CN106714347A - PTC water heater - Google Patents
PTC water heater Download PDFInfo
- Publication number
- CN106714347A CN106714347A CN201710003018.0A CN201710003018A CN106714347A CN 106714347 A CN106714347 A CN 106714347A CN 201710003018 A CN201710003018 A CN 201710003018A CN 106714347 A CN106714347 A CN 106714347A
- Authority
- CN
- China
- Prior art keywords
- ptc
- heating
- water
- fluid passage
- liquid
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims description 60
- 238000010792 warming Methods 0.000 claims description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 239000004411 aluminium Substances 0.000 claims description 11
- 239000012774 insulation material Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 6
- 238000001465 metallisation Methods 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000004512 die casting Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
- B60H1/2221—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters arrangements of electric heaters for heating an intermediate liquid
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
Abstract
The invention discloses a PTC water heater comprising a liquid inlet/outlet pipe, a liquid current collector, and at least two heating assemblies; the heating assembly comprises a PTC heating core and two liquid channels respectively located on two sides of the PTC heating core; the PTC heating core and liquid channels of either heating assembly and other PTC heating cores and liquid channels are arranged on the same plane; two ends of all liquid channels are connected with the liquid inlet/outlet pipe through the liquid current collector. The PTC water heater can improve the PTC heating core heat transfer efficiency, can improve the heating power of the PTC water heater, can reduce water resistance, can save energy, and can reduce cost.
Description
Technical field
The present invention relates to a kind of heater, more particularly to a kind of PTC water-warming heaters.
Background technology
It is the contradiction and the problem of environmental pollution of the fuel oil supply and demand that reply becomes increasingly conspicuous, countries in the world are in propulsion new energy
The development of automobile.Used as heating thermal source, this mode depends on the engine of automobile to the waste heat of the straight grip engine of orthodox car one,
That is the heating of in-car could be implemented in the state of engine work.In addition, the efficiency of this heating system is very
It is low, start in the winter time and need after engine 6-10min and could heat.But electric automobile does not have engine, hybrid vehicle
In-car is also required to heating when to stall.
At present, due to the distinctive positive temperature coefficient resistivity-temperature characteristics of PTC-ceramic, it has temperature automatically controlled, and temperature is with voltage wave
The dynamic influence excellent electrical property such as small and will not burn, the flames of anger, the security feature such as long service life.Made by PTC-ceramic
Ptc heater be a kind of preferable heater, it not only solves and is taken inside electric automobile under cryogenic well
Heat source required for warm wind screen defrosting, moreover it is possible to be applied to the heat management system of electrokinetic cell, environment temperature compared with
Electrokinetic cell is heated when low, and the security performance of electric automobile is ensure that due to its excellent insulating properties.
Electric automobile heating ptc heater has wind to warm up two kinds of hot-water heating, and PTC water-warming heaters are with PTC heating element heaters
Heating core, is fabricated to PTC heating tubes, special aluminium alloy heat carrier is inserted into, by heating and anti-freezing liquid, via evaporator
Warm wind is provided to in-car, warm wind is soft comfortable, and temperature stabilization is moderate, uses safety, efficient energy-saving.In addition, PTC water heaters are also
Can be used for electric automobile power battery heat management system, heated to battery by heating and anti-freezing liquid.
The ptc heater use environment used in electric automobile field has following features：First, operating voltage is high, at least exists
More than 320V, typically in 320VDC-750VDC；2nd, the voltage of electric automobile is not in operation constant, but with fortune
The loss of electricity in row and decline；3rd, because automobile is that, in outdoor application, the change of temperature in four seasons and humidity is big；4th, this heating
Device is arranged in automobile and uses, and needs more preferable anti-shake performance, and requirement to service life is higher, need to reach more than 10 years；
5th, paddling, meeting with rainwater or the partly security performance of the extreme environment such as immersed to ensure electric automobile, it is desirable to PTC
The dust-proof water performance of heater is preferably up to IP67, it is to avoid in-car or car periphery personnel are caused with the unexpected injury of electric shock；6th, mesh
The PTC water-warming heaters of the preceding existing widely used similar German Ai Beihe structures of in the market, have the disadvantage that：(1) structure
Safety defect：Ai Beihe heater structures are as follows, and PTC heating cores insert die casting aluminium groove (as heat conduction tank), and aluminium groove is placed on
In plastic casing, water (anti-icing fluid) flows between plastic casing and aluminium groove, and PTC heating cores conduct heat by heating aluminium groove
To water (in anti-icing fluid).It is the electric-controlled plate for preventing water (anti-icing fluid) from penetrating into above powered PTC heating cores or aluminium groove, it is necessary to
Reliable sealing is carried out between plastic casing and heat conduction aluminum tank, once sealing between the two goes wrong, anti-icing fluid will
PTC heating element heaters, or electric-controlled plate are permeated and touched at faying face, are so easy to the safe thing that electric leakage triggers occur
Therefore.Therefore there is certain potential safety hazard in the PTC water heaters of this structure.(2) cost disadvantage of the structure：Ai Beihe heaters
Structure inserts die casting aluminium slot structure using PTC heating cores, the material cost and cost of manufacture of PTC heating cores and die casting aluminium groove compared with
It is high；(3) the structural thermal effect is poor：PTC heating cores insert heat conduction aluminum groove, do not allow between the two it is easy to attach closely, caused
Relatively large thermal resistance, have impact on the heat conduction of PTC so that the power of PTC is not easy to play.7th, it is existing in the market its
Its PTC water-warming heater, such as east PTC water-warming heaters, have the disadvantage that in its structure：(1) PTC heating cores and water flowing flat tube
(i.e. fluid passage) is spaced, and a water flat tube is shared between two PTC heating cores, and such arrangement is not easy PTC to produce
Raw heat is taken away, it is difficult to give full play to the power of PTC, causes the waste of heat；(2) PTC heating cores and water flowing flat tube be (i.e.
Fluid passage) spaced structure is because water flowing flat tube (i.e. fluid passage) is flat and quantity is few, and water resistance is larger.Although passing through
The adjustment of flat tube size can also reduce water resistance, but influence whether heat-transfer effect.
The content of the invention
Goal of the invention：In order to improve the efficiency of heating surface of PTC water-warming heaters, the utilization rate of PTC heating tubes, the present invention are improved
A kind of PTC water-warming heaters are provided.
Technical scheme：The present invention provides a kind of PTC water-warming heaters, including liquid entrance pipeline, liquid manifold device
And at least two heating components, the heating component includes PTC heating cores and two fluid passages, two fluid passages difference
PTC heating cores and fluid passage and other PTC heating cores and liquid in the both sides of PTC heating cores, any heating component
Passage is arranged in a plane, and the two ends of all liq passage are by liquid manifold device and liquid entrance pipeline communication.
Further, also including support chip, the support chip is inserted between two adjacent heating components.
Further, the support chip is made up of metal or plastics.
Further, the PTC heating cores, between support chip and fluid passage by silica gel it is Nian Jie or by machinery tightly
Match somebody with somebody.
Further, the fluid passage is flat metal tube.
Further, the fluid passage is made of aluminum or copper.
Further, the PTC heating cores include PTC ceramic element, metal electrode film, insulation material layer, the insulation
Material layer wraps PTC ceramic element and metal electrode film, and insulation material layer is Kapton or aluminum oxide substrate or leads
Hot silica gel piece.
Further, also it is enclosed with aluminum pipe outside the PTC heating cores.
Further, the metal electrode film is drawn from PTC heating cores, for connecting external circuit.
Further, also including electrode slice protecting crust, the electrode slice protecting crust wraps external metallization electrode slice.
Operation principle：Water (anti-icing fluid) enters from fluid inlet line, and each heating group is flowed into by liquid manifold device
Fluid passage in part, fluid passage is reached after the PTC heating tubes heating by fluid passage by heat transfer by heat, and water is (anti-
Freeze liquid) be heated after collect from the liquid manifold device of opposite side, then from liquid outlet conduit flow out.
Beneficial effect：The present invention provides a kind of PTC water-warming heaters, by heating the design of component, every PTC heating tube
Two fluid passages of collocation, there is fluid passage every PTC heating tubes both sides, considerably increases between PTC heating tubes and current
Heat exchange area；For PTC heating tubes in the prior art and the spaced structure of fluid passage of comparing, the present invention is being used
In the case of the PTC heating tubes of equal number, more fluid passages can be heated, the heat transfer efficiency of PTC heating tubes
Greatly improve, so as to greatly improve the heating power of PTC water-warming heaters, energy saving reduces use cost；Fluid passage
Increase so that while the amount of liquid for passing through increases, so as to reduce water resistance.Support chip is located between heating component, can be prevented
Fluid passage deforms, and also functions to the effect reinforced.
Brief description of the drawings
Fig. 1 is the structural representation of PTC water-warming heaters；
Fig. 2 is the side view of PTC heating tubes；
Fig. 3 is the sectional view of PTC heating tubes.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, PTC water-warming heaters include liquid entrance pipeline 1, liquid manifold device 2 and at least two
Heating component 3, there is six heating components 3 in the present embodiment, the heating component 3 includes that PTC heating cores 31 and two liquid lead to
Road 32, respectively positioned at the both sides of PTC heating cores 31, the fluid passage 32 in the present embodiment is aluminium flat conduit to two fluid passages 32,
Can also be made of the preferable metal of other thermal conductivity, it is any heating component 3 in PTC heating cores 31 and fluid passage 32 with
Other PTC heating cores 31 and fluid passage 32 are arranged in a plane, the two ends of fluid passage 32 by liquid manifold device 2 with
Liquid entrance pipeline 1 is connected.
Certainly, PTC water-warming heaters can also include other heating cores and fluid passage in addition to heating component 3, with
PTC heating cores and fluid passage in heating component 3 are arranged in approximately the same plane, and arrangement mode is such as：Fluid passage, heating tube,
Fluid passage, fluid passage, heating tube, fluid passage, heating tube, fluid passage ...
Support chip 4 is also inserted between two neighboring heating component 3, support chip 4 is made up of metal or plastics, for supporting
Fluid passage 32, prevents fluid passage 32 from deforming.Aluminium flat conduit internal diameter is narrower, soft material, and support chip 32 can support aluminium flat conduit,
Make it because of deformation liquid communication will not be caused to have some setbacks even to block.When there is other PTC heating cores and fluid passage,
Support chip 4 can also be inserted between fluid passage and other PTC heating cores or fluid passage in heating component 3, is acted on and this
The effect of support chip 4 is identical in embodiment.
Firmly it is heating and curing by the way that silica gel is Nian Jie between the PTC heating cores 31, support chip 4 and fluid passage 32, or
Directly by mechanical close-fitting.As shown in figure 1, three put in order for：Fluid passage 32, PTC heating cores 31, fluid passage
32nd, support chip 4, fluid passage 32, PTC heating cores 31, fluid passage 32, support chip 4 ... fluid passage 32, PTC heating cores
31st, fluid passage 32.
As shown in figure 3, in the present embodiment, in order to reinforce PTC heating cores 31, aluminum pipe is wrapped with PTC heating cores 31
314, as PTC heating tubes, PTC heating cores 31 include PTC ceramic element 311, metal electrode film 312, insulation material layer 313,
The insulation material layer 313 wraps PTC ceramic element 311 and metal electrode film 312, fill in aluminum pipe 314 by rolling or
Concora crush forms PTC heating tubes.In actually used, it is also possible to do not use aluminum pipe 314, PTC is wrapped with the sealed bundle of insulation material layer 313
Ceramic component 311 and metal electrode film 312.Insulation material layer 313 is Kapton or aluminum oxide substrate or heat conduction
Silica gel piece.Metal electrode film 312 is drawn from PTC heating cores 31, for connecting external circuit, as shown in Fig. 2 external metallization is electric
Electrode slice protecting crust 315 is also enclosed with pole piece 312, safety protection function is played, short circuit between electrode is also prevented from.
As preferred, every PTC heating core two fluid passages of collocation in the present embodiment, every PTC heating core two
There is a fluid passage side, considerably increases the heat exchange area between PTC heating tubes and current；And PTC adds in the prior art
Heat pipe is spaced with fluid passage, is heated by two PTC heating tubes positioned at middle fluid passage, due to heat exchange area
Small, the heat that PTC is produced is not easy to be pulled away, and power is difficult to give full play to..The present invention can be heated in the PTC of equal number
In the case of pipe, more fluid passages can be heated, the heat transfer efficiency of PTC heating tubes is greatly improved, so that significantly
Improve the heating power of PTC water-warming heaters；The increase of fluid passage so that while the amount of liquid for passing through increases, so as to reduce
Water resistance, and heat-transfer effect will not be influenceed as increasing the width of fluid passage.
It should be noted that unaccounted part of the invention is prior art.Above example is only to illustrate the invention
Technological thought, it is impossible to protection scope of the present invention is limited with this, it is every according to technological thought proposed by the present invention, in technical side
Any change done on the basis of case, each falls within the scope of the present invention.
Claims (10)
1. a kind of PTC water-warming heaters, it is characterised in that including liquid entrance pipeline (1), liquid manifold device (2) and
At least two heating component (3), heating component (3) includes PTC heating cores (31) and two fluid passages (32), two liquid
Body passage (32) is respectively positioned at the both sides of PTC heating cores (31), PTC heating cores (31) and liquid in any heating component (3)
Passage (32) is arranged in a plane, the two of all liq passage (32) with other PTC heating cores (31) and fluid passage (32)
End is connected by liquid manifold device (2) with liquid entrance pipeline (1).
2. PTC water-warming heaters according to claim 1, it is characterised in that also including support chip (4), the support chip
(4) it is inserted between two adjacent heating components (3).
3. PTC water-warming heaters according to claim 2, it is characterised in that the support chip (4) is by metal or plastics
It is made.
4. PTC water-warming heaters according to Claims 2 or 3, it is characterised in that the PTC heating cores (31), support chip
(4) it is Nian Jie or by mechanical close-fitting by silica gel between fluid passage (32).
5. PTC water-warming heaters according to claim 1 or 2 or 3, it is characterised in that the fluid passage (32) is gold
Category flat tube.
6. PTC water-warming heaters according to claim 5, it is characterised in that the fluid passage (32) is by aluminium or copper
Into.
7. PTC water-warming heaters according to claim 1 or 2 or 3, it is characterised in that the PTC heating cores (31) include
PTC ceramic element (311), metal electrode film (312), insulation material layer (313), the insulation material layer (313) wrap PTC
Ceramic component (311) and metal electrode film (312), insulation material layer (313) is for Kapton or aluminum oxide substrate or leads
Hot silica gel piece.
8. PTC water-warming heaters according to claim 7, it is characterised in that the PTC heating cores (31) are also enclosed with outward
Aluminum pipe (314).
9. PTC water-warming heaters according to claim 7, it is characterised in that the metal electrode film (312) adds from PTC
Drawn in hot core (31), for connecting external circuit.
10. PTC water-warming heaters according to claim 9, it is characterised in that also including electrode slice protecting crust (315), institute
State electrode slice protecting crust (315) and wrap external metallization electrode slice (312).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003018.0A CN106714347A (en) | 2017-01-04 | 2017-01-04 | PTC water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003018.0A CN106714347A (en) | 2017-01-04 | 2017-01-04 | PTC water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106714347A true CN106714347A (en) | 2017-05-24 |
Family
ID=58905840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710003018.0A Pending CN106714347A (en) | 2017-01-04 | 2017-01-04 | PTC water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106714347A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830633A (en) * | 2017-12-08 | 2018-03-23 | 深圳市赛尔盈电子有限公司 | The integrated control PTC warm air heaters of one kind |
| CN107933246A (en) * | 2017-12-30 | 2018-04-20 | 江苏超力电器有限公司 | A kind of integral in-vehicle hot-water heating PTC calandria sink assemblies |
| CN109383233A (en) * | 2018-10-15 | 2019-02-26 | 江苏东方电热器制造有限公司 | A kind of new-energy automobile PTC electric heater adjustment type locating piece |
| CN109556280A (en) * | 2018-12-22 | 2019-04-02 | 深圳市天翔宇科技有限公司 | A kind of PTC liquid heater |
| CN110254177A (en) * | 2018-03-12 | 2019-09-20 | 埃贝斯佩歇气候控制系统有限责任两合公司 | Vehicular heating system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205606882U (en) * | 2016-05-05 | 2016-09-28 | 上海帕克热敏陶瓷有限公司 | New energy automobile PTC coolant liquid heating device |
| CN106058382A (en) * | 2016-07-15 | 2016-10-26 | 田峰业 | Heating system for battery module and battery module |
-
2017
- 2017-01-04 CN CN201710003018.0A patent/CN106714347A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205606882U (en) * | 2016-05-05 | 2016-09-28 | 上海帕克热敏陶瓷有限公司 | New energy automobile PTC coolant liquid heating device |
| CN106058382A (en) * | 2016-07-15 | 2016-10-26 | 田峰业 | Heating system for battery module and battery module |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830633A (en) * | 2017-12-08 | 2018-03-23 | 深圳市赛尔盈电子有限公司 | The integrated control PTC warm air heaters of one kind |
| CN107933246A (en) * | 2017-12-30 | 2018-04-20 | 江苏超力电器有限公司 | A kind of integral in-vehicle hot-water heating PTC calandria sink assemblies |
| CN110254177A (en) * | 2018-03-12 | 2019-09-20 | 埃贝斯佩歇气候控制系统有限责任两合公司 | Vehicular heating system |
| CN110254177B (en) * | 2018-03-12 | 2023-03-14 | 埃贝斯佩歇气候控制系统有限公司 | Vehicle heating system |
| CN109383233A (en) * | 2018-10-15 | 2019-02-26 | 江苏东方电热器制造有限公司 | A kind of new-energy automobile PTC electric heater adjustment type locating piece |
| CN109556280A (en) * | 2018-12-22 | 2019-04-02 | 深圳市天翔宇科技有限公司 | A kind of PTC liquid heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170524 |