CN112770428A

CN112770428A - Central heating device, heating rod and liquid heater

Info

Publication number: CN112770428A
Application number: CN202110095584.5A
Authority: CN
Inventors: 田峰业
Original assignee: Shenzhen Safevalue Technology Co ltd
Current assignee: Shenzhen Safevalue Technology Co ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-05-07

Abstract

The invention discloses a central heating device, which comprises a plurality of PTC heating elements and conductive fixing seats, wherein each PTC heating element comprises two heating surfaces which are oppositely arranged; the conductive fixing seat is fixedly connected and conducted with the heating surface in a bonding mode, an electrode coating is arranged on the heating surface, the conductive fixing seat comprises a heat conducting surface and a binding surface attached to the heating surface, and an electrode lead is arranged on the conductive fixing seat. The invention also discloses a heating rod and a liquid heater. Compared with the prior art, the heating surface both sides at PTC heating element are to setting up electrically conductive fixing base to the effect that acts as the plate electrode, thereby simplified the structure, and electrically conductive fixing base still is used for fixing PTC heating element, sets up insulating heat conduction material between shell and built-in heating device, thereby passes to the shell through insulating heat conduction material with the heat, under equal heating power, and heating effect is better.

Description

Central heating device, heating rod and liquid heater

Technical Field

The invention relates to a heating device, in particular to a central heating device, a heating rod and a liquid heater.

Background

At present, an existing heating rod generally adopts an electric heating wire as a heating element, magnesium oxide powder with thermal conductivity is added into a pipe body to fill a space between the pipe body and the electric heating wire, and because the position of the electric heating wire in the pipe body is difficult to determine, temperature difference is easy to occur on the heating rod, namely, different positions of the pipe body have different heat, so that heating effect is uneven and poor, and the electric heating wire cannot be burnt in a dry state in use, so that the water level in a water tank or a liquid heater needs to be ensured to be capable of completely or partially soaking the heating rod all the time; if the situation of insufficient water supply occurs, the heating rod is overheated and turns red, even the heating rod is burst, which not only easily causes fire, but also endangers personal safety.

Disclosure of Invention

The invention aims to provide a central heating device, a heating rod and a liquid heater, and aims to solve the technical problems of improving the heating effect of liquid, reducing energy consumption and having high safety.

In order to solve the problems, the invention adopts the following technical scheme: a mid-set heating device comprises a plurality of PTC heating elements and conductive fixing seats, wherein the PTC heating elements are sequentially arranged, each PTC heating element comprises two oppositely arranged heating surfaces, and the conductive fixing seats are symmetrically arranged on the two heating surfaces of each PTC heating element so that the PTC heating elements are clamped between the two conductive fixing seats; the conductive fixing seat is fixedly connected and conducted with the heating surface in a bonding mode, an electrode coating is arranged on the heating surface, the conductive fixing seat comprises a heat conducting surface and a binding surface attached to the heating surface, and an electrode lead is arranged on the conductive fixing seat.

Further, the conductive fixing seat is made of an aluminum alloy material.

Furthermore, a lead through groove arranged along the length direction of the conductive fixing seat is formed in the heat conducting surface, and the electrode lead is arranged in the lead through groove.

The invention also discloses a heating rod, which comprises a shell, wherein the middle heating device is arranged in the shell, the shell is provided with an inner cavity, the shell is provided with an opening communicated with the inner cavity, an insulating heat conduction material is filled between the middle heating device and the inner cavity of the shell so as to enable the shell, the middle heating device and the insulating heat conduction material to be in close contact, an electrode lead is led out of the shell through the opening of the shell, two ends of the middle heating device are respectively provided with an insulating limiting piece so as to enable the middle heating device and the shell to be arranged on the same axis, and one end of the opening of the shell is also provided with an insulating sealant.

Further, the insulating heat conduction material is magnesium oxide powder.

Further, the housing is made of a stainless steel material.

The invention also discloses a liquid heater, which comprises a heating container and the middle heating device, wherein the middle heating device is fixed in the heating container, a shell is arranged outside the middle heating device, the shell is provided with an inner cavity, the shell is provided with an opening communicated with the inner cavity, insulating heat conduction materials are filled between the middle heating device and the inner cavity of the shell so as to enable the shell, the middle heating device and the insulating heat conduction materials to be in close contact, an electrode lead is led out of the shell through the opening of the shell, two ends of the middle heating device are respectively provided with an insulating limiting piece so as to enable the middle heating device and the shell to be arranged on the same axis, and one end of the opening of the shell is also provided with insulating sealant.

Further, the insulating heat conduction material is magnesium oxide powder.

Further, the housing is made of a stainless steel material.

Compared with the prior art, the PTC heating element has the advantages that the conductive fixing seats are oppositely arranged on the two sides of the heating surface of the PTC heating element to serve as the electrode plates, so that the structure is simplified, the conductive fixing seats are also used for fixing the PTC heating element, and the conductive fixing seats and the PTC heating element form a column shape after being fixed, so that the heating is more uniform; the middle-mounted heating device is used in the heating rod, the insulating heat conduction material is arranged between the shell and the middle-mounted heating device, so that heat is transferred to the shell through the insulating heat conduction material, the heating effect is better under the same heating power, and the safety is high because the PTC heating element is adopted, the temperature can be automatically controlled, the heating can be carried out in a dry burning mode, and no over-temperature risk exists.

Drawings

Fig. 1 is a schematic structural view of a first mid-type heating device according to the present invention.

Fig. 2 is a sectional view taken along a-a in fig. 1.

Fig. 3 is a schematic view of a first mid-type heating device of the present invention in a heating rod.

Fig. 4 is a sectional view taken along the direction B-B in fig. 3.

Fig. 5 is a schematic structural view of the liquid heater of the present invention.

Fig. 6 is a schematic structural diagram of the thermally conductive holder of the present invention.

Fig. 7 is a schematic structural view of a second mid-type heating device according to the present invention.

Fig. 8 is a schematic view of the structure of the PTC heating element of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the present invention discloses a mid-positioned heating device, which comprises a plurality of PTC heating elements 1 and conductive holders 2, wherein the PTC heating elements 1 are sequentially arranged in a straight line, the PTC heating elements 1 are sheet-shaped structures, the PTC heating elements 1 comprise two oppositely arranged heating surfaces 11 and side edges (shown in fig. 8) arranged at one circumference of the heating surfaces 11, electrode coatings are coated on the heating surfaces 11, and the conductive holders 2 are symmetrically arranged on the two heating surfaces 11 of the PTC heating elements 1 so as to clamp the PTC heating elements 1 between the two conductive holders 2; the conductive fixed seat 2 and the heating surface 11 are fixedly connected and conducted in a bonding mode; as shown in fig. 6, the cross section of the conductive fixing base 2 is semi-arc-shaped, the conductive fixing base 2 may be a hollow or solid structure, and is preferably solid, the conductive fixing base 2 includes a heat conducting surface 21 and an attaching surface 22 attached to the heat generating surface 11, an electrode lead 23 is disposed on the conductive fixing base 2, the electrode lead 23 is electrically connected to the conductive fixing base 2, and the electrode lead 23 may be connected and fixed to the conductive fixing base 2 by welding or crimping.

As shown in fig. 2, the conductive holders 2 are columnar, and when the two conductive holders 2 are assembled with the PTC heating element 1, an integrated columnar structure is formed; the conductive fixed seat 2 is made of an aluminum alloy material.

In the invention, the conductive fixing seat 2 and the heating surface 11 are connected, fixed and conducted in a bonding manner, specifically, a high-temperature curing adhesive with the thickness of less than 0.05mm is brushed on the bonding surface 22 of the conductive fixing seat 2, then the bonding surface 22 and the heating surface 11 are bonded with each other and heated to cure the high-temperature curing adhesive, the high-temperature curing adhesive is an insulating adhesive, and a metal coating on the heating surface 11 is an uneven coating surface, so that when the metal coating is bonded with the bonding surface 22, part of bulges of the metal coating can pierce the high-temperature curing adhesive and contact the bonding surface 22 to realize conduction, and meanwhile, the safety problems of short circuit and the like caused by the side conduction of the PTC heating element 1 due to the adhesive overflow problem when the conductive curing adhesive is adopted are prevented.

According to the invention, the conductive fixing seat 2 is used as the electrode plate to replace the traditional electrode plate as the conductive electrode, and the fixing effect is achieved, so that on the premise of not reducing the heating effect, the number of parts is reduced, the conductive fixing seat 2 is arranged in a columnar shape, the uniform heat conduction can be ensured, and the conductive fixing seat and the shell can be conveniently connected and fixed.

As shown in fig. 2, in order to facilitate assembly of the electrode lead 23, a lead through groove 24 is formed in the heat conducting surface 21 along the length direction of the conductive fixing base 2, the lead through groove 24 penetrates through end surfaces of two ends of the conductive fixing base 2, and the electrode lead 23 is disposed in the lead through groove 24; specifically, the lead through groove 24 is disposed at the center of the heat conducting surface 21, and the lead through groove 24 is arc-shaped, and the radian of the lead through groove 24 is the same as that of the wire core of the electrode lead 23, so that the wire core of the electrode lead 23 is just placed in the lead through groove 24, and the electrode lead 23 is led out from one end of the lead through groove 24.

As shown in fig. 1, 2 and 3, as a first mid-heating device of the present invention, the cross-sectional shape of the conductive holder 2 is a semicircle, wherein the heat conducting surface 21 is formed on a curved surface, and the attaching surface 22 is formed on a straight edge of the semicircle.

Of course, the cross section of the conductive fixing base 2 may also be rectangular (shown in fig. 7), wherein two corners located on the long side of the same side are arc transition sides, the heat conducting surface 21 is formed on the long side and the arc transition sides, and the attaching surface 22 is disposed on the long side of the other side.

As shown in fig. 6, as an embodiment of the present invention, the width a of the conductive holder 2 is 15mm, and as shown in fig. 2, the thickness b of the PTC heating element 1 is 2.0-3.0mm, and the width c is 15 mm.

As shown in fig. 2 and 3, the present invention also discloses a heating rod, which comprises a housing 4, wherein the central heating device 100 is disposed in the housing 4, and the structure of the central heating device is described in detail above, and therefore will not be described again; the shell 4 is provided with an inner cavity, an opening communicated with the inner cavity is formed in the shell 4, the axis of the central heating device 100 and the axis of the shell 4 are arranged on the same straight line, the insulating heat conduction material 3 is filled between the central heating device and the inner cavity of the shell 4, so that the shell 4, the central heating device and the insulating heat conduction material 3 are in close contact, the electrode lead 23 is led out of the shell 4 through the opening of the shell 4, the two ends of the central heating device 100 are respectively provided with an insulating limiting part 5, so that the central heating device 100 is limited in the center of the shell 4, the central heating device and the shell 4 are arranged on the same axis, and the opening of the shell 4 is further provided with an insulating sealant 6, so that water is prevented from entering the shell 4.

As shown in fig. 2 or fig. 7, the cross-sectional shape of the central heating device 100 is adapted to the cross-sectional shape of the inner cavity of the housing 4, so that the central heating device 100 can be easily assembled, and specifically, the cross-sectional shape of the central heating device 100 is substantially the same as the cross-sectional shape of the inner cavity of the housing 4, and the cross-sectional shape is different from the cross-sectional shape of the inner cavity of the housing 4, so as to ensure that the linear distance between the central heating device 100 and the inner cavity of the housing 4 is substantially equal, and the heating.

As shown in fig. 4, two limiting members 5 are provided with grooves 51 adapted to the cross-sectional shape of the central heating device 100, so that the limiting members 5 are fixed to the two ends of the central heating device 100 through the grooves 51 in an inserting manner, and the limiting members 5 opposite to the electrode leads 23 are provided with lead holes 52 through which the electrode leads extend.

As shown in fig. 3 and 4, the insulating and heat conducting material 3 is magnesium oxide powder, and the magnesium oxide powder is filled and compacted between the outer shell 4 and the central heater.

In the present invention, the housing 4 is made of stainless steel material, and the housing 4 is tubular and has an opening at one end thereof as a closed surface.

As shown in fig. 4 and 5, the present invention discloses a liquid heater, which comprises a heating container 200 and the central heating device 100, and since the structure of the central heating device 100 has been described in detail, it will not be described again; the middle-placed heating device 100 is externally provided with a shell 4, the shell 4 is provided with an inner cavity, the shell 4 is provided with an opening communicated with the inner cavity, the axis of the middle-placed heating device 100 and the axis of the shell 4 are arranged on the same straight line, an insulating heat conduction material 3 is filled between the middle-placed heating device and the inner cavity of the shell 4, so that the shell 4, the middle-placed heating device and the insulating heat conduction material 3 are in close contact, an electrode lead 23 is led out of the shell 4 through the opening of the shell 4, two ends of the middle-placed heating device 100 are respectively provided with an insulating limiting piece 5, so that the middle-placed heating device 100 is limited on the center of the shell 4, the middle-placed heating device and the shell 4 are arranged on the same axis, and an insulating sealant 6 is further arranged on the opening of the shell 4, so as to prevent water from entering.

The central heating means 100 in the liquid heater may be provided in plurality. The present invention is not limited thereto and the central heating device 100 may also be used for gas heating.

The PTC heating element fixing structure has the advantages that the conductive fixing seat is arranged to serve as an electrode plate, so that the structure is simplified, the conductive fixing seat is also used for fixing the PTC heating element, and the heat conducting surface of the conductive fixing seat is arc-shaped, so that heating can be more uniform; the middle-arranged heating device is used in the heating rod, the insulating heat conduction material is arranged between the shell and the middle-arranged heating device, the fact that an insulating film is not needed to be reused for coating is achieved, materials are saved, meanwhile, the heat conduction effect is better, heat is transferred to the shell through the insulating heat conduction material, under the same heating power, the heating effect is better compared with a traditional PTC heater or a heating wire, the PTC heating element is adopted, automatic temperature control can be achieved, dry burning can be achieved, no over-temperature risk exists, and therefore safety is high.

Claims

1. A central heating device, characterized by: the PTC heating element comprises a plurality of PTC heating elements (1) and conductive fixing seats (2), wherein the PTC heating elements (1) are sequentially arranged, the PTC heating elements (1) comprise two oppositely-arranged heating surfaces (11), and the conductive fixing seats (2) are symmetrically arranged on the two heating surfaces (11) of the PTC heating elements (1) so that the PTC heating elements (1) are clamped between the two conductive fixing seats (2); electrically conductive fixing base (2) and generate heat and connect fixedly and switch on through the mode of bonding between face (11), be equipped with electrode coating on face (11) of generating heat, electrically conductive fixing base (2) are equipped with electrode lead (23) on electrically conductive fixing base (2) including heat conduction face (21) and with binding face (22) of face (11) laminating of generating heat.

2. The central heating device according to claim 1, wherein: the conductive fixing seat (2) is made of an aluminum alloy material.

3. The central heating device according to claim 1, wherein: the heat conducting surface (21) is provided with a lead through groove (24) arranged along the length direction of the conductive fixing seat (2), and the electrode lead (23) is arranged in the lead through groove (24).

4. A heating rod comprising a housing (4), characterized in that: the central heating device according to any one of claims 1 to 3 is arranged in the shell (4), the shell (4) has an inner cavity, an opening communicated with the inner cavity is arranged on the shell (4), an insulating heat conduction material (3) is filled between the central heating device and the inner cavity of the shell (4) so as to enable the shell (4), the central heating device and the insulating heat conduction material (3) to be in close contact, the electrode lead (23) is led out of the shell (4) through the opening of the shell (4), two ends of the central heating device are respectively provided with an insulating limiting piece (5) so as to enable the central heating device and the shell (4) to be arranged on the same axis, and an insulating sealant (6) is further arranged at one end of the opening of the shell (4).

5. A heating rod according to claim 4, wherein: the insulating heat conduction material (3) is magnesium oxide powder.

6. A heating rod according to claim 4, wherein: the shell (4) is made of stainless steel materials.

7. A liquid heater comprising a heating vessel, characterized in that: further comprising a central heating means according to any of claims 1-3, the central heating means being fixed in the heating vessel, a shell (4) is arranged outside the middle-positioned heating device, the shell (4) is provided with an inner cavity, an opening communicated with the inner cavity is arranged on the shell (4), an insulating heat conduction material (3) is filled between the middle-positioned heating device and the inner cavity of the shell (4), so that the shell (4), the middle heating device and the insulating heat conduction material (3) are in close contact, the electrode lead (23) is led out of the shell (4) through the opening of the shell (4), two ends of the central heating device are respectively provided with an insulated limiting piece (5) so as to arrange the central heating device and the shell (4) on the same axis, an insulating sealant (6) is also arranged at one end of the opening of the shell (4).

8. The liquid heater of claim 7, wherein: the insulating heat conduction material (3) is magnesium oxide powder.

9. The liquid heater of claim 7, wherein: the shell (4) is made of stainless steel materials.