CN209084856U - A kind of smoke exhaust ventilator flue gas heating combined equipment - Google Patents
A kind of smoke exhaust ventilator flue gas heating combined equipment Download PDFInfo
- Publication number
- CN209084856U CN209084856U CN201821651572.6U CN201821651572U CN209084856U CN 209084856 U CN209084856 U CN 209084856U CN 201821651572 U CN201821651572 U CN 201821651572U CN 209084856 U CN209084856 U CN 209084856U
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- Prior art keywords
- oil
- flue gas
- pipe
- water inlet
- smoke exhaust
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- 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
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Abstract
The utility model discloses a kind of smoke exhaust ventilator flue gas heating combined equipments, oil strain mechanism and heating mechanism, connecting tube is equipped between oil strain mechanism and heating mechanism, oil strain mechanism includes air inlet pipe and inlet box, the inside of inlet box is equipped with oil baffle, heating mechanism includes heat exchange box and incubator, heat exchange box is equipped with flue gas case, water inlet pipe and water outlet, the two sides of flue gas case are equipped with escape pipe, escape pipe is connected with concetrated pipe, concetrated pipe is equipped with flue gas leading, escape pipe is connected with the first heat exchanger tube and the second heat exchanger tube, first heat exchanger tube and the second heat exchanger tube are respectively connected with bend pipe, water outlet is equipped with thermostat valve.The utility model solves in existing large kitchen, and high-temperature flue gas direct emission pollutes the environment, and water for kitchen use needs to carry out individually heating and uses, and leads to the problem of energy consumption.
Description
Technical field
The utility model is specifically related to a kind of smoke exhaust ventilator flue gas heating combined equipment.
Background technique
Smoke exhaust ventilator is also known as range hood, is a kind of kitchen appliance for purifying kitchen environment.It is mounted on kitchen range
Side can take rapidly the oil smoke being harmful to the human body generated in the waste and cooking process of cooking stove burning away, and discharge is outdoor, reduces
Pollution purifies air, and has gas defence, explosion-proof safety guarantee effect.
Oil smoke directly discharge to atmosphere after oil strain by traditional large size smoke exhaust ventilator, will lead to after long-term discharge
Friday air themperature rises, and especially in summer, certain adverse effect is caused to environment, water needs for kitchen use are individually added
Heat uses, and generates energy consumption.
Utility model content
The purpose of this utility model is that being directed to many deficiencies of the prior art, a kind of smoke exhaust ventilator flue gas heating dress is provided
It sets, solves in existing large kitchen, high-temperature flue gas direct emission pollutes the environment, and water for kitchen use needs to carry out
Individually heating uses, and leads to the problem of energy consumption.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution:
A kind of smoke exhaust ventilator flue gas heating combined equipment, it is characterised in that: oil strain mechanism and heating mechanism, oil strain mechanism and heating
Connecting tube is equipped between mechanism, oil strain mechanism includes air inlet pipe and inlet box, and air inlet pipe is connect with inlet box, the inside of inlet box
Equipped with oil baffle, oil baffle is shifted to install, and is uniformly provided with air hole on oil baffle, and the lower part of air hole is equipped with oil guide groove and recessed
Slot, oil guide groove and groove are connected with each other, and the bottom of inlet box is equipped with Oil Guide slope, and Oil Guide slope is equipped with oil trap, heating mechanism packet
Heat exchange box and incubator are included, heat exchange box is equipped with flue gas case, water inlet pipe and water outlet, and the two sides of flue gas case are equipped with escape pipe, out
Tracheae is connected with concetrated pipe, and concetrated pipe is equipped with flue gas leading, and escape pipe is connected with the first heat exchanger tube and the second heat exchanger tube, the first heat exchange
Pipe is respectively connected with bend pipe with the second heat exchanger tube, and bend pipe is connect with flue gas leading, and water outlet is equipped with thermostat valve, and water outlet and incubator connect
It connects.
