CN113339862A - Range hood waste heat recovery system with active noise reduction device - Google Patents
Range hood waste heat recovery system with active noise reduction device Download PDFInfo
- Publication number
- CN113339862A CN113339862A CN202110655827.6A CN202110655827A CN113339862A CN 113339862 A CN113339862 A CN 113339862A CN 202110655827 A CN202110655827 A CN 202110655827A CN 113339862 A CN113339862 A CN 113339862A
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- Prior art keywords
- noise reduction
- range hood
- pipe
- waste heat
- heat recovery
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/0336—Noise absorbers by means of sound-absorbing materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
- F28D21/0007—Water heaters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a range hood waste heat recovery system with an active noise reduction device, which comprises a heat preservation water storage tank, an exhaust pipeline noise reduction system and a thermal radiation convection heat exchange system arranged in a range hood, wherein the top end of the thermal radiation convection heat exchange system is connected with the inlet end of the exhaust pipeline noise reduction system, the thermal radiation convection heat exchange system comprises a honeycomb column type oil smoke pipeline with a regular hexagon section, a double-spiral water pipe and a water inlet pipe, the honeycomb column type oil smoke pipeline and the double-spiral water pipe are arranged in a crossed manner, the top end of the double-spiral water pipe is connected with the water inlet pipe, and the bottom end of the double-spiral water pipe is connected with the heat preservation water storage tank. The honeycomb type double-helix cross-coupling microchannel heat exchanger is adopted to recycle the heat of oil smoke and steam in a kitchen, so that the energy-saving effect is achieved, and the energy utilization efficiency is improved.
Description
Technical Field
The invention relates to a waste heat recovery system of a range hood with an active noise reduction device, belonging to the technical field of range hoods.
Background
With the rapid development of social economy, the consumption situation of fossil energy is tense, so that people are forced to search new energy and save energy at the same time; the kitchen is an indispensable part of modern families and service industry restaurants, and the kitchen range has low heat efficiency and long service time, so that the waste of fuel gas is serious due to frequent use, and meanwhile, the noise of the range hood also troubles us. In order to better utilize the residual heat of oil smoke and steam and reduce the noise of the range hood, the residual heat recovery system of the range hood with the active noise reduction device is provided.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a waste heat recovery system of a range hood with an active noise reduction device, and solves the problems of energy consumption loss and noise disturbance of the range hood in the prior art.
In order to achieve the above object, the present invention adopts the following technical solutions:
the utility model provides a take range hood waste heat recovery system of initiative noise reduction device, including heat preservation water storage box, exhaust pipe noise reduction system, set up the thermal radiation convection heat transfer system in the lampblack absorber, the entry end of exhaust pipe noise reduction system is connected on thermal radiation convection heat transfer system top, thermal radiation convection heat transfer system includes that the cross-section is regular hexagon's honeycomb column type oil smoke pipeline, two spiral water pipes, the inlet tube, honeycomb column type oil smoke pipeline and two spiral water pipe cross arrangement, the inlet tube is connected on two spiral water pipe tops, heat preservation water storage box is connected to two spiral water pipe bottoms.
Preferably, the heat radiation convection heat exchange system further comprises an oil collection box and a primary filter screen, the primary filter screen is connected with the bottom end of the honeycomb column type oil smoke pipeline, and the oil collection box is located below the primary filter screen.
Preferably, the smoke exhaust pipeline noise reduction system comprises a curve injection pipeline, noise reduction cotton and a porous noise reduction plate, wherein the porous noise reduction plate is connected with the inner wall of the curve injection pipeline, and the noise reduction cotton is filled between the curve injection pipeline and the porous noise reduction plate.
Preferably, the combined control system for the air volume and the water volume further comprises a first air-sensitive sensor, a second air-sensitive sensor, a control panel and a solenoid valve for controlling the flow of the water inlet pipe, wherein the first air-sensitive sensor is positioned in the honeycomb column type oil smoke pipeline, the second air-sensitive sensor is positioned at the inlet end of the noise reduction system of the smoke exhaust pipeline, and the first air-sensitive sensor, the second air-sensitive sensor and the solenoid valve are all connected with the control panel.
Preferably, the number of the first gas sensor and the second gas sensor is two.
Preferably, still include level sensor, immersible pump, outlet pipe, level sensor is located heat preservation water storage box water inlet and connects the control panel, and the immersible pump is located heat preservation water storage box bottom, goes out the water piping connection heat preservation water storage box.
Preferably, the smoke and steam condensation heat transfer system is positioned at the inlet end of the smoke exhaust pipeline noise reduction system and comprises a volute, a motor, an impeller and a secondary filter screen, wherein the motor is installed in the range hood, and the secondary filter screen is installed at the inlet end of the smoke exhaust pipeline.
Preferably, the outer surfaces of the honeycomb column type oil smoke pipeline and the double-spiral type water pipe are coated with lotus leaf bionic nano coatings.
A range hood comprising a range hood waste heat recovery system with an active noise reduction device of any of the preceding claims.
The invention achieves the following beneficial effects:
1. the honeycomb type double-helix cross type heat exchange system can efficiently recover the heat of the oil smoke, improve the energy utilization rate, and accelerate the condensation rate by circulating cold water;
2. the smoke exhaust pipeline noise reduction system adopts multilayer noise reduction measures, so that the noise of the smoke exhaust pipeline can be effectively reduced;
3. the air quantity and water quantity combined control system can automatically adjust the air quantity of the motor and the flow of the water inlet pipe according to the concentration of the oil smoke, thereby avoiding the hysteresis of manual adjustment, improving the smoke exhaust efficiency and improving the air quality of a kitchen;
4. the outer surfaces of the honeycomb column type oil smoke pipeline and the double-spiral type water pipe are coated with the lotus leaf bionic nano coating, so that the oil collecting effect is enhanced, the later cleaning is facilitated, and the time and the labor are saved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view of the honeycomb double spiral cross tube of the present invention;
FIG. 3 is a cross-sectional view of a honeycomb double spiral cross tube of the present invention;
FIG. 4 is a schematic view of the coating of the honeycomb pillar type oil smoke pipe of the present invention;
FIG. 5 is a schematic view of the coating of the double helix water tube of the present invention;
FIG. 6 is a schematic view of a flue gas vapor condensation heat transfer system of the present invention;
FIG. 7 is a schematic view of the air quantity and water quantity combined control plate of the invention;
fig. 8 is a schematic view of a smoke evacuation and noise reduction system of the present invention.
The meaning of the reference symbols in the figures: 1-an oil collecting box; 2-primary filtering net; 3, switching on and off the range hood; 4-a first gas sensor; 5-honeycomb column type oil smoke pipeline; 51-lotus leaf bionic nano coating; 6-double helix type water pipe; 7-water inlet pipe; 8-an electromagnetic valve; 9-a second gas sensor; 10-flue gas steam condensation heat transfer system; 101-an impeller; 102-secondary filtering screen; 11-a smoke exhaust duct noise reduction system; 111-curved injection conduit; 112-noise reducing cotton; 113-porous noise reduction plate; 12-heat preservation water storage tank; 13-a liquid level sensor; 14-a submersible pump; 15-water outlet pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in FIG. 1, the overall structure of the invention is schematically shown, and the invention comprises a thermal radiation convection heat exchange system, a flue gas steam condensation heat transfer system 10, an air volume and water volume combined control system, a heat preservation water storage tank 12 and a smoke exhaust pipeline noise reduction system 11.
With reference to fig. 2 and 3, the heat radiation convection heat exchange system is mainly formed by cross-coupling the honeycomb column oil smoke pipeline 5 and the double-spiral water pipe 6, and the section of the honeycomb column oil smoke pipeline 5 is regular hexagon, so that the convection efficiency is improved; the top end of the double-spiral water pipe 6 is connected with a water inlet pipe 7, and the bottom end of the double-spiral water pipe 6 is connected with a heat-preservation water storage tank 12. The heat radiated by the hearth flame and the stove is transferred to the water in the spiral water pipe 6 through the honeycomb column oil smoke pipeline 5 and the double-spiral water pipe 6, and the water flows into the heat-preservation water storage tank 12 along the double-spiral water pipe 6 due to the self gravity. As shown in fig. 1, the thermal radiation convection heat exchange system further includes a primary filter screen 2 and an oil collection box 1, the primary filter screen 2 is installed at the bottom end of the honeycomb column type oil smoke pipeline 5 of the microchannel heat exchanger, and the oil collection box 1 is installed below the primary filter screen 2.
