CN218959146U

CN218959146U - PTC heater

Info

Publication number: CN218959146U
Application number: CN202223140202.5U
Authority: CN
Inventors: 康海标; 唐骐亮
Original assignee: Jiangsu Huitian Electromechanical Technology Co ltd
Current assignee: Jiangsu Huitian Electromechanical Technology Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-05-02
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a PTC heater, which comprises a shell and a heating element arranged in the shell, wherein a water inlet and a water outlet are formed in two ends of the shell, a spiral runner extending along the length direction of the heating element is arranged between the shell and the heating element, and two ends of the runner are respectively communicated with the water inlet and the water outlet. According to the PTC heater, the spiral flow channel is arranged between the shell and the heating element, so that water flows from the water inlet into the shell and then flows to the water outlet along the spiral direction of the flow channel, and the heating efficiency of the PTC heater is improved; meanwhile, the spiral flow passage can reduce the flow resistance of water flow and avoid vortex and dead angle of circulation of water flow.

Description

PTC heater

Technical Field

The utility model relates to the field of liquid heating, in particular to a PTC heater.

Background

At present, the liquid heater on the market mostly adopts an electric heating tube, and the electric heating tube is easy to condense scale so as to cause tube explosion and electric leakage, and meanwhile, the electric heating tube is easy to cause fire disaster once water is lack and dry burning.

In recent years, heating cores made of PTC ceramic materials have been gradually used, which have low surface temperatures, avoiding open flame hazards to some extent.

At present, a PTC heater for SPA bathing pools in the market mainly uses stainless steel, die-cast aluminum or extruded aluminum profiles as cavities, and most of the heater uses a plurality of heating core components or water circulation in the heater to increase heating efficiency.

Disclosure of Invention

In order to solve at least one technical problem of the prior art, the utility model provides a PTC heater.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: the PTC heater comprises a shell and a heating element arranged in the shell, wherein a water inlet and a water outlet are formed in two ends of the shell, a spiral runner extending along the length direction of the heating element is arranged between the shell and the heating element, and two ends of the runner are respectively communicated with the water inlet and the water outlet.

In some embodiments, the PTC heater further comprises a heat dissipation guide disposed within the housing and between an inner wall of the housing and the heating element, the heat dissipation guide being spirally wound around the outer circumference of the heating element along the length direction of the heating element, the housing, the heat dissipation guide and the heating element together defining the flow passage.

In some embodiments, the heat sink baffle is a spiral sheet of aluminum.

In certain embodiments, the heating element comprises a protective shell and a heating core disposed within the protective shell.

In certain embodiments, the protective shell is made of aluminum profile.

In some embodiments, the heating core includes an upper electrode sheet, a lower electrode sheet, a plurality of PTC ceramic sheets arranged between the upper electrode sheet and the lower electrode sheet in a length direction, and insulating adhesive tape wrapped outside the upper electrode sheet, the lower electrode sheet, and the PTC ceramic sheets.

In some embodiments, at least one end of the heating core is connected with a connecting terminal, and the connecting terminal is connected with the upper electrode plate and the lower electrode plate respectively.

In some embodiments, the housing is further provided with an element interface, the end of the heating element provided with the connection terminal extends out of the housing from the element interface, and a first sealing element is arranged between the element interface and the heating element.

In some embodiments, the PTC ceramic sheet is connected to the upper electrode sheet and the lower electrode sheet through high temperature silica gel.

In some embodiments, the heating element further comprises a heat conducting metal piece, the heat conducting metal piece is arranged between the protective shell and the heating core, the heat conducting metal piece comprises an upper metal piece and a lower metal piece, a cylinder is formed by combining the upper metal piece and the lower metal piece, the upper metal piece and the lower metal piece are provided with a flat plate surface, and a groove for accommodating the heating core is formed in the flat plate surface.

The utility model has the beneficial effects that:

because the spiral flow channel is arranged between the shell and the heating element, water flows from the water inlet to the water outlet along the spiral direction of the flow channel after flowing into the shell, and the heating efficiency of the PTC heater is improved; meanwhile, the spiral flow passage can reduce the flow resistance of water flow and avoid vortex and dead angle of circulation of water flow.

Drawings

Fig. 1 is a schematic view showing the structure of a PTC heater according to the present utility model;

fig. 2 is an exploded view of components of a PTC heater according to the present utility model;

fig. 3 is an exploded view of the components of a heating element of a PTC heater according to the present utility model.

Symbol description:

the solar cell comprises a shell 1, a water inlet 11, a water outlet 12, an element interface 13, a heating element 2, a PTC ceramic sheet 21, an upper electrode sheet 22, a lower electrode sheet 23, insulating adhesive tape 24, a wiring terminal 25, a protective shell 26, a connecting seat 22, a heat dissipation guide 3, a first sealing element 4 and a second sealing element 5.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and detailed description thereof, which are simplified schematic drawings which illustrate only the basic structure of the utility model and therefore show only those features which are relevant to the utility model, it being noted that embodiments and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways that are different than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1 to 3, there is provided a PTC heater comprising a housing 1 and a heating element 2 provided in the housing 1, both ends of the housing 1 are provided with a water inlet 11 and a water outlet 12, the water inlet 11 and the water outlet 12 are communicated with an internal cavity of the housing 1, a flow passage extending in a length direction of the heating element 2 is provided between the housing 1 and the heating element 2, and both ends of the flow passage are respectively communicated with the water inlet 11 and the water outlet 12.

