CN216752122U

CN216752122U - PTC ceramic heating constant temperature type safety protection type electric hot plate

Info

Publication number: CN216752122U
Application number: CN202123420837.6U
Authority: CN
Inventors: 梁世飞
Original assignee: Dandong Quanpu Science And Technology Development Co ltd
Current assignee: Dandong Quanpu Science And Technology Development Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-14
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a PTC ceramic heating constant-temperature safety protection type electric heating plate which comprises a heat dissipation surface layer, a polyurethane foam heat insulation layer and a moisture-proof back plate; a plurality of PTC ceramic sheet heating elements are uniformly embedded on the upper end surface of the polyurethane foam heat-insulation layer; each PTC ceramic sheet heating element is respectively connected with a zero line and a live line in a power line through leads; a circuit breaking protector is arranged on a zero line in the power line; the upper part of each PTC ceramic sheet heating element is correspondingly stuck with an anti-leakage metal film patch which is electrically connected with a ground wire in a power line; the insulating heat conduction material layer is integrally covered above the anti-creeping metal film patches and is arranged between the heat dissipation surface layer and the anti-creeping metal film patches. The utility model can automatically keep the temperature at the set value without overheating, and has the characteristics of energy saving, safety, long service life and the like.

Description

PTC ceramic heating constant temperature type safety protection type electric hot plate

Technical Field

The utility model relates to the technical field of electric heating plates, in particular to a PTC ceramic heating constant-temperature safety protection type electric heating plate.

Background

The heat dissipation surface of a common electric heating plate is generally a metal plate, and the interior of the common electric heating plate is made of polyurethane foam materials, and the common electric heating plate mainly plays roles in heat insulation and plate body support. However, the heating wire of the conventional electric heating plate is usually a metal heating cable or a carbon fiber heating cable, which is attached to the inner side of the metal plate. The heating wire has small heating area and high power density per unit area, the surface temperature of the heating body can reach more than 60 ℃ after being electrified, local high temperature can be caused by long-time local covering, potential safety hazards such as human body scalding can be caused if the temperature is low, and serious accidents such as fire caused by objects such as silk fabrics or cotton quilts and the like and even electric shock of the human body can be caused if the temperature is high, so that an automatic temperature controller is generally required to be installed. However, the heating wire and the automatic temperature controller in the electric heating plate are easy to damage, and the heating wire and the automatic temperature controller need to be replaced after being partially damaged, so that the use and maintenance cost is increased, and in addition, once the automatic temperature controller fails, the temperature of the electric heating plate is easy to be rapidly accumulated and increased, and accidents are caused.

Therefore, there is a need for an improved electric heating plate to overcome the corresponding technical drawbacks.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a PTC ceramic heating constant temperature type safety protection electric heating plate, which has the following specific technical scheme:

a PTC ceramic heating constant-temperature safety protection type electric heating plate comprises a heat dissipation surface layer, a polyurethane foam heat insulation layer and a moisture-proof back plate, wherein the polyurethane foam heat insulation layer is wrapped and fixed by the downward bent end part of the heat dissipation surface layer, and the moisture-proof back plate is fixed on the polyurethane foam heat insulation layer and the lower part of the bent end part of the heat dissipation surface layer; a plurality of PTC ceramic sheet heating elements are uniformly embedded on the upper end face of the polyurethane foam heat-insulation layer, and the resistance value mutation temperature of the PTC ceramic sheet heating elements is 30-45 ℃; each PTC ceramic sheet heating element is respectively connected with a zero line and a live line in a power line through leads, and the power line extends into a junction box positioned above the heat dissipation surface layer and is electrically connected with a power line plug; a circuit breaking protector is arranged on a zero line in the power line; the upper part of each PTC ceramic sheet heating element is correspondingly adhered with an anti-leakage metal film patch which is electrically connected with a ground wire in the power line; the insulating heat conduction material layer is integrally covered above the anti-creeping metal film patches and is arranged between the heat dissipation surface layer and the anti-creeping metal film patches.

By adopting the technical scheme, the PTC ceramic sheet heating element with the resistance mutation temperature within the range of 30-45 ℃ is adopted, heat is dissipated through the heat dissipation surface layer, and the heating mode is a direct heating type. The PTC ceramic sheet heating element can adjust the resistance according to the temperature of the body, so that the temperature can be kept constant at a set value, overheating is avoided, the PTC ceramic sheet heating element has the characteristics of energy conservation, safety, long service life and the like, does not emit light when working, does not have open fire or oxygen consumption, and has an automatic constant temperature function.

