a temperature difference is generated between the upper side and the lower side in FIG. 3 with the P-type thermoelectric semiconductor 15 and the N-type thermoelectric semiconductor 17 interposed therebetween based on the so-called “Peltier effect”. To do. On the contrary, when a temperature difference is generated between the upper side and the lower side in FIG. 3 with the P-type thermoelectric semiconductor 15 and the N-type thermoelectric semiconductor 17 interposed therebetween, an electromotive force is generated thereby. The Peltier device 13 according to the present embodiment utilizes such a principle, and is generated due to a temperature difference between the surface temperature of the warm air side glass plate 5 and the ambient temperature on the warm air side and in the immediate vicinity of the warm air side glass plate 5. The detected electromotive force is detected, thereby detecting the magnitude of the temperature difference.

  A detection signal from the Peltier element 13 is input to the control means 27. The control means 27 controls the heater 9 based on the detection signal to correct the temperature difference between the warm air side surface temperature of the warm air side glass plate 5 and the ambient temperature on the warm air side and in the immediate vicinity of the warm air side glass plate 5. To prevent cold drafts and / or condensation.

  The mounting structure of the Peltier element 13 will be described with reference to FIG. The Peltier element 13 is on the warm air side of the warm air side glass plate 5 and is attached to the lower right corner. The portion is a portion that is not conspicuous on the surface of the warm air glass plate 5 and is a portion where the temperature is expected to be low. This is because the heat heated by the heater 9 is the most easily radiated to the outside. By attaching the Peltier element 13 to such a place, cold draft and / or condensation are prevented at an early stage.

The lead wires 29 and 31 drawn from the Peltier element 13 pass through the through hole 33 provided in the warm air side glass plate 5, pass through the air layer of the energizing heat generating glass 1, penetrate the frame body 7, and the energizing heat generating glass 1. Pull out from the side. Furthermore, since it is connected to the control means 27 through the window frame 11 and the inside of the wall, the lead wires 29 and 31 are not exposed on the appearance, and the appearance can be improved.
It is also conceivable that the outer peripheral portion of the Peltier element 13 is covered with a cover 34 as indicated by a virtual line in FIG. In that case, the through-hole 33 etc. can be hidden and aesthetics can be improved.

Next, the contents of control by the control means 27 will be described with reference to the flowchart of FIG.
First, a cycle (%) and a detection voltage in so-called “cycle control” are set.
Incidentally, regarding condensation, not only the temperature difference but also the humidity are related. Therefore, when only dew condensation is considered, it is taken into consideration when setting the detection voltage.
Next, automatic start is performed. First, in step S1, it is determined whether or not the electromotive force detected by the Peltier element 13 is 3.5 mV or more. If it is determined that the electromotive force detected by the Peltier element 13 is 3.5 mV or more, the process proceeds to step S2. Then, the operation by the heater 9 is switched to 150% of the set value.

  In step S1, when the electromotive force detected by the Peltier element 13 is not 3.5 mV or more, the process proceeds to step S3. In step S3, it is determined whether or not the electromotive force detected by the Peltier element 13 is 2.8 mV or higher. When it is determined that the electromotive force detected by the Peltier element 13 is 2.8 mV or more, the process proceeds to step S4. Then, the operation by the heater 9 is switched to 100% operation of the set value.

In step S3, when the electromotive force detected by the Peltier element 13 is not 2.8 mV or more, the process proceeds to step S5. In step S5, it is determined whether or not the electromotive force detected by the Peltier element 13 is 2.4 mV or more. If it is determined that the electromotive force detected by the Peltier element 13 is 2.4 mV or more, the process proceeds to step S6. And after waiting for 1 second, it returns to step S1.
Even in the case of steps S2 and S4, after switching the operation, the process proceeds to step S6, waits for one second, and then returns to step S1.

  In step S5, when it is determined that the electromotive force detected by the Peltier element 13 is not 2.4 mV or more, the process proceeds to step S7, and energization of the heater 9 is turned “OFF”. Then, the process proceeds to step S8, where it is determined whether or not 30 seconds have elapsed. If 30 seconds have elapsed, the process returns to step S1 and the same processing is performed.

