JP2002227113A - Planar heating unit for snow melting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planar heating unit for a snow melting device shortening the snow melting time, saving energy by saving electricity, and simplifying the installation work. SOLUTION: The planar heating unit is provided with a surface plate 12 arranged at the upper section of a case 11 fitted with a heating element 10 feeding a snow melting heat quantity and heated by the snow melting heat quantity fed by the heating element 10 and a connection section plate protecting a connection section connecting the heating element 10 to a power supply feeding electric power to the heating element 10. When the heating element 10 of the case 11 is excited at a snowfall, the snow melting heat quantity is fed to the surface plate 12 at the upper section, and a snow melting effect can be exerted. Only the connection section plate is required to be removed at execution, and the installation work is very simple.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar heating element mainly used in a snow melting apparatus, and more particularly to a structure for efficiently melting snow in a home or a shop.

[0002]

2. Description of the Related Art Conventionally, in a cold region with a lot of snow, snow removal work on public roads, as well as on the premises of ordinary households and shops, especially from the sidewalk to the entrance, garage or parking space of ordinary households, requires snow removal. Has become a major problem in everyday life.

In order to solve this problem, there is a snow melting apparatus in which a heating wire, a hot water pipe, or the like is buried in the ground of the premises as a heating element and a road surface is heated to melt snow. The “heating wire” generates heat by Joule heat when energized, and the “hot water pipe” generates heat by circulating hot water (actually, antifreeze) heated by combustion of a kerosene boiler as a heat medium. Generally, the road surface temperature is raised by these heatings to melt snow on the road surface. Such a snow melting device is also called a road heating device or a road heating. Figure 1
0 will be described.

[0004] The heating wire 104 as a heating element is connected to the subgrade 1.
01 is laid along with a metal mesh on the upper surface of the base material 01, and is buried in a concrete roadbed portion 102 and an asphalt pavement portion 103. Of course, there is a hot water pipe buried at the position of the heating wire 104, but the basic configuration of the buried portion is the same.

[0005] Such a snow melting apparatus 100 includes a snowfall 105.
Equipped with a snowfall sensor, a temperature sensor, a ground temperature sensor, and a moisture sensor (sensors are not shown) for automatic detection according to the signal from each sensor, or manual operation at the user's discretion And a control device for performing the control.

[0006]

In the above-described conventional snow melting apparatus 100, a heating wire 104 or a hot water pipe as a heating element is buried in the ground at a distance of about 100 mm from the ground surface. Therefore, even if the sensor detects the snowfall 105 and immediately starts the automatic operation or starts the manual operation, for a while, the heating wire 104 serving as a heating element heats the ground on the upper part thereof. In order to raise the temperature of the entire snow melting apparatus 100, an operation time and electric energy are required, and it is not possible to immediately melt the snow deposited on the ground by the snowfall 105. Thus, it takes time to melt snow. The same is true for the hot water pipe.

[0007] The snowfall 105 rarely occurs continuously for 24 hours, and it often occurs intermittently. Therefore, the operation of the snow melting apparatus 100 is often intermittent, and each time the temperature of the snow melting apparatus 100 decreases due to low-temperature outside air. Therefore, at the time of the next snowfall, it takes time to reheat the entire once cooled road surface. Even for such reasons, the consumption of electricity or kerosene increases, so that the running cost is high.

As described above, when considered throughout the snow season, the proportion of energy used for raising the temperature of the snow melting apparatus 100 itself is large, and the energy loss due to intermittent operation is also large. From this point, it can be said that the conventional snow melting apparatus has an inappropriate snow melting performance and has low energy use efficiency.

Of course, since the snow melting apparatus 100 buries a heating element in the ground by civil engineering, the construction requires a long construction period and the construction cost is high.

[0010] Therefore, there are mat-shaped heating elements that need only be placed in places where traffic is mainly performed, such as entrances and stairs. In general, this is a rubber sheet having a heating element integrally formed therein, and can melt snow on the surface relatively quickly if electricity is supplied during snowfall. Such a material is also called a snow melting mat.

However, in general, the thickness of the rubber sheet is about 10 mm, and the rubber sheet is not strong enough to withstand the weight of the automobile, so that it cannot be used for a parking space. Also, the strength of the umbrella tip or the sharpness of the umbrella when struck by a sharp object is not sufficient with a rubber sheet. Therefore,
In such a configuration, it can be said that there is a problem regarding the parking space and the durability strength as an approach thereof. Also, if the surface is deteriorated due to surface scratches or discoloration, it is necessary to replace the entire heating element, and daily maintenance requires considerable work and replacement costs, so it is said that it is excellent in maintainability. I can not say.

That is, the conventional snow melting apparatus 100 and the snow melting mat have problems in terms of snow melting performance, durability and maintenance in order to be used for a parking space or approach in the premises.

The present invention provides a planar heating element for a snow melting apparatus which obtains necessary durability and is easy to maintain and maintain, in order to solve the above problems of the conventional snow melting apparatus. The purpose of the present invention is to provide a planar heating element that can reduce the time required to melt snow, save energy by conserving electricity, and simplify the wiring work at the time of installation by exhibiting optimal snow melting performance for snowfall characteristics in cold regions. It is what it is.

[0014]

A sheet heating element for a snow melting apparatus according to the present invention is installed on the ground surface and supplies a heating element for supplying heat for snow melting, a case equipped with the heating element, and an upper part of the case. A surface plate that is disposed in the heat plate and generates heat with the amount of heat for snow melting supplied by the heating element, a power supply that supplies power to the heating element, and a connection portion that connects the power supply and the heating element,
And a connection portion plate for protecting the connection portion.

According to the present invention, when electricity is supplied to the heating element of the case during snowfall, the amount of heat for snow melting is supplied to the upper surface plate. Since the temperature of the surface plate is quickly raised to exert the snow melting effect, snow melting can be performed in a short time.
Further, at the time of construction, since the surface plate and the connection portion plate are divided on the case and the connection portion, only the connection portion plate needs to be removed, and the operation is very simple.
That is, the temperature of the surface plate is quickly raised,
It is a planar heating element for a snow melting device that can realize excellent snow melting performance with a small amount of power consumption and can shorten the connection work time during installation.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a heating element for supplying heat for snow melting, a case to which the heating element is mounted, and a heat for snow melting disposed on the upper part of the case and supplied by the heating element. And a power supply for supplying power to the heating element, a connection portion for connecting the power supply and the heating element, and a connection portion plate for protecting the connection portion.

According to the present invention, when the heating element of the case is energized at the time of snowfall, the heat quantity for snow melting is supplied to the upper surface plate. Since the temperature of the surface plate is quickly raised to exert the snow melting effect, snow melting can be performed in a short time.
Further, at the time of construction, since the surface plate and the connection portion plate are divided on the case and the connection portion, only the connection portion plate needs to be removed, and the operation is very simple.
That is, it is a planar heating element for a snow melting apparatus that can raise the temperature of the surface plate more quickly, realize excellent snow melting performance with a small amount of power consumption, and shorten the work time at the time of installation.

According to a second aspect of the present invention, the surface plate covers a part of the case, and the connection part plate covers a part of the case and the connection part.

According to the present invention, when the heating element of the case is energized at the time of snowfall, the heat quantity for snow melting is supplied to the upper surface plate. Since the temperature of the surface plate is quickly raised to exert the snow melting effect, snow melting can be performed in a short time.
Further, since the connection portion plate covers a part of the case, snow can be melted by heat conduction on the connection portion where the heating element is not provided at the lower portion. That is, it is a planar heating element for a snow melting apparatus that can quickly increase the temperature of the surface plate and the connection portion plate, realize excellent snow melting performance with a small amount of power consumption, and shorten the work time at the time of installation.

According to a third aspect of the present invention, there is provided a connection portion plate using a material having good heat conductivity. According to this invention, if electricity is supplied to the heating element of the case during snowfall,
The upper surface plate is supplied with heat for melting snow. Since the temperature of the surface plate is quickly raised to exert the snow melting effect, snow melting can be performed in a short time. In addition, since the connection portion plate in which the heating element is not mounted on the lower portion uses a material having good heat conductivity, heat is transferred from the contacting surface plate to melt snow.

In addition, since the surface plate and the connection part plate are divided on the case and the connection part at the time of construction, only the connection part plate needs to be removed, and the operation is very simple. That is, it is a planar heating element for a snow melting apparatus that can quickly raise the temperature of the surface plate, realize excellent snow melting performance with a small amount of power consumption, and shorten the connection work time at the time of installation.

According to a fourth aspect of the present invention, there is provided a connection portion plate having a rib.

According to the present invention, when the heating element of the case is energized at the time of snowfall, the calorific value for snow melting is supplied to the upper surface plate. Since the temperature of the surface plate is quickly raised to exert the snow melting effect, snow melting can be performed in a short time.
Moreover, since the connection part plate in which the heating element is not mounted on the lower part secures a large contact area with the surface plate by the rib part, heat can be effectively transferred and snow melting can be performed.

Also, at the time of construction, since the surface plate and the connection portion plate are divided on the case and the connection portion,
Only the connection part plate needs to be removed, and the operation is very simple. That is, it is a planar heating element for a snow melting apparatus that can quickly raise the temperature of the surface plate, realize excellent snow melting performance with a small amount of power consumption, and shorten the work time at the time of installation.

According to a fifth aspect of the present invention, the connection portion is provided on an upper portion of the case.

According to the present invention, after the sheet heating element is laid on the ground, a connection portion provided on the case can be connected to a power source or another sheet heating element via a lead wire or the like. Further, the maintenance of the connection portion may be performed by removing only the connection portion plate, the operation is very simple, and a sheet heating element for a snow melting apparatus which realizes excellent snow melting performance can be provided.

[0027] The invention according to claim 6 is that the connection portion is provided on the side surface of the case.

According to the present invention, after the sheet heating element is laid on the ground, it can be connected to a power supply or another sheet heating element via a lead wire or the like at a connection portion provided on the side surface of the case. Further, since the connection portion is provided on the side surface portion, the heating element can be mounted over the entire surface of the case, the snow can be uniformly melted over the entire surface plate, and no melting remains. Further, since the load from the upper portion is not directly applied to the connection portion, the structure is excellent in durability.

Further, the maintenance of the connection portion may be performed by removing only the connection portion plate, the operation is very simple, and a sheet heating element for a snow melting apparatus which realizes excellent snow melting performance can be provided.

According to a seventh aspect of the present invention, the connection portion is provided at a lower portion of the case.

According to the present invention, the planar heating element is laid on the ground by connecting to a power source or another planar heating element via a lead wire or the like at a connection portion provided at the lower portion of the case. Since the connection portion is provided at the lower portion, the heating element can be mounted on the entire surface of the case, the snow can be uniformly melted over the entire surface of the surface plate, and no melting remains. Further, since the load from the upper portion is not directly applied to the connection portion, the structure is excellent in durability.

Further, the maintenance of the connection portion may be performed by removing only the connection portion plate, and the operation is very simple, and a sheet heating element for a snow melting apparatus which realizes excellent snow melting performance can be provided.

[0033]

Embodiments of the present invention will be described below with reference to the drawings.

(Example 1) As shown in FIG. 1, a plurality of sheet heating elements 1 are installed on the upper surface of a pavement section 2 on a roadbed section 3 to form a snow melting apparatus 5 for melting snowfall 4. And
As shown in FIG. 2, a snow melting device laying section 9 including an approach from a sidewalk 6 to an entrance 7 and a parking space 8 is formed.

FIGS. 3 and 4 show the internal structure and perspective view of the planar heating element 1. FIG. Reference numeral 10 denotes a heating element in which heating wires that generate heat when electricity is supplied are provided at predetermined intervals. Reference numeral 11 denotes a resin case for mounting the heating element 10, and the heating element 10 is held in a groove on the upper surface of the case 11. Reference numeral 12 denotes a surface plate disposed on the upper part of the case 11. Reference numeral 13 denotes a power supply for supplying power to the heating element 10 and includes a connection portion 14 that can be connected to the power supply 13 and the heating element 10 or another planar heating element. The connection part plate 15 protects the connection part 14. 16,
Reference numeral 17 denotes a fixing bolt for detachably fixing the surface plate 12 and the connection portion plate 15 to the upper portion of the case 11, and is attached to a screw hole provided in the case 11. Of course, one fixing bolt 16, 17 is shown in FIG. 4, but it goes without saying that a plurality of fixing bolts are actually used and fixed. In addition, this snow melting device 5 includes a snowfall sensor for detecting the snowfall 4, a temperature sensor,
Similar to the conventional one, it has a ground temperature sensor (illustration of sensors is omitted) and a control device for automatic operation according to the signal from the sensor or manual operation at the user's discretion. It is.

An operation method of the snow melting apparatus 5 shown in FIGS. 1 to 4 will be described. For the sake of simplicity, it is assumed that the user determines that there is snowfall 4 and starts driving. The control device starts energizing the heating element 10 and heats the surface plate 12 by the generated heat. Since the heat capacity of the sheet heating element 1 is small and is installed on the surface of the pavement section 2, the surface temperature of the sheet heating element 1, especially the surface plate 12, rises in a short time with a predetermined power consumption. I do. As soon as the snowfall 4 is deposited on the surface of the sheet heating element 1, the heat energy supplied subsequently is used as heat of melting to turn it into snowmelt water, and the snowmelt is performed in a short time.

When the user determines that the snowfall 4 has stopped, the user may stop driving immediately. Of course, automatic driving can be performed based on the signal of the sensor. In any case, compared to the conventional snow melting apparatus 100, in a short time,
Therefore, snow melting can be performed with a small amount of power consumption.

The actual snowfall 4 rarely occurs continuously for 24 hours, and may occur intermittently from night to early morning, but not intermittently during the day. Many. That is, the operation of the snow melting device,
It is often intermittent. Therefore, each time
Although the sheet heating element 1 is cooled once, the reheating can be performed in a short time. For that reason, the running cost of the snow melting device is also low because the power consumption of the planar heating element 1 may be small.

The features of this embodiment will be described below.

The surface plate 12 and the connection portion plate 15 are divided on the case 11. Therefore, at the time of construction, it is sufficient to remove only the connection portion plate 15 without removing the surface plate 12 from the case 11, and the operation is very simple. In other words, the surface heating element 1 for the snow melting apparatus 5 can quickly increase the temperature of the surface plate 12 to realize excellent snow melting performance with a small amount of power consumption and shorten the work time at the time of installation. Can be.

The surface plate 12 and the connection portion plate 15 are made of metal having excellent durability and weather resistance.

In the present embodiment, the heating element 10 is in contact with the surface plate 12, but by making the depth of the groove of the case 11 slightly smaller than the outer diameter of the heating element 10, Can be fixed in close contact with the surface plate 12.

In this case, when the heating element 10 is energized at the time of snowfall, the heat is supplied to the surface plate 12 which is in close contact with the heating element 10, and the temperature of the surface plate 12 immediately rises. Therefore, snow melting can be done in a shorter time,
The heat generated by the heating element 10 is efficiently used as the heat for melting snow. That is, it is possible to provide the snow melting device 5 that achieves even better snow melting performance.

Further, a high-frequency current may be applied to the heating element 10 to directly inductively heat the metal surface plate 12 to form a heating element. Since the surface plate 12 made of metal is heated by induction heating, the surface temperature can be increased very quickly and snow can be melted in a short time.

Of course, since induction heating is used, it goes without saying that even if there is a gap or reinforcing material between the surface plate 12 and the heating element 10, it can be heated unless these are made of a metal material, especially a magnetic material. .

Although not shown, the front plate 12, the case 11, and the connection plate 1 of this embodiment are not shown.
A rubber packing is mounted between the case 5 and the case 11 as a seal member for ensuring watertightness. It goes without saying that various processing methods are possible, such as forming a seal portion by filling the outer edge portion of the groove portion, the surface plate 12 and the connection portion plate 15 with an adhesive.

Further, the surface of the surface plate 12 and the connection portion plate 15 is subjected to a surface treatment of a non-slip having fine irregularities, and a paint containing a particulate mixture exhibiting a non-slip effect (this impurity is (Also called aggregate)
It is possible to prevent a person or a car from slipping carelessly with snowmelt water or rainwater by coating.

The connecting means is fixed by screws, inserted by plugs, or the like.
If the resin is protected with a potting agent, the water resistance is also improved.

(Embodiment 2) In this embodiment, the basic configuration of the snow melting apparatus 5 is the same as that of Embodiment 1, and the description of the basic configuration will be omitted. The second embodiment is different from the first embodiment in the configuration of the connection portion plate 19, and this point will be mainly described.

As shown in FIG. 5, reference numeral 10 denotes a heating element, in which heating wires which generate heat when electricity is supplied are provided at predetermined intervals. Reference numeral 11 denotes a resin case for mounting the heating element 10, and the heating element 10 is held in a groove on the upper surface of the case 11. Reference numeral 18 denotes a surface plate 18 arranged on the upper part of the case 11. 13 is a heating element 10
And a connection portion 14 for connecting to the heating element 10 and the power source 13 or another planar heating element. The connection portion plate 19 protects the connection portion 14 and also protects a part of the case in which the heating element 10 is mounted. Reference numerals 16 and 17 denote fixing bolts for detachably fixing the surface plate 18 and the connection portion plate 19 to the upper portion of the case 11, and are attached to screw holes provided in the case 11. Of course, one fixing bolt 16, 17 is shown in FIG. 5, but it goes without saying that a plurality of fixing bolts 16 and 17 are actually used and fixed.

With the above configuration, this embodiment mainly has the following three features.

First, the surface plate 18 covers part of the case 11 and the connection part plate 19 covers the connection part 14 and part of the case 11.

According to the present invention, when the heating element 10 of the case 11 is energized at the time of snowfall, the heat quantity for snow melting is supplied to the upper surface plate 18. Since the temperature of the surface plate 18 is quickly raised to exert the snow melting effect, snow melting can be performed in a short time. Further, the connection portion plate 19 is
Since the upper part is covered, snow can be melted by heat conduction also on the connection part 14 where the heating element 10 is not mounted on the lower part.

Further, the connection work in the installation of the planar heating element may be performed by removing only the connection portion plate 19 while the front plate 18 is attached to the case 11, and the labor can be saved.

Also, during maintenance work at the time of failure,
It is a very simple configuration for checking the conductivity and the like of the connection portion.

That is, the surfaces of the surface plate 18 and the connection portion plate 19 are quickly raised to realize excellent snow melting performance with a small amount of power consumption, and a surface for a snow melting device capable of shortening a connection work time at the time of installation. Heating element.

Second, a connection portion plate 21 made of a material having good heat conductivity is provided. This will be described with reference to FIG. The connection portion plate 21 is made of a metal material in order to have strength enough to withstand the weight of an automobile or the like,
Further, a product obtained by applying a powder or liquid such as aluminum having good heat conductivity to a strong metal may be used.

According to the present invention, when the heating element 10 of the case 11 is energized at the time of snowfall, the heat quantity for snow melting is supplied to the upper surface plate 20. Since the temperature of the surface plate 20 is quickly raised to exert the snow melting effect, the snow melting can be performed in a short time. When the heating element 10 is not mounted below the connection plate 21, the connection plate 21
Is made of a material having good thermal conductivity, so that heat is transferred from the contacting surface plate 20, and the heat melts. When the heating element 10 is mounted below the connection portion plate 21, the connection portion plate 21 quickly generates heat and melts snow.

Further, at the time of construction, since the surface plate 20 and the connection portion plate 21 are divided on the case 11 and the connection portion 14, only the connection portion plate 21 needs to be removed, and the operation is very simple.

That is, the temperature of the surface plate 20 and the connection portion plate 21 are raised more quickly, thereby realizing excellent snow melting performance with a small amount of power consumption, and shortening the connection work time at the time of installation. Is a planar heating element.

Third, there is provided a connection portion plate 23 having a rib 24 that comes into contact with the surface plate 22. This will be described with reference to FIG.

According to the present invention, when the heating element 10 of the case 11 is energized at the time of snowfall, the heat quantity for snow melting is supplied to the upper surface plate 22. Since the temperature of the surface plate 22 is quickly raised to exert the snow melting effect, the snow melting can be performed in a short time. In the connection portion plate 23 where the heating element 10 is not mounted on the lower portion, the ribs 24 are in contact with the lower portion of the surface plate 22 and the contact area with the surface plate 22 is ensured to be large, so that the connection portion plate 23 is effective. The heat is transferred to the snow and can melt snow.

Further, since the surface plate 22 and the connection portion plate 23 are divided on the case 11 and the connection portion 14 at the time of construction, it is sufficient to remove only the connection portion plate 23 and the operation is very simple.

That is, the present invention is a planar heating element for a snow melting apparatus capable of rapidly increasing the temperature of the surface plate 22 and realizing excellent snow melting performance with a small amount of power consumption and shortening the working time at the time of installation.

(Embodiment 3) In this embodiment, the basic configuration of the snow melting apparatus 5 is the same as that of Embodiment 1, and the description of the basic configuration will be omitted. The third embodiment is different from the first and second embodiments in the configuration of the sheet heating element 1, and the description will be focused on this point.

As shown in FIGS. 8 to 10, the connection portion 26 is located above the case 25, the connection portion 29 is located on the side surface of the case 28, and the connection portion 33 is located below the case 32.

The features of this embodiment are as follows.

First, the connection portion 26 is provided above the case 25. In the present invention described with reference to FIG. 8, after the sheet heating element 1 is laid on the ground, the case 25
The connection portion 26 provided above can connect to a power supply or another planar heating element via a lead wire or the like.

Further, the maintenance of the connection portion 26 may be performed by removing only the connection portion plate 27, and the work is very simple, and the sheet heating element 1 for the snow melting device 5 which realizes excellent snow melting performance.

Second, the connection portion 29 is provided on the side surface of the case 28. This will be described with reference to FIG.

According to the present invention, after the sheet heating element 1 is laid on the ground, a connection portion 29 provided on the side surface of the case 28 is formed.
Thus, it can be connected to a power supply or another planar heating element via a lead wire or the like. Further, since the connection portion 29 is provided on the side surface portion, the heating element 10 can be mounted over the entire upper surface of the case 28. That is, snow can be melted over the entire surface of the surface plate 30, and no melting remains.

Also, the load from directly above the connection portion 29
Since it does not stick, the structure is excellent in durability.

Further, the maintenance of the connection portion 29 may be performed by removing only the connection portion plate 31, which is very simple in operation, and is the sheet heating element 1 for the snow melting apparatus 5 which realizes excellent snow melting performance.

Third, the connection portion 33 is provided on the side surface of the case 32.

In the present invention, the sheet heating element is laid on the ground by connecting to a power source or another sheet heating element via a lead wire or the like at the connection section 33 provided at the lower portion of the case 32. The contractor or user performs the connection work with the lower part of the sheet heating element facing up, and after the connection, installs the plurality of lower parts of the sheet heating element toward the ground side. Since the connection portion 33 is provided at the lower portion, the heating element 10 can be mounted over the entire upper surface of the case 32. That is, snow can be melted over the entire surface of the surface plate 34, and no melting remains. In addition, the load from the top directly
The structure is excellent in durability because it does not involve 3.

Further, the maintenance of the connection portion 33 can be achieved by removing only the connection portion plate 35, the operation is very simple, and the sheet heating element 1 for the snow melting apparatus 5 which realizes excellent snow melting performance can be provided.

[0077]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, when electricity is supplied to the heating element of the case during snowfall, the amount of heat for snow melting is supplied to the upper surface plate, and the temperature of the surface plate is rapidly increased to improve the snow melting effect. Because it demonstrates, it can melt snow in a short time. Further, at the time of construction, since the surface plate and the connection portion plate are divided on the case and the connection portion, only the connection portion plate needs to be removed, and the operation is very simple.

That is, it is possible to provide a planar heating element for a snow melting apparatus capable of quickly raising the temperature of the surface plate, realizing excellent snow melting performance with a small amount of power consumption and shortening the working time at the time of installation.

According to the second aspect of the present invention, the surface plate covers a part of the case, and the connection part plate covers a part of the case and the connection part. When the heating element is energized, the upper surface plate is supplied with heat for melting snow. Since the temperature of the surface plate is quickly raised to exert the snow melting effect, snow melting can be performed in a short time. In addition, since the connection portion plate covers a part of the case, snow can be melted by heat conduction on the connection portion where the heating element is not attached to the lower portion.

That is, the temperatures of the surface plate and the connection portion plate are quickly raised to reduce the power consumption and
It is possible to provide a sheet heating element for a snow melting apparatus which can realize excellent snow melting performance and can shorten the work time at the time of installation.

According to the third aspect of the present invention, the connection plate made of a material having good heat conductivity is provided, so that when the heating element of the case is energized at the time of snowfall, the upper surface plate melts. Heat is supplied. As the temperature of the surface plate is quickly raised to exert the snow melting effect,
Melt snow in a short time. In addition, since the connection portion plate in which the heating element is not mounted on the lower portion is made of a material having good thermal conductivity, heat is transferred from the contacting surface plate, and the heat melts the snow.

Further, at the time of construction, since the surface plate and the connection portion plate are divided on the case and the connection portion, only the connection portion plate needs to be removed, and the operation is very simple.

That is, a surface heating element for a snow melting apparatus can be provided which can quickly raise the temperature of the surface plate, realize excellent snow melting performance with a small amount of power consumption, and shorten the working time at the time of installation. .

According to the fourth aspect of the present invention, particularly, since the connection portion plate having the rib is provided, when the heating element of the case is energized at the time of snowfall, the heat quantity for snow melting is supplied to the upper surface plate. . Since the temperature of the surface plate is quickly raised to exert the snow melting effect, snow melting can be performed in a short time. Moreover, since the connection part plate in which the heating element is not mounted on the lower part secures a large contact area with the surface plate by the rib part, heat can be effectively transferred and snow melting can be performed.

Further, at the time of construction, since the surface plate and the connection portion plate are divided on the case and the connection portion, only the connection portion plate needs to be removed, and the operation is very simple.

That is, it is possible to provide a planar heating element for a snow melting apparatus capable of quickly raising the temperature of the surface plate, realizing excellent snow melting performance with a small amount of power consumption and shortening the work time at the time of installation. .

According to the fifth aspect of the present invention, in particular, since the connection portion is provided on the upper portion of the case, the sheet heating element is laid on the ground, and then the connection portion provided on the case is provided. A power supply or another planar heating element can be connected via a lead wire or the like. Further, the maintenance of the connection portion may be performed by removing only the connection portion plate, the operation is very simple, and a sheet heating element for a snow melting apparatus which realizes excellent snow melting performance can be provided.

According to the sixth aspect of the invention, in particular, since the connection portion is provided on the side surface of the case, the planar heating element is laid on the ground, and then the connection portion provided on the side surface of the case. Thus, a power supply or another planar heating element can be connected via a lead wire or the like. Also, since the connection part is provided on the side part,
Snow melting can be performed over the entire surface plate,
There is no unmelted residue. Further, since the load from the upper portion is not directly applied to the connection portion, the structure is excellent in durability.

Further, the maintenance of the connection portion may be performed by removing only the connection portion plate, the operation is very simple, and a planar heating element for a snow melting apparatus realizing excellent snow melting performance can be provided.

According to the seventh aspect of the present invention, in particular, since the connection portion is provided at the lower portion of the case, the connection portion provided at the lower portion of the case has a power supply or another planar surface via a lead wire or the like. The heating elements are connected, and the sheet heating elements are laid on the ground. Since the connection portion is provided at the lower portion, snow can be melted over the entire surface of the front plate, and no melting remains. Further, since the load from the upper portion is not directly applied to the connection portion, the structure is excellent in durability.

Further, the maintenance of the connection portion may be performed by removing only the connection portion plate, the operation is very simple, and a planar heating element for a snow melting apparatus which realizes excellent snow melting performance can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an installation structure of a snow melting apparatus according to a first embodiment of the present invention.

FIG. 2 is an external view showing an installation location of the snow melting apparatus of the first embodiment.

FIG. 3 is a sectional view of a main part of the sheet heating element of the first embodiment.

FIG. 4 is a perspective view of a sheet heating element according to the first embodiment.

FIG. 5 is a perspective view of a sheet heating element according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a sheet heating element according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a sheet heating element according to a second embodiment of the present invention.

FIG. 8 is a perspective view of a sheet heating element according to a third embodiment of the present invention.

FIG. 9 is a perspective view of a sheet heating element according to a third embodiment of the present invention.

FIG. 10 is a cross-sectional view of a main part showing an installation structure of a conventional snow melting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Planar heating element 2 Pavement part 3 Roadbed part 4 Snowfall 5 Snow melting device 6 Sidewalk 7 Entrance 8 Parking space 10 Heating element 11 Case 12 Surface plate 13 Power supply 14 Connection part 15 Connection part plate 16 Fixing bolt 101 Roadbed part 102 Concrete roadbed Part 103 Asphalt pavement part 104 Heating wire

Continued on the front page (72) Inventor Shinji Kondo 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Katsunori Zaima 1006 Okadoma Kadoma, Kadoma City Osaka Pref. 2D026 CL02 CL03 2D051 GA01 GB02 3K034 AA04 AA12 AA16 BB04 BB14 BC08 BC15 EA11 FA13 GA17 HA04 HA09 JA10

Claims (7)

[Claims] 1. A heating element for supplying heat for snow melting, a case to which the heating element is mounted, a surface plate disposed on an upper portion of the case and generating heat by the heat for snow melting supplied by the heating element, A sheet heating element for a snow melting device, comprising: a power supply for supplying power to the element; a connection portion for connecting the power supply and the heating element; and a connection portion plate for protecting the connection portion. 2. A surface plate covers a part of the case,
The planar heating element for a snow melting apparatus according to claim 1, wherein the connection portion plate covers a part on the case and the connection portion. 3. The sheet heating element for a snow melting apparatus according to claim 1, further comprising a connection portion plate made of a material having good heat conductivity. 4. The sheet heating element for a snow melting apparatus according to claim 1, further comprising a connection portion plate having a rib. 5. The sheet heating element for a snow melting apparatus according to claim 1, wherein the connection portion is provided on an upper portion of the case. 6. The planar heating element for a snow melting device according to claim 1, wherein the connection portion is provided on a side surface of the case. 7. The planar heating element for a snow melting apparatus according to claim 1, wherein the connection portion is provided at a lower portion of the case.