Meanwhile, in order to solve the safe and reliable problem of using the PTC ceramic sheet heating element on the electric hot plate, avoid the breakdown leakage, make the outer cover electrified, the utility model has covered a insulating heat-conducting material layer wholly above multiple anti-leakage metal film paster, make PTC ceramic sheet heating element not contact with heat-dissipating surface directly; meanwhile, the upper part of each PTC ceramic sheet heating element is correspondingly adhered with an anti-leakage metal film patch, so that leakage current can be directly transmitted to the ground wire through the anti-leakage metal film patch to trigger the circuit breaker to cut off the power even if the leakage is broken.

Preferably, the plurality of PTC ceramic sheet heating elements are vertically arranged on the polyurethane foam heat-insulation layer along the long side direction of the PTC ceramic sheet heating elements, and a plurality of rows are arranged.

Preferably, a plurality of PTC ceramic sheet heating elements are transversely arranged on the polyurethane foam heat insulation layer along the long side direction of the PTC ceramic sheet heating elements, and a plurality of rows are arranged.

Preferably, the wire is a high temperature resistant wire.

Preferably, the insulating and heat conducting material layer is a silicon gel mold or a PET film.

Preferably, the heat dissipation surface layer is a metal plate layer.

Preferably, the circuit breaker protector is a circuit breaker or a fuse.

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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of one embodiment of a PTC ceramic heating constant temperature type safety protection electric heating plate according to the present invention.

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.

Fig. 3 is an enlarged schematic view of a circled portion in fig. 2.

Fig. 4 is a schematic layout view of a PTC ceramic sheet heating element according to another embodiment of the constant-temperature safety protection type electric heating plate for PTC ceramic heating of the present invention.

In the figure: 1-radiating surface layer, 2-polyurethane foam heat-insulating layer, 3-moisture-proof back plate, 4-PTC ceramic sheet heating element, 5-anti-creeping metal film patch, 6-insulating heat-conducting material layer, 7-lead, 8-zero line, 9-live line, 10-ground line, 11-circuit breaker and 12-junction box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 1-3, the PTC ceramic heating constant-temperature safety protection type electric heating plate of the present invention includes a heat dissipation surface layer 1, a polyurethane foam heat insulation layer 2 and a moisture-proof back plate 3. The heat dissipation surface layer 1 in the present embodiment is preferably a metal plate layer.

Polyurethane foam thermal-insulation layer 2 is fixed by the tip parcel that the cooling surface layer 1 buckled downwards, and dampproofing backplate 3 is fixed in polyurethane foam thermal-insulation layer 2 and the lower part of the 1 tip of buckling of cooling surface layer.

A plurality of PTC ceramic sheet heating elements 4 are uniformly embedded on the upper end face of the polyurethane foam heat-insulation layer 2, and the resistance value mutation temperature of the PTC ceramic sheet heating elements 4 is 30-45 ℃.

The PTC ceramic sheet heating element 4 used in the embodiment has no open fire during working, and is safe to use; the temperature is quickly raised after the electrification; the resistance of the device changes along with the change of temperature, can automatically balance a certain temperature, does not need to be additionally provided with a temperature control circuit, and is particularly suitable for the working condition of working at a fixed temperature; and after the temperature is balanced, the resistance becomes very large, the consumed power is very small, and the device belongs to an energy-saving product and has the characteristics of energy conservation, safety and long service life.

As shown in fig. 1, in the present embodiment, the plurality of PTC ceramic sheet heating elements 4 are arranged in the following manner: the PTC ceramic sheet heating elements 4 are vertically arranged on the polyurethane foam heat-insulation layer 2 along the long side direction and are arranged in multiple rows.

And each PTC ceramic sheet heating element 4 is respectively connected with a zero line 8 and a live line 9 in a power wire through a lead 7, and the power wire extends into a junction box 12 positioned above the heat dissipation surface layer 1 and is electrically connected with a power wire plug. The wire 7 is preferably a high-temperature-resistant wire to ensure a long life.

A circuit breaker protector 11, such as a circuit breaker or fuse, is mounted on the neutral wire 8 in the power cord. The short-circuit protector 11 is additionally arranged on the main power supply circuit, so that the problem of short circuit caused by the breakdown and burning of the PTC ceramic sheet heating element 4 can be solved.

