CN102829541A - Fuel oil water heater and cleaning method thereof - Google Patents
Fuel oil water heater and cleaning method thereof Download PDFInfo
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- CN102829541A CN102829541A CN2012103325129A CN201210332512A CN102829541A CN 102829541 A CN102829541 A CN 102829541A CN 2012103325129 A CN2012103325129 A CN 2012103325129A CN 201210332512 A CN201210332512 A CN 201210332512A CN 102829541 A CN102829541 A CN 102829541A
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Abstract
The invention relates to a water heater technology and discloses a fuel oil water heater and a cleaning method of the fuel oil water heater. The fuel oil water heater comprises a framework, wherein a water jacket assembly is arranged in the framework, and a burner is arranged just below the water jacket assembly; the water jacket assembly comprises a bell type internal water jacket, a bell type external water jacket and an external insulating layer which are sleeved from inside to outside; the internal water jacket and the external water jacket are respectively provided with guiding fins for making water flow helicoidally flow, and water flow channels of the internal water jacket and the external water jacket are communicated; a smoke exhaust channel is arranged between the internal water jacket and the external water jacket, a smoke vent communicated wiht the smoke exhaust channel is penetrated at the lower part of the internal water jacket, and a chimney hole communicated with the smoke exhaust channel is penetrated at the upper part of the external water jacket; and the burner is arranged at the lower part of an inner sleeve of the internal water jacket, and the inside of the inner sleeve of the internal water jacket is a combustion chamber. The cleaning method of the fuel oil water heater is characterized by firstly dismounting the burner, cleaning the combustion chamber, separating the external water jacket and the internal water jacket, and respectively cleaning smoke dust inside the external water jacket and outside the internal water jacket.
Description
Technical field
The present invention relates to the water heater technology, particularly a kind of fuel-oil water heater and cleaning method thereof.
Background technology
Fuel-oil water heater is mainly used under the situation such as field work, motor driven guarantee hot water is provided.At present; The tradition fuel-oil water heater mainly is made up 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 under controller action, in the combustion chamber, working is to hot water heating in the hot-water cavity.During the maintenance of tradition fuel-oil water heater, have only burner and controller to separate from the water heater body, the combustion chamber and the smoke pipe that play the heat exchange effect are difficult for cleaning, and are piled into the sheet dust and dirt because of flue dust easily on its wall, are unfavorable for keeping the good heat transfer performance; Traditional in addition fuel-oil water heater, the heating firepower can not be regulated continuously, so himself can not provide the hot water of equilibrium temperature.
Summary of the invention
The object of the present invention is to provide a kind of fuel-oil water heater and cleaning method thereof, is detachable structure through changing fuel-oil water heater, makes in the raising heat transfer property, can make combustion chamber and discharge flue be convenient to clean.
In order to achieve the above object, the present invention adopts following technical scheme to be achieved.
Technical scheme one
A kind of fuel-oil water heater is characterized in that, comprises framework, is provided with water jacket assembly in the framework, is provided with burner under the water jacket assembly; Said 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 said inner water sleeve and the outer water jacket, and inner water sleeve is connected with the water stream channel of outer water jacket; Inner water sleeve is middle with outer water jacket to be discharge flue, is penetrated with the exhaust smoke hole that is connected with discharge flue in the inner water sleeve bottom, and water jacket top is penetrated with the chimney hole that communicates with discharge flue outside; Said burner is arranged at the bottom of inner water sleeve inner sleeve, and the inside of inner water sleeve inner sleeve is the combustion chamber.
Characteristics of the present invention are with further improving:
Said inner water sleeve outer sleeve top is provided with the water channel post of hollow, and said outer water jacket inner sleeve is provided with the water channel tube, and said water channel post top is deep in the water channel tube; The mating surface of said water channel tube and water channel post is provided with first sealing ring; First sealing ring is double-deck, is provided with first sealing ring between bilayer, and the first sealing ring top is provided with gland; Gland is provided with gland, and said gland is connected to the water channel tube through first bolt.
Said outer water jacket bottom is provided with outer water jacket extension edge; Said 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 second sealing ring with the water storage ring set top of inner water sleeve, is provided with second sealing ring in the middle of said outer water jacket extension edge and the inner water sleeve extension edge, and outer water jacket extension edge and inner water sleeve extension edge are connected on the framework through second bolt.
Said inner water sleeve bottom is provided with the burner fixed mount, and burner is installed on the bottom of inner water sleeve inner sleeve through the burner fixed mount.
In the said discharge flue, inner water sleeve outer sleeve or outer water jacket inner sleeve are provided with helical form thermal-arrest fin.
Said 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 said outer water jacket outer sleeve and outer water jacket inner sleeve, the top of outer water jacket is connected with cover plate through screw, and the cover plate bottom is provided with level sensor, is provided with the 3rd sealing ring between said cover plate and outer water jacket; The upper surface of said inner water sleeve inner sleeve is inclined-plane or plane, is provided with the inner water sleeve dowel between inner water sleeve outer sleeve and inner water sleeve inner sleeve.
The top of said framework is provided with detachable upper end cover.
Said fuel-oil water heater also comprises intelligence control system, and said intelligence control system comprises first control module and second control module; Said first control module is made up of 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 first single-chip microcomputer respectively; Wherein be connected with burner firepower control module on the D/A module; Be connected with display screen and button on the one GPIO input/output module, be connected with the CAN bus on the CAN packet sending and receiving device; Said second control module is made up 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 be connected with into water cooling-water temperature sensor, flow of inlet water sensor, water supply cooling-water temperature sensor, D/A module on the A/D 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, and the cleaning combustion chamber is separated outer water jacket and inner water sleeve again, and externally water jacket inside, the outside flue dust of inner water sleeve clean respectively then.
Fuel-oil water heater of the present invention and cleaning method thereof are divided into inner water sleeve and outer water jacket to water jacket, simultaneously inner water sleeve and outside be provided with distributing fin in the water jacket, current are heated evenly, improve its heat transfer property simultaneously; Through changing fuel-oil water heater is detachable structure, can make combustion chamber and discharge flue be convenient to clean, and keeps the fuel-oil water heater good working order.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further explain.
Fig. 1 is the contour structures sketch map of fuel-oil water heater of the present invention;
Fig. 2 is another visual angle sketch map of contour structures of fuel-oil water heater of the present invention;
Fig. 3 is the structure cutaway view of fuel-oil water heater of the present invention;
Fig. 4 is that the inside and outside water jacket top of fuel-oil water heater of the present invention connects sketch map;
Fig. 5 is that the inside and outside water jacket bottom of fuel-oil water heater of the present invention connects sketch map;
Fig. 6 is the intelligence control system schematic block diagram of fuel-oil water heater of the present invention.
Among the 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, first bolt; 29, gland; 30, water channel tube; 31, water channel post; 32, first sealing ring; 33, first sealing ring; 34, gland; 35, second bolt; 36, second sealing ring; 37, inner water sleeve extension edge; 38, second sealing ring; 39, outer water jacket extension edge; 40, water storage ring set.
The specific embodiment
With reference to Fig. 1, be the contour structures sketch map of fuel-oil water heater of the present invention; With reference to Fig. 2, be another visual angle sketch map of contour structures of fuel-oil water heater of the present invention; With reference to Fig. 3, be the structure cutaway view of fuel-oil water heater of the present invention.Fuel-oil water heater of the present invention comprises framework 2; The top of framework 2 is provided with detachable upper end cover 7, and framework 2 is divided into two-layer up and down, is provided with water jacket assembly 1 in the middle of the upper strata; Upper sides is provided with intelligence control system 4; In the lower floor of framework 2, be provided with burner 19 under the inner lead inner sleeve 17, burner 19 through be fixed on inner water sleeve inner sleeve 17 under burner fixed mount 18 fix; Water jacket assembly 1 comprises the inner water sleeve 21 of the bell of nested installation from inside to outside, the outer water jacket 23 and the external thermal insulation 24 of bell; Inner water sleeve 21 is made up of inner water sleeve inner sleeve 17 and inner water sleeve outer sleeve 16; Constitute water cavity in the middle of inner water sleeve inner sleeve 17 and the inner water sleeve outer sleeve 16; Be provided with the inner water sleeve water stream channel in the water cavity, inner water sleeve inner sleeve 17 inside are combustion chamber 26; Outer water jacket 23 is made up of outer water jacket inner sleeve 13 and outer water jacket outer sleeve 12, constitutes water cavity in the middle of outer water jacket inner sleeve 13 and the outer water jacket outer sleeve 12, is provided with outer water jacket water stream channel in the water cavity; Be provided with the distributing fin 14 that makes the current helical flow in inner water sleeve 21 and the outer water jacket 23, the effect of distributing fin 14 is the streamline length that increases current, and it is more even that water is heated, and improves heating efficiency simultaneously.In the middle of inner water sleeve 21 and the outer water jacket 23 is discharge flue 25, and inner water sleeve 21 bottoms are penetrated with the exhaust smoke hole 15 that is connected with discharge flue 25, and water jacket 23 tops are penetrated with the chimney hole 3 that is connected with discharge flue 25 outside; During burner 19 work, the burning cigarette of 26 generations gets into discharge flues 25 through exhaust smoke hole 15 in the combustion chamber, 3 discharges from the chimney hole then; In the discharge flue 25; Inner water sleeve outer sleeve 16 is provided with spiral helicine thermal-arrest fin 22, and the effect of thermal-arrest fin 22 is the heats that absorb the burning cigarette, is transmitted on the 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 through screw 10; Cover plate 8 bottoms are provided with level sensor 9; The effect of level sensor 9 is when it senses water, could start heating, 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 the 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, be the inside and outside water jacket top connection sketch map of fuel-oil water heater of the present invention.Inner water sleeve outer sleeve 16 welded top have the water channel post 31 of hollow; Be welded with water channel tube 30 on the outer water jacket inner sleeve 13; Water channel post 31 tops are deep in the water channel tube 30, and water channel tube 30 is provided with the first double-deck sealing ring 31 with the mating surface of water channel post 31, and 31 of double-deck first sealing rings are provided with first sealing ring 33; The effect of first sealing ring 31 and first sealing ring 33 is to prevent that current from getting into discharge flue 25, also prevents that the burning cigarette in the discharge flue 25 from entering into outer water channel 23 simultaneously; 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 tube 30 through first bolt 28, and gland 34 is fixed and clamped first sealing ring 31 and first sealing ring 33 with gland 29; The cold water water inlet is water jacket 23 outside cold water water inlet interface 5 gets into; Through distributing fin 14 the water spiral is risen to outer water jacket 23 tops; Current enter into inner water sleeve 21 through water channel post 31; Through the upper surface, inclined-plane of inner lead inner sleeve 17, carry out the helical flow heating Yi Bian can the water that get into inner water sleeve 21 be directed to, the water after the heating flows out the back through hot water effluent's interface 6 to be used.
With reference to Fig. 5, be the inside and outside water jacket bottom connection sketch map of fuel-oil water heater of the present invention.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, and water storage ring set 40 outer ends are provided with inner water sleeve extension edge 37, and the straight-flanked ring cover top of outer water jacket 23 bottoms and inner water sleeve 21 is provided with second sealing ring 36; The effect of second sealing ring 36 is to prevent that the burning cigarette in the discharge flue 25 from leaking from the bottom, also plays heat insulation effect simultaneously.Outer water jacket extension edge 39 and inner water sleeve extension edge 37 middle second sealing rings 38 that are provided with; Second sealing ring 38 plays the effect that the cigarette that prevents once more to burn leaks; Outer water jacket extension edge 39 is connected on the framework 2 through second bolt 35 with inner water sleeve extension edge 37, thereby accomplishes the fixing of inner water sleeve 21 and outer water jacket 23 bottoms.
With reference to Fig. 6, be the intelligence control system schematic block diagram of fuel-oil water heater of the present invention.Intelligence control system comprises first control module and second control module; First control module is made up of 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 first single-chip microcomputer respectively; Wherein be connected with burner firepower control module on the D/A module; Be connected with display screen and button on the one GPIO input/output module, be connected with the CAN bus on the CAN packet sending and receiving device; Second control module is made up 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 be connected with into water cooling-water temperature sensor, flow of inlet water sensor, water supply cooling-water temperature sensor, D/A module on the A/D 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; Second singlechip will be intake and will be sent to the UART receiver module by the UART sending module after the information processing that the situation of cooling-water temperature sensor, flow of inlet water sensor, water supply flow sensor, burner combustion firepower carries out analog-to-digital conversion through the A/D module information 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 first single-chip microcomputer receives the UART receiver module, the information of CAN packet sending and receiving device receive and handles carries out sending to burner firepower control module after digital-to-analogue transforms burner is carried out Based Intelligent Control; When manually controlling; First single-chip microcomputer receives the information of the information of button input and CAN packet sending and receiving device and sends to the D/A module after handling and carry out digital-to-analogue and transform back control burner waterpower; Simultaneously, first single-chip microcomputer sends to display screen with the information of burner through a GPIO input/output module and shows.
The cleaning method of fuel-oil water heater of the present invention may further comprise the steps:
1) lays down burner 19 from burner fixed mount 18, the combustion chamber is cleaned;
2) unload the upper end cover 7 of underframe 2; Twist screw 10, lay down cover plate 8, twist first bolt 28 then; Lay down gland 29, gland 34, first sealing ring 32 and first sealing ring 33; Twist second bolt 35, pull out the sensor signal wire terminal that is connected with outer water jacket 23, extract outer water jacket 23 out by framework 2 upper ends;
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 the fuel-oil water heater of the present invention, be provided with separable inner water sleeve 21 and outer water jacket 23, be provided with distributing fin 14 in inner water sleeve 21 and the outer water jacket 13, current are heated evenly, improve its heat transfer property simultaneously; 23 of water jackets are provided with discharge flue 25 outside inner water sleeve 21 reaches; Unload outer water jacket 23 and burner 19 outside and the inboard of the outer water jacket of cleaning 23 inboards, back, inner water sleeve 21; Thereby combustion chamber 26 and discharge flue 25 are kept clean, make it keep the good heat transfer performance; In addition; Can be set at the manual mode heating; Also can be through intelligence control system 4 heating, through to the measurement of inductance of water inlet water temperature, flow of inlet water, water outlet 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 more than combine accompanying drawing that embodiment of the present invention are described, the present invention is not limited to above-mentioned specific embodiments and applications field, and above-mentioned specific embodiments only is schematic, guiding, rather than restrictive.Those of ordinary skill in the art under the situation that does not break away from the scope that claim of the present invention protects, can also make a variety of forms under the enlightenment of this specification, these all belong to the row of the present invention's protection.
Claims (9)
1. a fuel-oil water heater is characterized in that, comprises framework (2), is provided with water jacket assembly (1) in the framework (2), is provided with burner (19) under the water jacket assembly (1); Said water jacket assembly (1) comprises the inner water sleeve (21) of the bell of nested installation from inside to outside, the 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 said inner water sleeve (21) and the 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) to be discharge flue (25); Be penetrated with the exhaust smoke hole (15) that is connected with discharge flue (25) in inner water sleeve (21) bottom, water jacket (23) top is penetrated with the chimney hole (3) that communicates with discharge flue (25) outside; Said 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 is characterized in that, said inner water sleeve outer sleeve (16) top is provided with the water channel post (31) of hollow; Said outer water jacket inner sleeve (13) is provided with water channel tube (30); Said water channel post (31) top is deep in the water channel tube (30), and said water channel tube (30) is provided with first sealing ring (32) with the mating surface of water channel post (31), and first sealing ring (32) is double-deck; Be provided with first sealing ring (33) between bilayer; The first sealing ring top is provided with gland (34), and gland is provided with gland (29), and said gland (29) is connected to water channel tube (30) through first bolt (28).
3. a kind of fuel-oil water heater according to claim 1; It is characterized in that; Said outer water jacket (23) bottom is provided with outer water jacket extension edge (39); Said inner lead (21) bottom is water storage ring set (40), and water storage ring set (40) outer end is provided with inner water sleeve extension edge (37), and water storage ring set (40) top of the bottom of outer water jacket (23) and inner water sleeve (21) is provided with second sealing ring (36); Said outer water jacket extension edge (39) and middle second sealing ring (38) that is provided with of inner water sleeve extension edge (37), outer water jacket extension edge (37) is connected on the framework (2) through 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, said 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) through burner fixed mount (18).
5. a kind of fuel-oil water heater according to claim 1 is characterized in that, in the said discharge flue (25), inner water sleeve outer sleeve (16) or outer water jacket inner sleeve (13) are provided with helical form thermal-arrest fin (22).
6. a kind of fuel-oil water heater according to claim 1; It is characterized in that; Said 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), 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 (6) is provided with the water supply cooling-water temperature sensor; Be provided with outer water jacket dowel (11) between said 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) through screw (10); Cover plate (8) bottom is provided with level sensor (9), is provided with the 3rd sealing ring (27) between said cover plate (8) and outer water jacket (23); The upper surface of said inner water sleeve inner sleeve (17) is inclined-plane or plane, is provided with inner water sleeve dowel (20) between inner water sleeve outer sleeve (16) and inner water sleeve inner sleeve (17).
7. a kind of fuel-oil water heater according to claim 1 is characterized in that, the top of said 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, said fuel-oil water heater also comprises intelligence control system (4), and said intelligence control system (4) comprises first control module and second control module; Said first control module is made up of 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 first single-chip microcomputer respectively; Wherein be connected with burner firepower control module on the D/A module; Be connected with display screen and button on the one GPIO input/output module, be connected with the CAN bus on the CAN packet sending and receiving device; Said second control module is made up 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 be connected with into water cooling-water temperature sensor, flow of inlet water sensor, water supply cooling-water temperature sensor, D/A module on the A/D 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.
9. the cleaning method of a fuel-oil water heater; Based on the described fuel-oil water heater of arbitrary claim 1-9; It is characterized in that, at first remove burner (19), clean combustion chamber (26); Separate outer water jacket (23) and inner water sleeve (21) again, the flue dust of outside of distinguishing inside, the inner water sleeve (21) of external water jacket (23) then cleans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210332512.9A CN102829541B (en) | 2012-09-10 | 2012-09-10 | Fuel oil water heater and cleaning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210332512.9A CN102829541B (en) | 2012-09-10 | 2012-09-10 | Fuel oil water heater and cleaning method thereof |
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| Publication Number | Publication Date |
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| CN102829541A true CN102829541A (en) | 2012-12-19 |
| CN102829541B CN102829541B (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210332512.9A Active CN102829541B (en) | 2012-09-10 | 2012-09-10 | Fuel oil water heater and cleaning method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359033A (en) * | 2021-07-22 | 2021-09-07 | 抚顺煤矿电机制造有限责任公司 | External water jacket for coal mining machine motor type test |
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| CN113359033A (en) * | 2021-07-22 | 2021-09-07 | 抚顺煤矿电机制造有限责任公司 | External water jacket for coal mining machine motor type test |
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| CN102829541B (en) | 2014-07-09 |
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