CN206556243U - A kind of staggered form multi cycle pipe type heating device and apply its hot-water boiler - Google Patents
A kind of staggered form multi cycle pipe type heating device and apply its hot-water boiler Download PDFInfo
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- CN206556243U CN206556243U CN201720269099.4U CN201720269099U CN206556243U CN 206556243 U CN206556243 U CN 206556243U CN 201720269099 U CN201720269099 U CN 201720269099U CN 206556243 U CN206556243 U CN 206556243U
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Abstract
The utility model discloses a kind of staggered form multi cycle pipe type heating device and using its hot-water boiler, belong to hot-water boiler technical field.Pipe type heating device of the present utility model, including flue, horizontal water tube and vertical water pipe, horizontal water tube and vertical water pipe are located in flue reciprocally bendingly, and horizontal water tube and vertical water pipe are alternately provided with multilayer in flue, the horizontal water tube of adjacent two layers is interlaced, and connect be open into circulation water route, transverse direction circulation water route corresponds to external water inlet pipe and outlet pipe respectively by horizontal water inlet pipe and horizontal outlet pipe, the vertical water pipe of adjacent two layers is interlaced, and mutually it is connected into longitudinal direction circulation water route, longitudinal direction circulation water route corresponds to external water inlet pipe and outlet pipe respectively by longitudinal water inlet pipe and longitudinal outlet pipe.The utility model greatly extends stroke of the heat energy in pipe type heating device, and the utilization rate of heat energy greatly improved, and energy-conserving and environment-protective, heating is quick；Meanwhile, using the hot-water boiler of the pipe type heating device, install and safeguard simple and convenient.
Description
Technical field
The utility model is related to a kind of hot-water boiler, heats and fills more specifically to a kind of staggered form multi cycle tubular type
Put and using its hot-water boiler.
Background technology
At present, the hot water supply in the place such as many hotels, community, bathroom also relies on Hot water car and transported from boiler factory, hot water
Use cost is higher, and is inconvenient, and these places can not install large-sized boiler to provide hot water.For this problem,
Many small atmospheric hot-water boilers are also occurred in that on the market, this boiler belongs to domestic life boiler category, be mainly used in heating
With production hot water, be also one of our relatively common boiler kinds, according to fuel difference can be divided into electrothermal atmospheric boiler, often
Press gas-fired water heating boiler, normal pressure oil-fired water-boiler and normal-pressure fire coal hot-water boiler.Electric hot water production hot water cost compared with
Height, generally requires larger water tank storage hot water, it is difficult to accomplish directly-heated type water outlet, it is necessary to which frequent starting is heated, waste is a large amount of
Electric energy；Although coal-fired hot-water boiler hot water production cost is relatively low, because fire coal has larger pollution to environment, for environmental protection
Consider, coal-fired hot-water boiler is eliminated substantially.Combustion gas and fuel oil are as the energy more cleaned, and cost is relatively low, therefore
Gas-fired water heating boiler and oil-fired water-boiler have obtained preferable development.
However, existing tube type water heating boiler uses Chinese Patent Application No. 201510256712.4, innovation and creation mostly
It is entitled：The heat of coiled structure in coiled hot water, steam boiler, combustion gas and fuel oil burning is most of in the middle part of coil pipe
Passage pass through and from chimney discharge, capacity usage ratio is relatively low, and the wasting of resources is more serious.Through retrieval, China Patent No.
ZL99213913.9, authorized announcement date is on July 19th, 2000, and utility model is entitled：Multi-functional energy-saving smoke is vertical
Normal-pressure boiler, this application case uses tubular type heating arrangement, and it is mainly characterized by setting multiple rows of staggered form to be heated horizontal water in furnace chamber
Pipe, the heated horizontal water tube of these staggered forms is directly heated using burner.This application case is prolonged using the heated horizontal water tube of multiple rows of staggered form
The stroke of calory burning has been grown, the heat-exchange time of calory burning and heated horizontal water tube is added, solved to a certain extent existing
With the presence of coal-fired, gas fired-boiler heat utilization efficiency it is low the problem of, but rely solely on multiple rows of horizontal water tube, calory burning still can be quick
It is lost in between multiple rows of horizontal water tube, it is impossible to further lift the heat utilization rate of boiler.
The content of the invention
1. the utility model technical problem to be solved
The purpose of this utility model is to overcome the shortcomings of that existing hot-water boiler has that heat utilization rate is low to be handed over there is provided one kind
V shape multi cycle pipe type heating device and apply its hot-water boiler, using the technical solution of the utility model, using intersecting and
The horizontal water tube and vertical water pipe being staggered greatly extend stroke of the combustion heat energy in pipe type heating device, add burning
The heat-exchange time of heat energy and water pipe, greatly improved the utilization rate of heat energy, and energy-conserving and environment-protective, heating is quick；Meanwhile, using the tubular type
The hot-water boiler of heater, installs and safeguards simple and convenient.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the utility model is provided is：
A kind of staggered form multi cycle pipe type heating device of the present utility model, including flue, horizontal water tube and and horizontal water tube
Vertical water pipe arranged in a crossed manner, described horizontal water tube and vertical water pipe are located in flue reciprocally bendingly, and horizontal water tube and vertical water
Pipe is alternately provided with multilayer in flue, and the horizontal water tube of adjacent two layers is interlaced, and first successively from lower to upper in flue
Tail, which connects, is open into circulation water route, and transverse direction circulation water route corresponds to external water inlet respectively by horizontal water inlet pipe and horizontal outlet pipe
Pipe and outlet pipe, the vertical water pipe of adjacent two layers are interlaced and end to end into longitudinal circulation successively from lower to upper in flue
Water route, longitudinal direction circulation water route corresponds to external water inlet pipe and outlet pipe respectively by longitudinal water inlet pipe and longitudinal outlet pipe.
Further, the shape of cross section of described flue is rectangle, described horizontal water tube and vertical water pipe square crossing.
Further, described horizontal circulation water route and longitudinal direction circulation water route is using bottom in and top out or upper entering and lower leaving
Pass in and out water-bound.
Further, every layer of adjacent two piece horizontal water tube is using the connection of semi arch tube transitions, every layer of adjacent two piece
Vertical water pipe is also using the connection of semi arch tube transitions.
Further, the top of described flue is additionally provided with smoke exhaust pipe.
In a kind of staggered form multi cycle tube type water heating boiler of the present utility model, including body of heater, the body of heater of described body of heater
Above-mentioned pipe type heating device is provided with courage.
Further, the body of heater inner bag periphery of described body of heater is additionally provided with incubation cavity.
Further, described incubation cavity uses ability of swimming insulation construction, and described incubation cavity is by protecting warm water intake pipe
Respectively correspondingly it is connected with water outlet pipe is protected with water inlet pipe and outlet pipe.
Further, the spool for route arrangement is also equipped with described incubation cavity.
Further, the bottom of described body of heater is heated using combustion gas or oil burner.
3. beneficial effect
The technical scheme provided using the utility model, compared with existing known technology, is had the advantages that：
(1) a kind of staggered form multi cycle pipe type heating device of the present utility model, its horizontal water tube and vertical water pipe are reciprocal curved
It is located in flue folding, and horizontal water tube and vertical water pipe are alternately provided with multilayer, the horizontal water tube phase of adjacent two layers in flue
Mutually staggeredly, it is end to end successively from lower to upper and in flue to be open into circulation water route, transverse direction circulate water route by it is horizontal enter
Water pipe and horizontal outlet pipe correspond to external water inlet pipe and outlet pipe respectively, and the vertical water pipe of adjacent two layers is interlaced, and in flue
Inside end to end into longitudinal direction circulation water route successively from lower to upper, this longitudinally passes through longitudinal water inlet pipe and longitudinal outlet pipe in circulation water route