As described above, according to the present embodiment, the following effects can be obtained.
First, the temperature difference between the surface temperature of the warm air side glass plate 5 and the air temperature on the warm air side and in the immediate vicinity of the warm air side glass plate 5 is detected using only the Peltier element 13 as a single sensor. Since the heater 9 is controlled, the configuration can be simplified, the number of man-hours, the number of parts, and the cost can be reduced as compared with the conventional configuration requiring two sensors.
In this embodiment, the Peltier element 13 is used to detect the temperature difference between the surface temperature of the warm air side glass plate 5 and the air temperature on the warm air side and in the immediate vicinity of the warm air side glass plate 5. Therefore, it is possible to respond effectively and quickly to cold drafts and condensation.
In addition, the heating by the heater 9 can be suppressed to the minimum necessary for the cold draft, thereby reducing the energy consumption.
Further, since the Peltier element 13 is attached to the lower corner of the warm air side glass plate 5 where the temperature is low, it can effectively cope with cold draft and condensation. it can.
In the case of the present embodiment, the temperature difference between the surface temperature of the warm air side glass plate 5 and the air temperature on the warm air side and closest to the warm air side glass plate 5 is divided into a plurality of stages, specifically, three stages. Since the heaters 9 are controlled with different contents, the cold draft and the dew condensation can be effectively dealt with.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the case of the first embodiment, after the energization of the heater 9 is turned “OFF”, the same processing is repeated after 30 seconds in step S8. In the case of this form, in step S8 ′, it is configured to determine whether or not the electromotive force detected by the Peltier element 13 is 2.8 mV or more. When it is determined that the electromotive force detected by the Peltier element 13 is 2.8 mV or more, the process returns to step S1 to perform the same processing.

  Other configurations are the same as those of the first embodiment, and therefore, the same effects as those of the first embodiment can be obtained.

  Next, a third embodiment will be described with reference to FIG. In this case, a flat plate-like heat transfer member 41 is attached to the surface of the Peltier element 13, and other than that is the same as in the first and second embodiments. The temperature difference can be detected with higher accuracy by the heat transfer material 41, thereby more effectively dealing with cold drafts and condensation.

  Next, a fourth embodiment will be described with reference to FIG. In this case, a fin-like heat transfer member 51 is attached to the surface of the Peltier element 13, and the other parts are the same as those in the first and second embodiments. On the heat transfer member 51, a plurality of protrusions 53 are projected and formed in a fin shape, and the heat transfer area is greatly enlarged as a whole. The temperature difference can be detected with higher accuracy by the heat transfer member 61, thereby more effectively dealing with cold drafts and condensation. In particular, it is effective because it has a fin shape and its heat transfer area is enlarged.

The present invention is not limited to the first to fourth embodiments.
In the first to fourth embodiments, the energization heating glass composed of two glass plates has been described as an example, but the energization composed of one glass plate and three or more glass plates. It can also be applied to exothermic glass.
In addition, regarding the configuration of the energized superheated glass, the heater is schematically shown in the above embodiments, but various configurations such as a sheet-like one and a coated one can be considered as the configuration of the heating means.
There is no particular limitation on the application of the energized heat generating glass device.
As the contents of control by the control means, in each of the above-described embodiments, the temperature difference is controlled in three stages, but it may be further divided and controlled. Can be considered.
Further, the set value for the control is arbitrarily set, and is not particularly limited. In addition, various setting values are arbitrarily set according to the purpose, for example, when a cold draft is mainly targeted, when condensation is mainly targeted, or when both are targeted.

  INDUSTRIAL APPLICABILITY The present invention can be effectively applied as an energized heat generating glass device that can effectively prevent cold draft and / or condensation.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a figure which shows the structure of the whole electricity supply heat generating glass apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a partial perspective view which shows the attachment structure of the temperature difference detection means which consists of a Peltier device. It is a figure which shows the 1st Embodiment of this invention and is a figure which shows the drive principle of a Peltier device. It is a figure which shows the 1st Embodiment of this invention, and is a flowchart which shows the content of control by a control means. It is a figure which shows the 2nd Embodiment of this invention, and is a flowchart which shows the content of control by a control means. It is a figure which shows the 3rd Embodiment of this invention, and is a perspective view which shows the structure of the temperature difference detection means which consists of a Peltier device. It is a figure which shows the 4th Embodiment of this invention, and is a perspective view which shows the structure of the temperature difference detection means which consists of a Peltier device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric heating glass 3 Cold air side glass plate 5 Warm air side glass plate 7 Frame 9 Heater 11 Window frame 13 Peltier element 27 Control means 41 Heat transfer member 51 Heat transfer member

Claims (1)

Energized heating glass with heating means;
A Peltier element that is attached to the warm air side of the energized heat generating glass and detects the difference between the temperature of the warm air side of the energized heat generating glass and the ambient temperature of the warm air side close to the warm air side;
Control of the heat generating means based on the detection signal from the Peltier element to prevent cold draft and / or condensation, and control the output of the heat generating means in a plurality of stages based on a preset temperature difference of a plurality of stages. And a control means for turning off the heat generating means when the temperature difference falls below a preset minimum temperature difference ;
An energizing heat generating glass device characterized by comprising:

Images