CN107148092B - Heater - Google Patents
Heater Download PDFInfo
- Publication number
- CN107148092B CN107148092B CN201710507322.9A CN201710507322A CN107148092B CN 107148092 B CN107148092 B CN 107148092B CN 201710507322 A CN201710507322 A CN 201710507322A CN 107148092 B CN107148092 B CN 107148092B
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- China
- Prior art keywords
- heating
- temperature protector
- substrate
- heater
- protective cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010438 heat treatment Methods 0.000 claims abstract description 129
- 230000001012 protector Effects 0.000 claims abstract description 104
- 239000000758 substrate Substances 0.000 claims description 59
- 230000001681 protective effect Effects 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 5
- 239000002577 cryoprotective agent Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
Abstract
The invention relates to the field of heating devices, and discloses a heater, wherein the heater comprises a heating plate (2), and a high-temperature protector (32) and a low-temperature protector (31) which are arranged on the heating plate (2), the high-temperature protector (32) is used for automatically disconnecting a power supply for heating the heating plate (2) when the temperature of the heating plate (2) is greater than or equal to a preset value T1, and the low-temperature protector (31) is used for automatically disconnecting the power supply for heating the heating plate (2) when the temperature of the heating plate (2) is greater than or equal to a preset value T2, wherein the preset value T1 is greater than the preset value T2. The technical scheme provided by the invention improves the use safety of the heater.
Description
Technical Field
The invention relates to the technical field of heating devices, in particular to a heater for a washing machine or a dish washer.
Background
The existing heaters used for washing products such as washing machines, dish washers and the like, especially for dish washers, mainly comprise pipeline heaters. The heater has the heating function on one hand and the temperature control function on the other hand.
The conductive wires of the pipeline heater are usually exposed outside, and certain potential safety hazards are brought after the conductive wires are electrified and heated. In addition, the outer side of the electric conduction wire of the heater can be wrapped by a plurality of metals with small heat conductivity or non-heat conductivity, so that the aim of reducing the surface temperature is fulfilled when the heater is installed in a washing product. However, after the power supply of the heater is turned off due to the metal wrapped on the outer side, the temperature of the conductive wire is reduced slowly, a certain cooling space is needed, and the purpose of accurately controlling the temperature cannot be achieved.
The pipe heater heats the liquid using a heating pipe, which has inconvenience in mounting the temperature protector. To mount the temperature protector, a thermally conductive sheet metal is typically placed around the heating conduit, the temperature protector is attached to the sheet, and a positioning member is mounted over the temperature protector. Therefore, the number of parts is increased, the pipeline heater is inconvenient to assemble and disassemble, and the cost is high.
In addition, the existing pipeline heater controls the heating temperature by using a temperature protector, wherein the temperature protector generally senses the temperature of the plate-shaped metal, and the temperature has a certain difference from the temperature of the heated fluid, so that the temperature protector is not accurate enough in controlling the temperature of the heated fluid; in addition, the design of the temperature protector in the pipeline heater is not reasonable enough, and the safety of the heater is not high when the heater is used.
Disclosure of Invention
The invention aims to solve the problem of low heating safety of a pipeline heater in the prior art, and provides a technical scheme capable of improving the heating safety of the heater.
In order to achieve the above object, the present invention provides a heater, wherein the heater includes a heating plate, and a high temperature protector and a low temperature protector mounted on the heating plate, the high temperature protector is configured to be automatically turned off to cut off a power supply for heating the heating plate when a temperature of the heating plate is greater than or equal to a preset value T1, and the low temperature protector is configured to be automatically turned off to cut off the power supply for heating the heating plate when the temperature of the heating plate is greater than or equal to a preset value T2, wherein the preset value T1 > the preset value T2.
Preferably, the low-temperature protector is a low-temperature resettable protector, and the low-temperature resettable protector is automatically closed to switch on the power supply for heating the heating plate when the temperature of the heating plate is lower than a preset value T3, wherein the preset value T3 is smaller than the preset value T2.
Preferably, the heating plate comprises a base plate and heating wires laid on the base plate, the base plate is used for conducting heat generated by the heating wires to liquid to be heated, and the high-temperature protector and the low-temperature protector are arranged on the surface of the base plate, on which the heating wires are laid, in series with the heating wires and staggered.
