CN202938487U - Oil-powered water heater - Google Patents
Oil-powered water heater Download PDFInfo
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- CN202938487U CN202938487U CN 201220458438 CN201220458438U CN202938487U CN 202938487 U CN202938487 U CN 202938487U CN 201220458438 CN201220458438 CN 201220458438 CN 201220458438 U CN201220458438 U CN 201220458438U CN 202938487 U CN202938487 U CN 202938487U
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Abstract
The utility model relates to the technology of water heater and discloses an oil-powered water heater. The oil-powered water heater comprises a frame, a water sleeve assembly is arranged in the frame, and a burner is arranged right below the water sleeve assembly. The water sleeve assembly comprises a clock-shaped inner water sleeve, a clock-shaped outer water sleeve and an outer heat preservation layer which are embedded and installed from inside to outside, a stream guidance fin for enabling water flow to spirally flow is respectively arranged in the inner water sleeve and the outer water sleeve, water flow channels of the inner water sleeve and the outer water sleeve are communicated, a smoke discharge channel is arranged between the inner water sleeve and the outer water sleeve, a smoke discharge hole communicated with the smoke discharge channel penetrates through the lower portion of the inner water sleeve, and a chimney hole communicated with the smoke discharge channel penetrates through the upper portion of the outer water sleeve. The burner is arranged on the lower portion of an inner sleeve of the inner water sleeve, and the inside of the inner sleeve of the inner water sleeve is a combusting chamber. A washing method of the oil-powered water heater is characterized in that the burner is disassembled firstly, the combusting chamber is cleaned, then the outer water sleeve and the inner water sleeve are separated, and finally smoke on the inside of the outer water sleeve and outside of the inner water sleeve is washed.
Description
Technical field
The utility model relates to the water heater technology, particularly a kind of fuel-oil water heater.
Background technology
Fuel-oil water heater is mainly used in providing hot water in the situations such as field work, motor driven guarantee.At present, the tradition fuel-oil water heater mainly is comprised of water heater body, burner and controller, the water heater body mainly comprises combustion chamber, hot-water cavity, smoke pipe, heat-insulation layer and exterior skin etc., and the burner burning of working in combustion chamber under controller action, to hot water heating in hot-water cavity.Tradition fuel-oil water heater when maintenance, only have burner and controller to separate from the water heater body, play not easy cleaning of the combustion chamber of heat exchange effect and smoke pipe, easily because flue dust is piled into the sheet dust and dirt, be unfavorable for the heat transfer property that keeps good on its wall; Traditional fuel-oil water heater, heat firepower and can not regulate continuously, so himself can not provide the hot water of equilibrium temperature in addition.
Summary of the invention
The purpose of this utility model is to provide a kind of fuel-oil water heater, by changing fuel-oil water heater, is Demountable, when making to improve heat transfer property, can make combustion chamber and discharge flue be convenient to clean.
In order to achieve the above object, the utility model is achieved by the following technical solutions.
Technical scheme one
A kind of fuel-oil water heater, is characterized in that, comprises framework, is provided with water jacket assembly in framework, is provided with burner under water jacket assembly; Described water jacket assembly comprises the inner water sleeve of the bell of nested installation from inside to outside, the outer water sleeve external thermal insulation of bell; Be respectively arranged with the distributing fin that makes the current helical flow in described inner water sleeve and outer water jacket, and inner water sleeve is connected with the water stream channel of outer water jacket; Be discharge flue in the middle of inner water sleeve and outer water jacket, be penetrated with the exhaust smoke hole be connected with discharge flue in the inner water sleeve bottom, water jacket top is penetrated with the chimney hole communicated with discharge flue outside; Described burner is arranged at the bottom of inner water sleeve inner sleeve, and the inside of inner water sleeve inner sleeve is combustion chamber.
Characteristics of the present utility model and further the improvement are:
Described inner water sleeve outer sleeve top is provided with the water channel post of hollow, described outer water jacket inner sleeve is provided with the water channel cylinder, described water channel post top is deep in the water channel cylinder, the mating surface of described water channel cylinder and water channel post is provided with the first sealing ring, the first sealing ring is double-deck, is provided with the first sealing ring between bilayer, and the first sealing ring top is provided with gland, gland is provided with gland, and described gland is connected to the water channel cylinder by the first bolt.
Described outer water jacket bottom is provided with outer water jacket extension edge, described inner lead bottom is the water storage ring set, water storage ring set outer end is provided with the inner water sleeve extension edge, outer water jacket bottom is provided with the second sealing ring with the water storage ring set top of inner water sleeve, be provided with the second sealing ring in the middle of described outer water jacket extension edge and inner water sleeve extension edge, outer water jacket extension edge and inner water sleeve extension edge are connected on framework by the second bolt.
Described inner water sleeve bottom is provided with the burner fixed mount, and burner is installed on the bottom of inner water sleeve inner sleeve by the burner fixed mount.
In described discharge flue, the inner water sleeve outer sleeve or outside be provided with helical form thermal-arrest fin on the water jacket inner sleeve.
Described outer water jacket is provided with cold water water inlet interface, and inner water sleeve is provided with hot water effluent's interface, and cold water water inlet interface is provided with into water cooling-water temperature sensor and water supply flow sensor, and hot water effluent's interface is provided with the water supply cooling-water temperature sensor; Be provided with outer water jacket dowel between described outer water jacket outer sleeve and outer water jacket inner sleeve, the top of outer water jacket has been connected by screw cover plate, and the cover plate bottom is provided with level sensor, is provided with the 3rd sealing ring between described cover plate and outer water jacket; The upper surface of described inner water sleeve inner sleeve is inclined-plane or plane, between inner water sleeve outer sleeve and inner water sleeve inner sleeve, is provided with the inner water sleeve dowel.
The top of described framework is provided with detachable upper end cover.
Described fuel-oil water heater also comprises intelligence control system, and described intelligence control system comprises the first control module and the second control module; Described the first control module is comprised of the first single-chip microcomputer and the GPIO input/output module, UART receiver module, CAN packet sending and receiving device and the D/A module that are connected with the first single-chip microcomputer respectively, wherein on the D/A module, be connected with burner firepower control module, be connected with display screen and button on the one GPIO input/output module, on CAN packet sending and receiving device, be connected with the CAN bus; Described the second control module is comprised of second singlechip and the 2nd GPIO input/output module, UART sending module and the A/D module that are connected with second singlechip respectively, wherein on the A/D module, be connected with into water cooling-water temperature sensor, flow of inlet water sensor, water supply cooling-water temperature sensor, D/A module, be connected with the UART receiver module on the UART sending module, the 2nd GPIO input/output module is connected with the burner operation block of state.
Technical scheme two
The cleaning method of above-mentioned fuel-oil water heater, is characterized in that, at first removes burner, the cleaning combustion chamber, then separate outer water jacket and inner water sleeve, then externally water jacket inside, the outside flue dust of inner water sleeve are cleaned respectively.
Fuel-oil water heater of the present utility model and cleaning method thereof, be divided into inner water sleeve and outer water jacket to water jacket, is provided with distributing fin in inner water sleeve and outer water jacket, can make current be heated evenly, and improves its heat transfer property simultaneously simultaneously; Be Demountable by changing fuel-oil water heater, can make combustion chamber and discharge flue be convenient to clean, keep the fuel-oil water heater good working order.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The contour structures schematic diagram that Fig. 1 is fuel-oil water heater of the present utility model;
Another visual angle schematic diagram of the contour structures that Fig. 2 is fuel-oil water heater of the present utility model;
The structure cutaway view that Fig. 3 is fuel-oil water heater of the present utility model;
The inside and outside water jacket top connection diagram that Fig. 4 is fuel-oil water heater of the present utility model;
The inside and outside water jacket bottom connection diagram that Fig. 5 is fuel-oil water heater of the present utility model;
The intelligence control system schematic block diagram that Fig. 6 is fuel-oil water heater of the present utility model.
In figure: 1, water jacket assembly; 2, framework; 3, chimney hole; 4, intelligence control system; 5, cold water water inlet interface; 6, hot water effluent's interface; 7, upper end cover; 8, cover plate; 9, level sensor; 10, screw; 11, outer water jacket dowel; 12, outer water jacket outer sleeve; 13, outer water jacket inner sleeve; 14, distributing fin; 15, exhaust smoke hole; 16, inner water sleeve outer sleeve; 17, inner water sleeve inner sleeve; 18, burner fixed mount; 19, burner; 20, inner water sleeve dowel; 21, inner water sleeve; 22, thermal-arrest fin; 23, outer water jacket; 24, external thermal insulation; 25, discharge flue; 26, combustion chamber; 27, the 3rd sealing ring; 28, the first bolt; 29, gland; 30, water channel cylinder; 31, water channel post; 32, the first sealing ring; 33, the first sealing ring; 34, gland; 35, the second bolt; 36, the second sealing ring; 37, inner water sleeve extension edge; 38, the second sealing ring; 39, outer water jacket extension edge; 40, water storage ring set.
The specific embodiment
With reference to Fig. 1, it is the contour structures schematic diagram of fuel-oil water heater of the present utility model; With reference to Fig. 2, it is another visual angle schematic diagram of contour structures of fuel-oil water heater of the present utility model; With reference to Fig. 3, it is the structure cutaway view of fuel-oil water heater of the present utility model.Fuel-oil water heater of the present utility model comprises framework 2, the top of framework 2 is provided with detachable upper end cover 7, framework 2 is divided into two-layer up and down, be provided with water jacket assembly 1 in the middle of upper strata, upper sides is provided with intelligence control system 4, in the lower floor of framework 2, be provided with burner 19 under inner lead inner sleeve 17, burner 19 by be fixed on inner water sleeve inner sleeve 17 under burner fixed mount 18 be fixed; Water jacket assembly 1 comprises the inner water sleeve 21 of the bell of nested installation from inside to outside, outer water jacket 23 and the external thermal insulation 24 of bell, inner water sleeve 21 is comprised of inner water sleeve inner sleeve 17 and inner water sleeve outer sleeve 16, form water cavity in the middle of inner water sleeve inner sleeve 17 and inner water sleeve outer sleeve 16, be provided with the inner water sleeve water stream channel in water cavity, inner water sleeve inner sleeve 17 inside are combustion chamber 26; Outer water jacket 23 is comprised of outer water jacket inner sleeve 13 and outer water jacket outer sleeve 12, in the middle of outer water jacket inner sleeve 13 and outer water jacket outer sleeve 12, forms water cavity, is provided with outer water jacket water stream channel in water cavity; Be provided with the distributing fin 14 that makes the current helical flow in inner water sleeve 21 and outer water jacket 23, the effect of distributing fin 14 is the streamline length that increases current, can make water be heated more even, improves heating efficiency simultaneously.Inner water sleeve 21 is middle with outer water jacket 23 is discharge flue 25, and inner water sleeve 21 bottoms are penetrated with the exhaust smoke hole 15 be connected with discharge flue 25, and water jacket 23 tops are penetrated with the chimney hole 3 be connected with discharge flue 25 outside; During burner 19 work, in combustion chamber, the 26 burning cigarettes that produce enter discharge flue 25 by exhaust smoke hole 15, then 3 discharges from the chimney hole; In discharge flue 25, be provided with spiral helicine thermal-arrest fin 22 on inner water sleeve outer sleeve 16, the effect of thermal-arrest fin 22 is the heats that absorb the burning cigarette, is transmitted on inner water sleeve outer sleeve 16 water is heated, can play the effect that reclaims heat, improve the efficiency of heating surface.Outer water jacket 23 is provided with cold water water inlet interface 5, and inner water sleeve 21 is provided with hot water effluent's interface 6, and cold water water inlet interface 5 is provided with into water cooling-water temperature sensor and water supply flow sensor, and hot water effluent's interface is provided with the water supply cooling-water temperature sensor.Outer water jacket outer sleeve 12 and 13 of outer water jacket inner sleeves are provided with outer water jacket dowel 11, the top of outer water jacket 23 is connected with cover plate 8 by screw 10, cover plate 8 bottoms are provided with level sensor 9, the effect of level sensor 9 is could start heating when it senses water, prevents that burner 19 dry combustion methods are damaged; The effect that 23 of cover plate 8 and outer water jackets are provided with the 3rd sealing ring 27, the three sealing rings 27 is to prevent that the water in outer water jacket 23 from overflowing; 17 of inner water sleeve outer sleeve 16 and inner water sleeve inner sleeves are provided with inner water sleeve dowel 20, and outer water jacket dowel 11 can reduce the water jacket distortion with inner water sleeve dowel 20.
With reference to Fig. 4, it is the inside and outside water jacket top connection diagram of fuel-oil water heater of the present utility model.Inner water sleeve outer sleeve 16 welded top have the water channel post 31 of hollow, be welded with water channel cylinder 30 on outer water jacket inner sleeve 13, water channel post 31 tops are deep in water channel cylinder 30, water channel cylinder 30 is provided with the first double-deck sealing ring 31 with the mating surface of water channel post 31, double-deck 31 of the first sealing rings are provided with the first sealing ring 33, the effect of the first sealing ring 31 and the first sealing ring 33 is to prevent that current from entering discharge flue 25, also prevents that the burning cigarette in discharge flue 25 from entering into outer water channel 23 simultaneously; The first sealing ring 31 tops are provided with gland 34, and gland 34 is provided with gland 29, and gland 29 is connected to water channel cylinder 30 by the first bolt 28, and gland 34 and gland 29 are fixed compression by the first sealing ring 31 and the first sealing ring 33; The cold water water inlet is water jacket 23 from cold water water inlet interface 5 enters, by distributing fin 14, the water spiral is arrived to outer water jacket 23 tops, current enter into inner water sleeve 21 by water channel post 31, upper surface, inclined-plane by inner lead inner sleeve 17, the water that enters inner water sleeve 21 can be directed to and carry out the helical flow heating on one side, the water after heating is used after flowing out by hot water effluent's interface 6.
With reference to Fig. 5, it is the inside and outside water jacket bottom connection diagram of fuel-oil water heater of the present utility model.Outer water jacket 23 bottoms are provided with outer water jacket extension edge 39, inner lead 21 bottoms are water storage ring set 40, the effect of water storage ring set 40 is to play an interim effect that stores and cushion heating to hot water, water storage ring set 40 outer ends are provided with inner water sleeve extension edge 37, the straight-flanked ring cover top of outer water jacket 23 bottoms and inner water sleeve 21 is provided with the second sealing ring 36, the effect of the second sealing ring 36 is to prevent that the burning cigarette in discharge flue 25 from leaking from bottom, also plays heat insulation effect simultaneously.Outer water jacket extension edge 39 and middle second sealing ring 38 that is provided with of inner water sleeve extension edge 37, the second sealing ring 38 plays the effect that the cigarette that again prevents from burning leaks, outer water jacket extension edge 39 and inner water sleeve extension edge 37 are connected on framework 2 by the second bolt 35, thereby complete the fixing of inner water sleeve 21 and outer water jacket 23 bottoms.
With reference to Fig. 6, it is the intelligence control system schematic block diagram of fuel-oil water heater of the present utility model.Intelligence control system comprises the first control module and the second control module; The first control module is comprised of the first single-chip microcomputer and the GPIO input/output module, UART receiver module, CAN packet sending and receiving device and the D/A module that are connected with the first single-chip microcomputer respectively, wherein on the D/A module, be connected with burner firepower control module, be connected with display screen and button on the one GPIO input/output module, on CAN packet sending and receiving device, be connected with the CAN bus; The second control module is comprised of second singlechip and the 2nd GPIO input/output module, UART sending module and the A/D module that are connected with second singlechip respectively, wherein on the A/D module, be connected with into water cooling-water temperature sensor, flow of inlet water sensor, water supply cooling-water temperature sensor, D/A module, be connected with the UART receiver module on the UART sending module, the 2nd GPIO input/output module is connected with the burner operation block of state, and the burner operation block of state comprises the state of level sensor; To the intake situation of cooling-water temperature sensor, flow of inlet water sensor, water supply flow sensor, burner combustion firepower of second singlechip is sent to the UART receiver module by the UART sending module after the A/D module is carried out information processing that the information of analog-to-digital conversion and burner operation state transform through the 2nd GPIO input/output module; During Based Intelligent Control, sending to the D/A module after the information that the first single-chip microcomputer receives the UART receiver module, the information reception & disposal of CAN packet sending and receiving device carries out after the digital-to-analogue conversion sending to burner firepower control module burner is carried out to Based Intelligent Control, while manually controlling, the first single-chip microcomputer carries out the rear control combustion device waterpower of digital-to-analogue conversion by sending to the D/A module after the information reception & disposal of the information of key-press input and CAN packet sending and receiving device, simultaneously, the first single-chip microcomputer is crossed a GPIO input/output module by the information exchange of burner and is sent to display screen and shown.
The cleaning method of fuel-oil water heater of the present utility model comprises the following steps:
1) lay down burner 19 from burner fixed mount 18, combustion chamber is cleaned;
2) unload the upper end cover 7 of underframe 2, twist off screw 10, lay down cover plate 8, then twist off the first bolt 28, lay down gland 29, gland 34, the first sealing ring 32 and the first sealing ring 33, twist off the second bolt 35, pull out the sensor signal wire terminal be connected with outer water jacket 23, by framework 2 upper ends, extract outer water jacket 23 out;
3) inboard of external water jacket 23 and the outside of inner water sleeve 21 are cleaned respectively, to reach the cleaning to discharge flue 25.
In fuel-oil water heater of the present utility model, be provided with separable inner water sleeve 21 and outer water jacket 23, in inner water sleeve 21 and outer water jacket 13, be provided with distributing fin 14, can make current be heated evenly, improve its heat transfer property simultaneously; At inner water sleeve 21 and 23 of outer water jackets, discharge flue 25 is set, outer water jacket 23 and burner 19 are unloaded to rear the cleaning outside and the inboard of water jacket 23 inboards, inner water sleeve 21 outward, thereby combustion chamber 26 and discharge flue 25 are kept clean, make it keep good heat transfer property; In addition, can be set as the manual mode heating, also can be by intelligence control system 4 heating, by the measurement of inductance to water inlet water temperature, flow of inlet water, output water temperature and to the monitoring of burner 19, can Based Intelligent Control burner 19 add heat, reach and set required water temperature, guarantee constant-temperature effluent.
Although below by reference to the accompanying drawings embodiment of the present utility model is described, the utility model is not limited to above-mentioned specific embodiments and applications field, and above-mentioned specific embodiments is only schematic, guiding, rather than restrictive.Those of ordinary skill in the art, under the enlightenment of this specification, in the situation that do not break away from the scope that the utility model claim is protected, can also make a variety of forms, and these all belong to the row of the utility model protection.
Claims (8)
1. a fuel-oil water heater, is characterized in that, comprises framework (2), is provided with water jacket assembly (1) in framework (2), is provided with burner (19) under water jacket assembly (1); Described water jacket assembly (1) comprises the inner water sleeve (21) of the bell of nested installation from inside to outside, outer water jacket (23) and the external thermal insulation (24) of bell; Be respectively arranged with the distributing fin (14) that makes the current helical flow in described inner water sleeve (21) and outer water jacket (23), and inner water sleeve (21) is connected with the water stream channel of outer water jacket (23); Inner water sleeve (21) is middle with outer water jacket (23) is discharge flue (25), be penetrated with the exhaust smoke hole (15) be connected with discharge flue (25) in inner water sleeve (21) bottom, water jacket (23) top is penetrated with the chimney hole (3) communicated with discharge flue (25) outside; Described burner (19) is arranged at the bottom of inner water sleeve inner sleeve (17), and the inside of inner water sleeve inner sleeve (17) is combustion chamber (26).
2. a kind of fuel-oil water heater according to claim 1, it is characterized in that, in described inner water sleeve (21), inner water sleeve outer sleeve (16) top is provided with the water channel post (31) of hollow, in described outer water jacket (23), outer water jacket inner sleeve (13) is provided with water channel cylinder (30), described water channel post (31) top is deep in water channel cylinder (30), described water channel cylinder (30) is provided with the first sealing ring (32) with the mating surface of water channel post (31), the first sealing ring (32) is double-deck, be provided with the first sealing ring (33) between bilayer, the first sealing ring top is provided with gland (34), gland is provided with gland (29), described gland (29) is connected to water channel cylinder (30) by the first bolt (28).