Further, water inlet pipe is equipped with the first water inlet and the second water inlet, and the end of water inlet pipe is arranged in the first water inlet,
The two sides of water inlet pipe are arranged in second water inlet, and the second water inlet is uniformly arranged.By the first water inlet and the second water inlet come
Make uniform into water water inlet tube, so that cold water is uniformly distributed heat exchange box, save flooding time, accelerate water inlet efficiency.
Further, oil guide groove is connected with oil sump tank.Oil trap plays the role of water conservancy diversion, and the oil of filtering is accumulated in oil baffle
On, it is flowed by oil guide groove and groove to Oil Guide slope, the oil in Oil Guide slope enters oil trap, and having in oil trap is passed through collection
Fuel tank is collected, and continues to topple in union, is convenient for filters.
Further, the side of oil strain mechanism is equipped with flue-gas temperature detection device.Flue-gas temperature detection device plays flue gas temperature
The detection of degree can check whether the flue-gas temperature of entrance is relatively low when in use, ensure that cold water can reach 35 degree or more.
Further, the top of inlet box is equipped with mounting plate, and mounting plate is threadedly coupled with inlet box.Mounting plate is convenient for gear oil
The installation and cleaning of plate.
Further, mounting plate is uniformly provided with fixed plate, and fixed plate is connected with oil baffle, and oil guide plate and fixed plate screw thread connect
It connects.Fixed plate plays the role of fixed oil baffle, while being also convenient for installing and dismounting.
Further, liquid level tube is equipped between adjacent incubator.Liquid level tube plays the role of balance liquid level, prevents two guarantors
The liquid level difference of incubator influences amount of storage away from excessive.
Further, it is uniformly provided with a groove on Oil Guide slope, a groove plays the role of drainage, promotes oil quickly runner oil-collecting
In slot.
Further, it is equipped with switch in oil sump tank, plays effect oily in discharge oil sump tank.
A kind of smoke exhaust ventilator flue gas heating method, it is characterised in that include the following steps:
1) installation of device
A, installation is opened, oil baffle is threadedly coupled with fixed plate, fixed plate is staggered on a mounting board, fixed
Air hole is not connected between oil baffle afterwards, and the air hole of adjacent oil baffle is opposite with the plate body of another piece of oil baffle, staggeredly
It after setting, tightens, covers mounting plate；
2) flue gas oil strain
A, open smoke exhaust ventilator, flue gas be discharged by air inlet pipe by suction, flue gas enter after air inlet pipe be mounted on into
Oil baffle on tracheae stops, and flue gas is passed through from air hole, and the oil in flue gas sticks on oil baffle, around air hole
Oil guide groove is put aside and then flows downward, and continues to converge to groove along arc mechanism, enters back into next layer of oil guide groove and recessed
In slot, identical mode finally reaches the bottom of oil baffle；
B, the oil of oil baffle bottom is dropped on Oil Guide slope by the effect of gravity, is entered along the gradient of Oil Guide slope slope surface
Into oil trap, the gradient of slope surface is 30 °, and oil is flowed along the groove in slope surface, enters finally into oil sump tank discharge；
3) cold water heats
A, water inlet switch is opened, cold water is passed into water inlet pipe by water pipe, by the first water inlet and the second water inlet stream
Enter in heat exchange box, height of water level did not had oil sump tank and escape pipe, closed water inlet pipe, made to keep certain high with the water surface at the top of heat exchange box
Degree；
B, it is passed through the flue gas that oil strain is crossed, is entered in flue gas case by connecting tube, by the escape pipe in flue gas case by flue gas
Be transported in the first heat exchanger tube and the second heat exchanger tube, make water of the high-temperature flue gas stepless action in heat exchange box, the thermostat valve moment into
Row detection opens thermostat valve, hot water is flowed into water outlet, incubator is finally entered and is stored up after water temperature is higher than 35 degree
It deposits for use, the flue gas after cooling passes through flue gas leading and is discharged；
4) cleaning of inlet box
A, the switch in oil sump tank is opened, exclusively carries out collection with the cylinder of kitchen waste oil, later period concentration is handled；
B, mounting plate is opened, oil baffle is removed, and oil baffle and mounting plate are put into the high-temperature-hot-water of addition detergent
It is middle to impregnate 15 minutes, 2 operations are repeated, and the oil that stubbornness remains in oil guide groove and groove is cleaned using cleaning steel wire lump
Dirt reinstalls in inlet box after cleaning.
The utility model is by adopting the above-described technical solution, have the advantages that
1, the utility model utilizes the flue gas heat of pumping unit, enters air inlet pipe under the action of draft, passes through oil strain
Oil in kitchen ventilator is filtered by mechanism, is passed through hot gas, reduces the blocking of pipeline, and the hot gas of high temperature passes through heating device
Afterwards, with the Cold Water Exposure in heating dress, the exchange of heat is carried out, water temperature is increased, when water temperature reaches 35 degree or more, temperature control
Valve is opened, and hot water flows into incubator for use, is taken full advantage of high-temperature oil smoke, is filtered oil smoke, and hot water is added
Heat provides the demand of kitchen hot water, energy saving, and environmental protection.
2, oil baffle is staggered by the utility model, makes plate body phase of the air hole of adjacent oil baffle with another oil baffle
It is right, prevent air hole from uniformly arranging, flue gas reduces oil strain efficiency directly through air hole.
3, it in the utility model during cold water heating, keeps keeping certain height, water with the water surface at the top of heat exchange box
Face there was not escape pipe, reduced the water of heat under unit area, using a small amount of multiple, water was promoted quickly to heat, when needing
It is not in fall into a long wait when wanting urgent need.
4, the utility model is made uniform into water water inlet tube using the first water inlet and the second water inlet, can quickly make cold water
It is uniformly distributed heat exchange box, saves flooding time, accelerates water inlet efficiency.
5, the flue gas of high temperature is discharged by the first heat exchanger tube and the second heat exchanger tube by escape pipe, the first heat exchanger tube and second are changed
Heat pipe is evenly distributed in heat exchange box, can increase the contact area of high-temperature flue gas and cold water, promotes quickly heating.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawing:
Fig. 1 is a kind of structural schematic diagram of smoke exhaust ventilator flue gas heating combined equipment of the utility model；
Fig. 2 is the structural schematic diagram of oil baffle in the utility model；
Fig. 3 is the structural schematic diagram in Fig. 1 at A；
Fig. 4 is the structural schematic diagram in Fig. 1 at B；
Fig. 5 is the attachment structure schematic diagram of concetrated pipe and bend pipe in the utility model；
Fig. 6 is the attachment structure schematic diagram of oil baffle and fixed plate in the utility model.
In figure, 1- oil strain mechanism；2- heating mechanism；3- connecting tube；4- air inlet pipe；5- inlet box；6- oil baffle；7- is ventilative
Hole；8- oil guide groove；9- groove；10- Oil Guide slope；11- oil trap；12- heat exchange box；13- incubator；14- flue gas case；15- water inlet
Pipe；16- escape pipe；17- concetrated pipe；18- flue gas leading；19- oil sump tank；The first heat exchanger tube of 20-；The second heat exchanger tube of 21-；22- is curved
Pipe；The first water inlet of 23-；The second water inlet of 24-；25- flue-gas temperature detection device；26- fixed plate；27- mounting plate；28- liquid
Position pipe；29- thermostat valve；30- water outlet.
