CN213462374U

CN213462374U - PTC heater and power consumption protection device of small-size household electrical appliances

Info

Publication number: CN213462374U
Application number: CN202022351085.1U
Authority: CN
Inventors: 吴翔; 闻俊涛; 鄂新刚
Original assignee: SHENZHEN SHARING ELECTRONICS CO Ltd
Current assignee: SHENZHEN SHARING ELECTRONICS CO Ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-06-15
Anticipated expiration: 2030-10-20

Abstract

The utility model discloses a PTC heater and small-size household electrical appliances use electric protection device, PTC heater include the casing and generate heat the core, generate heat the core and set up inside the casing, generate heat the core and include the shell, install at the inside a plurality of PTC heating elements of shell, set up the electrode slice at PTC heating element upper and lower both ends, wrap up first insulation layer and the second insulating layer on PTC heating element and electrode slice in proper order, are provided with the ground plane between first insulation layer and the second insulating layer. A double-insulation structure is adopted, so that a better insulation effect is achieved; meanwhile, the grounding layer is arranged in the heating core body, leakage current possibly generated by the heater is introduced underground, accidents such as personal electric shock and fire possibly caused are avoided, and the safety performance of the heater is improved.

Description

PTC heater and power consumption protection device of small-size household electrical appliances

Technical Field

The utility model relates to a heating technology field, concretely relates to PTC heater and small-size household electrical appliances's power consumption protection device.

Background

PTC heaters are a popular type of electrical heating device in the world. The device is used for heating, preserving heat and heating flowing liquid and gaseous media. When the heating medium passes through the heating cavity of the electric heater under the action of pressure, the fluid thermodynamic principle is adopted to uniformly take away huge heat generated in the working process of the electric heating element, so that the temperature of the heated medium meets the process requirements of users.

In the conventional technology, a PTC heater is generally provided with only one insulating member in a heating assembly, as shown in fig. 1-3, the structural schematic diagram of a heating core body adopted in the PTC heater of the prior art includes a PTC heating element, an electrode plate and a first insulating layer, only one insulating member is provided in the heating core body of the PTC heater, although the insulating function can be achieved in most cases, unexpected situations, such as seal aging caused by long-term use of the heater, water permeating into the PTC heater and the electrode plate, circuit leakage caused by electric leakage, and safety accidents caused by long-term use of the heater, cannot be ignored; meanwhile, the PTC heater in the prior art does not perform grounding treatment on the heating assembly, and is easy to cause electric leakage accidents.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to solve the problem that the heater leaks electricity easily and causes safety accidents in the prior art.

In order to realize the technical problem, the utility model provides a heater that security performance is good.

The utility model adopts the technical proposal that: the utility model discloses a casing and the core that generates heat, its characterized in that: the heating core body is arranged inside the shell and comprises a shell, a plurality of PTC heating elements arranged inside the shell, electrode plates arranged at the upper end and the lower end of each PTC heating element, a first insulating layer and a second insulating layer, wherein the first insulating layer and the second insulating layer are sequentially wrapped on the PTC heating elements and the electrode plates, and a grounding layer is arranged between the first insulating layer and the second insulating layer.

Optionally, a plurality of the PTC heating elements are arranged in series in the axial direction of the housing.

Optionally, one end of the housing is open and is an open end, the other end of the housing is closed and is a closed end, a sealing element tightly matched with the open end is arranged on the open end, a threading hole is formed in the closed end, and a connecting wire of the electrode plate and the ground layer is led out from the closed end through the threading hole.

Optionally, the ground layer is a ground metal sheet disposed between the first insulating layer and the second insulating layer, and the metal sheet is an aluminum foil or a copper foil.

Optionally, the material of the housing is an aluminum material with good thermal conductivity.

Optionally, a sealing conduit pipe for sealing an assembly gap between the threading hole and the connecting wire is arranged in the threading hole.

Optionally, the material of the sealing element is rubber with good elasticity.

Optionally, the utility model discloses a heater still includes first heat conduction support and second heat conduction support, first heat conduction support and second heat conduction support set up after connecting through the elastic component the inside of casing, and with the inner wall of casing closely laminates, the core setting of generating heat is in first heat conduction support with the inside of second heat conduction support.

Optionally, the casing includes cylinder cavity and ring flange, cylinder cavity one end opening sets up, and the other end sets up of remaining silent the opening one end welding of cylinder cavity has the ring flange, be provided with a plurality of mounting holes that are used for external fixation on the ring flange, the material of casing is the stainless steel that corrosion resistance is strong.

The utility model also provides a small-size household electrical appliances's power consumption protection device, the device includes the PTC heater.

