CN2800110Y - Combined heat-storage heating stove - Google Patents
Combined heat-storage heating stove Download PDFInfo
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- CN2800110Y CN2800110Y CN 200520090992 CN200520090992U CN2800110Y CN 2800110 Y CN2800110 Y CN 2800110Y CN 200520090992 CN200520090992 CN 200520090992 CN 200520090992 U CN200520090992 U CN 200520090992U CN 2800110 Y CN2800110 Y CN 2800110Y
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- gas
- water
- heat exchanger
- flue
- heat
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Abstract
The utility model belongs to the field of an energy-saving stove, particularly a combined heat-storage heating stove which comprises a stove table, a combustor, a combustion fan, an oil fume extractor, a condensation purifier, an upper water pipe, a lower water pipe and a controller of the stove. The utility model is characterized in that the combustor is provided with a heat accumulation cover, a pipe head of a fume outlet is provided with a fume transfer valve, and a gas-gas heat exchanger and a gas-water heat exchanger are arranged in a total heat exchange flue; a water level controller of a floating ball and a hot water pipe bundle are arranged in a heat storage water tank, and the inner part and the outer part of a pipeline is circulated by hot water; the top part of the oil fume extractor is provided with a balanced fume extractor for discharging waste gas and introducing fresh wind, and the front part is provided with a fresh wind transfer valve and a wind curtain forming device. The combined heat-storage heating stove is formed by the combination of a plurality of heat exchangers so as to combine the supply of hot water and heating, and has the advantages of reasonable design, compact structure, high heat efficiency of gas, full utilization for heat energy produced by the stove and environmental improvement.
Description
Technical field
The utility model belongs to the energy-saving cooking field, and particularly a kind of combined heat storage and heating stove is suitable for large kitchens such as restaurant, dining room and uses.
Background technology
Present household electrical appliance that generally use such as gas-cooker, lampblack absorber, electric heater etc., these all are the products of function singleness, use is restricted, and there are a large amount of energy wastes, gas-cooker particularly, it comes cooking food by the combustion-supporting heating of room air, to the burn waste gas that produces, oil smoke, aqueous vapor that the cooking produces of lampblack absorber is outdoor by discharging behind the simple oil strain of oil cleaner screen, cause a large amount of waste heat wastes, and because burning produces a large amount of waste heats, temperature in the kitchen is raise, and air quality worsens, and influences healthy.Electric heater then need consume a large amount of electric energy with the cold water heating, and a large amount of use meetings bring very big pressure to electrical network.Therefore people are seeking a kind of method, and the energy recovery of wasting is used, and reach energy saving purposes.
Application for a patent for invention 2004100561549 " cooking stove hot water tank " discloses a kind of kitchen range of cabinet type structure, comprise induced-draft fan, reservoir, condenser, cooking stove is the combustion chamber that is surrounded by special-shaped cooling tube, by the fire tube bundle combustion chamber wind channel is connected, form the heat exchange loop by looping back water pipe, cooling tube, thermal convection current pipe, electric heat water tank, gas-cooker and electric heater are combined as a whole, easy to use, can reduce production costs.But still have the some shortcomings part.
Summary of the invention
The purpose of this utility model provides and a kind ofly can make full use of the combined heat storage and heating stove that the heat that produced in the gas-cooker combustion process is used as heating, hot water both can be provided, be used for heating, can improve kitchen environment again.
