JP2002031265A - Heating part mainly used for thermal valve - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable molding of a heat generating portion composed of a heat generating element and an electrode assembled thereto with a resin material, thereby making the heat generating element
The heat-generating part, which is a current-carrying part such as an electrode or a terminal, can be completely hermetically sealed, and temperature unevenness is reduced to a level that does not cause a problem. To provide. A pair of electrodes are provided on one surface of a heating element opposite to a surface which is brought into contact with a heat-responsive element, and a pair of electrodes are provided. The other side of the body that is brought into contact with the thermoresponsive element has no electrodes / terminals and an electrode plate, and is made of an insulating material such as a resin except for the ends that are the electrical connection portions of the pair of terminals. And then sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat valve mainly used for controlling a heating medium / refrigerant in a heating device, a cooling device, a hot water supply device and the like.

[0002]

2. Description of the Related Art As shown in FIGS. 1 and 2, a conventional thermal valve comprises a thermal valve V, a valve portion A having a body 1 in which a valve body (valve) 2 is incorporated, and a valve portion thereof. A heat responsive element 3 such as a wax thermoelement for driving the body 2 is divided into a drive section B for assembling and holding the holding member 4, and the valve section A is provided inside the body 1 and the body 1.
A valve chamber 13 communicating with a fluid inlet 10 and a fluid outlet 11 provided on the outer periphery of the
The valve body 2 for opening and closing the communication between the fluid inlet 10 and the fluid outlet 11 is inserted therein, and the outer end side of the valve shaft 20 connected to the valve body 2 is formed on the upper surface side of the body 1. The thermo-sensitive element 3 is activated by heating the thermo-sensitive part 30 on the outer end surface of the thermo-sensitive part 30 of the thermo-sensitive element 3 held by the holding member 4 in the driving part B. A heating element 5 such as a positive temperature coefficient thermistor (PTC) that generates heat by energization is sandwiched in a sandwich shape by contacting electrode plates 6 and 6 made of a metal plate on both upper and lower surfaces of the heating element 5. The holding member 4 is closed and assembled with the holding member 4 by the holding lid 40. The holding member 4 has the above-described valve portion A at the bottom portion where the operating rod 31 into and out of which the thermally responsive element 3 held by the holder faces. Mounting seat 14 formed on the upper surface side of the body 1 The corresponding assembly seat 41 is provided, also,
A ventilation port 42 is provided around the temperature sensing portion 30 of the thermoresponsive element 3 to improve the heat radiation of the temperature sensing portion 30.
Is assembled to the valve section A, as shown in FIG.
There is an embodiment in which the valve element 2 is opened by energizing the lead wires 61 connected to the zero and causing the heating element 5 to generate heat.

[0003] Further, in a thermal valve V in which a valve section A and a drive section B are separately configured and connected to assemble them,
When the heating element 5 is brought into contact with the temperature sensing section 30 of the thermoresponsive element 3 held by the holding member 4 of the drive section B and assembled, the portion of the holding member 4 that houses the heating element 5 is replaced with the temperature sensing section 30. The heating element 5 is sealed with a sealing film a provided between the heating element 5 and a pair of electrode plates 6 and 6 respectively contacting the heating element 5 on both upper and lower surfaces so as to sandwich the heating element 5 in a sandwich shape. Then, terminals 60, 60 are provided on the electrode plates 6, 6, lead wires 61, 61 are connected thereto, and their outlets are
A means for sealing with a rubber bush b or an adhesive is known as Japanese Patent Application Laid-Open No. H11-37340.

[0004]

The above-mentioned conventional means is, in the former case, a holding member 4 for holding the thermally responsive element 3.
In addition, a ventilation hole 42 is provided to improve the convection of air around the temperature sensing portion 30 of the thermoresponsive element 3 so that the heat of the thermoresponsive element 3 is effectively radiated. Since the moisture resistance of the current-carrying parts such as the body 5 and the electrode plates 6, 6 is not taken into consideration, it cannot be used in a humid place such as a bathroom or a place where water is directly applied. In addition, there is a problem that an electric short circuit occurs due to dew condensation caused by a temperature drop when cold water flows in the flow path 12 in the body 1.

In the latter, the heating element 5 and the electrode plate 6
Since the seal for waterproofing the energized portions such as 6 is performed using the seal film a and the rubber bush b, there is a problem that it takes time to assemble.

Also, since a disc-shaped positive temperature coefficient thermistor is used for the heating element 5 and the upper and lower surfaces thereof are respectively electrodes, connection terminals or lead wires are connected to the respective surfaces on which the electrodes are provided. In order to improve the close contact with the thermally responsive element 3, the terminal or the lead wire cannot be directly soldered to the heating element 5 on the surface to be brought into contact with the thermally responsive element 3. In order to take out the terminal 60 by contacting the heating element 5, the electrode plates 6, 6 are respectively in contact with the upper and lower surfaces of the heating element 5, and sandwiched between the electrode plates 6.
6 are provided with terminals 60 projecting out of the heating element 5 and lead wires 61 are connected thereto.

Therefore, when the energized portions of the heating element 5, the electrode plates 6, 6 and the terminals 60, 60 are sealed for waterproofing, the three components of the heating element 5 and the electrode plates 6, 6 are separated. One of the limitations is that the airtight state must be maintained. When insert molding is performed with a resin material to seal a completely waterproof type, the resin material flows between the heating element 5 and the electrode plates 6, 6 during the insert molding, so that connection is made. Since insert molding cannot be performed because the number of defective products increases, airtight processing must be performed by mechanical means, and this work has a troublesome problem.

Further, a positive temperature coefficient thermistor (P
When TC) is used, if there is a difference in the distance between the two electrodes, the density of the current flowing inside the PTC becomes uneven, and the temperature of the portion where the current easily flows increases quickly,
There is a problem that temperature unevenness is generated on the surface of the PTC, and the control of the operation of the thermally responsive element 3 becomes inaccurate.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem which has occurred in the conventional means, and has made it possible to mold a heat-generating portion composed of a heat-generating element and electrodes attached thereto with a resin material. In addition, the heat-generating parts such as the heat-generating elements, electrodes, terminals, etc., which are energized parts, can be completely hermetically sealed, and the temperature unevenness is reduced to such an extent that there is no problem. The purpose is to provide a good thermal valve.

[0010]

According to the present invention, as a means for achieving the above object, a plate-like heating element 5, a pair of electrodes 50 provided on the outer surface thereof, and a pair of electrodes 50 In the heat generating portion H including the terminals 60 connected to the heat-generating element 5, the electrode 50.
50 are electrically separated from each other and provided in pairs.
50 are connected to the respective terminals 60,
The other side, which is in contact with the thermoresponsive element 3, is
0, without the terminal 60 and the electrode plate 6,
An end 60 serving as an electrical connection between the pair of terminals 60
a. Except for a.60a, a heat generating portion mainly used for a thermal valve characterized by being covered and molded with an insulating material z such as a resin, and sealed, and further, a plate-like heat generating element 5 and an outer surface thereof And a pair of electrodes 50 and 50
Heating section H consisting of terminals 60 and 60 connected to 0.50
, Electrodes 50, 50 are electrically separated and provided in a pair on one surface of the heating element 5 opposite to the surface brought into contact with the thermally responsive element 3; Terminals 60 are connected to each other, and the other side of the heating element 5 that is brought into contact with the thermally responsive element 3 is connected to the electrode 50 and the terminal 6.
In a case 7 in which no electrodes 0 and the electrode plate 6 are provided, and a case 7 formed into a thin bottomed cylindrical shape with an insulating material such as a resin, one surface on which the electrodes 50 and 50 are provided is on the top and the other surface is the case 7.
Is inserted into the bottom of the case so as to be in close contact therewith.
A central portion of the lower surface of the terminal 6 serving as a contact surface with the thermally responsive element and an end 6 serving as an electrical connection between the pair of terminals 60
A heat-generating portion mainly used for a heat-operated valve, characterized in that it is covered and molded with an insulating material z such as a resin except for Oa and 60a and sealed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A thermal valve V according to the present invention has a structure of a valve section A for opening and closing a flow path 12 in a body 1 by a valve element 2 and a drive for opening and closing the valve element 2 by energization. The operation by the heat responsive element 3 activated by the heating element 5 that generates heat may be configured in the same manner as the thermal valve V of the conventional means.

For example, as in the previous example shown in FIGS. 1 and 2, a valve portion A in which a valve element 2 for opening and closing a flow path 12 is incorporated in a body 1 and a heat-responsive element are mounted on a holding member 4. 3 and the thermosensitive element 30 of the thermoresponsive element 3
The driving section B may be assembled by assembling and contacting the heating element 5 and a heating section including electrodes and terminals provided thereon, and the thermal valve V may be assembled by combining these.

As shown in FIGS. 4 and 5, the fluid inlet 10 and the fluid outlet 11 are connected to the fluid inlet 10 and the fluid outlet 11 through a flow passage 12 inside the body 1 having a fluid inlet 10 and a fluid outlet 11 provided on the outer periphery. A valve chamber 13 is provided for communication, a valve body 2 for opening and closing the flow path 12 is inserted therein, and a valve shaft 20 connected to the valve body 2 is provided.
Is protruded from an assembling seat 14 provided on the upper surface side of the body 1 to assemble a valve portion A, and a holding member 4 holding a thermally responsive element 3 such as a wax thermoelement is attached thereto. The assembling seat 41 provided on the lower surface side and the assembling seat 14 provided in the valve part A are assembled by coupling, and the temperature-sensitive part 30 of the thermoresponsive element 3 held by the holding member 4
Heating element 5 and electrodes 50, 50 and terminals 60 provided thereon
The heat generating portion composed of 60 elements may be assembled in a contact state to thereby assemble the thermal valve V.

However, the heat-generating part to be assembled in contact with the temperature-sensitive part 30 of the thermo-sensitive element 3 is composed of a heating element 5 formed by molding a positive temperature coefficient thermistor or the like that generates heat by energization into a plate shape, and a heat-generating element 5 for energizing the heating element 5. The pair of electrodes 50, 50 provided and the terminals 60, 60 provided to be connected to the electrodes 50, 50 constitute a heating main body h. The heating main body h is held by the holding member 4. The heat responsive element 3 and the valve portion A are separately separated and assembled separately from them, and only the heat generating main portion h is insert-molded and sealed with an insulating material z such as a resin material. A complete waterproof heat generating portion H can be configured.

The heating main body h is provided with a pair of electrodes 50 provided for energizing the plate-shaped heating element 5.
As shown in FIGS. 6 and 7, only one of the upper and lower surfaces of the plate-like heating element 5 is provided, and the other surface has no electrodes 50. .

At this time, the pair of electrodes 50 provided on one side of the heating element 5 may be attached to the heating element 5 by baking an electrode plate (not shown) formed separately. As shown in FIG. 6, a conductive paint such as a silver paste is printed and baked on one surface of a plate-shaped heating element 5 to be integrally baked, and divided into one half and the other half of the one surface. Each may be provided in a substantially half-moon shape. Those electrodes 50 which are integrally mounted on the heating element 5
The terminals 50 are fixedly connected to 50 by soldering or spot welding, respectively.

As a result, the heating element 5 formed in a plate shape has the electrodes 50, 50 and the terminals 60, 60 connected thereto only on one of the upper and lower surfaces thereof, and the other. There are no protrusions such as the electrodes 50 and 50, the terminals 60 and 60, and the electrode plate 6 does not exist on the surface.

Further, in the case where the pair of electrodes 50 provided on one surface side of the heating element 5 are mounted by printing a conductive paint or the like and firing and baking it,
The heating element 5 is also provided on one side where the electrodes 50 are provided in a pair.
Since there will be no electrode plate made of a separate metal plate,
When the heating main body h to be assembled by providing the electrodes 50, 50, the terminals 60, 60 on the heating element 5 is covered with an insulating material z such as a resin by insert molding and sealed to form a complete waterproof heating section H. The resin material does not flow between the heating element 5 and the electrode plate made of a metal plate, so that a defective product with poor contact is prevented from being formed. Waterproofing can be done without any trouble.

Electrodes 50 and 50 are integrally provided only on one side of the heating element 5 made of a characteristic thermistor or the like formed in a plate shape by printing or baking conductive paint, and a terminal 60 connected to them is provided.・ Electricity is supplied from 60
When electricity is applied to the heating element 50, the heating element 5
As shown by the arrow in FIG. 8, the current flowing through the other electrode 50 flows to the surface side of the heating element 5 where the electrodes 50, 50 having a short distance are provided. Only the flowing surface side first rises in temperature, whereby the resistance increases and electricity stops flowing, so that it flows on the lower layer side of the heating element 5, and the temperature rises to the bottom side in contact with the thermoresponsive element 3. Become like

FIGS. 9 and 10 show means for correcting uneven heating of the heating element 5 when a pair of electrodes are provided on one surface side of the heating element 5 described above.

This means is provided on one side of the heating element 5 as shown in FIG.
, Two electrically separated electrodes 50.
0 is provided so as to face the pair, the pair of electrodes 50
The two electrodes 50 are provided on one side of the heating element 5 where the
A concave groove w which is hollowed out toward the inside of the heating element 5 is formed at a boundary portion divided into 50, as shown in FIG. 9, and the concave groove w extends along the boundary portion as shown in FIG. , Heating element 5
Formed so as to cross from one end on the one side to the other end,
The edge surface distance between the electrodes 50, 50 is increased, whereby
This is a means for correcting the non-uniform heating of the heating element 5 by allowing the current flowing through the electrodes 50 to flow around the concave groove w as indicated by an arrow in FIG.

Next, FIG. 11 shows the heating element 5 when a pair of electrodes 50, 50 are provided on one of the upper and lower surfaces of the heating element 5.
4 shows another means for correcting the non-uniformity of heat generation of the present invention.

This means comprises the electrodes 50 of the heating element 5.
By printing and baking a member y having good electrical conductivity such as a conductive paint on the entire surface on the other side opposite to the one side provided with As shown by the arrow in FIG. 11, the current flowing from the electrode 50 to the other electrode 50 via the heating element 5 flows from the one electrode 50 to the other electrode 50 via the member y having good electric conductivity. Is a means for making the heat generation of each part of the heating element 5 uniform.

This means comprises the above-mentioned pair of electrodes 50
The heat generation of the heat generating element 5 can be made more uniform by using it in combination with the means for forming the concave groove w at the boundary portion of.

In this means, the member y having good electric conductivity provided on the other surface side opposite to the one surface side on which the electrodes of the heating element 5 are provided can generate heat even when a member having good heat conductivity is used. An effect of uniformity can be obtained. From this, it is more effective that the member y having good electric conductivity has good heat conduction.

The heating element 5 includes an electrode 5 provided on one side of the heating element.
The terminals 60 and 60 are connected to the terminals 0.50 and 50, respectively, to form the heating main body h.

Then, the heat-generating portion h serving as the current-carrying portion
Is insert-molded with an insulating material (mold material) z such as a resin, and as shown in FIG. 12, an outer end 60a serving as an electrical connecting portion for connecting the lead wires 61 of the terminals 60. Except for 60a, it is entirely covered and molded to form a waterproof heating section H in which the current-carrying section is sealed.

When insert molding is performed by using the molding material z, as shown in FIGS. 12 and 13, one surface of the plate-shaped heating element 5 provided with a pair of electrodes 50 is the upper surface side. The thickness of the molding material z surrounding the lower surface of the heating element 5 on the lower surface side where the electrodes 50 and 50 are not provided is reduced, and heat is applied below the thin portion. Temperature sensing part 30 of thermoresponsive element 3 of valve train V
Is molded so as to form a fitting concave portion u which fits into the outer end of.

As a result, the heat-generating main portion h, which is an energizing portion,
Is formed by coating with a molding material z in a state in which only an end portion 60a serving as an electrical connection portion for connecting the lead wire 61 of the terminal 60 is protruded, and an internal electrode is formed through a peripheral surface of the terminal 60. As shown in FIG. 14, the terminal 60 is formed in a zigzag shape, a wavy shape, or a comb-like shape because water may enter the heating element 50 and the heating element 5. It is effective to increase the surface distance, so that even if the heating element 5 cools and the inside of the case 7 becomes a negative pressure and absorbs moisture, moisture does not reach the heating element 5. Along with
When the heating element 5 generates heat and the inside of the case 7 becomes a positive pressure, moisture is released to the outside, so that the moisture does not affect the heating element even when the cooling and heating are repeated.

Further, as shown in FIG. 15, a portion which is buried in the molding material z at the time of molding at an intermediate portion in the longitudinal direction of the terminal 60 in order to prevent water entering along the edge surface of the terminal 60. An O-ring-shaped elastic material 8 may be fitted around and adhered to the outer periphery of the O-ring, and then molded as shown in FIG.

The heating element 5 is, as shown in FIG.
The case 7 is inserted into a case 7 made of an insulating material such as a resin material into a bottomed cylindrical shape so that the other surface side opposite to the one surface side on which the electrodes 50 and 50 are provided faces downward. The thickness of the insulating material of the resin material for molding it is formed thin in the bottom wall 70, and this is set in a mold so that the thin bottom wall 70 side is the lower surface side, and FIG. It is also effective to insert-mold and seal with a molding material z to form a double waterproof type.

At this time, the molding by the molding material z causes the end portion 60 a serving as the electrical connection portion of the terminal 60 to protrude, and the heat responsive element 3 on the lower surface side of the bottom wall 70 of the case 7.
In a state where there is no molding material z at the central portion where the outer end surface of the temperature sensing portion 30 contacts, the lower surface of the bottom wall 70 of the case 7 into which the heating element 5 is inserted directly contacts the thermal element 3. You can go. The contact surface of the thermally responsive element 3 with the temperature sensing portion 30 is desirably as thin as possible from the viewpoint of heat conduction, and heat resistance is required because the heating element 5 is in direct contact. The case 7 does not need to consider moldability and the like, and can select a material, molding conditions, and the like. Therefore, a material having heat resistance can be used, and the thickness of the contact surface can be reduced. Since the molding material z does not have a thin portion, it is easy to mold, and an inexpensive material can be employed.

A case 7 into which the heating element 5 is inserted
When there is a difference in the material between the insulating material such as resin for molding the same and the molding material z to be insert-molded, the material is separated between the peripheral surface of the case 7 and the molded molding material z by repeated cooling and heating. This may cause water to infiltrate through the gap, thereby causing the heating element 5 to be affected by moisture.

For this reason, as shown in FIG. 19, the case 7 is formed by forming a corrugated portion 7a on the outer surface side of the peripheral wall so as to increase the edge surface distance, or by molding as shown in FIG. As shown in FIG.
2 is further provided with a ring-shaped portion 7b hanging down the outer peripheral portion of FIG.
2, the edge surface distance is increased by molding so that even if the heating element 5 cools down and the inside of the case 7 becomes a negative pressure and sucks in moisture, the heating element 5 does not absorb moisture. And when the heating element 5 generates heat and the inside of the case 7 becomes a positive pressure, moisture is released to the outside so that the moisture does not affect the heating element 5 even when cooling and heating are repeated.

As a means for waterproofing, an O-ring-shaped elastic member 8 is fitted on the outer peripheral surface of the case 7 as shown in FIG. The elastic member 8 may maintain the sealing performance when peeling occurs by being molded as shown in FIG.

By molding the heat generating portion H in this manner, the airtightness is completely maintained, and even if the airtightness is broken due to repeated cooling and heating, the current-carrying portions of the heating element 5 and the electrodes 50 are affected by moisture. Will not be affected.

The heat generating portion H molded with the molding material z has, for example, a valve portion A formed as shown in FIG.
In the case where the mounting member 41 on the bottom side of the holding member 4 is joined to the holding member 4 and the holding member 4 is assembled, and the thermally responsive element 3 is inserted and held therein, the holding member 4 is held. On the outer end surface of the temperature sensing part 30 of the thermoresponsive element 3, the heating part H molded with the molding material z is brought into contact with the other side opposite to the one side of the heating element 5 on which the electrodes 50 are provided. Mounting seats 90, 90, which are mounted so as to be formed and are molded at a portion molded by the molding material z,
As shown in FIG. 25, the holding members 4 are attached to the holding members 4 by tightening them with the set screws 91 so as to correspond to the upper surfaces of the cylindrical mounting bases 43. To assemble the heat valve V.

When the heat generating portion H is molded with the molding material z and the fitting concave portion u is formed in the molded portion, the fitting concave portion u is connected to the temperature sensing portion 30 of the thermoresponsive element 3. Fit to the outer end side.

Next, FIGS. 26 and 27 show means for using the heat generating portion H as a heater for preventing freezing of a pipe or the like.

FIG. 26 shows a heat generating portion H which is covered and molded with a molding material z so that the mounting surface side is flat as shown in FIG. FIG. 27 shows an example in which a heater for preventing freezing of water is frozen.
The heat generating portion H, which is formed so that the mounting surface side is an arc surface, is formed on the U-shaped mounting bracket 93 which is abutted against the outer surface of the pipe p and is separately formed and fitted to the pipe p. Assembling seat 9
In this example, the set screws 91 and 91 are screwed together so as to be attached to the outer surface of the pipe p and used as a heater for preventing freezing of water in the pipe p.

[0041]

As described above, the heat generating portion of the thermal valve according to the present invention has the electrodes 50, 50 electrically separated on one of the upper and lower surfaces of the plate-like heat generating element 5. A pair of electrodes 50 and 60 are connected to these
On the other surface side opposite to the side where 50 is provided, there is no electrode, terminal, or electrode plate, and the electrical connection portion of the pair of terminals 60 Except for the end portions 60a, 60a, which are covered with an insulating material z such as a resin, they are sealed and sealed, so that complete waterproofing can be achieved, and the heat responsive element 3 can be assembled accurately.

The heat generating portion H is effectively used as a heater (anti-freezing heater) in a place with high humidity, a place where water is splashed, etc., because it is excellent in waterproofness by being covered and molded with the molding material z. Can be

[Brief description of the drawings]

FIG. 1 is an overall vertical side view of a conventional thermal valve.

FIG. 2 is a vertical side view of a drive unit of the thermal valve.

FIG. 3 is a vertical sectional side view of another embodiment of the thermal valve;

FIG. 4 is a side view of a thermal valve for implementing the present invention.

FIG. 5 is a longitudinal sectional side view of the thermal valve.

FIG. 6 is a plan view of a heat-generating main portion of the same thermal valve.

FIG. 7 is a side view of the heat generating main unit according to the third embodiment.

FIG. 8 is an explanatory diagram of an operation of the heat generating main body portion.

FIG. 9 is an explanatory diagram of an operation when a concave groove is provided on one surface side of the heat generating body of the heat generating main body part.

FIG. 10 is a plan view of an example in which a concave groove is provided in the heat generating element of the heat generating main portion according to the third embodiment.

FIG. 11 is an explanatory diagram of an operation when a material having good electrical and thermal conductivity is printed and baked on the other surface side of the heating element of the heating main body part.

FIG. 12 is a vertical side view of a heat generating portion in which the heat generating main portion is molded with a molding material made of an insulating material such as a resin, and is covered and sealed.

FIG. 13 is a vertical cross-sectional front view of the heat generating portion.

FIG. 14 is a perspective view of a terminal of the heating main body of the above.

FIG. 15 is a perspective view showing a state in which an O-ring-shaped elastic material is fitted to the terminal of the heat generating main body part.

FIG. 16 is a vertical sectional side view of a heat generating portion in which an elastic material is attached to terminals of the heat generating main portion and molded.

FIG. 17 is a vertical cross-sectional front view of the heat generating main unit and a case made of an insulating material such as a resin into which the heat generating main unit is inserted.

FIG. 18 is a vertical cross-sectional front view of the heat generating portion in which the heat generating main portion is inserted into a case and molded.

FIG. 19 is a vertical sectional front view of the heating main body and the case of another embodiment according to the embodiment;

FIG. 20 is a longitudinal sectional front view of the heat generating portion inserted into the same case of the heat generating main portion and molded.

FIG. 21 is a vertical sectional front view of the heat generating main body and the case of still another embodiment.

FIG. 22 is a vertical cross-sectional front view of the heat generating portion in which the heat generating main portion is inserted into the case and molded.

FIG. 23 is a longitudinal sectional front view of a heat generating portion in which an O-ring-shaped elastic material is fitted around the outer periphery of a case into which the heat generating main portion is inserted.

FIG. 24 is a longitudinal sectional front view of a heat generating portion in which an elastic material is fitted around the outer periphery of a case in which the heat generating main portion is inserted and molded.

FIG. 25 is a front view of the thermal valve in which the above-described molded heat generating portion is assembled.

FIG. 26 is a vertical sectional front view when the molded heat generating unit is mounted on the outer periphery of a water guide pipe and used as a heater for preventing freezing.

FIG. 27 is a vertical sectional front view when the molded heat generating part is mounted on the outer periphery of a pipe with a U-shaped mounting bracket and used as a heater for preventing freezing.

[Explanation of symbols]

A: Valve section, B: Drive section, H: Heat generation section, h: Heat generation main section, V: Thermal valve, a: Seal film, b: Rubber bush, p
... pipe, u ... fitting concave part, w ... concave groove, y ... good heat conductive member, z ... molding material, 1 ... body, 10 ... fluid inlet, 1
DESCRIPTION OF SYMBOLS 1 ... Fluid outlet, 12 ... Flow path, 13 ... Valve chamber, 14 ... Assembly seat, 2 ... Valve body (valve), 20 ... Valve shaft, 3 ... Thermal response element, 30 ... Temperature sensing part, 31 ... Operating rod 4, a holding member,
40 ... holding lid, 41 ... mounting seat, 42 ... vent, 43 ...
Assembling stand, 5: heating element, 50: electrode, 6: electrode plate, 60:
Terminal, 60a: outer end, 61: lead wire, 7: case,
7a: corrugated portion, 7b: ring-shaped portion, 70: bottom wall, 8: elastic material, 90: assembly seat, 91: set screw, 92: prismatic portion, 93: mounting bracket.

Claims (9)

[Claims] 1. A heating section H comprising a plate-shaped heating element 5, a pair of electrodes 50 provided on the outer surface thereof, and terminals 60 connected to the electrodes 50, 50. Electrodes 50, 50 are electrically separated and provided as a pair on one surface opposite to the surface brought into contact with the thermoresponsive element 3, and respective terminals 60, 60 are connected to the electrodes 50, 50. The other side of the heating element 5 that is brought into contact with the thermoresponsive element 3 is in a state where the electrode 50 / terminal 60 and the electrode plate 6 are not provided, and this is connected to the electrical connection part of the pair of terminals 60/60. A heat generating portion mainly used for a thermal valve, wherein the heat generating portion is characterized by being covered and molded with an insulating material z such as a resin except for the end portions 60a. 2. A heating section H comprising a plate-shaped heating element 5, a pair of electrodes 50 provided on the outer surface thereof, and terminals 60 connected to the electrodes 50, 50. Electrodes 50, 50 are electrically separated and provided as a pair on one surface opposite to the surface brought into contact with the thermoresponsive element 3, and respective terminals 60, 60 are connected to the electrodes 50, 50. The other side of the heating element 5 that is brought into contact with the thermally responsive element 3 is in a state without the electrode 50, the terminal 60 and the electrode plate 6, and is formed into a thin bottomed cylindrical shape with an insulating material such as resin. In the molded case 7, the electrode 50 is inserted so that one surface side on which the electrodes 50 and 50 are provided faces up and the other surface is in close contact with the bottom surface of the case 7. Center portion and the pair of terminals 6
A heat generating portion mainly used for a thermal valve, characterized by being covered and molded with an insulating material z such as a resin except for ends 60a and 60a to be electrical connection portions of 0.60. 3. A heating section H comprising a plate-shaped heating element 5, a pair of electrodes 50 provided on the outer surface thereof, and terminals 60 connected to the electrodes 50, 50. Electrodes 50 and 50 are electrically separated and provided in a pair on one surface side opposite to the surface to be brought into contact with the thermal response element 3, and the terminals 60 and 60 are connected to the electrodes 50 and 50, respectively. The other side of the heating element 5 that is brought into contact with the thermally responsive element 3 is in a state where the electrode 50, the terminal 60, and the electrode plate 6 are not provided. 3. A heat generating part mainly used for a thermal valve according to claim 1, wherein a material y having two properties or any one property of heat conduction is adhered, adhered or coated. 4. A pair of electrodes 50, 50 are provided on one surface of the heating element 5 opposite to the surface brought into contact with the thermally responsive element 3, and are electrically separated from each other. A heating element 5 is provided at the boundary between a pair of
4. A heat generating portion mainly used for a thermal valve according to claim 1, wherein a concave groove w is formed in the inside of the heat valve. 5. The thickness of a portion of the insulating material z such as resin molded of the heat generating portion H, which covers the other surface opposite to the one surface of the heat generating member 5 on which the pair of electrodes 50 is provided, is reduced. 2. The heat generating portion according to claim 1, wherein the thin portion is used as a contact surface with the heat responsive element. 6. The outer periphery of a side wall of a case 7 into which a heating element 5 is formed by inserting a heat generating element 5 into a cylindrical shape having a bottom made of an insulating material such as a resin, excluding a contact surface of the bottom wall of the case 7 with a thermoresponsive element. 3. A heat generating portion mainly used for a thermal valve according to claim 2, wherein a corrugated portion 7a or a convex ring 7b is provided to increase an edge distance of an outer surface of the case 7. 7. An outer peripheral side of a side wall of a case 7 into which a heating element 5 is inserted or a peripheral wall of an outer surface of a bottom wall of the case 7. 3. The heat generating device according to claim 2, wherein an O-ring-shaped elastic body is closely mounted, molded with an insulating material such as a resin material, and sealed to form a heat generating portion. Department. 8. Terminals (60) connected to the electrodes (50) provided on the heating element (5) are formed in a corrugated or comb-like shape, and the terminals (60) of the terminal (60) are connected from the end connected to the electrode (50) to the other end. 3. A heat generating portion mainly used for a thermal valve according to claim 1, wherein an edge surface distance to an end portion 60a to be an electric connection portion is increased. 9. Around the longitudinally intermediate portions of the terminals 60 connected to the electrodes 50 provided on the heating element 5,
3. A heat generating portion mainly used for a thermal valve according to claim 1, wherein the O-ring-shaped elastic body 8 is closely mounted, molded with an insulating material z such as a resin material, and sealed.