JP2023528910A - Heating Elements, Heating Assemblies and Heating Devices - Google Patents

Abstract

The present invention relates to heating elements (100, 200), heating assemblies (10, 20) and heating devices. The heating element (100, 200) includes a base (110, 210), a heat generating circuit (130, 230), and a temperature measuring circuit (150, 250). The base (110, 210) has a bottom surface (115). ) is provided, the electrode installation area (117) is closer to the bottom surface (115) than the heating area (119, 319), the heating circuit (130, 230) is located on the substrate (110, 210), the heating circuit (130, 230) includes a heating part (131, 231) and a heating electrode (133, 233) electrically connected to the heating part (131, 231), (131, 231) are located in the heat generation region (119, 319), the heat generation electrodes (133, 233) are located in the electrode installation region (117), the temperature measurement circuit (150, 250) is located on the substrate (110, 210), the temperature measurement circuit (150, 250) is spaced apart from the heat generation circuit (130, 230), and the temperature measurement circuit (150, 250) is , a temperature measuring part (151, 251, 351) and a temperature measuring electrode (153, 253) electrically connected to the temperature measuring part (151, 251, 351), the heat generating region (119, 319) includes a high temperature region (119a), and the temperature measuring part (151, 251, 351) is located in the high temperature region (119a). The deviation between the actual temperature and the design temperature at the heating start stage of the heating element is smaller. [Selection drawing] Fig. 3

Description

This application claims priority from a Chinese patent application with application number 202011066148.7 entitled "Heat generating element, heat generating assembly and heating device" filed with the Chinese Patent Office on September 30, 2020 , the entire contents of which are incorporated herein by reference.

The present invention relates to the technical field of non-combustion heating smoking articles, and more particularly to heating elements, heating assemblies and heating devices.

Non-combustion heating smoking devices mainly bake tobacco at a low temperature of 200° C. to 400° C. to generate smoke, but do not generate a large amount of harmful substances by decomposition. At present, non-combustion heating smoking articles mainly heat the cigarette or smoke grenades by heat generated by the heating element. However, in actual use, the temperature of the conventional heating element at the beginning of heating has a larger deviation from the design temperature, which is inconsistent with the baking temperature of cigarettes and smoke bombs, and the smoking experience is not good.

In view of this, there is a need to provide a heating element that can reduce the deviation between the actual temperature at the start of heating and the design temperature.

The heating element is
a base having a bottom surface, the base being provided with a heat generation region and an electrode installation region adjacent to the heat generation region, the electrode installation region being adjacent to the bottom surface;
A heat generating circuit positioned on the base, the heat generating circuit including a heat generating portion and a heat generating electrode electrically connected to the heat generating portion, the heat generating portion forming the heat generating region on the base, a heating circuit in which the heating electrode is located within the electrode installation area;
A temperature measuring circuit located on the substrate, the temperature measuring circuit being spaced apart from the heat generating circuit, the temperature measuring circuit electrically connected to the temperature measuring section and the temperature measuring section. a hot electrode, the heat generation region includes a high temperature region, and the temperature measurement unit includes a temperature measurement circuit positioned within the high temperature region.

According to the above heating element, the heating circuit and the temperature measuring circuit are provided independently of each other, and the temperature measuring part of the heating element is provided in the high temperature region of the heat generating region. The temperature can be reacted more accurately, which is advantageous for more accurately controlling the temperature at the start of heating, and can reduce the deviation between the actual temperature at the start of heating and the design temperature.

In one embodiment, the high temperature zone is spaced apart from the electrode installation area, and the temperature measuring electrode extends from the heat generation area to the electrode installation area, or the high temperature area is spaced apart from the electrode installation area. Adjacent to the area, the temperature measuring electrode is located completely within the electrode placement area.

In one embodiment, the substrate has a columnar shape or a short sheet shape, the electrode installation region and the heat generating region are arranged in the longitudinal direction of the substrate, and the length of the high temperature region in the longitudinal direction of the substrate; The ratio of the total length of the heating region and the electrode installation region in the longitudinal direction of the substrate is 1:(2 to 5).

In one embodiment, the ratio of the length of the hot region in the longitudinal direction of the substrate to the length of the heat generation region in the longitudinal direction of the substrate is 1:(5-4).

In one embodiment, the heating electrode includes a first electrode and a second electrode spaced apart from the first electrode, and the temperature measuring electrode includes a third electrode and the a third electrode and a fourth electrode spaced apart from each other, wherein each of the first electrode, the second electrode, the third electrode, and the fourth electrode has a lead wire; connected and each lead wire is spaced apart from each other.

In one embodiment, the heating portion is U-shaped, one end of the heating portion is electrically connected to the first electrode, and the other end of the heating portion is electrically connected to the second electrode. the temperature measuring portion is close to the bottom of the heat generating portion, the temperature measuring portion is away from the opening formed by the ends of the heat generating portion; and/or
The temperature measuring portion is U-shaped, one end of the temperature measuring portion is electrically connected to the third electrode, and the other end of the temperature measuring portion is electrically connected to the fourth electrode. .

In one embodiment, the heating section includes a plurality of heating lines provided at intervals, one end of each of the heating lines is electrically connected to the first electrode, and the other end is the second electrode. The temperature measuring part is located between the gaps between the bottoms of the adjacent heating wires and is spaced apart from the heating wires.

In one embodiment, the heating portion includes two heating wires spaced apart, the first electrode and the second electrode are both U-shaped, and the third A portion of the electrode is located inside the first electrode and a portion of the fourth electrode is located inside the second electrode.

In one embodiment, the heating part includes a heating wire, the heating region includes the high temperature region and the non-high temperature region, the high temperature region and the non-high temperature region are both provided with a heating wire, and the high temperature The width of the heating line in the region is smaller than the width of the heating line in the non-high temperature region.

In one embodiment, the heating line includes an electrode segment, an intermediate segment and a top segment connected in order, the electrode segment being close to the heating electrode, and the top segment being close to the temperature measuring part. and the widths of the electrode segments and the top segment are greater than the width of the middle segment.

In one embodiment, the base has a columnar shape or a short sheet shape, the base includes a body and an insulating layer positioned on the body, and the body includes a base and a tip connected to the base. wherein the tip extends in a direction away from the base, the width of the cross section of the tip gradually narrows along the direction away from the base, and the insulating layer comprises the It is wound on the base, and the heating circuit and the temperature measuring circuit are located on the insulating layer.

In one embodiment, the base is a ceramic base or a stainless steel base, the insulation layer is a glass ceramic insulation layer or a low temperature ceramic insulation layer, and/or the thickness of the insulation layer is between 0.02 mm and 0.02 mm. .5 mm.

In one embodiment, at room temperature, the resistance of the heating part is 0.5Ω~2Ω, and/or at room temperature, the resistance of the temperature sensing part is 1.5Ω~20Ω.

In one embodiment, the heat generating part is a positive temperature coefficient thermistor,
and/or the temperature measuring unit is a positive temperature coefficient thermistor,
and/or the sheet resistance of the heating portion is 20 mΩ/□ to 200 mΩ/□,
and/or the temperature measuring unit has a sheet resistance of 20 mΩ/□ to 200 mΩ/□,
and/or the heat generating portion contains at least one of nickel, silver, palladium, platinum and ruthenium,
and/or the temperature measuring portion contains at least one of nickel, silver, palladium, platinum and ruthenium.

In one embodiment, the temperature coefficient of resistance of the heating portion is smaller than the temperature coefficient of resistance of the temperature measuring portion.

In one embodiment, the material of the heating part is selected from one of a nichrome alloy, a tantalum alloy, a gold-chromium alloy, and a nickel-phosphorus alloy,
And/or the material of the temperature measuring part is selected from at least one of copper, nickel, manganese, and ruthenium.

In one embodiment, the sheet resistance of the heating electrode does not exceed 5 mΩ/□ and the sheet resistance of the temperature measuring electrode does not exceed 5 mΩ/□.

In one embodiment, the heating element further includes a protective layer covering the heating portion, the temperature measuring portion, and part of the temperature measuring electrode.

A heat generating assembly is provided that includes a mounting seat and the above-described heating element mounted on the mounting seat.

A heating device is provided that includes a case and the heat generating assembly described above.

1 is a perspective view of a heat generating assembly of one embodiment; FIG. 2 is an exploded view of the heat generating assembly shown in FIG. 1; FIG. 2 is an exploded view of a heating element of the heating assembly shown in FIG. 1; FIG. 2 is another exploded view of the heating element of the heating assembly shown in FIG. 1; FIG. FIG. 2 is a schematic view of the heat generating assembly shown in FIG. 1 after concealing the sealing member and the mounting cover; 2 is a front view of the heat generating assembly shown in FIG. 1; FIG. Figure 7 is a cross-sectional view of the heat generating assembly shown in Figure 6 along line AA; FIG. 11 is a perspective view of a heat generating assembly of another embodiment; FIG. 9 is an exploded view of the heat generating assembly shown in FIG. 8; 9 is another exploded view of the heat generating assembly shown in FIG. 8; FIG. FIG. 9 is a schematic view of the heating element of the heating assembly shown in FIG. 8 after hiding the protective layer; FIG. 9 is a configuration diagram after the mounting cover of the heat generating assembly shown in FIG. 8 is hidden; 4 is a temperature control curve of the heat generating assembly of Example 1; 3 is a configuration diagram of a temperature measuring circuit and a heat generating circuit of a heat generating assembly of Comparative Example 1; FIG. 4 is a temperature control curve of the heat generating assembly of Comparative Example 1;

The following provides a more complete description of the invention in order to facilitate its understanding, but the invention can be embodied in many different forms and is not limited to the examples set forth herein. Rather, the purpose of providing these examples is to provide a more thorough and comprehensive understanding of the present disclosure.

It should be noted that when one component is said to be "fixed to" another component, there may be one or more components that lie directly on or intervene with the other component. When one component is considered to be “connected” to another component, there may be one or more components that are directly connected to or intervene with the other component. When using terms such as "vertical", "horizontal", "left", "right", "top", "bottom", "inside", "outside", "bottom" to indicate orientation or positional relationships , are intended only to facilitate explanation based on the orientation or positional relationships shown in the drawings, and the devices or parts referred to must have a particular orientation and be configured and operated in a particular orientation. It is not meant or implied that it should not be, and should not be taken as limiting the invention. Also, terms such as "first", "second", etc. are used for descriptive purposes only and are not to be understood as meaning or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

1 and 2, one embodiment of the present invention provides a heating assembly 10 including a mounting seat 101 and a heating element 100 attached to the mounting seat 101. As shown in FIG.

Specifically, referring to FIGS. 3 and 4, the heating element 100 includes a substrate 110, and a heating circuit 130 and a temperature measuring circuit 150 provided on the substrate 110. The heating circuit 130 and the temperature measuring circuit 150 are independent of each other.

The base 110 is used to support the heat generating circuit 130 and the temperature measuring circuit 150 . The substrate 110 has a bottom surface 115 , the substrate 110 includes a main body 111 and an insulating layer 113 , and the heating circuit 130 and the temperature measuring circuit 150 are located on the insulating layer 113 . The main body 111 includes a base portion 111a and a tip portion 111b connected to the base portion 111a, the base portion 111a being columnar, and the tip portion 111b extending away from the base portion 111a and having a width of a cross section of the tip portion 111b. gradually narrows along the direction away from the base 111a. Base portion 111a supports insulating layer 113 and tip portion 111b is positioned to facilitate insertion of heating element 100 into an object to be heated (eg, a cigarette). In one alternative embodiment, the base 111a is cylindrical, triangular prismatic, or square prismatic. Of course, in some other embodiments, the shape of the base 111a is not limited to the above and may be other shapes. In the embodiment shown in FIG. 3, the longitudinal cross-section of base 111a is rectangular and the longitudinal cross-section of tip 111b is an isosceles triangle. Of course, in other embodiments, the vertical cross-section of the tip portion 111b is not limited to an isosceles triangle, and may be another triangle.

In some embodiments, base 111a is a hollow structure. The hollow base portion 111a can reduce the weight of the heating element 100, reduce the heat transfer to the electrode installation region 117, and improve the heat utilization rate.

In some embodiments, a blind hole is provided in a region of base 111a remote from tip 111b. Furthermore, the blind hole is close to the mounting seat 101 . By providing a blind hole in the base portion 111a close to the mounting seat 101, similarly, the heat transfer to the mounting seat 101 is reduced, the heat utilization rate is improved, and the mounting seat 101 and other parts in the mounting seat 101 The life of parts can be improved.

Specifically, the body 111 is a ceramic body 111 such as a zirconia ceramic body 111, an alumina ceramic body 111, or the like. Further, the base portion 111a is a ceramic base portion 111a and the tip portion 111b is a ceramic tip portion 111b. Of course, in some other embodiments, the material of the base 111a is not limited to ceramic, but may be other materials such as stainless steel. The material of the tip portion 111b is also not limited to ceramic, and may be other materials such as stainless steel.

The insulating layer 113 is wound around the base portion 111a, and the insulating layer 113 supports the heating circuit 130 and the temperature measuring circuit 150 and also functions as insulation. Specifically, the insulating layer 113 is wound around the outer surface of the main body 111 . In the embodiment shown in FIG. 3, insulating layer 113 is wrapped around the outer surface of base 111a. In some embodiments, first, the heating circuit 130 and the temperature measuring circuit 150 are fabricated on the insulating layer 113 by silk printing, and then the insulating layer 113 is wrapped around the base 111a (for example, by casting) to form the insulating layer together with the base. By sintering, the efficiency of the work of fabricating the heating circuit 130 and the temperature measuring circuit 150 on the columnar base portion 111a can be improved, and since the heating circuit 130 and the temperature measuring circuit 150 are minute, the columnar main body The problem of difficulty in working on 111 can be avoided.

Specifically, the insulating layer 113 is a glass ceramic insulating layer 113 or a low temperature ceramic insulating layer 113 . The material of the glass-ceramic insulating layer 113 is crystallized glass. The material of the low temperature ceramic insulating layer 113 is low temperature ceramic. In one alternative embodiment, insulating layer 113 is a glass-ceramic insulating layer 113 and the material of insulating layer 113 is calcium borosilicate glass-silicon oxide filler. In another optional embodiment, the insulating layer 113 is a barium tin borate ceramic insulating layer 113 or a barium zirconium borate ceramic insulating layer 113, and the material of the insulating layer 113 is barium tin borate ceramic or barium borate ceramic. Zirconium ceramic. Of course, it will be appreciated that the material of the insulating layer 113 is not limited to the above and may be other materials that can be wound around the body 111 as the insulating layer 113 . In this specification, low-temperature ceramics refer to ceramics having a sintering temperature of 1000° C. or less. Furthermore, the material of the base portion 111a is different from the material of the insulating layer 113 . For example, a material with higher ductility than the base portion 111a is selected for the insulating layer 113, and a material with higher hardness than the insulating layer 113 is selected for the base portion 111a.

In this embodiment, the thickness of the insulating layer 113 is 0.02 mm to 0.5 mm. Optionally, the thickness of the insulating layer 113 is 0.02mm, 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm.

As will be appreciated, in some embodiments, insulating layer 113 may be omitted. If the insulating layer 113 is omitted, the main body 111 may be made of an insulating material.

3 or 4, the substrate 110 has a columnar shape, and on the substrate 110, a heating region 119 and an electrode installation region 117 adjacent to the heating region 119 are provided. 119 are arranged along the longitudinal direction of the base 110 , and the electrode installation region 117 is closer to the bottom surface 115 than the heat generating region 119 . The heating area 119 is an area where the heating element 100 generates heat, the heating circuit 130 is located in the heating area 119 , and the electrode installation area 117 is an area where the heating element 100 is attached to the mounting seat 101 . Further, the heat generating region 119 includes a high temperature region 119a, which is a region where the heating element 100 becomes hot during operation. In one embodiment, hot zone 119 a is spaced apart from electrode placement zone 117 . In another embodiment, hot zone 119 a is adjacent to electrode placement zone 117 .

Specifically, when the substrate 110 is a columnar or short sheet-shaped heating element 100, the length of the high temperature region 119a in the longitudinal direction of the substrate 110 (a in FIG. 3) and the heat generation in the longitudinal direction of the substrate 110 The ratio of the total length of the region 119 and the electrode installation region 117 (b in FIG. 3) is 1:(2 to 5). Furthermore, the ratio of the length of the high temperature region 119a in the longitudinal direction of the substrate 110 to the length of the heat generating region 119 in the longitudinal direction of the substrate 110 (c in FIG. 3) is 1:(1.5 to 4). In the embodiment shown in FIG. 3, the ratio of the length of the high-temperature region 119a in the longitudinal direction of the substrate 110 to the total length of the heating region 119 and the electrode installation region 117 in the longitudinal direction of the substrate 110 is 1:3. be. The ratio of the length of the high temperature region 119a in the longitudinal direction of the substrate 110 to the length of the heat generation region 119 in the longitudinal direction of the substrate 110 is 1:2.

Referring to FIG. 3, the heating circuit 130, which is the portion of the heating element 100 that generates heat, is attached to the insulating layer 113. As shown in FIG. The heat generating circuit 130 includes a heat generating portion 131 and a heat generating electrode 133 electrically connected to the heat generating portion 131 . The heating electrode 133 is a component for connecting the heating portion 131 and a power source. The heat generating portion 131 is attached to the surface of the insulating layer 113 away from the main body 111 , the heat generating portion 131 forms the heat generating region 119 in the insulating layer 113 , and the heating electrode 133 is also attached to the surface of the insulating layer 113 . The heating electrode 133 includes a first electrode 133a and a second electrode 133b. The first electrode 133 a is electrically connected to one end of the heat generating portion 131 , and the second electrode 133 b is electrically connected to the other end of the heat generating portion 131 . Of course, the first electrode 133a and the second electrode 133b are spaced apart and connected to both poles (positive and negative) of the power source, respectively. In another embodiment, heat generating circuit 130 and temperature measuring circuit 150 are provided on the same surface of insulating layer 113, and heat generating circuit 130 and temperature measuring circuit 150 are in close contact with the outer surface of base 111a.

Specifically, the heating portion 131 includes a heating wire 131a having one end electrically connected to a first electrode 133a and the other end connected to a second electrode 133b. Furthermore, the heating wire 131a is connected to the first electrode 133a and the second electrode 133b by silk printing. In an alternative specific example, the heating part 131 includes one U-shaped heating wire 131a, the heating wire 131a is attached to the surface of the insulating layer 113 away from the main body 111, and the heating wire 131a One end is electrically connected to the first electrode 133a, and the other end is connected to the second electrode 133b. In the embodiment shown in FIG. 3, the heating part 131 is two heating wires 131a spaced apart from each other on the insulating layer 113, and both of the two heating wires 131a are U-shaped. One heating wire 131a is located inside the other heating wire 131a, the first electrode 133a and the second electrode 133b are both U-shaped, and both ends of the first electrode 133a are It is electrically connected to one end of each of the two heating wires 131a, and both ends of the second electrode 133b are electrically connected to the other ends of the two heating wires 131a. As can be understood, in other embodiments, the number of heating lines 131a is not limited to the above, and may be other numbers. When there are a plurality of heating lines 131a, the plurality of heating lines 131a are provided at intervals, and one end of each heating line is electrically connected to the first electrode 133a, and the other end is connected to the first electrode 133a. 2 electrode 133b. Of course, the shape of the heating wire 131a is also not limited to the U shape, and may be other shapes such as a V shape and an S shape. The shape of the first electrode 133a and the second electrode 133b is also not limited to the U-shape, and may be strip-shaped or L-shaped.

In one embodiment, the heat generating region 119 consists of a hot region 119a and a non-hot region. The width of the heating wire 131a in the high temperature region 119a is smaller than the width of the heating wire 131a in the non-high temperature region. The substrate 110 has a columnar shape or a short sheet shape, the length of the high temperature region 119a is the length of the heating wire 131a with a small width in the longitudinal direction of the substrate 110, and the width of the high temperature region 119a is the width of the substrate 110. is.

Specifically, the heating line 131 a includes an electrode segment, an intermediate segment and a top segment which are connected in order, the electrode segment being close to the heating electrode 133 and the top segment being close to the temperature measuring section 151 . In one alternative embodiment, the width of the middle segment is smaller than the width of the electrode segments and the top segment (the width of the middle segment being the smallest). By setting the width of the middle segment of the heating wire 131a to be smaller than the width of the electrode segment and the top segment, the heat generated by the heating element 100 is concentrated in the middle segment and diffused to the top segment and the electrode segment, thereby eliminating smoke during heating. In addition to adjusting the texture, the temperature of the area close to the heating electrode 133 can be lowered to prevent the mounting seat from being affected or damaged by high temperatures. That is, when the width of the middle segment of the heating wire 131a is smaller than the width of the electrode segment and the top segment, the high temperature region 119a is the region where the middle segment is located, and the length of the high temperature region 119a is the longitudinal direction of the substrate 110. is the length of the middle segment at , and the width of hot region 119 a is the width of substrate 110 . In this case, the hot region 119a is spaced apart from the electrode placement region 117 .

In another optional embodiment, the width of the top segment of the heating wire 131a is smaller than the width of the electrode segment and the middle segment so that the heat generation of the heating element 100 is concentrated in the top segment, and the high temperature region 119a is the top segment. The length of the hot zone 119 a is the length of the top segment in the longitudinal direction of the substrate 110 , and the width of the hot zone 119 a is the width of the substrate 110 . In this case, the hot region 119a is spaced apart from the electrode placement region 117 .

In another optional embodiment, the width of the electrode segments of the heating wire 131a is smaller than the width of the middle and top segments so that the heat generation of the heating element 100 is concentrated on the electrode segments, and the high temperature region 119a is The length of the hot region 119 a is the length of the electrode segment in the longitudinal direction of the substrate 110 , and the width of the hot region 119 a is the width of the substrate 110 . In this case, the high temperature region 119 a is adjacent to the electrode placement region 117 .

Specifically, the heat generating portion 131 is made of a resistive paste with a high resistivity. More specifically, the heating wire 131a is made of resistive paste with high resistivity. The heat generating portion 131 can be formed by silk-printing a thick film paste to transfer a resistive paste having a high resistivity onto the insulating layer 113 and then sintering it. Specifically, at least one of nickel (Ni), silver (Ag), palladium (Pd), platinum (Pt), and ruthenium (Ru) is used in the high-resistivity resistor paste for fabricating the heat generating portion 131 Contains seeds. Further, the resistance paste for making the heating portion 131 contains nickel, silver-palladium alloy (AgPd), silver-platinum alloy (AgPt), or silver-ruthenium alloy (Ag-Ru). Of course, the high-resistivity resistive paste from which the heating portion 131 is made further contains a binder, such as an inorganic binder. As can be appreciated, the proportion of binder in high resistivity resistor pastes is relatively low. Of course, the method of manufacturing the heat generating portion 131 is not limited to this, and other methods commonly used in the field may be used.

In one embodiment, the sheet resistance of the heating portion 131 is 20 mΩ/□ to 200 mΩ/□. Further, the sheet resistance of the heating portion 131 is 20 mΩ/square, 50 mΩ/square, 80 mΩ/square, 100 mΩ/square, 120 mΩ/square, 150 mΩ/square, 180 mΩ/square, or 200 mΩ/square.

In one embodiment, at room temperature, the resistance of the heating part 131 is 0.5Ω to 2Ω. Furthermore, at room temperature, the resistance of the heating portion 131 is 1Ω to 2Ω. Of course, in other embodiments, the resistance of the heating part 131 at room temperature is not limited to the above, and the material of the resistance paste for making the heating part 131, the length of the heating part 131, the length of the heating part 131, and the The width of the heat generating portion 131, the thickness of the heat generating portion 131, and the pattern of the heat generating portion 131 may be adjusted to set the resistance of the heat generating portion 131.

In one embodiment, heat generating portion 131 is a positive temperature coefficient thermistor. By using a positive temperature coefficient thermistor as the heat generating part 131, the heat generating part 131 can be rapidly heated. Therefore, almost no current flows through the heat generating portion 131 and the heat generation is stopped, so that the temperature of the heat generating region 119 can be prevented from continuously becoming too high.

Specifically, the heating electrode 133 is made from a resistive paste with low resistivity. More specifically, the first electrode 133a and the second electrode 133b are made from a low resistivity resistive paste. Similarly, the heating electrode 133 can be formed by silk-printing a paste to transfer a resistive paste having a low resistivity onto the insulating layer 113 and then sintering the paste. Specifically, at least one of silver (Ag) and gold (Au) is contained in the low-resistivity resistive paste for fabricating the heating electrode 133 . In one alternative embodiment, the resistive paste from which the heating electrode 133 is made includes Ag, Au, gold alloys, or silver alloys. Of course, the low resistivity resistive paste from which the heating electrode 133 is made also contains a binder, for example an inorganic binder. As can be seen, the binder percentage in the low resistivity resistor paste is greater than the binder percentage in the high resistivity resistor paste. Of course, the method of manufacturing the heating electrode 133 is not limited to this, and other methods commonly used in the field may be used.

In this embodiment, the sheet resistance of the heating electrode 133 does not exceed 5 mΩ/□. Furthermore, the sheet resistance of the heating electrode 133 is 1 mΩ/□ to 5 mΩ/□. The resistance of the heating electrode 133 is much smaller than the resistance of the heating portion 131, and the resistance of the heating electrode 133 is, for example, 0.1Ω to 0.5Ω. In this way, the heating electrode 133 hardly generates heat when energized, thereby lowering the temperature of the mounting seat 101 and saving power consumption.

Referring to FIG. 3, the temperature measurement circuit 150 is used to feed back the temperature of the heating element 100, the temperature measurement circuit 150 is attached to the surface of the insulating layer 113 away from the main body 111, and the heating circuit The temperature measurement circuit 150 is spaced apart from the heat generation circuit 130 so that the temperature measurement circuit 130 and the temperature measurement circuit 150 are independent of each other. When the heat generating circuit 130 and the temperature measuring circuit 150 are arranged independently of each other, the self heat generation of the temperature measuring circuit 150 is small, the noise signal due to current heating is small, and it is advantageous for precise control of the temperature of electronic components.

Specifically, temperature measurement circuit 150 includes temperature measurement section 151 and temperature measurement electrode 153 electrically connected to temperature measurement section 151 . The temperature measuring part 151 is a part for measuring the temperature in the temperature measuring circuit 150, the temperature measuring part 151 is located in the high temperature region 119a, and the temperature measuring electrode 153 connects the temperature measuring part 151 to the power supply. The temperature measuring electrode 153 is attached to the insulating layer 113 . When the high temperature region 119 a and the electrode installation region 117 are spaced apart, the temperature measuring electrode 153 extends from the heat generating region 119 into the electrode installation region 117 . When the high temperature region 119 a and the electrode installation region 117 are adjacent, the temperature measuring electrode 153 is completely located within the electrode installation region 117 . In one alternative embodiment, one end of the temperature measuring electrode 153 that is closest to the temperature measuring portion 151 is flush with one end of the heating electrode 133 that is close to the heating portion 131 . The temperature measuring section 151 has resistance TCR characteristics, ie there is a specific correspondence between temperature and resistance. A specific current value is obtained when a constant voltage is applied to the temperature measuring section 151 by the power supply and the electronic control device, the resistance value of the temperature measuring section 151 is obtained, and the temperature of the heating element 100 is determined from the measured resistance value. can get. More specifically, the temperature measuring electrode 153 includes a third electrode 153a and a fourth electrode 153b. One end of the temperature measuring portion 151 is electrically connected to the third electrode 153a, and the other end of the temperature measuring portion 151 is electrically connected to the fourth electrode 153b. In one alternative embodiment, the temperature measuring portion 151 is welded to the third electrode 153a and the fourth electrode 153b.

In the heating element 100, the temperature of the heating element 100 is often gradually lowered from the heating region 119 to the electrode installation region 117. FIG. The main reason for this is that when the user is inhaling smoke, the air current flows from the electrode installation area 117 toward the heat generation area 119, that is, the temperature of the electrode installation area 117 is lowered first, but due to the heat conduction characteristics, This is because the heat is slightly greater at higher elevations than at lower elevations. Since the temperature of the heat generating region 119 away from the electrode installation region 117 is often higher than the temperature of the heat generating region 119 close to the electrode installation region 117, the temperature measurement part 151 is placed in the heat generating region away from the electrode installation region 117. 119, the temperature of the heating element 100 can be reflected more accurately, which is advantageous for more accurately controlling the temperature at the start of heating and reducing the deviation between the temperature at the start of heating and the design temperature. can be made smaller. Furthermore, the temperature measuring section 151 is located within the high temperature region 119a. Since the temperature measuring part 151 is positioned within the high temperature region 119a, the maximum temperature of the heating element 100 is more accurately reflected, which is more advantageous for controlling the voltage of the heating circuit of the heating element 100, and the heat generation of the heating circuit 130 is controlled. , the deviation between the actual temperature at the heating start stage and the design temperature can be made smaller, and the consistency between the actual temperature at the actual heating start stage and the design temperature can be improved.

More specifically, temperature measuring unit 151 includes a temperature measuring line. In the embodiment in which the heating portion 131 is one U-shaped heating wire 131a, the temperature measuring portion 151 is one temperature measuring wire, and the temperature measuring wires are the U-shaped heating wire 131a and the first heating wire 131a. It is away from the connection point between the electrode 133a and the second electrode 133b (that is, the opening formed by both ends of the U-shaped heating wire 131a) and is close to the bottom of the U-shaped heating wire 131a. Moreover, the temperature measuring wire is positioned inside the U-shaped heating wire 131a. In an embodiment in which the number of heating wires 131a of the heating part 131 is plural, the number of temperature measuring wires may be one or plural. Alternatively, when there is one temperature measuring wire, the temperature measuring wire is provided in the high temperature region 119a formed by the plurality of heating wires 131a, and when there are multiple temperature measuring wires, the plurality of temperature measuring wires are provided. It is provided at intervals in the high temperature region 119a formed from the heating wire 131a.

In the embodiment shown in FIG. 3, the temperature measuring line is also U-shaped, and the high temperature region 119a formed from the heating line 131a extends from the bottom surface 115 of the substrate 110 to 2/3 of the length of the substrate. is also a large heat generation region 119 . In the high-temperature region 119a, the temperature measurement line is located between the two U-shaped heating lines 131a, and the temperature measurement line is spaced apart from the two U-shaped heating lines 131a. The portions of the third electrode 153a and the fourth electrode 153b on the side of the insulating layer 113 away from the main body 111 are strip-shaped, and part of the third electrode 153a is inside the first electrode 133a. , and part of the fourth electrode 153b is located inside the second electrode 133b.

Of course, in other embodiments, the shape of the temperature measuring line is not limited to the U-shape, and may be other shapes such as a V-shape, an S-shape, and the like. The shape of the third electrode 153a and the fourth electrode 153b is also not limited to a strip shape, and may be another shape such as an L shape.

Specifically, the temperature measuring portion 151 may similarly be made from a resistive paste with a high resistivity. More specifically, the thermometer wire may also be made from a high resistivity resistive paste. The temperature measuring part 151 can be formed by silk-printing a thick film paste to transfer a resistive paste having a high resistivity to the insulating layer 113 and then sintering the resistive paste. In this embodiment, at least one of nickel (Ni), silver (Ag), palladium (Pd), platinum (Pt), and ruthenium (Ru) is used in the high-resistivity resistance paste for fabricating the temperature measuring unit 151. Contains one. Furthermore, the resistance paste for making the temperature measuring part 151 contains nickel, silver-palladium alloy (AgPd), silver-platinum alloy (AgPt), or silver-ruthenium alloy (Ag-Ru). Of course, the high-resistivity resistive paste from which the temperature measuring part 151 is made also contains a binder, for example an inorganic binder. As can be appreciated, the proportion of binder in high resistivity resistor pastes is relatively low. Of course, the method of manufacturing the temperature measuring part 151 is not limited to this, and other methods commonly used in the field may be used.

In one example, the sheet resistance of the temperature measuring part 151 is 20 mΩ/□ to 200 mΩ/□. Furthermore, the sheet resistance of the temperature measuring part 151 is 20 mΩ/square, 50 mΩ/square, 80 mΩ/square, 100 mΩ/square, 120 mΩ/square, 150 mΩ/square, 180 mΩ/square, or 200 mΩ/square.

Since the temperature measuring part 151 does not need to generate heat, its initial resistance value is usually larger than the resistance of the temperature measuring part 151 . In one embodiment, at normal temperature, the resistance of the temperature measuring part 151 is 1.5Ω to 20Ω. Furthermore, at room temperature, the resistance of the temperature measuring section 151 is 10Ω to 20Ω. Of course, in other embodiments, the resistance of the temperature measuring part 151 at room temperature is not limited to the above, and if necessary, the material of the resistance paste for making the temperature measuring part 151, the length of the temperature measuring part 151, The resistance of the temperature measuring portion 151 can be set by adjusting the width of the temperature measuring portion 151, the thickness of the temperature measuring portion 151, and the pattern of the temperature measuring portion 151. FIG.

In one embodiment, temperature measuring unit 151 is a positive temperature coefficient thermistor. By using a positive temperature coefficient thermistor as the temperature measuring unit 151, the change in the resistance value due to the temperature change is increased, and the temperature of the surrounding environment can be reflected more accurately. Furthermore, the temperature coefficient of resistance of the heating portion 131 is lower than the temperature coefficient of resistance of the temperature measuring portion 151 . Since the temperature coefficient of resistance of the heat generating portion 131 is lower than that of the temperature measuring portion 151, the heat generating function and the temperature measuring function are separated, and the power consumption and cost of the heat generating circuit 130 are reduced. In one alternative embodiment, the material of the heat generating portion 131 is selected from one of nichrome alloy, tantalum alloy, gold-chromium alloy, and nickel-phosphorus alloy. By employing the above materials, the temperature coefficient of resistance of the heat generating portion 131 can be made lower. In this case, the change in the resistance value of the heat generating portion 131 due to the temperature change becomes very small, the resistance value becomes stable and reliable, and the heat generation is stabilized. A material of the temperature measuring part 151 is selected from at least one of copper, nickel, manganese, and ruthenium. Furthermore, the material of the temperature measuring part 151 is selected from one of copper, nickel, manganese, and ruthenium. According to the TCR characteristics, the internal resistance of the temperature measuring unit 151 increases as the temperature rises, and the increase in the internal resistance becomes more pronounced as the temperature coefficient of resistance of the temperature measuring unit 151 increases. The larger it is, the easier it is to measure with the current sensor, and the more accurate the measurement results.

Specifically, the temperature measuring electrode 153 is also made from a low resistivity resistive paste. More specifically, the third electrode 153a and the fourth electrode 153b are also made from a low resistivity resistive paste. The temperature measuring electrode 153 can be formed by silk-printing a paste to transfer the resistive paste of low resistivity onto the insulating layer 113 and then sintering the paste. Specifically, at least one of silver (Ag) and gold (Au) is contained in the low-resistivity resistive paste for fabricating the temperature measuring electrode 153 . In one alternative embodiment, the resistive paste from which temperature measuring electrode 153 is made includes Ag, Au, gold alloys, or silver alloys. Of course, the low resistivity resistive paste from which the temperature measuring electrode 153 is made also contains a binder, for example an inorganic binder. As can be seen, the binder percentage in the low resistivity resistor paste is greater than the binder percentage in the high resistivity resistor paste. Of course, the method of manufacturing the temperature measuring electrode 153 is not limited to this, and other methods commonly used in the field may be used.

In this embodiment, the sheet resistance of the temperature measuring electrode 153 does not exceed 5 mΩ/□. Furthermore, the sheet resistance of the temperature measuring electrode 153 is 1 mΩ/□ to 5 mΩ/□. The resistance of temperature measuring electrode 153 is much smaller than the resistance of temperature measuring portion 151 . For example, the resistance of the temperature measuring electrode 153 is 0.1Ω to 0.5Ω. In this way, the temperature measuring electrode 153 hardly generates heat when energized, so that the temperature of the mounting seat 101 can be lowered and power consumption can be saved. Referring to FIG. 2, a lead wire 140 is further provided on the temperature measuring electrode 153, and the lead wire 140 on the temperature measuring electrode 153 is used to electrically connect the power supply and the temperature measuring electrode 153. , the lead wire 140 is also provided on the heating electrode 133, the lead wire 140 on the heating electrode 133 is used to electrically connect the power source and the heating electrode 133, and the lead wire on the temperature measuring electrode 153 is used. 140 and lead wiring 140 on heating electrode 133 are provided with a space therebetween.

Specifically, the extraction wiring 140 is welded onto the heating electrode 133, the extraction wiring 140 is also welded onto the temperature measuring electrode 153, and the welding point between the temperature measuring electrode 153 and the extraction wiring 140 and the heating electrode 133 and the extraction The welding points with the wiring 140 are all located within the mounting seat 101, and the plane on which the lead wiring 140 on the temperature measuring electrode 153 is located and the plane on which the lead wiring 140 of the heating electrode 133 is located are not the same plane. . The welding point between the temperature measuring electrode 153 and the lead wire 140 is closer to the bottom surface 115 of the substrate 110 than the weld point between the heating electrode 133 and the lead wire 140 . In the embodiment shown in FIG. 2, the lead wire 140 of the temperature measuring electrode 153 and the heating electrode 133 are located on different surfaces of the insulating layer 113 away from the main body 111, and part of the temperature measuring electrode 153 is The temperature measuring electrode 153 is located on the side of the insulating layer 113 away from the main body 111 , the other part is located on the side of the insulating layer 113 close to the main body 111 , and the temperature measuring electrode 153 is located on the side of the insulating layer 113 close to the main body 111 . is connected to the lead-out wiring 140 via the electrode located at . In this embodiment, the number of heating electrodes 133 is two, the number of temperature measuring electrodes 153 is two, and the number of lead wires is four. is connected to each lead wire.

In some embodiments, the heating element 100 further includes a protective layer 170 configured to protect the heating portion 131 , the temperature measuring portion 151 and the temperature measuring electrode 153 located in the heating region 119 . Specifically, the protective layer 170 is positioned within the heat generating region 119 and covers the heat generating portion 131 , all the temperature measuring portions 151 and part of the temperature measuring electrodes 153 . In this embodiment, protective layer 170 is a glaze layer. When the protective layer 170 is a glaze layer, the surface of the glaze layer is smooth, so the protective layer 170 protects the parts of the heating region 119 and prevents the heating element 100 from sticking smoke oil. , making the insertion and withdrawal of the object to be heated smoother. In other embodiments, the material of protective layer 170 is not limited to glaze and may be other materials.

In one alternative embodiment, the thickness of protective layer 170 is between 0.1 mm and 0.5 mm. Naturally, if the thickness of the protective layer 170 is greater than 0.5 mm, it is disadvantageous in conducting the heat of the heat generating portion 131 to the object to be heated. If the thickness of the protective layer 170 is less than 0.1 mm, the protective layer 170 may be easily damaged or peeled off.

In this embodiment, the base 111a has a substantially cylindrical shape, the diameter of the base 111a is 2 mm to 5 mm, the length of the base 111a is 15 mm to 25 mm, the length of the main body 111 is 18 mm to 30 mm, and the length of the base 111 a is 18 mm to 30 mm. The length of the heating portion 131 in the longitudinal direction of 111a is 8 mm to 12 mm, and the width of the heating wire 131a is 0.5 mm to 1.5 mm. In an alternative embodiment, the diameter of the base 111a is 3 mm, the length of the base 111a is 16 mm, the length of the main body 111 is 20 mm, and the length of the heating portion 131 in the longitudinal direction of the base 111a is 10 mm, and the width of the heating wire 131a is 0.8 mm. Of course, in other embodiments, the sizes of the main body 111, base 111a, and heating wire 131a are not limited to the above, and can be adjusted as necessary.

Referring to FIG. 3, the area from the side of the heating electrode 133 close to the heating portion 131 to the bottom surface 115 of the substrate 110 is an electrode installation area 117 . The mounting seat 101 is positioned within the electrode installation area 117 . 4 to 7, the mounting seat 101 is used to fix the heating element 100, the mounting seat 101 has a hollow structure, the mounting seat 101 is fixedly connected to the base 110 of the heating element 100, and the A connection point between the seat 101 and the base 110 is located on the side of the heating electrode 133 close to the bottom surface 115 . By providing the connection point between the mounting seat 101 and the base 110 on the side of the heating electrode 133 close to the bottom surface 115, the portion of the mounting base 101 that contacts the base 110 is separated from the heating portion 131 and close to the bottom surface 115, To reduce the influence of the heat of the heat generating part 131 on the mounting seat 101 and improve the life of the mounting seat 101.例文帳に追加More specifically, the connection point between the mounting seat 101 and the base 110 is positioned between the heating electrode 133 and the bottom surface 115 , and the connection position between the mounting seat 101 and the base 110 is located between the heating electrode 133 and the bottom surface 115 . A space is provided between them, or the connection point between the mounting seat 101 and the base 110 is located on the side close to the bottom surface 115 and adjacent to the heating electrode 133 . Further, the locking portion or the contacting portion between the mounting seat 101 and the base 110 is located between the heating electrode 133 and the bottom surface 115, and the locking portion or the contacting portion between the mounting seat 101 and the base 110 generates heat. A space is provided between the electrode 133 and the bottom surface 115 , or a locking portion or abutting portion between the mounting seat 101 and the base 110 is located on the side close to the bottom surface 115 and adjacent to the heating electrode 133 . there is

Referring to FIG. 7 , the heat generating assembly 10 further includes a locking member 105 , the locking member 105 is fitted onto the base 110 and fixed to the base 110 , and the locking member 105 is positioned within the mounting seat 101 to be mounted. It is locked to the inner wall of the seat 101 . The fitting between the locking member 105 and the mounting seat 101 fixes the heating element 100 in the mounting seat 101 . In the embodiment shown in FIG. 7, the locking member 105 is positioned between the connection point between the heating electrode 133 and the lead wire and the connection point between the temperature measuring electrode 153 and the lead wire. is partially housed in the mounting seat. Of course, in other embodiments, the locking member 105 may be positioned at other positions within the mounting seat 101, for example, the locking member 105 may be positioned between the temperature measuring electrode 153 and the bottom surface 115. do. As a matter of course, the locking member 105 has a through-hole or groove that facilitates the insertion of the lead wire 140 . Optionally, locking member 105 is a flange. In some embodiments, locking member 105 and base 110 of heating element 100 are integrally molded. Of course, in other embodiments, locking member 105 may be omitted. If locking member 105 is omitted, heating element 100 may be mounted on mounting seat 101 with an interference fit. As a matter of course, the contact portion when the substrate 110 and the mounting seat 101 are tightly fitted is located on the side close to the bottom surface of the heating electrode 133 .

Of course, in other embodiments, temperature measuring electrode 153 may be completely housed within mounting seat 101 . As will be understood, in some other embodiments, the connection point between the mounting seat 101 and the base 110 may be located on the side of the heating electrode 133 close to the heating portion 133 or on the heating electrode 133 . In this case, the mounting seat 101 is closer to the heat generating portion 131 and is more susceptible to heat, resulting in a shorter life.

4 and 5, the mounting seat 101 includes a mounting base 101a and a mounting cover 101b. The mounting base 101a and the mounting cover 101b may be movably connected or may be fixedly connected. Alternatively, the mounting seat 101 and the mounting cover 101b are locked. Needless to say, the mounting base 101a and/or the mounting cover 101b are provided with through holes through which the lead wires 140 are inserted, and the mounting seat 101 and/or the mounting cover 101b are provided with a plurality of lead wire grooves. The lead wires 140 are arranged in different lead wire grooves so as to be spaced apart from each other. In the embodiment shown in FIG. 5, there is no heat generating portion 131 inside the mounting seat 101, so that the influence of the heating element 100 on the mounting seat 101 is further reduced. Of course, in some other embodiments, a portion of the heat-generating portion 131 may be located within the mounting seat 101 .

Referring to FIG. 7 , the heat generating assembly 10 further includes a sealing member 103 , the sealing member 103 is fitted on the heat generating element 100 , and the sealing member 103 is positioned at the connecting portion between the heat generating portion 131 and the heat generating electrode 133 . there is In the sealing member 103, a product formed after heating (for example, an atomized liquid generated by heating a cigarette or a smoke bomb) flows along the surface of the heating element 100 into the mounting seat 101, and the mounting seat 101 It is used to prevent the internal electrodes from being affected. Alternatively, the sealing member 103 abuts the mounting seat 101 and is partially accommodated within the mounting seat 101 . In one alternative embodiment, the material of the sealing member 103 is silica gel. Of course, in other embodiments, sealing member 103 may be of other materials.

Alternatively, the sealing member 103 may be loosely fitted to the heating element 100 so that the atomized liquid generated by heating the cigarette or smoke bomb is less likely to enter the mounting seat 101 through the gap. For example, there is a gap of 0.5 mm to 2 mm between the sealing member 103 and the heating element 100 . In the range of this gap, it is difficult for the atomized liquid generated by heating the cigarette or the smoke bomb to enter the mounting seat 101 through the gap. Furthermore, there is a 1 mm gap between the sealing member 103 and the heating element 100 . As will be appreciated, in some embodiments the sealing member 103 may be omitted. When the sealing member 103 is omitted, a design can be adopted in which the mounting seat 101 also has the function of the sealing member 103 . For example, for one end of the mounting seat 101 near the connecting portion between the heating electrode 133 and the heating portion 131, it is possible to adopt a design that prevents the product formed after heating from flowing into the mounting seat 101. can. Of course, a protective member may be provided inside the mounting seat 101 to protect the electrodes.

8-12, the present invention further provides a heating assembly 20 in another embodiment. The configuration of the heat-generating assembly 20 is substantially similar to that of the heat-generating assembly 10 . The heating assembly 20 includes a mounting seat 201 , a heating element 200 mounted on the mounting seat 201 and a sealing member 203 , the sealing member 203 being fitted on the heating element 200 and adjacent to the mounting seat 201 . The heating element 200 includes a substrate 210, and a heating circuit 230 and a temperature measurement circuit 250 provided on the substrate 210 and independent of each other, the heating circuit 230 including a heating portion 231 and a heating electrode 233, The heat generating portion 231 forms a heat generating region on the substrate 210, the heat generating electrode 233 includes a first electrode 233a and a second electrode 233b, and the temperature measuring circuit 250 includes a temperature measuring portion 251 and a temperature measuring electrode 253. , the temperature measuring part 251 is located in the heat generating region away from the mounting seat 201, the temperature measuring electrode 253 extends from the heat generating region into the mounting seat 201, and the temperature measuring electrode 253 is located in the third It includes an electrode 253a and a fourth electrode 253b. Heat-generating assembly 20 differs from heat-generating assembly 10 in that substrate 210 is in the form of a short sheet. Specifically, the main body 211 has a short sheet shape, the main body 211 has a first protrusion 211c and a second protrusion 211d, and the first protrusion 211c is spaced apart from the second protrusion 211d. A first protrusion 211 c is close to the heating electrode 233 and a second protrusion 211 d is close to the bottom surface of the substrate 210 . The mounting base 201a of the mounting seat 201 is provided with a slide groove 201c, and the mounting cover 201b is provided with a slide block 201d. The mounting base 201a is movably connected to the mounting cover 201b by fitting the slide groove 201c into the slide block 201d. The mounting base 201a is further provided with a locking groove 201f. The locking groove 201f is located on the side of the heating electrode 233 that is close to the bottom surface of the base 210. is locked in the locking groove 201f so as to be fixedly connected to the . Further, the mounting base 201a is further formed with guide protrusions to facilitate the mounting of the heating element 200. As shown in FIG. An insulating layer 213 is provided on each of the upper and lower surfaces of the main body 211, a protective layer 270 is further provided on the insulating layer 213 adjacent to the lower surface of the main body 211, and the heating electrode 233 and the temperature measuring electrode 253 are coplanar. It is in.

An embodiment of the present invention further provides a heating device comprising any one of the heat generating assemblies described above.

<Specific example>
Hereinafter, a detailed description will be given in combination with specific examples. In the following examples, ingredients other than unavoidable impurities are not included unless otherwise specified. Reagents and equipment used in the examples are those commonly selected in the art unless otherwise noted. Experimental methods for which specific conditions are not specified in the examples are carried out according to usual conditions, such as those described in literatures, books, or methods recommended by manufacturers.

Example 1
The configuration of the heat generating assembly of Example 1 is shown in FIG. Here, the base of the heating element is zirconia ceramic, the diameter is 3 mm, the length of the base is 16 mm, the thickness of the insulating layer wound on the base is 0.3 mm, and the length of the base is 0.3 mm. The length of the heating wire is 10 mm, the width of the heating wire is 0.8 mm, the maximum length of the heating wire formed in the width direction of the base is 5.06 mm, and the temperature measurement wire in the longitudinal direction of the base has a length of 4 mm, and the distances from the temperature measuring wire to each of the two exothermic wires are equal. The resistance of the heating part at normal temperature is 1Ω, the sheet resistance of the heating part is 100mΩ/□, the main material of the heating part is Ni, the resistance of the temperature measuring part at normal temperature is 10Ω, and the temperature measurement The sheet resistance of the part is 150 mΩ/□, the main material of the temperature measuring part is AgPb, and both the temperature measuring electrode and the heating electrode are electrodes made of silver paste.

FIG. 13 shows the results of the early stage isothermal stability of the exothermic assembly of Example 1 tested by infrared thermometry. In FIG. 13, the abscissa is time, the horizontal length of each grid is 15 s, and the ordinate is temperature (° C.). As can be seen from FIG. 13, the temperature measuring unit of the heating element of Example 1 can accurately reflect the real-time temperature of the heating element. After the maximum temperature of the heating element reached 345°C with a slight overshoot, the temperature gradually stabilized and reached 340°C. Reached. From this, it was found that, as described above, by providing the temperature measuring part in the heat generation region away from the electrode installation region, the problem that uniform control of the temperature of the heating element in the initial stage becomes difficult can be improved satisfactorily. .

Comparative example 1
The configuration of the heat generating assembly of Comparative Example 1 is substantially the same as that of Example 1, except that the temperature measuring portion 351 of Comparative Example 1 is provided over the entire heat generating region 319 as shown in FIG. is. The sheet resistance of the temperature measuring part 351 of Comparative Example 1 is the same as that of Example 1.

The early stage isothermal stability of the heating assembly of Comparative Example 1 is shown in FIG. In FIG. 15, the abscissa is time, the horizontal length of each grid is 15 s, and the ordinate is temperature (° C.). As can be seen from FIG. 15, when constant temperature control is performed on the heating element of Comparative Example 1, the temperature measurement unit 351 cannot reflect the real-time temperature of the heating element. After a shoot occurred and reached 362°C, the temperature gradually stabilized and reached 338°C, with a high temperature overshoot reaching about 24°C. Since this temperature overshoot varies greatly depending on the heating element itself, it becomes more difficult to uniformly control the temperature of the heating element in the initial stages of the mass production process.

Each technical feature of the above embodiments can be arbitrarily combined, and for the sake of brevity, not all possible combinations of each technical feature in the above embodiments have been described. Combinations of these technical features should be considered within the scope described herein unless inconsistent.

The above examples merely illustrate some embodiments of the invention and are described in more specificity and detail, but should not be construed as limiting the scope of the invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the concept of the present invention, which all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

10 heating element; 110 substrate; 111 main body; 113 insulating layer; 111a base; 111b tip; 115 bottom; Heating electrode; 131a Heating wire; 133a First electrode; 133b Second electrode; 150 Temperature measuring circuit; 151 Temperature measuring part; 153 Temperature measuring electrode; 101 mounting seat; 101a mounting base; 101b mounting cover; 103 sealing member; 105 locking member; 211 body; 211c first projection; 211d second projection; 213 insulating layer; 230 heating circuit; 250 temperature measuring circuit; 251 temperature measuring part; 253 temperature measuring electrode; 253a third electrode; 253b fourth electrode; 270 protective layer; 201 mounting seat; 201f locking groove; 201b mounting cover; 203 sealing member. 319 heat generation area; 351 temperature measuring part.

Claims (20)

a substrate having a bottom surface, the substrate being provided with a heating region and an electrode installation region adjacent to the heating region, the electrode installation region being provided closer to the bottom surface than the heating region;
A heat generating circuit provided on the substrate, the heat generating circuit including a heat generating portion and a heat generating electrode electrically connected to the heat generating portion, the heat generating portion being provided in the heat generating region, and the heat generating electrode comprising: a heating circuit provided in the electrode installation area;
A temperature measuring circuit provided on the substrate, the temperature measuring circuit being spaced apart from the heat generating circuit, and the temperature measuring circuit being electrically connected to the temperature measuring section and the temperature measuring section. a temperature measuring electrode, wherein the heat generation region includes a high temperature region, and the temperature measurement unit includes a temperature measurement circuit provided in the high temperature region,
A heating element characterized by: The high temperature region is spaced apart from the electrode installation region phase, and the temperature measuring electrode extends from the heat generating region to the electrode installation region, or the high temperature region is adjacent to the electrode installation region. and the temperature measuring electrode is provided completely within the electrode installation area,
The heating element according to claim 1, characterized by: The substrate has a columnar shape or a short sheet shape, and the electrode installation region and the heat generating region are arranged in the longitudinal direction of the substrate. The ratio of the total length of the heat generating region and the electrode installation region in is 1: (2 to 5),
The heating element according to claim 2, characterized by: A ratio of the length of the high-temperature region in the longitudinal direction of the base to the length of the heat-generating region in the longitudinal direction of the base is 1:(1.5 to 4).
The heating element according to claim 3, characterized by: The heating electrode includes a first electrode and a second electrode spaced apart from the first electrode, and the temperature measuring electrode includes a third electrode and the third electrode. and fourth electrodes spaced apart from each other, each of the first electrode, the second electrode, the third electrode, and the fourth electrode being connected to a lead wire. the wires are spaced apart from each other,
The heating element according to any one of claims 1 to 4, characterized in that: The heat generating portion is U-shaped, one end of the heat generating portion is electrically connected to the first electrode, the other end of the heat generating portion is electrically connected to the second electrode, and the temperature measuring is close to the U-shaped bottom of the exothermic portion, the temperature measuring portion is away from the opening formed by the ends of the exothermic portion; and/or
The temperature measuring portion is U-shaped, one end of the temperature measuring portion is electrically connected to the third electrode, and the other end of the temperature measuring portion is electrically connected to the fourth electrode. ,
The heating element according to claim 5, characterized in that: The exothermic part includes a plurality of exothermic wires provided at intervals, one end of each exothermic wire is electrically connected to the first electrode, and the other end of each exothermic wire is the second electrode. The temperature measuring part is located in the space between the U-shaped bottoms of the adjacent heating wires and is spaced from the heating wires,
The heating element according to claim 5, characterized in that: The heating part includes two heating wires spaced apart, the first electrode and the second electrode are both U-shaped, and part of the third electrode is , a portion of the fourth electrode located inside the first electrode, and a portion of the fourth electrode located inside the second electrode;
The heating element according to claim 7, characterized by: The heating part includes a heating wire, the heating region consists of the high temperature region and the non-high temperature region, the high temperature region and the non-high temperature region are both provided with a heating wire, and the heating wire in the high temperature region The width is smaller than the width of the heating line in the non-high temperature region,
9. The heating element according to any one of claims 1 to 4 and 6 to 8, characterized in that: The heating line includes an electrode segment, an intermediate segment and a top segment connected in sequence, the electrode segment being close to the heating electrode, the top segment being close to the temperature measuring part, and the electrode segment and the width of the top segment is greater than the width of the middle segment;
The heating element according to claim 9, characterized in that: The base has a columnar shape or a short sheet shape, the base includes a main body and an insulating layer positioned on the main body, the main body includes a base and a tip connected to the base, The tip extends away from the base, the cross-sectional width of the tip gradually narrows along the direction away from the base, and the insulating layer is wound around the base. wherein the heating circuit and the temperature measuring circuit are located on the insulating layer,
The heating element according to claim 1, characterized by: the base is a ceramic base or a stainless steel base, the insulating layer is a glass ceramic insulating layer or a low temperature ceramic insulating layer, and/or
The thickness of the insulating layer is 0.02 mm to 0.5 mm,
The heating element according to claim 11, characterized by: At room temperature, the resistance of the heating part is 0.5Ω to 2Ω, and/or
At room temperature, the resistance of the temperature measuring unit is 1.5Ω to 20Ω,
The heating element according to any one of claims 1 to 4, claims 6 to 8, and claims 10 to 12, characterized in that: The heat generating part is a positive temperature coefficient thermistor,
and/or the temperature measuring unit is a positive temperature coefficient thermistor,
and/or the sheet resistance of the heating portion is 20 mΩ/□ to 200 mΩ/□,
and/or the temperature measuring unit has a sheet resistance of 20 mΩ/□ to 200 mΩ/□,
and/or the heat generating portion contains at least one of nickel, silver, palladium, platinum and ruthenium,
and/or the temperature measuring unit contains at least one of nickel, silver, palladium, platinum and ruthenium,
The heating element according to any one of claims 1 to 4, claims 6 to 8, and claims 10 to 12, characterized in that: The temperature coefficient of resistance of the heat generating part is smaller than the temperature coefficient of resistance of the temperature measuring part,
15. The heating element according to claim 14, characterized in that: The material of the heat generating part is selected from one of a nichrome alloy, a tantalum alloy, a gold-chromium alloy, and a nickel-phosphorus alloy,
and/or the material of the temperature measuring part is selected from at least one of copper, nickel, manganese, and ruthenium,
The heating element according to claim 15, characterized by: The sheet resistance of the heating electrode does not exceed 5 mΩ/□, and the sheet resistance of the temperature measuring electrode does not exceed 5 mΩ/□.
The heating element according to any one of claims 1 to 4, claims 6 to 8, claims 10 to 12, and claims 15 to 16, characterized in that: The heating element further includes a protective layer covering the heating part, the temperature measuring part, and a part of the temperature measuring electrode,
The heating element according to claim 17, characterized by: A heating assembly comprising a mounting seat and a heating element mounted on the mounting seat, wherein the heating element is the heating element according to any one of claims 1 to 18.
A heat generating assembly, characterized by: A case and a heat generating assembly according to claim 19,
A heating device characterized by:

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