CN219687021U - Control box of PTC heater and PTC heater - Google Patents

Abstract

The utility model relates to a control box of a PTC heater and the PTC heater; the control box comprises a bottom shell and an upper cover, wherein the bottom shell and the upper cover are detachably connected, the upper cover and the bottom shell enclose to form a containing cavity and a wiring cavity, a first partition plate is arranged between the containing cavity and the wiring cavity, a control board is arranged in the containing cavity, two copper nuts are arranged in the wiring cavity and are respectively connected with an anode binding post and a cathode binding post, the anode binding post and the cathode binding post are both connected with the control board, and screws for fixing the wiring ends of the low-voltage wiring harness are arranged on the copper nuts. The control box is internally provided with the accommodating cavity and the wiring cavity, the accommodating cavity and the wiring cavity are separated by the first partition plate to form two separation areas, the wiring cavity is connected with the low-voltage wire harness, the influence on a control board can be reduced, the wiring cavity is internally provided with the copper nut, the influence on a terminal of the low-voltage wire harness can be reduced when the screw is screwed down to fix the low-voltage wire harness, the deformation of the terminal under the action of torque is avoided, and the control box is not easy to damage.

Description

Control box of PTC heater and PTC heater

Technical Field

The utility model relates to the technical field of automobile air conditioners, in particular to a control box of a PTC heater and the PTC heater.

Background

New energy automobiles are listed in the development planning of national strategic industries, and the replacement of traditional fuel automobiles is a trend. Different from the traditional fuel oil vehicle, the battery plate heating and the air conditioning and heating system of the new energy vehicle all need independent heaters, and the PTC is taken as a positive temperature coefficient semiconductor material, thus being an ideal material for an automobile heating device.

The patent CN115278954a discloses a PTC heater, the control box is connected with a low-voltage wire harness, the low-voltage wire harness comprises a first terminal and a second terminal, the first terminal and the second terminal extend into the control box and are respectively connected with a radiating block and a control board through screws, mounting holes are formed in the radiating block and the control board, the terminals on the low-voltage wire harness deform in the screw tightening process, the connection reliability is affected, and even the control box is damaged. Accordingly, there is a need for a control box for a PTC heater to solve the above problems.

Disclosure of Invention

In order to solve the problems, in one aspect, the utility model provides a control box of a PTC heater, comprising a bottom shell and an upper cover, wherein the bottom shell and the upper cover are detachably connected, the upper cover and the bottom shell are enclosed to form a containing cavity and a wiring cavity, a first partition plate is arranged between the containing cavity and the wiring cavity, a control plate is arranged in the containing cavity, two copper nuts are arranged in the wiring cavity, the two copper nuts are respectively connected with an anode binding post and a cathode binding post, the anode binding post and the cathode binding post are both connected with the control plate, and screws for fixing the wiring terminal of a low-voltage wiring harness are arranged on the copper nuts.

Further, two wiring positions are arranged in the wiring cavity, a second partition plate is arranged between the two wiring positions, and the two copper nuts are respectively injection-molded on the two wiring positions.

Further, the positive terminal is connected with the drain pan is moulded plastics, the one end of positive terminal with copper nut is connected, and the other end extends to in the holding chamber with the control panel is connected, the control panel still is connected with the first electrode slice that is used for being connected with the core that generates heat.

Further, the negative terminal is connected with the drain pan in an injection molding way, one end of the negative terminal with the copper nut is connected, and the other end extends to the holding cavity and is connected with the control panel, still be equipped with on the negative terminal and be used for with the second electrode slice that generates heat the core and be connected.

Further, the device also comprises a heat dissipation block, wherein the heat dissipation block is arranged in the bottom shell and is positioned below the control panel.

Further, a plurality of MOS tubes are arranged on the control board, a boss is arranged on the radiating block corresponding to the position of the MOS tube, and heat conduction silicone grease is arranged between the boss and the MOS tube.

Further, a sealant is filled between the bottom shell and the upper cover.

Further, one end of the bottom shell is provided with a mounting column used for being connected with the core shell.

On the other hand, the utility model also provides a PTC heater, which comprises a heating core body, a core body shell and a control box, wherein the heating core body is arranged in the core body shell, the core body shell is connected with the control box, the control box is the control box, and the heating core body is connected with a control board in the control box.

Further, the low-voltage wire harness comprises a first wiring terminal and a second wiring terminal, and the first wiring terminal and the second wiring terminal are connected with corresponding copper nuts through screws respectively.

Compared with the prior art, the utility model has the following beneficial effects due to the adoption of the technical scheme:

1) According to the control box of the PTC heater, the accommodating cavity and the wiring cavity are arranged in the control box and are separated by the first partition plate to form two separation areas, the wiring cavity is connected with the low-voltage wire harness, so that the influence on a control board can be reduced, and the wiring cavity is internally provided with the copper nut, when the screw is screwed down to fix the low-voltage wire harness, the influence on the terminal of the low-voltage wire harness can be reduced, the deformation of the terminal under the action of torque is avoided, and the control box is not easy to damage;

2) According to the control box of the PTC heater, the copper nuts are injection-molded on the wiring positions of the bottom shell, so that the connection strength of the copper nuts and the bottom shell is improved, and the adjacent wiring positions are separated by the second partition plates, so that the insulativity between the positive terminal and the negative terminal is ensured;

3) According to the control box of the PTC heater, the sealant is filled in the control box, so that the control box can be ensured to meet the protection grade of IP 67;

4) According to the control box of the PTC heater, the heat conduction silicone grease is arranged between the boss of the radiating block and the MOS tube, so that the heat conduction and insulation effects between the MOS tube and the radiating block can be realized, the safety of the MOS tube is improved, and the service life of the MOS tube is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a control box of the present utility model;

FIG. 2 is another exploded view of the control box of the present utility model;

FIG. 3 is a schematic view of the internal structure of the control box of the present utility model;

FIG. 4 is a schematic view of the bottom case of the control box of the present utility model;

FIG. 5 is a partial cross-sectional view of the copper nut of the control box of the present utility model;

FIG. 6 is a schematic view of the structure of the upper cover of the control box of the present utility model;

fig. 7 is a schematic view of the structure of the PTC heater of the present utility model;

fig. 8 is an exploded view of the PTC heater of the present utility model;

fig. 9 is an exploded view of a core housing of the PTC heater of the present utility model;

fig. 10 is a schematic structural view of a core housing of the PTC heater of the present utility model;

fig. 11 is a schematic view of a portion a of fig. 10 in the PTC heater of the present utility model;

fig. 12 is a schematic view showing the structure of a heating core in the PTC heater of the present utility model;

fig. 13 is an exploded view of a heating core in the PTC heater of the present utility model.

1-a core housing; 11-a boss; 12-a base; 13-hollowing; 14-ventilation holes; 15-a first clamping groove; 16-a second clamping groove; 17-a second tongue; 2-a limiting structure; 21-a limiting plate; 22-shrapnel; 23-through holes; 3-a heating core; 31-heat dissipation strips; 311-first connection terminal; 312-a second connection; 32-ceramic chips; 33-fake sheets; 34-terminal; 4-a control box; 41-wiring cavity; 42-bottom shell; 421-first tongue; 422-a second slot; 43-upper cover; 431-first slot; 44-signal pins; 45-accommodating cavity; 46-a first separator; 47-a second separator; 5-control panel; 51-a first electrode sheet; 52-MOS tube; 53-positive terminal; 54-a negative terminal; 55-a second electrode sheet; 6-a heat dissipation block; 61-boss; 7-a low voltage harness; 71-a first terminal; 72-a second terminal; 73-sheath; 8-copper nuts; 9-screw.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model. In the drawings, the size and relative sizes of certain parts may be exaggerated for clarity.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected" and "coupled" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be used in any form, such as directly or indirectly through an intermediate medium, or may be used in any form of communication between two elements or in any form of interaction between two elements, and the terms are specifically understood by those of ordinary skill in the art.