According to the technical scheme, the heater has the advantages and positive effects that: the utility model adopts a double insulation structure as a first heavy anti-creeping measure, and tightly wraps the electrode slice through the first insulation layer and the second insulation layer to play a better insulation role; meanwhile, a ground layer is arranged in the heating core body to be used as a second protection against electric leakage, and the leakage current possibly generated by the heater is introduced underground. Therefore, the utility model discloses an above-mentioned duality earth leakage protection measure, the emergence of accidents such as conflagration, explosion that avoids the human body electric shock and probably takes place that can be fine. The PTC heater provided by the utility model is applied to small household appliance series products such as hair straightener, garment steamer and SPA, and the power consumption safety performance of the product is provided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

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, and it is obvious for a person skilled in the art that other drawings can be obtained according to the drawings without inventive exercise:

FIG. 1 schematically illustrates a front view of a prior art heat generating core;

FIG. 2 schematically illustrates a side view of a prior art heat generating core;

FIG. 3 is a partial enlarged view of portion B of FIG. 2;

fig. 4 is a schematic side view of a heater provided by an embodiment of the present invention;

fig. 5 is a schematic front view of a heater provided by an embodiment of the present invention;

fig. 6 is a schematic front view of the heating core in the embodiment of the present invention;

fig. 7 schematically shows a side view of the heating core in the embodiment of the present invention;

FIG. 8 is an enlarged view of a portion A of FIG. 3;

fig. 9 schematically shows an implementation manner of the heat conducting support and the elastic member in the embodiment of the present invention.

Wherein the correspondence between the reference numbers and the names of the components in fig. 1-9 is:

1. the heat-conducting type heat-conducting tube comprises a shell, 11, a cylindrical cavity, 12, a flange plate, 2, a heat-conducting core body, 21, a shell, 22, a PTC (positive temperature coefficient) heating element, 23, an electrode plate, 24, a first insulating layer, 25, a grounding layer, 26, a second insulating layer, 3, a first heat-conducting support, 4, a second heat-conducting support, 5, an elastic piece, 6, a sealing wire protection tube, 7, a sealing piece, 8, a connecting wire, 9 and a ground wire.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying examples and figures 4-9.

As shown in fig. 4, a side view of a heater according to an embodiment of the present invention is provided.

As shown in the figure, the utility model discloses a heater includes casing, PTC heating core, first heat conduction support and second heat conduction support set up after connecting through the elastic component the inside of casing, and with the inner wall of casing closely laminates, the heating core sets up first heat conduction support with the inside of second heat conduction support.

The first heat conduction support and the second heat conduction support of the heater that this embodiment provided are closely laminated with the internal surface of casing to can adapt to the size change that the expend with heat and contract with cold brought appears in the structure through the elastic component, make and keep closely laminating between heat conduction support and the casing, have the efficient effect of heat conduction. When the installation, with first heat conduction support, second heat conduction support and elastic component connect the back, through first heat conduction support of external force pressfitting and second heat conduction support, make overall structure can put into the casing, after putting into, unload external force, under the effect of elastic component, the support of first heat conduction support and second heat conduction support is pressed at the internal surface of casing, realize closely laminating, when first heat conduction support and second heat conduction support and casing are used for expend with heat and contract with cold's effect to take place size change, the effort of elastic component still can guarantee that first heat conduction support and second heat conduction support are connected with the contact of shells inner wall.

As shown in fig. 5, the casing includes a cylindrical cavity and a flange, one end of the cylindrical cavity is open, the other end is closed, the flange is welded at one end of the opening of the cylindrical cavity, and a plurality of mounting holes for external fixation are formed in the flange.

Preferably, the shell is made of stainless steel with strong corrosion resistance, and scale is not easy to form.

As shown in fig. 6 to 8, the drawings of the heating core provided by the embodiment of the present invention are given. Fig. 3 is a front view of the heating core in the embodiment of the present invention; fig. 4 is a side view of the heating core in the embodiment of the present invention; fig. 5 is a schematic diagram showing a local enlarged internal structure of the heating core in the embodiment of the present invention.

As shown in the figure, the heating core body comprises a shell, a plurality of PTC heating elements arranged in the shell, electrode plates arranged at the upper end and the lower end of each PTC heating element, a first insulating layer and a second insulating layer, wherein the first insulating layer and the second insulating layer are sequentially wrapped on the PTC heating elements and the electrode plates. Therefore, through the two leakage protection measures, the occurrence of human body electric shock and possible accidents such as fire, explosion and the like can be well avoided.

Preferably, a plurality of PTC heating element is in the axial direction of shell arranges the setting in proper order, conveniently generates heat the equipment of core, increases PTC heating element and shell inner wall's area of contact simultaneously to improve heat conduction efficiency.