As shown in fig. 1 and 6, the flue gas steam condensation heat transfer system 10 includes a volute, a motor, an impeller 101, and a secondary filter screen 102. The motor is arranged in the range hood, the secondary filter screen 102 is arranged at the inlet of the smoke exhaust pipeline, and impurities in the oil smoke are filtered again.
As shown in fig. 5, the inner surface of the honeycomb column type oil smoke pipe 5 and the outer surface of the double-spiral water pipe 6 are both attached with the lotus leaf bionic nano coating 51, and impurities screened by the secondary filter screen 102 can flow into the oil collecting box 1 along the inner wall of the honeycomb column type oil smoke pipe 5. Flue gas and steam firstly pass through a primary filter screen 2 at an inlet of a honeycomb column type oil smoke pipeline 5 of the micro-channel heat exchanger, then the steam emits latent heat of vaporization in a flue gas steam condensation heat transfer system 10 and is transferred to water in a double-spiral water pipe 6 through the honeycomb column oil smoke pipeline 5 and the double-spiral water pipe 6, the water carrying heat flows into a heat preservation water storage tank 12 along the double-spiral water pipe 6, and cold water in the double-spiral water pipe 6 is favorable for accelerating the condensation rate.
Referring to fig. 1 and 7, the air volume and water volume combined control system includes a first gas sensor 4, a second gas sensor 9, a control panel, a tee joint, and an electromagnetic valve 8. The first gas sensor 4 is positioned in the honeycomb column type oil smoke pipeline 5, the second gas sensor 9 is positioned at the inlet end of the noise reduction system of the smoke exhaust pipeline, and the number of the first gas sensor 4 and the second gas sensor 9 is two. The electromagnetic valve 8 controls the water inlet flow of the two pipelines of the double-spiral water pipe 6 through a tee joint. All gas sensors and electromagnetic valves are connected with the control panel.
When the user presses down range hood switch 3, control panel signals of telecommunication opens solenoid valve 8, and inlet tube 7 begins to intake, and when the culinary art finishes the user and closes range hood switch 3, solenoid valve 8 closes, and inlet tube 7 stops intaking in the same way. When cooking oil smoke is increased, the first air-sensitive sensor 4 positioned at the inlet of the micro-channel honeycomb column type oil smoke pipeline 5 transmits a signal to the control panel, the control panel immediately increases the rotating speed of the motor, and simultaneously, the electromagnetic valve 8 is opened to be large, the flow of the water inlet pipe 7 is increased, so that the smoke exhaust effect is better; when cooking oil smoke becomes small, the second gas sensor 9 positioned in the smoke steam condensation heat transfer system 10 transmits signals to the control panel, and then the control panel reduces the rotating speed of the motor, turns off the electromagnetic valve 8 and reduces the flow of the water inlet pipe 7.
As shown in fig. 7, the flue gas passes through the thermal radiation convection heat transfer system and the flue gas steam condensation heat transfer system 10, then passes through the secondary filter screen 102, and then enters the smoke exhaust duct noise reduction system 11, the smoke exhaust duct noise reduction system adopts the curve injection duct 111, the porous noise reduction plate 113 is installed on the inner wall of the curve injection duct 111, and the space between the porous noise reduction plate 113 and the curve injection duct 111 is filled with noise reduction cotton 112, so that the noise of the flue gas in the noise reduction duct is greatly reduced, and finally the flue gas is discharged into the common flue.
The heat preservation water storage tank 12 can be arranged below the washing water tank by adopting a kitchen following formula, the water outlet pipeline 15 is connected with a water faucet, the submersible pump 14 is arranged at the bottom of the heat preservation water storage tank 12, when the hot water faucet is opened, the submersible pump 14 starts to work, and hot water in the heat preservation water storage tank 12 is conveyed to the water outlet pipeline 15. A liquid level sensor 13 connected with the control panel is arranged at the water inlet of the heat preservation water storage tank 12. When the heat preservation water storage tank 12 is full, the liquid level sensor 13 sends a signal to the control panel, and the control panel can stop the electromagnetic valve 8 and stop water inflow.
The specific working principle of the invention is as follows: when a user starts to cook, the range hood is opened, the range hood starts to work, the electromagnetic valve 8 is opened, the water inlet pipe 7 starts to inject water, oil smoke is increased in the cooking process, the first air-sensitive sensor 4 positioned at the inlet of the micro-channel honeycomb type smoke pipeline transmits signals to the control panel, the rotating speed of the motor is immediately increased by the control panel, the electromagnetic valve 8 is opened greatly, the flow of the water inlet pipe 7 is increased, the smoke exhaust effect is better, heat is transmitted to water through the micro-channel heat exchanger after the oil smoke enters the range hood, and hot water flows into the heat preservation water storage tank 12 along the double-spiral pipeline 6. When cooking is finished, oil smoke is reduced, a second gas sensor 9 positioned in the smoke steam condensation heat transfer system 10 transmits signals to the control panel, the control panel reduces the rotating speed of the motor, the electromagnetic valve 8 is closed, and the flow of the water inlet pipe 7 is reduced; finally, after cooking is finished completely, the user turns off the range hood, and the electromagnetic valve 8 controls the water inlet pipe 7 to stop water inlet. The oil smoke with absorbed heat enters a smoke exhaust pipeline noise reduction system and finally enters a public flue. After the meal is finished, the user can wash dishes with the hot water collected by the heat-preservation water storage tank 12.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a range hood waste heat recovery system of device of making an uproar falls in area initiative, its characterized in that, including heat preservation water storage box (12), exhaust pipe noise reduction system (11), set up the heat radiation convection heat transfer system in the lampblack absorber, the entry end of exhaust pipe noise reduction system is connected on heat radiation convection heat transfer system top, heat radiation convection heat transfer system includes that the cross-section is regular hexagon's honeycomb column type oil smoke pipeline (5), two spiral water pipe (6), inlet tube (7), honeycomb column type oil smoke pipeline (5) with two spiral water pipe (6) cross arrangement, inlet tube (7) are connected on two spiral water pipe (6) top, heat preservation water storage box (12) is connected to two spiral water pipe (6) bottom.
2. The waste heat recovery system of the range hood with the active noise reduction device according to claim 1, wherein the thermal radiation convection heat exchange system further comprises an oil collection box (1) and a primary filter screen (2), the primary filter screen (2) is connected to the bottom end of the honeycomb pillar type oil smoke pipeline (5), and the oil collection box (1) is located below the primary filter screen (2).
3. The range hood waste heat recovery system with the active noise reduction device according to claim 1, wherein the smoke exhaust duct noise reduction system (11) comprises a curve injection duct (111), noise reduction cotton (112) and a porous noise reduction plate (113), the porous noise reduction plate (113) is connected with the inner wall of the curve injection duct (111), and the noise reduction cotton (112) is filled between the curve injection duct (111) and the porous noise reduction plate (113).
4. The range hood waste heat recovery system with the active noise reduction device according to claim 1, further comprising a combined air volume and water volume control system, wherein the combined air volume and water volume control system comprises a first gas sensor (4), a second gas sensor (9), a control panel and a solenoid valve (8) for controlling the flow of the water inlet pipe (7), the first gas sensor (4) is located in the honeycomb column type oil smoke pipeline (5), the second gas sensor (9) is located at the inlet end of the noise reduction system of the smoke exhaust pipeline, and the first gas sensor (4), the second gas sensor (9) and the solenoid valve (8) are all connected with the control panel.
5. The waste heat recovery system of the range hood with the active noise reduction device according to claim 4, wherein the number of the first gas sensor (4) and the second gas sensor (9) is two.
6. The range hood waste heat recovery system with the active noise reduction device according to claim 4, further comprising a liquid level sensor (13), a submersible pump (14), and a water outlet pipe (15), wherein the liquid level sensor (13) is located at a water inlet of the heat preservation water storage tank (12) and connected to the control board, the submersible pump (14) is located at the bottom of the heat preservation water storage tank (12), and the water outlet pipe (15) is connected to the heat preservation water storage tank (12).
