CN113086210B - Multi-partition three-phase electric heating unit - Google Patents
Multi-partition three-phase electric heating unit Download PDFInfo
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- CN113086210B CN113086210B CN202110377979.4A CN202110377979A CN113086210B CN 113086210 B CN113086210 B CN 113086210B CN 202110377979 A CN202110377979 A CN 202110377979A CN 113086210 B CN113086210 B CN 113086210B
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- 238000005192 partition Methods 0.000 title claims abstract description 19
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D15/00—De-icing or preventing icing on exterior surfaces of aircraft
- B64D15/12—De-icing or preventing icing on exterior surfaces of aircraft by electric heating
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Abstract
The present disclosure relates to a multi-partitioned three-phase electric heating unit comprising a plurality of heating strips divided into three partitions, one end of each partition being for coupling to one of the A, B, C phases of a three-phase power supply and the other end being for coupling to the N-phase of the three-phase power supply, wherein at least one of the three partitions is further divided into two sub-regions, the two sub-regions being arranged across at least one other of the three partitions and the two sub-regions being coupled together by a conductor.
Description
Technical Field
The present disclosure relates generally to electrical anti-icing/deicing systems, and more particularly to the design of heating zones and strips of anti-icing/deicing electrical heating functional units.
Background
When the electric anti-icing/deicing system works, the electric power consumption of the system is large. For example, a 200-300-seat civil aircraft has a wing electric anti-icing system with power consumption of 150-200kW. Even when operating in deicing mode, the energy consumption is 50-70kW. In order to realize effective utilization of electric energy, the electric energy needs to be supplied according to local energy demands of the protection area, so that the total energy consumption is reduced.
On the other hand, the wing and the like are made of composite materials. If the improper design of the heating partition causes the working temperature of at least part of the heating partition in the anti-icing/deicing system to be too high, the wing can be damaged/damaged, and potential safety hazards are caused to the aircraft.
Thus, there is a need for improvements in the design of the heating zones and strips of the anti-icing/de-icing electrical heating function unit.
Disclosure of Invention
An aspect of the present disclosure relates to a multi-partitioned three-phase electric heating unit, comprising a plurality of heating strips divided into three partitions, one end of each partition being for coupling to one of A, B, C phases of a three-phase power supply and the other end being for coupling to an N-phase of the three-phase power supply, wherein at least one of the three partitions is further divided into two sub-regions, the two sub-regions being arranged across both sides of at least another one of the three partitions, and the two sub-regions being coupled together by a conductor.
According to an exemplary embodiment, the three partitions comprise a 1-region, a 2-region, a 3-region, wherein at least one of the three partitions is further divided into two sub-regions comprising the 2-region is further divided into two sub-regions, and wherein the partitions of the three-phase electric heating unit are arranged in sequence as the 1-region, the first sub-region of the 2-region, the 3-region, and the second sub-region of the 2-region,
according to an exemplary embodiment, the heating strip of each zone comprises a transverse serpentine distribution arrangement within the respective zone.
According to an exemplary embodiment, when the three-phase electric heating unit is arranged on the wing, the zone 1 is at the upper side of the wing, remote from the wing leading edge, the zone 3 is at the wing leading edge, the first sub-zone of the zone 2 is at the upper side of the wing, close to the wing leading edge, between the zones 1 and 3, and the second sub-zone of the zone 2 is at the lower side of the wing, close to the wing leading edge.
According to an exemplary embodiment, the three-phase electric heating unit is configured such that the power density of the zone 3 is highest, the power density of the zone 2 is next highest, and the power density of the zone 1 is lowest.
According to an exemplary embodiment, the zone 3 further includes a lateral heating strip located on at least one of the left and right sides of the three zones.
According to an exemplary embodiment, the zone 3 further includes side heating strips located at left and right sides of the three zones, and the side heating strips are arranged to surround part or the entire sides of all zones.
