CN216650013U - PTC heater for SPA and heater for SPA pool - Google Patents
PTC heater for SPA and heater for SPA pool Download PDFInfo
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- CN216650013U CN216650013U CN202122427465.3U CN202122427465U CN216650013U CN 216650013 U CN216650013 U CN 216650013U CN 202122427465 U CN202122427465 U CN 202122427465U CN 216650013 U CN216650013 U CN 216650013U
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Abstract
The utility model discloses a PTC heater for SPA and a heater for a SPA pool, wherein the PTC heater for the SPA comprises a heating core body, a heat conduction assembly and an anticorrosive layer, wherein the heating core body is a heating unit for converting electric energy into heat energy; the heat conduction assembly is arranged outside the heating core body and comprises heat conduction pipes and a sealing plug, wherein the inner diameters of the more than two heat conduction pipes are different, and the heat conduction pipes are sleeved outside the heating core body layer by layer from small to large; the sealing plugs are arranged at two ends of the heating core body; the anticorrosive coating is sprayed on the surface of the outermost heat conduction pipe, which is in contact with the outside. The utility model arranges more than two heat conduction pipes with different inner diameters in the heat conduction assembly, and multilayer protection is formed on the heating core body by sleeving layer by layer, so that the thermal resistance caused by gaps is reduced as much as possible; the arrangement of the sealing plug powerfully improves the insulating property of the PTC heater, and in addition, the corrosion resistance of the PTC heating pipe is obviously enhanced by the anticorrosive coating; the outermost layer of the heat pipe is not subjected to pipe shrinkage or pressing, microcracks do not exist on the surface, and water immersion and corrosion are effectively prevented.
Description
Technical Field
The utility model relates to the technical field of heaters, in particular to a PTC heater for an SPA and a heater for an SPA pool.
Background
Because the PTC ceramic element has the characteristic of special positive temperature coefficient resistance temperature, PTC heater products are widely favored in the technical field of heating, and are widely applied to the field of household appliances for heating by air heating, such as air conditioner auxiliary heating, fan heaters, bath heaters and the like; defrosting, warming and the like of the traditional fuel oil automobile; heating in the new energy automobile, battery thermal management and the like.
The PTC heater adopts PTC ceramic as a core heating element, and has the advantages of automatic temperature control, wide application voltage range, no open fire, safety, reliability, long service life and the like compared with the traditional heating wire, electric heating tube and far infrared quartz heater. In the field of high-power heating, the application range of the PTC heater is continuously expanded, and in addition to the field of air heating, the PTC heater is also widely applied to water heating occasions such as a pool (SPA) for family leisure and entertainment, a floor heating device, an electric water heater, a new energy automobile battery thermal management and the like, and is used for rapidly heating water or automobile antifreeze.
The PTC heater used in water has higher insulating property requirement compared with a wind heating heater, especially the PTC heater used for SPA water, people can stay in water for a long time, the safety requirement is extremely high, a small amount of chlorine pieces can be added into the SPA water for disinfection, and sometimes seawater can be used, so that the PTC heater contacted with water also needs certain corrosion resistance, otherwise, the potential safety hazard (the water corrodes the heater shell and permeates into the heating core body to cause poor insulation, so that the water is electrified) can be generated.
In the prior art, PTC heaters for SPA have generally two configurations: a rectangular PTC heating aluminum pipe is manufactured and placed in a water-passing shell to emit heat, and the aluminum pipe is conveyed to a water channel of the water-passing aluminum shell through an electrode plate, an insulating film and an aluminum pipe, so that water in the water channel is heated; the other method is to plug the round PTC heating core body into the round metal pipe for pipe shrinking to form a heating metal pipe, finally plug the heating metal pipe into a stainless steel round pipe with a slightly larger inner diameter, and then shrink the pipe again to form the PTC heater for directly heating water.
In the long-time use process, especially in a household leisure and entertainment pool (SPA), water needs to be disinfected, the water has chloride ions with certain concentration, and sometimes seawater is used, so that the corrosivity is higher. The water course and the sealed face in both ends of leading to water aluminium casing of former structure can appear certain corruption, lead to sealed inefficacy, and serious messenger's casing is perforated, and water will permeate to PTC heating tube is inside to cause the safety problem of electric leakage. The outer stainless steel heating pipe of the latter structure has better corrosion resistance, and the inner metal pipe and the outer stainless steel pipe both adopt a pipe-contracting structure, so that the thermal resistance is small. However, this structure has the following fatal drawbacks:
1) although stainless steel has better corrosion resistance than aluminum, the corrosion resistance to chloride ions is poor, and the stainless steel is not suitable for heating an SPA water tank;
2) when the outer layer of stainless steel passes through the pipe shrinkage, microcracks and defects exist on the surface of the outer layer of stainless steel, and in the long-term use process in water, the microcracks and the defects are weak points and are corroded firstly, so that the cracks are enlarged, water permeates into the stainless steel and further permeates into a heating core body inside the metal pipe (the metal pipe is subjected to heat shrinkage, and the microcracks also exist on the surface of the metal pipe), so that poor insulation is caused, and great potential safety hazards are caused;
3) the heat conductivity of the outer stainless steel pipe is greatly lower than that of the inner aluminum metal pipe, the heat resistance is high, and the heating efficiency is low.
Therefore, a PTC heater suitable for SPA with simple structure, strong corrosion resistance and high heat conduction efficiency is needed in the art.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides the PTC heater which is simple in structure, strong in corrosion resistance, good in insulation property and high in heat conduction efficiency and is suitable for the SPA.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
on one hand, the utility model discloses a PTC heater for SPA, which comprises a heating core body, a heat conduction assembly and an anticorrosive layer, wherein the heating core body is a heating unit for converting electric energy into heat energy, and comprises a PTC ceramic element, a metal electrode and insulating paper; the PTC ceramic element is arranged in the middle, the number of the metal electrodes is two, the two metal electrodes are respectively attached to two sides of the PTC ceramic element to form a heating assembly with a circular cross section, and the periphery of the heating assembly is wrapped by the insulating paper; the heat conduction assembly is arranged outside the heating core body and comprises two or more heat conduction pipes and a sealing plug, the inner diameters of the two or more heat conduction pipes are different, and the two or more heat conduction pipes are a d1 heat conduction pipe and a d2 heat conduction pipe to a dn heat conduction pipe in sequence from small to large, wherein n is an integer larger than or equal to 2, the d1 heat conduction pipe is sleeved outside the heating core body, the inner wall of the d1 heat conduction pipe is tightly contacted with the outer surface of the heating core body through a contraction pipe, and the d2 to the dn heat conduction pipes are sleeved outside the d1 heat conduction pipe in sequence from small to large; the sealing plugs are respectively arranged at two ends of the heating core body and used for forming a sealing space for the heating core body together with the heat conduction pipe; and the anticorrosive layer is sprayed on the surface of the outmost dn heat conduction pipe, which is in contact with the outside.
The beneficial effect of adopting above-mentioned technical scheme is: the PTC heater for the SPA in the prior art is fully considered to have the problems of poor corrosion resistance, poor insulation, high leakage safety risk and low heat transfer efficiency, more than two heat conduction pipes with different inner diameters are arranged in the heat conduction assembly, the heating core body is protected in a multilayer manner by sleeving the heat conduction pipes layer by layer, the d1 heat conduction pipe at the innermost layer is in close contact with the outer surface of the heating core body through a pressing and pipe shrinking process, and the thermal resistance caused by gaps is reduced as much as possible; the sealing plug is arranged to form a sealed space for the heating core body, so that external water is prevented from being immersed, the insulating property of the PTC heater is improved powerfully, and in addition, the corrosion resistance of the PTC heating pipe is obviously enhanced by spraying the anticorrosive layer on the surface of the outmost dn heat conduction pipe, which is in contact with the outside; the dn heat conducting pipe is not contracted or compressed, micro cracks do not exist on the surface, and the water of the SPA is effectively prevented from being immersed and corroded.
As a further improvement of the technical solution of the present invention, the heat conducting assembly is further provided with a potting adhesive with high thermal conductivity, and the potting adhesive is filled in gaps between the d1 heat conducting pipe and the d2 heat conducting pipe to the dn heat conducting pipe.
The beneficial effect of adopting above-mentioned technical scheme is: the setting of casting glue, through filling the clearance between the different layers of heat pipe, effectively reduce the thermal resistance that the clearance caused, promote heating efficiency.
As a further improvement of the technical scheme of the utility model, the clearance range between the d1 heat conduction pipe and the d2 heat conduction pipe to the dn heat conduction pipe is 0.1mm-1 mm.
The beneficial effect of adopting above-mentioned technical scheme is: the gap range is set between the heat conduction pipes of different layers in the optimal range, which is not only beneficial to the quick assembly of the heat conduction pipes and the improvement of the production efficiency of the PTC heater, but also beneficial to the injection of the pouring sealant and the maintenance of lower thermal resistance.
As a further improvement of the technical solution of the present invention, the thickness range of the d1 heat conduction pipe is 0.2mm-1.5 mm.
The beneficial effect of adopting above-mentioned technical scheme is: practice proves that when the thickness range of the innermost d1 heat conduction pipe is set to be 0.2mm-1.5mm, the heat conduction pipe not only can keep proper strength, but also is beneficial to being in close contact with the heating core body through pressing or shrinking.
As a further improvement of the technical scheme of the utility model, the thickness range of the dn heat conduction pipe is 0.2mm-2.5 mm.
The beneficial effect of adopting above-mentioned technical scheme is: in order to avoid the generation of microcracks on the surface, the outmost dn heat conduction pipe is not subjected to pipe shrinkage, so the strength of the dn heat conduction pipe is higher, compared with the heat conduction pipes of other layers, the thickness of the dn heat conduction pipe needs to be thickened properly, and the practice proves that the thickness range of the dn heat conduction pipe is 0.2mm-2.5mm, so that the dn heat conduction pipe can maintain enough strength and has good economy.
As a further improvement of the technical scheme of the utility model, the heat conduction pipe is an aluminum round pipe.
The beneficial effect of adopting above-mentioned technical scheme is: the aluminum round pipe is used as the heat conduction pipe, the characteristics of excellent heat conductivity, light weight and strong plasticity of the aluminum round pipe are fully utilized, the processing is easy, the heat conductivity of the heat conduction pipe is further improved, and the service life of the PTC heater is prolonged.
As a further improvement of the technical scheme of the utility model, the pouring sealant is silica gel.
The beneficial effect of adopting above-mentioned technical scheme is: silica gel is used as the pouring sealant, the high thermal conductivity and the thermal stability of the silica gel are fully utilized, the thermal resistance of the pouring sealant is reduced as far as possible while a good filling state is kept at a high temperature state, and the heat conduction efficiency from the heating core body to the outside is further improved.
As a further improvement of the technical scheme of the utility model, the anticorrosive layer is made of Teflon or epoxy resin or fluorocarbon resin or an anodic oxidation layer or electrophoretic paint.
The beneficial effect of adopting above-mentioned technical scheme is: the corrosion-resistant PTC heater takes the Teflon or the epoxy resin or the fluorocarbon resin or the anodic oxidation layer or the electrophoretic paint as an anticorrosive layer, fully utilizes the acid and alkali resistance and the corrosion resistance of various organic solvents of the Teflon, the epoxy and fluorocarbon resin, the anodic oxidation layer and the electrophoretic paint, and has the characteristic of high temperature resistance, effectively prevents the corrosion of the disinfectant water containing chloride ions or seawater containing various corrosive substances, further prolongs the service life of the PTC heater, and reduces the replacement frequency. In addition, other anticorrosive materials with similar characteristics can be used as the anticorrosive coating of the PTC heater, so that the anticorrosive performance of the PTC heater is effectively improved.
As a further improvement of the technical scheme of the utility model, the heating core body further comprises an aluminum foil, the number of the insulating paper layers is at least two, and the aluminum foil is arranged between the at least two insulating paper layers.
The beneficial effect of adopting above-mentioned technical scheme is: the number of layers that sets up insulating paper is two-layer at least, and sets up the aluminium foil between wherein two-layer insulating paper, but effective absorption and block the foreign particle to play the effect of protective insulation layer.
On the other hand, the utility model further discloses a PTC heater for the SPA pool, which comprises the PTC heater for the SPA in any one of the technical schemes.
The beneficial effect of adopting above-mentioned technical scheme is: including any one of the PTC heater for SPA in above-mentioned technical scheme, the PTC heater for SPA pond all can effectively solve prior art PTC heater for SPA's corrosion resistance poor, insulating persistence poor, the electric leakage risk is high, the big problem of thermal resistance, all can realize effectively promoting PTC heater's heating efficiency and life's purpose.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic sectional front view of a PTC heater according to the present invention;
FIG. 2 is a schematic cross-sectional view of a PTC heater according to the utility model;
FIG. 3 is a schematic cross-sectional view of another PTC heater according to the utility model;
the corresponding part names indicated by the numbers in the figures are as follows:
heating the core body 1; a PTC ceramic element (11); a metal electrode 12; an insulating paper 13; an aluminum foil 14; a heat conducting component 2; the heat conductive pipe 21; d1 heat pipe 211; d2 heat pipe 212; a dn heat pipe 213; a sealing plug 22; a tail sealing plug 221; a head seal 222; pouring sealant 23; and an anticorrosive layer 3.
Detailed Description
In order to facilitate an understanding of the utility model, the utility model will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the utility model is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In order to realize the purpose of the utility model, the technical scheme provided by the utility model is as follows:
in one aspect, as shown in fig. 1 and 3, in some embodiments of the present invention, in one aspect, the present invention discloses a PTC heater for SPA, comprising a heating core 1, a heat conducting member 2 and an anticorrosive layer 3, wherein the heating core 1 is a heating unit for converting electric energy into heat energy, and the heater core comprises a PTC ceramic element 11, a metal electrode 12 and an insulating paper 13; the PTC ceramic element 11 is arranged in the middle, the number of the metal electrodes 12 is two, the two metal electrodes 12 are respectively attached to two sides of the PTC ceramic element 11 to form a heating assembly with a circular cross section, and the periphery of the heating assembly is wrapped by the insulating paper 13; the heat conduction component 2 is arranged outside the heating core body 1 and comprises a heat conduction pipe 21 and a sealing plug 22, the heat conduction pipe 21 is more than two, the inner diameters of the more than two heat conduction pipes 21 are different, and the heat conduction pipes 211 of d1 and the heat conduction pipes 212 of d2 to the dn 213 are sequentially arranged from small to large according to the inner diameters, wherein n is an integer which is more than or equal to 2, the heat conduction pipe 211 of d1 is sleeved outside the heating core body 1, the inner wall of the heat conduction pipe 211 of d1 is tightly contacted with the outer surface of the heating core body 1 through a shrinkage pipe, and the heat conduction pipes 212 of d2 to the dn 213 are sequentially sleeved outside the heat conduction pipe 211 of d1 according to the inner diameters from small to large; the sealing plug 22 comprises a tail sealing plug 221 and a head sealing plug 222, the tail sealing plug 221 and the head sealing plug 222 are respectively arranged at the tail port and the head port of the heating core 1, and are used for constructing a sealing space for the heating core 1 together with the heat conduction pipe 21; the anticorrosive layer 3 is sprayed on the surface of the outermost dn heat transfer pipe 213 that contacts the outside.
The beneficial effect of adopting above-mentioned technical scheme is: the PTC heater for the SPA in the prior art is fully considered to have the problems of poor corrosion resistance, poor insulation, high leakage safety risk and low heat transfer efficiency, more than two heat conduction pipes 21 with different inner diameters are arranged in the heat conduction assembly 2, the heating core body 1 is protected in a multi-layer mode by sleeving the heat conduction pipes layer by layer, the d1 heat conduction pipe 211 at the innermost layer is in close contact with the outer surface of the heating core body 1, and the thermal resistance caused by gaps is reduced as much as possible; the sealing plug 22 is arranged to form a sealed space for the heating core 1, so that external water is prevented from entering the heating core, the insulating property of the PTC heater is improved powerfully, and in addition, the corrosion resistance of the PTC heating pipe is obviously enhanced by spraying the anticorrosive layer 3 on the surface of the outmost dn heat conduction pipe 213, which is in contact with the outside; the dn heat conduction pipe 213 is not contracted or pressed, and the surface has no micro-crack, thereby effectively preventing the water of SPA from immersing and corroding.
In other embodiments of the present invention, as shown in fig. 1-3, the heat conducting assembly 2 further comprises a potting adhesive 23, and the potting adhesive 23 is filled in the gaps between the d1 heat conducting pipes 211, the d2 heat conducting pipes 212 to the dn heat conducting pipes 213.
The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the potting adhesive 23 effectively reduces the thermal resistance caused by the gaps by filling the gaps between the heat conduction pipes 21 of different layers, and improves the heating efficiency.
In other embodiments of the present invention, the gaps between the d1 heat conductive pipes 211, the d2 heat conductive pipes 212, and the dn heat conductive pipe 213 are in the range of 0.1mm to 1 mm.
The beneficial effect of adopting above-mentioned technical scheme is: the gap range is set between the heat conduction pipes 21 of different layers in the preferred range, which is beneficial to the rapid assembly of the heat conduction pipes 21, the production efficiency of the PTC heater is improved, the pouring of the pouring sealant 23 is also beneficial, and the lower thermal resistance is kept.
In other embodiments of the present invention, the thickness of the d1 heat conductive pipe 211 ranges from 0.2mm to 1.5 mm.
The beneficial effect of adopting above-mentioned technical scheme is: practice proves that when the thickness of the innermost d1 heat conduction pipe 211 is set to be within the range of 0.2mm-1.5mm, the heat conduction pipe can not only maintain proper strength, but also be in close contact with the heating core body 1 through pressing or shrinking.
In other embodiments of the present invention, the dn heat conductive pipe 213 has a thickness ranging from 0.2mm to 2.5 mm.
The beneficial effect of adopting above-mentioned technical scheme is: in order to avoid the generation of micro cracks on the surface, the outermost dn heat pipe 213 is not shrunk, so the strength of the dn heat pipe 213 is required to be higher, and the thickness of the dn heat pipe 213 needs to be increased properly compared with the heat pipes 21 of other layers, and the thickness range of the dn heat pipe 213 is proved to be 0.2mm-2.5mm through practice, so that the dn heat pipe has good economy while maintaining sufficient strength.
In other embodiments of the present invention, the heat conductive pipes 21 are aluminum round pipes.
The beneficial effect of adopting above-mentioned technical scheme is: the aluminum round tube is used as the heat conducting tube 21, the characteristics of excellent heat conductivity, light weight and strong plasticity of the aluminum round tube are fully utilized, the processing is easy, the heat conductivity of the heat conducting tube 21 is further improved, and the service life of the PTC heater is prolonged.
In other embodiments of the present invention, the potting adhesive 23 is a silicone.
The beneficial effect of adopting above-mentioned technical scheme is: silica gel is used as the pouring sealant 23, so that the high thermal conductivity and the thermal stability of the silica gel are fully utilized, the thermal resistance of the pouring sealant 23 is reduced as far as possible while a good filling state is kept at a high temperature, and the heat conduction efficiency from the heating core body 1 to the outside is further improved.
In other embodiments of the present invention, the corrosion protection layer 3 is teflon or epoxy resin or fluorocarbon resin or anodic oxidation or electrophoretic paint.
The beneficial effect of adopting above-mentioned technical scheme is: the anticorrosive coating 3 is made of Teflon, epoxy resin, fluorocarbon resin, anodic oxidation or electrophoretic paint, the anticorrosive materials are fully utilized to resist acid, alkali and various organic solvents, and have the characteristic of high temperature resistance, so that the corrosion of disinfectant water containing chlorine ions or seawater containing various corrosive substances is effectively prevented, the service life of the PTC heater is further prolonged, and the replacement frequency is reduced. In addition, other anticorrosive materials with similar characteristics can be used as the anticorrosive coating 3 of the PTC heater, so that the anticorrosive performance of the PTC heater is effectively improved.
In other embodiments of the present invention, as shown in fig. 3, the heating core 1 further comprises an aluminum foil 14, the insulating paper 13 has at least two layers, and the aluminum foil 14 is disposed between the at least two layers of insulating paper 13.
The beneficial effect of adopting above-mentioned technical scheme is: the number of layers of the insulating paper 13 is at least two, and the aluminum foil 14 is arranged between the two layers of insulating paper 13, so that impurity particles can be effectively absorbed and blocked, and the insulating layer is protected.
In other embodiments of the utility model, the utility model further discloses a PTC heater for the SPA pool, which comprises the PTC heater for the SPA in any one of the technical schemes.
The beneficial effect of adopting above-mentioned technical scheme is: including any one of the PTC heater for SPA in above-mentioned technical scheme, the PTC heater for SPA pond all can effectively solve prior art PTC heater for SPA's corrosion resistance poor, insulating persistence poor, the electric leakage risk is high, the big problem of thermal resistance, all can realize effectively promoting PTC heater's heating efficiency and life's purpose.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (10)
1. A PTC heater for SPA is characterized in that the PTC heater comprises a heating core body, a heat conducting component and an anti-corrosion layer,
the heating core body is a heating unit used for converting electric energy into heat energy, and comprises a PTC ceramic element, a metal electrode and insulating paper; the PTC ceramic element is arranged in the middle, the number of the metal electrodes is two, the two metal electrodes are respectively attached to two sides of the PTC ceramic element to form a heating assembly with a circular cross section, and the insulating paper is wrapped on the periphery of the heating assembly;
the heat conduction assembly is arranged outside the heating core and comprises two or more heat conduction pipes and a sealing plug, the inner diameters of the two or more heat conduction pipes are different, the two or more heat conduction pipes are a d1 heat conduction pipe and a d2 to dn heat conduction pipe in sequence from small to large, wherein n is an integer larger than or equal to 2, the d1 heat conduction pipe is sleeved outside the heating core, the inner wall of the d1 heat conduction pipe is in close contact with the outer surface of the heating core, and the d2 to dn heat conduction pipes are sleeved outside the d1 heat conduction pipe in sequence from small to large; the sealing plugs are respectively arranged at two ends of the heating core body and used for forming a sealing space for the heating core body together with the heat conduction pipe;
and the anticorrosive layer is sprayed on the surface of the outmost dn heat conduction pipe, which is in contact with the outside.
2. The PTC heater for SPA according to claim 1, wherein said heat conducting assembly is further provided with a potting adhesive filling gaps between said d1 heat conducting tubes, d2 heat conducting tubes to dn heat conducting tubes.
3. A PTC heater for SPA according to claim 2 wherein the clearance between the d1, d2 to dn heat conductive tubes is in the range of 0.1mm-1 mm.
4. A PTC heater for SPA according to claim 1 wherein the thickness of the d1 heat conducting tube is in the range of 0.2mm to 1.5 mm.
5. A PTC heater for SPA according to claim 1 wherein the thickness of the dn heat pipe is in the range of 0.2mm to 2.5 mm.
6. A PTC heater for SPA according to claim 1 wherein the heat conductive tube is an aluminum round tube.
7. The PTC heater for SPA according to claim 2, wherein said potting adhesive is silicone.
8. A PTC heater for SPA according to claim 1 wherein the corrosion resistant layer is teflon or epoxy or fluorocarbon resin or anodized layer or an electrophoretic paint.
9. The PTC heater for SPA according to claim 1, wherein the heating core further comprises an aluminum foil, the insulating paper being at least two layers, the aluminum foil being disposed between the at least two layers of insulating paper.
10. A heater for SPA pools comprising the PTC heater for SPA according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122427465.3U CN216650013U (en) | 2021-10-09 | 2021-10-09 | PTC heater for SPA and heater for SPA pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122427465.3U CN216650013U (en) | 2021-10-09 | 2021-10-09 | PTC heater for SPA and heater for SPA pool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216650013U true CN216650013U (en) | 2022-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122427465.3U Active CN216650013U (en) | 2021-10-09 | 2021-10-09 | PTC heater for SPA and heater for SPA pool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216650013U (en) |
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2021
- 2021-10-09 CN CN202122427465.3U patent/CN216650013U/en active Active
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