7. The waste heat recovery system of the range hood with the active noise reduction device according to claim 1, further comprising a flue gas steam condensation heat transfer system (10) located at an inlet end of the noise reduction system of the exhaust smoke duct, wherein the flue gas steam condensation heat transfer system (10) comprises a volute, a motor, an impeller (101) and a secondary filter screen (102), the motor is installed in the range hood, and the secondary filter screen (102) is installed at the inlet end of the exhaust smoke duct.
8. The range hood waste heat recovery system with the active noise reduction device according to claim 1, wherein the outer surfaces of the honeycomb cylindrical oil smoke pipeline (5) and the double-spiral water pipe (6) are coated with a lotus leaf bionic nano coating (51).
9. A range hood comprising the range hood waste heat recovery system with an active noise reduction device of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110655827.6A CN113339862A (en) | 2021-06-11 | 2021-06-11 | Range hood waste heat recovery system with active noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110655827.6A CN113339862A (en) | 2021-06-11 | 2021-06-11 | Range hood waste heat recovery system with active noise reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113339862A true CN113339862A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110655827.6A Pending CN113339862A (en) | 2021-06-11 | 2021-06-11 | Range hood waste heat recovery system with active noise reduction device |
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| Country | Link |
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| CN (1) | CN113339862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484834A (en) * | 2022-01-20 | 2022-05-13 | 西安工程大学 | Waste heat recovery device for heating ventilation air conditioner |
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| CN101749779A (en) * | 2010-02-10 | 2010-06-23 | 嘉兴市永宏锅炉制造有限公司 | Multi-purpose daily-use water heater |
| CN201828165U (en) * | 2010-06-07 | 2011-05-11 | 长沙贝尔环保节能设备有限公司 | Double-curve silencer for cooling tower |
| CN105605709A (en) * | 2011-06-25 | 2016-05-25 | 荣国华 | Air conditioning system capable of recycling heat energy of kitchen |
| CN105650848A (en) * | 2015-12-29 | 2016-06-08 | 西安建筑科技大学 | S-shaped coupling elbow silencing and denoising device and silencing and denoising treatment method thereof |
| CN205690687U (en) * | 2016-06-24 | 2016-11-16 | 北京奥林匹亚锅炉有限公司 | A kind of flame-resistant sheet and there is the efficient boiler of this flame-resistant sheet |
| CN205896541U (en) * | 2016-06-01 | 2017-01-18 | 四川五环石化装备有限公司 | Device of making an uproar falls in bending |
| CN108592119A (en) * | 2018-06-30 | 2018-09-28 | 佛山市治亮环保科技有限公司 | Kitchen ventilator residual neat recovering system |
| CN211536074U (en) * | 2019-12-30 | 2020-09-22 | 北京怡和嘉业医疗科技股份有限公司 | Noise reduction structure for ventilation therapy device and ventilation therapy device |
-
2021
- 2021-06-11 CN CN202110655827.6A patent/CN113339862A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2282139Y (en) * | 1996-11-26 | 1998-05-20 | 杨全友 | High efficiency heating range and bath stove |
| CN101749779A (en) * | 2010-02-10 | 2010-06-23 | 嘉兴市永宏锅炉制造有限公司 | Multi-purpose daily-use water heater |
| CN201828165U (en) * | 2010-06-07 | 2011-05-11 | 长沙贝尔环保节能设备有限公司 | Double-curve silencer for cooling tower |
| CN105605709A (en) * | 2011-06-25 | 2016-05-25 | 荣国华 | Air conditioning system capable of recycling heat energy of kitchen |
| CN105650848A (en) * | 2015-12-29 | 2016-06-08 | 西安建筑科技大学 | S-shaped coupling elbow silencing and denoising device and silencing and denoising treatment method thereof |
| CN205896541U (en) * | 2016-06-01 | 2017-01-18 | 四川五环石化装备有限公司 | Device of making an uproar falls in bending |
| CN205690687U (en) * | 2016-06-24 | 2016-11-16 | 北京奥林匹亚锅炉有限公司 | A kind of flame-resistant sheet and there is the efficient boiler of this flame-resistant sheet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114484834A (en) * | 2022-01-20 | 2022-05-13 | 西安工程大学 | Waste heat recovery device for heating ventilation air conditioner |
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