JP3320305B2 - Heater device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a PTC (Positive
The present invention relates to a heater device using a thermistor as a heating element, and more particularly to a heater device suitable for use in a commercial freezing warehouse or refrigerated warehouse.

[0002]

2. Description of the Related Art In order to store a large amount of fresh foods, frozen foods and the like, large-scale commercial freezing warehouses are used. The temperature in the freezer warehouse is extremely low, and the moisture contained in the air is
It becomes frost and adheres to the walls and floors of the freezer warehouse. Therefore, when outside air enters the warehouse when the goods are carried out or carried in, the moisture in the outside air solidifies and adheres to the floor or the like.
In a short period of time, the amount of frost adhering to the floor is also small, and the floor does not have unevenness of the ice layer. However, over a long period of time, there are places where frost is likely to adhere due to the state of the airflow in the freezing warehouse, and irregularities of the ice layer appear on the floor surface.

[0003] These irregularities may cause problems such as an obstacle in a carrying path of a heavy article (for example, a fish box containing large fresh fish) at the time of carrying in and out, and a failure to freely operate wheels of a bogie. Occurs. In addition, regardless of long term or short term
Even a slight ice layer on the floor may cause a worker to fall over. (Hereinafter, the formation of an ice layer on the floor is referred to as “frozen the floor.”) In order to prevent such freezing of the floor, an electric heater is embedded inside the floor material in a passage portion. There are also freezer warehouses. In this case, the electric heater is laid at a stage immediately before the floor surface is smoothly finished with concrete when the freezing warehouse is constructed.

[0004]

However, if an electric heater is used to prevent the floor from freezing, it is necessary to control the power supply in order to change the calorific value following the temperature change in the freezer warehouse. When a controller or the like is required, or when the temperature in the refrigerator rises abnormally, there is a possibility that abnormal overheating may occur. In addition, the electric heater generates the same amount of heat even at a relatively high temperature and a relatively low temperature, and cannot cope with the temperature distribution in the refrigerator.

[0005] Further, since frozen foods and the like are melted when heated by the heater, the frozen foods cannot be placed at a place where the heater is provided. On the other hand, since the electric heater is laid at the time of construction of the freezing warehouse, the space for placing the frozen food or the like is limited to a place where the heater is not provided. Also, the layout of the heater installation location cannot be changed after the construction of the freezing warehouse. In addition, maintenance is difficult such that the concrete floor must be peeled off when a failure occurs in the heater.

Furthermore, if the floor is heated only by the electric heater, the condensed moisture accumulates on the floor, and the scaffold may be deteriorated and the floor may become dirty. In order to be able to change the layout of heater locations, for example,
It is conceivable to configure a heater device to be arranged on the floor surface of a freezing warehouse by improving the heat retaining saw for bathroom floor heating disclosed in the specification of Japanese Patent Application No. 5-111492. However, since the bathroom heat sink disclosed in the above specification has a heating wire embedded in a floorboard, it is not possible to solve the above-described problems when an electric heater is used.

It is an object of the present invention to solve the above-mentioned problems and to provide a heater device capable of achieving an appropriate amount of heat generation according to the ambient temperature. It is another object of the present invention to provide a heater device in which water condensed on the surface does not stay on the surface. Still another object of the present invention is to provide
An object of the present invention is to provide a heater device which can be arranged in various layouts and can further facilitate maintenance.

[0008]

According to the first aspect of the present invention, there is provided a heat insulating plate, comprising: a heat insulating plate;
And a plurality of heater modules arranged in parallel on
Wherein, each heater module top surface and the ceiling surface portion
The top surface has a lower surface serving as a heater mounting surface, and the liquid on the top surface is guided to a discharge path.
A heat-radiating member formed in a shape that can be formed and a tape-like member formed by coating a positive temperature coefficient thermistor element containing barium titanate as a main component, which is attached to a heater mounting surface of the heat-radiating member, with an insulating material. A tape-shaped heater , wherein the heat insulating material plate is provided with a heater for mounting the heat radiating member.
On the surface side to cover each tape-shaped heater
And the plurality of heater modules are provided on the heat insulating plate.
Opposite sides of adjacent heat dissipation members on one side
Between the parts, from the top surface of the top surface of the heat dissipation member to the side surface
The above-mentioned discharge path for discharging the liquid flowing down between
A heater device characterized by being arranged so as to be formed .

