CN210399490U - Electric boiler at front end of heating system - Google Patents
Electric boiler at front end of heating system Download PDFInfo
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- CN210399490U CN210399490U CN201921313342.3U CN201921313342U CN210399490U CN 210399490 U CN210399490 U CN 210399490U CN 201921313342 U CN201921313342 U CN 201921313342U CN 210399490 U CN210399490 U CN 210399490U
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Abstract
The utility model relates to a heating front end electric boiler, which comprises a water tank and at least one group of heating components; the inside of the water tank is sealed; one end of the heating component is inserted into the water tank, and the other end of the heating component is connected with a water return pipe of the heating radiator set; the heating assembly is of a hollow double-layer heating pipe structure and comprises a conductive structure; the hollow part of the heating component is communicated with the water tank and the water return pipe; a heating layer is arranged between the double-layer pipe walls of the heating assembly, conducting rings are arranged at the upper end and the lower end of the heating layer respectively, and the upper conducting ring and the lower conducting ring are connected with two poles of a power supply respectively through two conducting structures. The utility model discloses it is fast to heat up, and the energy consumption is little, safe in utilization.
Description
Technical Field
The utility model relates to a heating technical field, concretely relates to heating front end electric boiler.
Background
The heating of the radiator is a traditional heating mode and is also the most widely applied heating mode at present. The central heating and the independent heating of the heating radiators are realized by heating and circulating the water medium in the heating radiators through a front-end boiler.
At present, central heating usually mainly adopts the mode heating of coal or gas, because heat supply area is big, and the transportation pipe diameter is many and complicated, and the loss is big, and required heat is many, and heat conversion efficiency is low, and the intensification is slow, for guaranteeing the heating heat, the energy resource consumption is big, and pollutes seriously.
Independent heating is used for families, and heat loss of the pipe diameter in central heating can be saved. Independent heating mainly adopts heat supply facilities such as gas hanging stove, electric boiler, distributed room heater, electric heat membrane heat supply, but the gas combustion rate is low, pollute big, the security is low, and electric heat conversion efficiency is low, and the energy consumption is big, and the structure is complicated, and occupation space is big, and uses and the maintenance cost is big. Meanwhile, the existing heating system has slow water circulation, low heat utilization rate and large heat loss; the heating facilities are slowly heated, some families have to select high-power heating facilities, even when no one is at home, most families can still keep the low-temperature operation of the high-power heating facilities, so that the high-power heating facilities can be heated to a comfortable temperature as soon as possible after the high-power heating facilities return home, the energy consumption is increased, the use cost is increased, and more space is occupied.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a heating installation front end electric boiler is used for improving the heat supply of radiator front end, and it is slow to solve the space intensification to a certain extent, and the energy consumption is big, heat utilization rate low grade problem.
In order to achieve the above object, the utility model provides a following technical scheme:
a heating front end electric boiler is characterized by comprising a water tank and at least one group of heating components; one end of the heating component is inserted into the water tank, and the other end of the heating component is connected with a water return pipe of the heating radiator set;
the heating assembly is of a hollow double-layer heating pipe structure and comprises a conductive structure; the hollow part of the inner layer of the heating component is communicated with the water tank and the water return pipe; a heating layer is arranged between the double-layer pipe walls of the heating assembly, conducting rings are arranged at the upper end and the lower end of the heating layer respectively, and the upper conducting ring and the lower conducting ring are connected with two poles of a power supply respectively through two conducting structures.
Further, the inside of the water tank is sealed; the heating layer is a carbon base layer growing or attached between the double-layer tube walls of the heating component.
Furthermore, the hollow double-layer heating pipe structure is formed by sleeving an inner heating pipe in an outer heating pipe; the heating assembly further comprises an upper fastener, a connecting piece and a lower fastener, and the heating assembly is fixed on the water tank through the upper fastener;
the outer-layer heating tube is arranged in the water tank, and the upper end and the lower end of the outer-layer heating tube are respectively connected with the upper fastening piece and the lower fastening piece in a sealing manner; the inner heating tube is sleeved in the outer heating tube, the upper end of the inner heating tube is hermetically nested at the lower end of the connecting piece, and the lower end of the inner heating tube is hermetically nested in a hollow groove of the lower fastening piece; the upper end of the connecting piece penetrates through the upper fastening piece to be connected with the water return pipe.
Furthermore, the conducting structure comprises an outer electrode contact ring, an inner electrode contact ring, parallel conducting rods and conducting bars, wherein the outer electrode contact ring and the inner electrode contact ring are tightly attached to the conducting rings at the upper end and the lower end of the outer heating tube and the upper end and the lower end of the inner heating tube respectively, the outer electrode contact ring and the inner electrode contact ring are electrically connected in parallel through the conducting bars, and the conducting bars are connected with the two poles of the power supply through the parallel conducting rods respectively.
Further, the upper fastener includes a first sealing ring and the connector includes a second sealing ring; the upper end and the lower end of the outer layer heating tube are respectively connected with the upper fastening piece and the lower fastening piece in a sealing way through two first sealing rings; the upper end and the lower end of the inner heating tube are respectively in sealing connection with the connecting piece and the lower part fastener through two second sealing rings.
Further, the heating layer is arranged on the inner wall of the outer layer heating tube and the outer wall of the inner layer heating tube; the conducting rings are respectively arranged on the heating layers at the upper and lower ends of the outer heating tube and the inner heating tube.
Furthermore, the electric boiler further comprises a water replenishing pipe and a water guide pipe, the water tank is connected with the water inlet pipe through the water replenishing pipe, and the water tank is connected with the water inlet waterway of the heating radiator set through the water guide pipe.
Furthermore, the water replenishing pipe is connected with the water tank sequentially through a water replenishing pipe overhauling valve and a water replenishing pipe electricity-proof wall.
Furthermore, the water guide pipe is connected with the water tank sequentially through the water guide pipe overhauling valve and the water guide pipe electricity-proof wall.
Further, electric boiler still includes the shunt tubes, the multiunit heating element respectively with the shunt tubes links to each other, the shunt tubes loop through circulating water pump, check valve, wet return service valve and wet return prevent that the electric wall with the wet return links to each other.
The utility model has the advantages that:
the utility model discloses simple structure, it is small, use and maintenance cost are low, also can freely increase and decrease the volume according to independent or collective heating. The two ends of the heating component are sealed, the middle part of the heating component is flushed with water, and the heating component continuously preheats return water in the heating process, so that the heating time of water in the water tank is shortened; hot water is rapidly circulated into the radiator set through the circulating water pump, so that the purpose of rapid heating is achieved; through preventing multiple anticreep short circuit structure or material such as electric wall, sealing washer, insulating material, guaranteed the utility model discloses the security of using. Furthermore, the utility model discloses a heating element thermoelectric conversion efficiency is high, and the energy consumption is little, and it is rapid to heat up, and it passes through the far infrared radiant heat, and it is luminous not to produce the naked light, and is safe in utilization and pollution-free, through circuit special design, still can be under low voltage or the operation of direct current voltage, has reduced power consumption equally.
Drawings
FIG. 1 is a schematic structural view of a front-end electric boiler of a heating system of the present invention;
FIG. 2 is a left side view of the electric boiler at the front end of the heating system of the present invention;
FIG. 3 is a schematic structural view of a heating assembly of the present invention;
fig. 4 is a far infrared ray wavelength range curve of the novel nano-carbon material of the present invention.
Wherein, 1, a shell; 1.1, a door body; 1.2, a control area; 2. a water tank; 3. a heating assembly; 3.1, an outer heating tube; 3.2, an inner heating tube; 3.3, an outer electrode contact ring; 3.4, an inner layer electrode connecting ring; 3.5, connecting conducting rods in parallel; 3.6, upper fasteners; 3.6.1, a first hole; 3.6.2, a first groove; 3.6.3, a first seal ring; 3.7, screw thread; 3.8, a protective cover; 3.8.1, a second hole; 3.9, connecting pieces; 3.9.1, a second seal ring; 3.10, large nut; 3.11, a long screw rod; 3.12, lower fasteners; 3.12.1, a second groove; 3.12.2, a hollow groove; 4. a water return pipe; 4.1, a circulating water pump; 4.2, check valve; 4.3, a water return pipe maintenance valve; 4.4, a water return pipe electricity-proof wall; 5. a shunt tube; 6. a water replenishing pipe; 6.1, a water replenishing pipe maintenance valve; 6.2, a water replenishing pipe electricity-proof wall; 7. a water conduit; 7.1, a water guide pipe maintenance valve; 7.2, a water guide pipe electricity-proof wall; 8. a temperature sensor.
Detailed Description
The following description will be made in detail with reference to the accompanying drawings and examples. The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.
In the present specification, terms of orientation or positional relationship such as up, down, left, right, inside, outside, front, rear, head, and tail are established based on the orientation or positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.
The present invention relates to a portable electronic device, and more particularly, to a portable electronic device, which can be connected to a portable electronic device, and can be connected to a portable electronic device through a connection structure, such as a connector, a. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present embodiment describes a heating front end electric boiler, which comprises a casing 1, a water tank 2 and a heating assembly 3, as shown in fig. 1 and 2. The water tank 2 and the heating assembly 3 are respectively installed in the housing 1.
The shell 1 is provided with a door body 1.1 and an operation area 1.2, and the door body 1.1 can open the shell 1 so as to facilitate the internal inspection and maintenance of the electric boiler. The control area 1.2 is internally provided with a key and a display screen for realizing the operation of the electric boiler and displaying operation parameters and the like.
The water tank 2 is internally sealed to form a heating cavity. One end of the heating component 3 is inserted into the water tank 2, the other end is communicated with the shunt pipe 5, the multiple groups of heating components 3 are connected in parallel through the shunt pipe 5, and the shunt pipe 5 is connected with the return water pipe 4. The water tank 2 is respectively connected with the water replenishing pipe 6 and the water guide pipe 7, a temperature sensor 8 is further arranged in the water tank 2, the water temperature is detected in real time, and the water temperature is displayed in the control area 1.2.
The heating component 3 is a hollow double-layer heating tube structure formed by an outer heating tube 3.1 and an inner heating tube 3.2, as shown in fig. 3. The outer heating tube 3.1 and the inner heating tube 3.2 are made of insulating high-temperature resistant materials, and the insulating high-temperature resistant materials can be one of ceramic tubes, quartz glass tube materials and the like. Have the layer that generates heat respectively on outer heating tube 3.1's inner wall and inlayer heating tube 3.2's outer wall, the layer that generates heat is direct growth or the carbon-based layer of attaching to on outer heating tube 3.1 inner wall and inlayer heating tube 3.2 outer wall, carbon-based layer can be made by any kind of novel nano carbon material in graphite alkene material, graphite, glassy carbon, the conductive carbon black, generate heat and pass through the far infrared radiant heat behind the layer circular telegram, as shown in figure 4, it does not produce the naked light to give out light, and thermoelectric conversion efficiency is high, it is fast to heat up, do not oxidize under the long-time heating condition, do not fracture, there is not decay in the heating effect, the security is high and pollution-free. Meanwhile, the voltage of 220V is normally used without being influenced even under the unstable voltage condition, and the power supply voltage is only required to be adjusted and can also be used under low voltage or direct current voltage, so that the power consumption is low.
Preferably, the carbon-based layer grown or attached on the inner wall of the outer heating tube 3.1 and the outer wall of the inner heating tube 3.2 is a carbon-based layer prepared from graphene. Graphene can be directly grown on the inner wall of the outer heating tube 3.1 and the outer wall of the inner heating tube 3.2 by a chemical vapor deposition method.
The heating layers of the upper and lower ports of the outer heating tube 3.1 and the inner heating tube 3.2 are respectively provided with conductive silver paste. Conductive silver paste at the upper end and the lower end of the outer heating tube 3.1 are respectively clung to two outer electrode contact rings 3.3, conductive silver paste at the upper end and the lower end of the inner heating tube 3.2 are respectively clung to two inner electrode contact rings 3.4, the outer electrode contact rings 3.3 are connected with the inner electrode contact rings 3.4 through bus bars, the bus bars at the upper end and the lower end respectively pass through the upper fastening piece 3.6 for fixation through two parallel conductive rods 3.5, the two poles of the power are respectively connected, so that the heating layer on the inner wall of the outer heating tube 3.1 and the heating layer on the outer wall of the inner heating tube 3.2 form an electric parallel connection, a group of electrodes can be commonly used, and the two parallel conductive rods 3.5.
A first hole 3.6.1 is arranged in the middle of the upper fastening piece 3.6, and a first groove 3.6.2 is arranged at the bottom of the upper fastening piece 3.6. The first sealing ring 3.6.3 is arranged on the outer heating tube 3.1, the two are nested in the first groove 3.6.2 together, and the first sealing ring 3.6.3 can ensure the sealing between the outer heating tube 3.1 and the first groove 3.6.2. The lower extreme card of connecting piece 3.9 is at first hole 3.6.1 lower extreme, and second sealing washer 3.9.1 sets up on inlayer heating tube 3.2, and the two overlaps jointly inlays the lower extreme at connecting piece 3.9, and the sealing connection between inlayer heating tube 3.2 and connecting piece 3.9 can be guaranteed to second sealing washer 3.9.1.
Still be equipped with internal thread and external screw thread 3.7 respectively at upper and lower both ends of upper portion fastener 3.6, through the internal thread of upper portion fastener 3.6 upper end and the external screw thread 3.7 of visor 3.8 lower extreme, can be with visor 3.8 threaded connection on upper portion fastener 3.6, external screw thread 3.7 of upper portion fastener 3.6 lower extreme is used for being fixed with 2 threaded connection of water tank.
A second hole 3.8.1 corresponding to the outer diameter of the upper end of the connecting piece 3.9 is arranged in the middle of the protective cover 3.8, the upper end of the connecting piece 3.9 sequentially passes through the first hole 3.6.1 and the second hole 3.8.1 to be connected with the shunt tube 5, the upper end of the connecting piece 3.9 is provided with a thread, the large nut 3.10 is sleeved on the upper end of the connecting piece 3.9, and the connecting piece 3.9 is fastened and connected on the upper fastening piece 3.6 by the downward rotation of the large nut 3.10. Two small holes are also arranged on the protective cover 3.8, and leads for connecting the two poles of the power supply penetrate through and are connected with the parallel conducting rod 3.5. In the embodiment, the outer diameter of the lower end of the connecting piece 3.9 is larger than that of the upper end, and the inner diameter of the upper end is the same as that of the inner-layer heating tube 3.2.
The lower fastener 3.12 is provided with a second groove 3.12.1 and a hollow groove 3.12.2, and the middle of the hollow groove 3.12.2 is provided with a through hole with the same outer diameter as that of the inner heating tube 3.2. The lower ends of the outer heating tube 3.1 and the inner heating tube 3.2 are respectively provided with a first sealing ring 3.6.3 and a second sealing ring 3.9.1, the lower end of the outer heating tube 3.1 and the first sealing ring 3.6.3 are nested in a second groove 3.12.1 of the lower fastening piece 3.12, the lower end of the inner heating tube 3.2 and the second sealing ring 3.9.1 are nested in a hollow groove 3.12.2 of the lower fastening piece 3.12, and the first sealing ring 3.6.3 and the second sealing ring 3.9.1 are used for realizing the sealing of the outer heating tube 3.1 and the inner heating tube 3.2 with the lower fastening piece 3.12 respectively.
The upper fastening piece 3.6 and the lower fastening piece 3.12 are fastened and connected through a plurality of long screws 3.11, so that the outer heating tube 3.1, the inner heating tube 3.2, the upper fastening piece 3.6, the connecting piece 3.9, the first sealing ring 3.6.3, the second sealing ring 3.9.1 and the lower fastening piece 3.12 are sealed and integrated. Thereby realizing the purposes of sealing two ends of the heating component 3 and passing water in the middle.
In this embodiment, the upper fastening member 3.6, the connecting member 3.9 and the lower fastening member 3.12 are made of non-brittle, insulating and high temperature resistant materials, and may be selected from high temperature resistant plastic materials or materials with the same performance as the high temperature resistant plastic materials.
The shunt pipe 5 is connected with one end of the return pipe 4 sequentially through a check valve 4.2 of a circulating water pump 4.1, a return pipe overhaul valve 4.3 and a return pipe electricity-proof wall 4.4, and the other end of the return pipe 4 is connected with a radiator group. The water in the water return pipe 4 can be sucked into the shunt pipe 5 through the circulating water pump 4.1 so as to accelerate the water circulation in the heating radiator group. The check valve 4.2 can prevent the water in the shunt pipe 5 from flowing back to the water return pipe 4. And a circulating water pump 4.1, a check valve 4.2, a return pipe service valve 4.3 and a return pipe electricity-proof wall 4.4 are all arranged in the shell 1.
The inlet tube is connected to moisturizing pipe 6 one end, and the other end loops through moisturizing pipe service valve 6.1 and moisturizing pipe electricity-proof wall 6.2 and links to each other with water tank 2 for water supply in to water tank 2 guarantees the water pressure among the heating system.
One end of the water guide pipe 7 is connected with a water inlet waterway of the radiator group, and the other end of the water guide pipe is connected with the water tank 2 through the water guide pipe overhaul valve 7.1 and the water guide pipe electricity-proof wall in sequence, so that hot water in the water tank 2 is conveyed into the water inlet waterway of the radiator group.
In the embodiment, the water return pipe overhaul valve 4.3, the water replenishing pipe overhaul valve 6.1 and the water guide pipe overhaul valve 7.1 are used for controlling water flow or draining when the electric boiler operates or is overhauled so as to achieve the aim of convenient overhaul; the function of the water return pipe electricity-proof wall 4.4, the water replenishing pipe electricity-proof wall 6.2 and the water guide pipe electricity-proof wall 7.2 is to prevent the electricity leakage generated during the operation of the electric boiler from damaging the human body.
When the electric boiler operates, the circulating water pump 4.1 sucks backflow water in the water return pipe 4 into the shunt pipe 5, the water pressure in the shunt pipe 5 is increased, the backflow water is forced to flow into the water tank 2 through each heating component 3, the backflow water is preheated by the inner heating pipe 3.2 when flowing through the heating component 3, and the backflow water is continuously heated to a preset temperature by the outer heating pipe 3.1 after flowing into the water tank 2. Then hot water reaching the preset temperature enters a water inlet waterway of the radiator set through the water guide pipe 7, and the radiator is used for radiating heat to realize the heating function. Under the action of the circulating water pump 4.1, water flows back to the shunt pipe 5, the water pressure in the water return pipe 4 is reduced, and water in each heating radiator group is supplemented into the water return pipe 4, so that forced convection is formed, and hot water in the water tank 2 is circulated in the heating radiator groups for continuous heating. When the water pressure in the electric boiler is lower, water can be supplemented into the water tank 2 through the water supplementing pipe 6.
The heating elements 3 of this embodiment can determine the number and specification (i.e. pipe diameter, length, thickness of the heating layer, etc.) according to the heating space and temperature, and can realize the front heating of the radiator group in the independent heating and the central heating.
While the principles of the invention have been described in detail in connection with the preferred embodiments thereof, it will be understood by those skilled in the art that the above-described embodiments are merely illustrative of exemplary implementations of the invention and are not limiting of the scope of the invention. The details in the embodiments do not constitute the limitations of the scope of the present invention, and any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the present invention all fall within the protection scope of the present invention without departing from the spirit and scope of the present invention.
Claims (10)
1. Electric boiler in front of heating system, characterized in that it comprises a water tank (2) and at least one set of heating elements (3); one end of the heating component (3) is inserted into the water tank (2), and the other end of the heating component is connected with a water return pipe (4) of the heating radiator set;
the heating assembly (3) is of a hollow double-layer heating pipe structure, and the heating assembly (3) comprises a conductive structure; the hollow part of the inner layer of the heating component (3) is communicated with the water tank (2) and the water return pipe (4); and a heating layer is arranged between the double-layer pipe walls of the heating component (3), the upper end and the lower end of the heating layer are respectively provided with a conducting ring, and the upper conducting ring and the lower conducting ring are respectively connected with two poles of a power supply through two conducting structures.
2. A heating front-end electric boiler according to claim 1, characterized in that the water tank (2) is internally sealed; the heating layer is a carbon base layer growing or attached between the double-layer tube walls of the heating component (3).
3. A heating front-end electric boiler according to claim 1, characterized in that the hollow double-layer heating pipe structure is formed by an outer heating pipe (3.1) and an inner heating pipe (3.2) which are internally connected; the heating assembly (3) further comprises an upper fastening piece (3.6), a connecting piece (3.9) and a lower fastening piece (3.12), and the heating assembly (3) is fixed on the water tank (2) through the upper fastening piece (3.6);
the outer-layer heating tube (3.1) is arranged in the water tank (2), and the upper end and the lower end of the outer-layer heating tube (3.1) are respectively connected with the upper fastening piece (3.6) and the lower fastening piece (3.12) in a sealing way; the inner heating tube (3.2) is sleeved in the outer heating tube (3.1), the upper end of the inner heating tube (3.2) is hermetically nested at the lower end of the connecting piece (3.9), and the lower end of the inner heating tube (3.2) is hermetically nested in a hollow groove (3.12.2) of the lower fastening piece (3.12); the upper end of the connecting piece (3.9) penetrates through the upper fastening piece (3.6) to be connected with the water return pipe (4).
4. A heating front end electric boiler according to claim 3, characterized in that said conductive structure comprises an outer electrode contact ring (3.3), an inner electrode contact ring (3.4), parallel conductive rods (3.5) and conductive strips, two of said outer electrode contact rings (3.3) and two of said inner electrode contact rings (3.4) are respectively tightly attached to said conductive rings at the upper and lower ends of said outer heating tube (3.1) and the upper and lower ends of said inner heating tube (3.2), said outer electrode contact rings (3.3) and said inner electrode contact rings (3.4) are electrically connected in parallel by said conductive strips, and two of said conductive strips are respectively connected to two poles of said power supply by said parallel conductive rods (3.5).
5. Heating front end electric boiler according to claim 3, characterized in that the upper fastening (3.6) comprises a first sealing ring (3.6.3), the connection (3.9) comprises a second sealing ring (3.9.1); the upper end and the lower end of the outer layer heating tube (3.1) are respectively connected with the upper fastening piece (3.6) and the lower fastening piece (3.12) in a sealing way through two first sealing rings (3.6.3); the upper end and the lower end of the inner layer heating tube (3.2) are respectively connected with the connecting piece (3.9) and the lower fastening piece (3.12) in a sealing way through two second sealing rings (3.9.1).
6. A heating front end electric boiler according to claim 3, characterized in that the heat generating layer is arranged on the inner wall of the outer heating tube (3.1) and the outer wall of the inner heating tube (3.2); the conducting rings are respectively arranged on the heating layers at the upper and lower ends of the outer layer heating tube (3.1) and the inner layer heating tube (3.2).
7. A heating front end electric boiler according to claim 1, characterized in that, the electric boiler further comprises a water replenishing pipe (6) and a water guiding pipe (7), the water tank (2) is connected with a water inlet pipe through the water replenishing pipe (6), and the water tank (2) is connected with a water inlet waterway of the heating radiator set through the water guiding pipe (7).
8. Heating front end electric boiler according to claim 7, characterized in that the water supply pipe (6) is connected to the water tank (2) in turn via a water supply pipe service valve (6.1) and a water supply pipe electricity-proof wall (6.2).
9. Heating front end electric boiler according to claim 7, characterized in that the water manifold (7) is connected to the water tank (2) in turn via a manifold service valve (7.1) and a manifold electricity protection wall (7.2).
10. A heating front-end electric boiler according to claim 1, characterized in that the electric boiler further comprises a shunt tube (5), a plurality of groups of the heating components (3) are respectively connected with the shunt tube (5), and the shunt tube (5) is connected with the return pipe (4) sequentially through a circulating water pump (4.1), a check valve (4.2), a return pipe service valve (4.3) and a return pipe electricity-proof wall (4.4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921313342.3U CN210399490U (en) | 2019-08-14 | 2019-08-14 | Electric boiler at front end of heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921313342.3U CN210399490U (en) | 2019-08-14 | 2019-08-14 | Electric boiler at front end of heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210399490U true CN210399490U (en) | 2020-04-24 |
Family
ID=70359825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921313342.3U Expired - Fee Related CN210399490U (en) | 2019-08-14 | 2019-08-14 | Electric boiler at front end of heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210399490U (en) |
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2019
- 2019-08-14 CN CN201921313342.3U patent/CN210399490U/en not_active Expired - Fee Related
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Granted publication date: 20200424 Termination date: 20210814 |