CN2349737Y

CN2349737Y - Fully closed adhesive type PTC heating device without electricity on surface

Info

Publication number: CN2349737Y
Application number: CN 98244023
Authority: CN
Inventors: 黄花; 谭北滨; 张大牛
Original assignee: Jinke Special Material Co ltd
Current assignee: Shenzhen Jinke Special Materials Co., Ltd.
Priority date: 1998-09-10
Filing date: 1998-09-10
Publication date: 1999-11-17
Anticipated expiration: 2008-09-10

Abstract

The utility model relates to a fully closed adhesive type PTC heating device without electricity on surfaces, which comprises a PTC ceramic heating plate, an electrode, an insulating material and a metal flat pipe. The PTC ceramic heating plate and the electrode are arranged in the metal flat pipe in a seal way; the insulating material is arranged between the electrode and the metal flat pipe to make the electrode and the metal flat pipe are separated; one layer of heat conductive adhesive is stuck between the PTC ceramic heating plate and the electrode; the outer surface of the metal flat pipe is connected with a corrugated heat dissipation stripe by the heat conductive adhesive. The utility model avoids the exposure of the electrode and the outer surface of the device does not leak electricity; thus, the utility model is safe and convenient; an adhesive type is adopted to make heat can be conducted directly, heat dissipation effect is good, heat efficiency is high, structure is compact, contact sealing is reliable, and power attenuation caused by loose contact which is caused by heat expansion and cold contraction can be avoided.

Description

The not charged PTC heater spare in totally-enclosed adhesive type surface

The utility model belongs to PTC heater spare field.

Existing P TC heater members mainly contains two kinds of forms, a kind of is the surface charging type, and a kind of is not charged type of surface, and two kinds of forms respectively have pluses and minuses.The surface charging type be that heat sink strip directly is bonded on the PTC heating sheet with heat-conducting glue, the direct anode and cathode terminals of extraction electrode from the heat sink strip again.The advantage of this PTC heater spare is simple and compact for structure, and volume is little, conducts heat directly, and thermal conversion efficiency is higher, and the heating power of unit volume device is bigger.Its major defect is the entire device surface charging; there is certain potential safety hazard in the use; and electrode directly is exposed in the air; might lose efficacy because of environmental factors such as humidity or dust cause sparking; therefore a lot of in the use restriction of this device, the design at aspects such as installing space and safeguard protections all have comparatively complicated requirement.Existing surface is the PTC heater spare of charged type not, as Chinese utility model patent 93216676.8, be that PTC heating sheet and electrode slice are encapsulated in the aluminum pipe, between electrode slice and the aluminum pipe every with one deck insulating material, outer wall at aluminum pipe is inserted with fin, and aluminum pipe is sealed at both ends.The advantage of this PTC heater spare is that structure is totally-enclosed, has moistureproof dustproof effect; The surface is not charged, has improved fail safe.But its shortcoming is: because PTC heating sheet weak heat-dissipating under air-tight state, overheated because of the heat accumulation generation easily, because of thermal breakdown was lost efficacy, therefore between PTC heating sheet at interval athermic ceramic partition, reduced the heating power on the unit length with regard to corresponding like this; Its heat transfer type has constituted too many heat transfer level fully by the nature transmission of heat by contact between heating sheet, electrode, insulating material and aluminum pipe in addition, and the air gap that all may exist between each level greatly reduces conducts heat and radiating effect; In addition between each level through after expanding with heat and contract with cold repeatedly, closeness of contact is descended, cause the power attenuation rate of this device bigger.

The purpose of this utility model is at the above problem, and a kind of not only safety but also PTC heater spare efficiently are provided.

The purpose of this utility model is achieved in that the utility model comprises PTC ceramic heating plate, electrode, insulating material and flat metal tube, PTC ceramic heating plate and electrode package are in flat metal tube, between electrode and flat metal tube every with insulating material, between PTC ceramic heating plate and electrode, be stained with one deck heat-conducting glue, be bonded with corrugated heat sink strip with heat-conducting glue at the outer surface of flat metal tube.

Technique effect of the present utility model is: the utility model combines the advantage of two kinds of existing P TC heater members, overcome the shortcoming of the two, it adopts the existing not totally-enclosed form of charged type on overall structure, sealing structure, avoided electrodes exposed in air, and the outer surface of device is not charged, safe ready in the use; It adopts gluing form on the internal heat transfer mode, it is more direct to conduct heat, and radiating effect is better, can avoid thermal breakdown, and the heating efficiency height, does not therefore need ceramic partition; More compact structure contacts tightr reliably, has avoided making because of expanding with heat and contract with cold contacting the loose power attenuation that causes.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the monnolithic case figure of the utility model embodiment.

Fig. 2 is the A-A profile of Fig. 1.

Fig. 3 is the partial enlarged drawing of Fig. 2.

As Fig. 1, Fig. 2 and shown in Figure 3, the utility model embodiment comprises heating inner container, heating inner container forms by all being coated with between compact arranged row's PTC ceramic heating plates 5 and the two-layer up and down electrode slice 7 with one deck heat-conducting glue 2 back tight bond, and this gluing form has been eliminated that the contact that causes because of the difference on each sheet PTC ceramic heating plate gauge is bad, heat conduction efficiency is low and lost efficacy because of existing the air gap to produce the thermal breakdown that heat accumulation causes.Putting into aluminium flat conduit 3 behind the good insulating material 6 of the ultra-thin thermal conductivity of coated outside one deck lightweight of aforementioned heating inner container compresses.Use high-quality heat-conducting glue 2 bonding two corrugated heat sink strips 1 again at the outer surface up and down of aforementioned aluminium flat conduit 3, this gluing form is more direct more reliable more lasting than the heat-transfer effect that fin wears aluminum pipe.Be plugged with the plastics chock plug of heatproof at the two ends of aluminium flat conduit 3, and be coated with fluid sealant, play the binding post 4 and the sealed aluminum flat tube 3 of fixed electrode 7 at the chock plug place.

Aluminium flat conduit 3 in the foregoing description can adopt other flat metal tube.

Claims

1. not charged PTC heater spare in totally-enclosed adhesive type surface, comprise PTC ceramic heating plate (5), electrode (7), insulating material (6) and flat metal tube (3), PTC ceramic heating plate (5) and electrode (7) are encapsulated in the flat metal tube (3), between electrode (7) and flat metal tube (3),, it is characterized in that: between PTC ceramic heating plate (5) and electrode (7), be stained with one deck heat-conducting glue (2) every with insulating material (6); Outer surface at flat metal tube (3) is bonded with corrugated heat sink strip (1) with heat-conducting glue (2).