According to an exemplary embodiment, the zone 3 is pre-activated as a hot knife when the three-phase electric heating unit is in the deicing mode of operation.
According to an exemplary embodiment, the other ends of the three sections are each coupled to the same connection point and are coupled to the N-phase of the three-phase power supply via the connection point.
According to an exemplary embodiment, the power density of each of the plurality of heating strips is designed based on load requirements.
According to an exemplary embodiment, each heating strip comprises one or more sections, wherein the power density of each heating strip of the plurality of heating strips is designed based on load requirements comprising achieving a desired power density by the shape and size of the one or more sections.
According to an exemplary embodiment, the one or more sections include two or more rectangular sections of different widths and trapezoidal sections joined between each other.
According to an exemplary embodiment, the power density of each heating strip is designed based on load requirements including achieving a desired power density by varying the degree of bulk density of the heating film within the heating strip.
Drawings
Fig. 1 shows a diagram of a prior art three-phase three-zone heating scheme.
FIG. 2 illustrates a diagram of a three-phase four-zone heating scheme in accordance with an exemplary aspect of the present disclosure.
Fig. 3A illustrates a heating zone deployment plan view of a three-phase four zone heating scheme and a schematic diagram of a circuit design, according to an exemplary aspect of the present disclosure.
Fig. 3B illustrates a heating zone deployment plan view of a three-phase four zone heating scheme and a schematic diagram of a circuit design, according to an exemplary aspect of the present disclosure.
Fig. 4 illustrates a heating zone expanded plan view of a three-phase four zone heating scheme and a schematic diagram of a circuit design according to another exemplary aspect of the present disclosure.
Fig. 5 shows a schematic diagram of a heat bar design according to an exemplary aspect of the present disclosure.
Fig. 6 shows a diagram of a heat bar internal heating film layout according to an exemplary embodiment of the present disclosure.
FIG. 7 illustrates a comparison of power density design requirements versus design results for a three-phase four-zone heating scheme according to an exemplary aspect of the present disclosure.
Detailed Description
For a better understanding of the technical solution of the present invention, embodiments of the present application are described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are merely a subset of the embodiments of the present application, and not an listing of all embodiments. All other variations, based on the embodiments described in this disclosure, which would be within the scope of this application by one of ordinary skill in the art without undue burden to create custom efforts.
Fig. 1 shows a diagram of a prior art three-phase three-zone heating scheme 100. The electrical anti-icing/deicing system may typically employ on-board three-phase ac 230VAC as the power supply. The power consumption of the electric anti-icing/deicing system is relatively large. Therefore, to reduce the waste of electrical energy on the power transmission cable and reduce the cable voltage drop, the electric heating zone arrangement can be divided into 3 heating zones, and each phase of electricity is independently supplied to one heating zone. Each heating zone is equivalent to a heating resistor. Considering that three-phase current balance needs to be ensured, the resistance value of each block of subarea needs to be the same.
The upper part of fig. 1 shows a schematic view of the leading edge of the wing. As can be seen, in the three-phase three-zone heating scheme 100, the wing leading edge is divided into three heating zones, labeled zone 1, zone 2, and zone 3, respectively, where zone 1 is the upper side of the wing, zone 2 is the front side of the wing, and zone 3 is the lower side of the wing. In this example, the load demand is highest in zone 2, zone 1 and zone 3 of the leading edge of the wing.
For heating in three zones, A, B, C three phases of power can be supplied to the three heating zones described above, namely zones 1, 2 and 3, respectively. For example, one end of the heating strip of each zone may be coupled to one of the phases (e.g., A, B, C phase) of the three-phase power supply, while the other end may be coupled to the N-phase (i.e., neutral, or O-phase) of the three-phase power supply. Thus, the zone heating is realized by six power supply lines.
The lower half of fig. 1 shows the load demand and power distribution corresponding to the three heating zones. As can be seen, the curves show the load requirements of the respective heating zones, while the hatched rectangles show the power distribution of the respective heating zones. As can be seen, zone 2 with the highest load demand achieves the highest power allocation, zone 1 with the higher load demand achieves the next highest power allocation, and zone 3 with the lower load demand achieves the lowest power allocation.
However, the blank area below the load demand line indicates that there are situations where the power distribution is insufficient to meet the load demand in at least a portion of the areas, such as the end of area 1 near area 2 and the end of area 3 near area 2. On the other hand, the hatched area above the load demand line indicates that there is a case where the power distribution exceeds the load demand in at least another partial area, for example, the end of the 1 region away from the 2 region, and the end of the 3 region away from the 2 region. When the power distribution is insufficient, the corresponding area is easy to freeze to change the profile shape of the wing, so that the lift force is reduced, the resistance is increased, and even the flying is difficult to operate and unstable. And when the power distribution is excessive, the energy is wasted by light weight, and the wing is potentially damaged by heavy weight, so that potential safety hazards are brought.
The required anti-icing/deicing heating power density within the protected zone region varies due to aircraft wing or nacelle leading edge differences. When the zoning heating design is designed, the three-phase balance of electric energy and the optimized supply of local power are considered, the total power demand of the environment is supplied according to the demand, and meanwhile, the influence of the zoning result on the processing and manufacturing and the service life of the functional unit product is considered. Through effective design, can carry out design optimization to the heating guard zone to reduce energy consumption, and effectively utilize the electric energy according to the heating power demand in different regions.
FIG. 2 illustrates a diagram of a three-phase four-zone heating scheme 200 in accordance with an exemplary aspect of the present disclosure. Similar to fig. 1, the upper half of fig. 2 shows a schematic view of the wing leading edge. As can be seen, in the three-phase four zone heating scheme 200, the wing leading edge is divided into four heating zones, labeled zone 1, zone 2, zone 3, and zone 2, respectively, wherein zone 1 is located on the upper side of the wing away from the wing leading edge, zone 2 is located on the upper and lower sides of the wing near the wing leading edge, respectively, and zone 3 is located on the wing leading edge. In this example, the load demand is highest in zone 3 of the leading edge of the wing, with two zones 2 being secondary and the load demand in zone 1 being lower.
Accordingly, by physically dividing the heating zones of the three-phase electricity into four blocks, the power distribution can be optimized while satisfying the three-phase heating balance. As can be seen from fig. 2, such a three-phase four-zone heating scheme reduces power waste in the shadow area above the load demand line, as compared to the three-phase three-zone heating scheme of fig. 1, while at the same time compensating for the lack of power distribution below the load demand line, thereby improving both energy efficiency and aircraft safety.
The heating zone design of the present application is illustrated above with three-phase four zones as an example. The present disclosure may also include other heating zone designs, such as three-phase five zones, three-phase six zones, and the like. The more zones, the higher the energy efficiency, however its design, heating bar processing, wiring, etc. will be complicated. The above three-phase four zone heating zone design is the preferred embodiment obtained after weighing various factors. However, other heating zone designs employing the concepts of the present disclosure are also within the scope of the present application.
Fig. 3A illustrates a heating zone deployment plan view of a three-phase four-zone heating scheme and a schematic diagram of a circuit design 300A according to an exemplary aspect of the present disclosure. As shown in fig. 3A, the different heating strips shown in different hatching may correspond to respective heating zones in, for example, the three-phase four-zone heating scheme 200 described above in connection with fig. 2. For example, a hatched heating strip section from left to right corresponds to section 1 also shown in fig. 2 in a hatched section from left to right; the hatched heating strip sections from right to left correspond to the 2 sections also shown in fig. 2 in a hatched right to left; the cross-hatched heating strip sections correspond to the 3 sections also shown in cross-hatched form in fig. 2.
As in fig. 3A, the respective zones of the heating strip are distributed in the order corresponding to zones 1, 2, 3, and 2 in fig. 2, respectively.
As can be seen from the example of fig. 3A, the C-phase of the three-phase power supply is coupled to connection point 1 and from connection point 2 to the N-phase of the three-phase power supply after passing through the serpentine-distributed heating strips of zone 3. Phase a of the three-phase power supply is coupled to the connection point 3 and after passing through the serpentine-shaped heating strips in the lower half 2 zone, goes from one side of zone 3 to the upper half 2 zone and is also coupled from the connection point 2 to phase N of the three-phase power supply after passing through the serpentine-shaped heating strips in the upper half 2 zone. Phase B of the three phase power supply is coupled to connection point 4 and from connection point 2 to phase N of the three phase power supply after passing through the serpentine distributed heating strips of zone 1.
The exemplary circuit design 300A of fig. 3A reduces the six power supply lines for three heating zones to four by pooling the N phases of three-phase star connection through a heat bar strike design. The three-phase electric heating zone is physically divided into four blocks, namely "1-2-3-2" as shown in fig. 2.
According to the exemplary embodiment, by adjusting the arrangement of the upper and lower two-part 2 zones, the arrangement of the guard zone can be adjusted so that the power distribution is optimal while satisfying the three-phase heating balance.
According to an exemplary embodiment, zone 3 may be disposed proximate to the guard leading edge stagnation point "S". The partition generally requires a relatively large amount of energy. Therefore, in the deicing operation mode, the 3-zone heating can be started in advance, so that the 3-zone heating can exert the hot knife effect, and a better deicing effect can be achieved.
Although a three-phase electric heating zone layout of "1-2-3-2" is shown in the example of fig. 3A, one of ordinary skill in the art will recognize that the present disclosure is not limited to four zones nor to just dividing 2 into upper and lower sections. For example, according to an alternative embodiment, there may be a three-phase five-zone layout of "1-2-3-2-1", where zones 1 and 2 are each divided into upper and lower portions, respectively, and so on.
Fig. 3B illustrates a heating zone deployment plan view of a three-phase four-zone heating scheme and a schematic diagram of circuit design 300B, according to an exemplary aspect of the present disclosure.
Similar to fig. 3A, different heating strips shown in fig. 3B with different hatching may correspond to different heating zones. For example, a hatched heating strip section from left to right in fig. 3B corresponds to section 1 also shown in left to right in fig. 2; the hatched heating strip sections from right to left correspond to the 2 sections also shown in fig. 2 in a hatched right to left; the cross-hatched heating strip sections correspond to the 3 sections also shown in cross-hatched form in fig. 2.
Unlike fig. 2 and 3A, the respective heating strip sections are distributed in the order corresponding to the sections 2, 1, 3, and 2, respectively, from top to bottom as shown in fig. 3B.
As can be seen from the example of fig. 3B, the C-phase of the three-phase power supply is coupled to connection point 1 and from connection point 2 to the N-phase of the three-phase power supply after passing through the serpentine-distributed heating strips of zone 1. Phase a of the three-phase power supply is coupled to connection point 3 and passes over the serpentine-shaped heating strips of zone 2 of the lower half to zone 2 of the upper half from one side of zones 3 and 1 and also from connection point 2 to phase N of the three-phase power supply after passing over the serpentine-shaped heating strips of zone 2 of the upper half. Phase B of the three phase power supply is coupled to connection point 4 and from connection point 2 to phase N of the three phase power supply after passing through the serpentine distributed heating strips of zone 3.
The zone 3, as arranged in fig. 3B, is located near the guard front stagnation point "S" and one side edge location, while the heating strip in zone 2 connecting the lower half zone 2 and the upper half zone 2 is located at the other side edge location. In the deicing mode, the 3-zone heating can be started in advance, so that the 3-zone heating can exert the hot knife effect, and a better deicing effect can be achieved.
Fig. 4 illustrates a heating zone deployment plan view of a three-phase four-zone heating scheme and a schematic diagram of a circuit design 400 according to another exemplary aspect of the present disclosure.
Similar to fig. 3, the different heating strips shown in fig. 4 with different hatching may correspond to respective heating zones in a three-phase four-zone heating scheme 200, such as described above in connection with fig. 2. For example, likewise, a hatched heating strip section from left to right in fig. 4 corresponds to section 1 also shown in left to right in fig. 2; the hatched heating strip sections from right to left correspond to the 2 sections also shown in fig. 2 in a hatched right to left; the cross-hatched heating strip sections correspond to the 3 sections also shown in cross-hatched form in fig. 2.
As in fig. 4, the respective zones of the heating strip are distributed in the order corresponding to zones 1, 2, 3, and 2 in fig. 2, respectively. However, as can be seen in the heating zone expanded plan view of the three-phase four zone heating scheme of fig. 4 and circuit design 400, the heating strips of zone 3 are not merely serpentine distributed about the guard front stagnation point "S" as in fig. 3, but rather also form side hot knife zones along the left and right sides of the heating zone, respectively, such that the heating strips of the side hot knife zones substantially surround the entire sides of zones 1, 2, 3, 2. Of course, the side hot knife zones of the present disclosure are not limited to two sides, but may also include a solution with only one side hot knife as desired.
As can be seen from the example of fig. 4, the C-phase of the three-phase power supply is coupled to the connection point 1 and from the connection point 2 to the N-phase of the three-phase power supply after passing through the serpentine-distributed heating strips of zone 1. Phase a of the three-phase power supply is coupled to connection point 6 and from connection point 5 to connection point 4 after passing through the serpentine-shaped heating strips in the lower half 2 region and from connection point 2 to phase N of the three-phase power supply after passing through the serpentine-shaped heating strips in the upper half 2 region. Phase B of the three phase power supply is coupled to connection point 3 and from connection point 2 to phase N of the three phase power supply after passing through the serpentine distributed heating strips of zone 3.
The 3-zone position arranged in fig. 4 is close to the guard front edge standing point 'S' and the two side edge positions, so that in the deicing operation mode, the 3-zone heating can be started in advance to exert the 'hot knife' effect, and a better deicing effect can be achieved. Compared with the layout in fig. 3A and 3B, the lateral edge region can be better prevented from icing due to the addition of the lateral hot knife region, thereby improving the safety of the aircraft.
Example heating zone deployments, heat bar layouts, circuit connections, etc. of the three-phase four-zone heating schemes of the present disclosure are described above in connection with fig. 3A, 3B, and 4. However, those of ordinary skill in the art will recognize that various modifications can be made to the above disclosure without departing from the scope of the disclosure. For example, a three-phase five-zone heating scheme may be designed in light of the schemes of the present disclosure, as well as other hot knife distributions or heating bar connection orientations (e.g., longitudinal, diagonal, serpentine, staggered, etc.) may be designed.
For the different design zoned connection forms of fig. 3A, 3B, 4, etc., the heating strip profile design can be performed by using shielding films or shielding tapes, including controlling the trend and width. The thickness, material of the heating film, etc. can be controlled during the spraying process.
In general, the power supply contact needs to be perforated on the base structure, so that the local structural strength is reduced, meanwhile, the power supply end, the electric heating film and the base structure are different in material properties due to the fact that the electric heating film is covered on the surfaces of the base and the end, breakage is easy to occur, the risk is increased due to repeated cold and hot impact in the working process, and the service life of the functional units is prolonged due to the fact that the quantity of the power supply contact is reduced. The electrical anti-icing/deicing functional unit zone design of the present disclosure reduces the number of electrical heating film power plant contacts while achieving on-demand heating of the leading edge guard zone zones.
At the same time, the heating zone design of the present disclosure provides a "hot knife". Through heating control, the hot knife can provide a better deicing function, and the protection efficiency during deicing operation can be improved. The present disclosure is not limited to forming hot knives near the location where the aircraft slat leading edge geometry stagnation point intersects and on the left and right sides of the heating zone, but may have other hot knife layouts. For example, the hot knife can also be arranged in a Chinese character ' ri ', tian ', transverse king ' character ' shape and the like, and even can be arranged in other geometric shapes by the trend design of the heating strips.
To provide accurate power distribution according to load demand, the local resistance of the heater strip may be adjusted. For example, each heating strip in the guard zone may be designed to have a different heating power density p=i×r after energizing 2 and/S, wherein P is power density, I is current, R is resistance value, and S is area. By designing the resistance value of each heating strip, it is possible to have the required heating power density with the same current I.
According to an exemplary embodiment, a three-phase four-zone heating scheme according to the present disclosure may include two schemes of varying the heating power density of the heating strips.
The first approach may include designing the resistance value of the heater strips (e.g., each individual heater strip in fig. 3) in the heater film by selecting the heater film material, heater strip width, heater strip thickness, heater strip length, heater strip coverage, etc.
As can be appreciated, changing the dimensions (e.g., length, width, height, etc., or any combination thereof) of the heater strip can correspondingly change the resistance value of the heater strip, thereby correspondingly changing the heating power density of the heater strip. Additionally or alternatively, the heating power density of the heater strip may also be varied accordingly by varying the heating film material (e.g., alloy, carbon crystal, PCT ceramic, graphene, etc.), and the heater strip coverage, etc.
The second approach may include varying the resistance value of the heater strip (e.g., each individual heater strip of fig. 3A, 3B, 4) by designing the shape of the heater strip in the spanwise direction.
Fig. 5 shows a schematic diagram of a heat bar design 500 in accordance with an exemplary aspect of the present disclosure.
As shown in fig. 5, a single heating strip is designed to include N sections, namely section a, section B, … …, section N. Each section may comprise a different shape and size. The desired resistance and thus the desired heating power density is achieved by the different dimensions of the heating sections A, B, … …, N.
In the example of fig. 5, the N sections of a single heating strip are designed to include several rectangular sections of different lengths and/or widths and trapezoidal sections joined between two by two. Of course, the heat bar designs of the present application are not limited thereto, but may include other shapes, sizes, and designs.
According to an exemplary embodiment, the design of the heating strip may be based on, for example, monitoring of wing temperature during flight. For example, where the temperature is relatively low and ice formation is likely, the cross-sectional area of the heating strip in the section may be suitably reduced to increase the resistance value of the section and increase the heating power of the section.
Although an exemplary single heater strip shape and size design is shown in fig. 5, it will be appreciated by those of ordinary skill in the art that this is for illustrative purposes only and is not intended to be limiting in any way in accordance with the present disclosure.
According to a further exemplary embodiment, the desired heating power density can also be achieved by varying the degree of density of the heating film inside the heating strip.
Fig. 6 shows a diagram of a heat bar internal heating film layout 600 according to an exemplary embodiment of the present disclosure. As shown, by varying the degree of density of the heating film within the heating strips, a desired heating power density can be achieved. Generally, denser heating films can result in higher heating power densities; conversely, a thinner heating film may result in a lower heating power density. Similarly, the heat bar internal heating film layout 600 may also be designed based on, for example, monitoring of wing temperature during flight. For example, where the temperature is lower and ice formation is easier, the heating power of the section can be increased by appropriately increasing the density of the heating film.
The arrangement of fig. 6 for varying the degree of heat film bulk density may be used in combination with the heat bar of the first arrangement described above, or in combination with the heat bar of the second arrangement described above. When used in connection with the second scheme, the resistance may be sized by different circuit grid densities within the same section (e.g., section a, etc.), resulting in different power or power density distributions when passing the same current.
As known to those of ordinary skill in the art, the above-described schemes of selecting a heating film material, a heating strip width, a heating strip thickness, a heating strip length, a heating strip coverage, etc. to design a resistance value of the heating strip, designing a shape of the heating strip in a spanwise direction to change the resistance value of the heating strip, and changing a degree of density of the heating film may be used alone or in combination, which are within the scope of the present disclosure.
FIG. 7 illustrates a comparison 700 of power density design requirements versus design results for a three-phase four-zone heating scheme in accordance with an exemplary aspect of the present disclosure.
As shown in fig. 7, the horizontal axis shows the power density, and the vertical axis shows the size. The left half of fig. 7 shows a comparison of power density design requirements versus design results for a three-phase four-zone heating scheme according to the present disclosure, with the dashed lines showing the design requirements and the solid lines showing the actual design results. The right half of fig. 7 shows a simplified computational model corresponding to the left half, wherein the different heating zones shown in different hatching may correspond to respective heating zones in a three-phase four-zone heating scheme such as described above in connection with fig. 2, 3A and 4. For example, a hatched heating strip section from left to right corresponds to section 1 in fig. 2, 3A and 4, also shown in left to right hatching; the hatched heating strip sections from right to left correspond to the 2 sections also shown in fig. 2, 3A and 4 in hatched right to left; the cross-hatched heating strip sections correspond to the 3 sections shown in fig. 2, 3A and 4 also in cross-hatched form.
As can be seen from fig. 7, according to this exemplary design, the design length of the uppermost zone 1 is about 120mm, and the design required power density is about 19.1kW/m 2 The actual design result reaches 17.9kW/m 2 . The design length of the upper half 2 zone and the lower half 2 zone are about 54mm, respectively, and the design required power density is about 21.9kW/m 2 The actual design result reaches 20.7kW/m 2 . The design length of the 3 zones through which the geometrical standing point of the front edge of the aircraft slat passes is about 42mm, and the design requirement power density is about 29.8kW/m 2 The actual design result reaches 29.8kW/m 2 。
As can be seen, the three-phase four-zone heating scheme of this exemplary design meets the design requirements to achieve the desired power density.
One of the cores of the present disclosure is the load distribution requirements based on the leading edge guard. By designing the trend of the electric heating strips and the dimensions of the heating strips, the scheme of the present disclosure achieves a locally more accurate energy supply to the heating zone.
On the other hand, the scheme of the present disclosure reduces the number of power supply contacts of the internal structure of the functional unit. By reducing the number of the power supply contacts of the internal structure of the functional unit, the reduction of the service life of the functional unit due to the structural weakness of the power supply contacts is avoided.
What has been described above is merely an illustrative embodiment of the present invention. The scope of the invention is not limited in this respect. Any changes or substitutions that would be easily recognized by those skilled in the art within the technical scope of the present disclosure are intended to be covered by the present invention.
It is to be understood that the claims are not limited to the precise configurations and components illustrated above. Various modifications, substitutions and alterations can be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.
Claims (13)
1. A multi-zone three-phase electrical heating unit comprising:
a plurality of heating strips divided into three sections, one end of each section for coupling to one of A, B, C phases of a three-phase power supply and the other end for coupling to N phases of the three-phase power supply, wherein
At least one of the three partitions is further divided into two sub-regions, the two sub-regions are arranged across at least one other of the three partitions, and the two sub-regions are coupled together by conductors, wherein
The load requirements of the two sub-zones are lower than the load requirements of the at least one other zone in between,
at least one of the at least one other zone is for heating a leading edge of the guard region; and, in addition, the processing unit,
the three zones and their respective sub-zones are arranged chordwise of the protective area.
2. The three-phase electric heating unit of claim 1, wherein the three zones comprise zone 1, zone 2, zone 3, wherein at least one of the three zones is further divided into two sub-zones comprising the zone 2 is further divided into two sub-zones, and wherein
The partitions of the three-phase electric heating unit are arranged in sequence as a first sub-region of the 1-region, the 2-region, the 3-region, and a second sub-region of the 2-region.
3. A three-phase electric heating unit as recited in claim 2, wherein the heating strips of each zone comprise a transverse serpentine distribution arrangement within the respective zone.
4. A three-phase electrical heating unit as claimed in claim 2, wherein when the three-phase electrical heating unit is arranged on a wing, the zone 1 is at the upper side of the wing remote from the wing leading edge, the zone 3 is at the wing leading edge, the first sub-zone of zone 2 is at the upper side of the wing proximate to the wing leading edge and between zones 1 and 3, and the second sub-zone of zone 2 is at the lower side of the wing proximate to the wing leading edge.
5. The three-phase electrical heating unit of claim 4, wherein the three-phase electrical heating unit is configured such that the power density of zone 3 is highest, the power density of zone 2 is next highest, and the power density of zone 1 is lowest.
6. The three-phase electric heating unit of claim 5, wherein the zone 3 further comprises a side heating strip located on at least one of the left and right sides of the three zones.
7. The three-phase electric heating unit of claim 6, wherein the zone 3 further comprises side heating strips located on left and right sides of the three zones, and the side heating strips are arranged to surround part or the entire sides of all zones.
8. A three-phase electric heating unit according to any of claims 5-7, wherein zone 3 is pre-activated as a hot knife when the three-phase electric heating unit is in deicing mode of operation.
9. The three-phase electrical heating unit of claim 1, wherein the other ends of the three sections are each coupled to a same connection point and are coupled to N phases of the three-phase power supply through the connection points.
10. The three-phase electrical heating unit of claim 1, wherein the power density of each of the plurality of heating strips is designed based on load demand.
11. The three-phase electrical heating unit of claim 10, wherein each heating strip comprises one or more sections, wherein the power density of each heating strip of the plurality of heating strips is designed based on load demand comprising:
the desired power density is achieved by the shape and size of the one or more sections.
12. The three-phase electric heating unit of claim 11, wherein the one or more sections comprise two or more rectangular sections of different widths and trapezoidal sections joined between two by two.
13. The three-phase electric heating unit of any of claims 10-12, wherein the power density of each heating strip is designed based on load demand comprising:
the desired power density is achieved by varying the degree of bulk density of the heating film within the heating strip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110377979.4A CN113086210B (en) | 2021-04-08 | 2021-04-08 | Multi-partition three-phase electric heating unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110377979.4A CN113086210B (en) | 2021-04-08 | 2021-04-08 | Multi-partition three-phase electric heating unit |
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| CN113086210B true CN113086210B (en) | 2023-05-23 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1087564A (en) * | 1963-11-22 | 1967-10-18 | Plessey Uk Ltd | Improvements relating to electrical de-icing systems |
| CN1116600A (en) * | 1994-04-13 | 1996-02-14 | B·F·谷德里奇公司 | Electrothermal deicing system |
| JPH10208855A (en) * | 1997-01-23 | 1998-08-07 | Toshiba Ceramics Co Ltd | Surface heater |
| GB2410481B (en) * | 2004-01-30 | 2008-06-04 | Ultra Electronics Ltd | Modular aircraft control system and method |
| CN102783246B (en) * | 2008-10-14 | 2015-11-25 | 空中客车营运有限公司 | There is the heating system of at least one electric heating zone of heating, there is the structure member of this zone of heating, heating means and the method for the manufacture of the parts semi-finished product or parts with heater |
| US20180086470A1 (en) * | 2015-03-06 | 2018-03-29 | Sikorsky Aircraft Corporation | Heating design for rotorcraft blade de-icing and anti-icing |
| CN205113722U (en) * | 2015-10-10 | 2016-03-30 | 中国商用飞机有限责任公司 | Non-uniform electric heating element for an airfoil |
| DE102016118137A1 (en) * | 2016-09-26 | 2018-03-29 | Heraeus Noblelight Gmbh | Infrared Panel Heaters |
| CN108190001A (en) * | 2017-12-29 | 2018-06-22 | 西北工业大学 | A kind of anti-deicing covering in novel subregion |
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