3. a kind of fuel-oil water heater according to claim 1, it is characterized in that, described outer water jacket (23) bottom is provided with outer water jacket extension edge (39), described inner lead (21) bottom is water storage ring set (40), water storage ring set (40) outer end is provided with inner water sleeve extension edge (37), water storage ring set (40) top of the bottom of outer water jacket (23) and inner water sleeve (21) is provided with the second sealing ring (36), described outer water jacket extension edge (39) and middle the second sealing ring (38) that is provided with of inner water sleeve extension edge (37), outer water jacket extension edge (37) is connected on framework (2) by the second bolt (35) with inner water sleeve extension edge (39).
4. a kind of fuel-oil water heater according to claim 1, is characterized in that, described inner water sleeve (21) bottom is provided with burner fixed mount (18), and burner (19) is installed on the bottom of inner water sleeve inner sleeve (17) by burner fixed mount (18).
5. a kind of fuel-oil water heater according to claim 1, is characterized in that, in described discharge flue (25), inner water sleeve outer sleeve (16) or outside be provided with helical form thermal-arrest fin (22) on water jacket inner sleeve (13).
6. a kind of fuel-oil water heater according to claim 1, it is characterized in that, described outer water jacket (23) is provided with cold water water inlet interface (5), inner water sleeve (21) is provided with hot water effluent's interface (6), cold water water inlet interface (5) is provided with into water cooling-water temperature sensor and water supply flow sensor, and hot water effluent's interface (6) is provided with the water supply cooling-water temperature sensor; In described outer water jacket (23), be provided with outer water jacket dowel (11) between outer water jacket outer sleeve (12) and outer water jacket inner sleeve (13), the top of outer water jacket (23) is connected with cover plate (8) by screw (10), cover plate (8) bottom is provided with level sensor (9), is provided with the 3rd sealing ring (27) between described cover plate (8) and outer water jacket (23); The upper surface of described inner water sleeve inner sleeve (17) is inclined-plane or plane, between inner water sleeve outer sleeve (16) and inner water sleeve inner sleeve (17), is provided with inner water sleeve dowel (20).
7. a kind of fuel-oil water heater according to claim 1, is characterized in that, the top of described framework (2) is provided with detachable upper end cover (7).
8. a kind of fuel-oil water heater according to claim 1, is characterized in that, described fuel-oil water heater also comprises intelligence control system (4), and described intelligence control system (4) comprises the first control module and the second control module; Described the first control module is comprised of the first single-chip microcomputer and the GPIO input/output module, UART receiver module, CAN packet sending and receiving device and the D/A module that are connected with the first single-chip microcomputer respectively, wherein on the D/A module, be connected with burner firepower control module, be connected with display screen and button on the one GPIO input/output module, on CAN packet sending and receiving device, be connected with the CAN bus; Described the second control module is comprised of second singlechip and the 2nd GPIO input/output module, UART sending module and the A/D module that are connected with second singlechip respectively, wherein on the A/D module, be connected with into water cooling-water temperature sensor, flow of inlet water sensor, water supply cooling-water temperature sensor, D/A module, be connected with the UART receiver module on the UART sending module, the 2nd GPIO input/output module is connected with the burner operation block of state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220458438 CN202938487U (en) | 2012-09-10 | 2012-09-10 | Oil-powered water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220458438 CN202938487U (en) | 2012-09-10 | 2012-09-10 | Oil-powered water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202938487U true CN202938487U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220458438 Expired - Fee Related CN202938487U (en) | 2012-09-10 | 2012-09-10 | Oil-powered water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202938487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829541A (en) * | 2012-09-10 | 2012-12-19 | 中国人民解放军总后勤部建筑工程研究所 | Fuel oil water heater and cleaning method thereof |
-
2012
- 2012-09-10 CN CN 201220458438 patent/CN202938487U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829541A (en) * | 2012-09-10 | 2012-12-19 | 中国人民解放军总后勤部建筑工程研究所 | Fuel oil water heater and cleaning method thereof |
| CN102829541B (en) * | 2012-09-10 | 2014-07-09 | 中国人民解放军总后勤部建筑工程研究所 | Fuel oil water heater and cleaning method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20200910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |