CN209787482U

CN209787482U - Submerged high-power PTC liquid heater

Info

Publication number: CN209787482U
Application number: CN201822273760.6U
Authority: CN
Inventors: 吴家财
Original assignee: Ningbo Suni Electronics Co Ltd
Current assignee: Ningbo Suni Electronics Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2019-12-13
Anticipated expiration: 2028-12-29

Abstract

The utility model relates to a high-power PTC liquid heater of formula of diving, including the tubular metal resonator, set up inflation body and the PTC heating member in the tubular metal resonator. The PTC heating body is arranged at the periphery of the expansion body and is tightly attached to the inner wall of the metal pipe under the extrusion action of the expansion body. The utility model provides a high-power PTC liquid heater of dive formula simple structure, heat transfer efficiency height, power are big, small, the heating uniformity is good and the stable performance.

Description

submerged high-power PTC liquid heater

Technical Field

The utility model relates to a high-power PTC liquid heater of formula of diving.

Background

At present, the liquid heating, that is, the electric water heater industry generally adopts the electric heating pipe for heating, but the electric heating pipe can not realize the temperature automatic control, and after the water is dried, the surface temperature can sharply rise, and then cause the burnout of electrothermal tube, and short service life, the security is poor. Although a great deal of PTC liquid heaters appearing in the existing market are applied to the fields of household appliances, new energy vehicles, heating and the like, the defects that the traditional electric heating tube cannot realize temperature self control and power self regulation, has no open fire when generating heat, poor safety, short service life and the like are overcome, and the application and popularization of the PTC liquid heaters are hindered due to the defects that the heat transfer mode is unreasonable, the volume is large, the power is small, the power is not easy to control and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a high-power PTC liquid heater that generates heat and heat conduction efficiency is higher, the application is wider, the volume is littleer is provided to above-mentioned prior art.

the utility model provides a technical scheme that above-mentioned problem adopted does: a submerged high-power PTC liquid heater comprises a metal pipe and is characterized in that: the PTC heater also comprises an expansion body and a PTC heating body which are arranged in the metal tube; the PTC heating body is arranged at the periphery of the expansion body and is tightly attached to the inner wall of the metal pipe under the extrusion action of the expansion body.

Optionally, the PTC heating body includes m and the expansion body includes n, where m and n are both natural numbers.

in order to ensure that the water leakage phenomenon of the PTC heating body is avoided, a sealing element is arranged at the first end of the metal tube, and the second end of the metal tube (1) is arranged in a fully-closed mode.

In order to facilitate the fixed installation of the submersible high-power PTC liquid heater, a bolt is sleeved outside the first end of the metal pipe.

In order to facilitate installation, the bolt comprises a threaded portion for connection and a clamping portion protruding out of the outer wall of the threaded portion in the radial direction, clamping planes which are arranged oppositely are arranged on the outer periphery of the clamping portion, and a groove for placing a sealing ring is formed in the end face, close to one end of the threaded portion, of the clamping portion.

In order to guarantee better heat transfer effect, and then improve heating power, the axial extension setting of tubular metal resonator is followed to the PTC heating member, the arc just matches with the inner wall laminating of tubular metal resonator is personally submitted to the outer wall of PTC heating member.

The PTC heating body comprises a heating core and a section bar;

The heating core comprises a PTC electric heating element, an electrode plate, a lead and an insulating film;

the section bar is arranged along the axial direction of the metal tube, an axial through hole is arranged in the section bar, and the heating core is arranged in the through hole in a matching way;

The insulating film is arranged on the periphery of the PTC electric heating element, an electrode plate connected with the conducting wires is arranged between the PTC electric heating element and the insulating film, and the two conducting wires are led out from the first end of the metal tube.

optionally, the metal tube is a circular tube, a square tube, a triangular tube, an elliptical tube, a polygonal tube, or a special-shaped tube.

Compared with the prior art, the utility model has the advantages of: the utility model provides a high-power PTC liquid heater of dive formula simple structure utilizes the inflation body to push up the PTC heating member on the inner wall of tubular metal resonator. The submerged high-power PTC liquid heater has high heat transfer efficiency, and heat generated by the PTC heating body can be quickly transferred to the metal tube in a short distance. The submerged high-power PTC liquid heater has high power, the PTC heating bodies are arranged on the inner wall of the metal tube and cling to the periphery of the metal tube, and the power is improved by 2-5 times compared with that of the conventional PTC liquid heater. The submersible high-power PTC liquid heater is small in size, the defect that only one PTC heater is installed in one metal pipe in the prior art is overcome, and the size of the heater with the same power is reduced by 2-3 times. The submerged high-power PTC liquid heater has good consistency, and the power consistency and the performance are stable because the PTC heating body is tightly attached to the inner wall of the metal tube.

Drawings

Fig. 1 is a perspective view of a submersible PTC liquid heater according to an embodiment of the present invention.

Fig. 2 is a perspective view of another angle of the submersible PTC liquid heater according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a submersible PTC liquid heater according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 3, the submersible high-power PTC liquid heater in the present embodiment includes a metal pipe 1, a PTC heating body 2, an expansion body 4, and a bolt 5.

Wherein, tubular metal resonator 1 is a long banding body, and this tubular metal resonator 1's length and direct heating power demand as required carry out concrete setting. In addition, the metal pipe 1 can be round, square, triangular, elliptical, polygonal and special-shaped pipes as required.

The PTC heating body 2 and the expansion body 4 are both arranged in the metal tube 1. The number of the PTC heaters 2 is specifically set according to the required heating power. The number of the PTC heaters 2 may be set to any natural number. In this embodiment, two PTC heaters 2 are disposed and uniformly distributed in the metal tube 1. The number of the expansion bodies 4 can also be set to be any natural number according to requirements, and the expansion bodies 4 in the embodiment can be expansion tubes or expansion rods.

The PTC heating body 2 extends along the axial direction of the metal tube 1, and the whole PTC heating body 2 is in a strip shape. PTC heating member 2 distributes and sets up in the periphery of inflation body 4 to PTC heating member 2 can hug closely on the inner wall of tubular metal resonator 1 under the extrusion of inflation body 4, and the outer wall of PTC heating member 2 is the arc and matches with the inner wall laminating of tubular metal resonator 1, so extrusion through inflation body 4 and the inseparable laminating of the inner wall of tubular metal resonator 1, conveniently directly pass to tubular metal resonator 1 with the heat that PTC heating member 2 produced. The remaining space phase-match of the inside metal pipe is looked to the quantity that sets up of inflation body 4, and inflation body 4 is provided with two in this embodiment, and inflation body 4 is hollow body, has certain deformability, and then makes things convenient for it to install, also makes to exert its bulging after the installation and presses the effect.

The PTC heating body 2 in the present embodiment includes a heat generating core and a profile 25. The profile 25 in this embodiment is made of aluminum profile, but other profiles may be used as needed. The heating core comprises a PTC electric heating element 21, an electrode plate 22, a lead 23 and an insulating film 24. The section bar 25 is arranged along the axial direction of the metal tube 1, an axial through hole 251 is arranged in the section bar 25, and the heating core is arranged in the through hole 251 in a matching way. An insulating film 24 is provided on the outer periphery of the PTC heating element 21, and an electrode plate 22 of the connecting lead 23 is provided between the PTC heating element 21 and the insulating film 24. The insulating film 24 can effectively ensure safe use of the PTC heater 2. The lead 23 of the PTC heating body 2 in this embodiment is extended out from the first end of the metal tube 1, so as to be electrically connected to an external power supply.

The two ends of the metal pipe 1 are sealed, wherein the first end of the metal pipe 1 is sealed by a sealing element or sealant. And the second end of the metal tube 1 is arranged in a totally closed way, so that a totally closed end is formed. Therefore, the two ends of the metal tube 1 are effectively sealed, and the situation that the heating liquid enters the metal tube 1 to cause the damage of the PTC heating body is avoided.

The first end of the metal pipe 1 is sleeved with a bolt 5. The bolt 5 comprises a thread part 51 for connection and a clamping part 52 which protrudes outwards from the outer wall of the thread part 51 in the radial direction, the clamping part is not positioned at the outer end of the thread part 51, the clamping part 52 is provided with clamping planes which are oppositely arranged on the periphery, and a groove 53 for placing a sealing ring is arranged on the end surface of the clamping part 52 close to one end of the thread part 51. When the submersible high-power PTC liquid heater needs to be installed, the clamping portion 52 is clamped by a wrench, and then the clamping portion is fixed on the installation plate of the container through the thread portion 51 of the bolt 5, and meanwhile, a sealing ring is arranged in the groove 53, so that the sealing between the clamping portion 52 and the installation plate is realized, namely the sealing between the submersible high-power PTC liquid heater and the installation plate is realized.

The utility model provides a high-power PTC liquid heater of formula of diving installs PTC heating member 2 in the tubular metal resonator to utilize the inflation body 4 with its roof pressure on the inner wall of tubular metal resonator 1, so on the heat that PTC heating member 2 produced can directly transmit tubular metal resonator 1, when this high-power PTC liquid heater of formula of diving placed in waiting the liquid of heating, can heat liquid. In addition, the PTC is directly attached to the inner wall of the metal tube 1, so that the heat transfer distance of the PTC heating body 2 is reduced, the heat transfer speed is increased, and the heating efficiency of the PTC heating body is improved.

Claims

1. A submersible high power PTC liquid heater comprising a metal tube (1), characterized in that: the PTC heater also comprises an expansion body (4) arranged in the metal tube (1) and a PTC heating body (2); the PTC heating body (2) is arranged at the periphery of the expansion body (4) and is tightly attached to the inner wall of the metal pipe (1) under the extrusion action of the expansion body (4).

2. A submersible high power PTC liquid heater according to claim 1, wherein: the PTC heating body (2) comprises m expansion bodies (4) and n expansion bodies, wherein m and n are natural numbers.

3. A submersible high power PTC liquid heater according to claim 1, wherein: the sealing device is characterized in that a sealing element is arranged at the first end of the metal pipe (1), and the second end of the metal pipe (1) is arranged in a fully-closed mode.

4. A submersible high power PTC liquid heater according to claim 3, wherein: and a bolt (5) is sleeved outside the first end of the metal pipe (1).

5. The submersible high power PTC liquid heater according to claim 4, wherein: the bolt (5) comprises a threaded portion (51) used for connection and a clamping portion (52) protruding outwards from the outer wall of the threaded portion (51) in the radial direction, the periphery of the clamping portion (52) is provided with oppositely arranged clamping planes, and a groove (53) used for placing a sealing ring is formed in the end face, close to one end of the threaded portion (51), of the clamping portion (52).

6. A submersible high power PTC liquid heater according to claim 1, wherein: PTC heating member (2) set up along the axial extension of tubular metal resonator (1), the outer wall of PTC heating member (2) and tubular metal resonator (1) is personally submitted the arc and is mated with the inner wall laminating of tubular metal resonator (1).

7. A submersible high power PTC liquid heater according to claim 1, wherein: the PTC heating body (2) comprises a heating core and a section bar (25);

The heating core comprises a PTC electric heating element (21), an electrode plate (22), a lead (23) and an insulating film (24);

The section bar (25) is arranged along the axial direction of the metal pipe (1), an axial through hole (251) is formed in the section bar (25), and the heating core is arranged in the through hole (251) in a matching manner;

An insulating film (24) is arranged on the periphery of the PTC electric heating element (21), an electrode plate (22) connected with a lead (23) is arranged between the PTC electric heating element (21) and the insulating film (24), and the two leads (23) are led out from the first end of the metal tube (1).

8. A submersible high power PTC liquid heater according to claim 1, wherein: the metal pipe (1) is a circular pipe, a square pipe, a triangular pipe, an oval pipe or a polygonal pipe.