WO2015184859A1

WO2015184859A1 - Instant heating-type ptc liquid heater

Info

Publication number: WO2015184859A1
Application number: PCT/CN2015/072745
Authority: WO
Inventors: 徐伟
Original assignee: 上海帕克热敏陶瓷有限公司
Priority date: 2014-06-03
Filing date: 2015-02-11
Publication date: 2015-12-10
Also published as: CN105318551A

Abstract

An instant heating-type PTC liquid heater, comprising a cylindrically-shaped heating core (1), the heating core (1) being made by fitting together at least two electric heating mechanisms (7). An electric heating mechanism (7) comprises a PTC ceramic composition (8) and a bearing shell-shaped aluminium profile (9). A heating hole (10) is arranged in the aluminium profile (9). The PTC ceramic composition (8) is arranged in the heating hole (10). Bearing shell inner arcs (21) of at least two bearing shell-shaped aluminium profiles (9) form an inner tube hole (11). A flow-guiding inner tube (12) is arranged within the inner tube hole (11). A flow-guiding outer tube (6) is arranged on the outside of the heating core (1). The flow-guiding outer tube (6) is connected to the flow-guiding inner tube (12).

Description

Instant heat PTC liquid heater

Technical field

The invention relates to the field of thermal ceramics, in particular to an instant PTC liquid heater.

Background technique

Traditional instant heaters have the following hot modes:

1. Use electric heating tube as electric heating element, that is, use spiral electric heating wire to place in metal tube, then fill MgO Powder, encapsulated by shrink tube.

This conventional electric heating tube has some inherent disadvantages. When the heat of the external heat of the electric heating tube is not effectively dissipated, the internal temperature is too high, which easily causes the electric heating wire to be blown. In addition, when the electric heating pipe is working, the surface temperature will be high, and even in the case of no water, it will even be red, and there is a great safety hazard.

2. Using PTC as the heating element, the PTC ceramic is fixed in a square hole of the aluminum profile, PTC The heat generated by the ceramic is transferred to the water pipe of the aluminum alloy through the aluminum alloy. This structure is due to the adoption of PTC. Ceramics are used as electric heating elements, and the heater does not generate overheating. However, since aluminum alloy is used as the water pipe, the water pipe is easily corroded by water, and finally the heater is damaged, and the water is also contaminated by the aluminum alloy.

See the invention patent publication number of CN203492219U

Therefore, an instant PTC liquid heater is particularly needed to solve the problems in the prior art.

technical problem

The instant PTC liquid heater has a large safety hazard and a short service life.

Technical solution

In order to achieve the above object, the technical solution of the present invention is as follows:

An instant PTC a liquid heater comprising a cylindrical heating core, wherein the heating core is provided with an inner tube hole, the inner tube hole is provided with a flow guiding inner tube; and the heating core is provided with a guiding outer tube, the guiding The flow tube communicates with the inner tube of the flow guide, and the liquid heated by the heating core circulates between the outer tube of the flow guide and the inner tube of the flow guide.

In the present invention, the outer flow guiding tube is formed by a large tube sleeve disposed outside the medium tube, and the heating core is disposed in the medium tube through the thermal conductive silica; the heating core is composed of at least two electric heating mechanisms. Composed together, the electrothermal mechanism includes A PTC ceramic combination and a bush-shaped aluminum profile, wherein the aluminum profile is provided with a heating hole, and the heating hole is provided with a PTC ceramic combination, and the inner arc of the bearing bush of the at least two bush-shaped aluminum profiles constitutes an inner tube hole.

In the present invention, the number of the electrothermal mechanisms is four.

In the present invention, the medium tube and the inner tube of the flow guide are respectively made of stainless steel.

In the present invention, the large tube is made of stainless steel or plastic.

In the present invention, the outer tube baffle and the inner tube baffle are respectively disposed in the outer flow guiding tube and the inner guiding tube.

