CN112128980A - Heat exchange structure with self-cleaning function and wall-mounted furnace using same - Google Patents
Heat exchange structure with self-cleaning function and wall-mounted furnace using same Download PDFInfo
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- CN112128980A CN112128980A CN202010909346.9A CN202010909346A CN112128980A CN 112128980 A CN112128980 A CN 112128980A CN 202010909346 A CN202010909346 A CN 202010909346A CN 112128980 A CN112128980 A CN 112128980A
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- self
- heat exchange
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- exchange structure
- pipe
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- 238000004140 cleaning Methods 0.000 title claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 152
- 239000010865 sewage Substances 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract description 4
- 238000005406 washing Methods 0.000 description 5
- 239000003517 fume Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/06—Arrangement of mountings or supports for heaters, e.g. boilers, other than space heating radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/16—Arrangements for water drainage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a heat exchange structure with a self-cleaning function and a wall-mounted furnace using the same, wherein the heat exchange structure with the self-cleaning function comprises a heat exchange structure body, a self-cleaning water pipe assembly and a control assembly, the self-cleaning water pipe assembly is vertically arranged at the bottom of an inner cavity of the heat exchange structure body and used for rotatably cleaning the inner cavity of the heat exchange structure body, and the control assembly is arranged on the self-cleaning water pipe assembly outside the heat exchange structure body and used for controlling water inflow of the self-cleaning water pipe assembly. According to the heat exchange structure with the self-cleaning function, the inner cavity of the heat exchange structure body is cleaned in a rotating mode through the self-cleaning water pipe assembly, the inner cavity of the heat exchange structure body can be cleaned automatically without disassembling the heat exchange structure, the cleaning process is time-saving and labor-saving, therefore, the coil pipe gap of the heat exchange structure is guaranteed not to be reduced, heat exchange and smoke exhaust are normal, and the service life of the heat exchange structure is prolonged.
Description
Technical Field
The invention belongs to the technical field of wall-mounted furnaces, and particularly relates to a heat exchange structure with a self-cleaning function and a wall-mounted furnace using the heat exchange structure.
Background
General hanging stove adopts coil pipe heat transfer structure more, but heat transfer structure's coil pipe interval is very little, generally below 1mm, and one time is long, and the coil pipe clearance is just blockked up by the foreign matter very easily to influence the heat transfer effect.
The traditional method for cleaning the heat exchange structure comprises the following steps: the heat exchange structure is disassembled, the heat exchange structure is cleaned by the soft brush, then the cleaned solid particles are sucked away by the dust collector, and the heat exchange structure and the product are installed and returned again in a mode, so that the cleaning process is time-consuming and labor-consuming.
Disclosure of Invention
In order to solve the problems, the invention provides a heat exchange structure with a self-cleaning function, which can automatically clean the inner cavity of the heat exchange structure, and the cleaning process is time-saving and labor-saving.
Another object of the present invention is to provide a wall hanging stove.
The technical scheme adopted by the invention is as follows:
the utility model provides a take heat transfer structure of self-cleaning function, includes heat transfer structure body, self-cleaning water pipe assembly and control assembly, the self-cleaning water pipe assembly is vertical to be installed in heat transfer structure body inner chamber bottom in order to be used for the rotatory heat transfer structure body inner chamber that washs, control assembly installs on the outside self-cleaning water pipe assembly of heat transfer structure body, in order to be used for controlling the self-cleaning water pipe assembly is intake.
Preferably, the sewage collecting assembly comprises a sewage pipe and a sewage box, the sewage pipe is communicated with the bottom of the heat exchange structure body and used for discharging sewage after self-cleaning, and the sewage box is connected below the sewage pipe.
Preferably, the heat exchange structure body includes casing, lower extreme cover and inlet tube, the lower extreme cover sets up the casing bottom, the inlet tube is vertical to be set up lower extreme cover outside bottom central point puts, the inlet tube bottom is equipped with indent round platform.
Preferably, self-cleaning water pipe assembly is including wasing water pipe, L shape branch pipe, water inlet hose and sealing member, wash the vertical top of installing at L shape branch pipe of water pipe, L shape branch pipe cup joints just the butt is in the water inlet pipe on the indent round platform, water inlet hose connects the inlet tube bottom, the sealing member ring joint be in on the lateral wall that L shape branch pipe and inlet tube meet in order to be used for preventing sewage inflow inlet tube.
Preferably, the side wall of the cleaning water pipe is provided with a plurality of inclined water outlet holes, so that water ejected from the water outlet holes can generate reaction force after being sprayed into the inner cavity of the heat exchange structure body, and the cleaning water pipe can rotate around the water inlet pipe.
Preferably, the cleaning water pipe is at least sleeved by two water pipes with different diameters, the two water pipes are connected by adopting a telescopic piece, so that the inner water pipe extends upwards to spray water together with the outer water pipe when spraying water, and the two water pipes are completely sleeved together when not spraying water.
Preferably, the telescopic member is a spring.
Preferably, the seal is a sealing ring.
Preferably, the control assembly comprises a solenoid valve and a water pump, the solenoid valve and the water pump are both mounted on a self-cleaning water pipe assembly outside the heat exchange structure body, and the water pump is mounted far away from the heat exchange structure body relative to the solenoid valve.
The other technical scheme of the invention is realized as follows:
the wall-mounted furnace comprises the heat exchange structure with the self-cleaning function and a wall-mounted furnace body, wherein the heat exchange structure with the self-cleaning function is arranged in the wall-mounted furnace body.
Compared with the prior art, the heat exchange structure with the self-cleaning function has the advantages that the inner cavity of the heat exchange structure body can be cleaned in a rotating mode through the self-cleaning water pipe assembly, the inner cavity of the heat exchange structure body can be cleaned automatically without disassembling the heat exchange structure, time and labor are saved in the cleaning process, accordingly, the coil pipe gap of the heat exchange structure cannot be reduced, heat exchange and smoke exhaust are normal, and the service life of the heat exchange structure is prolonged.
Drawings
Fig. 1 is a schematic view of the overall structure of a heat exchange structure with a self-cleaning function according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a heat exchange structure with a self-cleaning function according to embodiment 1 of the present invention;
fig. 3 is a partial structural schematic view of a water inlet pipe of a heat exchange structure with a self-cleaning function provided in embodiment 1 of the invention;
description of the reference numerals
1-heat exchange structure body, 11-shell, 12-lower end cover, 13-water inlet pipe, 2-self-cleaning water pipe assembly, 21-cleaning water pipe, 22-L-shaped branch pipe, 23-water inlet hose, 24-sealing element, 3-control assembly, 31-electromagnetic valve, 32-water pump, 4-sewage collection assembly, 41-sewage pipe, 42-sewage box and 5-wall-hanging furnace body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Embodiment 1 of the present invention provides a heat exchange structure with a self-cleaning function, as shown in fig. 1-3, comprising a heat exchange structure body 1, a self-cleaning water pipe assembly 2 and a control assembly 3, wherein the self-cleaning water pipe assembly 2 is vertically installed at the bottom of an inner cavity of the heat exchange structure body 1 for rotatably cleaning the inner cavity of the heat exchange structure body 1, and the control assembly 3 is installed on the self-cleaning water pipe assembly 2 outside the heat exchange structure body 1 for controlling water inflow of the self-cleaning water pipe assembly 2.
Like this, through the rotatory 1 inner chamber of heat transfer structure body of washing of self-cleaning water pipe subassembly 2, intake through control assembly 3 control self-cleaning water pipe subassembly 2, can realize need not dismantling heat transfer structure, can carry out self-cleaning to heat transfer structure inner chamber, the cleaning process saves time, laborsaving to guarantee that heat transfer structure coil pipe clearance can not diminish, the heat transfer, discharge fume normally, extension heat transfer structure's life. Wherein, the self-cleaning water pipe component 2 can be made of stainless steel.
The heat exchange structure further comprises a sewage collecting assembly 4, the sewage collecting assembly 4 comprises a sewage pipe 41 and a sewage box 42, the sewage pipe 41 is communicated with the bottom of the heat exchange structure body 1 and used for discharging sewage after self-cleaning, and the sewage box 42 is connected below the sewage pipe 41.
Therefore, after the sewage at the bottom of the heat exchange structure body 1 is discharged through the sewage pipe 41, the sewage is collected into the sewage box 42, the screw cap is arranged at the bottom of the sewage box 42, and when the sewage is more, the sewage in the sewage box 42 can be discharged by unscrewing the screw cap.
The heat exchange structure body 1 comprises a shell 11, a lower end cover 12 and a water inlet pipe 13, wherein the lower end cover 12 is arranged at the bottom of the shell 11, the water inlet pipe 13 is vertically arranged at the central position of the bottom of the outer side of the lower end cover 12, and an inwards concave circular table is arranged at the bottom of the water inlet pipe 13.
Therefore, the cleaning water pipe 21 sleeved in the water inlet pipe 13 can be supported and fixed from the bottom through the concave circular truncated cone at the bottom of the water inlet pipe 13.
Self-cleaning water pipe subassembly 2 is including wasing water pipe 21, L shape branch pipe 22, intake hose 23 and sealing member 24, wash water pipe 21 vertical installation at the top of L shape branch pipe 22, L shape branch pipe 22 cup joints in the inlet tube 13 and the butt is in on the concave round platform, intake hose 23 is connected inlet tube 13 bottom, sealing member 24 cup joints on the lateral wall that L shape branch pipe 22 and inlet tube 13 meet in order to be used for preventing sewage inflow inlet tube 13.
Thus, clean water is pumped from the water inlet hose 23, and after the clean water flows through the L-shaped branch pipe 22 from the water inlet pipe 13, the clean water is sprayed out from the cleaning water pipe 21 to clean the inner cavity of the heat exchange structure body 1, and the sewage cleaned by the sealing element 24 mode flows into the water inlet pipe 13.
The side wall of the cleaning water pipe 23 is provided with a plurality of inclined water outlet holes for the water ejected from the water outlet holes to jet on the inner cavity of the heat exchange structure body 1 to generate a reaction force, so that the cleaning water pipe 21 rotates around the water inlet pipe 13.
Like this, after spouting slope water column to 1 inner chamber of heat transfer structure body through the apopore of a plurality of slopes on the 23 lateral walls of washing water pipe, washing water pipe 23 produces the reaction force of slope, decomposes reaction force and can produces normal force and circular orbit's tangential force (because 1 inner chamber coil pipe circumference of heat transfer structure body sets up), so washing water pipe 23 uses inlet tube 13 to rotate for circular, the coil pipe that 1 inner chamber circumference of heat transfer structure body set up is washd in the rotation.
The cleaning water pipe 21 is at least formed by sleeving two water pipes with different diameters, the two water pipes are connected by adopting a telescopic piece, so that the inner water pipe extends upwards to spray water together with the outer water pipe when spraying water, and the two water pipes are completely sleeved together when not spraying water.
Thus, when the coil pipe in the inner cavity of the heat exchange structure body 1 is automatically cleaned, after clean water is pumped into the cleaning water pipe 21 through the water pump 32, when the generated water pressure reaches more than 0.1MPa, the inner water pipe can extend upwards under the water pressure, and meanwhile, the outer water pipe is connected due to the existence of the telescopic piece, so that the inner water pipe and the outer water pipe are connected into a whole and can clean and spray water to the coil pipe in the inner cavity of the heat exchange structure body 1; when stopping self-cleaning, closing the water pump, water pressure reduces, and inside water pipe falls back down like outside water pipe again because of the reason of extensible member to can prevent to wash water pipe 21 and flame contact when the combustor during operation, avoid burning out washing water pipe 21 for a long time.
The telescopic part is a spring.
Therefore, the outer water pipe and the inner water pipe can be connected together by the spring through the telescopic piece, and meanwhile, when the automatic cleaning is stopped, the inner water pipe is pulled back into the outer water pipe through the elastic force of the spring, so that the contact with flame is prevented from being burnt out.
The sealing element 23 is a sealing ring.
Therefore, the sealing piece 23 is a sealing ring, so that sewage generated after cleaning in the heat exchange structure body 1 can be prevented from entering the water inlet pipe 13.
The control assembly 3 comprises a solenoid valve 31 and a water pump 32, the solenoid valve 31 and the water pump 32 are both mounted on the self-cleaning water pipe assembly 2 outside the heat exchange structure body 1, and the water pump 32 is mounted far away from the heat exchange structure body 1 relative to the solenoid valve 31.
Thus, clean water is pumped into the water inlet hose 23 by the water pump 32, and the flow of water in the water inlet hose 23 is opened or closed by the solenoid valve 31.
According to the heat exchange structure with the self-cleaning function, the inner cavity of the heat exchange structure body is cleaned in a rotating mode through the self-cleaning water pipe assembly, the inner cavity of the heat exchange structure body can be cleaned automatically without disassembling the heat exchange structure, the cleaning process is time-saving and labor-saving, therefore, the coil pipe gap of the heat exchange structure is guaranteed not to be reduced, heat exchange and smoke exhaust are normal, and the service life of the heat exchange structure is prolonged.
Example 2
Embodiment 2 of the present invention provides a wall-hanging stove, which includes the heat exchange structure with the self-cleaning function and a wall-hanging stove body 5, wherein the heat exchange structure with the self-cleaning function is installed in the wall-hanging stove body 5.
Like this, can guarantee through the heat transfer structure of taking the self-cleaning function that the coil pipe is clean in the hanging stove body 5, and the clearance does not have the foreign matter, and heat transfer, the normal of discharging fume.
According to the wall-mounted furnace, the inner cavity of the heat exchange structure body is cleaned in a rotating mode through the self-cleaning water pipe assembly, the inner cavity of the heat exchange structure body can be automatically cleaned without disassembling the heat exchange structure, the cleaning process is time-saving and labor-saving, therefore, the coil pipe gap of the heat exchange structure of the wall-mounted furnace is guaranteed not to be reduced, heat exchange and smoke exhaust are normal, and the service life of the heat exchange structure of the wall-mounted furnace is prolonged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a take heat transfer structure of self-cleaning function, its characterized in that, includes heat transfer structure body (1), self-cleaning water pipe assembly (2) and control assembly (3), self-cleaning water pipe assembly (2) are vertical to be installed in heat transfer structure body (1) inner chamber bottom in order to be used for the rotatory heat transfer structure body (1) inner chamber that washs, control assembly (3) are installed on heat transfer structure body (1) outside self-cleaning water pipe assembly (2) for be used for control self-cleaning water pipe assembly (2) are intake.
2. The heat exchange structure with self-cleaning function according to claim 1, further comprising a sewage collection assembly (4), wherein the sewage collection assembly (4) comprises a sewage pipe (41) and a sewage box (42), the sewage pipe (41) is communicated at the bottom of the heat exchange structure body (1) for discharging the self-cleaned sewage, and the sewage box (42) is connected below the sewage pipe (41).
3. The heat exchange structure with the self-cleaning function according to claim 1 or 2, wherein the heat exchange structure body (1) comprises a shell (11), a lower end cover (12) and a water inlet pipe (13), the lower end cover (12) is arranged at the bottom of the shell (11), the water inlet pipe (13) is vertically arranged at the bottom center position of the outer side of the lower end cover (12), and the bottom of the water inlet pipe (13) is provided with an inner concave circular truncated cone.
4. The heat exchange structure with self-cleaning function according to claim 3, wherein the self-cleaning water pipe assembly (2) comprises a cleaning water pipe (21), an L-shaped branch pipe (22), a water inlet hose (23) and a sealing element (24), the cleaning water pipe (21) is vertically installed at the top of the L-shaped branch pipe (22), the L-shaped branch pipe (22) is sleeved in the water inlet pipe (13) and abutted against the inner concave circular table, the water inlet hose (23) is connected at the bottom of the water inlet pipe (13), and the sealing element (24) is annularly connected to the side wall of the L-shaped branch pipe (22) connected with the water inlet pipe (13) for preventing sewage from flowing into the water inlet pipe (13).
5. The heat exchange structure with self-cleaning function according to claim 4, wherein the side wall of the cleaning water pipe (23) is provided with a plurality of inclined water outlet holes, so that water ejected from the water outlet holes can generate a reaction force after being sprayed into the inner cavity of the heat exchange structure body (1), and the cleaning water pipe (21) can rotate around the water inlet pipe (13).
6. The heat exchange structure with self-cleaning function according to claim 4, wherein the cleaning water pipe (21) is at least sleeved by two water pipes with different diameters, the two water pipes are internally connected by a telescopic member, so that the inner water pipe extends upwards to spray water together with the outer water pipe when spraying water, and the two water pipes are completely sleeved together when not spraying water.
7. The heat exchange structure with a self-cleaning function according to claim 6, wherein the expansion member is a spring.
8. Heat exchanging structure with self-cleaning function according to claim 4, characterised in that the sealing element (23) is a sealing ring.
9. A heat exchanging structure with self-cleaning function according to claim 3, characterized in that the control assembly (3) comprises a solenoid valve (31) and a water pump (32), both the solenoid valve (31) and the water pump (32) being mounted on the self-cleaning water pipe assembly (2) outside the heat exchanging structure body (1), the water pump (32) being mounted remote from the heat exchanging structure body (1) with respect to the solenoid valve (31).
10. Wall-hanging stove, characterized in that it comprises a heat exchange structure with self-cleaning function according to any one of claims 1 to 9 and a wall-hanging stove body (5), the heat exchange structure with self-cleaning function being installed inside the wall-hanging stove body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010909346.9A CN112128980A (en) | 2020-09-02 | 2020-09-02 | Heat exchange structure with self-cleaning function and wall-mounted furnace using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010909346.9A CN112128980A (en) | 2020-09-02 | 2020-09-02 | Heat exchange structure with self-cleaning function and wall-mounted furnace using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112128980A true CN112128980A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010909346.9A Pending CN112128980A (en) | 2020-09-02 | 2020-09-02 | Heat exchange structure with self-cleaning function and wall-mounted furnace using same |
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| CN (1) | CN112128980A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006016963U1 (en) * | 2006-11-03 | 2007-02-08 | Maxxtec Ag | Cleaning device comprising cleaner mounted on movable slits and located in inner chamber and transferable via discharge opening |
| CN203323598U (en) * | 2013-05-24 | 2013-12-04 | 无锡博康节能科技有限公司 | Self-cleaning waste water heat energy recovery device |
| CN104279759A (en) * | 2014-08-13 | 2015-01-14 | 广东万家乐燃气具有限公司 | Self-cleaning gas water heater and automatic cleaning method thereof |
| CN105588457A (en) * | 2015-12-04 | 2016-05-18 | 周永伟 | Full-automatic clean heat energy recovery device |
| CN207422680U (en) * | 2017-11-01 | 2018-05-29 | 唐山帝马科技有限公司 | It is a kind of can cleaning and descaling automatically burnt gas wall hanging furnace |
| CN109737798A (en) * | 2019-02-14 | 2019-05-10 | 华彤 | A kind of heat pump exchanger |
| CN209085429U (en) * | 2018-10-25 | 2019-07-09 | 沃斯坦热力设备（天津）有限公司 | A kind of flue gas heat-exchange unit can on-line maintenance formula flusher |
-
2020
- 2020-09-02 CN CN202010909346.9A patent/CN112128980A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006016963U1 (en) * | 2006-11-03 | 2007-02-08 | Maxxtec Ag | Cleaning device comprising cleaner mounted on movable slits and located in inner chamber and transferable via discharge opening |
| CN203323598U (en) * | 2013-05-24 | 2013-12-04 | 无锡博康节能科技有限公司 | Self-cleaning waste water heat energy recovery device |
| CN104279759A (en) * | 2014-08-13 | 2015-01-14 | 广东万家乐燃气具有限公司 | Self-cleaning gas water heater and automatic cleaning method thereof |
| CN105588457A (en) * | 2015-12-04 | 2016-05-18 | 周永伟 | Full-automatic clean heat energy recovery device |
| CN207422680U (en) * | 2017-11-01 | 2018-05-29 | 唐山帝马科技有限公司 | It is a kind of can cleaning and descaling automatically burnt gas wall hanging furnace |
| CN209085429U (en) * | 2018-10-25 | 2019-07-09 | 沃斯坦热力设备（天津）有限公司 | A kind of flue gas heat-exchange unit can on-line maintenance formula flusher |
| CN109737798A (en) * | 2019-02-14 | 2019-05-10 | 华彤 | A kind of heat pump exchanger |
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Application publication date: 20201225 |