JP2003262425A - Heating/cooling strip and heating/cooling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating/cooling band usable for controlling the temperatures of tanks and piping in a variety of manufacturing plants as well as for preventing freezing of water pipes, and a heating/cooling apparatus using it. <P>SOLUTION: The heating/cooling band 1 comprises a flexible strip 4 with a plurality of Peltier elements 2 provided along the longitudinal direction of the strip 4, with their heating sides aligned with one side of the strip and their cooling sides aligned with the other side of the strip. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for winding around tanks, pipes, water pipes, etc. of various manufacturing plants, heating or cooling the pipes to a predetermined temperature, and preventing the water pipes from freezing. The present invention relates to a heating / cooling strip and a heating / cooling device such as a pipe using the same.

[0002]

2. Description of the Related Art Conventionally, as a water pipe freeze prevention device, the device disclosed in Japanese Utility Model Publication No. 7-29055 has been proposed. The device described in the publication includes a temperature switch 12 that is turned on / off in response to changes in the temperature of the water pipe and the surroundings, a power plug that integrally houses the temperature switch 12, and a heater element that is wound around the water pipe. The structure has an antifreezing band buried in a predetermined length and a connector for electrically connecting the lead wire terminal of the temperature switch and the lead wire terminal of the heater element.

Such a conventional device is turned on / off based on the temperature detected by a sensor installed at a place where the temperature is likely to be the lowest, such as on the north side of a house, in order to obtain a reliable antifreeze effect on the water pipe. It is designed to control. Therefore, for example, when the heater is installed in the water pipe facing the south side of the house, even when the outside temperature rises on the south side of the house and the water in the water pipe rises to a water temperature that does not need to consider freezing, If the temperature detected by the sensor is less than 0 ° C., the heater is turned on. For this reason, the heater may be turned on all day even for a portion that does not require heating. From this, the above-mentioned conventional device may not be able to intensively heat only a specific portion where the temperature of the water pipe is low, so that power may be consumed more than necessary, resulting in an increase in power consumption. have.

In order to solve the above-mentioned problems in the prior art, the applicant of the present invention invented a heater having a heater body which is wound around an object to be heated such as a water pipe using a positive temperature coefficient thermistor, and has already applied for a patent ( International patent application publication WO96
/ 08613). In this heater, a cord-shaped main body for heating an object to be heated is provided with electrical insulation and flexibility, and a heating element made of ceramics which is a positive temperature coefficient thermistor is arranged along the longitudinal direction of the main body. Then, a plurality of pairs of power supply wires, which are provided in the main body and for supplying electric power to each heating element, are provided in the main body, and a pair of conductive holding members,
Electrically connecting each power supply line to the heating element, and
It is configured to be provided on the main body so as to hold it.

In the above-mentioned heater using the positive temperature coefficient thermistor, since each heating element is provided on the main body along the length direction of the cord-shaped main body, each heating element made of hard ceramics is provided on the main body. However, it is possible to bend the flexible main body so as to conform to the curved surface serving as a water retention site such as a water pipe as a heated body. Further, each heating element is connected to a pair of power supply lines by a holding member having conductivity, and power is supplied from the power supply lines. From these facts, the Curie temperature of the heating element which is a positive temperature coefficient thermistor is set to, for example, 10 ° C to 80 ° C.
When the temperature is set to approximately, the resistance value of the heating element in the portion where the outside air temperature is lower than the normal temperature and the freezing point is low. At this time, when the heating element is energized, a large current flows through the heating element, the heating element generates heat, and the object to be heated can be quickly heated. From this, it is possible to prevent the freezing of water in the staying portion as the heated object by heating. In addition, the resistance value of the heating element in the portion raised to near the Curie temperature is increased, and the flowing current is reduced. Therefore, the power consumption of the heating element is suppressed. As a result, the heater using the PTC thermistor is
Since it is possible to appropriately heat only the portion to be heated of the object to be heated, it is possible to prevent freezing of the staying portion as the object to be heated and to suppress wasteful power consumption.

[0006]

The heater described above uses a positive temperature coefficient thermistor as a heating element and appropriately heats only a portion requiring heating to reduce power consumption. As a practically sufficient performance.
The inventors of the present invention have conducted intensive studies to achieve further energy saving in this heater using a positive temperature coefficient thermistor. As a result, in the heater using the positive temperature coefficient thermistor, when the heating element generates heat, the entire heating element is heated. Therefore, when the heater is wound around the heating object, the side of the heating element facing the heating object is heated. It was confirmed that although the energy is conducted to the object to be heated, thermal energy escapes to the atmosphere from the opposite side which is not in contact with the object to be heated, and there is an energy loss corresponding to this.
Further, since the above heater is configured to control the temperature by utilizing the positive characteristics of the heating element, it is suitable as a heater for preventing freezing of a water pipe as described above, but as another heating heater, particularly, a heater to be heated. It cannot be applied to temperature control means such as tanks and pipes in a chemical product manufacturing plant where it is desired to heat and cool the body, and there is a drawback that the applicable range is narrow.
That is, the tanks and pipes of a chemical product manufacturing plant involving reactions such as oxidation, reduction, polymerization, and condensation require heating to a predetermined temperature in one process and cooling in another process, so that the temperature cannot be switched. Often required, rapid temperature switching may be required to reduce manufacturing time. Further, since the heater is configured to control the temperature by controlling the positive characteristic of the heating element, precise temperature control is difficult, and in the field related to biotechnology such as genetic engineering and fermentation engineering, extremely precise temperature control is desired. It is insufficient as a heater for heating.