According to the first aspect of the present invention, since the heat generated from the tape-shaped heater is applied to the heat radiating member, it is possible to prevent the formation of an ice layer on the surface of the heat radiating member. Since the heat dissipating member has a shape capable of guiding the liquid on its surface to the discharge path, even if moisture in the atmosphere condenses on the surface of the heat dissipating member, the water does not stay . Also, between the opposing side surfaces of the adjacent heat dissipation member
A discharge path is formed and condensed on the surface of the heat dissipation member
Moisture is discharged through a discharge path between the side surfaces of the heat dissipating member.
Will be issued. Therefore, for example, this heater device
When used in a warehouse passage, the top surface of the heat dissipating member
No ice layer is formed on the
Water does not stay near the pool. Therefore, frozen
Workers in the warehouse can safely pass over the top
And the loading / unloading of goods using a trolley does not hinder
It can be done well. Insulation material to cover the tape heater
Are arranged so that the heating efficiency can be increased
You. In particular, this heater device is installed on the floor of a freezer or refrigerated warehouse.
When installing a floor, a floor with a large heat capacity and a table
Heating efficiency by shutting off the heater
Dramatically improved. Furthermore, several long heater models
Joules are arranged in parallel to form a heater device
Therefore, properly adjust the length and arrangement of the heater modules.
The size of the unit
It is possible to configure a heater device which is cut into a unit. He
Various types of
The heater device can be arranged
Outs can also be easily changed. And maintenance
Is also easy .

In addition, since the tape-shaped heater according to the present invention is constituted by using a positive temperature coefficient thermistor element containing barium titanate as a main component, the calorific value increases when the temperature is low, and the heat generation increases when the temperature is high. The amount is smaller. That is, by using the positive temperature coefficient thermistor element, the tape-shaped heater has a self-temperature control function.
Therefore, it is possible to achieve an appropriate amount of heat generation according to the temperature, and it is possible to efficiently use electric power.

Further, there is an advantage that there is no possibility of overheating by the self-temperature control of the tape-shaped heater. The invention of claim 2, wherein the above-mentioned tape heater is a heater device according to claim 1, characterized in that it is routed through at least two of the plurality of heater modules.

According to the second aspect of the present invention, at least
A tape heater is pulled through two heater modules.
The number of tape heaters to be used.
Module than the number of module modules. Yo
For secondary processing for power supply to the tape-shaped heater
Work is reduced. For example, all heater modules
If a single tape-shaped heater is routed through the
The need for secondary processing is almost eliminated.

[0013]

[0014]

[0015]

[0016]

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view of a heater device according to an embodiment of the present invention, and FIG.
It is the top view. The heater device 1 is installed, for example, at a location that becomes a passage in a freezing warehouse. The heater device 1 includes a heat insulating material plate 2 and a plurality (four in this embodiment) of heater modules 3 arranged on the heat insulating material plate 2.
And The heater modules 3 are arranged in parallel at a predetermined interval from each other, and a space between adjacent heater modules 3 is formed as a discharge path 7 for discharging liquid such as water condensed on the surface of the heater module 3. I have. The heat insulating material plate 2 is made of a molded article of a foamed resin such as a polystyrene foam, and has an appropriate size according to the use of the heater device 1.

The heater module 3 is provided with a heat radiating member 4 formed of, for example, a synthetic resin such as polystyrene. The heat dissipating member 4 has a substantially U-shaped cross section and includes a top surface portion 40 and a pair of side surface portions 41 and 42 falling from both longitudinal edges of the top surface portion 40. For example, the moisture condensed on the upper surface of the top panel 40 is guided from the top panel 40 to the discharge path 7 through the side sections 41 and 42. Therefore, liquid such as dew condensation does not stay on the upper surface of the top surface portion 40. The heater module 3 further includes a heat transfer plate 5 bonded to the lower surface of the top surface portion 40 and a tape-shaped heater 6 bonded to the lower surface of the heat transfer plate 5.

The heat transfer plate 5 is made of a material having excellent thermal conductivity, such as aluminum or copper, for example. It is formed in approximately the same size as. The heat transfer plate 5 is fixed to the top surface portion 40 of the heat dissipating member 4 with an adhesive, and the tape-like heater 6 is fixed to the lower surface of the heat transfer plate 5 with an adhesive. 2, the heater device 1 is completed.

FIG. 3 is a plan view showing the internal structure of the tape-shaped heater 6 with a part cut away, and FIG. 4 is a sectional view taken along the line AA in FIG. Referring to FIGS. 3 and 4, the tape-shaped heater 6 has a PTC (Positive Tempe).
A plurality of PTC thermistors 60 having characteristics (rature Coefficient) are used as heating elements. The PTC thermistor 60 is a chip-shaped semiconductor that generates heat when a voltage is applied, and contains, for example, barium titanate as a main component. The PTC thermistor 60 is a heat-sensitive element that has a low resistance from room temperature to the Curie temperature (rapid change temperature) Tc, but has a characteristic that the resistance increases when the temperature exceeds the Curie temperature Tc. Therefore, when a voltage is applied to the PTC thermistor 60 at a low temperature lower than the Curie temperature Tc, a large current flows due to a small resistance value, and as a result, the temperature rises rapidly. On the other hand, when the temperature exceeds the Curie temperature Tc, the resistance value increases and the amount of current flowing through the PTC thermistor 60 decreases, so the amount of heat generation decreases, so that the temperature does not rise above a certain temperature, and the temperature stabilizes. Can be kept. That is, the PTC thermistor 60
It has a self-temperature control function. Therefore, since a heat value corresponding to the temperature of each location can be obtained, it is not necessary to separately provide a temperature control circuit for controlling the heat value, an overheat prevention circuit, and the like.

The PTC thermistors 60 are provided in parallel at a predetermined distance from each other so as to straddle a pair of conductive wires 61 and 62 disposed parallel to the longitudinal direction of the tape-shaped heater 6. . The PTC thermistor 60 is fixed to the conductive wires 61 and 62 by a fastener 63 formed of a conductive metal. An ohmic electrode 64 formed by applying, for example, a silver paint is provided in a portion of the surface of the PTC thermistor 60 where the fastener 63 contacts, and the PTC thermistor 60 and the fastener 63 are ohmically connected. I have. Therefore, the current flows uniformly over the entire volume of the PTC thermistor 60. In addition, the fastener 6
3 and the ohmic electrode 64 are fixed by a conductive adhesive or solder.

The PTC thermistor 60, conductive wires 61 and 62, and fastener 63 are electrically insulating and PTC
It is covered with a covering member 65 made of a flexible material having heat resistance enough to withstand the heat generated by the thermistor 60, such as butyl rubber. The covering member 65 is a pair of members formed in a sheet shape, and is attached by being press-bonded while sandwiching the PTC thermistor 60, the conductive wires 61 and 62, and the fastener 63 from above and below. In addition to butyl rubber, rubber or resin having electrical insulation properties, heat resistance enough to withstand the heat generated by the PTC thermistor 60, and flexibility can be used for the covering member 65. A sealing member 66 made of rubber or resin having electrical insulation is attached to the tip of the tape-shaped heater 6 to seal the conductive wires 61 and 62 exposed at the tip of the covering member 65. As a result, waterproofness and electrical insulation are ensured.

From one end of the tape-shaped heater 6, the conductive wire 61
The lead wires 81 and 82 of the power cord 8 (see FIG. 2) are connected to the conductive wires 61 and 62, respectively. Therefore, when the power cord 8 is connected to an AC power source (not shown), a voltage from the AC power source is applied to the plurality of PTC thermistors 60 in parallel. As shown in FIG. 2, the connecting portions between the conductive wires 61 and 62 and the lead wires 81 and 82 are insulated and covered by a covering member 67 having electrical insulation.

Referring again to FIGS. 1 and 2, the heater device 1 of this embodiment is produced, for example, as follows. A heat transfer plate 5 made of aluminum is provided on the lower surface of the top surface portion 40 of the heat radiating member 4 made of a synthetic resin, for example, with an epoxy-based adhesive (Esdine 518X-2 manufactured by Sekisui Chemical Co., Ltd.).
And create four long structures. Then, the tape-shaped heater 6 is bonded to the lower surface of the heat transfer plate 5 bonded to the top surface portion 40 with an epoxy-based adhesive so that all of the plurality of structures pass through the single tape-shaped heater 6. Thereby, four heater modules 3 are created. on the other hand,
On the upper surface of the heat insulating material plate 2 integrally formed by the foamed resin,
Eight cuts into which the pair of side portions 41 and 42 of the heat radiating member 4 can be inserted are formed in parallel. The heater module 3 created as described above is connected to the heat insulating material plate 2.
By pressing the side portions 41 and 42 of the heat radiating member 4 into the slits in accordance with the positions of the slits formed on the upper surface of the heat sink 3, the heater module 3
Fixed to The heater module 3 is pushed into the heat insulating plate 2 until the heat transfer plate 5 and the tape-shaped heater 6 are covered by the heat insulating plate 2. At this time, the heater wire exposed from the end of the heater module 3 is laid on the heat insulating material plate 2. The heater modules 3 fixed on the heat insulating material plate 2 are arranged in parallel with each other, and of a pair of adjacent heater modules 3, a side surface portion 41 of one heater module 3 and a side surface of the other heater module 3. A discharge path 7 for discharging a liquid such as water condensed on the surface of the heater module 3 is formed between the section 42 and the section 42. Thus, the heater device 1 is completed.

According to the heater device 1, the heat generated from the tape-shaped heater 6 is given to the heat transfer plate 5 to heat the heat radiating member 4. Therefore, even if the heater device 1 is installed on the floor of a freezing warehouse, an ice layer does not occur on the surface of the heater module 3. Further, a discharge path 7 is formed in the heater device 1, and the heat radiation member 4 is formed in a shape that can guide the liquid on the surface to the discharge path 7. Even if the water condenses on the surface of the heater module 3, the water does not stay on the heater module 3. Therefore, the worker in the freezer warehouse can safely pass over the heater module 3 (the top surface section 40), and can carry out the work of carrying in / out the goods by the cart without any trouble.

Further, in this embodiment, since one tape-shaped heater 6 is routed through the plurality of heater modules 3, secondary processing such as wiring for power supply is unnecessary. Further, the heat transfer plate 5 and the tape-shaped heater 6
However, the heating efficiency of the surface of the heater module 3 can be increased because the heating module 3 is covered with the heat insulating material plate 2. In particular, when the heater device 1 is installed on the floor of a freezer warehouse, the heat insulating plate 2 thermally cuts off the floor having a large heat capacity from the tape-shaped heater 6, so that good heating efficiency can be obtained. realizable.

Further, by appropriately determining the length and arrangement of the heater modules 3, the heater device 1 can be formed into a unit having an appropriate size according to the intended use. Therefore, the heater device 1 can be arranged in various layouts, for example, by installing the heater device 1 only in a location that becomes a passage in the freezing warehouse. In addition, the layout of the heater device 1 can be easily changed even when the storage location of the frozen food or the like is changed. Further, when a failure occurs in the heater device 1, only the failed heater device 1 needs to be repaired, and maintenance is easy.