Specific embodiment
It as shown in Figures 1 to 6, is a kind of smoke exhaust ventilator flue gas heating combined equipment of the utility model, oil strain mechanism 1 and heater
Structure 2, is equipped with connecting tube 3 between oil strain mechanism 1 and heating mechanism 2, oil strain mechanism 1 includes air inlet pipe 4 and inlet box 5, air inlet pipe 4
It is connect with inlet box 5, the inside of inlet box 5 is equipped with oil baffle 6, and oil baffle 6 is shifted to install, is uniformly provided on oil baffle 6 ventilative
Hole 7, the lower part of air hole 7 are equipped with oil guide groove 8 and groove 9, and oil guide groove 8 and groove 9 are connected with each other, and the bottom of inlet box 5 is set
There is Oil Guide slope 10, Oil Guide slope 10 is equipped with oil trap 11, and heating mechanism 2 includes heat exchange box 12 and incubator 13, and heat exchange box 12 is equipped with
Flue gas case 14, water inlet pipe 15 and water outlet 30, the two sides of flue gas case 14 are equipped with escape pipe 16, and escape pipe 16 is connected with concetrated pipe
17, concetrated pipe 17 is equipped with flue gas leading 18, and escape pipe 16 is connected with the first heat exchanger tube 20 and the second heat exchanger tube 21, the first heat exchanger tube 20
It is respectively connected with bend pipe 22 with the second heat exchanger tube 21, bend pipe 22 is connect with flue gas leading 18, and water outlet 30 is equipped with thermostat valve 29, water outlet
30 connect with incubator 13.
Water inlet pipe 15 is equipped with the first water inlet 23 and the second water inlet 24 in the utility model, and the setting of the first water inlet 23 exists
The two sides of water inlet pipe 15 are arranged in the end of water inlet pipe 15, the second water inlet 24, and the second water inlet 24 is uniformly arranged.Pass through first
Water inlet 23 and the second water inlet 24 make water inlet pipe 15 intake uniformly, so that cold water is uniformly distributed heat exchange box 12, save
About flooding time accelerates water inlet efficiency.Oil guide groove 8 is connected with oil sump tank 19.Oil trap 11 plays the role of water conservancy diversion, filtering
Oil is accumulated on oil baffle 6, is flowed by oil guide groove 8 and groove 9 to Oil Guide slope 10, the oil in Oil Guide slope 10 enters oil trap
11, and having in oil trap 11 is collected by oil sump tank 19, continue to topple in union, is convenient for filters.Oil filter
The side of structure is equipped with flue-gas temperature detection device 25.Flue-gas temperature detection device 25 plays the detection of flue-gas temperature, when in use,
Can check whether the flue-gas temperature of entrance is relatively low, ensure that cold water can reach 35 degree or more.The top of inlet box 5 is equipped with installation
Plate 27, mounting plate 27 are threadedly coupled with inlet box 5.Mounting plate 27 is convenient for the installation and cleaning to oil baffle 6.Mounting plate 27 is uniform
Equipped with fixed plate 26, fixed plate 26 is connected with oil baffle 6, and oil guide plate is threadedly coupled with fixed plate 26.Fixed plate 26 plays fixation
The effect of oil baffle 6, while being also convenient for installing and dismounting.Liquid level tube 28 is equipped between adjacent incubator 13.Liquid level tube 28 plays
The effect of balance liquid level prevents the liquid level difference of two incubators 13 from influencing amount of storage away from excessive.Item is uniformly provided on Oil Guide slope 10
Groove, a groove play the role of drainage, promote in the quick runner oil trap 11 of oil.It is equipped with switch in oil sump tank 19, plays
Effect oily in oil sump tank 19 is discharged.
A kind of smoke exhaust ventilator flue gas heating method, includes the following steps:
1) installation of device
A, installation is opened, oil baffle 6 is threadedly coupled with fixed plate 26, fixed plate 26 is staggeredly set on mounting plate 27
It sets, air hole 7 is not connected between the oil baffle 6 after fixing, the air hole 7 of adjacent oil baffle 6 and the plate of another piece of oil baffle 6
Body is opposite, after being staggered, tightens, and covers mounting plate 27；
2) flue gas oil strain
A, smoke exhaust ventilator is opened, flue gas is discharged by air inlet pipe 4 by suction, flue gas is mounted on after entering air inlet pipe 4
Oil baffle 6 in air inlet pipe 4 stops, and flue gas is passed through from air hole 7, and the oil in flue gas sticks on oil baffle 6, passes through air hole
It the savings of oil guide groove 8 around 7 and then flows downward, along arc mechanism continues to converge to groove 9, enter back into next layer and lead
In oil groove 8 and groove 9, identical mode finally reaches the bottom of oil baffle 6；
B, the oil of 6 bottom of oil baffle is dropped on Oil Guide slope 10 by the effect of gravity, along the oblique of 10 slope surface of Oil Guide slope
Degree enters in oil trap 11, and the gradient of slope surface is 30 °, and oil is flowed along the groove in slope surface, enters finally into oil sump tank
19 discharges；
3) cold water heats
A, water inlet switch is opened, cold water is passed into water inlet pipe 15 by water pipe, by the first water inlet 23 and the second water inlet
Mouth 24 flows into heat exchange box 12, and height of water level did not had oil sump tank 19 and escape pipe 16, closes water inlet pipe 15, makes 12 top of heat exchange box
It keeps certain height with the water surface；
B, it is passed through the flue gas that oil strain is crossed, is entered in flue gas case 14 by connecting tube 3, by the escape pipe 16 in flue gas case 14
Flue gas is transported in the first heat exchanger tube 20 and the second heat exchanger tube 21, water of the high-temperature flue gas stepless action in heat exchange box 12 is made,
29 moment of thermostat valve is detected, and after water temperature is higher than 35 degree, opens thermostat valve 29, hot water is flowed into water outlet 30, most
Enter incubator 13 afterwards store for use, the flue gas after cooling is discharged by flue gas leading 18；
4) cleaning of inlet box
A, the switch in oil sump tank 19 is opened, exclusively carries out collection with the cylinder of kitchen waste oil, later period concentration is handled；
B, mounting plate 27 is opened, oil baffle 6 is removed, and oil baffle 6 and mounting plate 27 are put into the height of addition detergent
It is impregnated 15 minutes in warm water, 2 operations is repeated, and stubbornness is cleaned using cleaning steel wire lump and remains in oil guide groove 8 and recessed
Greasy dirt on slot 9 reinstalls in inlet box 5 after cleaning.
1, the utility model utilizes the flue gas heat of pumping unit, and air inlet pipe 4 is entered under the action of draft, passes through oil strain
Oil in kitchen ventilator is filtered by mechanism, is passed through hot gas, reduces the blocking of pipeline, and the hot gas of high temperature passes through heating device
Afterwards, with the Cold Water Exposure in heating dress, the exchange of heat is carried out, water temperature is increased, when water temperature reaches 35 degree or more, temperature control
Valve 29 is opened, and hot water flows into stand-by in incubator 13, is taken full advantage of high-temperature oil smoke, is filtered oil smoke, and by hot water into
Row heating, provides the demand of kitchen hot water, energy saving, and environmental protection.
2, oil baffle 6 is staggered by the utility model, makes the air hole 7 of adjacent oil baffle 6 and the plate of another oil baffle 6
Body is opposite, prevents air hole 7 from uniformly arranging, and flue gas reduces oil strain efficiency directly through air hole 7.
3, in the utility model during cold water heating, 12 top of heat exchange box is kept to keep certain height with the water surface,
The water surface did not had an escape pipe 16, reduced the water of heat under unit area, using a small amount of multiple, water was promoted quickly to heat,
It is not in fall into a long wait when needing urgent need.
4, the utility model makes water inlet pipe 15 intake uniformly using the first water inlet 23 and the second water inlet 24, can be quickly
So that cold water is uniformly distributed heat exchange box 12, save flooding time, accelerates water inlet efficiency.
5, the flue gas of high temperature is discharged by the first heat exchanger tube 20 and the second heat exchanger tube 21, the first heat exchanger tube 20 by escape pipe 16
It is evenly distributed in heat exchange box 12 with the second heat exchanger tube 21, the contact area of high-temperature flue gas and cold water can be increased, promoted quick
Heating.
The above are only specific embodiments of the present invention, but the technical characteristics of the utility model is not limited thereto.Appoint
How based on the utility model, to solve essentially identical technical problem, essentially identical technical effect is realized, it is made
Simple change, equivalent replacement or modification etc., are all covered by among the protection scope of the utility model.
Claims (9)
1. a kind of smoke exhaust ventilator flue gas heating combined equipment, it is characterised in that: oil strain mechanism and heating mechanism, the oil strain mechanism and institute
It states and is equipped with connecting tube between heating mechanism, the oil strain mechanism includes air inlet pipe and inlet box, the air inlet pipe and the oil strain
The inside of case connection, the inlet box is equipped with oil baffle, and the oil baffle is shifted to install, is uniformly provided on the oil baffle ventilative
Hole, the lower part of the air hole are equipped with oil guide groove and groove, and the oil guide groove and the groove are connected with each other, the inlet box
Bottom is equipped with Oil Guide slope, and the Oil Guide slope is equipped with oil trap, and the heating mechanism includes heat exchange box and incubator, the heat exchange box
Equipped with flue gas case, water inlet pipe and water outlet, the two sides of the flue gas case are equipped with escape pipe, and the escape pipe is connected with set
Pipe, the concetrated pipe are equipped with flue gas leading, and the escape pipe is connected with the first heat exchanger tube and the second heat exchanger tube, first heat exchanger tube
Be respectively connected with bend pipe with second heat exchanger tube, the bend pipe is connect with flue gas leading, the water outlet be equipped with thermostat valve, it is described go out
The mouth of a river is connect with the incubator.
2. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 1, it is characterised in that: the water inlet pipe is equipped with the
The end of the water inlet pipe, the second water inlet setting is arranged in one water inlet and the second water inlet, first water inlet
In the two sides of the water inlet pipe, second water inlet is uniformly arranged.
3. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 1, it is characterised in that: the oil guide groove is connected with
Oil sump tank.
4. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 1, it is characterised in that: the side of the oil strain mechanism
Face is equipped with flue-gas temperature detection device.
5. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 1, it is characterised in that: the top of the inlet box
Equipped with mounting plate, the mounting plate is threadedly coupled with the inlet box.
6. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 5, it is characterised in that: the mounting plate is uniformly set
There is fixed plate, the fixed plate is connected with the oil baffle, and the oil guide plate is threadedly coupled with the fixed plate.
7. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 1, it is characterised in that: the adjacent incubator it
Between be equipped with liquid level tube.
8. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 1, it is characterised in that: on the Oil Guide slope uniformly
Equipped with a groove.
9. a kind of smoke exhaust ventilator flue gas heating combined equipment according to claim 1, it is characterised in that: be equipped with and open in oil sump tank
It closes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821651572.6U CN209084856U (en) | 2018-10-11 | 2018-10-11 | A kind of smoke exhaust ventilator flue gas heating combined equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821651572.6U CN209084856U (en) | 2018-10-11 | 2018-10-11 | A kind of smoke exhaust ventilator flue gas heating combined equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209084856U true CN209084856U (en) | 2019-07-09 |
Family
ID=67118953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821651572.6U Expired - Fee Related CN209084856U (en) | 2018-10-11 | 2018-10-11 | A kind of smoke exhaust ventilator flue gas heating combined equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209084856U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109140558A (en) * | 2018-10-11 | 2019-01-04 | 浙江建设职业技术学院 | A kind of smoke exhaust ventilator flue gas heating combined equipment and method |
-
2018
- 2018-10-11 CN CN201821651572.6U patent/CN209084856U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109140558A (en) * | 2018-10-11 | 2019-01-04 | 浙江建设职业技术学院 | A kind of smoke exhaust ventilator flue gas heating combined equipment and method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190709 Termination date: 20201011 |