The present invention has been made in view of the above circumstances, and a heating / cooling strip and a heating / cooling using the same that can be used not only for preventing the freezing of water pipes but also for controlling the temperature of tanks and pipes of various manufacturing plants. The purpose is to provide the device.

[0008]

In order to achieve the above-mentioned object, the present invention provides a plurality of Peltier elements along the longitudinal direction of a flexible strip, each heating side of which has one of the strips. The heating and cooling strip is provided on the surface side of the strip with its cooling side aligned with the other surface of the strip. The heating / cooling strip of the present invention heats or cools the heating target based on the flow direction of the current by supplying power to a plurality of Peltier elements in a state where the strip is wound around the heating target such as a pipe. it can. When a current is passed through the Peltier element, one side of the Peltier element is heated and the other side is cooled.Therefore, when heating the cooled object with this heating / cooling strip, heat is applied from the opposite side of the heating side. Energy does not escape and heating efficiency is high. Further, heating and cooling can be performed by changing the flow direction of the current applied to the Peltier element while being wound around the object to be heated.

In the heating / cooling strip of the present invention, the Peltier element has a structure in which a semiconductor element is sandwiched between a pair of insulating substrates, and an electrode connected to the semiconductor element is provided on the outer surface side of the insulating substrate. , Or a structure in which it is formed so as to project from the inner surface side is preferable. The strip-shaped body is made of synthetic resin and covers a heating / cooling unit having a power supply line provided along the longitudinal direction thereof and the Peltier elements provided at predetermined intervals along the longitudinal direction of the power supply line. It may be a flexible long strip. Furthermore, a heating and cooling unit having a power supply line and the Peltier element provided at predetermined intervals along the longitudinal direction of the power supply line, and a strip-shaped body composed of an insulating coating for covering at least a conductive portion of the heating and cooling unit. It may be configured to include. Further, a heating / cooling unit having a power supply line and the Peltier element provided at predetermined intervals along the longitudinal direction of the power supply line, and a strip-shaped body made of an insulating coating covering at least a conductive portion of the heating / cooling unit. It may be configured to have at least a metal coating in contact with the heating side and the cooling side of the Peltier element. In the heating / cooling strip of the present invention, the Peltier element is electrically connected to the power supply line by a stopper that sandwiches the end of the Peltier element and the power supply line, by spot welding, or by soldering. A mechanically joined structure is preferred. Furthermore, the heating / cooling strip according to the present invention may have a configuration having a temperature sensor.

Further, the present invention compares the heating / cooling strip and the temperature measurement data sent from the temperature sensor with a set temperature,
Provided is a heating / cooling device including a power supply device that stops power supply to the heating / cooling strip or changes the direction of a current flowing through the heating / cooling strip so that the temperature detection data matches the set temperature. To do. In the heating / cooling device of the present invention, the power supply device may have a function of changing the direction of current supplied to the heating / cooling strip and the presence / absence of power supply to the heating / cooling strip according to a preset temperature program. .

[0011]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 is a view showing a first embodiment of a heating / cooling strip according to the present invention, and FIG. 2 is a sectional view taken along the line II in FIG. This heating / cooling strip 1 has two power supply lines 3
The heating / cooling unit 10 having a long ladder-like structure in which chip-like Peltier elements 2 are attached at predetermined intervals along the longitudinal direction of the structure is enclosed in a long strip 4 made of synthetic resin. There is. Each Peltier element 2 is electrically and mechanically connected to each feed line 3 by using a stopper 5.

The Peltier element 2 has a structure in which a semiconductor element is sandwiched between a pair of insulating substrates, and an electrode connected to the semiconductor element is provided on the outer surface side of the insulating substrate or on the inner surface side. It is preferable that the structure is formed so as to project from. The Peltier device 2 used in the present embodiment has a pair of electrodes provided on either end of the insulating substrate.
Regarding the structure of the Peltier device 2 suitable for the present invention, FIG.
3 and FIG. 17, a detailed description will be given later.

The arrangement interval (pitch) of the Peltier elements 2 is
Characteristics of Peltier element 2 used and heating / cooling strip 1
Can be appropriately selected according to the usage state of, for example, 3 for the purpose of wrapping around the water pipe to prevent the water pipe from freezing.
It is preferable to attach the Peltier elements 2 at intervals of 10 cm. Further, for the purpose of being wound around a tank of a manufacturing plant and used, it is preferable to attach the Peltier elements 2 at intervals of 1 to 20 cm. For the purpose of wrapping around the piping of the manufacturing plant, the Peltier device 2 should be placed at intervals of 1 to 20 cm.
Is preferably attached.

One end of a stopper 5 made of a highly conductive metal such as copper or a copper alloy is connected to the portion where the electrode 7 of the Peltier element 2 is formed, and the other side of these stoppers 5 is connected to the feeder line 3. It is connected to the. In this example, the stopper 5
Two pairs of Peltier element gripping pieces 33 for sandwiching the Peltier element 2 are provided on one side, and a pair of feeding line gripping pieces 34 for sandwiching the feeding line 3 are provided on the other side. .
Then, the Peltier element 2 is inserted between the pair of Peltier element gripping pieces 33 of the stopper 5, the pair of gripping pieces are sandwiched, and the power feeding line 3 is inserted between the pair of power feeding wire gripping pieces 34,
By sandwiching the pair of gripping pieces, the Peltier element 2 can be electrically and mechanically connected to the power supply line 3. The means for connecting the Peltier element 2 and the power supply line 3 is not limited to the use of the stopper 5, and a joining means such as soldering or spot welding can be used.

The power supply line 3 is not particularly limited, and various power supply lines can be used, and it is preferable that the heating and cooling strip 1 can be wound smoothly. For example, many thin conductors are twisted. A power supply line or the like is preferably used. A cord 6 on the output side from a power supply device that applies a current to the power supply line 3 is connected to one end of the power supply line 3.

The strip 4 enclosing the heating / cooling unit 10 is, for example, a soft vinyl chloride resin, a polyolefin resin such as polyethylene or polypropylene, a thermoplastic polyester resin such as polyethylene terephthalate, a polyacrylate or polymethacrylate resin. Resin, cellulose ester resin such as triacetyl cellulose, ethylene-vinyl acetate copolymer resin, polycarbonate resin, polyamide resin, polyimide resin, polyether sulfone resin, polysulfone resin, polyphenylene sulfide resin, polyether Various thermoplastic resins such as imide resins and polyether ether ketone resins; or thermosetting resins such as silicone resins, phenol resins, polyurethane resins; From the viewpoint of flexibility is obtained, a soft vinyl chloride resin, it is preferable to use a silicone resin. When the thermoplastic resin is used for the strip 4, the heating / cooling unit 10 can be enclosed in the strip 4 by using a molding method such as an extrusion molding method. When a thermosetting resin is used for the belt-shaped body 4, the belt-shaped body 4 can be formed by a coating method or the like, and by using a heat-vulcanizable silicone rubber as the silicone resin, the belt-shaped body 4 can be formed by an extrusion molding method.
Can be produced. It is also possible to use an ultraviolet (UV) curable resin.

The thickness of the strip 4 is so flexible that it can be wound into a housing means such as a winding drum in the state where the heating / cooling unit 10 is enclosed to form the heating / cooling strip 1. At the same time, it may be appropriately set in consideration of mechanical properties of the synthetic resin material to be used so as to obtain sufficient liquid-tightness so that water or the like does not enter inside. Also, the strip 4
If necessary, a hard coat layer made of a hard transparent resin, a waterproof layer made of a water-repellent resin, etc. may be laminated on the surface.

The length of the heating / cooling strip 1 is several meters or more.
The length can be freely set up to several hundred meters or more, but a standard length in the range of 10 to 100 meters (for example, 10 meters or 2
It is made in units of 0 meters. Alternatively, a short heating / cooling strip 1 having a length of several meters or less may be produced and a large number of heating / cooling strips 1 may be sequentially connected and used.
Further, regardless of the length of the heating / cooling strips 1, a connector for sequentially connecting the plurality of heating / cooling strips 1 may be provided on at least one end side of each heating / cooling strip 1.

In this heating / cooling strip 1, a plurality of Peltier elements 2 are arranged along the longitudinal direction of a flexible strip 4.
Each heating side is aligned with one surface side of the strip 4 and each cooling side is aligned with the other surface side of the strip 4. By supplying power to the plurality of Peltier elements 2 in a state of being wrapped around the heating / cooling body, the heating target cooling body can be heated or cooled based on the flow direction of the current. When an electric current is applied to the Peltier element 2, one side of the Peltier element 2 is heated and the other side is cooled. Therefore, when heating the object to be heated by the heating / cooling strip 1, The heat energy does not escape from the opposite side, and the heating efficiency is high. Further, heating and cooling can be performed by changing the flow direction of the current applied to the Peltier element 2 while being wound around the object to be heated.