The upper part of each PTC ceramic sheet heating element 4 is correspondingly pasted with an anti-creeping metal film patch 5, the anti-creeping metal film patch 5 is electrically connected with a ground wire 10 in a power line, if the PTC ceramic sheet heating element 4 breaks down to leak electricity, the leakage current can be directly transmitted to the ground wire 10 through the anti-creeping metal film patch 5, and the circuit breaking protector 11 is triggered to break the electricity.

The insulating heat conduction material layer 6 is also integrally covered above the anti-creeping metal film patches 5, and the insulating heat conduction material layer 6 is arranged between the heat dissipation surface layer 1 and the anti-creeping metal film patches 5.

The insulating and heat conducting material layer 6 is generally made of a material having good insulating properties and good heat conductivity, such as a silicone mold or a PET film. By additionally arranging the insulating heat-conducting material layer 6, the PTC ceramic sheet heating element 4 is not directly contacted with the metal plate layer, so that the phenomenon that the shell of the metal plate layer is electrified due to breakdown and electric leakage of the PTC ceramic sheet heating element 4 can be avoided.

Example 2:

the structure in this embodiment is substantially the same as that in embodiment 1, except that, as shown in fig. 4, the plurality of PTC ceramic sheet-like heating elements 4 in this embodiment are arranged in the following manner: the PTC ceramic sheet heating elements 4 are transversely arranged on the polyurethane foam heat-insulation layer 2 along the long side direction and are arranged in a plurality of rows.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments 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 invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The PTC ceramic heating constant-temperature safety protection type electric heating plate is characterized by comprising a heat dissipation surface layer (1), a polyurethane foam heat insulation layer (2) and a moisture-proof back plate (3), wherein the polyurethane foam heat insulation layer (2) is wrapped and fixed by the downward bent end part of the heat dissipation surface layer (1), and the moisture-proof back plate (3) is fixed on the polyurethane foam heat insulation layer (2) and the lower part of the bent end part of the heat dissipation surface layer (1); a plurality of PTC ceramic sheet heating elements (4) are uniformly embedded on the upper end face of the polyurethane foam heat-insulation layer (2), and the resistance value mutation temperature of the PTC ceramic sheet heating elements (4) is 30-45 ℃; each PTC ceramic sheet heating element (4) is respectively connected with a zero line (8) and a live line (9) in a power line through a lead (7), and the power line extends into a junction box (12) positioned above the heat dissipation surface layer (1) and is electrically connected with a power line plug; a circuit breaking protector (11) is arranged on a zero line (8) in the power line; the upper part of each PTC ceramic sheet heating element (4) is also correspondingly adhered with an anti-leakage metal film patch (5), and the anti-leakage metal film patch (5) is electrically connected with a ground wire (10) in the power line; a plurality of anti-leakage metal film patches (5) are integrally covered with an insulating heat conduction material layer (6), and the insulating heat conduction material layer (6) is arranged between the heat dissipation surface layer (1) and the anti-leakage metal film patches (5).

2. A PTC ceramic heating thermostatic safety protection type electric heating plate according to claim 1, wherein a plurality of PTC ceramic sheet heating elements (4) are vertically arranged on the polyurethane foam heat insulating layer (2) along the long side direction thereof, and are provided in a plurality of rows.

3. A PTC ceramic heating thermostatic safety protection type electric heating plate as claimed in claim 1, wherein a plurality of PTC ceramic sheet heating elements (4) are arranged in a row in the longitudinal direction thereof in the polyurethane foam heat insulating layer (2).

4. A PTC ceramic heating thermostatic safety protection type electric heating plate according to any one of claims 1-3, characterized in that the lead (7) is a high temperature resistant lead.

5. A PTC ceramic heating thermostatic safety protection type electric heating plate according to any one of claims 1-3, characterized in that the insulating and heat conducting material layer (6) is a silicon mold or a PET film.

6. A PTC ceramic heating thermostatic safety protection type electric heating plate according to any one of claims 1-3, characterized in that the heat dissipation surface layer (1) is a metal plate layer.

7. A PTC ceramic heating thermostatic safety protection type electric heating plate according to any one of claims 1-3, characterized in that the cut-off protector (11) is a circuit breaker or a fuse.