In some embodiments, the PTC heater further comprises a heat dissipation guide 3 disposed in the housing 1 and located between the inner wall of the housing 1 and the heating element 2, wherein the heat dissipation guide 3 is spirally wound around the outer circumference of the heating element 2 along the length direction of the heating element 2, and the housing 1, the heat dissipation guide 3 and the heating element 2 together define the flow channel. Preferably, the heat dissipation guide 3 is a spiral aluminum sheet.

The heat dissipation guide piece 3 is arranged in the shell 1, so that on one hand, the circulation direction of water flow can be changed, the water flow flows from the water inlet 11 to the water outlet 12 along the spiral direction of the heat dissipation guide piece 3, the water flow can exchange heat with the heating core as much as possible, and the heating efficiency of the PTC heater is improved; on the other hand, the heat dissipation guide piece 3 can also reduce the resistance of water flow, and the vortex and the circulation dead angle generated by the water flow are avoided.

In certain embodiments, the heating element 2 includes a protective housing 26 and a heating core disposed within the protective housing 26, the protective housing 26 being configured to isolate water flow from contact with the heating core while also protecting the heating core when the heating element 2 is subjected to an external force. Preferably, the protective shell 26 is made of aluminum profile.

In some embodiments, the heating core includes an upper electrode sheet 22, a lower electrode sheet 23, a plurality of PTC ceramic sheets 21 arranged between the upper electrode sheet 22 and the lower electrode sheet 23 in a length direction, and insulating adhesive paper 24 wrapped outside the upper electrode sheet 22, the lower electrode sheet 23, and the PTC ceramic sheets 21 are connected to the upper electrode sheet 22 and the lower electrode sheet 21 through high-temperature silica gel. At least one end of the heating core is connected with a wiring terminal 25, and the wiring terminal 25 is respectively connected with the upper electrode plate 22 and the lower electrode plate 23.

In some embodiments, the housing 1 is further provided with an element interface 13, and the end of the heating element 2 provided with the connection terminal 25 extends out of the housing 1 from the element interface 13, and a first sealing element 4 is arranged between the heating element 2 and the element interface 13.

In some embodiments, the heating element 2 further includes a heat conducting metal member 27 disposed in the protective case 26, the heat conducting metal member 27 being disposed between the protective case 26 and the heating core, the heat conducting metal member 27 including an upper metal member and a lower metal member, the upper metal member and the lower metal member being combined to form a cylinder, each of the upper metal member and the lower metal member having a flat plate surface provided with a groove for accommodating the heating core, the groove being a rectangular groove extending in a length direction of the heat conducting metal member 27.

In certain embodiments, the housing 1 is further provided with a second sealing element 5 at the water inlet 11 and the water outlet 12. The first sealing element 4 and the second sealing element 5 are sealing rings, sealing gaskets or sealing glue.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to the embodiments described above will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The PTC heater is characterized by comprising a shell and a heating element arranged in the shell, wherein a water inlet and a water outlet are formed in two ends of the shell, a spiral runner extending along the length direction of the heating element is arranged between the shell and the heating element, and two ends of the runner are respectively communicated with the water inlet and the water outlet.

2. A PTC heater according to claim 1,

the PTC heater further comprises a heat dissipation guide piece which is arranged in the shell and located between the inner wall of the shell and the heating element, the heat dissipation guide piece is spirally wound on the periphery of the heating element along the length direction of the heating element, and the shell, the heat dissipation guide piece and the heating element jointly define the flow channel.

3. A PTC heater according to claim 2, wherein,

the heat dissipation guide piece is a spiral aluminum sheet.

4. A PTC heater according to claim 1,

the heating element comprises a protective shell and a heating core arranged in the protective shell.

5. A PTC heater according to claim 4,

the protective housing is made of aluminum profiles.

6. A PTC heater according to claim 4, wherein

The heating core comprises an upper electrode plate, a lower electrode plate, a plurality of PTC ceramic plates which are arranged between the upper electrode plate and the lower electrode plate along the length direction, and insulating gummed paper which wraps the outer sides of the upper electrode plate, the lower electrode plate and the PTC ceramic plates.

7. A PTC heater according to claim 6, wherein,

and at least one end of the heating core is connected with a wiring terminal, and the wiring terminal is respectively connected with the upper electrode plate and the lower electrode plate.

8. A PTC heater according to claim 7,

the shell is also provided with an element interface, one end of the heating element, provided with the wiring terminal, extends out of the shell from the element interface, and a first sealing element is arranged between the element interface and the heating element.

9. A PTC heater according to claim 6, wherein,

the PTC ceramic plate is connected with the upper electrode plate and the lower electrode plate through high-temperature silica gel.

10. A PTC heater according to claim 4,

the heating element further comprises a heat conduction metal piece, the heat conduction metal piece is arranged between the protective shell and the heating core, the heat conduction metal piece comprises an upper metal piece and a lower metal piece, a cylinder is formed after the upper metal piece and the lower metal piece are combined, the upper metal piece and the lower metal piece are provided with a flat plate surface, and a groove for accommodating the heating core is formed in the flat plate surface.