CN1757984A - Power frequency resonance type induction electric boiler - Google Patents
Power frequency resonance type induction electric boiler Download PDFInfo
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- CN1757984A CN1757984A CN 200410080440 CN200410080440A CN1757984A CN 1757984 A CN1757984 A CN 1757984A CN 200410080440 CN200410080440 CN 200410080440 CN 200410080440 A CN200410080440 A CN 200410080440A CN 1757984 A CN1757984 A CN 1757984A
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- heating pipe
- induction heating
- power frequency
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Abstract
A main-frequency resonance type electric induction boiler is composed of the induction heater consisting of vertically arranged multiple induction heating tubes, a capacitor, an upper boiler cylinder or upper water collecting tank above said induction heating tubes, and a lower water collecting tank under said induction heating tubers. Said induction heating tube comprises a water tube, an internal heating steel tube and an external electromagnetic induction coil. When said induction heating tube is electrically and parallelly connected with said capacitor, a parallel resonance takes place to save electric energy by 50%.
Description
Technical field
The technical field that the present invention relates to has eddy-current heating and antiresonant circuit, particularly relates to a kind of power frequency resonance type induction electric boiler.
Background technology
In existing electric boiler, employing be the heater that the resistance-type electrothermal tube constitutes.Because resistance type heater in heating process, converts heat to behind the energy of electrical network absorption 100%, water or other liquid medium are heated.So the power consumption of this electric boiler is higher, in application, be subjected to certain restriction.The CN2440180Y patent of China Intellectual Property Office's bulletin in 25 days July calendar year 2001: in electric hot water and the pot-type boiler induction type heating energy-saving device, disclose a kind of electric boiler that utilizes antiresonant circuit water to be carried out eddy-current heating.This patent is to heating around the induction winding in a water receptacle barrel outside and the resonance circuit power supply of capacitor parallel connection with pressure regulator.Its heater is this water receptacle barrel and stows the thick walled steel tube or the steel ball of portion within it.The weak point of this patent is: as the heat in the water receptacle barrel outside of heating main body, can not with the water contact heat-exchanging, thermal loss is bigger; And the thick walled steel tube or the steel ball that stow in water receptacle barrel the inside have magnetic screening action to cause caloric value lower because of this water receptacle barrel to it; The active loss of inductance in antiresonant circuit that is made of induction winding and water receptacle tube is bigger, and is difficult to reach optimum resonant state after capacitor is in parallel; Is to have increased an energy consumption equipment and manufacturing cost newly by pressure regulator to the shortcoming of antiresonant circuit power supply; The electric boiler that this patent is made is a single-phase large power-consuming equipment, can cause imbalance of three-phase voltage to electrical network.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of and power to antiresonant circuit without pressure regulator; The a plurality of independently antiresonant circuits power supplies that directly under power frequency supply, constitute by electrical control gear by electrical network to induction heating pipe and capacitor; And the heating main body in this induction heating pipe is not by magnetic screen and all be dipped in the water and the water contact heat-exchanging; The active loss of this induction heating pipe in antiresonant circuit is less, and can under power frequency supply parallel resonance take place after capacitor is in parallel, and reaches optimum resonant state; Can be to three phase mains with the electrical power mean allocation of a plurality of independently antiresonant circuits, do not influence electrical network imbalance of three-phase voltage degree, power frequency resonance type induction electric boiler.
The technical problem to be solved in the present invention is achieved through the following technical solutions:
A kind of power frequency resonance type induction electric boiler, it comprises electrical control gear, capacitor, antiresonant circuit, heat-insulation layer; It is characterized in that: it also includes the induction heating pipe of a plurality of vertical arrangements, and the hot water exit above described induction heating pipe is connected with upper drum or upper condensate sump, and the cooling water inlet place below described induction heating pipe is connected with lower condensate sump; Described antiresonant circuit is by induction heating pipe and a plurality of independently antiresonant circuits that constitute after capacitor and power frequency AC are in parallel;
Described induction heating pipe comprises, the inside at an electromagnetic induction coil, a ventilating water pipe of being made by non-magnet material is arranged, the inside at described ventilating water pipe, one or more separate and parallel heating pipe made from permeability magnetic material is arranged, leave the gap between the internal diameter of described ventilating water pipe and the external diameter of described heating pipe, also leave the gap between the external diameter of described many heating pipes.
Ventilating water pipe in the described induction heating pipe is to make with magnetism-free stainless steel or epoxy glass laminate.Heating pipe in the described induction heating pipe is to make with low carbon steel pipe or silicon steel pipe.Respectively there is a flange two of ventilating water pipe ends in the described induction heating pipe.Respectively there is a reducing concentric reducer two of ventilating water pipe ends in the described induction heating pipe.Respectively there is a porous shrouding two of ventilating water pipe ends in the described induction heating pipe.When ventilating water pipe is made with magnetism-free stainless steel in the described induction heating pipe, be welded with one or two porous fixed head in the middle with the described heating pipe that is placed in the inside.Between described a plurality of induction heating pipe magnetic shielding cover is arranged.Between the middle part of described upper drum and the middle part of described lower condensate sump down-comer and circulating pump can also be arranged.
Beneficial effect after power frequency resonance type induction electric boiler of the present invention and the CN2440180Y contrast is as follows:
(1) do not have additional pressure regulator, directly power to antiresonant circuit, saved the added losses that pressure regulator brings and reduced manufacturing cost by power supply.
(2) induction heater that is made of a plurality of induction heating pipes has the flexibility of multiple power combination, and it can be given total electrical power mean allocation on the three phase supply power supply by mode in parallel, does not influence the degree of balance of line voltage.
(3) ventilating water pipe in the described induction heating pipe adopts no magnetic material to make, to being placed in making heating pipe by permeability magnetic material and not constituting magnetic screen of described ventilating water pipe the inside, so induction heating pipe almost all is used in the heating of described heating pipe from the energy that power supply absorbs.Because described heating pipe is under water and the water contact heat-exchanging, its heat exchange area is its internal surface area and external surface area sum, and the actual heat exchange area with water of described CN2440180Y patent mainly is the internal surface area of water capacity barrel.So, absorbing under the identical power, the heat exchange area of heating pipe of the present invention and water is CN2440180Y patent and water heat exchange area 1.5 to 2 times.So the thermal efficiency of power frequency resonance type induction electric boiler of the present invention is more than 98%.
(4) volume of described induction heating pipe and electrical power are all less, and the active loss in antiresonant circuit is also smaller, so, by induction heating pipe with after capacitor is in parallel under power-frequency voltage, parallel resonance can take place and can reach optimum resonant state.The power that the described induction heating pipe that moves under optimum resonant state discharges is greater than from the power supply power absorbed.Thereby saved about 50% electric power energy.
The experimental result that parallel resonance takes place under power-frequency voltage for described induction heating pipe and capacitor is as follows:
The induction heating pipe parameter:
(1) electromagnetic induction coil: inner/outer diameter=115/135mm, highly=500mm,
Enamel insulated round copper wire diameter=2.44mm, the number of turns=350 circles.
(2) ventilating water pipe: material is an epoxy glass laminate, inner/outer diameter=90/100mm.
(3) heating pipe: four of carbon steel tubings, inner/outer diameter=26/32mm, length 500mm.
Capacitor parameters: capacitance=313 μ f.
Anhydrous state following conduction time: 2 minutes.Room temperature: 25.5 ℃.
After connecting into parallel circuit by the induction heating pipe of above-mentioned parameter configuration and capacitor on electric, on the also interface of this circuit, apply a frequency and be 50Hz, single-phase, 220 volts alternating voltage.At this moment, this parallel connection alternating current circuit generation parallel resonance.The data that measure respectively with ammeter and voltage meter are as follows: the power input electric current is that 11.6 amperes, voltage are 220 volts, and the electromagnetic induction coil of induction heating pipe and the electric current on the capacitor are that 24 amperes, voltage are 220 volts.This shows that the power that induction heating pipe discharges is greater than from the power supply power absorbed, saves energy 51.66%.
Description of drawings
Fig. 1 is the main pseudosection of induction heating pipe first embodiment in the power frequency resonance type induction electric boiler of the present invention;
Fig. 2 is that induction heating pipe in the power frequency resonance type induction electric boiler shown in Figure 1 is along the amplification profile of B-B line;
Fig. 3 is the main pseudosection of another embodiment of induction heating pipe in the power frequency resonance type induction electric boiler of the present invention;
Fig. 4 is that induction heating pipe in the power frequency resonance type induction electric boiler shown in Figure 3 is along the amplification profile of B-B line;
Fig. 5 is the general front view of first, second embodiment of power frequency resonance type induction electric boiler of the present invention;
Fig. 6 is the left view of power frequency resonance type induction electric boiler first embodiment shown in Figure 5;
Fig. 7 is the left view of power frequency resonance type induction electric boiler second embodiment shown in Figure 5;
Fig. 8 is the front view of power frequency resonance type induction electric boiler the 3rd embodiment of the present invention;
Fig. 9 is the left view of power frequency resonance type induction electric boiler the 3rd embodiment shown in Figure 8;
Figure 10 is the electrical schematic diagram of antiresonant circuit first embodiment independently described in the power frequency resonance type induction electric boiler of the present invention;
Figure 11 is the electrical schematic diagram of antiresonant circuit second embodiment independently described in the power frequency resonance type induction electric boiler of the present invention;
Figure 12 is the electrical schematic diagram of antiresonant circuit the 3rd embodiment independently described in the power frequency resonance type induction electric boiler of the present invention;
Figure 13 is that antiresonant circuit described in the power frequency resonance type induction electric boiler of the present invention is the electrical schematic diagram of a kind of embodiment of a plurality of independently antiresonant circuits.
Among the figure: 1, external tapping flange 26, electric contact thermometer
2, reducing concentric reducer 27, safety valve
3, connecting bolt 28, hot water/steam (vapor) outlet
4, inner joint flange 29, upper drum
5, sealing ring; 30,30a, 30b, 30c, 30d, 30e,
6, the porous shrouding induction heating pipe that has flange
31, support
7, magnetism-free stainless steel ventilating water pipe 32, adpting flange
8, heating pipe 33, magnetic shielding cover
9, heat-insulation layer 34, installing rack
10, electromagnetic induction coil 35, cooling water inlet
11, finish lead 36, lower condensate sump
12, insulation casting die 37, sewage draining exit
13, press nail 38, base
14, support plate 39, lower condensate sump support
15, installing plate 40,40a, 40b, 40c, 40d, 40e
, capacitor
16, bolt 41, connection cable
17, porous shrouding 42, ac power output row
18, epoxy glass laminate ventilating water pipe 50, down-comer
19, porous fixed head 51, circulating pump
21, electrical control gear 55, upper condensate sump
22, ac power input end row 56, distributing pipe line
23, shell body 58, insulation layer
24, discharge line valve 65,65a, temperature sensor
25, electro connecting pressure gauge
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and embodiments.
The induction heating pipe 30 that constitutes by a heating pipe 8 illustrated in figures 1 and 2.The described heating pipe 8 parallel the insides that are placed on magnetism-free stainless steel ventilating water pipe 7.Be useful on the gap of circulation water between the internal diameter of the external diameter of heating pipe 8 and magnetism-free stainless steel ventilating water pipe 7.On the described porous shrouding 6 that has a flange, the water flowing gap location between heating pipe 8 and magnetism-free stainless steel ventilating water pipe 7 has a plurality of limbers.Porous fixed head 19 is welded on the middle part of heating pipe 8 earlier, is welded on the middle part of magnetism-free stainless steel ventilating water pipe 7 again.Be welded into one after the corresponding perforation in hole on the body pipeline of described heating pipe 8 and the porous shrouding 6 that has flange, integrally welded with magnetism-free stainless steel ventilating water pipe 7 again in its end.The end that reducing concentric reducer 2 diameters are little is welded with external tapping flange 1, and the end that reducing concentric reducer 2 diameters are big is welded on the porous shrouding 6 that has flange.At the outer surface of magnetism-free stainless steel ventilating water pipe 7, be coated with heat-insulation layer 9.Electromagnetic induction coil 10 is sleeved on the outside of insulation 9, uses insulation casting die 12, support plate 14, presses nail 13 fixing.Installing plate 15 is screwed onto on the connecting bolt 3.But have on the porous shrouding 6 of flange flange hole also the double as installing hole use.
Fig. 3 and the described induction heating pipe 30 that constitutes by four heating pipes 8 shown in Figure 4.Heating pipe 8 is separate and parallel, welds together after the body pipeline of this heating pipe 8 and the corresponding perforation in the hole on the porous shrouding 17.Leave the gap between four heating pipes 8.After heating pipe 8 and porous shrouding 17 are integrally welded, parallelly place the inside of epoxy glass laminate ventilating water pipe 18 and leave the water flowing gap.Two ends of epoxy glass laminate ventilating water pipe 18 have fixed-type body flange respectively, are coated with heat-insulation layer 9 at its outer surface.Electromagnetic induction coil 10 is sleeved on the outside of heat-insulation layer 9, fixes with insulation casting die 12, support plate 14, pressure nail 13.The porous shrouding 6 that has flange places the centre of epoxy glass laminate ventilating water pipe 18 and inner joint flange 4, at the flange place on its two sides sealing ring 5 is housed, and is fixing with bolt 16 then, links together with connecting bolt 3 again.External tapping flange 1 is integrally welded in advance with reducing concentric reducer 2 and inner joint flange 4.Installing plate 15 is screwed onto on the connecting bolt 3.
Fig. 5 and shown in Figure 6 be the front view and the left view of power frequency resonance type induction electric boiler first embodiment.The main application of this embodiment is the Induction Heating homogeneous solution-type reactor that external heat exchanger formula heating system is used.Capacitor 40-40e among Fig. 5 be mounted in electrical control gear below, when needing the capacitor of a greater number, capacitor 40 also can be arranged separately in the capacitor panel.Cooling water inlet 35 is input to the backwater in the outside heating pipe-line system in the lower condensate sump 36, flows in the upper drum 29 through induction heating pipe 30-30e, by hot water outlet 28 hot water is transferred in the outside heating pipe-line system.Induction heating pipe 30-30e is communicated with distributing pipe line 56 usefulness adpting flanges 32 by external tapping flange 1.After the finish lead of induction heating pipe 30-30e 11 is connected in parallel respectively with capacitor 40-40e, arranges 42 contact by ac power output in stube cable 41 and the electrical control gear 21 and be connected in parallel into 6 independently antiresonant circuits.Water in induction heating pipe 30-30e is under the state of circulation by electrical control gear 21 energising heating.When no longer needing to continue heating after the water temperature in the heating system reaches requirement, the power supply that should cut off induction heating pipe earlier stops the circulation of water again.In order to guarantee the safe operation of power frequency resonance type induction electric boiler of the present invention, safety valve 27, discharge line valve 24, electric contact thermometer 26 and electro connecting pressure gauge 25 are arranged at the top of upper drum.Magnetic shielding cover 33 between the induction heating pipe 30-30e will reduce the mutual leakage field influence of induction heating pipe.For the ease of maintenance, induction heating pipe 30-30e is connected with lower condensate sump 36 with upper drum 29 by adpting flange 32.Upper drum 29, induction heating pipe 30-30e and lower condensate sump 36 all are to be fixed on the base 38 by support 31, installing rack 34 and lower condensate sump support 39.Sewage draining exit 37 is a usefulness of removing dirt.Shell body 23 is defensive.At the insulation layer 58 shown in Fig. 5 be incumbent on drum, lower condensate sump and distributing pipe line 56 outer surfaces.At the temperature sensor shown in Fig. 6 65,65a mainly is the water inlet and the delivery port temperature of monitoring induction heating pipe.
Fig. 5 and shown in Figure 7 be the front view and the left view of power frequency resonance type induction electric boiler second embodiment.This embodiment main application is the induced electricity steam boiler.The function and structure among Fig. 5 and Fig. 7 in possessing first embodiment, also have a down-comer 50 and circulating pump 51.The top of down-comer 50 is communicated with the middle part of upper drum 29, and the bottom of down-comer 50 is communicated with the water inlet of circulating pump 51, and the delivery port of circulating pump 51 is communicated with the middle part of lower condensate sump 36, constitutes a closed circuit hot water cyclesystem.Steam (vapor) outlet 28 is arranged at the top of upper drum 29.Upper drum 29 shown in Fig. 5, Fig. 6, Fig. 7 can be with reference to upper drum manufacturing coal-fired, oil burning boiler.
Fig. 8 and shown in Figure 9 be the front view and the left view of power frequency resonance type induction electric boiler the 3rd embodiment.This embodiment main application is Induction Heating homogeneous solution-type reactor that direct heating formula heating system is used or Induction Heating Oil Guide boiler.The function and structure among Fig. 8 and Fig. 9 in possessing first embodiment, mainly be to substitute upper drum 29 with upper condensate sump 55.Because the pipeline connection of heating system in the pipeline of direct heating mode heating system and the power frequency resonance type induction electric boiler of the present invention, enough moisture storage capacity circulations are arranged, so can not only guarantee function of use with upper condensate sump 55, and dwindle the volume of power frequency resonance type induction electric boiler of the present invention.
Shown in Figure 10 is by an induction heating pipe 30 middle connecting terminal 30-1,30-2 with after binding post 40-1,40-2 in the capacitor 40 are in parallel respectively again with electrical control gear 21 in ac power output row 42 contact 21A11,21N11 be connected in parallel.By above-mentioned connection, constituted described independently antiresonant circuit first embodiment.21A, 21N are two contacts of electrical control gear 21 ac power input ends row.Electrical schematic diagram shown in Figure 10 is to constitute the most basic main circuit diagram of power frequency resonance type induction electric boiler of the present invention; AC power in this circuit～frequency be power frequency, i.e. 50 He Zhi or 60 He Zhi, the voltage that exchanges input is 220 volts/380 volts or 240 volts/415 volts.The operation principle of this circuit is, the inductance parameters in the induction heating pipe 30 is to design definitely in advance, and the parameter of capacitor 40 is mated by described inductance parameters.Inductance and the coupling of electric capacity must satisfy the condition of resonance of alternating current circuit in parallel, i.e. capacitive reactance in induction reactance in the induction heating pipe and the capacitor equates during for power frequency in frequency.After a power-frequency voltage imposes on described independently antiresonant circuit, this circuit generation parallel resonance, the electric current that flows through in the electromagnetic induction coil 10 in the circuit is greater than the electric current of AC power supply at this moment.The power that the induction heating pipe 30 that moves under this resonant condition sends is greater than from the electrical network power absorbed, thereby reaches the purpose of energy savings.
The binding post 30d-2 that shown in Figure 11 is among the induction heating pipe 30d is with after the binding post 30e-1 among the induction heating pipe 30e connects, again by binding post 30d-1,30e-2 among induction heating pipe 30d, the 30e respectively with capacitor 40d in binding post 40d-1,40d-2 be connected in parallel, and then be connected in parallel with ac power output row 42 contact 21C11,21N12 in the electrical control gear 21.By above-mentioned connection, constituted second embodiment of described independently antiresonant circuit.21C, 21N are two contacts of ac power input end row 22 in the electrical control gear 21.
After the binding post 30d-1 that shown in Figure 12 is among induction heating pipe 30d, the 30e and 30e-1,30d-2 and 30e-2 are connected in parallel, again with capacitor 40d in binding post 40d-1,40d-2 and electrical control gear 21 in ac power output row 42 contact 21C11,21N12 be connected in parallel respectively.By above-mentioned connection, constituted the 3rd embodiment of described independently antiresonant circuit.21C, 21N are two contacts of ac power input end row 22 in the electrical control gear 21.
After binding post 30a-1, the 30a-2 that shown in Figure 13 is among the induction heating pipe 30a and binding post 40a-1,40a-2 among the capacitor 40a are connected in parallel respectively again with electrical control gear 21 in ac power output row 42 contact 21A1,21N1 be connected in parallel; After binding post 30b-1,30b-2 among the induction heating pipe 30b and binding post 40b-1,40b-2 among the capacitor 40b are connected in parallel respectively again with electrical control gear 21 in ac power output row 42 contact 21B1,21N1 be connected in parallel; After binding post 30c-1,30c-2 among the induction heating pipe 30c and binding post 40c-1,40c-2 among the capacitor 40c are connected in parallel respectively again with electrical control gear 21 in ac output end row 42 21C1,21N1 be connected in parallel.By above-mentioned connection, having constituted described antiresonant circuit is a kind of embodiment of a plurality of independently antiresonant circuits.21A, 21B, 21C, 21N are four contacts of ac power input end row 22 in the electrical control gear 21 among the figure.Can be in parallel a plurality of on ac power output row 42 contact 21A1,21B1,21C1, the 21N1 in electrical control gear 21 by induction heating pipe 30 and capacitor 40 described independently antiresonant circuit in parallel.Like this, just with a powerful power load mean allocation in the three-phase power supply system of electrical network, thereby guaranteed the three-phase equilibrium degree of line voltage.The circuit structure of electrical control gear 21 and element constitute to be made by knowing the electric boiler electric-control system know-why of knowing.
Claims (9)
1, a kind of power frequency resonance type induction electric boiler, it comprises electrical control gear, capacitor, antiresonant circuit, heat-insulation layer; It is characterized in that: it also includes the induction heating pipe of a plurality of vertical arrangements, and the hot water exit above described induction heating pipe is connected with upper drum or upper condensate sump, and the cooling water inlet place below described induction heating pipe is connected with lower condensate sump; Described antiresonant circuit is by induction heating pipe and a plurality of independently antiresonant circuits that constitute after capacitor and power frequency AC are in parallel;
Described induction heating pipe comprises, the inside at an electromagnetic induction coil, a ventilating water pipe of being made by non-magnet material is arranged, the inside at described ventilating water pipe, one or more separate and parallel heating pipe made from permeability magnetic material is arranged, leave the gap between the internal diameter of described ventilating water pipe and the external diameter of described heating pipe, also leave the gap between the external diameter of described many heating pipes.
2, power frequency resonance type induction electric boiler according to claim 1 is characterized in that: the ventilating water pipe in the described induction heating pipe is to make with magnetism-free stainless steel or epoxy glass laminate.
3, power frequency resonance type induction electric boiler according to claim 1 is characterized in that: the heating pipe in the described induction heating pipe is to make with low carbon steel pipe or silicon steel pipe.
4, power frequency resonance type induction electric boiler according to claim 1 is characterized in that: respectively there is a flange two of ventilating water pipe ends in the described induction heating pipe.
5, power frequency resonance type induction electric boiler according to claim 1 is characterized in that: respectively there is a reducing concentric reducer two of ventilating water pipe ends in the described induction heating pipe.
6, power frequency resonance type induction electric boiler according to claim 1 is characterized in that: respectively there is a porous shrouding two of ventilating water pipe ends in the described induction heating pipe.
7, power frequency resonance type induction electric boiler according to claim 1, it is characterized in that: when ventilating water pipe is made with magnetism-free stainless steel in the described induction heating pipe, be welded with one or two porous fixed head in the middle with the described heating pipe that is placed in the inside.
8, power frequency resonance type induction electric boiler according to claim 1 is characterized in that: between described a plurality of induction heating pipes magnetic shielding cover is arranged.
9, power frequency resonance type induction electric boiler according to claim 1 is characterized in that: between the middle part of described upper drum and the middle part of described lower condensate sump down-comer and circulating pump can also be arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410080440 CN1757984A (en) | 2004-10-10 | 2004-10-10 | Power frequency resonance type induction electric boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410080440 CN1757984A (en) | 2004-10-10 | 2004-10-10 | Power frequency resonance type induction electric boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1757984A true CN1757984A (en) | 2006-04-12 |
Family
ID=36703482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410080440 Pending CN1757984A (en) | 2004-10-10 | 2004-10-10 | Power frequency resonance type induction electric boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230669A (en) * | 2011-06-27 | 2011-11-02 | 张发和 | Electric heating boiler for heating water |
| CN102401420A (en) * | 2011-11-16 | 2012-04-04 | 宁波高新区安立特电气科技有限公司 | Variable-frequency electromagnetic heating device |
| CN102537919A (en) * | 2012-02-28 | 2012-07-04 | 佛冈县新能达节能环保有限公司 | Steam boiler |
| CN108679591A (en) * | 2018-05-24 | 2018-10-19 | 四川新城都锅炉有限公司 | Efficiently, environmental-protecting electromagnetic boiler |
| CN110864352A (en) * | 2019-11-29 | 2020-03-06 | 辽宁力泰中节能科技有限公司 | Energy converter auxiliary fixing device for electromagnetic heat pump |
-
2004
- 2004-10-10 CN CN 200410080440 patent/CN1757984A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230669A (en) * | 2011-06-27 | 2011-11-02 | 张发和 | Electric heating boiler for heating water |
| CN102401420A (en) * | 2011-11-16 | 2012-04-04 | 宁波高新区安立特电气科技有限公司 | Variable-frequency electromagnetic heating device |
| CN102537919A (en) * | 2012-02-28 | 2012-07-04 | 佛冈县新能达节能环保有限公司 | Steam boiler |
| CN108679591A (en) * | 2018-05-24 | 2018-10-19 | 四川新城都锅炉有限公司 | Efficiently, environmental-protecting electromagnetic boiler |
| CN110864352A (en) * | 2019-11-29 | 2020-03-06 | 辽宁力泰中节能科技有限公司 | Energy converter auxiliary fixing device for electromagnetic heat pump |
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