Preferably, the substrate comprises a metal plate and an insulating heat conducting layer laid on the metal plate, the heating wire is a thick film resistance wire, and the thick film resistance wire is laid on the insulating heat conducting layer to insulate the metal plate through the insulating heat conducting layer and conduct heat to the metal plate.
Preferably, the substrate further comprises another insulating and heat conducting layer laid out outside the thick film resistance wire to isolate the thick film resistance wire from the external environment.
Preferably, the heater further includes a protective cover mounted on the substrate such that a side of the substrate facing the protective cover is isolated from an external environment, and the high temperature protector and the low temperature protector are located between the protective cover and the substrate.
Preferably, the substrate is further provided with a connection post electrically connected to one end of the heating wire, and the protection cover is formed with an opening corresponding to the connection post for penetrating the connection post.
Preferably, the outer side of the protective cover is further provided with a terminal plate for electrically connecting the connecting post, and the terminal plate is provided with a connecting hole for penetrating the connecting post and a connecting end for electrically connecting a power supply wire.
Preferably, the protective cover is further formed with a positioning protrusion protruding outward for receiving and positioning the cryoprotectant.
Preferably, the low-temperature protector comprises two wiring terminals respectively penetrating out of the positioning protrusions; the heater also comprises a wire, wherein two ends of the wire are respectively and electrically connected with the other end of the heating wire and a wiring terminal of the low-temperature protector; and a threading hole for threading the lead is formed in the protective cover.
Preferably, the heater further comprises a pipe, one end of the pipe is located outside the protective cover, and the other end of the pipe extends through the protective cover to enable the pipe to drain liquid from one end of the pipe located outside the protective cover to a side of the substrate where the heating wire is not applied.
Preferably, the substrate is an annular substrate coaxially arranged with the pipeline, and the heating wire is coiled on the substrate along the circumferential direction of the annular substrate.
Preferably, the pipeline is a cylindrical pipeline, and the substrate is a circular annular substrate.
The technical scheme provided by the invention has the following beneficial effects:
the heater provided by the invention is provided with the heating plate, the high-temperature protector and the low-temperature protector which are arranged on the heating plate, the on-off of the power supply of the heating plate is controlled by the high-temperature protector and the low-temperature protector according to different heating temperatures, when the low-temperature protector cannot normally act due to faults, for example, the temperature of the heating plate is continuously raised to trigger the high-temperature protector to act, and the power supply of the heating plate is cut off by the high-temperature protector, so that the double protection function is realized, and the use safety of the heater is improved.
Drawings
Fig. 1 is a schematic perspective view of a heater according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of the protective cover in FIG. 1;
fig. 3 is a schematic perspective view of the other components of fig. 1 except for the protective cover.
Description of the reference numerals
1-a protective cover; 2-heating plate; 3-a temperature protector; 4-wiring terminals; 5-the ground end of the heating plate; 6-conducting wires; 12-positioning protrusions; 13-opening holes; 14-through holes; 21-heating wires; 22-piping; 31-a low temperature protector; 32-a high temperature protector; 41-terminal pieces; 42-connecting the columns.
Detailed Description
In the present invention, unless otherwise specified, terms such as "upper, lower, left, and right" are used to generally refer to the upper, lower, left, and right sides of the drawings. "inner and outer" means inner and outer relative to the contour of the component itself.
Referring to fig. 1-3, an embodiment of the present invention provides a heater, wherein the heater includes a heating plate 2, and a high temperature protector 32 and a low temperature protector 31 mounted on the heating plate 2, the high temperature protector 32 is configured to be automatically turned off to cut off a power supply for heating the heating plate 2 when a temperature of the heating plate 2 is greater than or equal to a preset value T1, and the low temperature protector 31 is configured to be automatically turned off to cut off the power supply for heating the heating plate 2 when the temperature of the heating plate 2 is greater than or equal to the preset value T2, wherein the preset value T1 > the preset value T2. Specifically, the heater is powered on by the power supply of the heating plate 2 when in use. The heating plate 2 generates heat when energized, which heat can be used for example to heat a liquid. In order to realize the control of the heating temperature of the heater and improve the use safety of the heater, the heater is required to be provided with a temperature protection device so as to automatically disconnect the power supply of the heater when the temperature is higher than a certain set value, thereby playing a role in controlling the temperature and preventing potential safety hazards caused by overhigh temperature of the heating plate 2. The existing heater is unreasonable in design of a temperature protection device, the phenomenon that the heating temperature of the heater is too high due to failure of the temperature protection device often occurs, temperature control is inaccurate, and safety is required to be improved. In order to solve the above technical problems, the heater provided in this embodiment has two temperature protectors 3 with different temperature protection values, namely, a high temperature protector 32 and a low temperature protector 31, when the low temperature protector 31 cannot normally operate due to, for example, a fault when the heater plate 2 is electrified and heated, the temperature of the heater plate 2 will continue to rise to trigger the high temperature protector 32 to operate, and the power supply of the heater plate 2 is cut off through the high temperature protector 32, so that the dual protection function can be achieved, and the use safety of the heater is improved.
In a preferred embodiment, in order to automatically control the heating temperature of the heater within a preset temperature range, the low temperature protector 31 is a low temperature resettable protector that is automatically closed to turn on the power supply for heating the heating plate 2 when the temperature of the heating plate 2 is lower than a preset value T3, wherein the preset value T3 < the preset value T2. In this way, the heater can stably control the temperature of the heating plate 2 between the preset value T2 and the preset value T3 by the automatic opening and closing functions of the cryoprotectant 31 in the case of the energization heating.
The preset value T1 is related to a specific type of the high temperature protector 32, and the preset value T2 and the preset value T3 are related to a specific type of the low temperature protector 31. In a specific embodiment, the value range of the preset value T1 may be 140-180 ℃, for example; the value range of the preset value T2 can be 70-90 ℃ for example; the preset value T3 can be in a value range of 40-60 ℃ for example. The high temperature protector 32 may be, for example, a fuse such as a NEC SCHOTT SEFUSE series thermal fuse having a fusing temperature of 175 ℃. The low-temperature protector 31 may be a KSD301 series normally-closed temperature control switch, for example, and the open temperature thereof may be 85 ℃, and the reset-close temperature thereof may be 55 ℃ after the open.
The heating plate 2 may have various specific structures, in a preferred embodiment, the heating plate 2 includes a substrate, and a heating wire 21 laid on the substrate, in use, the heating wire 21 is connected to a power supply for generating heat when being electrified, a side of the substrate, on which the heating wire 21 is not laid, may be in contact with a liquid to be heated for conducting heat generated by the heating wire 21 to the liquid to be heated, and the high temperature protector 32 and the low temperature protector 31 are mounted on a surface of the substrate, on which the heating wire 21 is laid, and are connected in series to the heating wire 21, so that the power supply for the heating wire 21 can be turned on or off by being opened or closed by itself. In order to improve the temperature sensing accuracy of the high temperature protector 32 and the low temperature protector 31, the high temperature protector 32 and the low temperature protector 31 are staggered with the heating wire 21, that is, the high temperature protector 32 and the low temperature protector 31 are not contacted with the heating wire 21, but are contacted with the substrate, compared with the heating element heating wire 21, the temperature of the substrate is closer to the temperature of the liquid to be heated, so that the temperature sensing of the high temperature protector 32 and the low temperature protector 31 is more accurate, the temperature of the liquid to be heated can be controlled more accurately, and the temperature control accuracy of the heater is improved.
In a specific embodiment, in order to improve the compactness of the heating plate 2 and reduce the volume of the heating plate 2, the substrate includes a metal plate, such as a stainless steel metal plate, and an insulating heat conducting layer laid on the metal plate, and the heating wire 21 is a thick film resistance wire laid on the insulating heat conducting layer to insulate the metal plate through the insulating heat conducting layer and conduct heat to the metal plate. The insulating and heat conducting layer can be ceramic, glass or composite film, etc., and can be coated on the surface of the metal plate, and the thickness of the insulating and heat conducting layer can be only 1-5 mu m, for example. The thick film resistor wire is formed by mixing metal oxide and glass glaze adhesive into slurry and sintering at high temperature, and the thickness of the thick film resistor wire can be 1-3 mu m. By applying the thick film resistor wire to the heating wire 21 to the metal plate, the heating plate 2 can be made more compact in structure and smaller in volume.
Preferably, in order to maintain insulation between the thick film resistor wire and other components so as to improve the use safety of the heater, the substrate further comprises another insulating heat conducting layer laid outside the thick film resistor wire, and the insulating heat conducting layer can isolate the thick film resistor wire from the external environment so as to insulate the thick film resistor wire from the other components, improve the use safety of the heater and better protect the thick film resistor wire. The material of the other insulating heat conducting layer can be the same as the material of the insulating heat conducting layer coated on the surface of the metal plate, and is ceramic, glass or a composite film.
When the heating plate 2 is processed, a layer of insulating heat-conducting material with the thickness of 2 mu m is coated on the upper surface of a stainless steel plate, a layer of thick film resistance wire with the thickness of 2 mu m is attached to the insulating material, and the same insulating heat-conducting layer with the thickness of 2 mu m is coated outside the thick film resistance wire.
In a preferred embodiment, in order to improve the safety of the heater in use, the heater further comprises a protective cover 1, the protective cover 1 is mounted on the substrate such that a side of the substrate facing the protective cover 1 is isolated from the external environment, thereby improving the safety of the heater in use, and a side of the substrate facing away from the protective cover 1 is contacted with the liquid to be heated to heat the liquid. In addition, an accommodating space is formed between the protective cover 1 and the substrate for accommodating the low temperature protector 31 and the high temperature protector 32. That is, the high temperature protector 32 and the low temperature protector 31 are located between the protective cover 1 and the substrate.
Generally, the low temperature protector 31 is larger than the high temperature protector 32, and is not convenient to install. In order to reliably position the low temperature protector 31 and to improve the structural compactness of the heater, the protective cover 1 is formed with a positioning protrusion 12 protruding outward, and the shape of the positioning protrusion 12 is adapted to the shape of the low temperature protector 31 for receiving and positioning the low temperature protector 31.
Taking the low-temperature protector 31 as a cylinder, two connecting terminals extending outwards along the direction parallel to the axis of the cylinder are arranged on two sides of the end of the cylinder, the positioning protrusion 12 is in the shape of a hollow cylinder, the inner diameter of the hollow cylinder is larger than or equal to the outer diameter of the low-temperature protector 31, and two connecting terminals corresponding to the low-temperature protector 31 on two sides of the outer end of the hollow cylinder are provided with connecting terminal avoiding openings. Preferably, a groove capable of positioning the wiring terminal is formed at the wiring terminal avoidance port of the positioning boss 12, and when the low temperature protector 31 is mounted, the wiring terminal thereof is accommodated in the groove, and the end face of the low temperature protector 31 having one end of the wiring terminal is attached to the inner side face of the outer end portion of the positioning boss 12, and the end face of the other end of the low temperature protector 31 is attached to the substrate of the heating plate 2, thereby realizing stable mounting of the low temperature protector 31.
Both the high temperature protector 32 and the low temperature protector 31 are connected in series with the heating wire 21. The high temperature protector 32 may be laid on an outer edge portion of the substrate, for example, and both ends of the high temperature protector 32 may be connected in series to the heating wire 21 by welding. The end of the heating wire 21 needs to be electrically connected to the low temperature protector 31, in order to connect the low temperature protector 31 and the heating wire 21 in series, a threading hole for threading the wire 6 is further formed on the protective cover 1, the wire 6 extends through the threading hole, one end is electrically connected to the end of the heating wire 21, for example, by welding, and the other end is electrically connected to a connection terminal of the low temperature protector 31.
When the heater is used, the heater wire 21 is required to be connected with an external power supply, the positive electrode and the negative electrode of the power supply respectively draw out two power supply wires, each power supply wire is provided with a terminal, the terminal of one power supply wire is electrically connected with the other wiring terminal of the low-temperature protector 31 in an opposite-plug manner, and the terminal of the other power supply wire is connected with the head end of the heater wire 21, namely the terminal plate 41 in an opposite-plug manner.
In order to improve the convenience of connection between the power supply line and the heating wire 21, the substrate is provided with a terminal 4 electrically connected to, for example, one end of the heating wire 21 by welding, the terminal 4 includes a connection post 42, an opening 13 for penetrating the connection post 42 is formed on the protective cover 1 corresponding to the connection post 42, and when the power supply line is connected, the power supply line can be easily connected by electrically connecting the connection post 42 with the terminal of the external power supply line, because the connection post 42 has a large size and extends out of the protective cover 1.
More preferably, in order to further improve the connection convenience between the heating wire 21 and the power supply line, the terminal 4 further includes a terminal piece 41 disposed at the outer side of the protective cover 1 for electrically connecting the connection post 42, and the terminal piece 41 is formed with a connection hole for penetrating the connection post 42 and a connection terminal for plugging to electrically connect the power supply line. Specifically, the cross section of the terminal plate 41 may be, for example, an "L" shape, and the connection post 42 may be inserted through the connection hole of the terminal plate 41 in an interference manner to achieve electrical connection with the terminal plate 41. After the terminal plate 41 is provided, a terminal of the power supply line may be inserted at a connection end of the terminal plate 41 to achieve electrical connection with the terminal plate 41, thereby providing the operating power for the heating wire 21.
In a preferred embodiment, to achieve heating of the liquid, the heater further comprises a tube 22, one end of the tube 22 being located outside the protective cover 1, the other end extending through the protective cover 1 to enable the tube 22 to drain the liquid from the end of the tube 22 located outside the protective cover 1 to the side of the substrate where the heating wire 21 is not applied. Specifically, the substrate may be, for example, an annular plate having a central through hole, the protection cover 1 is an annular protection cover 1 having a central through hole 14, the pipe 22 extends through the central through hole 14 of the annular protection cover 1 and is tightly fitted with the annular protection cover 1, that is, the pipe 22 and the annular protection cover 1 are in contact with each other without a gap, and the other end of the pipe 22 may be, for example, fixed at and in communication with the central through hole of the substrate. In addition, the pipe 22 is also required to be connected to the substrate in a sealing manner, such as by soldering, i.e. there is no gap between the substrate and the pipe 22, so as to prevent backflow of the liquid. When heating the liquid, the liquid flows in from the upper inlet of the pipe 22 and flows out from the lower outlet of the pipe 22, and the liquid to be heated is heated by contacting the surface of the substrate on which the heating wire 21 is not applied.
In a preferred embodiment, in order to improve the heating uniformity of the heating plate 2, the substrate is an annular substrate coaxially disposed with the pipe 22, and the heating wire 21 is wound around the substrate along the circumferential direction of the annular substrate. For example, by winding the heating wires 21 around the base plate at equal radial intervals, a more uniform distribution of the heating wires 21 over the base plate can be achieved, thereby achieving a more uniform heating of the liquid.
In addition, referring to fig. 3, a grounding end 5 protruding radially outwards is further formed at the outer edge portion of the substrate. When the heater is electrified for use, the grounding ground is grounded, so that the use safety of the heater is improved.
Further, the substrate may be a circular ring-shaped substrate, and the pipe 22 may be a cylindrical pipe 22, so that the substrate and the pipe 22 are manufactured and installed, and meanwhile, as the inner cavity surface of the cylindrical pipe 22 is a cylindrical surface, dead angles of the inner space of the pipe can be reduced, resistance to liquid can be reduced in the flowing direction of the liquid, and the liquid is convenient to convey.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. The technical solution of the invention can be subjected to a plurality of simple variants within the scope of the technical idea of the invention. Including the various specific features being combined in any suitable manner. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (11)
1. A heater for a washing machine or a dishwasher, the heater comprising a heating plate (2), and a high temperature protector (32) and a low temperature protector (31) mounted on the heating plate (2), the high temperature protector (32) being configured to automatically turn off a power supply for heating the heating plate (2) when a temperature of the heating plate (2) is greater than or equal to a preset value T1, the low temperature protector (31) being configured to automatically turn off the power supply for heating the heating plate (2) when the temperature of the heating plate (2) is greater than or equal to a preset value T2, wherein the preset value T1 > the preset value T2, so that the power supply for the heating plate (2) is turned off by the high temperature protector (32) when the low temperature protector (31) is not able to operate normally;
the heating plate (2) comprises a base plate and heating wires (21) laid on the base plate, wherein the base plate is used for conducting heat generated by the heating wires (21) to liquid to be heated, and the high-temperature protector (32) and the low-temperature protector (31) are arranged on the surface of the base plate, on which the heating wires (21) are laid; the high-temperature protector (32) and the low-temperature protector (31) are connected with the heating wire (21) in series, the high-temperature protector (32) is laid on the outer edge part of the substrate, and the tail end of the heating wire (21) is electrically connected with the low-temperature protector (31);
the heater further comprises a pipeline (22), and the substrate is an annular substrate coaxially arranged with the pipeline (22); when heating the liquid, the liquid flows in from the upper inlet of the pipeline (22), flows out from the lower outlet of the pipeline (22), and contacts and heats the liquid to be heated through the surface of the substrate on which the heating wire (21) is not coated;
the heater further comprises a protective cover (1), the protective cover (1) is arranged on the substrate so that one surface of the substrate facing the protective cover (1) is separated from the external environment, and the high-temperature protector (32) and the low-temperature protector (31) are positioned between the protective cover (1) and the substrate;
the base plate is also provided with a connecting column (42) electrically connected to one end of the heating wire (21), and an opening (13) for penetrating the connecting column (42) is formed on the protective cover (1) corresponding to the connecting column (42);
the protective cover is characterized in that a terminal plate (41) for electrically connecting the connecting posts (42) is further arranged on the outer side of the protective cover (1), and a connecting hole for penetrating the connecting posts (42) and a connecting end for electrically connecting a power supply line are formed in the terminal plate (41).
2. The heater according to claim 1, characterized in that the low temperature protector (31) is a low temperature resettable protector that automatically closes to switch on the power supply that heats the heating plate (2) when the temperature of the heating plate (2) is below a preset value T3, wherein the preset value T3 < the preset value T2.
3. The heater according to claim 1, characterized in that the high temperature protector (32) and the low temperature protector (31) are in series and staggered with respect to the heating wire (21).
4. A heater according to claim 3, wherein the substrate comprises a metal plate and an insulating heat conducting layer applied to the metal plate, the heating wire (21) being a thick film resistance wire applied to the insulating heat conducting layer to insulate the metal plate from the insulating heat conducting layer and conduct heat to the metal plate.
5. The heater of claim 4, wherein said substrate further comprises another insulating thermally conductive layer applied over said thick film resistive wire to isolate said thick film resistive wire from the external environment.
6. The heater according to claim 1, wherein the protective cover (1) is further formed thereon with a positioning protrusion (12) protruding outward for receiving and positioning the cryoprotectant (31).
7. The heater according to claim 6, characterized in that the cryoprotector (31) comprises two terminals that respectively protrude outside the positioning projection (12); the heater also comprises a wire (6), wherein two ends of the wire (6) are respectively and electrically connected with the other end of the heating wire (21) and a wiring terminal of the low-temperature protector (31); the protective cover (1) is also provided with a threading hole for threading the lead (6).
8. A heater according to claim 1, characterized in that one end of the tube (22) is located outside the protective cover (1) and the other end extends through the protective cover (1) to such an extent that the tube (22) is able to drain liquid from the end of the tube (22) located outside the protective cover (1) to the side of the substrate where the heating wire (21) is not applied.
9. The heater according to claim 8, wherein the substrate is an annular substrate coaxially disposed with the pipe (22), and the heating wire (21) is wound around the substrate along a circumferential direction of the annular substrate.
10. The heater of claim 9, wherein the tube (22) is a cylindrical tube (22) and the substrate is a circular annular substrate.
11. A heater according to claim 9, wherein the outer edge portion of the base plate is formed with a grounding end (5) protruding radially outwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710507322.9A CN107148092B (en) | 2017-06-28 | 2017-06-28 | Heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710507322.9A CN107148092B (en) | 2017-06-28 | 2017-06-28 | Heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107148092A CN107148092A (en) | 2017-09-08 |
| CN107148092B true CN107148092B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710507322.9A Active CN107148092B (en) | 2017-06-28 | 2017-06-28 | Heater |
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| CN (1) | CN107148092B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989650B (en) * | 2018-08-31 | 2020-07-03 | 信利光电股份有限公司 | A heating accessory and shooting equipment for shooting equipment |
| CN112992717B (en) * | 2019-12-13 | 2024-02-06 | 沈阳芯源微电子设备股份有限公司 | Temperature protection device based on ceramic heating plate heating system |
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| JP2013235759A (en) * | 2012-05-10 | 2013-11-21 | Sanden Corp | Heating device |
| CN105526702A (en) * | 2014-10-21 | 2016-04-27 | 布莱克曼两合公司 | Heating system component and method for producing same |
| CN105545756A (en) * | 2015-12-17 | 2016-05-04 | 广东威灵电机制造有限公司 | Centrifugal pump |
| CN205398985U (en) * | 2016-02-24 | 2016-07-27 | 贝克电热科技（深圳）有限公司 | Domestic appliance control by temperature change connection structure |
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| CN105526702A (en) * | 2014-10-21 | 2016-04-27 | 布莱克曼两合公司 | Heating system component and method for producing same |
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| CN205398985U (en) * | 2016-02-24 | 2016-07-27 | 贝克电热科技（深圳）有限公司 | Domestic appliance control by temperature change connection structure |
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