CN210921339U - Steam generator based on rotary cup type fuel oil burner - Google Patents
Steam generator based on rotary cup type fuel oil burner Download PDFInfo
- Publication number
- CN210921339U CN210921339U CN201920150436.7U CN201920150436U CN210921339U CN 210921339 U CN210921339 U CN 210921339U CN 201920150436 U CN201920150436 U CN 201920150436U CN 210921339 U CN210921339 U CN 210921339U
- Authority
- CN
- China
- Prior art keywords
- fuel oil
- type fuel
- cup type
- oil burner
- steam
- 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.)
- Expired - Fee Related
Links
- 239000000295 fuel oil Substances 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000010926 purge Methods 0.000 claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 3
- 230000000875 corresponding effect Effects 0.000 claims description 24
- 238000002485 combustion reaction Methods 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 230000008014 freezing Effects 0.000 abstract 1
- 238000005554 pickling Methods 0.000 description 10
- 239000002283 diesel fuel Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 7
- 230000005484 gravity Effects 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000012075 bio-oil Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Images
Landscapes
- Air Supply (AREA)
Abstract
The utility model belongs to the field of steam generators and food processing, and relates to a steam generator based on a revolving cup type fuel oil burner, which comprises a frame, a control system, a pipeline system, a gas-liquid separator, a revolving cup type fuel oil burner, a heating heat exchanger and a purging system; the pipeline system comprises an acid washing unit, a water inlet pump, a circulating water pump and an electromagnetic valve bank, wherein the electromagnetic valve bank is a combination of a plurality of electromagnetic valves, and the gas-liquid separator comprises a separation tank, a steam pressure sensor, a steam temperature sensor and a water level sensor; the rotary cup type fuel oil burner is used as a heat source; the heating heat exchanger comprises a heat exchange unit, a closed heat-preservation shell and a smoke outlet; this steam generator, under the height of height above sea level 0 ~ 5000m, all can high-efficiently produce steam, compact structure, the ignition is easy, the burning is complete, do not emit black cigarette, high-efficient, operation are stable, but automatic control operation, self-cleaning, automatic purge evacuation to can prevent that pipeline and components and parts from freezing and remaining deposit the pollution that the water caused.
Description
Technical Field
The invention belongs to the field of steam generators and food processing, and relates to a steam generator based on a rotary cup type fuel oil burner.
Background
The fuel oil has the characteristics of high burning point, large burning value and easiness in storage, and is often applied to some occasions of field power shortage or frequent migration; for some units which are frequently operated in the field, a steam generator is often used in a kitchen vehicle for steaming food or other purposes, and for the steam generator in the scene, a majority of used burners are fuel oil heaters which are directly sprayed, fuel oil spraying particles are large, and oil-gas mixing is uneven, so that ignition is difficult, combustion is unstable, combustion is incomplete, black smoke is emitted, the efficiency of the steam generator is low, the cooking environment is poor, and the atmospheric environment is polluted; in addition, because the volume of the directly-injected fuel oil heater is huge, the volume of the steam generator is high, the space of the kitchen truck is limited, and the too large volume of the steam generator compresses the limited space in the kitchen truck, thereby influencing the carrying of other articles and the operation comfort.
In view of the above, it is an urgent need to solve the problem to develop a steam generator that is easy to ignite, complete in combustion, free from black smoke, efficient, stable in operation and compact in structure; when the traditional steam generator is not used, only manual drainage can be performed, gravity drainage is performed, water still remains in the bottom of the boiler and in the pipeline, the water in the boiler is easy to deteriorate, and pollution is caused when the traditional steam generator is used again; residual water stored at the bottom of the furnace and in the pipeline can be frozen at low temperature, and the pipeline and components are easily frozen.
Disclosure of Invention
The invention aims to solve the defects of the steam generator, and provides the steam generator which is suitable for being used in a plurality of scenes with the altitude of 0-5000m, has compact structure, easy ignition, complete combustion, no black smoke, high efficiency and stable operation, can automatically control operation, automatically clean and automatically purge and empty, and can prevent pipelines and components from being frozen and prevent pollution caused by residual water storage.
A steam generator based on a rotary cup type fuel oil burner comprises a frame (1), a control system (2), a pipeline system (3), a gas-liquid separator (4), a rotary cup type fuel oil burner (5), a heating heat exchanger (6) and a purging system (7); the control system (2) comprises a power converter (201), a control main board (202), an operation display screen (203), an ambient temperature measuring module (204) and an ambient pressure measuring module (205); the pipeline system (3) comprises an acid washing unit (301), a water inlet pump (302), a circulating water pump (303) and an electromagnetic valve bank (304), wherein the electromagnetic valve bank (304) is a combination of a plurality of electromagnetic valves, and each electromagnetic valve is responsible for opening and closing different pipelines; the gas-liquid separator (4) comprises a separation tank (401), a steam pressure sensor (402), a steam temperature sensor (403) and a water level sensor (404); the rotary cup type fuel oil burner (5) preferably uses diesel oil as fuel, and can also use biological oil or kerosene as fuel; the heating heat exchanger (6) comprises a heat exchange unit (601), a closed heat-preservation shell (602) and a smoke outlet (603); the purging system (7) is provided with an air pressure pump (701).
The control system (2) operates according to the following steps:
s1: the control system (2) collects the pressure and the temperature of the position through an ambient temperature measuring module (204) and an ambient pressure measuring module (205);
s2: the control system (2) compares the pressure and the temperature acquired in the step S1 with built-in data to determine the altitude of the current position;
s3: the control system (2) extracts a corresponding control scheme according to the altitude of the position, and controls the oil-air ratio and the start-stop strategy of the rotary cup type fuel oil burner (5);
s4: the control system (2) collects the temperature, the pressure and the water level in the gas-liquid separator (4) through a steam pressure sensor (402), a steam temperature sensor (403) and a water level sensor (404);
s5: the control system (2) compares the pressure, the temperature and the water level acquired in the S4 with a control scheme, controls the start and stop of a corresponding water pump and the start and stop of an electromagnetic valve through operation, controls the firepower of the rotary cup type fuel oil burner (5), and coordinates the whole system to work so as to produce steam according to the set pressure, temperature and flow.
Collecting and controlling system information: in the control system (2), a control main board (202) is powered by a power converter (201), collects the pressure and the temperature of the position where the control main board is located through an ambient temperature measuring module (204) and an ambient pressure measuring module (205), receives the temperature, the pressure and the water level signals in a gas-liquid separator (4), and controls a rotary cup type fuel oil burner (5), a water inlet pump (302), a circulating water pump (303) and an electromagnetic valve bank (304) to do corresponding actions; the operation display screen (203) can display the running state of the system, and can receive external instructions to freely control the running of the system.
Preferably, the rotating cup type fuel oil burner (5) adopts diesel oil as fuel, the diesel oil has the characteristics of easy carrying, large combustion value, high ignition point and safety, and the diesel oil has incomparable advantages in the scenes of no electricity and frequent migration.
The rotary cup type fuel oil burner (5) can also adopt bio-oil or kerosene as fuel.
Steam generation: the control system (2) controls the water inlet pump (302) to pump water from the outside and supply the water to the heating heat exchanger (6), and simultaneously opens and closes the circulating water pump (303) and the corresponding electromagnetic valve, so that water circulates in the heating heat exchanger (6) and the gas-liquid separator (4); when the temperature, the pressure and the water level in the separating tank (401) are detected to be in set ranges, the rotating cup type fuel oil burner (5) is opened for heating, and steam under set pressure is generated; the control system (2) automatically adjusts the firepower of the rotary cup type fuel oil burner (5) to ensure the temperature and the flow of output steam; because the oil mass and the air quantity of the rotary cup type fuel oil burner (5) are adjustable, and the atomized fuel oil particles are small, the rotary cup type fuel oil burner can automatically optimize and adjust aiming at different combustion environments, so that the firepower is controllable, and the combustion is complete; in addition, a closed heat-insulating shell (602) is arranged on the outer side of the heat exchange unit (601) and is isolated from the outside, so that the influence of the outside environment on the combustor is prevented, the internal heat is prevented from being dissipated outwards, and the heat exchange efficiency is improved; when the burner is burning, air enters from the bottom of the burner, and the burnt flue gas is discharged from the smoke outlet (603) after being subjected to heat exchange by the heat exchange unit (601), so that the flue gas is prevented from being dissipated all around and polluting the working environment.
And (3) emptying and purging the system: when the outside air temperature is lower than 0 ℃ or the equipment is not used, the system can empty the water inside through the control of a manual operation display screen (203); the system starts all the electromagnetic valves first, and water in the system flows automatically through gravity and is discharged from the lowest end of the system; and then, opening and closing corresponding electromagnetic valves, opening an air pressure pump (701) in the system, inflating in a gas-liquid separator (4), and when the air pressure in the separation tank (401) reaches a set value, opening the corresponding electromagnetic valves, and purging residual water in the system by using the air pressure to enable each part of the system to be in a water-free state, so that components of the system are prevented from being frozen or polluted by accumulated water.
Acid washing of a system: after the system runs for a period of time, the inside of the system can be scaled due to water quality, and the system needs to be cleaned; filling pickling solution into the pickling unit (301), starting and stopping the corresponding electromagnetic valve and the corresponding water pump to enable the pickling solution to run in the whole system, removing scale in the system, and then opening the corresponding electromagnetic valve to discharge sewage; then, the control system (2) controls the corresponding electromagnetic valve and the corresponding water pump, clean water is added into the pipeline system and the two tank bodies, the clean water is enabled to run in the whole system, so that pickling solution in the system is cleaned and then discharged; repeating for 2-3 times to completely remove the pickling solution.
Compared with the prior art, the invention has the beneficial effects that:
the steam generator can efficiently generate steam at the altitude of 0-5000m, has compact structure, easy ignition, complete combustion, no black smoke emission, high efficiency and stable operation, can automatically control operation, automatically clean and automatically purge and empty, and can prevent pipelines and components from being frozen and pollution caused by residual water.
Drawings
FIG. 1 is an isometric view of the present invention;
FIG. 2 is an isometric view of the control system (2) of the present invention;
FIG. 3 is an isometric view of the invention with portions of the components hidden;
FIG. 4 is an isometric view of the invention from another perspective with portions of the components hidden;
FIG. 5 is a cross-sectional view of the rotary cup type fuel burner (5) of the present invention;
FIG. 6 is a cross-sectional view of the heating heat exchanger (6) of the present invention;
wherein: the device comprises a framework (1), a control system (2), a pipeline system (3), a gas-liquid separator (4), a rotary cup type fuel oil burner (5), a heating heat exchanger (6), a purging system (7), a power converter (201), a control main board (202), an operation display screen (203), an ambient temperature measuring module (204), an ambient pressure measuring module (205), an acid washing unit (301), a water inlet pump (302), a circulating water pump (303), an electromagnetic valve group (304), a separation tank (401), a steam pressure sensor (402), a steam temperature sensor (403), a water level sensor (404), a heat exchange unit (601), a sealed heat-insulating shell (602), a smoke vent (603) and an air pressure pump (701).
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in figure 1, the invention relates to a steam generator based on a rotary cup type fuel oil burner, which comprises a frame (1), a control system (2), a pipeline system (3), a gas-liquid separator (4), a rotary cup type fuel oil burner (5), a heating heat exchanger (6) and a purging system (7).
As shown in fig. 2, the control system (2) includes a power converter (201), a control motherboard (202), an operation display screen (203), an ambient temperature measurement module (204), and an ambient pressure measurement module (205).
As shown in fig. 3 and 4, the pipeline system (3) includes an acid washing unit (301), a water inlet pump (302), a water circulation pump (303), and an electromagnetic valve set (304), wherein the electromagnetic valve set (304) is a combination of several electromagnetic valves, and each electromagnetic valve is responsible for opening and closing different pipelines.
As shown in fig. 3 and 4, the gas-liquid separator (4) includes a separation tank (401), a steam pressure sensor (402), a steam temperature sensor (403), and a water level sensor (404).
As shown in fig. 5, the structure diagram of the rotary cup type fuel oil burner (5) is shown, preferably, the rotary cup type fuel oil burner (5) adopts diesel oil as fuel, the diesel oil has the characteristics of easy carrying, large combustion value, high ignition point and safety, and the diesel oil has incomparable advantages in the scenes of no electricity and frequent migration; the rotary cup type fuel oil burner (5) can also adopt bio-oil or kerosene as fuel.
As shown in fig. 6, the heating heat exchanger (6) includes a heat exchange unit (601), a closed heat-insulating housing (602), and a smoke outlet (603).
As shown in fig. 3, the purge system (7) is provided with an air pressure pump (701).
The control system (2) operates according to the following steps:
s1: the control system (2) collects the pressure and the temperature of the position through an ambient temperature measuring module (204) and an ambient pressure measuring module (205);
s2: the control system (2) compares the pressure and the temperature acquired in the step S1 with built-in data to determine the altitude of the current position;
s3: the control system (2) extracts a corresponding control scheme according to the altitude of the position, and controls the oil-air ratio and the start-stop strategy of the rotary cup type fuel oil burner (5);
s4: the control system (2) collects the temperature, the pressure and the water level in the gas-liquid separator (4) through a steam pressure sensor (402), a steam temperature sensor (403) and a water level sensor (404);
s5: the control system (2) compares the pressure, the temperature and the water level acquired in the S4 with a control scheme, controls the start and stop of a corresponding water pump and the start and stop of an electromagnetic valve through operation, controls the firepower of the rotary cup type fuel oil burner (5), and coordinates the whole system to work so as to produce steam according to the set pressure, temperature and flow.
Collecting and controlling system information: in the control system (2), a control main board (202) is powered by a power converter (201), collects the pressure and the temperature of the position where the control main board is located through an ambient temperature measuring module (204) and an ambient pressure measuring module (205), receives the temperature, the pressure and the water level signals in a gas-liquid separator (4), and controls a rotary cup type fuel oil burner (5), a water inlet pump (302), a circulating water pump (303) and an electromagnetic valve bank (304) to do corresponding actions; the operation display screen (203) can display the running state of the system, and can receive external instructions to freely control the running of the system.
Steam generation: the control system (2) controls the water inlet pump (302) to pump water from the outside and supply the water to the heating heat exchanger (6), and simultaneously opens and closes the circulating water pump (303) and the corresponding electromagnetic valve, so that water circulates in the heating heat exchanger (6) and the gas-liquid separator (4); when the temperature, the pressure and the water level in the separating tank (401) are detected to be in set ranges, the rotating cup type fuel oil burner (5) is opened for heating, and steam under set pressure is generated; the control system (2) automatically adjusts the firepower of the rotary cup type fuel oil burner (5) to ensure the temperature and the flow of output steam; because the oil mass and the air quantity of the rotary cup type fuel oil burner (5) are adjustable, and the atomized fuel oil particles are small, the rotary cup type fuel oil burner can automatically optimize and adjust aiming at different combustion environments, so that the firepower is controllable, and the combustion is complete; in addition, a closed heat-insulating shell (602) is arranged on the outer side of the heat exchange unit (601) and is isolated from the outside, so that the influence of the outside environment on the combustor is prevented, the internal heat is prevented from being dissipated outwards, and the heat exchange efficiency is improved; when the burner is burning, air enters from the bottom of the burner, and the burnt flue gas is discharged from the smoke outlet (603) after being subjected to heat exchange by the heat exchange unit (601), so that the flue gas is prevented from being dissipated all around and polluting the working environment.
And (3) emptying and purging the system: when the outside air temperature is lower than 0 ℃ or the equipment is not used, the system can empty the water inside through the control of a manual operation display screen (203); the system starts all the electromagnetic valves first, and water in the system flows automatically through gravity and is discharged from the lowest end of the system; and then, opening and closing corresponding electromagnetic valves, opening an air pressure pump (701) in the system, inflating in a gas-liquid separator (4), and when the air pressure in the separation tank (401) reaches a set value, opening the corresponding electromagnetic valves, and purging residual water in the system by using the air pressure to enable each part of the system to be in a water-free state, so that components of the system are prevented from being frozen or polluted by accumulated water.
Acid washing of a system: after the system runs for a period of time, the inside of the system can be scaled due to water quality, and the system needs to be cleaned; filling pickling solution into the pickling unit (301), starting and stopping the corresponding electromagnetic valve and the corresponding water pump to enable the pickling solution to run in the whole system, removing scale in the system, and then opening the corresponding electromagnetic valve to discharge sewage; then, the control system (2) controls the corresponding electromagnetic valve and the corresponding water pump, clean water is added into the pipeline system and the two tank bodies, the clean water is enabled to run in the whole system, so that pickling solution in the system is cleaned and then discharged; repeating for 2-3 times to completely remove the pickling solution.
The steam generator can efficiently generate steam at the altitude of 0-5000m, has compact structure, easy ignition, complete combustion, no black smoke emission, high efficiency and stable operation, can automatically control operation, automatically clean and automatically purge and empty, and can prevent pipelines and components from being frozen and pollution caused by residual water.
Claims (1)
1. A steam generator based on a rotary cup type fuel oil burner is characterized in that: the device comprises a frame (1), a control system (2), a pipeline system (3), a gas-liquid separator (4), a rotary cup type fuel oil burner (5), a heating heat exchanger (6) and a purging system (7); wherein the content of the first and second substances,
the pipeline system (3) comprises an acid washing unit (301), a water inlet pump (302), a circulating water pump (303) and an electromagnetic valve bank (304), wherein the electromagnetic valve bank (304) is a combination of a plurality of electromagnetic valves, and each electromagnetic valve is responsible for opening and closing different pipelines;
the gas-liquid separator (4) comprises a separation tank (401), a steam pressure sensor (402), a steam temperature sensor (403) and a water level sensor (404);
the rotary cup type fuel oil burner (5) is used as a heat source;
the heating heat exchanger (6) comprises a heat exchange unit (601), a closed heat-preservation shell (602) and a smoke outlet (603);
the control system (2) comprises a power converter (201), a control mainboard (202), an operation display screen (203), an ambient temperature measuring module (204) and an ambient pressure measuring module (205), wherein in the control system (2), the control mainboard (202) is powered by the power converter (201), the ambient temperature measuring module (204) and the ambient pressure measuring module (205) are used for collecting the pressure and the temperature of the position where the control mainboard is located, receiving the temperature, the pressure and the water level signals in the gas-liquid separator (4) and controlling the rotating cup type fuel oil burner (5), the water inlet pump (302), the circulating water pump (303) and the electromagnetic valve group (304) to do corresponding actions; the operation display screen (203) can display the running state of the system and can receive external instructions;
the control system (2) controls the water inlet pump (302) to pump water from the outside and supply the water to the heating heat exchanger (6), and simultaneously opens and closes the circulating water pump (303) and the corresponding electromagnetic valve, so that water circulates in the heating heat exchanger (6) and the gas-liquid separator (4); when the temperature, the pressure and the water level in the separating tank (401) are detected to be in set ranges, the rotating cup type fuel oil burner (5) is opened for heating, and steam under set pressure is generated; the control system (2) automatically adjusts the firepower of the rotary cup type fuel oil burner (5) to ensure the temperature and the flow of output steam;
a closed heat-insulating shell (602) is arranged on the outer side of the heat exchange unit (601) and is isolated from the outside;
when the burner is in combustion, air enters from the bottom of the burner, and the combusted flue gas is discharged from a smoke outlet (603) after being subjected to heat exchange by the heat exchange unit (601);
the purging system (7) is provided with an air pressure pump (701).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920150436.7U CN210921339U (en) | 2019-01-29 | 2019-01-29 | Steam generator based on rotary cup type fuel oil burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920150436.7U CN210921339U (en) | 2019-01-29 | 2019-01-29 | Steam generator based on rotary cup type fuel oil burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210921339U true CN210921339U (en) | 2020-07-03 |
Family
ID=71349128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920150436.7U Expired - Fee Related CN210921339U (en) | 2019-01-29 | 2019-01-29 | Steam generator based on rotary cup type fuel oil burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210921339U (en) |
-
2019
- 2019-01-29 CN CN201920150436.7U patent/CN210921339U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102022766A (en) | Calculus power low-carbon range hood | |
| CN210921339U (en) | Steam generator based on rotary cup type fuel oil burner | |
| CN201851258U (en) | Centrifugal liquid fuel oil heater | |
| CN101799154B (en) | High-power pulse combustion steam boiler with multi-combustor parallel heating | |
| CN103416264B (en) | Wind power and fuel complementary type greenhouse heating device and control method | |
| CN201743478U (en) | Energy-saving and environment-friendly auto-lifting noodle cooker | |
| CN113932210A (en) | Gas steam generator capable of recycling waste heat generated by efficient descaling | |
| CN208269200U (en) | Waste heat gas recycles cooking stove | |
| CN111706880A (en) | System for energy-conserving firewood kitchen and waste heat are used for indoor heating | |
| CN105482853A (en) | Biomass gasification furnace | |
| CN201228961Y (en) | Environment protection energy-conserving coal furnace | |
| CN215838372U (en) | Gas steam box with waste heat utilization function | |
| CN214064988U (en) | High smoke box boiler device | |
| CN205137404U (en) | Energy -efficient full -automatic gas vapor generation stove | |
| CN209371317U (en) | A kind of boiler softened water tank | |
| CN214841136U (en) | Methane energy heating water storage device | |
| CN220551892U (en) | Movable heat exchange device using multiple energy sources | |
| CN219674186U (en) | Self-adaptive instant heating type steam engine with adjustable steam volume for high plains | |
| CN200940882Y (en) | Device for prepn. of hot water by utilizing afterheat of down-sucking cooker hood | |
| CN216010890U (en) | Biomass combustion furnace capable of achieving sufficient combustion | |
| CN108266755A (en) | Automatically control the energy-saving cooking of air output | |
| CN201289103Y (en) | Multifunction coal -saving range | |
| CN216159101U (en) | Energy-saving vegetable oil stove | |
| CN209355482U (en) | A kind of less boiler with water inlet heat absorption function | |
| CN221098981U (en) | Small biomass hot water boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200703 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |