CN105216814B - A kind of warm-air drier for rail vehicle - Google Patents
A kind of warm-air drier for rail vehicle Download PDFInfo
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- CN105216814B CN105216814B CN201510663054.0A CN201510663054A CN105216814B CN 105216814 B CN105216814 B CN 105216814B CN 201510663054 A CN201510663054 A CN 201510663054A CN 105216814 B CN105216814 B CN 105216814B
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Abstract
The present invention relates to heating equipment technical field, more particularly to a kind of warm-air drier for rail vehicle.The warm-air drier includes housing, it is divided into heating chamber and control chamber in the housing, heating element heater and blower fan are provided with the heating chamber, and the leading flank of the housing is additionally provided with the air inlet connected with the heating chamber, the blower fan is disposed in proximity to the position of air inlet, the air outlet connected with the heating chamber is provided with the trailing flank of the housing, the heating element heater is arranged in the heating chamber between the air inlet and air outlet, and the connecting terminal block for being used for wiring and the electrical control gear for controlling warm-air drier are provided with the control chamber.The heating part of warm-air drier and control section are provided separately, topology layout is reasonable, effectively reduce the volume of warm-air drier, it is adapted for mount to under-seat, reduce influence of the warm-air drier to the occupancy in compartment space and to interior outward appearance, and influence of the high temperature to circuit in control chamber and electrical equipment is reduced, improve the security of warm-air drier.
Description
Technical field
The present invention relates to heating equipment technical field, more particularly to a kind of warm-air drier for rail vehicle.
Background technology
In recent years, the raising with service awareness with advances in technology, in order to provide comfortably environment by bus to passenger, warm up
Wind devices have turned into the important composition part of vehicle.At present, traditional warm air equipment is typically mounted at in-car wallboard and car body side
Between wall, and now in order to save as far as possible interior using space, the in-car wallboard that some vehicles are reserved with
The gap of vehicle body side wall is smaller, and traditional warm air equipment can not arrange installation, but if being directly placed in compartment, not only takes
Compartment space, have an effect on the attractive in appearance of interior.And pass through the investigation to vehicle interior structure at the same time, find seat in compartment
The space of lower section is also underutilized, and with the possibility for laying warm air equipment, but traditional warm air equipment is because by structure
Limitation, volume is larger to be unsuitable for being placed in under-seat.
Therefore, a kind of deficiency for more than, it is desirable to provide the warm-air drier for rail vehicle of small volume and brand new.
The content of the invention
(1) technical problems to be solved
It is an object of the invention to provide a kind of topology layout, reasonable and small volume can be arranged under rail vehicle seat
The warm-air drier of side, to reduce influence of the warm-air drier to the occupancy in compartment space and to interior outward appearance.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of warm-air drier for rail vehicle, including housing, institute
State and be divided into heating chamber and control chamber in housing, heating element heater and blower fan are provided with the heating chamber, and in the front side of the housing
Face is additionally provided with the air inlet connected with the heating chamber, and the blower fan is disposed in proximity to the position of air inlet, in the housing
Trailing flank is provided with the air outlet connected with the heating chamber, and the heating element heater is arranged between the air inlet and air outlet
In heating chamber, the connecting terminal block for being used for wiring and the electrical control gear for controlling warm-air drier are provided with the control chamber.
Preferably, the thermal insulation board filled with heat-insulated material is set between the heating chamber and control chamber.
Preferably, the terminals of the heating element heater are located in the control chamber through the thermal insulation board.
Preferably, the heating element heater is how U-shaped electric heating tube.
Preferably, it is wound with radiating fin on the how U-shaped electric heating tube.
Preferably, the air outlet position is provided with renewable type Overtemp. protector, and the heating element heater is provided with can not be extensive
Compound Overtemp. protector, the renewable type Overtemp. protector and beyond retrievable Overtemp. protector connect with the control device
Connect.
Preferably, the housing is externally provided with power supply indicator, fan trouble indicator lamp and malfunctioning heating elements indicator lamp, institute
Power supply indicator, fan trouble indicator lamp and malfunctioning heating elements indicator lamp is stated to be connected with the electrical control gear.
Preferably, the electrical control gear includes undercurrent relay KA1, relay KA2, relay KA3, contactor
KM, time-delay relay KT, wherein,
Relay KA3One end of coil is connected with positive source, the other end and the beyond retrievable Overtemp. protector string
It is connected after connection with power cathode, relay KA3The first normally-closed contact be connected with positive source, the second normally-closed contact and heating unit
It is connected after the series connection of part malfunction indicator lamp with power cathode；
One end of contactor KM coils is connected after being connected with renewable type Overtemp. protector with power cathode, and the other end is with prolonging
When relay KT a pair of normally opened contacts and relay KA3A pair of normally opened contacts series connection after be connected with positive source；
One end of time-delay relay KT coils is connected with power cathode, the other end and relay KA2A pair of normally opened contacts
It is connected after series connection with positive source；
Relay KA2First normally-closed contact is connected with positive source, and the second normally-closed contact joins with the fan trouble lamp string
It is connected afterwards with power cathode；
One end of the blower fan is connected with positive source, the other end and relay KA1First input end connection, relay
KA1The second input be connected with power cathode, relay KA1Two power inputs born respectively with positive source and power supply
Pole connects, relay KA1The first output end be connected with power cathode, relay KA1The second output end and relay KA2's
It is connected after coil series connection with positive source；
Described power supply indicator one end is connected with positive source, and the other end is connected with power cathode.
Preferably, wiring frame is additionally provided with the control chamber, and the wiring frame is fixed on the thermal insulation board.
Preferably, the left surface of the housing, right flank and upper side are demountable structure.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that：Provided by the present invention for the warm-air drier of rail vehicle, bag
Housing is included, heating chamber and control chamber are divided into the housing, heating element heater and blower fan are provided with the heating chamber, and in the shell
The leading flank of body is additionally provided with the air inlet connected with the heating chamber, and the blower fan is disposed in proximity to the position of air inlet, in institute
The trailing flank for stating housing is provided with the air outlet connected with the heating chamber, and the heating element heater is arranged at the air inlet and air-out
In heating chamber between mouthful, the connecting terminal block for being used for wiring and the electric-controlled for controlling warm-air drier are provided with the control chamber
Device processed.It is divided into heating chamber and control chamber in the housing of warm-air drier, the heating part of warm-air drier and control section is provided separately,
Topology layout is reasonable, effectively reduces the volume of warm-air drier, is adapted for mount to under-seat, reduces warm-air drier to compartment space
Occupancy and the influence to interior outward appearance, and influence of the high temperature to circuit in control chamber and electrical equipment is reduced, improve warm
The security of blower fan.
Brief description of the drawings
Fig. 1 is the structural representation for the warm-air drier that the embodiment of the present invention is used for rail vehicle；
Fig. 2 is the positive structure diagram for the warm-air drier that the embodiment of the present invention is used for rail vehicle；
Fig. 3 is the internal structure schematic diagram for the warm-air drier that the embodiment of the present invention is used for rail vehicle；
Fig. 4 is the internal structure schematic diagram of heating chamber of the embodiment of the present invention；
Fig. 5 is the control circuit schematic diagram for the warm-air drier that the embodiment of the present invention is used for rail vehicle；
Fig. 6 is the heating main circuit schematic diagram for the warm-air drier that the embodiment of the present invention is used for rail vehicle.
In figure：1：Housing；11：Leading flank；12：Upper side；13：Right flank；14：Left surface；15：Trailing flank；16：Heating
Chamber；161：Air inlet；162：Air outlet；17：Control chamber；171：Cable-through hole；172：Power supply indicator；173：Fan trouble indicates
Lamp；174：Malfunctioning heating elements indicator lamp；2：Heating element heater；21：Terminals；22：Radiating fin；3：Renewable type overtemperature prote
Device；4：Beyond retrievable Overtemp. protector；5：Blower fan；6：Thermal insulation board；7：Wiring frame；8：Connecting terminal block；9：Electrical control fills
Put；10：Ground terminal.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.
In addition, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or implying phase
To importance.
As depicted in figs. 1 and 2, the warm-air drier provided in an embodiment of the present invention for rail vehicle, including housing 1, the shell
Body 1 includes six faces, for convenience of describing, in the present embodiment with the face (face for being provided with air inlet) described in Fig. 2 for before housing 1
Side 11, the left side of leading flank 11 is left surface 13, and the right side of leading flank 11 is right flank 14, and the upside of leading flank 11 is upper side
12。
As shown in figure 3, housing 1 divides for heating chamber 16 and control chamber 17, heating element heater 2 and wind are provided with heating chamber 16
Machine 5, as in Figure 2-4, the air inlet 161 connected with heating chamber 16 is set on the leading flank 11 of housing 1, blower fan 5 is arranged at
Close to the position of air inlet 161, and set filter screen on air inlet 161, for preventing other objects to be inhaled into heating chamber 16
It is interior, and blower fan 5 is played a protective role, the air outlet 162 connected with heating chamber 16 is set on the trailing flank 15 of housing 1, it is excellent
Selection of land, air outlet 162 are air outlet with vanes, and heating element heater 2 is arranged at the heating chamber 2 between air inlet 161 and air outlet 162
Interior, air enters in heating chamber 16 from air inlet 161, after heated element 2 heats, is discharged from air outlet 162, reaches warm wind and add
The effect of heat.The connecting terminal block 8 of wiring is provided in control chamber 17, makes circuit neat appearance, it is easy to maintenance, it is additionally provided with
For the electrical control gear 9 for controlling warm-air drier to work, make the control of warm-air drier more intelligent, be additionally provided with single ground terminal
10, for connecting ground wire.Be divided into heating chamber 16 and control chamber 17 in the housing 1 of the warm-air drier, by the heating part of warm-air drier and
Control section is provided separately, and topology layout is reasonable, effectively reduces the volume of warm-air drier, is adapted for mount to under-seat, is reduced
Influence of the warm-air drier to the occupancy in compartment space and to interior outward appearance, and reduction high temperature is to circuit in control chamber 17 and electrically
The influence of element, improve the security of warm-air drier.
In order to further reduce influence of the warm-air drier heating part to the high temperature of circuit and electrical equipment in control chamber 17,
Preferably, thermal insulation board 6 is provided between heating chamber 16 and control chamber 17, prevents high temperature from conducting into control chamber 17, make circuit and
Each electrical equipment can work at normal temperatures, improve the stability of work, extend its service life.It is highly preferred that in thermal insulation board 6
It is interior to be filled with heat-barrier material alumina silicate fiber felt, not only good heat-insulation effect, and cost is cheap.
It should be noted that separated by other sheet materials between heating chamber 16 and control chamber 17, then it is being close to
Thermal insulation board 6 is set on the outside of sheet material or the inside of housing 1 is directly divided into by heating chamber 16 and control chamber by thermal insulation board 6
17。
In order to avoid circuit is exposed in heating chamber, and reduce the setting of the fixed structure of heating element heater 2, it is preferable that such as
Shown in Fig. 3, the terminals 21 of heating element heater 2 are located in control chamber 17 through thermal insulation board 6, make heating element heater 2 be directly fixed on every
On hot plate 6, it is highly preferred that the via both ends for being used to wear terminals 21 on thermal insulation board 6 set polytetrafluoroethylene sealing gasket, enter
The reduction heating chamber 16 of one step and the heat exchange of control chamber 17.
In order to increase the contact area of heating element heater 2 and air, and then improve the efficiency of heating surface of warm wind, it is preferable that such as Fig. 3
Shown in Fig. 4, heating element heater 2 is how U-shaped electric heating tube (having multiple U-shaped electric heating tubes to be connected with each other in different directions),
The contact area of heating element heater 2 and air is added, and is effectively saved the space inside warm-air drier.
More U-shaped electric heating tube can set multiple how U-shaped electric heating tubes according to power needs along the length direction of thermal insulation board 6.
In order to further increase the area of dissipation of heating element heater 2, it is preferable that as shown in Figure 3 and Figure 4, in how U-shaped electrical heating
Radiating fin 22 is wound on pipe.
In order to improve the security of warm-air drier, it is preferable that in the position of air outlet 162, renewable type Overtemp. protector 3 is set,
Beyond retrievable Overtemp. protector 4 is set on heating element heater 2, is detecting temperature of the temperature at air outlet 162 more than setting
When spending, corresponding control element control heating element heater 2 is stopped, and blower fan 5 works on, when detecting at air outlet 162
When temperature is returned to below set temperature, heating element heater 2 is resumed work.When beyond retrievable Overtemp. protector 4 detects
When the temperature on the surface of heating element heater 2 exceedes set temperature, the action of beyond retrievable Overtemp. protector 4 disconnects, heating element heater 2
After being stopped, it is necessary to fix a breakdown, after re-replacing beyond retrievable Overtemp. protector 4, heating element heater 2 can just recover just
Often work.
The wiring of renewable type Overtemp. protector 3 and beyond retrievable Overtemp. protector 4 is connected into also through thermal insulation board 6 simultaneously
In control chamber 17, it is preferable that the diameter of cable-through hole is suitable with the diameter of line, reduces the heat exchange in two chambers as far as possible, it is preferable that
At the both ends of cable-through hole, polytetrafluoroethylene sealing gasket is being set.
Find failure in time for convenience, grasp the working condition of warm-air drier, it is preferable that as shown in figure 1, outside housing 1
Power supply indicator 172, fan trouble indicator lamp 173 and malfunctioning heating elements indicator lamp 174 are set, when generally normal, power supply
Indicator lamp 172 keeps Chang Liang, and when detecting that blower fan 5 breaks down, blower fan 5 is stopped, and fan trouble indicator lamp 173 is bright
Rise, equally when detecting that heating element heater 2 is abnormal, heating element heater 2 is stopped, while malfunctioning heating elements indicator lamp 174 is bright
Rise.
In order to facilitate fixed circuit, make in control chamber 17 that circuit is neat, facilitate maintenance management, it is preferable that as shown in figure 3,
Wiring frame 7 is also set up in control chamber 17, and the wiring frame 7 is fixed on thermal insulation board 6.
In order to facilitate the maintenance and inspection of warm-air drier, it is preferable that the left surface 14 of housing 1, right flank 13 and upper side 12 are equal
For demountable structure, i.e. left surface 14, right flank 13 and upper side 12 can be removed from housing 1, can sent out according to failure
Raw position, select different side OOBAs and maintenance.
As shown in figure 1, the upper side 12 of housing 1 is provided with lifting point 121, warm-air drier is facilitated to be lifted under chair framework
Portion, it is easy for installation, and warm-air drier is installed on under-seat, is not observed in compartment with normal angled, belongs to concealed structure,
The space being not take up in compartment, the overall appearance in compartment is not influenceed.
According to installation needs, the downside of housing 1 can also set fixing hole, is connected with mounting bracket, utilize branch
Warm-air drier is installed in power distribution cabinet or small-sized parlor by frame.
In the present embodiment, the major control element that electrical control gear 9 includes in control chamber 17 is connected on positive source
On short-circuit protector FU, the undercurrent relay KA whether normal for detection blower fan operating current1, for controlling blower fan therefore
Hinder the relay KA of indicator lamp 1732, relay KA for controlling malfunctioning heating elements indicator lamp 1743, for controlling heating unit
The time-delay relay KT of the part delay working and contactor KM for controlling heating element heater to work.
The present embodiment is mainly the work for being controlled warm-air drier using logical course using above-mentioned electrical equipment, wherein main
Circuit is the performance loop of heating element heater, heating main circuit as shown in Figure 6, is equipped with overload protective device FU on three-phase line1、
And the working condition of heating element heater 2 is controlled by contactor KM, voltage is three-phase AC380V.
Control circuit is the loop of control main circuit, and it is related to main element for blower fan 5, power supply indicator 172, blower fan
Malfunction indicator lamp 173, malfunctioning heating elements indicator lamp 174, renewable type Overtemp. protector 3, beyond retrievable Overtemp. protector
4th, short-circuit protector FU, undercurrent relay KA1, relay KA2, relay KA3, time-delay relay KT and contactor KM, voltage be
DC24V。
During work, after control circuit as shown in Figure 5 and heating main circuit normal power-up as shown in Figure 6, relay KA3
Must be electric, now power supply indicator 172 is lighted, blower fan 5 is started working, undercurrent relay KA1After detection blower fan 5 is working properly,
Relay KA2Must be electric, time-delay relay KT starts timework, after 10S (preset value), the contact of control heating element heater work
Device KM obtains electric, the beginning normal work of heating element heater 2.When renewable type Overtemp. protector 3 detects that air outlet exceedes setting value 65
DEG C when, the action of renewable type Overtemp. protector 3 disconnects, and contactor KM loops dead electricity, heating element heater 2 is stopped, and blower fan 5 continues
Work；When temperature at air outlet 162 is less than 65 DEG C, renewable type Overtemp. protector 3 closes, and contactor KM obtains electric, heating
Element 2 continues normal work.When beyond retrievable Overtemp. protector 4 detect the surface temperature of heating element heater 2 reach 210 DEG C~
At 240 DEG C, the action of beyond retrievable Overtemp. protector 2 disconnects, relay KA3With contactor KM loops dead electricity, heating element heater 2 stops
Only work, while malfunctioning heating elements lamp 174 lights, and now needs to overhaul warm-air drier and change beyond retrievable overtemperature
Protector 4.As undercurrent relay KA1When detecting the operating current exception of blower fan 5, contact disconnects, relay KA2Dead electricity, delay
Relay KT, contactor KM dead electricity, heating element heater 2 is stopped, while fan trouble indicator lamp 173 lights.
There is logic control relation, when the failure of blower fan 5 does not work, heating element heater 2 also stops between blower fan 5 and heating element heater 2
Only work, in order to avoid temperature raises, causes the potential safety hazards such as fire, the normal trouble free service of warm-air drier can be ensured, make warm-air drier
Control it is more intelligent.
In summary, it is divided into heating provided by the present invention for the warm-air drier of rail vehicle, including housing, the inside of housing
Chamber and control chamber, the control element of heating element heater is provided separately, sets on housing opposite sides face and connect with heating chamber respectively
Logical air inlet and air outlet, blower fan is being set close to the position of air inlet, heating element heater be arranged at air inlet and air outlet it
Between heating chamber in, connecting terminal block is provided in control makes circuit neat appearance, easy to maintenance, is additionally provided with for controlling
The electric controling element of warm-air drier, make the control of warm-air drier more intelligent.It is divided into heating chamber and control chamber in the housing of warm-air drier,
The heating part of warm-air drier and control section are provided separately, topology layout is reasonable, effectively reduces the volume of warm-air drier, is adapted to
Under-seat is installed on, reduces influence of the warm-air drier to the occupancy in compartment space and to interior outward appearance, and reduce high temperature pair
The influence of circuit and electrical equipment in control chamber, improve the security of warm-air drier.Warm-air drier provided by the invention additionally uses
Reliable logic control mode, and renewable type Overtemp. protector and beyond retrievable Overtemp. protector two class protection are employed,
Further ensure the reliability and security of warm-air drier work.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (7)
- A kind of 1. warm-air drier for rail vehicle, it is characterised in that：Including housing, it is divided into heating chamber and control in the housing Chamber, is provided with heating element heater and blower fan in the heating chamber, and is additionally provided with and is connected with the heating chamber in the leading flank of the housing Air inlet, the blower fan is disposed in proximity to the position of air inlet, is provided with the trailing flank of the housing and the heating chamber connects Logical air outlet, the heating element heater are arranged in the heating chamber between the air inlet and air outlet, set in the control chamber Have for the connecting terminal block of wiring and the electrical control gear for controlling warm-air drier；The air outlet position, which is provided with, to be recovered Formula Overtemp. protector, the heating element heater are provided with beyond retrievable Overtemp. protector, the renewable type Overtemp. protector and Beyond retrievable Overtemp. protector is connected with the electrical control gear；The housing is externally provided with power supply indicator, fan trouble indicator lamp and malfunctioning heating elements indicator lamp, the power supply instruction Lamp, fan trouble indicator lamp and malfunctioning heating elements indicator lamp are connected with the electrical control gear；The electrical control gear includes being used for the whether normal undercurrent relay KA of detection blower fan operating current1, for controlling The relay KA of fan trouble indicator lamp2, relay KA for controlling malfunctioning heating elements indicator lamp3, for controlling heating unit Contactor KM, the time-delay relay KT for controlling heating element heater delay working of part work, wherein,Relay KA3One end of coil is connected with positive source, the other end connected with the beyond retrievable Overtemp. protector after with Power cathode connects, relay KA3The first normally-closed contact be connected with positive source, the second normally-closed contact and malfunctioning heating elements It is connected after indicator lamp series connection with power cathode；One end of contactor KM coils and renewable type Overtemp. protector be connecteds after connecting with power cathode, the other end be delayed after Electrical equipment KT a pair of normally opened contacts and relay KA3A pair of normally opened contacts series connection after be connected with positive source；One end of time-delay relay KT coils is connected with power cathode, the other end and relay KA2A pair of normally opened contacts series connection after It is connected with positive source；Relay KA2First normally-closed contact is connected with positive source, after the second normally-closed contact and the fan trouble lamp string connection with electricity Source negative pole connection；One end of the blower fan is connected with positive source, the other end and relay KA1First input end connection, relay KA1's Second input is connected with power cathode, relay KA1Two power inputs connect respectively with positive source and power cathode Connect, relay KA1The first output end be connected with power cathode, relay KA1The second output end and relay KA2Coil It is connected after series connection with positive source；Described power supply indicator one end is connected with positive source, and the other end is connected with power cathode.
- 2. the warm-air drier according to claim 1 for rail vehicle, it is characterised in that：The heating chamber and control chamber it Between be provided with thermal insulation board.
- 3. the warm-air drier according to claim 2 for rail vehicle, it is characterised in that：The terminals of the heating element heater It is located at through the thermal insulation board in the control chamber.
- 4. the warm-air drier according to claim 3 for rail vehicle, it is characterised in that：How U-shaped the heating element heater be Electric heating tube.
- 5. the warm-air drier according to claim 4 for rail vehicle, it is characterised in that：On the how U-shaped electric heating tube It is wound with radiating fin.
- 6. the warm-air drier according to claim 2 for rail vehicle, it is characterised in that：It is additionally provided with and ties up in the control chamber Coil holder, and the wiring frame is fixed on the thermal insulation board.
- 7. according to the warm-air drier for rail vehicle described in claim any one of 1-6, it is characterised in that：A left side for the housing Side, right flank and upper side are demountable structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510663054.0A CN105216814B (en) | 2015-10-14 | 2015-10-14 | A kind of warm-air drier for rail vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510663054.0A CN105216814B (en) | 2015-10-14 | 2015-10-14 | A kind of warm-air drier for rail vehicle |
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| CN105216814A CN105216814A (en) | 2016-01-06 |
| CN105216814B true CN105216814B (en) | 2018-04-06 |
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| CN108423022B (en) * | 2018-04-20 | 2024-05-28 | 株洲联诚集团控股股份有限公司 | Warm-air drier circuit and driver's cabin electric fan heater thereof |
| CN109244694B (en) * | 2018-11-14 | 2024-04-05 | 国网黑龙江省电力有限公司鹤岗供电公司 | Terminal strip with dust removal dehumidification function |
| CN109733429B (en) * | 2019-01-08 | 2020-04-17 | 中车青岛四方机车车辆股份有限公司 | Low-floor rail vehicle and electric heating device thereof |
| CN110792623A (en) * | 2019-11-26 | 2020-02-14 | 中国华能集团清洁能源技术研究院有限公司 | Intelligent inspection system for fan of control cabinet of wind turbine generator and working method of intelligent inspection system |
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| CN205098205U (en) * | 2015-10-14 | 2016-03-23 | 南车青岛四方机车车辆股份有限公司 | A electric fan heater for rail vehicle |
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