Next, an example of a method for manufacturing the heating / cooling strip 1 will be described. First, a method of manufacturing the stopper 5 will be described. As shown in FIG. 3 (a), punching by a metal plate is performed on each long piece of the rectangular bottom portion 32 having a slit groove. As shown in FIG. 3B, the bottom surface portion 32, the Peltier element gripping piece 33, and the power supply line are formed by a simple process of sequentially bending the flat plate material 31 formed so as to be bilaterally symmetrical along the bending line Lv. It is formed in a shape having a gripping piece 34. In addition, as the material of the stopper 5, a metal plate such as copper, copper alloy, and silver-plated copper, which has conductivity and flexibility that can be bent flexibly, is suitable.

Subsequently, the heating / cooling unit 10 is manufactured by using the stopper 5. First, as shown in FIG. 4, the portion of the Peltier element 2 on which the electrode 7 is formed is removed from both end faces in the thickness direction of the Peltier element 2 so that each Peltier element gripping piece 33 contacts each electrode 7. The Peltier element gripping pieces 33 sandwiching and sandwiching the Peltier element 2 are pressed and clamped in a direction in which they approach each other, and the stopper 5 is attached to the Peltier element 2 as shown in FIG. At this time, cream solder or the like may be applied in advance on the inner surfaces of the respective Peltier element gripping pieces 33 facing each other, if necessary.

After that, as shown in FIG. 6, after the power feed line 3 is passed through the power feed line gripping piece 34, which is a piece protruding outward of the Peltier element 2, in a direction in which the power feed line gripping pieces 34 are brought closer to each other. By caulking, as shown in FIG. 7, the power supply line gripping pieces 34 are arranged along the circumferential direction of the power supply line 3, and the power supply line gripping pieces 34 sandwich and sandwich the power supply line 3, respectively. At this time, if necessary, the power supply line gripping piece 34
May be spot-welded to the power supply line 3.

In this way, the power supply lines 3 are respectively passed through the power supply line gripping pieces 34 of the stopper 5, and the power supply line gripping pieces 34 are sandwiched and fixed to the power supply line 3 respectively. Thus, as shown in FIG. 8, a long heating / cooling unit 10 in which the Peltier elements 2 are sandwiched between the power supply lines 3 at predetermined intervals via the stoppers 5 is manufactured.
As shown in FIG. 9, the heating / cooling unit 10 is wound around the winding drum 11 in a roll shape.

The heating / cooling unit 10 as described above can be covered with the strip 4 made of synthetic resin to form the long heating / cooling strip 1 by using, for example, a method of extrusion molding a thermoplastic resin. First, as shown in FIG. 10, a thermoplastic resin 4 ′ having electrical insulation and flexibility such as vinyl chloride resin is extruded from the crosshead 13 of the extruder 12 at a predetermined pressure to form a belt-shaped resin molded body. When manufactured by extrusion molding, the heating / cooling unit 10 is sequentially sandwiched between the extruded thermoplastic resins 4 ', so that the heating / cooling unit 1 is provided along the length direction of the resin molded body.
0 is enclosed in a resin molded body.

At this time, the thermoplastic resin 4'is extruded between the die 13a and the nipple 13b of the crosshead 13, while the heating / cooling unit 10 passes through the nipple 13b, whereby the thermoplastic resin 4'is extruded. 4 '
Are extruded toward the heating / cooling unit 10 so as to face both end faces in the thickness direction of each Peltier element 2.

At this time, the heating / cooling unit 10 in the nipple 13b is sucked through the through hole 13c through which the thermoplastic resin 4'is extruded in a tubular shape from between the die 13a and the nipple 13b. Nipple 13b
The space surrounded by the tip of is in a decompressed state. As a result, the thermoplastic resin 4 ′ quickly comes into close contact with the heating / cooling unit 10 and is integrated with each other.

After the thermoplastic resin 4'is extruded so as to cover the heating / cooling unit 10 in this manner, it is water-cooled in the water-cooling tank 14 as shown in FIG. A heating / cooling strip 1 having a structure in which is covered with a strip 4 made of a transparent synthetic resin is formed. The obtained heating and cooling strip 1 is wound around the winding drum 15 in a roll shape.

As described above, according to the above-described method, the heating / cooling unit 10 can be easily manufactured automatically, and the heating / cooling unit 10 is continuously extruded from the thermoplastic resin in the strip 4 made of the transparent synthetic resin. The long heating / cooling strip 1 can be easily manufactured by encapsulating the same. Moreover, the heating / cooling unit 10 and the obtained heating / cooling strip 1
Since it can be wound into a roll shape, when a heating / cooling strip 1 in which the heating / cooling unit 10 having no particular length limitation is enclosed in a strip 4 is produced, as in the case of using compression molding, Since it is not necessary to use a mold corresponding to the length of the heating / cooling strip 1, space can be saved. As a result, according to the above method, it becomes easy to produce the long heating / cooling strip 1. Further, in the above method, the Peltier element 2 and the respective Peltier element gripping pieces 33 of the respective stoppers 5 are clamped, and the respective feeder wire gripping pieces 34 and the respective feeder lines 3 of the respective stoppers 5 are held.
The Peltier element 2 is connected to each power supply line 3 by sandwiching the Peltier element 2 with each other, and each Peltier element gripping piece 33 is attached to the Peltier element 2 by contraction of the thermoplastic resin expanded by heating during extrusion molding due to cooling. The heating / cooling unit 10 is enclosed in the strip-shaped body 4 while the power supply line gripping pieces 34 are pressed against the power supply lines 3. From this, in the above method, the connection between the Peltier element 2 and each Peltier element gripping piece 33 of each stopper 5 and each power supply line gripping piece 34 of each stopper 5 and each power supply line is heated and cooled. Even when the strip 1 is bent, it can be maintained in the heating / cooling strip 1 by the contracting force of the thermoplastic resin when it is cooled, so that the step of joining by solder for connecting the Peltier element 2 and the power supply line 3 can be omitted. You can Further, in the above method, the Peltier element 2 is fitted between the Peltier element gripping pieces 33 of the stopper 5, and the power supply line 3 is connected to the power supply line gripping piece 3 of the stopper 5.
After fitting between the four, the Peltier element 2 can be connected to each power supply line 3 via each stopper 5 to manufacture the heating / cooling unit 10 by caulking them. As a result, in the above method, it is possible to use a process that is easy to automate, such as fitting or caulking.
Since the soldering step can be omitted as described above, the production of the long heating / cooling unit 10 in which a large number of Peltier elements 2 are connected to the respective power supply lines 3 can be easily automated.
Moreover, the heating / cooling unit 10 which can be manufactured by such labor saving by automation is continuously sealed in a strip 4 made of a transparent thermoplastic resin by extrusion molding of a thermoplastic resin to form the heating / cooling strip 1. Therefore, it becomes easy to manufacture the heating / cooling strip 1 in which the heating / cooling unit 10 is enclosed, without particularly limiting the length. For these reasons, in the above method, continuous production of the long heating / cooling strip 1 can be automated and simplified, so that the manufacturing cost of the heating / cooling strip 1 can be reduced.

Note that, as shown in FIG. 11, if necessary, the power feeding line gripping portion 34 and the power feeding wire 3 are fixed by the solder 16, and the Peltier element gripping piece 33, the bottom surface portion 32 and the Peltier element 2 are fixed. The part that contacts the electrode 7 may be adhered using a conductive adhesive tape or adhesive,
Alternatively, it may be fixed by soldering.
In this way, the Peltier element 2 and the power feed line 3 are joined by the fastener 5, and the power feed line 3 and the fastener 5 are fixed by the solder 16, so that the connection strength between the power feed line 3 and the Peltier element 2 is further increased. Can be improved.

Further, the shape of the stopper 5 is not limited to the example shown in FIG. 3, and other various shapes and structures of stoppers may be adopted as long as the Peltier element 2 and the power supply line can be connected.
In addition, the Peltier element 2 is provided with a gripping piece as a stopper,
It is also possible to provide a structure in which this gripping piece is sandwiched and connected to the power supply line, or a projection piece is provided on the Peltier element 2, and the power supply line 3 is spot-welded or soldered to this projection piece.

FIG. 12 shows a long heating / cooling unit 10.
Another example is shown in which the heating and cooling strip 1 is manufactured by covering the above with a strip 4 made of a synthetic resin. In the method for producing the heating / cooling strip 1 described above, as shown in FIGS. 9 and 10, an extrusion molding method is used, and the heating / cooling unit 1 is covered with a transparent synthetic resin around the periphery thereof.
The heating and cooling strip 1 was manufactured by enclosing 0 in the strip 4, but the heating and cooling unit 10 was sandwiched between two (or more) synthetic resin sheets 41 as shown in FIG. 12, for example. In this state, the heating / cooling strip 1 in which the heating / cooling unit 10 is enclosed in the strip 4 may be manufactured by passing the synthetic resin sheet 41 through the heating roll 42 and thermocompression bonding.

Since the long heating / cooling strip 1 thus produced can be wound around the winding roll 43, the long heating / cooling strip 1 can be wound in the same manner as the extrusion molding method described above. In addition, the synthetic resin sheet 41 is simply heat-pressed, and the manufacturing process can be simplified as compared with the case where an extruder is used.

