CN214038605U - Electric heating device of electric fireplace - Google Patents
Electric heating device of electric fireplace Download PDFInfo
- Publication number
- CN214038605U CN214038605U CN202023007547.4U CN202023007547U CN214038605U CN 214038605 U CN214038605 U CN 214038605U CN 202023007547 U CN202023007547 U CN 202023007547U CN 214038605 U CN214038605 U CN 214038605U
- Authority
- CN
- China
- Prior art keywords
- water tank
- electric
- tank shell
- water
- fixedly mounted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005485 electric heating Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 239000000919 ceramic Substances 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 claims abstract description 21
- 239000010949 copper Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 10
- 238000009835 boiling Methods 0.000 abstract description 7
- 230000005494 condensation Effects 0.000 abstract description 7
- 238000009833 condensation Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 abstract description 2
- 239000008236 heating water Substances 0.000 abstract description 2
- 238000013021 overheating Methods 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 description 8
- 229910010293 ceramic material Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 208000021760 high fever Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Resistance Heating (AREA)
Abstract
The utility model discloses an electric fireplace electric heating device, which comprises a base, wherein a heating wire is used for heating water, and then steam is used for condensation to release heat, the temperature of the whole heating process device is controlled below the boiling point of water, thereby reducing the risk of fire, meanwhile, a water tank shell is provided with a pressure sensor and a temperature sensor, when the internal pressure and the temperature of the water tank shell reach set thresholds, a switch is controlled to stop the heating wire, thereby avoiding the high pressure and the overheating of the electric heating device from explosion, the use is safer, a plurality of groups of copper pipes are evenly arranged on the radiating pipe, on one hand, the surface area of the inner wall of the radiating pipe is increased, the steam is convenient to condense, on the other hand, the surface area of the outer part of the radiating pipe is increased, the radiating efficiency of the electric fireplace is improved, meanwhile, when the electric fireplace is stopped, the temperature reduction range of the water in a ceramic liner is very small, when the electric fireplace is used next time, the water in the ceramic liner does not need to be preheated, the energy consumption is reduced, and the heating efficiency is higher.
Description
Technical Field
The utility model relates to an electric fireplace technical field specifically is an electric fireplace electric heating device.
Background
The electric fireplace replaces fuel with electric heating, combines with the European traditional fireplace manufacturing process to produce a modern heating device, and the electric fireplace heating is realized by an electric heating device inside the electric fireplace.
The conventional electric fireplace electric heating device is heated by the electric heating pieces, the temperature of the electric heating pieces is too high, so that the safety is not high enough, certain electric safety hidden dangers can be brought, and meanwhile, the existing electric heating device is low in heating efficiency and not environment-friendly and energy-saving enough.
Therefore, an electric heating device of the electric fireplace is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric fireplace electric heating device to propose conventional electric fireplace electric heating device and heating using the electric heat piece in solving above-mentioned background art, the high temperature of electric heat piece, therefore the security is not high enough, can bring certain power consumption potential safety hazard, and the electric heating device that has now simultaneously heats efficiency lower, environmental protection and energy saving's problem inadequately.
In order to achieve the above object, the utility model provides a following technical scheme: an electric fireplace electric heating device comprises a base, wherein a control switch is fixedly installed on the front surface of the base, a fan is fixedly installed on the left side of the base, a water tank shell is fixedly installed above the base, a radiating pipe is fixedly installed on the left side of the water tank shell, a top cover is fixedly installed at the top end inside the water tank shell, a pressure sensor is fixedly installed at the bottom of the top cover, a cover plate is movably installed at the bottom of the pressure sensor, a ceramic inner container is fixedly installed below the cover plate, a temperature sensor is fixedly installed inside the ceramic inner container, a heating wire is fixedly installed at the bottom end of the temperature sensor, a communicating valve is fixedly installed at the bottom end of the radiating pipe, a connecting frame is arranged between the water tank shell and the ceramic inner container, a connecting frame is fixedly connected onto a vacuum cavity, and a copper pipe is fixedly installed on the radiating pipe, the control switch is electrically connected with an external power supply.
By adopting the technical scheme, water is arranged in the water tank shell, the electric heating wire heats the water, the water generates steam after being heated, the high-heat steam is condensed and releases heat on the inner walls of the radiating pipe and the copper pipe, the high-heat steam is liquefied into water drops and then returns to the inside of the water tank shell, warm air can be obtained by blowing the radiating pipe through the fan, the indoor air is heated, the temperature in the whole heating process does not exceed the boiling point of the water, meanwhile, the water tank shell is provided with the pressure sensor and the temperature sensor, when the internal pressure and the temperature of the water tank shell reach set threshold values, the electric heating wire is controlled to be turned off by the control switch, the use is safer, meanwhile, when the electric fireplace is turned off, a plurality of groups of communication valves and the ceramic inner container are both closed, the ceramic inner container is made of ceramic materials with poor heat conduction, a vacuum layer is arranged between the ceramic inner container and the water tank shell, the heat loss in the ceramic inner container is further reduced, and therefore, when the electric fireplace is turned off, the temperature reduction range of water in the ceramic inner container is very small, and when the ceramic inner container is used next time, the water in the ceramic inner container is not required to be preheated, so that the energy consumption is reduced, and the heating efficiency is higher.
Preferably, the cooling tube is provided with a plurality of groups, and the left and right sides at the water tank shell is installed respectively to a plurality of groups cooling tube, the fan is provided with four groups altogether, and wherein two sets of fans are evenly installed in the left side of base, and other two sets of fans are evenly installed on the right side of base.
Through adopting above-mentioned technical scheme, the cooling tube is the good material of thermal conductivity, can deliver the heat that the device that generates heat produced, and the rethread fan blows the cooling tube and can obtain the warm braw, for the room air heating.
Preferably, a plurality of groups of copper pipes are uniformly arranged on the radiating pipe, and the radiating pipe and the copper pipes are of hollow structures.
Through adopting above-mentioned technical scheme, the inside cavity of cooling tube and copper pipe, the vapor of high fever is exothermic at the inner wall condensation of cooling tube and copper pipe, and the inside of getting back to the water tank shell after the liquefaction becomes the water droplet, through setting up a plurality of groups copper pipe, has increased cooling tube inner wall surface area on the one hand, makes things convenient for the vapor condensation, and on the other hand has increased the outside surface area of cooling tube, makes things convenient for the more quick heat dissipation of cooling tube, improves electric fireplace's availability factor.
Preferably, the communication valves are provided with a plurality of groups, the groups of communication valves are respectively installed at the bottom ends of the groups of s radiating pipes, and the cover plate is connected with the ceramic inner container in a clamping manner.
Through adopting above-mentioned technical scheme, when electric fireplace shut down, a plurality of groups of UNICOM valve and ceramic inner bag all close, and the ceramic inner bag is the poor ceramic material of heat conduction, sets up one deck vacuum layer between ceramic inner bag and the water tank shell, further reduces the inside calorific loss of ceramic inner bag to when making electric fireplace close, the temperature reduction range of ceramic inner bag water is very little, when using next time, need not to preheat the water in the ceramic inner bag, reduces the energy consumption, and the heating efficiency is higher.
Preferably, the water tank shell is of a closed structure.
Through adopting above-mentioned technical scheme, the inside water that is provided with of water tank shell, the heating wire adds hot water, utilizes the liquefaction of vapor to disperse the heat to make whole heating process temperature no longer than the boiling point of water, water tank shell is provided with pressure sensor and temperature sensor simultaneously, reaches the settlement threshold value when water tank shell internal pressure and temperature, and control switch closes the heating wire, uses safelyr.
Preferably, the electric heating wire is in a spiral structure.
Through adopting above-mentioned technical scheme, improved the area of contact of heating wire with water to heating effect is better, and rate of heating is faster.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the electric heating wire is used for heating water, and then the water vapor is used for condensation and heat release, the temperature of the whole heating process device is controlled below the boiling point of the water, so that the risk of fire is reduced, meanwhile, the pressure sensor and the temperature sensor are arranged on the water tank shell, when the internal pressure and temperature of the water tank shell reach set thresholds, the switch is controlled to stop the electric heating wire, the explosion caused by high pressure and overheating of the electric heating device is avoided, and the use is safer;
2. evenly install a plurality of groups copper pipe on the cooling tube, radiating tube inner wall surface area has been increased on the one hand, make things convenient for the vapor condensation, on the other hand has increased the outside surface area of cooling tube, make things convenient for the more quick heat dissipation of cooling tube, improve electric fireplace radiating efficiency, when electric fireplace is shut down simultaneously, the temperature reduction range of water in the ceramic inner bag is very little, when using next time, need not to preheat the water in the ceramic inner bag, reduce the energy consumption, the heating efficiency is higher.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
FIG. 2 is a view of the internal structure of the tank case according to the present invention;
FIG. 3 is a connection diagram of the ceramic inner container and the water tank shell of the utility model;
fig. 4 is a schematic view of the structure of the heat dissipation tube of the present invention.
In the figure: 1. a radiating pipe; 2. a water tank housing; 3. a base; 4. a control switch; 5. a fan; 6. a pressure sensor; 7. a top cover; 8. a ceramic inner container; 9. a temperature sensor; 10. an electric heating wire; 11. a communication valve; 12. a cover plate; 13. a connecting frame; 14. a vacuum chamber; 15. copper tubing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: an electric fireplace electric heating device is shown in figures 1 to 4 and comprises a base 3, a control switch 4 is fixedly installed on the front surface of the base 3, a fan 5 is fixedly installed on the left side of the base 3, a water tank shell 2 is fixedly installed above the base 3, a radiating pipe 1 is fixedly installed on the left side of the water tank shell 2, a top cover 7 is fixedly installed at the top end inside the water tank shell 2, a pressure sensor 6 is fixedly installed at the bottom of the top cover 7, a cover plate 12 is movably installed at the bottom of the pressure sensor 6, a ceramic inner container 8 is fixedly installed below the cover plate 12, a temperature sensor 9 is fixedly installed inside the ceramic inner container 8, an electric heating wire 10 is fixedly installed at the bottom end of the temperature sensor 9, a communicating valve 11 is fixedly installed at the bottom end of the radiating pipe 1, a vacuum cavity 14 is arranged between the water tank shell 2 and the ceramic inner container 8, and a connecting frame 13 is fixedly connected on the vacuum cavity 14, the radiating tube 1 is fixedly provided with a copper tube 15, and the control switch 4 is electrically connected with an external power supply.
By adopting the technical scheme, water is arranged in the water tank shell 2, the heating wire 10 heats the water, the water generates steam after being heated, the high-temperature steam is condensed and releases heat on the inner walls of the radiating pipe 1 and the copper pipe 15 and returns to the inside of the water tank shell 2 after being liquefied into water drops, the radiating pipe 1 is blown by the fan 5 to obtain warm air for heating indoor air, the temperature in the whole heating process is not more than the boiling point of the water, meanwhile, the water tank shell 2 is provided with the pressure sensor 6 and the temperature sensor 9, when the internal pressure and the temperature of the water tank shell 2 reach set threshold values, the control switch 4 turns off the heating wire 10, the use is safer, meanwhile, when the electric fireplace is turned off, a plurality of groups of communication valves 11 and the ceramic inner container 8 are both turned off, the ceramic inner container 8 is made of ceramic material with poor heat conduction, a vacuum layer is arranged between the ceramic inner container 8 and the water tank shell 2, and the heat loss in the ceramic inner container 8 is further reduced, therefore, when the electric fireplace is closed, the temperature reduction range of the water in the ceramic liner 8 is very small, the water in the ceramic liner 8 does not need to be preheated when the electric fireplace is used next time, the energy consumption is reduced, and the heating efficiency is higher.
Specifically, as shown in fig. 1, the heat dissipation pipes 1 are provided with a plurality of groups, the heat dissipation pipes 1 are respectively installed on the left and right sides of the water tank housing 2, the fans 5 are provided with four groups, wherein two groups of fans 5 are uniformly installed on the left side of the base 3, and the other two groups of fans 5 are uniformly installed on the right side of the base 3.
Through adopting above-mentioned technical scheme, cooling tube 1 is the good material of heat conductivity, can deliver the heat that the device that generates heat produced, and rethread fan 5 blows cooling tube 1 and can obtain the warm braw, for the room air heating.
Specifically, as shown in fig. 4, a plurality of groups of copper tubes 15 are uniformly installed on a group of heat dissipation tubes 1, and the heat dissipation tubes 1 and the copper tubes 15 are both hollow structures.
Through adopting above-mentioned technical scheme, the inside cavity of cooling tube 1 and copper pipe 15, the vapor of high fever is exothermic at the inner wall condensation of cooling tube 1 and copper pipe 15, get back to water tank shell 2's inside behind the liquefaction one-tenth water droplet, through setting up a plurality of copper pipes of group 15, increased 1 inner wall surface areas of cooling tube on the one hand, make things convenient for the vapor condensation, on the other hand has increased 1 outside surface areas of cooling tube, make things convenient for the more quick heat dissipation of cooling tube 1, improve electric fireplace's availability factor.
Specifically, as shown in fig. 2 and 3, the communication valves 11 are provided with a plurality of groups, the groups of communication valves 11 are respectively installed at the bottom ends of the groups of radiating pipes 1, and the cover plate 12 is connected with the ceramic inner container 8 in a clamping manner.
Through adopting above-mentioned technical scheme, when the electric fireplace was shut down, a plurality of groups of UNICOM valve 11 and ceramic inner bag 8 all closed, ceramic inner bag 8 is the poor ceramic material of heat conduction, set up one deck vacuum layer between ceramic inner bag 8 and the water tank shell 2, further reduce the inside loss of heat of ceramic inner bag 8, thereby when making the electric fireplace close, the temperature reduction range of the water in the ceramic inner bag 8 is very little, when using next time, need not to preheat the water in the ceramic inner bag 8, reduce the energy consumption, the heating efficiency is higher.
Specifically, as shown in fig. 1, the tank case 2 has a closed structure.
Through adopting above-mentioned technical scheme, 2 inside water tank shell are provided with water, and heating wire 10 adds hot water, utilizes the liquefaction of vapor to disperse the heat to make whole heating process temperature no longer than the boiling point of water, water tank shell 2 is provided with pressure sensor 6 and temperature sensor 9 simultaneously, reaches the settlement threshold when 2 internal pressure of water tank shell and temperature, and control switch 4 closes and stops heating wire 10, uses safelyr.
Specifically, as shown in fig. 2, the heating wire 10 has a coil structure.
By adopting the technical scheme, the contact area of the heating wire 10 and water is increased, so that the heating effect is better, and the heating speed is higher.
The model of the middle pressure sensor 6 of the utility model is QDW 90A-N;
the utility model discloses well temperature sensor 9's model is FTS-3.5R 20L.
The working principle is as follows: the water tank shell 2 is internally provided with water, the heating wire 10 heats the water, the water generates steam after being heated, the high-heat steam is condensed and releases heat on the inner walls of the radiating pipe 1 and the copper pipe 15, the high-heat steam returns to the inside of the water tank shell 2 after being liquefied into water drops, the radiating pipe 1 is blown by the fan 5 to obtain warm air, the air is heated for indoor air, the temperature in the whole heating process is not more than the boiling point of the water, meanwhile, the water tank shell 2 is provided with the pressure sensor 6 and the temperature sensor 9, when the internal pressure and the temperature of the water tank shell 2 reach set threshold values, the control switch 4 turns off the heating wire 10, the use is safer, meanwhile, when the electric fireplace is turned off, the plurality of groups of the communication valves 11 and the ceramic inner container 8 are both turned off, the ceramic inner container 8 is a ceramic material with poor heat conduction, a vacuum layer is arranged between the ceramic inner container 8 and the water tank shell 2, and the heat loss in the ceramic inner container 8 is further reduced, therefore, when the electric fireplace is closed, the temperature reduction range of the water in the ceramic liner 8 is very small, the water in the ceramic liner 8 does not need to be preheated when the electric fireplace is used next time, the energy consumption is reduced, and the heating efficiency is higher.
In the description of the present invention, it is to 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. An electric fireplace electric heating device comprises a base (3) and is characterized in that: the water tank is characterized in that a control switch (4) is fixedly mounted on the front surface of the base (3), a fan (5) is fixedly mounted on the left side of the base (3), a water tank shell (2) is fixedly mounted on the top of the base (3), a radiating pipe (1) is fixedly mounted on the left side of the water tank shell (2), a top cover (7) is fixedly mounted on the top end of the inside of the water tank shell (2), a pressure sensor (6) is fixedly mounted on the bottom of the top cover (7), a cover plate (12) is movably mounted on the bottom of the pressure sensor (6), a ceramic inner container (8) is fixedly mounted on the lower portion of the cover plate (12), a temperature sensor (9) is fixedly mounted on the inside of the ceramic inner container (8), a heating wire (10) is fixedly mounted on the bottom of the temperature sensor (9), and a communicating valve (11) is fixedly mounted on the bottom of the radiating pipe (1), vacuum cavity (14) have been seted up between water tank shell (2) and ceramic inner bag (8), fixedly connected with link (13) on vacuum cavity (14), fixed mounting has copper pipe (15) on cooling tube (1), control switch (4) and external power source electric connection.
2. An electric fireplace heater as defined in claim 1, wherein: the cooling tube (1) is provided with a plurality of groups, and the left and right sides in water tank shell (2) is installed respectively in a plurality of groups cooling tube (1), fan (5) are provided with four groups altogether, and wherein two sets of fans (5) are evenly installed in the left side of base (3), and the right side in base (3) is evenly installed in other two sets of fans (5).
3. An electric fireplace heater as defined in claim 1, wherein: a plurality of groups of copper pipes (15) are uniformly arranged on the radiating pipe (1), and the radiating pipe (1) and the copper pipes (15) are both of hollow structures.
4. An electric fireplace heater as defined in claim 1, wherein: the communication valves (11) are provided with a plurality of groups, the communication valves (11) are respectively arranged at the bottom ends of the radiating pipes (1), and the cover plate (12) is connected with the ceramic inner container (8) in a clamping manner.
5. An electric fireplace heater as defined in claim 1, wherein: the water tank shell (2) is of a closed structure.
6. An electric fireplace heater as defined in claim 1, wherein: the electric heating wire (10) is of a spiral tube structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023007547.4U CN214038605U (en) | 2020-12-15 | 2020-12-15 | Electric heating device of electric fireplace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023007547.4U CN214038605U (en) | 2020-12-15 | 2020-12-15 | Electric heating device of electric fireplace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214038605U true CN214038605U (en) | 2021-08-24 |
Family
ID=77337011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023007547.4U Expired - Fee Related CN214038605U (en) | 2020-12-15 | 2020-12-15 | Electric heating device of electric fireplace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214038605U (en) |
-
2020
- 2020-12-15 CN CN202023007547.4U patent/CN214038605U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215864598U (en) | Heat collection structure for lithium battery material firing roller kiln | |
| CN2893528Y (en) | Electric warm-air machine | |
| CN214038605U (en) | Electric heating device of electric fireplace | |
| CN218672647U (en) | Waste heat recovery mechanism of gas water heater | |
| CN212005895U (en) | Wall-mounted graphene electric heating stove | |
| CN108413797A (en) | Rib-type phase transformation stores heat release integral heat exchanger | |
| CN211823962U (en) | Power plant heat energy recycling device | |
| CN201177321Y (en) | Vacuum superconductor multi-tube vane heat radiator type heating fan | |
| CN211258739U (en) | Computer waste heat utilization device | |
| CN208671695U (en) | A kind of bicirculating box electric kiln of realization internal gas flow | |
| CN208223260U (en) | Rib-type phase transformation stores heat release integral heat exchanger | |
| CN212057744U (en) | Heating furnace | |
| CN206001685U (en) | Small-sized paddy electricity solid heat storage electric furnace | |
| CN217441780U (en) | Energy-saving electric heater | |
| CN110906551A (en) | Electromagnetic heating oil temperature conduction type water heater | |
| CN214370086U (en) | Solar electromagnetic boiler | |
| CN216844873U (en) | Heat supply energy-saving heating and ventilation equipment for whole machine | |
| CN215675803U (en) | Water heater using refrigerator waste heat | |
| CN216114684U (en) | Waste heat recovery type gas hot-blast stove | |
| CN215412528U (en) | Electric heat storage boiler that heat conversion efficiency is high | |
| CN215413110U (en) | High temperature tunnel cave heat recovery utilizes device | |
| CN211476289U (en) | Energy-saving hot air heater | |
| CN219032323U (en) | Thermal insulation box type gas carburizing furnace | |
| CN219160605U (en) | Gas water heater | |
| CN213119283U (en) | PTC electric boiler heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210824 |