CN208238246U - PTC electric heating body, thermoelectric heating device and air-heater - Google Patents
PTC electric heating body, thermoelectric heating device and air-heater Download PDFInfo
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- CN208238246U CN208238246U CN201820612202.5U CN201820612202U CN208238246U CN 208238246 U CN208238246 U CN 208238246U CN 201820612202 U CN201820612202 U CN 201820612202U CN 208238246 U CN208238246 U CN 208238246U
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Abstract
The utility model relates to generate heat technique field more particularly to PTC electric heating body, the thermoelectric heating device with the PTC electric heating body using resistance and with the air-heater of the thermoelectric heating device.Wherein, PTC electric heating body is honeycomb ceramics, and honeycomb ceramics has honeycomb hole, and the section of the honeycomb hole of honeycomb ceramics is square, and two adjacent honeycomb holes are same to use an adjacent side.The utility model is able to solve the low density technical problem of PTC electric heating body specific volume power existing in the prior art.
Description
Technical field
The utility model relates to generate heat technique field more particularly to PTC electric heating body using resistance, have the PTC
The thermoelectric heating device of electric heating body and air-heater with the thermoelectric heating device.
Background technique
Electric heater unit is equipped on the small-sized households electric heating products such as warm-air drier, traditional electric heating device includes resistance
Silk, electric heating sheets etc., this kind of electrothermal device itself is without temp regulating function, thus service life is short, high failure rate, safety
Difference.
Another kind is known as the electrothermal device of PTC (Positive Temperature Coefficient, positive temperature coefficient)
Then replace traditional heating device due to it has many advantages, such as high reliablity, easy to use, safe, power saving, is widely used in
The various fields such as electric power facility, electronic equipment and automobile industry.This PTC electrothermal device is a kind of with positive temperature coefficient
Semiconductor function ceramics.Before transition temperature (Tc), resistance declines PTC with the raising of temperature；Temperature from transition temperature to
Before designing maximum temperature, resistance significantly increases with the raising of temperature, forms PTC effect.Using PTC effect, according to difference
Temperature coefficient, the PTC thermal sensitive ceramics of different purposes can be manufactured.The PTC electrothermal device of existing warm-air drier with radiator group
It closes and uses, radiator is used for the heat derives for issuing PTC electrothermal device.
In the prior art, in order to easy to process, ptc material is generally honeycomb ceramics, and the honeycomb hole of honeycomb ceramics is generally circular in cross section,
Using circular honeycomb hole, in the case where guaranteeing minimum wall thickness, specific volume power is lower.
Further, since PTC electrothermal device various pieces will appear the phenomenon that expanding with heat and contract with cold when heated, and unlike material
Coefficient of thermal expansion and contraction is not again identical, so external packing material can be different from the expanded by heating size of ptc material.If after heated
The inside dimension of external material is less than the external dimensions of inner materials, and inner materials or external material can be made by biggish pressure
Power exists and is squeezed broken risk.If the inside dimension of external material is significantly greater than the external dimensions of internal material, meeting after heated
Cause internally positioned PTC honeycomb ceramics to loosen, bonding wire is caused to be damaged.
Utility model content
The purpose of this utility model is to provide thermoelectric heating devices, to solve PTC electric heating body list existing in the prior art
The low technical problem of position volumetric power density.
PTC electric heating body, PTC electric heating body are honeycomb ceramics, and honeycomb ceramics has honeycomb hole, the section of the honeycomb hole of honeycomb ceramics
It is square, two adjacent honeycomb holes are same to use an adjacent side.
By the way that honeycomb ceramics is arranged in PTC electric heating body, the gap that can use the honeycomb hole in honeycomb ceramics enables heat
It is enough to be radiated by way of convection current, heat is taken out of by the outside that fluid flow to PTC electric heating body, be conducive to compared with
Biggish heat dissipation area is generated in small volume, to improve heating power.Especially for this resistivity of PTC electric heating body
It, can be excessively high and lead to resistivity to avoid the temperature of PTC electric heating body by radiating in time for the material that can be varied with temperature
Abruptly increase and limit whole power.
Moreover, the setting of each honeycomb hole is square, the wall thickness at the interval between adjacent honeycomb hole can be made to exist
It is consistent on the direction on certain one side of honeycomb hole, without increasing in the form as circular honeycomb hole Wei minimum wall thickness (MINI W.) is taken into account
The spacing of honeycomb hole, so the setting of square honeycomb hole, can be improved the honeycomb hole number on unit area, and then finally mention
High volumetric power density.Moreover, square is inherently exactly the bigger shape of perimeter area ratio for circle.Institute
In the case where identical honeycomb hole number, identical single honeycomb hole area, so that it may obtain the interior of bigger honeycomb hole
The heat dissipation area of wall area summation, i.e. honeycomb ceramics when honeycomb hole passes through fluid also increases, i.e., overall heat-exchange capacity mentions
Height, so can also be correspondingly improved the thermal power of heat dissipation in the case where identical total sectional area.Finally also further increase
Volumetric power density.
Preferred technical solution, supplementary features are that honeycomb ceramics is cylindrical body, the length direction and cylindrical body of honeycomb hole
Short transverse it is identical.
It is identical as the direction of cylindrical body by being arranged in the direction of honeycomb hole, it can be by PTC electric heating body and air-flow side
To setting in the same direction, can pass through when air-flow passes through from honeycomb hole to take the heat in PTC electric heating body out of.Guarantee realizing
In the case that the temperature of PTC heater is not excessively high, the patency of air-flow flowing can also be improved.So the thermoelectric heating device, special
It Shi Yongyu not the equipment such as warm-air drier, hair dryer, dryer.
Preferred technical solution, supplementary features are that the unilateral length of the square of honeycomb hole is 0.95mm-
1.05mm, wall thickness is 0.24-0.32mm between two adjacent holes.
After using above-mentioned size, 877 honeycomb holes can be set on the honeycomb ceramics of 40.5mm diameter, put down
Every square centimeter that 69 honeycomb holes can be set, specific surface area can achieve 30.9cm-1。
Another of the utility model is designed to provide a kind of thermoelectric heating device, is provided with any of the above-described PTC electricity fever
Body.
The thermoelectric heating device has all technical effects of the PTC electric heating body in above scheme.
Preferred technical solution, supplementary features are, further include shell and electrode slice, are arranged between electrode slice and shell
Flexible component, electrode slice contact simultaneously with elastomeric element and PTC electric heating body, and elastomeric element connects simultaneously with electrode slice and shell
Touching.
The thermoelectric heating device, by the way that elastomeric element is arranged between electrode slice and shell, using the elasticity of elastomeric element,
When PTC electric heating body temperature is higher, amount of elastic deformation is slightly larger, and elastomeric element resists electrode slice, enables electrode slice in temperature
It is kept in contact, and is unlikely to by very big squeezing action power with PTC heater when higher.When PTC electric heating body temperature is lower
When, amount of elastic deformation is slightly smaller, and elastomeric element can also resist electrode slice, so that electrode slice is kept in contact with PTC electric heating body, no
As for because the two, which is detached from, causes discharge spark.To improve the service life of thermoelectric heating device.
Further preferred technical solution, supplementary features are that the end face of shell is equipped with multiple ventholes, venthole
Section cover the sections of multiple honeycomb holes.
By the way that venthole is arranged on the end face of shell, the air being externally entering can use, especially quickly flowing
Air-flow, PTC electric heating body is cooled down, to control the temperature of PTC electric heating body, can to operate in resistivity normal
Section, and at the same time realizing heating to air-flow.
Technical solution still further preferably, supplementary features are that elastomeric element is resilient metal strip, each item elasticity gold
Belong to adjacent side setting of the item along the square of part.
Adjacent side by resilient metal strip along adjacent square is arranged, i.e., the direction along the side of square is arranged, it is possible to reduce
Resilient metal strip is for the obstruction that will be run by the air-flow of honeycomb hole and the air-flow flowed out from honeycomb hole, to reduce wind speed
Loss.
Technical solution still more preferably, supplementary features are, shell setting is fluted, metal strip it is a part of embedding
Enter in groove.
By the way that a part of metal strip to be embedded into groove, the stability of metal strip can be improved, incited somebody to action to will improve
The fixed stability of electrode slice, to guarantee that electrode slice and PTC electric heating body will not virtual connections.
Another of the utility model is designed to provide a kind of air-heater, is provided with any of the above-described thermoelectric heating device.
The air-heater has all technical effects of the thermoelectric heating device in above scheme.
Preferred technical solution, supplementary features are that air-heater is hair dryer, Household hot blower, hand dryer, tableware baking
Dry equipment, tea leaf drier or dryer.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the main view of the PTC electric heating body of embodiment one；
Fig. 2 is the cross-sectional view of the thermoelectric heating device of embodiment two；
Fig. 3 is the front view of the thermoelectric heating device of embodiment two；
Fig. 4 is the rearview of the shell in embodiment two.
Icon: 1- shell；11- groove；12-ventholes；2- electrode slice；3-PTC electric heating body；31- honeycomb hole；4- bullet
Property metal strip.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
Embodiment one
As shown in Figure 1, PTC electric heating body 3 is honeycomb ceramics, honeycomb ceramics has honeycomb hole 31, the honeycomb hole 31 of honeycomb ceramics
Section is square, the same adjacent side of two adjacent honeycomb holes 31.Other than being located at the honeycomb hole 31 of honeycomb edges, often
Around a honeycomb hole 31 be distributed eight with etc. big honeycomb hole 31.In the present embodiment, since honeycomb body thickness is less than honeycomb
The diameter of body, so honeycomb ceramics is it is also assumed that be patty.The corresponding proportion of specific thickness and diameter, those skilled in the art
Member can set according to the needs of heating power and the big freedom in minor affairs in space.
By the way that honeycomb ceramics is arranged in PTC electric heating body 3, the gap that can use the honeycomb hole 31 in honeycomb ceramics makes heat
It can be radiated by way of convection current, heat is taken out of by the outside that fluid flow to PTC electric heating body 3, is conducive to
Biggish heat dissipation area is generated in lesser volume, to improve heating power.It is this especially for PTC electric heating body 3
It, can be excessively high and lead to avoid the temperature of PTC electric heating body 3 by radiating in time for the material that resistivity can vary with temperature
It causes resistivity abruptly increase and limits whole power.
Moreover, the setting of each honeycomb hole 31 is square, the wall at the interval between adjacent honeycomb hole 31 can be made
Thickness is consistent on the direction on certain one side of honeycomb hole 31, without taking minimal wall into account in the form as circular honeycomb hole 31
Spacing that is thick and increasing honeycomb hole 31, so the setting of square honeycomb hole 31, can be improved the honeycomb hole 31 on unit area
Quantity, and then finally improve volumetric power density.Moreover, square is inherently exactly perimeter area for circle
Than bigger shape.So in the case where identical 31 quantity of honeycomb hole, identical single 31 area of honeycomb hole, so that it may obtain
The inner wall area summation of bigger honeycomb hole 31 is obtained, i.e. heat dissipation area of the honeycomb ceramics when honeycomb hole 31 passes through fluid also increases
, i.e., overall heat-exchange capacity improves, so can also be correspondingly improved heat dissipation in the case where identical total sectional area
Thermal power.Finally also further improve volumetric power density.
Particularly, honeycomb ceramics is cylindrical body, and the length direction of honeycomb hole 31 and the short transverse of cylindrical body are identical.
It is identical as the direction of cylindrical body by being arranged in the direction of honeycomb hole 31, it can be by PTC electric heating body 3 and air-flow
Direction is arranged in the same direction, can pass through when air-flow passes through from honeycomb hole 31 to take the heat in PTC electric heating body 3 out of.In reality
In the case where now guaranteeing that the temperature of PTC heater is not excessively high, the patency of air-flow flowing can also be improved.So the electricity generates heat
Device, especially suitable for equipment such as warm-air drier, hair dryer, dryers.
Particularly, the unilateral length of the square of honeycomb hole 31 is 1.02mm, and wall thickness is between two adjacent holes
0.28mm。
After using above-mentioned size, 877 honeycomb holes 31 can be set on the honeycomb ceramics of 40.5mm diameter,
69 honeycomb holes 31 can be set in per square centimeter on average, and specific surface area can achieve 30.9cm-1.It should be noted that here
Specific surface area refer in honeycomb ceramics in addition to two end faces remaining each outer surface and honeycomb hole 31 inner wall surface
The sum of product.Because the height of cylindrical honeycomb ceramics increases, i.e., the thickness of above-mentioned patty increases, the volume of honeycomb ceramics and
The area summation of the inner wall of honeycomb hole 31, can all increase in proportion, so the height change of honeycomb ceramics, will not influence specific surface area
Variation.
It should be noted that Fig. 1 is only schematical, the honeycomb ceramics of PTC electric heating body 3 is only schematically indicated
On end face, the shape of each honeycomb hole 31 and rough arrangement pattern do not represent real, specific bee on honeycomb ceramics
The setting of socket bore 31.Naturally, considering view clearly factor, a honeycomb hole 31 more than above-mentioned 800 is not drawn in figure, is schemed
In hole quantity, it is only for reference.
Embodiment two
As shown in figs 2-4, the present embodiment provides a kind of thermoelectric heating devices, are provided with the PTC electric heating body 3 of embodiment one.
So closing the description of PTC electric heating body 3 in this present embodiment, it may refer to the corresponding contents of embodiment one.
The thermoelectric heating device has all technical effects of the PTC electric heating body 3 in above scheme.
Particularly, further include shell 1 and electrode slice 2, elastomeric element, electrode slice are provided between electrode slice 2 and shell 1
2 contact simultaneously with elastomeric element and PTC electric heating body 3, and elastomeric element contacts simultaneously with electrode slice 2 and shell 1.
The thermoelectric heating device, by the way that elastomeric element is arranged between electrode slice 2 and shell 1, using the elasticity of elastomeric element,
When 3 temperature of PTC electric heating body is higher, amount of elastic deformation is slightly larger, and elastomeric element resists electrode slice 2, enables electrode slice 2 in temperature
It is kept in contact, and is unlikely to by very big squeezing action power with PTC heater when spending higher.When 3 temperature of PTC electric heating body compared with
When low, amount of elastic deformation is slightly smaller, and elastomeric element can also resist electrode slice 2, so that the holding of electrode slice 2 and PTC electric heating body 3 connects
Touching is unlikely to because the two, which is detached from, causes discharge spark.To improve the service life of thermoelectric heating device.
Further particularly, the end face of shell 1 is equipped with multiple ventholes 12, and the section of venthole 12 covers multiple bees
The section of socket bore 31.That is, one side of the square of a venthole 12, is, ventilation parallel with the corresponding side of honeycomb hole 31
The one side in hole 12 is parallel with a line honeycomb hole 31 being distributed along a direction.Correspondingly, the length of a line, it may be for along one
The sum of integral multiple and the integral multiple of wall thickness of the side length in the adjacent cell hole 31 of row distribution.
By the way that venthole 12 is arranged on the end face of shell 1, it can use the air being externally entering, especially quickly flow
Dynamic air-flow cools down PTC electric heating body 3, can operate in resistivity to control the temperature of PTC electric heating body 3
Normal section, and at the same time realizing the heating to air-flow.
Further particularly, elastomeric element is resilient metal strip 4, square of each resilient metal strip 4 along part
Adjacent side setting.
Adjacent side by resilient metal strip 4 along adjacent square is arranged, i.e., the direction along the side of square is arranged, it is possible to reduce
Resilient metal strip 4 is for the obstruction that will be run by the air-flow of honeycomb hole 31 and the air-flow flowed out from honeycomb hole 31, to reduce
The loss of wind speed.
Further particularly, shell 1 is arranged fluted 11, and a part of metal strip is embedded in groove 11.Specifically,
When in the present embodiment, due to resilient metal strip 4 and pass through 1 surface of shell hollow parts, when and pass through adjacent venthole
The solid section of 12 shared adjacent side, thus be to the fixation of a certain resilient metal strip 4 it is intermittent, even intermittent,
Since resilient metal strip 4 is wavy, so also there is enough overlapping areas so that resilient metal strip 4 can be stuck in it is recessed
In slot 11.
By the way that a part of metal strip to be embedded into groove 11, the stability of metal strip can be improved, to will improve
By the stability that electrode slice 2 is fixed, to guarantee that electrode slice 2 and PTC electric heating body 3 will not virtual connections.
Embodiment three
The present embodiment provides air-heaters, are provided with any of the above-described thermoelectric heating device.
The air-heater has all technical effects of the thermoelectric heating device in above scheme.Specifically, the heat in the present embodiment
Blower, can be that hair dryer, Household hot blower, hand dryer, tableware drying equipment, tea leaf drier, dryer etc. are a variety of to be set
It is standby.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced, such as:
(1) in embodiment two, elastomeric element observed on its side view be it is wavy, can also actually select it
The elastomeric element of his form, such as a metal spring leaf, can also play the similar effect of the elastomeric element in embodiment one.
It (2) is that the unilateral length of the square of honeycomb hole is selected as to 0.95mm-1.05mm in embodiment one, adjacent two
Wall thickness is selected as 0.24mm-0.32mm between a hole.Actually it is also an option that the unilateral length or wall thickness of other honeycomb holes.
(3) in embodiment one, the selection of the shape of venthole is square, the center of each venthole be actually also according to
Square profile, it can also actually change the shape of venthole, can such as be changed to circle, the center of each venthole,
Still it is distributed according to square.Good ventilation effect can also be obtained, while also can satisfy elastic sheet metal in groove
In fixed need.
(4) in the attached drawing of embodiment two, square venthole is alternatively distributed, the distribution side in each column in figure
Formula is the end face in order to more effectively utilize shell, to form ventholes more as far as possible, with biggish breathing area.It is practical
On, venthole can also be distributed at matrix, in this way, resilient metal strip can it is continuous it is embedding in a groove, elastic metallic
The fixed effect of item may be more preferable.
And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1.PTC electric heating body, which is characterized in that the PTC electric heating body is honeycomb ceramics, and the honeycomb ceramics has honeycomb hole, institute
The section for stating the honeycomb hole of honeycomb ceramics is square, and two adjacent honeycomb holes are same to use an adjacent side.
2. PTC electric heating body according to claim 1, which is characterized in that the honeycomb ceramics is cylindrical body, the honeycomb hole
Length direction it is identical as the short transverse of the cylindrical body.
3. PTC electric heating body according to claim 1 or 2, which is characterized in that the unilateral length of the square of the honeycomb hole
Degree is 0.95mm-1.05mm, and wall thickness is 0.24-0.32mm between two adjacent holes.
4. thermoelectric heating device, which is characterized in that be provided with the PTC electric heating body of claims 1 or 2 or 3.
5. thermoelectric heating device according to claim 4, which is characterized in that further include shell and electrode slice, the electrode slice and
Elastomeric element is provided between the shell, the electrode slice contacts simultaneously with the elastomeric element and the PTC electric heating body,
The elastomeric element contacts simultaneously with electrode slice and the shell.
6. thermoelectric heating device according to claim 5, which is characterized in that the end face of the shell is equipped with multiple ventholes,
The section of the venthole covers the section of multiple honeycomb holes.
7. thermoelectric heating device according to claim 6, which is characterized in that the elastomeric element is resilient metal strip, each item institute
The adjacent side that resilient metal strip is stated along the square of part is arranged.
8. thermoelectric heating device according to claim 7, which is characterized in that the shell setting is fluted, the metal strip
It is partially submerged into the groove.
9. air-heater, which is characterized in that be provided with the thermoelectric heating device of any one of claim 1-8.
10. air-heater according to claim 9, which is characterized in that the air-heater is hair dryer, Household hot blower, does
Mobile phone, tableware drying equipment, tea leaf drier or dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612202.5U CN208238246U (en) | 2018-04-26 | 2018-04-26 | PTC electric heating body, thermoelectric heating device and air-heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612202.5U CN208238246U (en) | 2018-04-26 | 2018-04-26 | PTC electric heating body, thermoelectric heating device and air-heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208238246U true CN208238246U (en) | 2018-12-14 |
Family
ID=64584435
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820612202.5U Expired - Fee Related CN208238246U (en) | 2018-04-26 | 2018-04-26 | PTC electric heating body, thermoelectric heating device and air-heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2021176927A1 (en) * | 2020-03-05 | 2021-09-10 |
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2018
- 2018-04-26 CN CN201820612202.5U patent/CN208238246U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2021176927A1 (en) * | 2020-03-05 | 2021-09-10 | ||
| WO2021176927A1 (en) * | 2020-03-05 | 2021-09-10 | 日本碍子株式会社 | Electrically heated converter and production method for electrically heated converter |
| JP7445742B2 (en) | 2020-03-05 | 2024-03-07 | 日本碍子株式会社 | Electrically heated converter and method for manufacturing the electrically heated converter |
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Granted publication date: 20181214 Termination date: 20190426 |