In the present invention, the PTC ceramic combination includes a PTC ceramic, an upper electrode sheet, and a lower electrode sheet, the PTC Upper and lower electrode sheets are respectively disposed on the upper and lower portions of the ceramic, and the PTC ceramic combination is disposed in the heating hole through the insulating paper.

In the present invention, the PTC The upper end surface and the lower end surface of the ceramic are respectively bonded to the upper electrode sheet and the lower electrode sheet by silica gel, the width of the upper electrode sheet being equal to the width of the PTC ceramic, and the width of the lower electrode sheet being equal to the width of the PTC ceramic.

In the present invention, the PTC When the ceramic is disposed in the heating hole through the insulating paper, the maximum movable gap width of the upper or lower inner side of the upper or lower electrode sheet and the heating hole is smaller than the width of the electrode remaining edge on the PTC ceramic.

In the present invention, the PTC Each of the corners of the ceramic is provided with a circular arc transition, and the upper electrode sheet and the lower electrode sheet are respectively rectangular in shape, and each of the upper and lower electrode sheets has a circular arc transition.

Beneficial effect

1, using PTC Ceramics, even at too low a voltage, or too high voltage, the power of the heater will not rise significantly, have a certain constant power characteristics, and will not be damaged; due to PTC Ceramics have constant temperature heating characteristics. Even in the case of dry burning in air, the maximum temperature of the heater surface is 250 degrees or less, which will not cause oxidation of the metal tube and will not cause burning of surrounding materials.

2, using the baffle to achieve the design of the rotating water flow, can fully dissipate heat;

3, the use of a circular arc aluminum structure, greatly reducing the distance between the PTC ceramic and the outer metal tube, so that PTC The heat of the ceramic is quickly transferred to the outside for a large power output;

4, using stainless steel pipe as a water pipe to avoid corrosion of aluminum alloy;

5, using 2 or more PTC Aluminum heater structure, it is also possible to use multiple stainless steel tube heaters in series and parallel to achieve high power or large flow water heating;

6. Use a wide electrode piece such as PTC ceramic to make the edge of the electrode piece exceed PTC The edge of the ceramic surface electrode, thereby avoiding arc generation, greatly improving the insulation reliability and prolonging the service life of the heater;

7. The maximum movable gap width of the upper or lower electrode and the left or right inner side of the heating hole is smaller than PTC. The width of the electrode on the ceramic, the arbitrarily oscillating PTC ceramic combination in the heating hole does not expose the electrode on the PTC ceramic.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

2 is a schematic structural view of a heating core of the present invention;

3 is a schematic structural view of an electrothermal mechanism of the present invention;

Figure 4 is a schematic structural view of an aluminum profile of the present invention;

Figure 5 is a schematic structural view of a PTC ceramic combination of the present invention;

Figure 6 is a schematic view showing the position and structure of the deflector of the present invention;

Fig. 7 is a structural schematic view showing the width of the motor leaving edge of the present invention.

Among them: 1, heating core; 2, medium-sized tube; 3, large tube; 4, diversion inner tube; 5, thermal silica gel; 7、Electrical heating mechanism; 8、 PTC ceramic combination; 9、aluminum profile; 10、heating hole; 11、inner tube hole; 12、introduction inner tube; 13、outer tube deflector; 14 , PTC ceramic; 15 , upper electrode sheet; 16 , lower electrode sheet; 17 , insulating paper; 18 , electrode edge width; 19 , PTC ceramic surface electrode; 20 , silica gel; , inner shaft of bearing bush 22, inner tube deflector.

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the invention

The invention will be further described below in conjunction with the embodiments shown in the drawings.

Example

Referring to Figures 1 to 7, an instant PTC liquid heater comprising a cylindrical heating core 1 and a medium tube 2 , large pipe 3 and diversion inner pipe 4 , heating core 1 is set in the medium pipe 2 through the thermal silica gel 5 , and the large pipe 3 is arranged on the outer side of the medium pipe 2 , so that the medium pipe 2 and the large pipe 3 A flow guiding outer tube 6 is formed between them; the heating core 1 is formed by a combination of at least two electrothermal mechanisms 7 , three or more in a preferred embodiment, and the electrothermal mechanism 7 includes a PTC ceramic combination 8 And the bush-shaped aluminum profile 9 , the aluminum profile 9 is provided with a heating hole 10 , the heating hole 10 is provided with a PTC ceramic combination 8 , and the number of at least three bush-shaped aluminum profiles 9 The number of the at least two inner arcs of the bearing bush is 21 sets of inner tube holes 11 , the inner tube hole 11 is provided with a diversion inner tube 12 ; the outer tube 6 is connected with the inner tube 12 of the guide tube; the electric heating mechanism 7 The circular aluminum heater structure is adopted; the heat generated by the PTC ceramic 14 is transmitted to the medium tube 2, the large tube 3 and the inner tube 4 through the circular arc electric heating body 4 The surface realizes rapid heat transfer between the plane and the arc; the electric heating mechanism 7 is surrounded by water and belongs to the internal heat structure, which is beneficial to improve the thermal efficiency.

The number of the electrothermal mechanisms 7 is four, which is a preferred embodiment of the present invention.

Medium tube 2 and inner tube 12 Made of stainless steel, it is not easily corroded by water, will not cause damage to the heater, and avoid water pollution.

Large tube 3 Made of stainless steel or plastic, stainless steel has high stability, plastic material has low cost, and can be selectively used according to working conditions to achieve better use.

The outer tube baffle 13 and the inner tube baffle 22 are respectively disposed in the outer tube 6 and the inner tube 12 of the diversion tube, and the water is guided from the inner tube 12 The inner tube baffle 22 is rotated downward and heated by the inner side of the stainless steel tube, and then rotated from the outer tube 6 through the outer tube baffle 13 to be heated upward through the stainless steel tube to finally flow out; The direction indicated by the middle arrow is the direction of water flow. The present invention employs double heating to enable the full utilization of thermal resources through the externally disposed outer tube deflector 13 and the inner tube baffle 22 On the one hand, the liquid can be moved quickly, on the other hand, it can also be stirred, so that the heating is more uniform, no precipitation, and the purpose of cleaning and high efficiency is achieved; in the alternative of the invention, water can enter from the outer tube 6 Diversion inner tube 12 , can achieve the effect of improving thermal efficiency.

PTC ceramic combination 8 includes PTC ceramic 14, upper electrode sheet 15 and lower electrode sheet 16, PTC ceramic The upper electrode sheet 15 and the lower electrode sheet 16 are disposed on the upper and lower portions, respectively, and the PTC ceramic combination 8 is disposed in the heating hole 10 through the insulating paper 17.

The upper end surface and the lower end surface of the PTC ceramic 14 are bonded to the upper electrode sheet 15 and the lower electrode sheet 16 by silica gel 20, respectively. The width of the upper electrode sheet 15 is equal to the width of the PTC ceramic 14, and the width of the lower electrode sheet 16 is equal to the width of the PTC ceramic 14; and the PTC ceramic 14 is used. The upper electrode sheet 15 and the lower electrode sheet 16 of equal width make the edge of the electrode sheet beyond the edge of the PTC ceramic surface electrode 19, thereby avoiding arc generation, greatly improving insulation reliability, and achieving the service life of the heater. More than 300,000 times.

When the PTC ceramic 14 is placed in the heating hole 10 through the insulating paper 17, the upper electrode sheet 15 or the lower electrode sheet 16 The maximum movable gap width with the left inner side or the right inner side of the heating hole 10 is smaller than the electrode leaving side width 18 on the PTC ceramic 14; the PTC ceramic surface electrode is provided on the PTC ceramic 14 19, PTC ceramic surface electrode 19 is not completely covered in the upper or lower part of PTC ceramic 14, PTC ceramic surface electrode 19 is set in PTC ceramic 14 The middle portion of the upper portion and the middle portion of the lower portion, therefore, on the PTC ceramic 14, a certain margin is left on both sides of the PTC ceramic surface electrode 19, that is, the margin on both sides is the width of the electrode leaving edge 18 .

Each corner of the PTC ceramic 14 is provided with a circular arc transition, the upper electrode sheet 15 and the lower electrode sheet 16 The shapes are respectively rectangular, and the respective corners of the upper electrode tab 15 and the lower electrode tab 16 are respectively provided with a circular arc transition; in the embodiment, the upper electrode tab 15, the lower electrode tab 16, and the PTC ceramic 14 The arc transitions are of uniform size to achieve a neat technical effect; in a preferred alternative, the arc transition of the upper electrode sheet 15 and the lower electrode sheet 16 is greater than the arc transition of the PTC ceramic 14.

The above description of the embodiments is intended to facilitate the understanding and use of the invention by those skilled in the art. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the general principles described herein can be applied to other embodiments without the inventive work. Therefore, the present invention is not limited to the embodiments described above, and those skilled in the art should be able to make modifications and changes within the scope of the invention without departing from the scope of the invention.

Industrial applicability

Sequence table free content

Claims

1, an instant PTC a liquid heater, comprising: a cylindrical heating core, wherein the heating core is provided with an inner tube hole, the inner tube hole is provided with a flow guiding inner tube; and the heating core is provided with a guiding outer tube The flow guiding outer tube communicates with the inner flow guiding tube, and the liquid heated by the heating core circulates between the outer guiding outer tube and the inner guiding tube.

2. A novel instant PTC according to claim 1 a liquid heater, characterized in that: the outer flow tube is formed by a large tube sleeve disposed outside a medium tube, and the heating core is disposed in the medium tube through a thermal conductive silica; the heating core is made up of at least two The electrothermal mechanism is assembled, and the electrothermal mechanism comprises a PTC ceramic combination and a bush-shaped aluminum profile, wherein the aluminum profile is provided with a heating hole, and the heating hole is provided with a PTC In the ceramic combination, the inner arc of the bearing bush of the number of at least two bearing-shaped aluminum profiles constitutes the inner tube hole.

3. An instant PTC liquid heater according to claim 2, wherein the number of said electrothermal mechanisms is 4 One.

4. An instant PTC according to claim 3 The liquid heater is characterized in that: the medium-sized tube and the inner tube of the flow guide are respectively made of stainless steel.

5. An instant PTC according to claim 4 A liquid heater characterized in that the large pipe is made of stainless steel or plastic.

6. An instant PTC according to any one of claims 1 to 5. The liquid heater is characterized in that an outer tube baffle and an inner tube baffle are respectively disposed in the outer flow guiding tube and the inner guiding tube.

7. An instant PTC liquid heater according to claim 6 wherein said PTC ceramic combination comprises a PTC The ceramic, the upper electrode sheet and the lower electrode sheet, the upper and lower portions of the PTC ceramic are respectively provided with an upper electrode sheet and a lower electrode sheet, and the PTC ceramic combination is disposed in the heating hole through the insulating paper.

8. An instant PTC liquid heater according to claim 7, wherein: said PTC The upper end surface and the lower end surface of the ceramic are respectively bonded to the upper electrode sheet and the lower electrode sheet by silica gel, the width of the upper electrode sheet being equal to the width of the PTC ceramic, the width of the lower electrode sheet and the PTC The width of the ceramic is equal.

9. An instant PTC liquid heater according to claim 7, wherein: said PTC When the ceramic is disposed in the heating hole through the insulating paper, the maximum movable gap width of the upper or lower electrode sheet of the upper or lower electrode sheet and the heating hole is smaller than that of the PTC The width of the electrode on the ceramic.

10. An insulated PTC heater according to claim 9, wherein: said PTC Each of the corners of the ceramic is provided with a circular arc transition, and the upper electrode sheet and the lower electrode sheet are respectively rectangular in shape, and each of the upper and lower electrode sheets has a circular arc transition.