CN218788848U

CN218788848U - Heating element and PTC heater

Info

Publication number: CN218788848U
Application number: CN202223045394.1U
Authority: CN
Inventors: 康海标; 唐骐亮
Original assignee: Jiangsu Huitian Electromechanical Technology Co ltd
Current assignee: Jiangsu Huitian Electromechanical Technology Co ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-04-04
Anticipated expiration: 2032-11-16

Abstract

The utility model discloses a heating element, be in including protective housing and setting heating core in the protective housing, the protective housing has two parallel plane boards, the upper surface and the lower surface of heating core respectively with two plane boards of protective housing are laminated mutually. The utility model also discloses a PTC heater. The utility model discloses because heating element has the protective housing, when consequently compressing tightly fixed heating member, the protective housing can protect the heating core to a certain extent, because of too big PTC potsherd breakage of messenger of pressure when having avoided compressing tightly fixed heating member, and then influences the heating effect of heating member or makes the heating member lose heating capacity.

Description

Heating element and PTC heater

Technical Field

The utility model relates to a liquid heating field, concretely relates to heating element and PTC heater.

Background

At present, most of liquid heaters on the market adopt electric heating pipes, the electric heating pipes are easy to condense water scales, so that pipe explosion and electric leakage are caused, and meanwhile, once the electric heating pipes are lack of water and are dried, fire disasters are easily caused.

In recent years, heating cores made of PTC ceramic materials have been used gradually, with low surface temperatures, avoiding to a certain extent the hidden danger of open flames.

In the prior art, the PTC heater needs to be arranged in the shell body of the heating core in the manufacturing process and then is pressed and fixed, and the PTC ceramic is easy to crush in the die-casting process due to the fragile PTC ceramic, so that the heating effect of the PTC heater is poor or the heating effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one technical problem of the prior art, the utility model provides a heating element and a PTC heater.

In order to achieve the purpose of the utility model, the utility model adopts the technical proposal that: the heating element comprises a protective shell and a heating core arranged in the protective shell, wherein the protective shell is provided with two parallel plane plates, and the upper surface and the lower surface of the heating core are respectively attached to the two plane plates of the protective shell.

Further, the heating core comprises an upper electrode plate, a lower electrode plate, a plurality of PTC ceramic plates arranged between the upper electrode plate and the lower electrode plate along the length direction, and insulating adhesive tapes wrapping the peripheries of the upper electrode plate, the lower electrode plate and the PTC ceramic plates.

Furthermore, at least one end of the heating core is connected with a wiring terminal.

Further, the PTC ceramic sheet is connected with the upper electrode sheet and the lower electrode sheet through high-temperature silica gel.

Further, the protective housing is made of aluminum.

A PTC heater comprising:

a first end cap having a liquid inlet;

a second end cap having a liquid outlet;

the heating body is connected between the first end cover and the second end cover and comprises a shell and the heating element, the shell is provided with at least one fluid channel and at least one heating channel, two ends of the fluid channel are respectively communicated with the liquid inlet and the liquid outlet, and the heating element is arranged in the heating channel

Further, the first end cover is also provided with at least one first groove which is not communicated with the liquid inlet; the second end cover is also provided with at least one second groove which is not communicated with the liquid outlet; and two ends of the heating channel are respectively communicated with the first groove and the second groove.

Further, the first end cover is also provided with at least one first liquid channel communicated with the liquid inlet; the second end cover is also provided with at least one second liquid channel communicated with the liquid outlet; both ends of the fluid passage are respectively communicated with the first fluid passage and the second fluid passage.

Further, sealing members are respectively provided between an end face of the first liquid passage and an end face of the fluid passage, and between an end face of the second liquid passage and an end face of the fluid passage.

Further, the liquid inlet, the first liquid channel, the fluid channel, the second liquid channel and the liquid outlet are communicated in sequence to form a circulation channel for one-way circulation of liquid.

The beneficial effects of the utility model reside in that:

1. the heating element is provided with the protective shell, so that the protective shell can protect the heating core to a certain extent when the heating body is tightly pressed and fixed, and the phenomenon that the PTC ceramic plate is broken due to overlarge pressure when the heating body is tightly pressed and fixed is avoided, so that the heating effect of the heating body is influenced or the heating capacity of the heating body is lost;

2. the circulation channel of the PTC heater is set to be in one-way circulation, so that the heat on the surface of the heating body 3 can be better taken away, and the heat exchange between the heating body 3 and liquid is better utilized, thereby improving the heating efficiency of the PTC heater.

Drawings

Fig. 1 is a schematic structural diagram of a heating element according to the present invention;

fig. 2 is a schematic structural diagram of a PTC heater according to the present invention;

fig. 3 is a sectional view of a PTC heater according to the present invention.

Description of the symbols:

the liquid heating device comprises a first end cover 1, a first cover body 11, a liquid inlet 110, a first liquid channel 111, a first groove 112, a base 12, a second end cover 2, a second cover body 21, a liquid outlet 210, a second liquid channel 211, a second groove 212, a connecting seat 22, a heating body 3, a heating element 30, a protective shell 30a, a heating core 30b, a PTC ceramic piece 301, an upper electrode piece 302, a lower electrode piece 303, insulating gummed paper 304, a wiring terminal 305, a shell 31, a circulation channel 310 and a heating channel 311.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understandable, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description, wherein the drawings are simplified schematic drawings, and only the basic structure of the present invention is schematically illustrated, so that only the components related to the present invention are shown, and it is to be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other variations and in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Referring to fig. 1, there is provided a heating element 30, which includes a protective shell 30a and a heating core 30b disposed in the protective shell 30a, wherein the protective shell 30a has two plane plates disposed in parallel, and an upper surface and a lower surface of the heating core 30b are respectively closely attached to the two plane plates of the protective shell 30a, so that the temperature of the heating core 30b can be rapidly transferred to the protective shell 30a due to the upper and lower surfaces of the heating core 30b being closely attached to the plane plates of the protective shell 30a, and the two plane plates of the protective shell 30a are closely attached to the upper and lower surfaces of the heating core 30b, so that the contact area between the protective shell 30a and the heating core 30b is increased, and when the heating element 30 is compressed, the protective shell 30a can maximally bear and relieve the force received by the heating core 30b, thereby protecting the heating core 30b. Preferably, the upper and lower panels of the protective case 30a are flat panels.

The heater core 30b is strip-shaped, and includes an upper electrode sheet 302, a lower electrode sheet 303, a plurality of PTC ceramic sheets 301 arranged between the upper electrode sheet 302 and the lower electrode sheet 303 along the length direction, and an insulating adhesive tape 304 wrapped around the upper electrode sheet 302, the lower electrode sheet 303, and the PTC ceramic sheets 301, wherein the PTC ceramic sheets 301 are connected with the lower electrode sheet 303 through the upper electrode sheet 302 and the lower electrode sheet 303 of high-temperature silica gel.

At least one end of the heater core 30b is connected to a connection terminal 305, and is connected to a power source through the connection terminal 305.

The heating element 30 is formed substantially as follows: the assembled heating core 30b is placed in the cavity of the protective shell 30a, and then pressure is applied to the protective shell 30a to bring the upper and lower panels of the protective shell 30a into close contact with the upper and lower surfaces of the heating core 30b.

The protective shell 30a is made of aluminum, which has excellent heat conductivity and is easily deformed under pressure, so that the heating element 30 can be conveniently manufactured and molded.

Referring to fig. 2 and 3, the present invention further provides a PTC heater, which comprises a first end cap 1, a second end cap 2 and a heating body 3 connected between the first end cap 1 and the second end cap 2, wherein the heating body 3 comprises a housing 31 and the heating element 30 disposed in the housing 31, the first end cap 1 has an inlet 110, the second end cap 2 has an outlet 210, the housing 31 has at least one circulation channel 310 and at least one heating channel 311, two ends of the circulation channel 310 are respectively communicated with the inlet 110 and the outlet 210, and the heating element 30 is disposed in the heating channel 311.

The first end cap 1 includes a first cap body 11 and a base 12 detachably connected, the base 12 has a first sinking groove, a lower end of the first cap body 11 is disposed in the first sinking groove, and a sealing element is disposed between the first cap body 11 and the first sinking groove. The lower end of the first cover body 11 is provided with a connecting table which is fixedly connected with the base 12 through screws.

The first cover 11 is provided with the loading port 110, the first cover 11 is further provided with at least one first liquid channel 111 communicated with the loading port 110 and at least one first groove 112 not communicated with the loading port 110, the first liquid channel 111 is communicated with the circulation channel 310 and is located between the loading port 110 and the circulation channel 310, and the first groove 112 is communicated with the circulation channel 310.

The second end cap 2 includes a second cap 21 and a connecting seat 22 that are detachably connected, and the connection manner between the second cap 21 and the connecting seat 22 is the same as that between the first cap 11 and the base 12, and will not be described in detail here. The second cover 21 is provided with the liquid outlet 210, at least one second liquid passage 211 communicated with the liquid outlet 210, and at least one second groove 212 not communicated with the liquid outlet 210, wherein the second liquid passage 211 is communicated with the flow passage 310 and is located between the liquid outlet 210 and the flow passage 310. The liquid inlet 110, the first liquid channel 111, the flow channel 310, the second liquid channel 211 and the liquid outlet 210 are sequentially communicated to form a flow channel for one-way flow of liquid, the liquid flows into the PTC heater at the liquid inlet 110, then sequentially flows through the first liquid channel 111 and the flow channel 310, and after being heated at the flow channel 310, flows through the second liquid channel 211 and finally flows out of the PTC heater from the liquid outlet 210. The circulation channel of the PTC heater is set to be in one-way circulation, so that the heat on the surface of the heating body 3 can be better taken away, and the heat exchange between the heating body 3 and liquid is better utilized, thereby improving the heating efficiency of the PTC heater. The second groove 212 communicates with the flow channel 310.

The first cover 11 and the second cover 21 are fixedly connected to the housing 31 by screws, and in order to prevent liquid from penetrating into the heating passage 311 from between the end surface of the first liquid passage 111 and the end surface of the fluid passage 310 and/or between the end surface of the second liquid passage 211 and the end surface of the fluid passage 210, seal members are provided between the end surface of the first liquid passage 111 and the end surface of the fluid passage 310 and between the end surface of the second liquid passage 211 and the end surface of the fluid passage 210, respectively.

The sealing element can be a sealing gasket or a sealant and the like.

As a preferred embodiment, the first end cap 1 is provided with 3 first

liquid channels

111 and 2 first grooves 112, the first liquid channels 111 are arranged at intervals from the first grooves 112, and the first liquid channels 111 are located outside the first liquid channels 111; the second end cap 2 and the housing 31 are provided corresponding to the first end cap 1.

The manufacturing process of the PTC heater is substantially as follows: the housing 31 is formed by casting, punching, or the like, then the heating element 30 is placed in the heating passage 311 of the housing 31 and is press-fixed to form the heating body 3, and finally the heating body 3 is connected to the first and

second end caps

1 and 2, respectively.

Since the heating element 30 has the protective case 30a, the protective case 30a can protect the heating core 30b to some extent during the molding of the heating body 3, preventing the PTC ceramic sheets from being broken due to excessive pressure.

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 the above-described 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 invention. 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 heating element is characterized by comprising a protective shell and a heating core arranged in the protective shell, wherein the protective shell is provided with two parallel plane plates, and the upper surface and the lower surface of the heating core are respectively attached to the two plane plates of the protective shell.

2. Heating element according to claim 1,

the heating core comprises an upper electrode plate, a lower electrode plate, a plurality of PTC ceramic plates arranged between the upper electrode plate and the lower electrode plate along the length direction, and insulating gummed paper wrapping the peripheries of the upper electrode plate, the lower electrode plate and the PTC ceramic plates.

3. Heating element according to claim 2,

the heating core has at least one end connected with a wiring terminal.

4. Heating element according to claim 2,

the PTC ceramic sheet is connected with the upper electrode sheet and the lower electrode sheet through high-temperature silica gel.

5. Heating element according to claim 1,

the protective housing is made of aluminum.

6. A PTC heater, comprising:

a first end cap having a liquid inlet;

a second end cap having a liquid outlet;

a heating body connected between the first end cap and the second end cap, comprising a housing and the heating element of any one of claims 1 to 5, the housing having at least one fluid channel and at least one heating channel, both ends of the fluid channel respectively communicating with the liquid inlet and the liquid outlet, the heating element being disposed in the heating channel.

7. The PTC heater according to claim 6,

the first end cover is also provided with at least one first groove which is not communicated with the liquid inlet;

the second end cover is also provided with at least one second groove which is not communicated with the liquid outlet;

and two ends of the heating channel are respectively communicated with the first groove and the second groove.

8. The PTC heater according to claim 6,

the first end cap is also provided with at least one first liquid channel communicated with the liquid inlet;

the second end cover is also provided with at least one second liquid channel communicated with the liquid outlet;

both ends of the fluid passage are respectively communicated with the first fluid passage and the second fluid passage.

9. The PTC heater according to claim 8,

sealing elements are respectively arranged between the end face of the first liquid channel and the end face of the fluid channel and between the end face of the second liquid channel and the end face of the fluid channel.

10. The PTC heater according to claim 8,

the liquid inlet, the first liquid channel, the fluid channel, the second liquid channel and the liquid outlet are communicated in sequence to form a circulation channel for unidirectional liquid circulation.