According to combined heat storage and heating stove of the present utility model, comprise the kitchen range top, be contained in burner on this kitchen range top and control valve, combustion fan and adjusting valve thereof, gas pipeline, lampblack absorber, storage tank, heat storage water tank, tube connector, condensation cleaning heat exchanger, upper hose, upper hose safety non-return valve, downcomer, it is characterized in that:
1) around described burner, be provided with a heat gathering cover, be provided with a water jacket in the kitchen range shell, form flue gas between this water jacket and the heat gathering cover and introduce the chamber,
2) described kitchen range shell downside is provided with exhaust opening and is connected with total heat exchange flue,
3) be provided with a balance induced-draft fan at described lampblack absorber top, be provided with in the casing of this balance induced-draft fan by the smoke evacuation wind drum and the new wind of same driven by motor and introduce drum, with dividing plate casing is separated into smoke evacuation chamber and new air compartment, top, smoke evacuation chamber is provided with exhaust opening, the lower end connects total heat exchange flue, new air compartment top is provided with fresh inlet, new air compartment lower end is connected with the new wind distributor chamber of last gas-to-gas heat exchanger, one side of new wind distributor chamber is connected with new wind transfer valve by fresh wind tube, the last gas-to-gas heat exchanger of opposite side in total heat exchange flue is connected with fresh wind tube road another inlet with new wind transfer valve, the fresh wind tube road is through tube connector, following gas-to-gas heat exchanger, combustion-supporting airduct is connected with combustion fan
4) hot water outlet pipe of described heat storage water tank is provided with water circulating pump, be connected with return pipe by a circulating valve, the return pipe air-water heat exchanger interior with being located at total heat exchange flue is connected, this air-water heat exchanger is connected with water jacket, water jacket is connected with the heat storage water tank top, form the inner closed loop of heat energy storage, hot water outlet pipe, return pipe are connected with outside heating equipment, form outside closed circuit.
Be provided with the tube bank of ball float water level controller and hot water in the described heat storage water tank, the inlet of this hot water tube bank is connected with storage tank through tube connector, and the outlet and the hot-water line of hot water tube bank join, and also are provided with pressure spilling water valve on the heat storage water tank and link to each other with downcomer.
The underflue of described total heat exchange flue is divided into the flue of establishing the air-water heat exchanger in the flue of a gas-to-gas heat exchanger and one, described exhaust opening is provided with a flue gas transfer valve with total heat exchange flue junction, two outlets of this flue gas transfer valve respectively with the flue of gas-to-gas heat exchanger with in establish the air-water heat exchanger flue be connected, the flue of air-water heat exchanger and gas-to-gas heat exchanger flue compile in the interior pipe in into new wind and smoke road, the interior pipe upper end in new wind and smoke road links to each other with last gas-to-gas heat exchanger, the outer tube upper end in this new wind and smoke road links to each other with the fresh wind tube of last gas-to-gas heat exchanger both sides, and the lower end links to each other with tube connector.
There is an air curtain distributor chamber to be connected with described new wind transfer valve, the front panel of this air curtain distributor chamber has air curtain and forms outlet, junction at new wind transfer valve and air curtain distributor chamber is provided with the cold water comb, the water filling port of this cold water comb is connected with upper hose, has between cold water comb and the storage tank, water inlet is connected.
The waste gas of described lampblack absorber bottom converges the condensation cleaning heat exchanger is set in the chamber, and this condensation cleaning heat exchanger inserts storage tank middle part, and waste gas converges the chamber and communicates with total heat exchange flue top.
Air-water heat exchanger flue is provided with openable base plate at kitchen range top middle part, at the base plate downside heating auxiliary burner is set, and its auxiliary combustion fan connects auxiliary combustion-supporting airduct through the auxiliary Electric air valve of new wind, and gas electromagnetic valve is connected with auxiliary burner.
The front panel of described lampblack absorber is provided with controller, wherein be provided with the control button of balance induced-draft fan, new wind transfer valve and illuminating lamp, be provided with the cooking stove controller on the described kitchen range top, the control button and the water temperature that wherein are provided with water circulating pump, flue gas transfer valve, auxiliary heating gas electromagnetic valve and auxiliary Electric air valve thereof and igniting are automatically set and display.
Described water jacket adopts the spirally coiled water jacket, and described heat gathering cover is the bottom of a pan shape cover, and described air-water heat exchanger is bundled tube or blade heat exchanger.
According to heat storage and heating stove of the present utility model, be sitting on the kitchen range at the bottom of the kitchen range during use, the flue gas that burner produces enters flue gas introducing chamber and enters total heat exchange flue through exhaust opening, through entering new wind and smoke road after gas-to-gas heat exchanger or the heat exchange of the air-water heat exchanger cooling down, behind last gas-to-gas heat exchanger, flue gas is discharged from exhaust opening again by smoke evacuation wind drum.
