CN221099002U - Dry burning preventing device for electric boiler - Google Patents
Dry burning preventing device for electric boiler Download PDFInfo
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- CN221099002U CN221099002U CN202322993611.8U CN202322993611U CN221099002U CN 221099002 U CN221099002 U CN 221099002U CN 202322993611 U CN202322993611 U CN 202322993611U CN 221099002 U CN221099002 U CN 221099002U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 122
- 238000005303 weighing Methods 0.000 claims abstract description 27
- 238000009841 combustion method Methods 0.000 claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims description 14
- 230000002265 prevention Effects 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model relates to the technical field of electric boilers, in particular to an electric boiler dry combustion preventing device which comprises a base, wherein a positioning supporting groove and a water storage tank are arranged at the top of the base, an electric boiler body is arranged on the positioning supporting groove, a rectangular positioning seat is arranged at the bottom of the electric boiler body, a rectangular top plate is arranged at the bottom of the rectangular positioning seat, a rectangular bottom plate is arranged at the bottom of the inner wall of the positioning supporting groove, a weighing sensor is arranged at the top of the rectangular bottom plate, an electric boiler controller and a dry combustion preventing controller are arranged at the top of the electric boiler body, and a water pump is arranged at the top of the water storage tank. This electric boiler prevents dry combustion method device, when weighing sensor detects that the whole weight of electric boiler body reaches the threshold value of setting, prevent dry combustion method controller control water pump, solenoid valve, warning light and buzzer start, control electric boiler controller simultaneously and close electric boiler work, make the water pump carry the boiler in the electric boiler body with the water in the storage water tank in, avoid the water in the boiler too little and because the condition that the high temperature appears continuing dry combustion method.
Description
Technical Field
The utility model relates to the technical field of electric boilers, in particular to an electric boiler dry burning prevention device.
Background
The electric boiler is also called an electric heating boiler or an electric heating boiler, and is a boiler device which takes electric power as energy and converts the electric power into heat energy, so that steam, high temperature water or an organic heat carrier with certain heat energy is output outwards through boiler conversion.
The patent with the publication number of CN214746521U discloses an electric boiler dry burning prevention device, which comprises a bottom plate, wherein a weighing device is fixedly arranged in the middle of the upper surface of the bottom plate, a connecting rod is arranged on the upper surface of the weighing device, a storage tray is fixedly arranged at the top end of the connecting rod, a placing plate is fixedly arranged in the storage tray, a gravity sensor is arranged on one side of the outer part of the weighing device, an alarm is fixedly arranged on one side of the outer part of the bottom plate, a fixed plate is arranged below the bottom plate, an electric push rod is fixedly arranged on the upper surface of the fixed plate, and the top end of the electric push rod is fixedly arranged on the lower surface of the bottom plate; the weight of the electric boiler is detected by the weighing device at moment, meanwhile, the weight is transmitted to the gravity sensor in the alarm through the gravity sensor, the gravity sensor is transmitted to the display screen after data analysis, the content of water in the boiler is detected at moment, when the fact that the water in the boiler is less or no water is detected, and the boiler is working, the gravity sensor transmits signals to the loudspeaker, so that the loudspeaker gives an alarm, and the effect of preventing the boiler from being burned is achieved.
Although the content of water in the boiler can be detected through the gravity sensor at any time in the prior art, when the fact that the water in the boiler is less or no water is detected and the boiler is working is detected, the gravity sensor transmits signals to the loudspeaker so that the loudspeaker gives an alarm, but the prior art only has the functions of detecting and giving an alarm when in use, can not intervene in the dry burning prevention of the electric boiler, and if the electric boiler is not closed in time by a worker, the electric boiler still keeps working, and the dry burning prevention device of the electric boiler can still cause the dry burning damage of the electric boiler.
Disclosure of utility model
The utility model aims to provide an electric boiler dry burning prevention device, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The utility model provides an electric boiler prevents dry combustion method device, includes the base, the top of base is equipped with location supporting groove and storage water tank, the storage water tank is located the rear side of location supporting groove, be equipped with electric boiler body on the location supporting groove, the bottom of electric boiler body is equipped with the rectangle positioning seat of activity grafting in the location supporting groove, make electric boiler body peg graft on the location supporting groove, the middle part of rectangle positioning seat bottom is equipped with the rectangle roof, the middle part of location supporting groove inner wall bottom is equipped with the rectangle bottom plate, the top of rectangle bottom plate is equipped with weighing sensor, weighing sensor's detection end offsets with the bottom of rectangle roof, detects the whole weight of electric boiler body through weighing sensor, and when the whole weight of electric boiler body detected the electric boiler body reduces gradually, prevents dry combustion method controller control water pump, solenoid valve, warning light and buzzer when the weighing sensor detects that the whole weight of electric boiler body reaches the threshold value that sets up, and simultaneously control electric boiler controller closes electric boiler work, makes the water pump carry the boiler in this internal water-logging to the boiler, the water tank of boiler is avoided the condition that the excessive temperature is high and the dry combustion method is continued because of the water tank is less;
The utility model discloses a boiler, including electric boiler body, water pump, water supply pipe, electric boiler body's top and be close to the position of front side are equipped with electric boiler controller and prevent dry combustion method controller, electric boiler controller control electric boiler work, prevent dry combustion method controller can control electric boiler controller work, the top of storage water tank and be close to left position are equipped with the water pump, the input of water pump communicates with the storage water tank through the drinking-water pipe, the output of water pump is connected with the water supply pipe, be equipped with the solenoid valve on the water supply pipe, avoid appearing the condition that water overflow in the electric boiler arrives in the water supply pipe, the one end that the water supply pipe kept away from the water pump communicates with the inside boiler of electric boiler body, and the water pump carries the water in the storage water tank to with the water supply pipe to in the leading-in the boiler through the water supply pipe.
Preferably, the bottom of base just is close to the position of four corners and all is equipped with the universal wheel that can brake, the bottom of base just is close to the position at four side middle parts and all is equipped with stable subassembly, and the user of being convenient for removes and the fixed electric boiler who uses this dry combustion method device of preventing.
Preferably, the stabilizing component comprises an internal thread pipe, the top of the internal thread pipe is provided with a mounting seat, the mounting seat is detachably connected to the bottom of the base through a bolt, the internal thread pipe is internally connected with a thread supporting rod, the bottom of the thread supporting rod is rotationally connected with an extrusion plate, the height of the extrusion plate is adjusted through the thread supporting rod, and the extrusion plate can be propped against the ground, so that the stability of the base during placement is improved, and the stability of an electric boiler is further ensured.
Preferably, the top of stripper plate and be close to the position of outward flange and be equipped with a plurality of columns of stirring of arranging with annular array, convenient to use person rotates the stripper plate, the bottom of stripper plate is equipped with the slipmat, increases the frictional force between stripper plate and the ground, improves the stripper plate and offsets the stability that is with ground.
Preferably, the bottom of rectangle positioning seat and the position that is close to four corners all are equipped with circular inserted bar, circular slot has all been seted up to the bottom of location supporting groove inner wall and the position that is close to four corners, four circular inserted bar activity respectively peg graft in four circular slots, improve the stability of rectangle positioning seat.
Preferably, the left side of storage water tank is vertical to be equipped with the bar observation window, and convenient to use person looks over the residual water volume in the storage water tank, the top of storage water tank and be close to the position on right side and be equipped with the water injection pipe of taking the valve for pour into the water purification into in the storage water tank, the bottom on storage water tank right side is equipped with the drain pipe of taking the valve, when not using this dry combustion method device, is used for discharging the water in the storage water tank.
Preferably, the top of electric boiler body and the position that is close to the rear side are equipped with the attention device, be equipped with warning light and bee calling organ on the attention device, when preventing dry combustion method device start, send audible and visual alarm, effectively remind the staff that electric boiler appears unusual, need in time repair.
Preferably, the weighing sensor, the water pump, the electromagnetic valve, the warning lamp, the buzzer and the electric boiler controller are respectively and electrically connected with the dry combustion method prevention controller through wires, and when the weighing sensor detects that the whole weight of the electric boiler body reaches a set threshold value, the dry combustion method prevention controller controls the water pump, the electromagnetic valve, the warning lamp and the buzzer to start and simultaneously controls the electric boiler controller to close the electric boiler.
Compared with the prior art, the utility model has the beneficial effects that:
1. This electric boiler prevents dry combustion method device detects the whole weight of electric boiler body through weighing sensor, when the water in the electric boiler body gradually reduces, the whole weight of electric boiler body can diminish, when weighing sensor detects the whole weight of electric boiler body and reaches the threshold value of setting, prevent dry combustion method controller control water pump, the solenoid valve, warning light and buzzer start, control electric boiler controller simultaneously and close electric boiler work, make the water pump carry the water in the storage water tank to the boiler in the electric boiler body, avoid the water in the boiler too little and because the condition that the high dry combustion method of appearance continues in temperature, when preventing dry combustion method device start, send audible and visual alarm, effectively remind staff that the electric boiler appears unusual, need repair in time.
2. By arranging four braked universal wheels and four stabilizing components at the bottom of the base, a user can conveniently move and fix the electric boiler applying the dry combustion device.
Drawings
FIG. 1 is a schematic view of a first view angle structure of the present utility model;
FIG. 2 is a schematic diagram of an overall second view structure according to the present utility model;
FIG. 3 is a schematic diagram of an assembled structure of an electric boiler body and a rectangular positioning seat according to the present utility model;
FIG. 4 is a schematic view of a portion of the structure of the present utility model;
FIG. 5 is a schematic view of a stabilizing assembly according to the present utility model.
In the figure: 1. a base; 2. positioning the supporting groove; 20. a rectangular bottom plate; 21. a circular slot; 3. an electric boiler body; 30. an electric boiler controller; 4. a dry burning prevention controller; 5. an alarm; 50. a warning light; 51. a buzzer; 6. a water storage tank; 60. a strip-shaped observation window; 61. a water injection pipe; 62. a drain pipe; 7. a rectangular positioning seat; 70. a rectangular top plate; 71. a circular insert rod; 8. a weighing sensor; 9. a stabilizing assembly; 90. an internally threaded tube; 91. a mounting base; 92. a threaded support rod; 93. an extrusion plate; 930. stirring the column; 94. an anti-slip pad; 10. a water pump; 11. a water supply pipe; 12. an electromagnetic valve; 13. the universal wheel can be braked.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1-5, the present utility model provides a technical solution:
The utility model provides an electric boiler prevents dry combustion method device, including base 1, the top of base 1 is equipped with location supporting groove 2 and storage water tank 6, storage water tank 6 is located the rear side of location supporting groove 2, be equipped with electric boiler body 3 on the location supporting groove 2, the bottom of electric boiler body 3 is equipped with the rectangle positioning seat 7 of activity grafting in location supporting groove 2, make electric boiler body 3 peg graft on location supporting groove 2, the middle part of rectangle positioning seat 7 bottom is equipped with rectangle roof 70, the middle part of location supporting groove 2 inner wall bottom is equipped with rectangle bottom plate 20, the top of rectangle bottom plate 20 is equipped with weighing sensor 8, weighing sensor 8's detection end offsets with the bottom of rectangle roof 70, detect electric boiler body 3's overall weight through weighing sensor 8, when electric boiler body 3's water reduces gradually, when weighing sensor 8 detects electric boiler body 3's overall weight and reaches the threshold value of setting, prevent dry combustion method controller 4 control water pump 10, solenoid valve 12, warning light 50 and buzzer 51, simultaneously control boiler controller 30 closes electric boiler work, make water pump 10 will be carried in the boiler 3 in the water tank 6 boiler 3 and the water of high condition of drying out because the water is reduced and the condition of the excessive dry combustion method is avoided appearing;
the top of electric boiler body 3 and the position that is close to the front side are equipped with electric boiler controller 30 and prevent dry combustion method controller 4, electric boiler controller 30 control electric boiler work, prevent that dry combustion method controller 4 can control electric boiler controller 30 work, the top of storage water tank 6 and the position that is close to the left side are equipped with water pump 10, the input of water pump 10 communicates with storage water tank 6 through the drinking-water pipe, the output of water pump 10 is connected with water supply pipe 11, be equipped with solenoid valve 12 on the water supply pipe 11, avoid appearing the condition that water overflow in the electric boiler in the water supply pipe 11, the one end that water supply pipe 11 kept away from water pump 10 communicates with the inside boiler of electric boiler body 3, water pump 10 carries the water in the storage water tank 6 to with water supply pipe 11, and guide into the boiler through water supply pipe 11.
In this embodiment, the bottom of the base 1 and the positions near the four corners are all provided with the braked universal wheels 13, and the bottom of the base 1 and the positions near the middle parts of the four sides are all provided with the stabilizing components 9, so that the user can move and fix the electric boiler using the dry combustion device.
Specifically, stabilizing assembly 9 includes internal thread pipe 90, and the top of internal thread pipe 90 is equipped with mount pad 91, and mount pad 91 can dismantle the bottom of being connected in base 1 through the bolt, and internal thread pipe 90 internal thread is connected with screw thread bracing piece 92, and screw thread bracing piece 92's bottom rotation is connected with stripper plate 93, adjusts stripper plate 93's height through screw thread bracing piece 92, makes stripper plate 93 can offset with ground to stability when improving base 1 and placing, and then ensures electric boiler's stability.
Further, the top of the extrusion plate 93 and the position close to the outer edge are provided with a plurality of poking columns 930 which are distributed in an annular array, so that a user can rotate the extrusion plate 93, the bottom of the extrusion plate 93 is provided with an anti-slip pad 94, friction between the extrusion plate 93 and the ground is increased, and stability of the extrusion plate 93 against the ground is improved.
Further, the bottom of the rectangular positioning seat 7 and the positions close to the four corners are provided with circular inserting rods 71, the bottom of the inner wall of the positioning support groove 2 and the positions close to the four corners are provided with circular inserting grooves 21, and the four circular inserting rods 71 are movably inserted into the four circular inserting grooves 21 respectively, so that the stability of the rectangular positioning seat 7 is improved.
Further, the left side of the water storage tank 6 is vertically provided with a strip-shaped observation window 60, a user can check the residual water in the water storage tank 6 conveniently, the top of the water storage tank 6 is provided with a water injection pipe 61 with a valve close to the right side for injecting purified water into the water storage tank 6, the bottom of the right side of the water storage tank 6 is provided with a drain pipe 62 with a valve, and the water injection pipe is used for draining water in the water storage tank 6 when the dry burning preventing device is not used.
Further, the top of electric boiler body 3 and be close to the position of rear side and be equipped with alarm 5, be equipped with warning light 50 and bee calling organ 51 on the alarm 5, when preventing dry combustion method device start, send audible and visual alarm, effectively remind the staff that electric boiler appears unusual, need in time repair.
Further, the weighing sensor 8, the water pump 10, the electromagnetic valve 12, the warning lamp 50, the buzzer 51 and the electric boiler controller 30 are respectively and electrically connected with the dry burning prevention controller 4 through wires, when the weighing sensor 8 detects that the whole weight of the electric boiler body 3 reaches a set threshold value, the dry burning prevention controller 4 controls the water pump 10, the electromagnetic valve 12, the warning lamp 50 and the buzzer 51 to be started, and simultaneously controls the electric boiler controller 30 to close the electric boiler.
It should be noted that, the weighing sensor 8, the water pump 10, the electromagnetic valve 12, the warning lamp 50, the buzzer 51, the electric boiler controller 30 and the dry-heating preventing controller 4 in the utility model are all general standard components or components known to those skilled in the art, the structure and principle of the components are all known by those skilled in the art through technical manuals or known through routine experiment methods, specific connection means should refer to the sequence of operation of each electric component in the working principle to complete electric connection, detailed connection means are known in the art, and the above main description of the working principle and process are not described any more.
When the electric boiler anti-dry-heating device of the embodiment is used, a user pushes an electric boiler applying the electric boiler anti-dry-heating device to a required position, then stops four braked universal wheels 13, rotates four extrusion plates 93 respectively, and enables the extrusion plates 93 to be against the ground, so that stability of the base 1 is improved when the electric boiler is placed, then the electric boiler is well connected with a water pipe and used, the whole weight of the electric boiler body 3 can be detected through the weighing sensor 8, when the water in the electric boiler body 3 gradually decreases, the whole weight of the electric boiler body 3 can be reduced, when the weighing sensor 8 detects that the whole weight of the electric boiler body 3 reaches a set threshold value, the electric boiler anti-dry-heating controller 4 controls the water pump 10, the electromagnetic valve 12, the warning lamp 50 and the buzzer 51 to start, meanwhile, the electric boiler controller 30 is controlled to close the electric boiler to work, the water pump 10 conveys the water in the water tank 6 to the electric boiler body 3, the situation that the temperature is too low and dry-heating is continuously caused, when the electric boiler anti-dry-heating device is started, the sound warning lamp 50 and the buzzer 51 sends out sound and the alarm to effectively remind personnel that the electric boiler repair is needed.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an electric boiler prevents dry combustion method device, includes base (1), its characterized in that: a positioning supporting groove (2) and a water storage tank (6) are arranged at the top of the base (1), the water storage tank (6) is positioned at the rear side of the positioning supporting groove (2), the positioning supporting groove (2) is provided with an electric boiler body (3), the bottom of the electric boiler body (3) is provided with a rectangular positioning seat (7) movably inserted in the positioning supporting groove (2), a rectangular top plate (70) is arranged in the middle of the bottom of the rectangular positioning seat (7), a rectangular bottom plate (20) is arranged in the middle of the bottom of the inner wall of the positioning and supporting groove (2), the top of the rectangular bottom plate (20) is provided with a weighing sensor (8), the detection end of the weighing sensor (8) is propped against the bottom of the rectangular top plate (70), an electric boiler controller (30) and a dry burning prevention controller (4) are arranged at the top of the electric boiler body (3) and near the front side, a water pump (10) is arranged at the top of the water storage tank (6) and near the left side, the input end of the water pump (10) is communicated with the water storage tank (6) through a water suction pipe, the output end of the water pump (10) is connected with a water supply pipe (11), the water supply pipe (11) is provided with an electromagnetic valve (12), and one end of the water supply pipe (11) far away from the water pump (10) is communicated with a boiler inside the electric boiler body (3).
2. The dry combustion preventing apparatus of an electric boiler according to claim 1, wherein: the base is characterized in that the bottoms of the base (1) and the positions close to the four corners are respectively provided with a braked universal wheel (13), and the bottoms of the base (1) and the positions close to the middle parts of the four sides are respectively provided with a stabilizing component (9).
3. The dry combustion preventing apparatus of an electric boiler according to claim 2, wherein: the stabilizing assembly (9) comprises an internal thread pipe (90), a mounting seat (91) is arranged at the top end of the internal thread pipe (90), the mounting seat (91) is detachably connected to the bottom of the base (1) through a bolt, a thread support rod (92) is connected with the internal thread of the internal thread pipe (90), and an extrusion plate (93) is rotationally connected to the bottom end of the thread support rod (92).
4. The dry combustion preventing apparatus of an electric boiler according to claim 3, wherein: the top of the extrusion plate (93) and the position close to the outer edge are provided with a plurality of poking columns (930) which are distributed in an annular array, and the bottom of the extrusion plate (93) is provided with an anti-slip pad (94).
5. The dry combustion preventing apparatus of an electric boiler according to claim 1, wherein: the bottom of rectangle positioning seat (7) and be close to the position of four corners all be equipped with circular inserted bar (71), circular slot (21) have all been seted up to the bottom of locating support groove (2) inner wall and be close to the position of four corners, four circular inserted bar (71) are respectively movable grafting in four circular slot (21).
6. The dry combustion preventing apparatus of an electric boiler according to claim 1, wherein: the left side of storage water tank (6) is vertical be equipped with bar observation window (60), the top of storage water tank (6) and be close to the position on right side be equipped with water injection pipe (61) of taking the valve, the bottom on storage water tank (6) right side is equipped with drain pipe (62) of taking the valve.
7. The dry combustion preventing apparatus of an electric boiler according to claim 1, wherein: the electric boiler is characterized in that an alarm (5) is arranged at the top of the electric boiler body (3) and close to the rear side, and an alarm lamp (50) and a buzzer (51) are arranged on the alarm (5).
8. The dry combustion preventing apparatus of an electric boiler according to claim 7, wherein: the weighing sensor (8), the water pump (10), the electromagnetic valve (12), the warning lamp (50), the buzzer (51) and the electric boiler controller (30) are respectively and electrically connected with the dry burning prevention controller (4) through wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322993611.8U CN221099002U (en) | 2023-11-07 | 2023-11-07 | Dry burning preventing device for electric boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322993611.8U CN221099002U (en) | 2023-11-07 | 2023-11-07 | Dry burning preventing device for electric boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221099002U true CN221099002U (en) | 2024-06-07 |
Family
ID=91312072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322993611.8U Active CN221099002U (en) | 2023-11-07 | 2023-11-07 | Dry burning preventing device for electric boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221099002U (en) |
-
2023
- 2023-11-07 CN CN202322993611.8U patent/CN221099002U/en active Active
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