Preferably, the ground layer is a ground metal sheet disposed between the first insulating layer and the second insulating layer, and the metal sheet is made of conductive metal such as aluminum foil or copper foil having good conductivity. After the metal sheet is connected with the ground wire, the metal sheet is led out from one end of the shell and grounded, so that leakage current is led into the ground, and the electric shock of a human body caused by the leakage current generated by the shell of the heater is avoided.

As shown in fig. 7, an opening is formed at one end of the housing, the opening is an open end, a closed end is formed at the other end of the housing, a sealing member covering the opening is arranged on the open end, so that the PTC heating element, the electrode plate, the first insulating layer, the ground layer and the second insulating layer can be conveniently assembled inside the housing, when the heating core is assembled, the sealing member is taken out first, the PTC heating element, the electrode plate, the first insulating layer, the ground layer and the second insulating layer are assembled outside first, then the whole is placed inside the housing, and finally the sealing member is assembled, wherein the sealing member and the open end are in interference fit. The airtightness of the interior of the heating core body is ensured, and the water seepage in the interior of the heating core body is avoided, so that the electric leakage is avoided.

Preferably, the material of the sealing element is rubber with good elasticity, so that the sealing element is tightly matched with the opening of the shell, and the tightness of the interior of the shell is ensured.

In order to facilitate the connection of the heating core body to an external power supply, a threading hole is formed in the closed end, and a connecting wire of the electrode plate and the metal sheet is led out from the threading hole. Be provided with sealed protective wire pipe in the through wires hole for seal the through wires hole with assembly gap between the connecting wire, sealed protective wire pipe not only can protect connecting wire not by the shell damage can also ensure simultaneously the leakproofness of through wires hole prevents rivers from following the through wires hole permeates the inside of the core that generates heat, leads to the electric leakage that the internal circuit short circuit appears to the danger of the person's electric shock has been avoided.

Preferably, in order to improve the heat conduction efficiency of the heating core and improve the energy utilization rate, the aluminum material with good heat conduction performance is selected for use as the material of the shell.

As shown in fig. 9, an alternative implementation manner of the heat conducting bracket and the elastic member in the embodiment of the present invention is shown.

As shown in the figure, the elastic piece is a slingshot structure, the slingshot structure comprises a first section and a second section which are arranged in parallel, the first section and the second section are both wavy linear elastic bodies, the peak parts of the first section and the second section are abutted on the first heat conduction support, and the valley parts of the first section and the second section are abutted on the second heat conduction support. The linear shape of wave of first section and second section is used for providing elastic deformation after receiving the extrusion, produces elasticity power that resets, and first section and second section parallel arrangement have guaranteed its stability of being connected with a heat conduction support and second heat conduction support, and crest department and trough department and heat conduction support contact, can realize the multiple spot contact, connect more stably.

The utility model also provides an electric protection device of small-size household electrical appliances, the device includes the PTC heater.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A PTC heater, includes casing and the core that generates heat, its characterized in that: the heating core body is arranged inside the shell and comprises a shell, a plurality of PTC heating elements arranged inside the shell, electrode plates arranged at the upper end and the lower end of each PTC heating element, a first insulating layer and a second insulating layer, wherein the first insulating layer and the second insulating layer are sequentially wrapped on the PTC heating elements and the electrode plates, and a grounding layer is arranged between the first insulating layer and the second insulating layer.

2. A PTC heater according to claim 1, wherein: the plurality of PTC heating elements are arranged in sequence in the axial direction of the housing.

3. A PTC heater according to claim 1, wherein: one end of the shell is an open end, the other end of the shell is a closed end, a sealing element covering the open end is arranged on the open end, a threading hole is formed in the closed end, and a connecting lead of the electrode plate and the ground layer is led out from the threading hole.

4. A PTC heater according to claim 1, wherein: the grounding layer is a grounding metal sheet arranged between the first insulating layer and the second insulating layer.

5. A PTC heater according to claim 1, wherein: the shell is made of aluminum materials.

6. A PTC heater according to claim 3, wherein: and a sealing thread protecting pipe is arranged in the thread hole to seal an assembly gap between the thread hole and the connecting wire.

7. A PTC heater according to claim 3, wherein: the sealing element comprises rubber.

8. A PTC heater according to any one of claims 1 to 7, wherein: it still includes first heat conduction support and second heat conduction support, first heat conduction support and second heat conduction support set up after connecting through the elastic component the inside of casing, and with the inner wall of casing closely laminates, the core that generates heat sets up first heat conduction support with the inside of second heat conduction support.

9. A PTC heater according to claim 1, wherein: the shell comprises a cylindrical cavity and a flange plate, one end of the cylindrical cavity is open, the other end of the cylindrical cavity is closed, the flange plate is welded at one end of the opening of the cylindrical cavity, and a plurality of mounting holes for external fixation are formed in the flange plate.

10. An electrical protection device for small appliances, comprising a PTC heater according to any one of claims 1-9.