CN110542148A - Domestic natural gas heating system - Google Patents
Domestic natural gas heating system Download PDFInfo
- Publication number
- CN110542148A CN110542148A CN201910922525.3A CN201910922525A CN110542148A CN 110542148 A CN110542148 A CN 110542148A CN 201910922525 A CN201910922525 A CN 201910922525A CN 110542148 A CN110542148 A CN 110542148A
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- CN
- China
- Prior art keywords
- heating
- natural gas
- cavity
- air
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 72
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000003345 natural gas Substances 0.000 title claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 239000000779 smoke Substances 0.000 claims abstract description 10
- 238000009833 condensation Methods 0.000 claims abstract description 7
- 230000005494 condensation Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/20—Casings or covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
-
- 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
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0488—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using fluid fuel
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1881—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Humidification (AREA)
Abstract
The invention relates to a household natural gas heating system which comprises a shell, a fresh air device, a heating device and a humidifier, and is characterized in that the fresh air device and the humidifier are installed in a suspended ceiling of a kitchen of a user and are connected with the heating device through an air supply pipeline; the fresh air device comprises a fresh air return inlet, a filter screen and a fan; the heating device is divided into a preheating cavity at the right side and a heating cavity at the left side; a water condensation disc and a part of the coiled pipe type heat exchanger are placed in the preheating cavity, and the smoke exhaust pipe is horizontally arranged behind the preheating cavity; the other part of the combustion chamber and the serpentine tube type heat exchanger are arranged in the heating cavity, and the air of the serpentine tube type heat exchanger in the heating cavity is communicated with the preheating cavity through a main pipe; the flue gas generated by natural gas combustion is adopted to directly heat air, and the low-temperature flue gas is utilized to preheat cold air, so that the temperature of the discharged flue gas is reduced.
Description
Technical Field
The invention relates to a heating system, and belongs to the technical field of heating equipment. In particular to a household natural gas heating system.
Background
The breadth of our country is vast, and the span between south and north is large. In northern areas, central heating is mostly adopted, and in southern areas, a heating system is not arranged because of short period in winter and high air temperature. The collective heating system mainly comprises a boiler room, a water supply pipeline and user heating equipment, and has the advantages of huge engineering quantity, complex system, high energy consumption, low heat efficiency, large consumption of manpower and material resources and inapplicability to the requirement of heating in winter in the south of China. In winter, heat is supplied, the room is closed for a long time, the oxygen content of the air is reduced, and the water content in the air is reduced, so that the room is suffocated, the air is dry, and people feel uncomfortable.
In addition, the heat exchange performance of the heat exchange device is poor, and the flue gas waste heat is not fully utilized, which is a main problem in the prior art. In the prior patent technology (such as a high-efficiency coil boiler CN201917072U), a boiler body is divided into a heating furnace and a preheating furnace to preheat water, so that the reutilization of the waste heat of a flue is improved, and the thermal efficiency of the boiler is improved; however, in the technology, fan coils are required to be installed at the tail ends of all rooms of user heating equipment, and daily maintenance is required, so that the workload of maintenance and management is large; and the fan coil carries out heat conversion once more, and heating efficiency reduces.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a household natural gas heating system. The household natural gas heating system is simple in structure, environment-friendly and energy-saving.
the technical scheme adopted by the invention is as follows: a household natural gas heating system is designed, which comprises a shell, a fresh air device, a heating device and a humidifier, and is characterized in that the fresh air device and the humidifier are arranged in a kitchen ceiling and are connected with the heating device through an air supply pipeline; the fresh air device comprises a fresh air return inlet, a filter screen, a No. 1 fan and an air mixing chamber; an electric air valve is arranged in the fresh air port and is positioned at the lower side of the air mixing chamber, and the No. 1 fan is arranged at the other end of the air mixing chamber; the heating device comprises a shell, a heating cavity and a preheating cavity; the shell is divided into a preheating cavity at the right side and a heating cavity at the left side, a water condensation disc, a coiled pipe type heat exchanger and a smoke exhaust pipe are arranged in the preheating cavity, an air inlet of the preheating pipe type heat exchanger is positioned at the right lower part of the preheating cavity and is connected with an air supply pipeline, and the water condensation disc is arranged below the coiled pipe type heat exchanger; the smoke exhaust pipe is horizontally arranged at the rear lower part of the preheating cavity; a combustion chamber and a serpentine tube type heat exchanger are arranged in the heating cavity, the heating cavity is communicated with air in the preheating cavity through a heat exchanger main pipe, and the combustion chamber is arranged below the heating cavity; the humidifier is connected with the air outlet of the heating pipe type heat exchanger through an air supply pipeline.
The shell in set up the baffle, separate into heating chamber and preheating chamber with the shell, seted up the through-hole on baffle upper portion, installation No. 2 fans in the through-hole for the flue gas of heating intracavity is introduced the preheating chamber under the effect of No. 2 fans, makes it preheat cold air.
A row of guide plates from low to high are arranged in front of an outlet of the No. 2 fan, so that smoke can uniformly flow downwards, and the coil pipe in the preheating cavity can be uniformly heated.
The condensed water tray is connected with a drain pipe, a neutralizer is arranged in the condensed water tray, and the generated condensed water is discharged out of the shell after being neutralized.
The serpentine tube type heat exchanger is made of copper and exchanges heat with flue gas generated by the combustion chamber.
the shell is made of anti-corrosion materials, and heat-insulating layers are arranged on the outer surface and in all pipelines.
Compared with the prior art, the household natural gas system has the following beneficial effects:
(1) The clean fuel using natural gas has the advantages of high combustion heat, no pollution, simple structure, low manufacturing cost, convenient maintenance and suitability for the small-scale winter heating requirement of families in the south.
(2) The limitation that an indoor unit and an outdoor unit must be arranged is avoided, the indoor space can be saved, and the indoor use area is effectively increased.
(3) The guide plate from low to high is arranged above the preheating cavity, so that the high-temperature flue gas pumped out by the axial flow fan changes the flow direction and flows downwards uniformly, the tubular heat exchanger in the preheating cavity is heated uniformly, and the service life of the heat exchanger is prolonged.
(4) The clean energy is adopted, the problem that the concentration of PM2.5 is increased due to the fact that combustion products generate micro particles is avoided, the air quality in the environment is improved, and the energy-saving and environment-friendly air conditioner has the advantages of being energy-saving and environment-friendly.
(5) The serpentine tube type heat exchanger adopts a main pipe to connect a plurality of branch pipes which are connected in parallel, the heat exchange area is increased, the flow of a single pipe is reduced, the resistance is reduced, and a counter-flow heat exchange mode is adopted, so that the heat exchange is more sufficient, and the heat exchange efficiency is higher.
(6) Fresh air is introduced into the room and the humidifier is used for humidifying hot air, so that the proper indoor humidity is maintained, and a working and living environment with proper temperature and humidity is provided.
Drawings
FIG. 1 is a schematic front view of an embodiment of a domestic natural gas heating system according to the present invention;
FIG. 2 is a schematic left side view of an embodiment of the domestic natural gas heating system of the present invention;
Fig. 3 is a schematic top view of an embodiment of the domestic natural gas heating system of the present invention.
In the figure, 1-fresh air inlet, 2-electric air valve, 3-return air inlet, 4-filter screen, 5-air mixing chamber, 6-No. 1 fan, 7, 22-air supply pipeline, 8-shell, 9-preheating chamber, 10-heating chamber, 11-condensate tray, 12-neutralizer, 13-air inlet, 14-coiled pipe type heat exchanger, 14-1-heat exchanger main pipe, 14-2-heat exchanger branch pipe, 15-guide plate, 16-through hole, No. 2 fan, 17-partition plate, 18-combustion chamber, 19-air outlet, 20-humidifier, 21-smoke outlet, No. 3 fan and 23-support.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described with reference to the following embodiments and the accompanying drawings.
The household natural gas heating system (a heating system for short, see fig. 1-3) is characterized by comprising a fresh air device, a heating device and a humidifier which are connected through an air supply pipeline. The fresh air device comprises a fresh air return inlet, a filter screen and a fan; the heating device is divided into a preheating cavity (right) and a heating cavity (left); a water condensation disc and a part of the coiled pipe type heat exchanger and a smoke exhaust pipe are arranged in the preheating cavity, and the smoke exhaust pipe is horizontally arranged behind the preheating cavity; the other part of the combustion chamber and the serpentine tube type heat exchanger are arranged in the heating cavity, and the air of the serpentine tube type heat exchanger in the heating cavity is communicated with the preheating cavity through a main pipe; the flue gas generated by natural gas combustion is adopted to directly heat air, and the low-temperature flue gas is used for preheating cold air, so that the temperature of the discharged flue gas is reduced, and the conversion rate is improved; the heat exchanger has the characteristics of low energy consumption, high heat transfer efficiency and no pollution, has a simple structure and lower manufacturing cost, and is suitable for the small-scale winter heating requirement of the north and south families.
Heating device and new trend device, the humidifier passes through the supply air duct and connects with the flange dish, snakelike tubular heat exchanger is parallelly connected by a plurality of branch pipes, is being responsible for and joins, each branch pipe is accomplished through the welding with being responsible for, bolt fixed connection is on casing and baffle for the fan, the guide plate welding is on the support.
The working principle and the working process of the heating system are simple (refer to figures 1-3): the air trend of the heating system is as follows: fresh air passes through the fresh air port 1, the filter screen 4 and the air mixing chamber 5, and return air passes through the return air port 3 and the air mixing chamber 5 and is fully mixed with the fresh air; the mixed air enters a heat exchanger branch pipe 14-2 to be preheated from bottom to top and is converged into a heat exchanger main pipe 14-1; preheated air enters the heating cavity 10 through the communicated heat exchanger main pipe 14-1 and is heated from top to bottom through the heat exchanger branch pipe 14-2, and hot air enters the humidifier 20 from the air outlet 19 through the air supply pipeline 22 for humidification, so that the hot air reaches comfortable humidity and heats rooms. The return air from each room enters the air mixing chamber 5 through the return air inlet 3 by using the electric air valve 2, completes one cycle, and starts the next cycle.
The high-temperature flue gas trend of the heat supply system is as follows: the high-temperature flue gas generated by the combustion chamber 18 firstly exchanges heat with the coiled tube type heat exchanger 14 in the heating cavity 10 from bottom to top and is converted into low-temperature flue gas, the low-temperature flue gas is introduced into the preheating cavity 9 from one side of the heating cavity 10 under the action of the No. 2 fan 16 on the partition plate 17, the low-temperature flue gas is uniformly distributed in the preheating cavity 9 through the guide plate 15 and exchanges heat with the coiled tube type heat exchanger 14 in the preheating cavity 9 from top to bottom, and the lower end of the preheating cavity is provided with a smoke outlet and a No. 3 fan 21 to discharge the. Meanwhile, the low-temperature flue gas after sufficient heat exchange generates condensed water, and the condensed water collected by the water condensation disc 11 is neutralized by the neutralizer 12 and then is discharged out of the shell through a drain pipe.
The invention relates to a household natural gas heating system which comprises a fresh air device, a heating device and a humidifier, wherein the fresh air device and the humidifier are arranged in a kitchen ceiling and are connected with the heating device through an air supply pipeline; the conversion rate is improved; the heat exchanger has the characteristics of low energy consumption, high heat transfer efficiency and no pollution, has a simple structure and lower manufacturing cost, and is particularly suitable for the requirements of small-scale winter heating of families in the south and north.
Nothing in this specification is said to apply to the prior art.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (7)
1. A household natural gas heating system comprises a shell, a fresh air device, a heating device and a humidifier, and is characterized in that the fresh air device and the humidifier are installed in a suspended ceiling of a kitchen of a user and are connected with the heating device through an air supply pipeline; the fresh air device comprises a fresh air return inlet, a filter screen and a fan; the heating device is divided into a preheating cavity at the right side and a heating cavity at the left side; a water condensation disc and a part of the coiled pipe type heat exchanger are placed in the preheating cavity, and the smoke exhaust pipe is horizontally arranged behind the preheating cavity; the other part of the combustion chamber and the serpentine tube type heat exchanger are arranged in the heating cavity, and the air of the serpentine tube type heat exchanger in the heating cavity is communicated with the preheating cavity through a main pipe; the flue gas generated by natural gas combustion is adopted to directly heat air, and the low-temperature flue gas is utilized to preheat cold air, so that the temperature of the discharged flue gas is reduced.
2. A domestic natural gas heating system according to claim 1, wherein: set up the baffle in the casing, will heating chamber and preheating chamber are separated into to the casing the through-hole has been seted up on baffle upper portion, installation No. 2 fans in the through-hole for the flue gas of heating intracavity is introduced the preheating chamber under the effect of No. 2 fans, makes it preheat cold air.
3. A domestic natural gas heating system according to claim 2, wherein: a row of guide plates from low to high are installed in front of the outlet of the No. 2 fan, smoke can flow downwards uniformly, and the coil pipe in the preheating cavity is heated uniformly.
4. A domestic natural gas heating system according to claim 3, wherein: the water condensation tray is connected with a water drainage pipe, the water drainage pipe is provided with a neutralizer, and condensed water generated by the process is neutralized and then is discharged out of the shell.
5. A domestic natural gas heating system according to claim 4, wherein: the serpentine tube type heat exchanger is made of copper and exchanges heat with the flue gas generated by the combustion chamber.
6. A domestic natural gas heating system according to claim 5, wherein: the shell is made of an anti-corrosion material.
7. A domestic natural gas heating system according to claim 6, wherein: and heat insulation layers are arranged on the outer surface of the shell and in all the pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910922525.3A CN110542148A (en) | 2019-09-27 | 2019-09-27 | Domestic natural gas heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910922525.3A CN110542148A (en) | 2019-09-27 | 2019-09-27 | Domestic natural gas heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110542148A true CN110542148A (en) | 2019-12-06 |
Family
ID=68714749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910922525.3A Pending CN110542148A (en) | 2019-09-27 | 2019-09-27 | Domestic natural gas heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110542148A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484138A (en) * | 2020-11-28 | 2021-03-12 | 杭州兔研工业设计有限公司 | Domestic natural gas heating system |
| CN113819541A (en) * | 2021-08-18 | 2021-12-21 | 杭州慧祥装饰工程有限公司 | Fresh air cooling and heating energy-saving air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291629Y (en) * | 1996-12-20 | 1998-09-16 | 黄瑜 | Split coal-fired hot-blast furnace |
| CN1309269A (en) * | 2001-02-17 | 2001-08-22 | 李承韩 | Hung central air conditioner |
| CN204084834U (en) * | 2014-09-03 | 2015-01-07 | 钱子涵 | Round trip domestic gas-fired water heater |
| CN204629684U (en) * | 2015-04-11 | 2015-09-09 | 李连顺 | A kind of novel Total heat exchange heating system |
| CN107726807A (en) * | 2017-11-06 | 2018-02-23 | 江毓铭 | A kind of multiple step drainage air-distribution device, drying chamber and dryer |
-
2019
- 2019-09-27 CN CN201910922525.3A patent/CN110542148A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291629Y (en) * | 1996-12-20 | 1998-09-16 | 黄瑜 | Split coal-fired hot-blast furnace |
| CN1309269A (en) * | 2001-02-17 | 2001-08-22 | 李承韩 | Hung central air conditioner |
| CN204084834U (en) * | 2014-09-03 | 2015-01-07 | 钱子涵 | Round trip domestic gas-fired water heater |
| CN204629684U (en) * | 2015-04-11 | 2015-09-09 | 李连顺 | A kind of novel Total heat exchange heating system |
| CN107726807A (en) * | 2017-11-06 | 2018-02-23 | 江毓铭 | A kind of multiple step drainage air-distribution device, drying chamber and dryer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484138A (en) * | 2020-11-28 | 2021-03-12 | 杭州兔研工业设计有限公司 | Domestic natural gas heating system |
| CN113819541A (en) * | 2021-08-18 | 2021-12-21 | 杭州慧祥装饰工程有限公司 | Fresh air cooling and heating energy-saving air conditioner |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191206 |
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| RJ01 | Rejection of invention patent application after publication |