CN111479339A - Heating element with controllable heating efficiency - Google Patents
Heating element with controllable heating efficiency Download PDFInfo
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- CN111479339A CN111479339A CN202010415609.0A CN202010415609A CN111479339A CN 111479339 A CN111479339 A CN 111479339A CN 202010415609 A CN202010415609 A CN 202010415609A CN 111479339 A CN111479339 A CN 111479339A
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- heating
- heating element
- power density
- outlet end
- power
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- 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
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
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- 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
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
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- Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
Abstract
The invention discloses a heating element with controllable heating efficiency, which comprises a base material, an insulating layer arranged on the base material and a plurality of sections of heating resistors with different power densities arranged on the insulating layer, wherein the distribution trend of the power densities of the heating resistors on the insulating layer is that the power densities of the heating resistors are gradually reduced from a water inlet end of the heating element to a water outlet end or a steam outlet end of the heating element. The invention changes the power density distribution of the heating element from the water inlet end to the water outlet end or the steam outlet end, and further adjusts the temperature distribution of the heating element in the working state, so that the surface temperature of the heating element is more uniform, and the service life of the heating element is prolonged.
Description
Technical Field
The invention belongs to the technical field of heating elements, and particularly relates to a heating element with controllable heating efficiency.
Background
At present, in application environments of products, electrical appliances, equipment and the like with an electric heating function, resistance wires, induction currents, electric arcs, electron beams or infrared rays are mostly adopted for heating, and the same heating efficiency is adopted under the conditions of the same power, voltage and resistance in the process of realizing electric heating. The temperature of the corresponding state of the terminal heating medium can be realized only by determining the power, the voltage and the resistance when the medium state in the electric heating is not changed or the temperature requirement on the heating medium is relatively single. The temperature range of the heating medium is large and difficult to control because of no change of the state requirement of the matching medium on the medium in the heating path in the existing electric heating process, and if the temperature of the medium meets the requirement, complex control needs to be provided.
Disclosure of Invention
The heating element can change the power density distribution of the corresponding position of the heating element according to the change of the actual requirement of the heating medium in a heating path under the condition of determining power, voltage and resistance, thereby realizing the accurate control of the state and temperature of the heating medium.
The invention adopts the following technical scheme for solving the technical problems, and the heating element with controllable heating efficiency is characterized by comprising a base material, an insulating layer arranged on the base material and a plurality of sections of heating resistors with different power densities arranged on the insulating layer, wherein the distribution trend of the power densities of the heating resistors on the insulating layer is that the power densities are gradually reduced from the water inlet end of the heating element to the water outlet end or the steam outlet end of the heating element.
Further, two or three heating resistors with different power densities are arranged on the insulating layer, the distribution trend of the power densities of the heating resistors on the insulating layer is decreased progressively from the water inlet end of the heating element to the water outlet end or the steam outlet end of the heating element, wherein the power density of the first heating resistor of the two heating resistors with different power densities is greater than 35W/cm, the power density of the last heating resistor is 25-50W/cm, the power density of the first heating resistor of the three heating resistors with different power densities is greater than 35W/cm, the power density of the middle heating resistor is 25-50W/cm, and the power density of the last heating resistor is less than 20W/cm.
Further defining that the power density of the first one of the two heating resistors with different power densities is 35-70W/cm, and the power density of the last one of the two heating resistors with different power densities is 25-50W/cm; the power density of the first segment of the heating resistors with different three-segment power densities is 35-70W/cm, the power density of the middle segment of the heating resistors is 25-50W/cm, and the power density of the last segment of the heating resistors is 5-20W/cm.
Further, the distribution trend of the power density of the heating resistor on the insulating layer is that the power density of the heating resistor decreases progressively from the water inlet end of the heating element to the water outlet end or the steam outlet end of the heating element, the heating medium moves from the water inlet end of the heating element to the water outlet end or the steam outlet end of the heating element, and the heating resistor is rectangular, circular, arc-shaped or spiral.
Compared with the prior art, the invention has the following advantages: on same heating element, under power, voltage and resistance are confirmed, through the accurate control to heating efficiency, realize heating medium temperature and state control, make the consumer experience feel better. Because the heat absorbed by the heating medium is different in different states, the temperature of the whole heating element is gradually increased from the water inlet end to the water outlet end or the steam outlet end, which is difficult to control the temperature of the heating element and influences the service life of the heating pipe.
Drawings
FIG. 1 is a graph of the effect of three-stage power density square and round heating elements of the present invention;
FIG. 2 is a schematic diagram of the operation of a three-stage power density heating element of the present invention;
FIG. 3 is a graph showing the effect of two stage power density rectangular and circular heating elements of the present invention;
FIG. 4 is a graph showing the effect of the two-stage power density spiral heating element of the present invention;
fig. 5 is a schematic diagram of the operation of a two-stage watt density heating element of the present invention.
Detailed Description
The technical scheme of the invention is described in detail with reference to the accompanying drawings. Different power densities and different heating efficiencies are realized on the same heating element under the determination of power, voltage and resistance. The state of the heating medium in the heating process is accurately controlled, so that the temperature and the state of the heating medium are more accurately controlled.
Steam discharging of the heating element: the water is heated to a stable dry steam state by room temperature water, and the state change of the water is as follows: the liquid state, the liquid-vapor mixing, the dry saturated vapor and the superheated vapor, the heating resistance of the heating element relative position and the power distribution influencing the heating speed can be in one-to-one correspondence and can be different.
Two stage power density
Three stage power density
The invention changes the power density distribution of the heating resistor in the heating element from the water inlet end to the water outlet end or the steam outlet end, thereby adjusting the temperature distribution of the heating element in the working state, leading the surface temperature of the heating element to be more uniform and further prolonging the service life of the heating element. The power density of the heating resistor in the invention is distributed on the heating element in a trend that the power density is gradually decreased from the water inlet end to the water outlet end or the steam outlet end.
The working principle of the invention is as follows: two power densities, line 2 for power density P1 and line 1 for power density P2, see fig. 5 for details. Three segment power densities, line 2 control power density P1, and line 1 control power densities P2 and P3, see in particular fig. 2.
The process of the invention is realized as follows:
according to the technical scheme, except that the screen printing resistors are different in process implementation, other processes are the same as the prior art, the corresponding resistance screen printing plate is manufactured according to a designed circuit, the resistance screen printing plate is fixed on a screen printing machine, the parallelism corresponding to the scraper, the screen printing plate and a workpiece is adjusted, and meanwhile, the force of prepressing the scraper on the screen printing plate is adjusted.
This embodiment is not limited to the lithography, but is also applicable to a heating element formed by circular tube printing, profile plate printing, and winding of resistance wire.
In this embodiment, the screen printing resistors are distributed along the moving path of the heating medium in the heating element, and the heating resistors are not limited in shape and may be rectangular, circular, spiral, or arc-shaped heating elements.
The specific implementation process of the invention is as follows: on the same heating element, different power densities are realized under the determination of power, voltage and resistance, and different heating efficiencies are realized, so that more accurate control on temperature is achieved. For example: water becomes liquid vapour mixing state by the liquid at the in-process of heating, become wet saturated steam by liquid vapour mixing state again, become dry saturated steam by wet saturated steam afterwards, become superheated steam by dry saturated steam again, make the difference of heating source temperature because power density's difference in whole heating process, arouse the difference of rate of heating because the difference of heating source temperature, water end temperature is high, heating element power density is low, surface temperature is low when making heating element heat, thereby make terminal temperature easily by accurate control, the realization heats water and obtains more accurate temperature and state.
Example 1
Taking three-stage power density as an example, designing steam quantity which needs 28m L water, heating tube design length of 80mm, outer diameter of 20mm, total power of 735W, voltage of 220V, lower power density P1 being designed as 66.5W/cm, power being designed as 400W/220V, middle power density P2 being designed as 45W/cm, lower stage power density P3 being designed as 18.3W/cm, and middle and lower power being designed as 335W/220V.
When the steam generator works, the heating pipe is filled with water, the commercial power 220V is used as a power supply for supplying power, the water pump supplies water, the water supply amount of the heating pipe is 28m L/min, the heating pipe is vertically placed, the power supply of the heating pipe is switched on, the P1 heats liquid water below the heating pipe to generate wet saturated steam, the P2 heats the wet saturated steam in the middle to further raise the temperature of the wet saturated steam, and the P3 heats dry saturated steam or superheated steam at the uppermost section to make the temperature of the dry saturated steam higher.
Example 2
Taking three-stage power density as an example, the design needs to output hot water at 95 ℃, the design length of the heating pipe is 125mm, the outer diameter is 24mm, the total power is 1700W, the voltage is 220V, the lower power density P1 is designed to be 56W/cm, the power design is 700W/220V, the middle power density P2 is designed to be 45W/cm, the lower stage power density P3 is designed to be 12W/cm, and the middle and lower power designs are 1000W/220V.
When the water heater works, the heating pipe is filled with water, the mains supply 220V is used as a power supply for supplying power, the water pump supplies water, the water supply amount per minute is 310m L/min at the water inlet temperature of 20 ℃, the heating pipe is vertically placed, three sections of power supplies of the heating pipe are switched on, P1 heats normal-temperature water to about 50.8 ℃, water heats warm water to about 77.5 ℃ through the power P2, water is heated to about 95 ℃ through the power P3, the power density of P3 is low, the temperature is relatively low, and the temperature can be controlled more accurately.
While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, the invention further resides in various changes and modifications which fall within the scope of the invention as claimed.
Claims (4)
1. A heating element with controllable heating efficiency is characterized by comprising a base material, an insulating layer arranged on the base material and a plurality of sections of heating resistors with different power densities arranged on the insulating layer, wherein the power density of the heating resistors is distributed on the insulating layer in a gradually decreasing manner from a water inlet end of the heating element to a water outlet end or a steam outlet end of the heating element.
2. A heating element with controllable heating efficiency as claimed in claim 1, wherein: two or three heating resistors with different power densities are arranged on the insulating layer, the distribution trend of the power densities of the heating resistors on the insulating layer is gradually decreased from a water inlet end of the heating element to a water outlet end or a steam outlet end of the heating element, wherein the power density of a first heating resistor in the two heating resistors with different power densities is larger than 35W/cm, the power density of a last heating resistor is 25-50W/cm, the power density of the first heating resistor in the three heating resistors with different power densities is larger than 35W/cm, the power density of the middle heating resistor is 25-50W/cm, and the power density of the last heating resistor is smaller than 20W/cm.
3. A heating element with controllable heating efficiency as claimed in claim 2, wherein: the power density of the first one of the two heating resistors with different power densities is 35-70W/cm, and the power density of the last heating resistor is 25-50W/cm; the power density of the first segment of the heating resistors with different three-segment power densities is 35-70W/cm, the power density of the middle segment of the heating resistors is 25-50W/cm, and the power density of the last segment of the heating resistors is 5-20W/cm.
4. A heating element with controllable heating efficiency as claimed in claim 1, wherein: the distribution trend of the power density of the heating resistor on the insulating layer is that the power density is gradually decreased from the water inlet end of the heating element to the water outlet end or the steam outlet end of the heating element, the heating medium moves from the water inlet end of the heating element to the water outlet end or the steam outlet end of the heating element, and the heating resistor is rectangular, circular, arc-shaped or spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010415609.0A CN111479339A (en) | 2020-05-16 | 2020-05-16 | Heating element with controllable heating efficiency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010415609.0A CN111479339A (en) | 2020-05-16 | 2020-05-16 | Heating element with controllable heating efficiency |
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| CN111479339A true CN111479339A (en) | 2020-07-31 |
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| CN202010415609.0A Pending CN111479339A (en) | 2020-05-16 | 2020-05-16 | Heating element with controllable heating efficiency |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693793A (en) * | 2012-06-04 | 2012-09-26 | 惠州市富济电子材料有限公司 | Heating resistant material, ceramic heating component provided with same, and preparing and application |
| KR20190050468A (en) * | 2017-11-03 | 2019-05-13 | 엘지이노텍 주식회사 | Heater and heating system including thereof |
| CN110650553A (en) * | 2019-09-27 | 2020-01-03 | 株洲利德英可电子科技有限公司 | Printing type heater assembly and manufacturing method |
| CN110794023A (en) * | 2019-11-07 | 2020-02-14 | 中国电子科技集团公司第四十九研究所 | Partial pressure type oxygen sensor with ceramic heater structure and preparation method thereof |
| CN210351691U (en) * | 2019-08-01 | 2020-04-17 | 厦门海赛米克新材料科技有限公司 | Ceramic heater for water heating with higher efficiency |
-
2020
- 2020-05-16 CN CN202010415609.0A patent/CN111479339A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693793A (en) * | 2012-06-04 | 2012-09-26 | 惠州市富济电子材料有限公司 | Heating resistant material, ceramic heating component provided with same, and preparing and application |
| KR20190050468A (en) * | 2017-11-03 | 2019-05-13 | 엘지이노텍 주식회사 | Heater and heating system including thereof |
| CN210351691U (en) * | 2019-08-01 | 2020-04-17 | 厦门海赛米克新材料科技有限公司 | Ceramic heater for water heating with higher efficiency |
| CN110650553A (en) * | 2019-09-27 | 2020-01-03 | 株洲利德英可电子科技有限公司 | Printing type heater assembly and manufacturing method |
| CN110794023A (en) * | 2019-11-07 | 2020-02-14 | 中国电子科技集团公司第四十九研究所 | Partial pressure type oxygen sensor with ceramic heater structure and preparation method thereof |
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Application publication date: 20200731 |