CN110017525A - A kind of accumulated electric heater of heat storage pouring molding - Google Patents
A kind of accumulated electric heater of heat storage pouring molding Download PDFInfo
- Publication number
- CN110017525A CN110017525A CN201910433558.1A CN201910433558A CN110017525A CN 110017525 A CN110017525 A CN 110017525A CN 201910433558 A CN201910433558 A CN 201910433558A CN 110017525 A CN110017525 A CN 110017525A
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- China
- Prior art keywords
- heat storage
- electric heater
- heat
- grill cover
- pouring molding
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- 238000005338 heat storage Methods 0.000 title claims abstract description 81
- 238000000465 moulding Methods 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 40
- 239000007787 solid Substances 0.000 claims abstract description 6
- 239000011232 storage material Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 41
- 230000007246 mechanism Effects 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 229910052573 porcelain Inorganic materials 0.000 claims description 9
- 235000004443 Ricinus communis Nutrition 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 240000000528 Ricinus communis Species 0.000 claims description 3
- 241000826860 Trapezium Species 0.000 claims description 3
- 210000000481 breast Anatomy 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000013618 particulate matter Substances 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 27
- 238000009825 accumulation Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 13
- 239000011449 brick Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013270 controlled release Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Central Heating Systems (AREA)
Abstract
The invention discloses a kind of accumulated electric heater of heat storage pouring molding, including outer housing, it is provided with grill cover above outer housing, skirt is provided with below outer housing, the bottom of skirt is provided at least one blower；Outer housing is internally provided with heat storage, and heat storage is pouring molding formula solid heat storage material, and evenly spaced in heat storage to be provided with multiple airflow channels, the lower end of airflow channel is connected with the inside of skirt, and upper end is connected with the inside of grill cover；Electric heater is provided between every two adjacent airflow channel.Heat storage, electric heater and insulating layer of the invention uses full-closed structure, completely cuts off with outside air, and the progress that can prevent metal from aoxidizing extends the service life of associated components；Enclosed construction becomes thermodynamic (al) enclosed system, has heat to exchange with the external world, without substance and mass exchange, system zero-emission is environmentally friendly.Water and steam or particulate matter cannot immerse, and have compared with high safety degree of protection.
Description
Technical field
The present invention relates to accumulated electric heater technical field more particularly to a kind of heat-accumulating type electric-heatings of heat storage pouring molding
Device.
Background technique
Existing market existing accumulated electric heater manufacture structure be mainly prefabricated heat accumulating type piled bricks at/or code pile accumulation of heat
Body, heating element are placed in heat storage central area, wrap up insulating layer outside heat storage, the outsourcing of insulating layer is metal shell.
The problem of this structure is brought is:
1. structural shape generates excessive thermal resistance, it is degrading heat transfer.
Thermal resistance generates:
(1), since prefabricated accumulation of heat shaped brick does not place the structure of electric heater, electric heater is floating to be rested among accumulation of heat turn, electricity
Heater shape is round tube, intact cannot be agreed between the plane turned with heat accumulating type, there are larger gap and intervals, due to air
Thermal coefficient is small, thus generates very big air thermal resistance.
(2) the mutual contact surface of prefabricated accumulation of heat shaped brick is uneven, forms thermal contact resistance, and contact surface is space surface grids shape, packet
Network each piece of prefabricated accumulation of heat shaped brick, layer upon layer.It is calculated with standard transition size, specific surface area 0.015m2, by every
Equipment accumulation of heat body weight is that 100kg is calculated, and total surface area is that (100kg heat-storing material quality references heating area is about 1.5m2
15m2).That is, thermal contact resistance all is occurring on so big area, thermal resistance is generated on so big contact surface, is made
Heat transfer can't bear the heavy load.
Due to transporting or moving, the combination of the variation of restraining force, shaped brick is loosened, and generates displacement or dislocation and gap increases
Greatly, or make to become air thermal resistance between accumulation of heat shaped brick on the basis of thermal contact resistance.
(3) it is bonded between heat storage and insulating layer, forms thermal contact resistance due to heat-storing material surface imperfection, contact surface
Product is exactly heat storage external surface area, surrounds whole heat-storing materials, that is to say, that is all being occurred on heat storage external surface area
Thermal contact resistance, thermal resistance surround whole heat storages.
Thermal resistance harm:
(1) above-mentioned three kinds of thermal resistance additions, the heat that electric heater generates cannot be spread out of in time, generate self heating effect
It answers, electrothermal tube is made to work long hours in overheat conditions, thus prematurely burn.
Due to the heat-storing material used be mostly it is nonmetallic, small thermal coefficient is universal law, since heat storage is thermally conductive
Coefficient is small, and thermal resistance increases, and heat is difficult to be input to heat storage deep inside, and (heat of heat storage deep inside is also difficult to transmit
To outer surface), it is superimposed with above-mentioned three kinds of thermal resistances, increases the regenerator temperature temperature difference, it is maximum up to 300 DEG C or more, make average accumulation of heat
Temperature reduction, amount of stored heat reduce 1/3, and stock utilization reduces by 1/3.
(3) conduction is the main heat transfer mode of the structure, and compared with convection current, radiation, heat transfer is that heat transfer coefficient is the smallest by one
Kind mode.Especially heat transfer enters low-temperature zone.Temperature and pressure reduce, and according to different transfer of heat theory, heat flow density reduces, inside heat storage
The low-temperature zone heat biography of depths does not come out, and cannot provide participation heating, improve heat storage heating residuals temperatures, in amount of stored heat
The practical heat for heating is reduced, and the heat of this temperature section is crossed again when next accumulation of heat, in heat storage internal stationary stagnant
The heat for having stayed this part that cannot be utilized, 20% or so of the total amount of stored heat of Zhan.The presence of this partial heat adopts effective supply
Warm heat amount is reduced, and shortens the heating time.It is the generally existing disadvantage of such structure regenerative electrochemical heating equipment.
(4) restricted by overheat, heating element is under protection for a long time, makes power utilization less than 50%.
(5) make to conduct heat out of control, temperature field can not organize, or theoretically can't pass and can not form thermal process design.
2. open type System forming pollutes
The manufacture of the open type of heat storage and insulating layer, i.e. heat storage, thermal insulation material and electric heater are not closed and Interior Space
Gas is directly connected to, and formation is open system thermodynamically, i.e., inside equipment with it is extraneous not only have it is hot exchange, there are also substances
With the exchange of quality.Not only make thermal process control complicated, difficulty increases, and the dust of heat-storing material and thermal insulation material, needle pierce
The disconnected wadding of felt fiber falls bits, peculiar smell, escapes with thermal current, is full of heating room, is degrading indoor environment and air.
Summary of the invention
The object of the present invention is to provide a kind of accumulated electric heaters of heat storage pouring molding, solve the problems, such as.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of accumulated electric heater of heat storage pouring molding of the present invention, including outer housing are set above the outer housing
It is equipped with grill cover, skirt is provided with below the outer housing, the bottom of the skirt is provided at least one blower；It is described outer
Shell is internally provided with heat storage, and the heat storage is pouring molding formula solid heat storage material, in the heat storage uniformly between
Every be provided with multiple airflow channels, the lower end of each airflow channel is connected with the inside of the skirt, upper end with it is described
The inside of grill cover is connected；Electric heater is provided between the every two adjacent airflow channel.
Further, insulating layer is provided between the inner wall of the outer housing and the heat storage.
Further, the section of the grill cover is right-angled trapezium, and the grill cover front symmetrically offers two on inclined-plane
Group leader's grid gate hole is symmetrically arranged with the circumferential grate opening of two groups of rounded distributions at the top of the grill cover.
Further, the top of the grill cover is provided with air door regulating mechanism.
Further, the air door regulating mechanism includes the screw knob being set to above the grill cover, the screw thread
The connection of the threaded one end of knob and screw rod, the top plate that the other end of the screw rod passes through the grill cover extend to the grill cover
Inside and the contact site of the top plate of the screw rod and grill cover be slidably matched by the top plate of sliding sleeve and the grill cover,
The screw rod is located at one end inside the grill cover and is successively fixedly connected with bimetal leaf and air door cover board and the wind gate cover
Plate is set to the surface of multiple airflow channel upper ends.
Further, the inside two side ends of the grill cover are symmetrical arranged there are two bimetal leaf framework, the bimetallic
The lower part for being plugged in two bimetal leaf frameworks is fixed at the both ends of piece respectively.
Further, two groups of castors are symmetrically arranged with below the skirt.
Further, each electric heater includes metal tube, the bottom plate of the lower end of the metal tube and the outer housing
It is fixedly connected, spiral fin is fixedly installed on the periphery wall of the metal tube, metal tube is internally provided with heating wire.
Further, the heating wire includes being set to the metal tube inside and spiral bringing-up section, described to add
The both ends of hot arc are respectively end of incoming cables and loop line end, and the end of incoming cables extends downward into the outside of the metal tube, the loop line
End passes through from the bosom of the bringing-up section and extends downward into the outside of the metal tube, and the loop line end is located at described add
The outer cover at the position among hot arc is equipped with porcelain tube, and the end of incoming cables and loop line end are located at the outer of the position outside the metal tube
Side is arranged with protecting pipe and end is connected with power supply.
Further, insulating packing, the metal are provided between the inner wall of the metal tube and the outer wall of the porcelain tube
The lower end of pipe is provided with refractory seals glue.
Compared with prior art, advantageous effects of the invention:
Heat storage, electric heater and insulating layer of the invention uses full-closed structure, completely cuts off with outside air, can prevent gold
The progress for belonging to oxidation, extends the service life of associated components；Enclosed construction becomes thermodynamic (al) enclosed system, has heat with the external world
Amount exchange, without substance and mass exchange, system zero-emission is environmentally friendly.Water and steam or particulate matter cannot immerse, tool
Have compared with high safety degree of protection.
The spiral fin of electric heater kind of the invention is added in outside metal tube, is poured integrally by heat-storing material.Due to gold
Belong to thermal coefficient and be higher than nonmetallic, spiral fin and heat storage seamless combination, as heat bridge, the heat that heating element is issued is fast
Speed passes at a distance, and the heat-accumulating heat-transfer of boosting heat-storing material compensates for the low weakness of heat-storing material thermal coefficient, so that heat storage is deep
Place's heat is normally stored into and is exported, and heating element substantially not by overheating protection, makes power utilization improve 35% or more.Together
When also make thermal storage time shorten 35% or more.
The bringing-up section setting of heating wire is set in the shape of a spiral in metal tube hub, and heating wire heat can be made to surrounding metal
Tube wall equidistantly conducts heat, and is uniformly transmitted to heat storage, is laid out temperature field samming in heat storage, avoids because non-equidistant is conducted heat, out
The anisotropy in existing temperature field, in the constant situation of highest regenerator temperature, minimum regenerator temperature reduces and makes the effective of heat storage
Amount of stored heat is reduced and the accumulation of heat utilization rate of heat storage quality of materials reduces；Bringing-up section outer diameter has appropriate distance to tube wall, can be effective
Ground avoids short circuit and tube wall breakdown；The heating of heating element bias is avoided, makes metal tube side high temperature side low temperature and generates electricity
Heating tube bending deformation cisco unity malfunction；The diameter and length of run of electric-heating-wire-heating section have reasonable selection, and bias is avoided to put
Diameter diminution, the length reduction of heating element taenidium are set, durability decline, failure rate increase；The structure can be normal in power
In the case where output, leakage current, electrical strength (anti-high-voltage breakdown), ground resistance are all satisfied requirements of the national standard, and can have
Effect heat transfer；Due to reasonable in design reliable, electric heater failure rate is low or zero failure, the case where electric heater can not be replaced
Under, it is ensured that not because electric heater failure prevents accumulated electric heater from working.
The present invention makees more seams of accumulated electric heater using the heat storage body structure of pouring molding and using molding accumulation of heat shaped brick
Connection is compared, and moulding by casting heat storage makes heat-storing material inside realize seamless combination, also realizes and is seamlessly connected with insulating layer, and electricity adds
The thermal contact resistance or air thermal resistance, accumulation of heat shaped brick and insulating layer between air thermal resistance, accumulation of heat shaped brick between hot device and heat storage
Between thermal contact resistance be not present, the only thermal resistance of heat-storing material itself.Thermal resistance, which significantly reduces, makes Heat Transfer Optimization.Have again
Reasonable insulating layer thermal resistance matching, reduces the heat storage accumulation of heat temperature difference, and case surface temperature does not overheat, in this way, average store
The raising of hot temperature can make amount of stored heat and heat-storing material utilization rate improve 20% or more, and case surface temperature is no more than mark again
Quasi- regulation, makes the enough amount of stored heat of heat storage pass through outer surface controlled release；Castable have mobility, workability, fillibility,
With type, thus there is good mouldability, simple, volume reduces, shaping strength is high, moulding is plastic, style is easy to structure
The features such as optimization.
Air door regulating mechanism of the invention can realize the adjusting and control of manually and automatically two ways to convective heat transfer channel
System: manual adjusting operation is simple, conveniently, be easy to adjust.Automatic adjustment is mechanical in the case where no automatic control facility
What lid formula regulating mechanism was realized, mechanism is reasonable.It can accurately, delicately reach adjusting target, and fault-free, function-stable, structure
Part is durable.
Pipeline configuration is added in heat storage, amount of stored heat inside heat storage is made to increase one kind by single conductive heat transfer
Convective heat transfer mode enhances heat transfer.Airflow channel builds up one, very close to each other and thermal contact resistance by heat-storing material, and surrounding stores
Hot body heat content is easy to pass to tube wall.Convection current can make the reduction of heating residuals temperatures, assist if any blower, and heating residuals temperatures can drop to
Slightly above room temperature has vitalized this partial heat in this way, 20% or more amount of stored heat can efficiently use, and eliminates and is taken by accumulation of heat shaped brick
The disadvantage for building molding regenerative electrochemical heating equipment increases the heat for actually using heating, extends the heating time, accumulation of heat again
Initial temperature can be since slightly above room temperature, and regenerator temperature section increases, and certain amount of stored heat increases.
Detailed description of the invention
The invention will be further described for explanation with reference to the accompanying drawing.
Fig. 1 is schematic structural view of the invention；
Fig. 2 is schematic cross-sectional view of the present invention；
Fig. 3 is electric heater structure schematic diagram；
Fig. 4 is that air door regulating mechanism manually adjusts status architecture schematic diagram；
Fig. 5 is the maximum opening status diagram of air door regulating mechanism automatic adjustment；
Fig. 6 is the adjustment process status diagram of air door regulating mechanism automatic adjustment；
Fig. 7 is the minimum aperture status diagram of air door regulating mechanism automatic adjustment；
Fig. 8 is hot stream temperature (i.e. regenerator temperature), throttle opening and time τ curved line relation schematic diagram；
Fig. 9 is thermal current flow, hot stream temperature (i.e. regenerator temperature) and time τ curved line relation schematic diagram；
Description of symbols: 1, outer housing；2, grill cover；3, skirt；4, blower；5, heat storage；6, airflow channel；7 electricity
Heater；8, strip grate opening；9, circumferential grate opening；10, insulating layer；11, castor；12, metal tube；13, spiral fin；14,
Heating wire；14-1, bringing-up section；14-2, end of incoming cables；14-3, loop line end；15, porcelain tube；16, protecting pipe；17, insulating packing；18,
Refractory seals glue；19, screw knob；20, screw rod；21, sliding sleeve；22, bimetal leaf；23, air door cover board；24, bimetal leaf
Framework.
Specific embodiment
As Figure 1-Figure 2, a kind of accumulated electric heater of heat storage pouring molding, including outer housing 1, the outer housing
1 top is provided with the gas chamber that grill cover 2 has formed electric heater, and grill cover 2 is logical with merging with the upper dimension of the outer housing 1
Anti-drop screw is crossed to be fastenedly connected.And the section of the grill cover 2 is right-angled trapezium, and the grill cover front is symmetrically opened on inclined-plane
Equipped with two groups long grid gate hole 8, the top of the grill cover 2 is symmetrically arranged with the circumferential grate opening 9 of two groups of rounded distributions, takes
The hot gas that warmer generates when working is escaped by the strip grate opening 8 on the grill cover 2 with circumferential grate opening 9, with room air
Form circulation.
The lower section of outer housing 1 is provided with skirt 3, and the bottom of the skirt 3 is provided at least one blower 4, the blower 4
Air outlet be connected with the inside of the skirt 3.The lower section of the skirt 3 is symmetrically equipped with two groups of castors 11, castor 11
Facilitate the movement of entire heater for universal type, and wheel rim and ground are insulated.
The outer housing 1 is internally provided with heat storage 5, and between the inner wall of the outer housing 1 and the heat storage 5
It is provided with insulating layer 10, the thermal resistance that can be required according to insulating layer when specifically selecting calculates heat preservation according to the thermal coefficient of insulating layer
The thickness of layer 10.
The inside of the heat storage 5 is evenly spaced to be provided with multiple airflow channels 6, and the airflow channel 6 is by heat-resisting gold
Belong to pipe to be made, the number of the air-flow is specifically configured to 3 in the present embodiment.The lower end of each airflow channel 6 with it is described
The inside of skirt 3 is connected, and upper end is connected with the inside of the grill cover 2；Between the every two adjacent airflow channel
It is provided with electric heater 7.
Heat storage 5 in the present invention is pouring molding formula solid heat storage material comprising the component of following weight percent:
Basalt 55%, polycarboxylate water-reducer 0.5%, sodium metasilicate 1%, water 1%, remaining is iron powder.The component is mixed in proportion
Obtain solid heat storage material.
The present invention is made the outer housing of the box-structure of upper opening in production with metal plate first, then by air-flow wind
Road and electric heater 7 are mounted on the bottom of outer housing 1 by welding manner, and install on the bottom of outer housing 1 and inner sidewall
Insulating layer 10；Above-mentioned solid heat storage material is poured into outer housing later, the heat storage after the completion of pouring is heated to 100-300
DEG C, solidification clearing damp is completed after 24 hours；It completes be sintered, strengthen, removing peculiar smell after being heated to 600 DEG C, 12 hours；Finally in accumulation of heat
It is laid with insulating layer on body formed face, then is closed the top plate of outer housing with the method for welding.
As shown in Figure 3.Each electric heater 6 in the present invention includes metal tube 12, the lower end of the metal tube 12 with
The bottom plate of the outer housing 1 is fixedly connected, and spiral fin 13, the metal are fixedly installed on the periphery wall of the metal tube 12
Pipe 12 and the spiral fin are enclosed in heat storage and build up one by heat storage.
The inside of the metal tube 12 is equipped with heating wire 14 made of high-resistance electrothermic alloy, and the heating wire 14 wraps
It includes and is set to 12 inside of metal tube and spiral bringing-up section 14-1, the both ends of the bringing-up section 14-1 are respectively inlet wire
14-2 and loop line end 14-3, the end of incoming cables 14-2 is held to extend downward into the outside of the metal tube 12, the loop line end 14-3
The outside of the metal tube 12 is passed through and extended downward into from the bosom of the bringing-up section 14-1.Described loop line end 14-3
The outer cover at the position among the bringing-up section 14-1 is equipped with porcelain tube 15, and the porcelain tube 15 can protect loop line end 14-3 and exhausted
Edge loop line end.The porcelain tube 15, bringing-up section 14-1 are coaxially set with the metal tube 12.The end of incoming cables 14-2 and loop line
The outside that end 14-3 is located at the position outside the metal tube 12 is arranged with protecting pipe 16 and end is connected with power supply.The gold
Belong to and be provided with insulating packing 17 between the inner wall of pipe 12 and the outer wall of the porcelain tube 15, and the lower end setting of the metal tube 12
There is refractory seals glue 18, entire heating wire is sealed in metal tube in this way, is isolated from the outside world.
Electric heater of the invention can avoid the influence of heat transfer directionality, that is, avoids the upload regularity of heat, make to be located at
The heating wire of the lower part can heat superposed heating wire, make cool upper heat under heating wire and heat storage body structure, and make
Face heating element overheat.
The top of the grill cover 2 is provided with air door regulating mechanism, and the air door regulating mechanism includes being set to the lattice
The screw knob 19 of 2 top of grid cover, the screw knob 19 are connect with the threaded one end of screw rod 20, the other end of the screw rod 20
Across the grill cover 2 top plate and extend to the inside of the grill cover 2 and the top plate of the screw rod 20 and grill cover 2
Contact site is slidably matched by sliding sleeve 21 and the top plate of the grill cover 2, and the screw rod 20 is located inside the grill cover 2
One end is successively fixedly connected with bimetal leaf 22 and air door cover board 23 and the air door cover board 23 is set to multiple air-flows and leads to
The surface of 6 upper end of road.The inside two side ends of the grill cover 2 are symmetrical arranged there are two bimetal leaf framework 24, and described pair golden
The lower part for being plugged in two bimetal leaf frameworks 24 is fixed at the both ends for belonging to piece 22 respectively.
There are two types of modes for heat transfer path of the invention, and one is by airflow channel, the wind inside blower, skirt, heat storage
Grate opening composition on door regulating mechanism and grill cover, is thermal convection channel.The heat flow density of convective heat transfer depends on heat
Body wall surface temperature and hot-fluid flow velocity, heat transfer coefficient are higher than conduction pattern, and control target is to adjust air-flow velocity.Another kind be by
Electric heater, heat storage, insulating layer, outer housing form, and are heat exchange pattern channels.The heat that heating wire issues passes through metal
Pipe and spiral floor, pass to heat storage, after heat storage accumulation of heat, insulating layer, outer housing wall surface are passed through, to indoor conduction and spoke
It penetrates, four around heat storage surface can remain higher temperature, sustainably discharge heat.
Thermal convection channel heat output regulation and control is mainly realized by air door regulating mechanism.
On the one hand the air door regulating mechanism can be manually adjusted, i.e., as shown in figure 4, the lower end of screw knob 19 at this time
It is tightly attached to the upper end of the sliding sleeve 21, so that the screw rod 20 is moved up and down by rotating the screw knob 19, and then adjust wind
Door cover plate 23 realizes the adjusting to throttle opening at a distance from airflow channel 6.When heater work, the airflow channel 6
The hot stream temperature of interior generation increases, and has the tendency that bending after bimetal leaf 22 is heated, but since screw knob 19 is tight
It is affixed on the sliding sleeve 21, limitation screw rod 20 moves down, therefore bimetal leaf 22 can not generate bending deformation, cannot affect air door
Cover board 23 moves down, and throttle opening is kept constant.
On the other hand the air door regulating mechanism is able to carry out automatic adjustment, as shown in figure 5,19 distance of screw knob at this time
There is a certain distance in the upper end of shown sliding sleeve 21, and by adjusting the relative distance between screw knob 19 and shown sliding sleeve 21
The deformation extent of bimetal leaf 22 can be limited, and then controls the movement travel of screw rod 20 and air door cover board 23, so as to adjust
Save the maximum opening of air door.
Under automatic adjustment state, the hot stream temperature of airflow channel is increased, curved under deforming bimetal leaf 22, and then is driven
Dynamic screw rod 20 and the cover board 23 that keeps out the wind move down, and the deformation extent of bimetal leaf 22 is the function of temperature t, is increased with temperature, windshield cover
The distance of plate 23 to 6 upper end opening of airflow channel is gradually reduced, and air flow rate is accordingly reduced, and is declined with temperature, and bimetal leaf becomes
Shape is replied, and throttle opening k is gradually increased, and air flow rate increases accordingly.
As shown in Figure 5-Figure 7, automatic adjustment state is since Fig. 5, and throttle opening is maximum at this time, as temperature increases, warp
It crosses the position Fig. 6 and reaches the position Fig. 7, throttle opening is minimum at this time.Decline with temperature, by the position Fig. 6, returns the position Fig. 5, from
And complete the adjusting of a heat-storage heating cycle period.Air door maximum opening temperature corresponding with minimum aperture state is to adjust
The temperature range at place and corresponding thermal current range of flow, hot gas flow is big when throttle opening is big, otherwise flow is small, together
When also correspond to bimetal leaf corresponding deformation range under the influence of temperature.
As shown in figure 8, t is hot stream temperature (i.e. regenerator temperature) curve, k is throttle opening curve, is made each other anti-
To symmetrical, thermal current (i.e. heat storage) maximum temperature corresponds to air door minimum aperture, thermal current (i.e. heat storage) minimum temperature
Corresponding air door maximum opening.
The principle of the automatic regulation function of air door adjusting structure are as follows: by driving throttle opening with the deformation of temperature by bimetallic
Variation, realize gas flow temperature increase flow reduce, gas flow temperature lower flow increase adjusting.
Adjustment Theory is to meet following relationship according to Newtonian Cooling formula:
It exports heat flow density q=the air-flow temperature difference (△ t) the x specific heats of gases and holds (cp) x air flow rate (Q)=constant.
To reach permanent heat output.
As shown in figure 9, Q is thermal current flow curve, q is heat flow density curve.Make to export heat flow density q=constant,
When hot stream temperature (i.e. regenerator temperature) constantly changes, by damper aperture, air flow rate is allowed to change correspondingly, make to count
Formula three is because subproduct still remains unchanged, i.e. q=constant shows as the straight line of q on figure, final to realize that output heat flow density is permanent
It is fixed, realize constant temperature heating.
Heat transfer transmits the temperature and pressure and thermal resistance that heat depends on each layer object on composition heat transfer chain, and hot-fluid is removed equal to temperature and pressure
With thermal resistance.Thermal resistance is constant, and temperature and pressure are big, and heat flow density is big.Temperature and pressure are constant, and thermal resistance is big, and heat flow density is small.According to Fourier law,
Calculate and determine that the thermal resistance and thickness of each heat transfer layer, design meet the structure that heat transfer needs.
Convective heat transfer and conduction heat transfer are collectively constituted to indoor heating.Total control target is: heating calorific requirement and convection current
The sum of heat output and conduction heat transfer amount balance each other, and the sum of convective heat transfer amount and conduction heat transfer amount are equal with the amount of stored heat of heat storage
Weighing apparatus.
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (10)
1. a kind of accumulated electric heater of heat storage pouring molding, it is characterised in that: including outer housing (1), the outer housing (1)
Top be provided with grill cover (2), be provided with skirt (3) below the outer housing (1), the setting of the bottom of the skirt (3)
There is at least one blower (4)；The outer housing (1) is internally provided with heat storage (5), and the heat storage (5) is pouring molding
Formula solid heat storage material, evenly spaced in the heat storage (5) to be provided with multiple airflow channels (6), each airflow channel
(6) lower end is connected with the inside of the skirt (3), and upper end is connected with the inside of the grill cover (2)；Every two is adjacent
The airflow channel between be provided with electric heater (7).
2. the accumulated electric heater of heat storage pouring molding according to claim 1, it is characterised in that: the outer housing
(1) insulating layer (10) are provided between inner wall and the heat storage (5).
3. the accumulated electric heater of heat storage pouring molding according to claim 1, it is characterised in that: the grill cover
(2) section is right-angled trapezium, symmetrically offers two groups long grid gate hole (8), the grid on the inclined-plane of the grill cover front
The circumferential grate opening (9) of two groups of rounded distributions is symmetrically arranged at the top of cover (2).
4. the accumulated electric heater of heat storage pouring molding according to claim 1, it is characterised in that: the grill cover
(2) top is provided with air door regulating mechanism.
5. the accumulated electric heater of heat storage pouring molding according to claim 4, it is characterised in that: the air door is adjusted
Mechanism includes being set to screw knob (19) above the grill cover (2), and the one of the screw knob (19) and screw rod (20)
End is threadedly coupled, and the top plate that the other end of the screw rod (20) passes through the grill cover (2) extends to the interior of the grill cover (2)
The contact site of portion and the screw rod (20) and the top plate of grill cover (2) passes through the top of sliding sleeve (21) and the grill cover (2)
Plate is slidably matched, the screw rod (20) be located at the internal one end of the grill cover (2) successively with bimetal leaf (22) and wind gate cover
Plate (23) is fixedly connected and the air door cover board (23) is set to the surfaces of the multiple airflow channel (6) upper ends.
6. the accumulated electric heater of heat storage pouring molding according to claim 5, it is characterised in that: the grill cover
(2) inside two side ends are arranged symmetrically, and there are two bimetal leaf framework (24), and the both ends of the bimetal leaf (22) are fixed respectively
It is plugged in the lower part of two bimetal leaf frameworks (24).
7. the accumulated electric heater of heat storage pouring molding according to claim 1, it is characterised in that: the skirt (3)
Lower section be symmetrically arranged with two groups of castors (11).
8. the accumulated electric heater of heat storage pouring molding according to claim 1, it is characterised in that: each electric heating
Device (6) includes metal tube (12), and the lower end of the metal tube (12) is fixedly connected with the bottom plate of the outer housing (1), the gold
Belong to and being fixedly installed spiral fin (13) on the periphery wall of pipe (12), metal tube (12) is internally provided with heating wire (14).
9. the accumulated electric heater of heat storage pouring molding according to claim 8, it is characterised in that: the heating wire
It (14) include being set to the metal tube (12) inside and spiral bringing-up section (14-1), the two of the bringing-up section (14-1)
End is respectively end of incoming cables (14-2) and loop line end (14-3), and the end of incoming cables (14-2) extends downward into the metal tube (12)
Outside, the loop line end (14-3) pass through from the bosom of the bringing-up section (14-1) and extend downward into the metal tube
(12) outside, the outer cover that the loop line end (14-3) is located at the intermediate position of the bringing-up section (14-1) are equipped with porcelain tube
(15), the outside that the end of incoming cables (14-2) and loop line end (14-3) are located at the external position of the metal tube (12) is arranged with
Protecting pipe (16) and end is connected with power supply.
10. the accumulated electric heater of heat storage pouring molding according to claim 9, it is characterised in that: the metal tube
(12) it is provided with insulating packing (17) between the outer wall of inner wall and the porcelain tube (15), the lower end setting of the metal tube (12)
There are refractory seals glue (18).
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| CN201910433558.1A CN110017525B (en) | 2019-05-23 | 2019-05-23 | Heat accumulation body pouring molding heat accumulation type electric heater |
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|---|---|---|---|
| CN201910433558.1A CN110017525B (en) | 2019-05-23 | 2019-05-23 | Heat accumulation body pouring molding heat accumulation type electric heater |
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| CN110017525B CN110017525B (en) | 2024-09-10 |
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| CN201910433558.1A Active CN110017525B (en) | 2019-05-23 | 2019-05-23 | Heat accumulation body pouring molding heat accumulation type electric heater |
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| CN110319591A (en) * | 2019-08-05 | 2019-10-11 | 河北秦暖新能源科技有限公司 | A kind of electric boiler of open type closed heater adduction formula structure |
| CN110553302A (en) * | 2019-09-27 | 2019-12-10 | 河北秦暖新能源科技有限公司 | Heat-storage directly-heated multifunctional stove for heating and cooking |
| CN111664494A (en) * | 2020-04-29 | 2020-09-15 | 上海尚诺碳晶科技有限公司 | Direct-storage composite electric radiator |
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