New wind divides two-way after fresh wind port is introduced new air compartment, the one tunnel enters new wind and smoke road through last gas-to-gas heat exchanger by adapter, enters down gas-to-gas heat exchanger through new wind tube connector again, delivers to combustion fan through combustion-supporting airduct.Another road is through fresh wind tube, and new wind transfer valve is to the air curtain distributor chamber, and discharges the formation air curtain from its outlet.
The oil smoke that is produced by kitchen range on the kitchen range top, steam is compiled by the waste gas chamber of compiling, and enters total heat exchange flue after the cooling of condensation cleaning heat exchanger, is discharged by smoke evacuation wind drum.
Upper hose enters heat storage water tank through being located at new wind transfer valve and air curtain distributor chamber junction has the cold water comb to enter storage tank by tube connector, by inner closed loop, outside closed circuit circulate heating and heat accumulation, realizes the purpose of this utility model.
The utility model combines a plurality of heat exchangers, and gas-cooker, lampblack absorber, heat storage water tank are combined, and utilizes balance induced-draft fan discharge flue gas and for burner provides new wind, has both saved the energy, has improved working environment again.
According to the utility model, the heat that is produced by burner is used for the cooking, and flue gas carries out the temperature that heat exchange can improve combustion air by the gas-to-gas heat exchanger in heat exchange flue and the heat exchange flue, thereby improves the thermal efficiency; Carry out heat exchange with the air-water heat exchanger in the heat exchange flue, heat energy storage is sent in the heat storage water tank in the water heating.From the heat that distributes more than the kitchen range top face, be included in the high-temperature oil smoke, the aqueous vapor that produce in the gastronomical process, through the condensing heat exchanger cooling, oil, air cooling are coagulated, and heat is used for heating the water of storage tank, delivers in the tube bank of heat storage water tank, the heating of hot water in heat storage water tank is used to provide hot water.Circulation waterway can make hot water realize inner loop and outer loop, accomplishes to save energy and reduce the cost.
The air curtain apparatus set according to the utility model can produce air curtain, and hot flue gas, deep fat, aqueous vapor and kitchen that cooking stove is produced keep apart, and improve working environment.
Owing to adopted the balance induced-draft fan, make the waste gas of discharge and send into indoor fresh air to reach balance, help improving the completing combustion rate and improve indoor air environment.
Owing to adopted the assisted gas heater, suspended at cooking stove and can continue to heat heating water, temperature stabilization in the holding chamber when using.
Owing to designed two cover control device, made its operation and use very convenient.
Description of drawings
Fig. 1 is a perspective view of the present utility model, there is shown twin furnace kitchen range structure.
Fig. 2 is the partial sectional view of facing of Fig. 1.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present utility model.
As shown in Figure 1 and Figure 2, combined heat storage and heating stove of the present utility model, comprise the kitchen range top 35, be contained in burner 6 on this kitchen range top 35 and control valve 33, combustion fan 4 and adjusting valve 5 thereof, gas pipeline 40, lampblack absorber 23, storage tank 21, heat storage water tank 1, tube connector 12, condensation cleaning heat exchanger 14, upper hose 46, upper hose safety non-return valve 47, downcomer 39, it is characterized in that:
1) around described burner 6, be provided with a heat gathering cover 31, be provided with a water jacket 7 in kitchen range 30 shells, form flue gas between this water jacket 7 and the heat gathering cover 31 and introduce the chamber,
2) described kitchen range 30 shell downsides are provided with exhaust opening 32 and are connected with total heat exchange flue 13,
3) be provided with a balance induced-draft fan 18 at described lampblack absorber 23 tops, be provided with the smoke evacuation wind drum 49 and the new wind that drive by same motor 51 in the casing of this balance induced-draft fan 18 and introduce drum 52, with dividing plate 50 casing is separated into smoke evacuation chamber 19 and new air compartment 20, smoke evacuation 19 tops, chamber are provided with exhaust opening, the lower end connects total heat exchange flue 13, new air compartment 20 tops are provided with fresh inlet, new air compartment 20 lower ends are connected with last gas-to-gas heat exchanger 17 new wind distributor chambers 53, one side of new wind distributor chamber 53 is connected with new wind transfer valve 29 by fresh wind tube 28, the last gas-to-gas heat exchanger 17 of opposite side in total heat exchange flue 13 is connected with fresh wind tube road 16 another inlet with new wind transfer valve 29, fresh wind tube road 16 is through tube connector 9, following gas-to-gas heat exchanger 8, combustion-supporting airduct 59 is connected with combustion fan 4
4) hot water outlet pipe 44 of described heat storage water tank 1 is provided with water circulating pump 41, be connected with return pipe 42 by a circulating valve 43, return pipe 42 is connected with air-water heat exchanger 10 in being located at total heat exchange flue 13, this air-water heat exchanger 10 is connected with water jacket 7, water jacket 7 is connected with heat storage water tank 1 top, form the inner closed loop of heat energy storage, hot water outlet pipe 44, return pipe 42 are connected with outside heating equipment, form outside closed circuit.
As shown in Figure 1, be provided with ball float water level controller 3 and hot water tube bank 2 in the described heat storage water tank 1, the inlet of this hot water tube bank 2 is connected with storage tank 21 through tube connector 12, and the outlet and the hot-water line 45 of hot water tube bank 2 join, and heat storage water tank 1 also is provided with pressure spilling water valve 38 and links to each other with downcomer 39.
As shown in Figure 2, described combined heat storage and heating stove, its feature is established the flue 37 of air-water heat exchanger 10 in the underflue of described total heat exchange flue 13 is divided into the flue of a gas-to-gas heat exchanger 8 and one, described exhaust opening 32 is provided with a flue gas transfer valve 55 with total heat exchange flue 13 junctions, two outlets of this flue gas transfer valve 55 respectively with the flue of gas-to-gas heat exchanger 8 with in establish air-water heat exchanger 10 flue 37 be connected, the flue 37 of air-water heat exchanger and gas-to-gas heat exchanger flue compile in the interior pipe in into new wind and smoke road 11, the interior pipe upper end in new wind and smoke road 11 links to each other with last gas-to-gas heat exchanger 17, the outer tube upper end in this new wind and smoke road 11 links to each other with the fresh wind tube 16 of last gas-to-gas heat exchanger 17 both sides, and the lower end links to each other with tube connector 9.
There is an air curtain distributor chamber 26 to be connected with described new wind transfer valve 29, the front panel of this air curtain distributor chamber 26 has air curtain and forms outlet 27, junction at new wind transfer valve 29 and air curtain distributor chamber 26 is provided with cold water comb 25, the water filling port of this cold water comb 25 is connected with upper hose 46, has between cold water comb 25 and the storage tank 21, water inlet is connected.
The waste gas of described lampblack absorber 23 bottoms converges condensation cleaning heat exchanger 14 is set in the chamber 15, and this condensation cleaning heat exchanger 14 inserts storage tanks 21 middle parts, and waste gas converges chamber 15 and communicates with total heat exchange flue 13 tops.
Be provided with openable base plate at kitchen range top middle part air-water heat exchanger flue 37, at the base plate downside heating auxiliary burner 57 is set, its auxiliary combustion fan 54 connects auxiliary combustion-supporting airduct 59 through the auxiliary Electric air valve 56 of new wind, and gas electromagnetic valve 58 is connected with auxiliary burner 57.
The front panel of described lampblack absorber 23 is provided with controller 24, wherein be provided with the control button of balance induced-draft fan 18, new wind transfer valve 29 and illuminating lamp, be provided with cooking stove controller 36 on the described kitchen range top 35, the control button and the water temperature that wherein are provided with water circulating pump 41, flue gas transfer valve 55, auxiliary heating gas electromagnetic valve 58 and auxiliary Electric air valve 56 and igniting are automatically set and display.
Described water jacket 7 adopts the spirally coiled water jacket, and described heat gathering cover 31 is the bottom of a pan shape cover, and described air-water heat exchanger 10 is bundled tube or blade heat exchanger.
Label 34 among the figure is a peep hole, and 22 is shutter.Kitchen range top is provided with the situation of two kitchen ranges among the figure, and burner and relevant device thereof all are two covers.The heat exchanger that is adopted is by two distributor chambers, one group of bundled tube or sheet pipe, and two are compiled the chamber and form, distributor chamber is inlet, and the chamber of compiling is outlet, and heat transferring medium enters bundled tube or sheet flat tube through distributor chamber, after tube wall carries out heat exchange, be pooled to again to compile in the chamber and discharge.
Claims (8)
1, a kind of combined heat storage and heating stove, comprise the kitchen range top (35), be contained in burner (6) on this kitchen range top (35) and control valve (33), combustion fan (4) and adjusting valve (5) thereof, gas pipeline (40), lampblack absorber (23), storage tank (21), heat storage water tank (1), tube connector (12), condensation cleaning heat exchanger (14), upper hose (46), upper hose safety non-return valve (47), downcomer (39), it is characterized in that:
1) be provided with a heat gathering cover (31) on every side at described burner (6), be provided with a water jacket (7) in kitchen range (30) shell, form flue gas between this water jacket (7) and the heat gathering cover (31) and introduce the chamber,
2) described kitchen range (30) shell downside is provided with exhaust opening (32) and is connected with total heat exchange flue (13),
3) be provided with a balance induced-draft fan (18) at described lampblack absorber (23) top, be provided with the smoke evacuation wind drum (49) and the new wind that drive by same motor (51) in the casing of this balance induced-draft fan (18) and introduce drum (52), with dividing plate (50) casing is separated into smoke evacuation chamber (19) and new air compartment (20), top, smoke evacuation chamber (19) is provided with exhaust opening, the lower end connects total heat exchange flue (13), new air compartment (20) top is provided with fresh inlet, new air compartment (20) lower end is connected with the new wind distributor chamber (53) of last gas-to-gas heat exchanger (17), one side of new wind distributor chamber (53) is connected with new wind transfer valve (29) by fresh wind tube (28), the last gas-to-gas heat exchanger (17) of opposite side in total heat exchange flue (13) is connected with fresh wind tube road (16) another inlet with new wind transfer valve (29), fresh wind tube road (16) is through tube connector (9), following gas-to-gas heat exchanger (8), combustion-supporting airduct (59) is connected with combustion fan (4)
4) hot water outlet pipe (44) of described heat storage water tank (1) is provided with water circulating pump (41), be connected with return pipe (42) by a circulating valve (43), return pipe (42) the air-water heat exchanger (10) interior with being located at total heat exchange flue (13) is connected, this air-water heat exchanger (10) is connected with water jacket (7), water jacket (7) is connected with heat storage water tank (1) top, form the inner closed loop of heat energy storage, hot water outlet pipe (44), return pipe (42) are connected with outside heating equipment, form outside closed circuit.
2, combined heat storage and heating stove according to claim 1, its feature is provided with ball float water level controller (3) and hot water tube bank (2) in described heat storage water tank (1), the inlet of this hot water tube bank (2) is connected with storage tank (21) through tube connector (12), the outlet and the hot-water line (45) of hot water tube bank (2) join, and also are provided with pressure spilling water valve (38) on the heat storage water tank (1) and link to each other with downcomer (39).
3, combined heat storage and heating stove according to claim 1, its feature is established the flue (37) of air-water heat exchanger (10) in the underflue of described total heat exchange flue (13) is divided into the flue of a gas-to-gas heat exchanger (8) and one, described exhaust opening (32) is provided with a flue gas transfer valve (55) with total heat exchange flue (13) junction, two outlets of this flue gas transfer valve (55) respectively with the flue of gas-to-gas heat exchanger (8) with in establish air-water heat exchanger (10) flue (37) be connected, flue of air-water heat exchanger (37) and gas-to-gas heat exchanger flue compile in the interior pipe in into new wind and smoke road (11), the interior pipe upper end in new wind and smoke road (11) links to each other with last gas-to-gas heat exchanger (17), the outer tube upper end in this new wind and smoke road (11) links to each other with the fresh wind tube (16) of last gas-to-gas heat exchanger (17) both sides, and the lower end links to each other with tube connector (9).
4, combined heat storage and heating stove according to claim 1, its feature is in there being an air curtain distributor chamber (26) to be connected with described new wind transfer valve (29), the front panel of this air curtain distributor chamber (26) has air curtain and forms outlet (27), junction at new wind transfer valve (29) and air curtain distributor chamber (26) is provided with cold water comb (25), the water filling port of this cold water comb (25) is connected with upper hose (46), has between cold water comb (25) and the storage tank (21), water inlet is connected.
5, combined heat storage and heating stove according to claim 1, the waste gas that it is characterized in that described lampblack absorber (23) bottom converges condensation cleaning heat exchanger (14) is set in the chamber (15), this condensation cleaning heat exchanger (14) inserts storage tank (21) middle part, and waste gas converges chamber (15) and communicates with total heat exchange flue (13) top.
6, combined heat storage and heating stove according to claim 1, it is characterized in that being provided with openable base plate at kitchen range top middle part air-water heat exchanger flue (37), at the base plate downside heating auxiliary burner (57) is set, its auxiliary combustion fan (54) connects auxiliary combustion-supporting airduct (59) through the auxiliary Electric air valve (56) of new wind, and gas electromagnetic valve (58) is connected with auxiliary burner (57).
7, combined heat storage and heating stove according to claim 1, the front panel that it is characterized in that described lampblack absorber (23) is provided with controller (24), wherein be provided with the control button of balance induced-draft fan (18), new wind transfer valve (29) and illuminating lamp, be provided with cooking stove controller (36) on the described kitchen range top (35), the control button and the water temperature that wherein are provided with water circulating pump (41), flue gas transfer valve (55), auxiliary heating gas electromagnetic valve (58) and auxiliary Electric air valve (56) and igniting are automatically set and display.
8, combined heat storage and heating stove according to claim 1 is characterized in that described water jacket (7) adopts the spirally coiled water jacket, and described heat gathering cover (31) is the bottom of a pan shape cover, and described air-water heat exchanger (10) is bundled tube or blade heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520090992 CN2800110Y (en) | 2005-05-24 | 2005-05-24 | Combined heat-storage heating stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520090992 CN2800110Y (en) | 2005-05-24 | 2005-05-24 | Combined heat-storage heating stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2800110Y true CN2800110Y (en) | 2006-07-26 |
Family
ID=36842606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520090992 Expired - Fee Related CN2800110Y (en) | 2005-05-24 | 2005-05-24 | Combined heat-storage heating stove |
Country Status (1)
| Country | Link |
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| CN (1) | CN2800110Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100543372C (en) * | 2005-05-24 | 2009-09-23 | 李荣江 | Combined heat storage and heating stove and method of operating thereof |
| CN107504533A (en) * | 2017-08-23 | 2017-12-22 | 上海多环油烟净化设备有限公司 | Dual-purpose type circularly purifying machine |
| CN110726174A (en) * | 2018-06-29 | 2020-01-24 | 宁波方太厨具有限公司 | Kitchen air conditioning system |
-
2005
- 2005-05-24 CN CN 200520090992 patent/CN2800110Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100543372C (en) * | 2005-05-24 | 2009-09-23 | 李荣江 | Combined heat storage and heating stove and method of operating thereof |
| CN107504533A (en) * | 2017-08-23 | 2017-12-22 | 上海多环油烟净化设备有限公司 | Dual-purpose type circularly purifying machine |
| WO2019037493A1 (en) * | 2017-08-23 | 2019-02-28 | 上海多环油烟净化设备有限公司 | Dual-purpose circulating purifier |
| CN107504533B (en) * | 2017-08-23 | 2020-03-31 | 上海多环油烟净化设备有限公司 | Dual-purpose circulation purifier |
| US11578876B2 (en) | 2017-08-23 | 2023-02-14 | Shanghai Duohuan Oil-Smoke Purification Equipment Co., Ltd. | Dual-purpose circulating purifier |
| CN110726174A (en) * | 2018-06-29 | 2020-01-24 | 宁波方太厨具有限公司 | Kitchen air conditioning system |
| CN110726174B (en) * | 2018-06-29 | 2023-10-20 | 宁波方太厨具有限公司 | Kitchen air conditioning system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |