CN2606862Y - Liquid filled electric heater - Google Patents
Liquid filled electric heater Download PDFInfo
- Publication number
- CN2606862Y CN2606862Y CN 03237140 CN03237140U CN2606862Y CN 2606862 Y CN2606862 Y CN 2606862Y CN 03237140 CN03237140 CN 03237140 CN 03237140 U CN03237140 U CN 03237140U CN 2606862 Y CN2606862 Y CN 2606862Y
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- China
- Prior art keywords
- central tube
- tube
- overcoat
- wiring storehouse
- storehouse
- Prior art date
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Abstract
The utility model discloses a liquid filled electric heater, comprising a central tube, an electric heating film ceramic tube, an insulation connection bin with a wiring terminal inside and a sleeve, wherein the central tube and the electric heating film ceramic tube are nested and sealed, an annular heating cavity is formed between the central tube and the electric heating film ceramic tube, a cavity of the central tube corresponding to the annular heating cavity is fixed with a water-blocking plug of central tube to divide the central tube into two isolated cavities, the walls of the central tube of the two cavities of the central tube are respectively provided with an inlet and an outlet to communicated with the annular heating cavity; the electric heating film ceramic tube and the electric heating film layer are fixed with two electrode extraction terminals by electric connection and respectively connected with two wires, which are connected with a film temperature fuse on the outer wall of the ceramic tube and a temperature control regulator on the outer wall of the central tube, the outside of the ceramic tube are nested with a sleeve as insulation. The utility model has the advantages of compartment use, compartment control, high electric heating efficiency, long service life, security and reliability, provides better conditions for energy conservation and more efficient heating.
Description
Technical field
The utility model provides the heater in a kind of heating equipment, especially a kind of liquid-filled electric heater.
Background technology
For a long time, winter heating uses coal or fuel oil to act as a fuel more, and this heating system is bigger to the damage ratio of environment, and now, many places have banned use of coal to make heating fuel.Electricity is a kind of energy of cleaning, and using it is more satisfactory as the fuel of heating.It is a lot of to use electric energy to make the heater of heating fuel in the prior art, and stack up has the indirect heating apparatus of the heater of resistance-type and medium in the electricity consumption heating, vacuum pipe such as wet goods several.The thermal efficiency of these electric heaters is not very high.Also has a kind of Electric heating in the prior art, it is the Electric radiant Heating Film heating, this heater thermal efficiency is very high, but existing device for heating electric heating membrane can't be applicable to the heater as warming, particularly do not have a kind of can be in dwelling house big, long service life in branch family, locellus ground regulation and control indoor temperature, electric heating transformation ratio and safe and reliable electric heater.
Summary of the invention
The purpose of this utility model is to improve deficiency of the prior art, and a kind of electric heating transformation ratio is big, the control of long service life locellus is used and safe and reliable liquid-filled electric heater but provide.
The purpose of this utility model is achieved in that
The liquid-filled electric heater that the utility model provides comprises a central tube, establishes insulation joint storehouse and overcoat of binding post in the electro-thermal film ceramic pipe, one,
Pipeline section between the port of described central tube two ends partly is located in the described electro-thermal film ceramic pipe, between this central tube and electro-thermal film ceramic pipe, form a ring-shaped heating cavity chamber, between this central tube and electro-thermal film ceramic pipe, be provided with sealing device, make the sealing of formed ring-shaped heating cavity chamber; In tube chamber, set firmly the central tube plug that blocks water to described central tube that should the ring-shaped heating cavity chamber, it is divided into two chambers of mutually isolating with this central tube tube chamber, offers delivery port and water inlet and the communication of described ring-shaped heating cavity chamber respectively on the tube wall of this two chambers of described central tube;
Described electro-thermal film ceramic pipe comprises an earthenware, sintering sets firmly one deck electric membranous layer on the outer wall of this earthenware, on this earthenware, set firmly two electrode leads to client with this electric membranous layer ground connection that is electrically connected, this leading-out terminal connects two leads respectively, this lead mutually insulated ground is introduced described wiring storehouse and is fixedlyed connected with the binding post that is fixedly arranged on wherein, also be electrically connected a film temperature fuse of being located on the described earthenware outer wall on this lead, in addition, also be electrically connected a water temperature temperature controller of being located on the described central tube outer wall on this lead;
At the sheathed described overcoat in the outer insulation ground of described earthenware, two ports of described central tube expose the outside at described overcoat.
The liquid-filled electric heater that the utility model provides is work like this: two ports of described central tube are connected in the pipeline import and export of a water circulation system, recirculated water is flowed into by the arrival end of central tube, owing to be provided with this plug that blocks water in the central tube, the delivery port that the water that flows into is promptly offered from the central tube tube wall of this side cavity flow into the described ring-shaped heating cavity chamber, at this, the Electric radiant Heating Film of energising heats earthenware, water then is heated at this, water continues to flow, enter into another chamber of central tube by the described water inlet on another chamber in the central tube, the port of export by central tube flows out then, enter in the water circulation pipe, the desuperheated water of heat exchange comes back to the arrival end of this heater in water circulation pipe.If the pipeline of this water circulation system is a gilled radiator, then heated water is dispersed into heat in the air at this, can heat its ambient air, thereby makes indoor warming.
Described sealing device between described central tube and the electro-thermal film ceramic pipe can be a flange sealer: the hole is established at the center of the seat chamber base plate of flange seat, by this hole flange seat is set on this earthenware outer wall, the hole is also established at the blind flange center, it is set on this central tube, porcelain tube port sealing cushion rubber is set between the port of this blind flange cover plate and earthenware, on the central tube on the lateral surface of this blind flange, also is arranged with central tube sealing O shape cushion rubber.Thus, just can stop the water of described ring-shaped heating cavity chamber by leaking between earthenware and the blind flange and between the centre bore of blind flange and the central tube effectively.Further, can on the periphery in the seat chamber bottom centre hole of this flange seat, also be provided with a porcelain tube waterproof sealing O shape cushion rubber, with further the prevention poorly sealed and leakage that occurs of the O-ring seal on the earthenware port as described above.The porcelain tube sealing gland holding screw that is spirally connected in the screw of this flange seat and the ring flange correspondence coupling by being convexly equipped with on its excircle is spirally connected and tightens up.
Described insulation joint storehouse comprises wiring storehouse base plate, wiring storehouse loam cake and wiring storehouse insulation sleeve, this wiring storehouse base plate and wiring storehouse loam cake connect and compose a wiring bin with the two ends of wiring storehouse insulation sleeve respectively, the hole is established at the center of this wiring storehouse base plate and wiring storehouse loam cake so that this wiring storehouse is set on this central tube the outside of set sealing device between described central tube and electro-thermal film ceramic pipe, on this wiring storehouse base plate, be provided with two lead perforation, penetrate in this wiring storehouse for two leads that connect on two electrode leads to client that are connected on the described earthenware with being spaced from each other, and with wiring storehouse base plate on the binding post that sets firmly connect firmly, on the base plate of wiring storehouse, establish a screw in addition, be arranged with one and described central tube and the contacted ground connection locknut of electro-thermal film ceramic pipe on the central tube outside the wiring storehouse, in that to establish a screw on this locknut corresponding with the screw on the base plate of wiring storehouse, spiral shell is established a ground connection screw in this two screw, on this screw, draw earth lead, on the sidewall of this wiring storehouse insulation sleeve, establish hole or groove, set firmly power line therein and protect mouth, make described two leads and an earth lead protect mouth and draw with power supply and be connected by this.
The two ends of described central tube are provided with spiro union portion, the outer wall of the central tube of this spiro union portion is provided with screw thread, described overcoat is located in the outside in earthenware and wiring storehouse, wear two overcoat end caps at the two ends of the above overcoat of central tube, can be provided with flange on the inwall of one side ports of this end cap, to support the port that ends this overcoat, overcoat end cap locknut is spirally connected on the central tube in the outside of this overcoat end cap, this overcoat is fixed on this central tube, protects Kou Chu at the power line to should the wiring storehouse of this overcoat and be provided with perforation and stretch out protect mouthful by overcoat for this power line in.
The perforated area of set delivery port and water inlet is preferably different on the described central tube, the delivery port area is big, and the water inlet area is smaller, the central tube of general this electric heater is when being connected with radiator, it is vertical setting, at this moment, water enters from the central tube port of below, thus, flow out by central tube the delivery port enter described ring-shaped heating cavity body at the water inlet of another cavity that enters central tube down and more then last, aforesaid, under the delivery port area big, can prevent effectively that the contamination precipitation in the sealing stops up described delivery port.
The liquid-filled electric heater that the utility model provides, by the central tube of mutual fit and the ring-shaped heating cavity chamber of electro-thermal film ceramic pipe formation the aqueous medium of flowing through is heated, because the ring section shape of heated chamber, make between water and the thermal Ceramics pipe contact close, the thermal efficiency is higher, and in addition, the sealing device on this ring-shaped heating cavity chamber can be guaranteed its reliable sealing, and the insulation joint storehouse that is provided with makes the insulation safety of this electric heater very high, can guarantee safe in utilization.The described water temperature temperature controller that is electrically connected on this electric heater makes this heater can control the heating-up temperature of water, promptly set and add hot water temperature's value, when the temperature of the water that passes through equals the temperature value of this setting, can cut off the electricity supply automatically, and when being lower than the temperature value of this setting, water temperature can connect power supply automatically, thus, can prevent the temperature overload, and the film temperature fuse that is arranged on the earthenware outer wall can be implemented monitoring to the temperature of earthenware, if this heater lack of water, the improper rising of temperature meeting of earthenware, even meeting breaking out of fire, and film temperature fuse can be worked as the temperature of earthenware and reached fusing immediately after the setting value, and can not recover again, so just can avoid the danger of heater dry combustion method.Two ports of the central tube of this liquid-filled electric heater can be imported and exported respectively by pipe collar, constitute a heater to silk or by appointing to couple together with the water pipe of a gilled radiator, establish recirculated water therein, heating by this electric heater makes water circulation automatically between the pipeline of this heater and radiator, does not need to establish in addition cycle power device.Described the drawing on the lead of this heater can also connect an indoor temperature controller in use, it sets certain room temperature, when room temperature is lower than design temperature, power connection, the work of this heater adds the recirculated water in the heat radiator, when room temperature is higher than this design temperature, cut off the electricity supply, can reach the purpose of saves energy like this.Can be seated in the room with this heater of this electric heater combination, this room is heated, each unit of a residential building, each room in unit all can be put into this heater respectively, respectively the heating-up temperature of this electric heater in each room is set according to the needs that use, locellus is controlled very easy respectively, employed in this electric heater is water, preferably use pure water in the use, like this, even long-time the use, the problem that heating efficiency reduces can not appear yet, long service life, therefore, but the liquid-filled electric heater that the utility model provides has locellus to be used, locellus control, the electrothermal efficiency height, long service life and safe and reliable advantage are for energy-conservation and more efficient heating provides good condition.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
The main sectional structure schematic diagram of the liquid-filled electric heater that Fig. 1 provides for the utility model;
Fig. 2 is the structural representation of the central tube in the electric heater shown in Figure 1;
Fig. 3 is the structural representation of the electro-thermal film ceramic pipe in the electric heater shown in Figure 1;
Fig. 4 is the structural representation in the insulation joint storehouse in the electric heater shown in Figure 1;
Fig. 5 is the structural representation that electric heater shown in Figure 1 is connected with radiator.
The specific embodiment
As shown in Figure 1, the liquid-filled electric heater that provides of the utility model comprises insulation joint storehouse A and overcoat B who establishes binding post in 1, electro-thermal film ceramic pipe of a central tube 13.
As illustrated in fig. 1 and 2, pipeline section between central tube 1 two ends port one a and the 1b partly is located in the electro-thermal film ceramic pipe 13, between central tube 1 and electro-thermal film ceramic pipe 13, form a ring-shaped heating cavity chamber C, in tube chamber, set firmly the central tube plug 21 that blocks water to central tube 1 that should ring-shaped heating cavity chamber C, it is divided into two mutually isolated chamber D and chamber E with this central tube tube chamber, offers delivery port 11 respectively and water inlet 12 is linked up with ring-shaped heating cavity chamber C on the central tube tube wall of these two the chamber D of central tube 1 and E.Delivery port 11 set on the central tube 1 is different with the perforated area of water inlet 12, delivery port 11 areas are big, it is for being provided with two slotted holes on relative tube wall, with vertical two other the relative tube wall in these two slotted hole positions on the equal diameter circular hole of two upper and lower settings is set, and water inlet 12 areas are smaller, and it establishes two equal diameter one circular holes of arranging in the axial direction for 90 degree of being separated by on 360 degree circumference of tube wall.
As shown in figs. 1 and 3; electro-thermal film ceramic pipe 13 comprises an earthenware 131; sintering sets firmly one deck electric membranous layer 132 on the outer wall of earthenware 131; on this earthenware 131, set firmly two electrode leads to client 10 with this electric membranous layer 132 ground connection that is electrically connected; this leading-out terminal 10 connects two lead (not shown)s respectively; this lead mutually insulated ground is introduced wiring storehouse A and is fixedlyed connected with the binding post that is fixedly arranged on wherein; also be electrically connected with a film temperature fuse 24 of being located on described earthenware 131 outer walls on this lead; if the temperature of Electric radiant Heating Film and earthenware reaches certain high numerical value; this fuse 24 will fuse; make the outage of this heater; play the effect of safeguard protection; when this heater connects electricity in lack of water the time, prevent to burn out the generation of this heater and fire, this fuse is implemented power-off protection.In addition; also be electrically connected a temperature control adjuster 7 on this lead; this temperature control adjuster 7 is fixedly arranged on the central tube outer wall by fixation clamp 4; it is arranged in insulation joint bin A1, the temperature of the water that wherein flows through is monitored, after water temperature reaches certain high numerical value; this temperature control adjuster is cut off the electricity supply automatically; implement overload protection, and when water temperature is lower than certain numerical value, its auto-closing.Above film temperature fuse 24 and thermostat 7 improve the security of this heater greatly.
The sheathed overcoat B on the outer insulation ground of electro-thermal film ceramic pipe 13.
The sealing device that makes formed ring-shaped heating cavity chamber C sealing that is provided with in the middle of central tube 1 and electro-thermal film ceramic pipe 13 is a flange sealer, flange seat 9 centers are established borehole jack and are located on this earthenware outer wall, blind flange 8 centers are also established borehole jack and are located on the central tube 1, between the port of these blind flange 8 cover plates and earthenware, porcelain tube port sealing cushion rubber 19 is set, on the central tube on the lateral surface of blind flange 81, also be arranged with central tube sealing O shape cushion rubber 14, be provided with a packing washer in the outside of this cushion rubber 14, leak outside along the central tube tube wall with this anti-sealing.Further, also be provided with a porcelain tube waterproof sealing O shape cushion rubber 18 in the seat chamber bottom of flange seat 9, the porcelain tube sealing gland holding screw 25 that is spirally connected in this flange seat 9 and ring flange 8 screw by the correspondence coupling that is convexly equipped with on its excircle is spirally connected and tightens up.
Insulation joint storehouse A comprises wiring storehouse base plate 22, wiring storehouse loam cake 5 and wiring storehouse insulation sleeve 6, wiring storehouse base plate 22 and wiring storehouse loam cake 5 connect and compose a wiring bin A1 with the two ends of wiring storehouse insulation sleeve 6 respectively, the centre of wiring storehouse base plate 22 and wiring storehouse loam cake 5 establishes the hole so that this wiring storehouse A is set on the central tube 1 outside of a set sealing device between central tube 1 and electro-thermal film ceramic pipe 13, on wiring storehouse base plate 22, be provided with two lead perforation 221 and 222, penetrate in this wiring storehouse for two leads that connect on two electrode leads to client 10 that are connected on the earthenware 131 with being spaced from each other, and with wiring storehouse base plate 22 on the binding post 223 that sets firmly connect firmly, on wiring storehouse base plate 22, establish in addition with screw 224, be provided with on the central tube 1 outside the A of wiring storehouse one and central tube 1 and electro-thermal film ceramic pipe 13 between the contacted ground connection locknut 15 of described sealing device, in that to establish a screw on the ground connection locknut 15 corresponding with the screw on the base plate of wiring storehouse, spiral shell is established a ground connection screw 16 in this two screw, on this screw 16, draw the earth lead (not shown), on the sidewall of this wiring storehouse insulation sleeve 6, establish groove 61, set firmly power line therein and protect mouthfuls 17, make described two leads and an earth lead protect mouthfuls 17 and draw with the power supply (not shown) and be connected by this.
The two ends of central tube 1 are provided with spiro union portion 1c and 1d, the outer wall of the central tube of this spiro union portion 1c and 1d is provided with screw thread, stainless steel outer sleeve tube 23 is located in the outside of earthenware 131 and wiring storehouse A, the two ends of outer sleeve 23 wear two overcoat end caps 3 on central tube 1, can be provided with flange on the inwall of one side ports of this end cap 3, to support the port that ends this outer sleeve 23, overcoat end cap locknut 2 is spirally connected on spiro union portion 1c on the central tube 1 in the outside of this overcoat end cap 3 and 1d, the lateral wall of this overcoat end cap locknut 2 is provided with fin, use is colluded spanner and can be screwed or outward winding, and this overcoat B is fixed on this central tube 1, protect Kou Chu at the power line to should the wiring storehouse of this outer sleeve and be provided with perforation and protect mouthfuls 17 for this power line and stretch out in by overcoat.
In use, with the water inlet of two ports of the central tube of this liquid-filled electric heater and gilled radiator F pipeline and delivery port by getting final product by times linking together.
Claims (8)
1, a kind of liquid-filled electric heater is characterized in that: comprises a central tube, establishes insulation joint storehouse and overcoat of binding post in the electro-thermal film ceramic pipe, one,
Pipeline section between the port of described central tube two ends partly is located in the described electro-thermal film ceramic pipe, between this central tube and electro-thermal film ceramic pipe, form a ring-shaped heating cavity chamber, in the middle of this central tube and electro-thermal film ceramic pipe, be provided with sealing device and make the sealing of formed ring-shaped heating cavity chamber; In tube chamber, set firmly with the central tube plug that blocks water described central tube that should the ring-shaped heating cavity chamber, it is divided into two with this central tube tube chamber, and mutually each must chamber, offers delivery port and water inlet and the communication of described ring-shaped heating cavity chamber respectively on the central tube tube wall of this two chambers of this central tube;
Described electro-thermal film ceramic pipe comprises an earthenware, sintering sets firmly one deck electric membranous layer on the outer wall of this earthenware, on this earthenware, set firmly two electrode leads to client with this electric membranous layer ground connection that is electrically connected, this leading-out terminal connects two leads respectively, this lead mutually insulated ground is introduced described wiring storehouse and is fixedlyed connected with the binding post that is fixedly arranged on wherein, also be electrically connected a film temperature fuse of being located on the described earthenware outer wall on this lead, in addition, also be electrically connected a water temperature temperature controller of being located on the described central tube outer wall on this lead;
At the sheathed described overcoat in the outer insulation ground of described earthenware, two ports of described central tube expose the outside at described overcoat.
2, liquid-filled electric heater according to claim 1, it is characterized in that: described insulation joint storehouse comprises wiring storehouse base plate, wiring storehouse loam cake and wiring storehouse insulation sleeve, this wiring storehouse base plate and wiring storehouse loam cake connect and compose a wiring bin with the two ends of wiring storehouse insulation sleeve respectively, the hole is established at the center of this wiring storehouse base plate and wiring storehouse loam cake so that this wiring storehouse is set on this central tube the outside of a set sealing device between described central tube and electro-thermal film ceramic pipe, on this wiring storehouse base plate, be provided with two lead perforation, penetrate in this wiring storehouse for being connected two leads that connect on two electrode leads to client on the described earthenware with being spaced from each other, and with wiring storehouse base plate on the binding post that sets firmly connect firmly; On the base plate of wiring storehouse, establish in addition with screw, be provided with on the central tube outside the wiring storehouse one with described central tube and the contacted ground connection locknut of electro-thermal film ceramic pipe, in that to establish a screw on this locknut corresponding with the screw on the base plate of wiring storehouse, spiral shell is established a ground connection screw in this two screw, on this screw, draw earth lead, on the sidewall of this wiring storehouse insulation sleeve, establish hole or groove, set firmly power line therein and protect mouth, make described two leads and an earth lead protect mouth and draw by this.
3, liquid-filled electric heater according to claim 1, it is characterized in that: the two ends of described central tube are provided with spiro union portion, the outer wall of the central tube of this spiro union portion is provided with screw thread, described overcoat is located in the outside in earthenware and wiring storehouse, wear two overcoat end caps at the two ends of the above overcoat of central tube, can be provided with flange on the inwall of one side ports of this end cap, to support the port that ends this overcoat, overcoat end cap locknut is spirally connected on the central tube in the outside of this overcoat end cap, this overcoat is fixed on this central tube, protects Kou Chu at the power line to should the wiring storehouse of this overcoat and be provided with perforation and stretch out protect mouthful by overcoat for this power line in.
4, liquid-filled electric heater according to claim 1 is characterized in that: the set delivery port and the perforated area of water inlet are different on the described central tube, and the delivery port area is big, and the water inlet area is smaller.
5, liquid-filled electric heater according to claim 1, it is characterized in that: the described sealing device between described central tube and the electro-thermal film ceramic pipe is a flange sealer, the flange seat center is established borehole jack and is located on this earthenware outer wall, the blind flange center is also established borehole jack and is located on this central tube, porcelain tube port sealing cushion rubber is set between the port of this blind flange cover plate and earthenware, on the central tube on the lateral surface of this blind flange, also is arranged with central tube sealing O shape cushion rubber; The porcelain tube sealing gland holding screw that is spirally connected in the screw of this flange seat and the ring flange correspondence coupling by being convexly equipped with on its excircle is spirally connected and tightens up.
6, liquid-filled electric heater according to claim 5 is characterized in that: the bottom, seat chamber at this flange seat is provided with a waterproof sealing O shape cushion rubber again.
7, liquid-filled electric heater according to claim 4, it is characterized in that: set delivery port on the described central tube, it is for being provided with two slotted holes on relative tube wall, with vertical two other the relative tube wall in these two slotted hole positions on the equal diameter circular hole of two upper and lower settings is set, and water inlet, it establishes two equal diameter circular holes of arranging in the axial direction for 90 degree of being separated by on 360 degree circumference of tube wall.
8, liquid-filled electric heater according to claim 1 is characterized in that: described water temperature temperature controller is fixedly arranged on the central tube outer wall by fixation clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03237140 CN2606862Y (en) | 2003-01-30 | 2003-01-30 | Liquid filled electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03237140 CN2606862Y (en) | 2003-01-30 | 2003-01-30 | Liquid filled electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2606862Y true CN2606862Y (en) | 2004-03-17 |
Family
ID=34167207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03237140 Expired - Fee Related CN2606862Y (en) | 2003-01-30 | 2003-01-30 | Liquid filled electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2606862Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538172A (en) * | 2012-01-21 | 2012-07-04 | 冯海涛 | Water boiling device with electrothermal board water boiling cavity |
| CN102679559A (en) * | 2012-05-30 | 2012-09-19 | 冯海涛 | Glass pipe heater with accurate temperature sensing function |
| CN106274941A (en) * | 2016-08-01 | 2017-01-04 | 中车唐山机车车辆有限公司 | Heater and rail vehicle |
| CN107770886A (en) * | 2016-08-22 | 2018-03-06 | 上海福沃机械有限公司 | Electrically heated rod |
-
2003
- 2003-01-30 CN CN 03237140 patent/CN2606862Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538172A (en) * | 2012-01-21 | 2012-07-04 | 冯海涛 | Water boiling device with electrothermal board water boiling cavity |
| CN102679559A (en) * | 2012-05-30 | 2012-09-19 | 冯海涛 | Glass pipe heater with accurate temperature sensing function |
| CN102679559B (en) * | 2012-05-30 | 2015-03-11 | 冯海涛 | Glass pipe heater with accurate temperature sensing function |
| CN106274941A (en) * | 2016-08-01 | 2017-01-04 | 中车唐山机车车辆有限公司 | Heater and rail vehicle |
| CN107770886A (en) * | 2016-08-22 | 2018-03-06 | 上海福沃机械有限公司 | Electrically heated rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |