CN104315702B - Positive-displacement heat exchange liner with function of electrically assisted heating - Google Patents
Positive-displacement heat exchange liner with function of electrically assisted heating Download PDFInfo
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- CN104315702B CN104315702B CN201410561101.6A CN201410561101A CN104315702B CN 104315702 B CN104315702 B CN 104315702B CN 201410561101 A CN201410561101 A CN 201410561101A CN 104315702 B CN104315702 B CN 104315702B
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Abstract
A positive-displacement heat exchange liner with a function of electrically assisted heating comprises a housing (15), an electric heating core unit (12) and a heat exchange core unit (16). The heat exchange core unit (16) comprises a cavity, a medium incoming tube (20) and a medium outgoing tube (21). The electric heating core unit (12) mainly comprises a collector cover (10) and an electric heating tube (11); the collector cover (10) is communicated with the housing (15) and encloses the electric heating tube (11); a water inlet of an outflow tube extends into an area enclosed by the collector cover (10). The positive-displacement heat exchange liner has the advantages that the liner can be subjected to overall primary heat exchanging through the heat exchange core unit, water flowing out of the liner can be subjected to secondary on-demand heat supplementing through the electric heating core unit, primary heat resources such as solar energy and heat pumps can be efficiently utilized, and waste of energy for secondary heat supplementing can be effectively reduced.
Description
Technical field
The invention belongs to field of water heaters, the positive displacement heat-exchange inner container of more particularly, to a kind of electric auxiliary heating, it is applied to
The storage-type electric water heaters such as solar water heater, Teat pump boiler.
Background technology
In the prior art, the comprehensive heat exchange benefit of positive displacement heat-exchange inner container is not high, and the cooperation and supplementary energy between is not
Ideal, haves such problems as that firing rate is slow or power consumption is high.For overcoming these defects, the special positive displacement heat exchange to electric auxiliary heating
Inner bag has carried out improvement and has developed.
Content of the invention
The technical problem to be solved is to provide for a kind of positive displacement heat-exchange inner container of electric auxiliary heating, and it is not only
Can be using a thermal source such as solar energy, heat pump moreover it is possible to effectively reduce the waste of energy of secondary concurrent heating.
The present invention solves its technical problem and employed technical scheme comprise that:It includes housing and the heating core group in housing
Part, heat exchange core assembly, housing is provided with water inlet pipe, outlet pipe and is respectively mounted electric heating core assembly, the installing port of heat exchange core assembly, changes
Hot core assembly is provided with cavity volume, medium enters pipe and the outer outlet pipe of medium, and electric heating core assembly is mainly made up of collector mat and electric heating tube,
Collector mat connects and surrounds electric heating tube with housing, and the water inlet of outlet pipe is located at collector mat top surface, side or collector mat and is enclosed
In region.Due to electric heating core assembly and the cooperation heating of heat exchange core assembly, heat exchange core assembly utilizes solar energy, heat pump etc. cheap once
Thermal source, in the case of the water temperature that electric heating core assembly only heats in heat exchange core assembly cannot meet user's request, to the water in inner bag
Carry out secondary concurrent heating on demand, effectively reduce waste of energy, and the water inlet of electric heating tube and outlet pipe is arranged at collector mat
The small space being surrounded inside, makes electric energy be mainly used in heating and will flow out the water of inner bag, it is to avoid electrical heat energy scatters and disappears in whole
Among individual inner bag, this only dynamic concurrent heating on demand is carried out to the water flowing out inner bag, further reduce waste of energy.
Described heat exchange core assembly, electric heating core assembly are coaxially disposed, and heat exchange core assembly is located at the lower end of housing, electric heating core assembly
Upper end located at housing.Underlying heat exchange core assembly occupies the core position of inner bag bottom, and it is internal according to overall heat exchange rule
Water in courage carries out overall heat exchange;Due to the water-cooled thermally stratified layer in inner bag, the electric heating core assembly above put can be according to local or instant
Heating law, and according to actual needs, concurrent heating on demand is carried out to the water that will flow out inner bag, electric heating core assembly can also be more simultaneously
Broadly adapt to use climatic environment and power utilization environment, Cistern controller reservation setting control under, in inner bag from the beginning
Water, carry out from top to bottom, the preheating on demand of time sharing segment, with improve hot water coverage ratio during bad climate and instant heat when
Power load.Additionally, heat exchange core assembly, electric heating core assembly are on the hookup wire in same axle center, realize adopting in contributing to producing
Complete both lock sealing operations, the efficient assembling structure of this simplification with an assembling action, be conducive to factory lines
Production rapidly and efficiently install, be easy to the live specialized maintenance of after-sale service.
The top of described collector mat is communicated with the balance port inside and outside collector mat.Balance port contributes to discharging in inner bag in time
Accumulate in the gas outside collector mat, it is to avoid because the accumulated gases of inner bag are excessive, and reduce the moisture storage capacity of inner bag.
Described thermal-arrest is covered with the heat exchange core stabilizer of fixing heat exchange core assembly.Heat exchange core stabilizer can improve heat exchange core group
The stability of part, there is high vibration and damage in the heat exchange core assembly helping avoid inner bag in transport process.
Described heat exchange core stabilizer is the spaced extension in collector mat bottom bar, and heat exchange core assembly is by chuck in extension bar
Among;Or heat exchange core stabilizer is the netted ring being arranged at collector mat bottom, heat exchange core assembly is by chuck among netted ring.
Described heat exchange core assembly is also become with structural strengthening ring group by core hat, core shell wall, constant voltage overflow pipe, cavity volume by core be preced with,
Core shell wall and chassis surround, and structural strengthening is located on the binding site on chassis and core shell wall, specifically structural strengthening ring built-in or
It is placed on the binding site of core shell wall and chassis, it is strong with the structure of core shell wall binding site that structural strengthening ring significantly enhances chassis
Degree, makes chassis and core shell wall more can meet the synthesis locking from sealing gasket, housing, thread-locking ring and screw-threaded coupling counterpart
Pressure and do not ftracture or deform.Constant voltage overflow pipe, medium enter pipe and the outer outlet pipe of medium puts in cavity volume from chassis respectively, chassis
Closing installing port.
Described core shell wall is Non-smooth surface curved surface, and core shell wall is provided with burr or the groove of axial direction, radial direction or spiral.Remove into multiplication
The big heat exchange area of core shell wall, also significantly enhances core shell wall intensity, reduces its wall thickness material and thermal resistance.Therefore, core shell
Wall energy to be manufactured using the higher stainless steel thin-wall of 0.3 millimeter to 1.5 millimeters of thermal conductivity, No. 445 or 304, No. 316 etc.
Material, to improve its overall heat exchange benefit.
Described housing is provided with screw-threaded coupling counterpart in the periphery of installing port, and electric heating core assembly or heat exchange core assembly are arranged on
Fixed by thread-locking ring in installing port and with screw-threaded coupling counterpart.
It is provided between described thread-locking ring and screw-threaded coupling counterpart and be inserted radially into both rivets.The quantity of rivet is
One or several, thread-locking ring is rivetted by it with the locking of screw-threaded coupling counterpart, to avoid relatively loosening and free of the two
Dismounting, both ensure that and had produced the reliability installed, and is easy to the fixing approved sample of quality inspection simultaneously again and plays stamp and review.
Described electric heating core assembly also by temperature control inserting tube and takes over a business to form, and is provided with temperature probe, takes over a business closing in temperature control inserting tube
Installing port, collector mat, electric heating tube, temperature control inserting tube are installed in the same side taken over a business, and collector mat surrounds temperature control inserting tube.Thermal-arrest
Cover can surround temperature control inserting tube completely it is also possible to only surround temperature control inserting tube top.Temperature probe is arranged in temperature control inserting tube not
Same section, temperature probe can effective monitor in real time inner bag temperature.
Described outlet pipe passes through to take over a business to connect with enclosure interior.This number of openings that can reduce directly on housing, fall
The probability of fault of construction in low inner bag.
Described water inlet pipe is formed by connecting by extension water inlet pipe, housing water inlet pipe, interior note pipe, and housing water inlet pipe is located at housing
On, interior note pipe is arranged in housing, and the upper orifice of interior note pipe is connected with housing water inlet pipe water, interior notes pipe lower nozzle and housing bottom
It is close, extension water inlet pipe is located at outside housing, and the upper orifice of extension water inlet pipe is connected with housing water inlet pipe water, extension water inlet pipe
Lower nozzle is connected with running water pipe water;Outlet pipe is formed by connecting by extension outlet pipe, housing outlet pipe, and housing outlet pipe is located at shell
On body, extension outlet pipe is located at outside housing, and the upper orifice of extension outlet pipe is connected with housing outlet pipe water, the pipe of extension outlet pipe
Body is connected around to housing outer lower end, the lower nozzle of extension outlet pipe with water spot water;Described extension water inlet pipe, extension outlet pipe are equal
It is more than more than 53 times of itself radius squared for non-metallic material and effective length.So even electric heating tube electric leakage, and shell
Under the ground connection of body and electric heating core assembly and all situation of inefficacy, the water resistance in extension water inlet pipe and extension outlet pipe can will leak out
Line voltage and within electric current decays to the safety index that human body can bear automatically, a kind of reliability of thus having given user many
Electricity protection.
The present invention can carry out an overall heat exchange by the internal courage of heat exchange core assembly moreover it is possible to pass through electric heating core assembly to i.e.
By flow out inner bag water carry out secondary concurrent heating on demand, therefore it can not only efficiently utilize a thermal source such as solar energy, heat pump moreover it is possible to
Effectively reduce the waste of energy of secondary concurrent heating.
Brief description
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the schematic enlarged-scale view at A in Fig. 1;
Fig. 3 is the schematic enlarged-scale view at B in Fig. 1;
Fig. 4 is the internal structure schematic diagram of heat exchange core assembly 16;
Fig. 5 is the external structure schematic diagram of heat exchange core assembly 16;
Fig. 6 is the internal structure schematic diagram of electric heating core assembly 12 embodiment one;
Fig. 7 is the external structure schematic diagram of electric heating core assembly 12 embodiment one;
Fig. 8 is the external structure schematic diagram of electric heating core assembly 12 embodiment two;
Fig. 9 is the external structure schematic diagram of electric heating core assembly 12 embodiment three.
The each parts of in figure with the relation of label are:Extension water inlet pipe 1, housing water inlet pipe 2, extension outlet pipe 3, housing go out
Water pipe 4, temperature control inserting tube 5, take over a business 6, thread-locking ring 7, screw-threaded coupling counterpart 8, balance port 9, collector mat 10, electric heating tube
11st, electric heating core assembly 12, heat exchange core stabilizer 13, core hat 14, housing 15, heat exchange core assembly 16, core shell wall 17, sealing gasket 18,
Chassis 19, medium enter pipe 20, the outer outlet pipe 21 of medium, structural strengthening ring 22, rivet 23, interior note pipe 24, constant voltage overflow pipe 25.
Specific embodiment
As shown in figure 1, the present embodiment includes housing 15, housing 15 is provided with water inlet pipe and outlet pipe.Water inlet pipe is entered by extension
Water pipe 1, housing water inlet pipe 2, interior note pipe 24 are formed by connecting, and on housing 15, interior note pipe 24 is arranged on housing to housing water inlet pipe 2
In 15, the upper orifice of interior note pipe 24 is connected with housing water inlet pipe 2 water, and interior note pipe 24 lower nozzle is near with housing 15 bottom connection, outward
Prolong water inlet pipe 1 to be located at outside housing 15, the upper orifice of extension water inlet pipe 1 is connected with housing water inlet pipe 2 water, under extension water inlet pipe 1
The mouth of pipe is connected with running water pipe water.Outlet pipe is formed by connecting by extension outlet pipe 3, housing outlet pipe 4, housing outlet pipe 4 located at
On housing 15, extension outlet pipe 3 is located at outside housing 15, and the upper orifice of extension outlet pipe 3 is connected with housing outlet pipe 4 water, extension
The pipe shaft of outlet pipe 3 is connected around to housing 15 outer lower end, the lower nozzle of extension outlet pipe 3 with water spot water.Extension water inlet pipe 1,
Extension outlet pipe 3 is non-metallic material and effective length is more than more than 53 times of itself radius squared.
The present embodiment also includes electric heating core assembly 12, the heat exchange core assembly 16 being coaxially disposed in housing 15.Heat exchange core group
, located at the lower end of housing 15, electric heating core assembly 12 is located at the upper end of housing 15 for part 16.Housing 15 upper end is provided with installation heating core group
The installing port of part 12, lower end is provided with the installing port installing heat exchange core assembly 16.
As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 5, heat exchange core assembly 16 is by core hat 14, core shell wall 17, constant voltage overflow pipe 25, bottom
Disk 19, medium enter pipe 20 and the outer outlet pipe 21 of medium and structural strengthening ring 22 forms.Core hat 14, core shell wall 17 and chassis 19 surround
Cavity volume.Core shell wall 17 is Non-smooth surface curved surface, and core shell wall 17 is provided with the burr of axial direction, radial direction or spiral(Or groove).Core is preced with 14
Spherical crown or cone hat.Structural strengthening ring 22 is built in the binding site of core shell wall 17 and chassis 19, is close to core shell wall 17 bottom Nei Biao
Face.Constant voltage overflow pipe 25, medium enter pipe 20 and the outer outlet pipe 21 of medium puts in cavity volume from chassis 19 respectively, and shell is closed on chassis 19
The installing port of body 15.The length of constant voltage overflow pipe 25 is the longest, and the length that medium enters pipe 20 is taken second place, the length of the outer outlet pipe 21 of medium
The shortest.Close to core Guan14Chu, its lower nozzle is opened in the outer UNICOM direct with air of cavity volume or passes through the upper orifice of constant voltage overflow pipe 25
Air bleeding valve and the indirect UNICOM of air;The upper orifice that medium enters pipe 20 is opened between 2/to three/2nd in cavity volume, its
Lower nozzle does liquid in the outer outlet pipe of the outer hot circulating medium with thermal source solar energy, a heat pump etc. of cavity volume and is connected;The outer outlet pipe of medium
21 upper orifice is situated between in the outer SAPMAC method with thermal source solar energy, a heat pump etc. of cavity volume close to chassis 19 upper surface, its lower nozzle
Matter enters pipe and does liquid connection.Additionally, medium enters pipe 20 and the upper orifice of the outer outlet pipe 21 of medium is opening of cutting sth. askew, effectively
Increased orifice area, decrease running resistance, and reduce the probability that the mouth of pipe is blocked.
As shown in Fig. 1, Fig. 3 and Fig. 6, electric heating core assembly 12 by temperature control inserting tube 5, take over a business 6, collector mat 10 and electric heating tube 11
Composition, take over a business the installing port of 6 closing housings 15, collector mat 10, electric heating tube 11, temperature control inserting tube 5 be installed in 6 same
Side, the space bottom that collector mat 10 is surrounded is connected with housing 15, and temperature control inserting tube 5, electric heating tube 11 are enclosed in collector mat 10 institute
In the space surrounding, the top of collector mat 10 is additionally provided with a balance port 9 to several connection collector mats 10.Outlet pipe
Pass through 6 to connect with housing 15 inside, the water inlet of outlet pipe is located at inner bag top(The i.e. top surface of collector mat 10).Outlet pipe
Water inlet be located at inner bag peak, can produce when user's heat water hydraulic pressure fall it is ensured that in courage savings temperature highest water
Can directly preferentially be drawn.
As shown in Fig. 1, Fig. 6 and Fig. 7, the length of heat exchange core assembly 16 cavity volume is longer than the length of collector mat 10, and thermal-arrest
It is arranged at intervals with extension bar, the core hat 14 of heat exchange core assembly 16 is by chuck in extending among bar on cover 10.Extend bar as heat exchange
Core stabilizer 13 fixes heat exchange core assembly 16, is prevented effectively from heat exchange core assembly 16 and damages in transportation.Additionally, heat exchange core is steady
Determine the netted ring structure that device 13 is also designed to as shown in Fig. 8 or Fig. 9, netted ring makes inside collector mat 10 at least provided with a row
The limbers connecting with inner bag, the shape of limbers can be square or oval etc..
As shown in Figures 2 and 3, housing 15 is equipped with screw-threaded coupling counterpart 8, electric heating in the installing port periphery of upper and lower ends
Core assembly 12, heat exchange core assembly 16 are separately mounted in corresponding installing port and by thread-locking ring 7 and screw-threaded coupling cooperation
Part 8 is fixing.Additionally, being respectively equipped with sealing gasket 18 between electric heating core assembly 12, heat exchange core assembly 16 and installing port.Thread-locking ring
It is additionally provided between 7 and screw-threaded coupling counterpart 8 and be inserted radially into both rivets 23.Due to heat exchange core assembly 16, electric heating core assembly
12 is all the standard assembly using high modularization, matching thread retaining ring 7 and screw-threaded coupling counterpart 8, sealing gasket 18, they
It is on the hookup wire in same axle center, in actual production, all can achieve an assembling action, just can effectively complete its lock
Tightening seal operation, the high assembling structure of this simplification, the production rapidly and efficiently beneficial to factory lines is installed, and is easy to after sale
The field maintenance of service.
The present embodiment is full of anti-icing fluid or coolant media in heat exchange core assembly 16, is full of and keeps connection in inner bag housing 15
Logical municipal tap water, in the state of electric heating tube 11 connects civil power, when work such as thermal source solar energy, heat pumps, can will change
Cold medium in hot core assembly 16 outlet pipe 21 from medium suctions out heating, then can enter the thermal medium after heating from medium again
The top of heat exchange core assembly 16 sent back to by pipe 20, and thermal medium is preced with 14 and housing 15 by the core shell wall 17 of hot core assembly 16 and core
Municipal tap water heat exchange, is cooled to cold medium, is then sucked out heating again, so circulates.When thermal source is nature at a slow speed
When circulating and no suppressing, the external threeway of lower nozzle of constant voltage overflow pipe 25, connect the Sheng liquid device of a tenesmus formula, its side under it
To direct and atmosphere.When thermal source is quick forced circulation or during with suppressing, its threeway is laterally through air bleeding valve
Indirectly and atmosphere.
When user uses hot water, hydraulic pressure fall in housing 15, can be produced, municipal tap water can enter housing 15 from water inlet pipe
Bottom, and hot water then can by collector mat 10 and outlet pipe export with water spot to user use.Basal temperature when hot water
Reach user demand setting value when, just directly use the cheap hot water that a thermal source such as solar energy, heat pump provides, and when basic
When hot water temperature does not reach the demand setting value of user, electric heating tube 11 is understood under the control of the temperature probe in temperature control inserting tube 5,
The heating that the basic hot water flowing through in collector mat 10 is carried out with dynamically benefit value on demand is made up the difference.
Claims (9)
1. the positive displacement heat-exchange inner container of a kind of electric auxiliary heating, including housing(15)With located at housing(15)Interior electric heating core assembly
(12), heat exchange core assembly(16), housing(15)It is provided with water inlet pipe, outlet pipe and be respectively mounted electric heating core assembly(12), heat exchange core
Assembly(16)Installing port, heat exchange core assembly(16)It is provided with cavity volume, medium enters pipe(20)The outer outlet pipe with medium(21), its feature
It is:
Described heat exchange core assembly(16), electric heating core assembly(12)It is coaxially disposed, heat exchange core assembly(16)Located at housing(15)Under
End, electric heating core assembly(12)Located at housing(15)Upper end, heat exchange core assembly(16)Axial length be more than electric heating core assembly
(12)Axial length,
Described electric heating core assembly(12)Mainly by collector mat(10)And electric heating tube(11)Composition, collector mat(10)With housing(15)
Connect and surround electric heating tube(11), the water inlet of outlet pipe is positioned at collector mat(10)Top surface, side or collector mat(10)Enclosed
In region,
Collector mat(10)It is provided with fixing heat exchange core assembly(16)Heat exchange core stabilizer(13), heat exchange core stabilizer(13)With thermal-arrest
Cover(10)It is integrally formed and is provided with stabilizer water inlet, stabilizer water inlet is higher than heat exchange core assembly(16), heat exchange core stabilizer
(13)For collector mat(10)The spaced extension in bottom bar, the interval between adjacent extension bar forms stabilizer water inlet, changes
Hot core assembly(16)By chuck among extension bar;Or heat exchange core stabilizer(13)For being arranged at collector mat(10)Bottom netted
Ring, the mesh of netted ring forms stabilizer water inlet, heat exchange core assembly(16)By chuck among netted ring.
2. electric auxiliary heating according to claim 1 positive displacement heat-exchange inner container it is characterised in that:Described collector mat(10)
Top be communicated with collector mat(10)Inside and outside balance port(9).
3. electric auxiliary heating according to claim 1 positive displacement heat-exchange inner container it is characterised in that:Described heat exchange core assembly
(16)Also it is preced with by core(14), core shell wall(17), constant voltage overflow pipe(25), chassis(19)With structural strengthening ring(22)Composition, cavity volume
It is preced with by core(14), core shell wall(17)And chassis(19)Surround, structural strengthening ring(22)Located at chassis(19)With core shell wall(17)'s
Binding site, constant voltage overflow pipe(25), medium enter pipe(20)The outer outlet pipe with medium(21)Respectively from chassis(19)Put in cavity volume
Interior, chassis(19)Closing installing port.
4. electric auxiliary heating according to claim 3 positive displacement heat-exchange inner container it is characterised in that:Described core shell wall(17)
For Non-smooth surface curved surface, core shell wall(17)It is provided with burr or the groove of axial direction, radial direction or spiral.
5. according to the electric auxiliary heating described in claim 1 positive displacement heat-exchange inner container it is characterised in that:Described housing(15)In peace
The periphery of dress mouth is provided with screw-threaded coupling counterpart(8), electric heating core assembly(12)Or heat exchange core assembly(16)It is arranged in installing port
And pass through thread-locking ring(7)With screw-threaded coupling counterpart(8)Fixing.
6. electric auxiliary heating according to claim 5 positive displacement heat-exchange inner container it is characterised in that:Described thread-locking ring
(7)With screw-threaded coupling counterpart(8)Between be provided with and be inserted radially into both rivets(23).
7. the electric auxiliary heating according to any one of claim 16 positive displacement heat-exchange inner container it is characterised in that:Described
Electric heating core assembly(12)Also by temperature control inserting tube(5)With take over a business(6)Composition, temperature control inserting tube(5)Inside it is provided with temperature probe, take over a business(6)
Closing installing port, collector mat(10), electric heating tube(11), temperature control inserting tube(5)It is installed in(6)The same side, and thermal-arrest
Cover(10)Surround temperature control inserting tube(5).
8. electric auxiliary heating according to claim 7 positive displacement heat-exchange inner container it is characterised in that:Described outlet pipe passes through
Take over a business(6)With housing(15)Internal connection.
9. the electric auxiliary heating according to any one of claim 16 positive displacement heat-exchange inner container it is characterised in that:
Described water inlet pipe is by extension water inlet pipe(1), housing water inlet pipe(2), interior note pipe(24)It is formed by connecting, housing water inlet pipe(2)
Located at housing(15)On, interior note pipe(24)It is arranged on housing(15)Interior, interior note pipe(24)Upper orifice and housing water inlet pipe(2)Water
Connect, interior note pipe(24)Lower nozzle and housing(15)Bottom connection is near, extension water inlet pipe(1)Positioned at housing(15)Outward, extension is entered
Water pipe(1)Upper orifice and housing water inlet pipe(2)Water connects, extension water inlet pipe(1)Lower nozzle be connected with running water pipe water;
Described outlet pipe is by extension outlet pipe(3), housing outlet pipe(4)It is formed by connecting, housing outlet pipe(4)Located at housing(15)
On, extension outlet pipe(3)Positioned at housing(15)Outward, extension outlet pipe(3)Upper orifice and housing outlet pipe(4)Water connects, outward
Extend water pipe(3)Pipe shaft around to housing(15)Outer lower end, extension outlet pipe(3)Lower nozzle be connected with water spot water;
Described extension water inlet pipe(1), extension outlet pipe(3)It is non-metallic material and effective length is more than itself radius squared
More than 53 times.
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CN201410561101.6A CN104315702B (en) | 2014-10-21 | 2014-10-21 | Positive-displacement heat exchange liner with function of electrically assisted heating |
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CN104315702B true CN104315702B (en) | 2017-02-22 |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106440374A (en) * | 2016-10-31 | 2017-02-22 | 济南丰源塑料有限公司 | Dual-flange inner container with plastic heat exchanger for water heater |
CN108775712A (en) * | 2018-08-07 | 2018-11-09 | 安徽品冠新能源设备有限公司 | A kind of case tube heat exchanger with auxiliary electrical heating function |
CN110553391A (en) * | 2019-07-26 | 2019-12-10 | 史玉芳 | Energy-saving heating furnace |
CN112178943A (en) * | 2020-09-18 | 2021-01-05 | 华帝股份有限公司 | Anti-freezing control method and water heater using same |
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CN2703228Y (en) * | 2004-05-17 | 2005-06-01 | 扬州市华扬新能源有限公司 | Air source hot pump water heater |
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