Although the embodiment has been described above, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the tape-shaped heater 6 is attached to the heat radiating member 4 via the heat transfer plate 5, but when the heat radiating member 4 has sufficient heat conductivity, the heat transfer plate 5 may be omitted and the tape-shaped heater 6 may be directly bonded to the heat radiating member 4.

Further, in the heater device 1 of the above-described embodiment, the heat transfer plate 5 and the tape-shaped heater 6 are covered with the heat insulating material plate 2, but as shown in FIG. The heater device 1 </ b> A may be configured such that the heat transfer plate 5 and the tape-shaped heater 6 are exposed from the upper surface of the heat insulating material plate 2 by being buried to the position of the lower surface of the heater 6.

Further, in the above-described embodiment, the heater module 3 is disposed on the heat insulating plate 2, but as shown in FIGS. 6, 7 and 8, a heat insulating material is provided inside each heater module 3A. 9 is fixed to a state in which it is straddled over a plurality of rod-shaped members 10 arranged so as to intersect the heater module 3A at a right angle, so as to form a so-called scoop-shaped heater device 1B. . With the heater device 1B, the same operation and effect as those of the heater device 1 of the above-described embodiment can be obtained.

In the heater device 1C shown in FIG.
One tape-shaped heater 6 is passed through one heater module 3 a plurality of times, and is routed to all the heater modules 3. Thereby, the output of the heater can be increased as compared with the above-described heater device 1. As shown in FIG. 10, one tape-shaped heater 6 is adhered to each of the heater modules 3 by using the same number of tape-shaped heaters 6 as the number of the heater modules 3, and the plurality of tape-shaped heaters 6 are attached. The heater device 1D may be configured by connecting the heaters 6 in parallel. At this time, the connection between each tape-shaped heater 6 and the lead wire 83 is covered with a material having electrical insulation. In the heater device 1D, by using the tape-shaped heaters 6 having different heat-generating temperatures, the heat-generating temperature can be changed for each heater module 3 and a temperature distribution can be obtained.

In the heater device 1E shown in FIG.
One tape-shaped heater 6 of the two tape-shaped heaters 6 connected in parallel is routed through two heater modules 3 of the four heater modules 3, and the remaining one is heated. Is passed through the remaining two heater modules 3. This allows
The heating temperature can be changed for each tape-shaped heater 6 and, since a smaller number of tape-shaped heaters 6 than the number of heater modules 3 are used, secondary processing for supplying power to the tape-shaped heater 6 is performed. Is easy.

As shown in FIG. 12, two tape-shaped heaters 6 may be routed through all the heater modules 3. In the heater device 1F configured as described above, it is possible to change the heating temperature in a plurality of stages by making the heating temperature of the on-tape heater 6 different. Further, even in this case, since the number of the tape-shaped heaters 6 to be used is smaller than the number of the heater modules 3, the secondary processing for supplying power to the tape-shaped heater 6 can be easily performed.

Further, as shown in FIG. 13, the heat radiating member 45 of the heater module 30 is
6. Side portions 47 and 48 extending from both longitudinal side edges of 6
And a side portion 47 of one heater module 30 of a pair of adjacent heater modules 30 is connected to a side portion 48 of the other heater module 30 to form a discharge path 70 having a V-shaped cross section. It may be formed. Also in this heater device 1G, the same operation and effects as those of the heater device 1A shown in FIG. 5 can be obtained.

In addition, various changes can be made within the scope described in the claims.

[0036]

According to the first aspect of the present invention, since the heat generated from the tape-shaped heater is applied to the heat radiating member, the formation of an ice layer on the surface of the heat radiating member can be prevented. Further, since the heat dissipating member has a shape capable of guiding the liquid on its surface to the discharge path, even if moisture in the atmosphere condenses on the surface of the heat dissipating member, this water does not stay. .

[0038] Opposite side surfaces of adjacent heat dissipating members.
A discharge path is formed between the
The condensed water passes through the discharge path between the side surfaces of the heat dissipating member.
Exhausted through. Therefore, for example, this heater device
When arranging in a passage in a freezer warehouse,
No ice layer is formed on the top of the
Water does not stay near the module. That
Therefore, workers in the freezer warehouse must safely pass over the top
Loading / unloading of goods using a trolley
Can be performed without any trouble. Further, cover the tape-shaped heater.
Heating efficiency is increased because heat insulation material is placed in
Can be. This is especially true for floors in frozen and refrigerated warehouses.
For example, when installing a cooling device,
Heat is cut off by thermally insulating the
Dramatically improve efficiency. Furthermore, since the heater device is configured by arranging a plurality of long heater modules in parallel, by appropriately determining the length and arrangement of the heater modules, the unit can be formed into an appropriate size according to the application. Thus, a simplified heater device can be configured. By unitizing the heater device, the heater device can be arranged in various layouts, the heater device can be arranged in various layouts, and the layout can be easily changed. In addition, maintenance is easy.

According to the second aspect of the present invention, the number of tape-shaped heaters to be used can be made smaller than the number of heater modules, so that secondary processing for power supply to the tape-shaped heater can be performed. Work is reduced. If Hikimawase a single tape-like heater through all heaters module, such that almost no need of secondary processing for the power supply.

[0039]

[Brief description of the drawings]

FIG. 1 is a sectional view of a heater device according to an embodiment of the present invention.

FIG. 2 is a plan view of the heater device shown in FIG.

FIG. 3 is a plan view showing an internal configuration of the tape-shaped heater with a part cut away.

FIG. 4 is a cross-sectional view of the tape-shaped heater as viewed from a section line AA in FIG. 3;

FIG. 5 is a cross-sectional view showing a second embodiment of the heater device.

FIG. 6 is a sectional view showing a third embodiment of the heater device.

FIG. 7 is a perspective view of the heater device shown in FIG.

8 is a plan view of the heater device shown in FIG.

FIG. 9 is a plan view showing a fourth embodiment of the heater device.

FIG. 10 is a plan view showing a fifth embodiment of the heater device.

FIG. 11 is a plan view showing a sixth embodiment of the heater device.

FIG. 12 is a plan view showing a seventh embodiment of the heater device.

FIG. 13 is a plan view showing an eighth embodiment of the heater device.

[Explanation of symbols]

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G Heater device 2 Heat insulating material plate 3, 3A Heater module 4 Heat radiating member 6 Tape heater 7, 70 Discharge path 9 Heat insulating material 60 PTC thermistor

Claims (2)

(57) [Claims] 1. A heat insulating material plate, and a plurality of heater modules arranged in parallel on one surface of the heat insulating material plate, wherein each heater module has a top surface portion and side surfaces falling from the top surface portion. The lower surface of the top surface is a heater mounting surface, and guides the liquid on the top surface to a discharge path.
A heat-dissipating member formed into a shape that can be formed, and a tape-like member formed on a heater mounting surface of the heat-dissipating member and formed into a tape shape by coating a positive temperature coefficient thermistor element mainly composed of barium titanate with an insulating material. A heater, wherein the heat insulating material plate is disposed on the heater mounting surface side of the heat radiating member so as to cover each of the tape-shaped heaters, and the plurality of heater modules are provided on one surface of the heat insulating material plate. Te, between each <br/> side portions facing each of the heat-release you adjacent member, the above discharge path for discharging the liquid flowing down from the upper surface of the top surface portion of the heat radiation member between respective said side portions A heater device that is arranged to be formed. 2. The heater device according to claim 1, wherein the tape heater is routed through at least two of the plurality of heater modules.