External water inlet pipe and outlet pipe are corresponded to respectively, and burning is greatly extended using the horizontal water tube and vertical water pipe that intersect and be staggered
Stroke of the heat energy in pipe type heating device, adds the heat-exchange time of combustion heat energy and water pipe, and the profit of heat energy greatly improved
With rate, compared with conventional boiler structure, energy-conservation 50% or so, energy-conserving and environment-protective, heating is quick, instant-heating；
(2) a kind of staggered form multi cycle pipe type heating device of the present utility model, the shape of cross section of its flue is rectangle,
Horizontal water tube and vertical water pipe square crossing, it is simple in construction, it is easy to make；
(3) a kind of staggered form multi cycle pipe type heating device of the present utility model, laterally circulation water route and longitudinal direction are circulated for it
Water route is using the turnover water-bound of bottom in and top out or upper entering and lower leaving, and water route is connected and do not limited strictly during installation, installs simple
It is convenient；
(4) a kind of staggered form multi cycle pipe type heating device of the present utility model, its every layer adjacent two piece horizontal water tube is equal
Connected using semi arch tube transitions, every layer of vertical water pipe of adjacent two piece is also using the connection of semi arch tube transitions, and current flowing is suitable
Freely, it is safe and reliable using stable；
(5) a kind of staggered form multi cycle tube type water heating boiler of the present utility model, it is set in the body of heater inner bag of body of heater
Above-mentioned pipe type heating device, installation of the pipe type heating device in body of heater inner bag is simple and convenient, easy to disassemble to safeguard；
(6) a kind of staggered form multi cycle tube type water heating boiler of the present utility model, the body of heater inner bag periphery of its body of heater is also set
There is incubation cavity, incubation cavity uses ability of swimming insulation construction, and incubation cavity is corresponded to respectively by protecting warm water intake pipe and protecting water outlet pipe
Ground is connected with water inlet pipe and outlet pipe, more fully using the waste heat production hot water of heat energy, and the hot water of production directly converges
Enter delivery port to use, further increase energy utilization rate；
(7) a kind of staggered form multi cycle tube type water heating boiler of the present utility model, the bottom of its body of heater uses combustion gas or combustion
Oil burner is heated, and instead of coal-fired hot-water boiler, energy consumption is low, the feature of environmental protection is good.
Brief description of the drawings
Fig. 1 illustrates for a kind of stereochemical structure of an angle of staggered form multi cycle pipe type heating device of the present utility model
Figure；
Fig. 2 is that a kind of stereochemical structure of another angle of staggered form multi cycle pipe type heating device of the present utility model is shown
It is intended to；
Fig. 3 is a kind of structural representation of staggered form multi cycle tube type water heating boiler of the present utility model；
Fig. 4 be the utility model in body of heater structural representation；
Fig. 5 is a kind of broken section structural representation of staggered form multi cycle tube type water heating boiler of the present utility model；
Fig. 6 is a kind of structural representation of the staggered form multi cycle tube type water heating boiler with burner of the present utility model
(burner is vertically arranged)；
Fig. 7 is a kind of structural representation of the staggered form multi cycle tube type water heating boiler with burner of the present utility model
(burner is laterally set).
Label declaration in schematic diagram：
1st, pipe type heating device；1-1, flue；1-2, horizontal water tube；1-3, vertical water pipe；1-4, horizontal water inlet pipe；1-5, longitudinal direction
Water inlet pipe；1-6, horizontal outlet pipe；1-7, longitudinal outlet pipe；1-8, water inlet pipe；1-9, outlet pipe；1-10, smoke exhaust pipe；1-11、
Protect warm water intake pipe；1-12, guarantor's water outlet pipe；2nd, body of heater；2-1, incubation cavity；2-2, body of heater inner bag；2-3, incubation cavity water inlet
Joint；2-4, incubation cavity water out adapter；2-5, spool；3rd, burner.
Embodiment
To further appreciate that content of the present utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment
With reference to shown in Fig. 1 and Fig. 2, a kind of staggered form multi cycle pipe type heating device of the present embodiment, including flue 1-1,
Horizontal water tube 1-2 and the vertical water pipe 1-3 arranged in a crossed manner with horizontal water tube 1-2, flue 1-1 side wall, which are provided with, to be used to install horizontal water tube
1-2 and vertical water pipe 1-3 hole, horizontal water tube 1-2 and vertical water pipe 1-3 are located in flue 1-1 reciprocally bendingly, and horizontal water tube 1-
2 and vertical water pipe 1-3 is alternately provided with multilayer in flue 1-1, and the horizontal water tube 1-2 of adjacent two layers is interlaced, and in flue
End to end successively from lower to upper in 1-1 to be open into circulation water route, this laterally passes through horizontal water inlet pipe 1-4 and transverse direction in circulation water route
Outlet pipe 1-6 corresponds to external water inlet pipe 1-8 and outlet pipe 1-9 respectively, and the vertical water pipe 1-3 of adjacent two layers is interlaced, and in stove
End to end into longitudinal water route of circulating successively from lower to upper in courage 1-1, longitudinally circulation water route is by longitudinal water inlet pipe 1-5 and indulges for this
External water inlet pipe 1-8 and outlet pipe 1-9 are corresponded to respectively to outlet pipe 1-7.Every layer of horizontal water tube 1-2 head and the tail are serially connected, and are formed
The horizontal circulation water route of backhaul more than one, every layer of vertical water pipe 1-3 is also serially connected from beginning to end, forms the longitudinal direction stream of backhaul more than one
Water flowing road, for the currency structure of water route, the cold water in water inlet pipe 1-8 is by 1-5 points of transverse direction water inlet pipe 1-4 and longitudinal water inlet pipe
For two-way, laterally circulate water route and longitudinal direction circulation water route are separately flowed into, after fully being heated in horizontal water tube 1-2 and vertical water pipe 1-3
Hot water is formed, then hot water is pooled in outlet pipe 1-9 by horizontal outlet pipe 1-6 and longitudinal direction outlet pipe 1-7, is provided out heat
Water.
A kind of staggered form multi cycle pipe type heating device of the present embodiment, utilizes the horizontal water tube 1-2 for intersecting and being staggered
Stroke of the combustion heat energy in pipe type heating device is greatly extended with vertical water pipe 1-3, combustion heat energy and water pipe is added
Heat-exchange time, greatly improved the utilization rate of heat energy, compared with conventional boiler structure, energy-conservation 50% or so, energy-conserving and environment-protective, heating
Quickly, instant-heating, fully meets the hot water use demand in the place such as hotel, community, bathroom, has saved hot water and used into
This.
Shown in hookup 1 and Fig. 2, in the present embodiment, flue 1-1 shape of cross section is rectangle, preferably square, no
Only play a part of concentrate firepower, also act as fixed horizontal water tube 1-2 and vertical water pipe 1-3 effect.Above-mentioned horizontal water tube 1-2 and vertical
Water pipe 1-3 square crossings, it is so simple in construction, it is easy to make, and contribute to increase heat energy and horizontal water tube 1-2 and vertical water pipe 1-
3 abundant contact heat-exchanging, more fully utilizes heat energy.In the present embodiment, every layer of adjacent two piece horizontal water tube 1-2 is used
Semi arch tube transitions are connected, and the vertical water pipe 1-3 of every layer of adjacent two piece is also connected using semi arch tube transitions, and horizontal water tube 1-2
It is made with vertical water pipe 1-3 of copper pipe, current flowing is smooth, heat transference efficiency is high, it is safe and reliable using stable.Specific system
When making, straight copper tube can be worn on flue 1-1 side wall now, then straight copper tube is together in series using the welding of semi arch copper pipe.
In addition, above-mentioned horizontal circulation water route and longitudinal direction circulation water route are using the turnover water-bound of bottom in and top out or upper entering and lower leaving, peace
Water route is connected and not limited strictly during dress, installs simple and convenient；Shown in Fig. 1 is the turnover water-bound using bottom in and top out.
The setting number of plies of horizontal water tube 1-2 and vertical water pipe 1-3 in flue 1-1 is depending on density is required according to specific design, it is preferred that often
Space in row horizontal water tube 1-2 and vertical water pipe 1-3 between adjacent two bars is equal or slightly larger than single tube external diameter, the horizontal stroke of adjacent two row
After water pipe 1-2 or vertical water pipes 1-3 staggers, upper strata pipe is just set to be located in the middle of the space between the pipe of lower floor two, so that heat exists
It is horizontal and vertical to rise in serpentine track, fully heating horizontal water tube 1-2 and vertical water pipe 1-3.In addition, in order to effectively discharge
Flue gas is risen, smoke exhaust pipe 1-10 is additionally provided with flue 1-1 top.
A kind of staggered form multi cycle pipe type heating device of the present embodiment, its making is structure as a whole, and is easily installed and uses,
Demolition and maintenance simultaneously are convenient to.As shown in Figure 3 and Figure 4, in the present embodiment, a kind of above-mentioned tubular type of application is also disclosed
The hot-water boiler of heater, the hot-water boiler includes heating provided with above-mentioned tubular type in body of heater 2, the body of heater inner bag 2-2 of body of heater 2
Device 1；The body of heater inner bag 2-2 structure snd size of body of heater 2 are corresponding with the structure snd size of pipe type heating device 1, are easy to tubular type
Heater is assembled, it is only necessary to which pipe type heating device 1 is fixed on into body of heater 2, installs simple and convenient, easy to disassemble to safeguard.
As shown in Figure 4 and Figure 5, the body of heater inner bag 2-2 peripheries of the body of heater 2 in the present embodiment are additionally provided with incubation cavity 2-1, the guarantor
Warm chamber 2-1 can use dry type insulating structure, can also use ability of swimming insulation construction.Preferably, the incubation cavity 2-1 in the present embodiment is adopted
Ability of swimming insulation construction is used, incubation cavity 2-1 is by protecting warm water intake pipe 1-11 and protecting water outlet pipe 1-12 respectively correspondingly with entering
Water pipe 1-8 is connected with outlet pipe 1-9, and the incubation cavity water supply connector 2- inside incubation cavity 2-1 is communicated with incubation cavity 2-1
3 and incubation cavity water out adapter 2-4, the water inlet pipe 1-8 and outlet pipe 1-9 of pipe type heating device 1 can separate all the way directly with it is corresponding
Incubation cavity water supply connector 2-3 be connected with incubation cavity water out adapter 2-4, can also be respectively adopted flexible pipe by water inlet pipe 1-8 and
Outlet pipe 1-9 is connected with corresponding incubation cavity water supply connector 2-3 and incubation cavity water out adapter 2-4.Using ability of swimming insulation construction,
More fully using the waste heat production hot water of heat energy, and the hot water produced directly imports delivery port and used, and further increases
Energy utilization rate.In addition, valve also can be set on water inlet pipe 1-8 and outlet pipe 1-9 to control water flow switch and flow.Protecting
The spool 2-5 for route arrangement is also equipped with warm chamber 2-1, available for the infomation detection such as water temperature and water level in incubation cavity 2-1.
Referring to shown in Fig. 6 and Fig. 7, in the present embodiment, the bottom of body of heater 2 is heated using combustion gas or oil burner 3, is taken
For coal-fired hot-water boiler, energy consumption is low, the feature of environmental protection is good.During specific installation, it is only necessary to which combustion gas or oil burner 3 are located at into water bath
The bottom of stove, the port of burner 3 is directed at the bottom of pipe type heating device 1, and burner 3 can be using described in Fig. 6
It is vertically arranged, also can be using the horizontal setting shown in Fig. 7.
Using a kind of staggered form multi cycle pipe type heating device of the present embodiment and using its hot-water boiler, intersection is utilized
And the horizontal water tube and vertical water pipe being staggered greatly extend stroke of the combustion heat energy in pipe type heating device, add combustion
Heat can be with water pipe heat-exchange time, greatly improved the utilization rate of heat energy, energy-conserving and environment-protective, heating is quick, and put into practice discovery,
After the pipe type heating device of the present embodiment, the smoke exhaust pipe of upper boiler can directly use plastic material, boiler casing temperature
It is greatly reduced, it is seen that the height of heat utilization rate, compared with conventional boiler structure, energy-conservation 50% or so；Meanwhile, added using the tubular type
The hot-water boiler of thermal, pipe type heating device is very easy to installation and removal, therefore safeguards very simple and convenient.
Schematically the utility model and embodiments thereof are described above, the description does not have restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So, if this area
Those of ordinary skill enlightened by it, do not departing from the case that the utility model creates objective, without creatively designing
The frame mode similar to the technical scheme and embodiment, all should belong to protection domain of the present utility model.
Claims (10)
1. a kind of staggered form multi cycle pipe type heating device, it is characterised in that：Including flue (1-1), horizontal water tube (1-2) and with
Horizontal water tube (1-2) vertical water pipe (1-3) arranged in a crossed manner, described horizontal water tube (1-2) and vertical water pipe (1-3) is worn reciprocally bendingly
It is located in flue (1-1), and horizontal water tube (1-2) and vertical water pipe (1-3) are alternately provided with multilayer in flue (1-1), it is adjacent
Two layers of horizontal water tube (1-2) is interlaced, and it is end to end successively from lower to upper in the flue (1-1) be open into circulation water route,
Transverse direction circulation water route corresponds to external water inlet pipe (1-8) by horizontal water inlet pipe (1-4) and horizontal outlet pipe (1-6) and gone out respectively
Water pipe (1-9), the vertical water pipe (1-3) of adjacent two layers is interlaced, and in the flue (1-1) from lower to upper successively it is end to end into
Longitudinal direction circulation water route, longitudinal direction circulation water route corresponds to outer tap into respectively by longitudinal water inlet pipe (1-5) and longitudinal outlet pipe (1-7)
Water pipe (1-8) and outlet pipe (1-9).
2. a kind of staggered form multi cycle pipe type heating device according to claim 1, it is characterised in that：Described flue
The shape of cross section of (1-1) is rectangle, described horizontal water tube (1-2) and vertical water pipe (1-3) square crossing.
3. a kind of staggered form multi cycle pipe type heating device according to claim 1 or 2, it is characterised in that：Described horizontal stroke
To circulation water route and longitudinal direction circulation water route using the turnover water-bound of bottom in and top out or upper entering and lower leaving.
4. a kind of staggered form multi cycle pipe type heating device according to claim 3, it is characterised in that：Every layer adjacent two
Root horizontal water tube (1-2) is using the connection of semi arch tube transitions, and every layer of vertical water pipe of adjacent two piece (1-3) also uses semi arch pipe
Transition is connected.
5. a kind of staggered form multi cycle pipe type heating device according to claim 4, it is characterised in that：Described flue
The top of (1-1) is additionally provided with smoke exhaust pipe (1-10).
6. a kind of staggered form multi cycle tube type water heating boiler, including body of heater (2), it is characterised in that：The body of heater of described body of heater (2)
Provided with the pipe type heating device (1) described in claim 1 to 5 any one in inner bag (2-2).
7. a kind of staggered form multi cycle tube type water heating boiler according to claim 6, it is characterised in that：Described body of heater
(2) body of heater inner bag (2-2) periphery is additionally provided with incubation cavity (2-1).
8. a kind of staggered form multi cycle tube type water heating boiler according to claim 7, it is characterised in that：Described incubation cavity
(2-1) uses ability of swimming insulation construction, and described incubation cavity (2-1) is by protecting warm water intake pipe (1-11) and protecting water outlet pipe
(1-12) is respectively correspondingly connected with water inlet pipe (1-8) and outlet pipe (1-9).
9. a kind of staggered form multi cycle tube type water heating boiler according to claim 8, it is characterised in that：Described incubation cavity
The spool (2-5) for route arrangement is also equipped with (2-1).
10. a kind of staggered form multi cycle tube type water heating boiler according to claim 6 to 9 any one, it is characterised in that：
Heated using combustion gas or oil burner (3) bottom of described body of heater (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720269099.4U CN206556243U (en) | 2017-03-20 | 2017-03-20 | A kind of staggered form multi cycle pipe type heating device and apply its hot-water boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720269099.4U CN206556243U (en) | 2017-03-20 | 2017-03-20 | A kind of staggered form multi cycle pipe type heating device and apply its hot-water boiler |
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| Publication Number | Publication Date |
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| CN206556243U true CN206556243U (en) | 2017-10-13 |
Family
ID=60365512
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720269099.4U Expired - Fee Related CN206556243U (en) | 2017-03-20 | 2017-03-20 | A kind of staggered form multi cycle pipe type heating device and apply its hot-water boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705424A (en) * | 2017-03-20 | 2017-05-24 | 杨军 | Criss-cross multi-cycle tubular heating device and hot-water boiler applying same |
-
2017
- 2017-03-20 CN CN201720269099.4U patent/CN206556243U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705424A (en) * | 2017-03-20 | 2017-05-24 | 杨军 | Criss-cross multi-cycle tubular heating device and hot-water boiler applying same |
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