As an application example of the above method, instead of the heating / cooling unit 10, an extrusion molding method is used to form the strip-shaped member 4.
It is also possible to use the heating / cooling strip 1 coated with and to laminate different types (or the same type) of synthetic resin layers on the strip 4 of the heating / cooling strip 1. In this case, as the synthetic resin to be laminated on the strip 4 of the heating / cooling strip 1, for example, polyvinyl chloride resin, polyolefin resin such as polypropylene, acrylic acid ester and methacrylic acid ester resin, cellulose such as nitrocellulose. Resins, polystyrene resins, thermoplastic polyester resins such as polyethylene terephthalate (PET), polycarbonate resins, polyamide resins,
Polyimide resin, polyether sulfone resin, polysulfone resin, polyphenylene sulfide resin,
Various resins such as polyetherimide-based resin and polyetheretherketone-based resin can be mentioned. However, when the heating / cooling strip 1 is wound and used, it has sufficient flexibility, and at the heating and cooling temperatures. Considering the fact that the mechanical strength does not change, it is preferable to select and use an appropriate synthetic resin material.

FIG. 13 exemplifies a Peltier element suitable for the heating / cooling strip of the present invention, and FIG. 13 (a) is a rear perspective view showing the internal structure of the Peltier element 2.
(B) is a perspective view of the same Peltier element 2 on which the electrode 7 is formed, and (c) is a sectional view. This Peltier element 2 is
A large number of semiconductor elements 5 are provided between the two ceramic substrates 51.
It has a sandwich structure in which two are arranged side by side. The semiconductor element 52 is configured by alternately arranging small pieces of a p-type semiconductor (p in the figure) and an n-type semiconductor (n in the figure). The p-type semiconductor and the n-type semiconductor are connected by a thin plate-shaped conductor 53 such as copper or silver so that p → n → p → n →. The electrodes 7 are connected to the first and last elements of the semiconductor element 52 array. The electrode 7
Is composed of a conductor obtained by applying a silver paste and firing it. As shown in FIG. 7C, one end of the conductor is in contact with the semiconductor element and it is extended to the outside of the ceramic substrate 51. As described above, the ceramic substrate 51 is formed to extend to one end portion of the outer surface. Note that, in FIG. 13C, the conductor 53 that connects the semiconductor elements to each other is not shown in order to simplify the illustration.

This Peltier element 2 has electrodes 7
By applying a direct current between them, one ceramic substrate 51 side is heated and the other ceramic substrate 51 side is cooled. Further, by changing the direction of the current applied between the electrodes 7, the one ceramic substrate 51 that has been heated is cooled, and the other ceramic substrate 51 that has been cooled is turned to heating. This Peltier element 2 is
Since the electrode 7 connected to the array of the semiconductor elements 52 is extended to the outer surface side of the ceramic substrate 51 and can be easily connected to the power supply line 3 by the stopper 5, the heating / cooling unit 10 and the heating / cooling strip 1 are formed. Manufacturing is easy.

The shape of the Peltier element 2 is not limited to a quadrangular plate shape, and its shape in plan view is, for example, a shape with notched corners, a shape with rounded corners, a circle, an ellipse, an oval, It can be a polygon with five or more sides. Further, in order to increase the heating / cooling temperature difference of the Peltier element 2, a structure in which two or more Peltier elements are laminated may be adopted.

FIG. 14 is a schematic configuration diagram showing a first example of the heating / cooling device according to the present invention. This heating and cooling device
A heating / cooling strip 1 wound around a heated object to be heated such as a water pipe or a tank of a manufacturing plant or a pipe, and a power supply device 61 for applying a current to the heating / cooling strip 1 via a cord 6. It is configured. Temperature detection data 62 from a temperature sensor (not shown) provided on any of the objects to be heated is input to the power supply device 61. The power supply device 61 supplies voltage and current suitable for driving the plurality of Peltier elements 2 provided in the heating / cooling strip 1 to the power supply line 3 of the heating / cooling strip 1 via the cord 6 in the ON state. At the same time, when the temperature measurement data 62 exceeds a preset temperature range (upper limit temperature during heating, lower limit temperature during cooling), the current can be cut off or the direction (polarity) of the current can be changed.

Further, it is desirable that the power supply device 61 has a function of changing the direction of current supplied to the heating / cooling strip 1 and the presence / absence of power supply to the heating / cooling strip 1 according to a preset temperature program. With such a function, it is possible to automatically control the start and end of heating or cooling, and automatically change and maintain the temperature when shifting from one manufacturing process to the next.

FIG. 15 is a schematic configuration diagram showing a second example of the heating / cooling device according to the present invention. This heating and cooling device
Comprising substantially similar components to the device according to the first example,
In addition to this, the heating and cooling strip 1 in which at least one temperature sensor 63 is arranged between the Peltier elements 2 is used, and the temperature detection data 62 from these temperature sensors 63 is input to the power supply device 61.

As the temperature sensor 63, conventionally known various types of temperature sensors can be used, and it is preferable that the temperature sensor is small and capable of detecting temperature within the operating temperature range of the heating / cooling device. The temperature measurement data from the temperature sensor 63 is sent to the power supply device 61 via a cord or the like arranged inside or outside the heating / cooling strip 1. The second example of the heating / cooling device uses the heating / cooling strip 1 in which at least one temperature sensor 63 is arranged between the Peltier elements 2, so that a plurality of positions along the longitudinal direction of the heating / cooling strip 1 can be obtained. Temperature measurement data 62
Can be obtained, the heating / cooling state by the heating / cooling strip 1 can be more clearly grasped, and accurate temperature control can be executed.

FIG. 16 shows a second heating / cooling strip according to the present invention.
It is a figure which shows the embodiment of. This heating / cooling strip 70
Is a Peltier element 7 provided with a pair of feed line gripping pieces 71 made of a conductive metal plate such as a copper plate sandwiching the feed line 3.
3, the power supply line 3 electrically and mechanically connected to the power supply line gripping piece 71, and at least a conducting portion, that is, the power supply line 3
And an insulating coating 72 made of synthetic resin for coating the Peltier element 73 on the side of the feeder wire gripping piece 71.

The feed line gripping piece 71 provided on the Peltier element 73 only needs to be capable of sandwiching the power feed line 3, and as shown in the figure, a pair of gripping pieces may be formed so as to project from the Peltier element 73 on both sides. The lead wire 74 drawn out from the Peltier element 73 may be sandwiched on one side and the feed line 3 may be sandwiched on the other side, and the shape and the number thereof are not limited. FIG. 17 exemplifies a Peltier element 73 having a lead wire 74 for connection.
3 has a structure in which a plurality of semiconductor elements 52 including p-type semiconductors and n-type semiconductors are arranged side by side between two ceramic substrates 51 and electrically connected to each other.
The lead wire 74 connected to 1 is drawn out.

An insulating coating 72 is provided on the heating / cooling unit in which the Peltier element 73 is attached at a predetermined interval of the feeder line 3.
To provide, use the extruder shown in FIGS.
Similar to the manufacturing of the heating / cooling strip 1 of the first embodiment described above, the synthetic resin can be extruded. The heating / cooling strip 70 according to the second embodiment is characterized in that both the ceramic substrates 51 of the Peltier elements 73 are exposed, and if the feed line 3 is covered between the adjacent Peltier elements 73. The insulating resin 72 may be omitted (that is, it may have a perforated shape), or the whole may be formed into a band-shaped body having no holes and only the ceramic substrate 51 may be exposed.

According to the second embodiment of the heating / cooling strip, by exposing the ceramic substrate 51 of the Peltier element 73 from the insulating coating 72, the ceramic substrate 51 directly contacts the object to be heated and heat Since energy can be exchanged, power consumption can be further reduced, and switching to heating or cooling can be performed instantaneously, and temperature control can be more accurate.

FIG. 18 shows a third heating / cooling strip according to the present invention.
It is a figure which shows the embodiment of. This heating and cooling strip 75
Is the heating / cooling strip 70 according to the above-described second embodiment.
The configuration is similar to that of the above, and a metal coating layer 76 is bonded to the outer surface side of both ceramic substrates 51 of the Peltier element 73.

As the metal coating layer 76, it is preferable to use a metal plate having a good thermal conductivity, such as a copper plate or an aluminum plate. The metal coating layer 76 may be attached to the ceramic substrate 51 of each Peltier element 73, or a long metal strip may be attached to both sides of the heating / cooling strip 75. To bond the metal coating layer 76 to the ceramic substrate 51 of the Peltier element 73, a method using a metal-based bonding agent such as silver solder or solder paste, a method using a synthetic resin-based adhesive, a mechanical fastening means such as bolt fastening, etc. And the like can be used.

According to the third embodiment of the heating / cooling strip, by exposing the ceramic substrate 51 of the Peltier element 73 from the insulating coating 72 and joining the metal coating layer 76, the metal coating layer 76 is formed. Since the heat energy can be exchanged by directly contacting the object to be heated, the power consumption can be further reduced, and the switching to heating or cooling can be performed instantly, and the temperature control can be performed more accurately. become. In addition, the metal cover layer 76 protects the ceramic substrate 51, making it less likely to be damaged.

[0048]

According to the heating / cooling strip of the present invention, a plurality of Peltier elements are provided along the longitudinal direction of the flexible strip.
Each heating side is arranged on one surface side of the band-shaped body, and each cooling side is arranged on the other surface side of the band-shaped body. By supplying power to multiple Peltier devices while being wound around
The object to be heated can be heated or cooled based on the direction of current flow. When a current is passed through the Peltier element, one side of the Peltier element is heated and the other side is cooled.Therefore, when heating the cooled object with this heating / cooling strip, heat is applied from the opposite side of the heating side. Energy does not escape and heating efficiency is high. Further, heating and cooling can be performed by changing the flow direction of the current applied to the Peltier element 2 while being wound around the object to be heated.
Therefore, according to the present invention, it is possible to provide a heating / cooling strip and a heating / cooling device using the same, which can be used not only for preventing the freezing of water pipes but also for controlling the temperature of tanks and pipes of various manufacturing plants.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a heating / cooling strip according to the present invention.

FIG. 2 is a sectional view taken along the line II of FIG.

3A and 3B show a manufacturing process of a stopper, FIG. 3A is a plan view of a plate material before bending, and FIG. 3B is a perspective view of the stopper after bending.

FIG. 4 is a perspective view showing a state in which one side of a stopper is inserted into a Peltier element.

FIG. 5 is a perspective view showing a state in which a stopper is connected to a Peltier element.

FIG. 6 is a perspective view showing a state in which a power supply line is inserted into the other side of the stopper.

FIG. 7 is a perspective view showing a state in which a Peltier element is attached to a power supply line via a stopper.

FIG. 8 is a perspective view of a heating / cooling unit.

FIG. 9 is a schematic side view illustrating an extruder for extruding a resin into a heating / cooling unit to produce a heating / cooling strip.

FIG. 10 is a cross-sectional view of a main part of an extrusion molding machine.

FIG. 11 is a perspective view showing another configuration example of the heating / cooling unit.

FIG. 12 is a perspective view of an essential part illustrating another molding machine for resin coating.

FIG. 13 is a diagram illustrating a Peltier element suitable for the heating / cooling strip of the present invention, where (a) is a rear perspective view of the Peltier element, (b) is an electrode side perspective view, and (c) is a main part. It is a side view.

FIG. 14 is a schematic configuration diagram showing a first example of a heating / cooling device of the present invention.

FIG. 15 is a schematic configuration diagram showing a second example of the heating / cooling device of the present invention.

FIG. 16 is a sectional view showing a second embodiment of a heating / cooling strip according to the present invention.

FIG. 17 is a perspective view showing another example of a Peltier device suitable for the heating / cooling strip according to the present invention.

FIG. 18 is a sectional view showing a third embodiment of a heating / cooling strip according to the present invention.

[Explanation of symbols]

1,70,75 Heating / cooling strip 2,73 Peltier element 3 power lines 4 band 5 stop 7 electrodes 10 Heating / cooling unit 51 Ceramic substrate (insulating substrate) 52 Semiconductor element 61 power supply 62 Temperature measurement data 63 Temperature sensor 72 Insulation coating 76 Metal coating layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16L 53/00 F16L 53/00 C H01L 35/32 H01L 35/32 Z 35/34 35/34

Claims (9)

[Claims] 1. A plurality of Peltier elements are provided along a longitudinal direction of a flexible strip, each heating side being one surface side of the strip, and each cooling side being the other side of the strip. A heating / cooling belt-shaped body, which is provided in line with the surface side. 2. The Peltier element has a structure in which a semiconductor element is sandwiched between a pair of insulating substrates, and an electrode connected to the semiconductor element is provided on an outer surface side of the insulating substrate or protrudes from an inner surface side. The heating and cooling strip according to claim 1, which is formed. 3. The band-shaped body covers a heating / cooling unit having a power supply line provided along the longitudinal direction thereof and the Peltier element provided at predetermined intervals along the longitudinal direction of the power supply line. The heating and cooling strip according to claim 1 or 2, which is a flexible long strip made of synthetic resin. 4. A heating / cooling unit having a power supply line and the Peltier element provided at predetermined intervals along a longitudinal direction of the power supply line, and an insulating coating for covering at least a conductive portion of the heating / cooling unit. Claim 1 containing a strip.
Alternatively, the heating / cooling strip according to 2. 5. A heating / cooling unit having a power supply line and the Peltier element provided at predetermined intervals along a longitudinal direction of the power supply line, and an insulating coating for covering at least a conductive portion of the heating / cooling unit. The heating / cooling strip according to claim 1 or 2, further comprising a strip and a metal coating that is in contact with at least a heating side and a cooling side of the Peltier element. 6. The Peltier element is electrically and mechanically joined to the power supply line by a stopper that clamps the end of the Peltier element and the power supply line, by spot welding, or by soldering. The heating / cooling strip according to any one of claims 1 to 5. 7. The heating / cooling strip according to claim 1, further comprising a temperature sensor. 8. The heating / cooling strip according to any one of claims 1 to 7 and temperature measurement data sent from a temperature sensor are compared with a set temperature, and the temperature measurement data matches the set temperature. A heating / cooling device, comprising: a power supply device for stopping power supply to the heating / cooling strip or for changing the direction of a current flowing through the heating / cooling strip. 9. The power supply device according to claim 8, wherein the power supply device has a function of changing the presence or absence of power supply to the heating / cooling strip and the direction of a current flowing through the heating / cooling strip according to a preset temperature program. Heating and cooling device.