In the description of the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "center", "horizontal", "vertical", "top", "bottom", "inner", "outer", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, in the description of the present utility model, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not necessarily for indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Example 1

As shown in fig. 1-6 of the specification, the utility model provides a control box of a PTC heater, which is used for the PTC heater, the control box 4 comprises a bottom shell 42 and an upper cover 43, the bottom shell 42 and the upper cover 43 are preferably made of plastic materials, the bottom shell 42 and the upper cover 43 are detachably connected, the upper cover 43 and the bottom shell 42 enclose to form a containing cavity 45 and a wiring cavity 41, a first partition 46 is arranged between the containing cavity 45 and the wiring cavity 41, a control board 5 is arranged in the containing cavity 45, the control board 5 is installed in the containing cavity 45 through bolts, two copper nuts 8 are arranged in the wiring cavity 41, the two copper nuts 8 are respectively connected with an anode terminal 53 and a cathode terminal 54, the anode terminal 53 and the cathode terminal 54 are respectively connected with the control board 5, a bolt 9 for fixing a terminal of a low-voltage wire harness is arranged on the copper nut 8, specifically, the copper nut 8 is connected with the terminal of the low-voltage wire harness is screwed into the copper nut 8, the bolt 9 is screwed into the copper nut 8, and the terminal of the low-voltage wire harness is pressed by the copper nut 8, and the low-voltage wire harness is connected with the terminal of the low-voltage wire harness.

Specifically, the upper cover 43 and the bottom shell 42 may be fixed by means of snap connection, threaded connection, etc., in this embodiment, a plurality of first inserting tongues 421 are provided on the bottom shell 42, a plurality of first inserting grooves 431 are correspondingly provided on the upper cover 43, the first inserting grooves 431 and the first inserting tongues 421 are arranged in a one-to-one correspondence manner, the upper cover 43 is mounted on the bottom shell 42, the first inserting tongues 421 are inserted into the first inserting grooves 431, so that the upper cover 43 and the bottom shell 42 can be clamped, the upper cover 43 and the bottom shell 42 can be quickly disassembled, and the control box can be quickly disassembled.

In an optimized embodiment, two wiring positions are arranged in the wiring cavity 41, a second partition plate 47 is arranged between the two wiring positions, on one hand, the strength of the bottom shell 42 can be enhanced, on the other hand, the positive wiring terminal 53 and the negative wiring terminal 54 can be insulated, the positive wiring terminal 53 and the negative wiring terminal 54 are prevented from being contacted, two copper nuts 8 are respectively injection-molded on the two wiring positions, the copper nuts 8 are integrally injection-molded with the bottom shell 42 of the control box, and at least the upper end face of the copper nuts 8 is ensured to be exposed, namely, the upper end face of the copper nuts 8 is flush with the wiring positions or the wiring positions are exposed for mounting wiring terminals of the wiring terminals and low-voltage wiring harnesses.

In an optimized mode, the positive terminal 53 is in injection molding connection with the bottom shell 42, one end of the positive terminal 53 is connected with the copper nut 8, the other end extends into the accommodating cavity 45 and is connected with the control board 5, a jack connected with the positive terminal 53 is arranged on the control board 5, a through hole for a screw 9 to pass through is arranged at one end of the positive terminal 53 and is coaxially arranged with the copper nut 8, one end of the positive terminal 53 can be sleeved on the copper nut 8 through the through hole or is attached to the end face of the copper nut 8, and the control board 5 is also connected with a first electrode plate 51 connected with a heating core body.

In an optimized mode, the negative electrode binding post 54 is in injection molding connection with the bottom shell 42, one end of the negative electrode binding post 54 is connected with the copper nut 8, the other end extends into the accommodating cavity 45 and is connected with the control board 5, a jack connected with the negative electrode binding post 54 is arranged on the control board 5, a through hole for a screw 9 to pass through is arranged at one end of the negative electrode binding post 54 and is coaxially arranged with the copper nut 8, one end of the negative electrode binding post 54 can be sleeved on the copper nut 8 through the through hole or is attached to the end face of the copper nut 8, and a second electrode plate 55 used for being connected with a heating core body is further arranged on the negative electrode binding post 54, namely the second electrode plate is also connected with the control board.

Specifically, a first terminal 71 and a second terminal 72 are arranged at one end of the low-voltage wire harness 7 connected with the control box 4, the first terminal 71 and the second terminal 72 are respectively connected with one copper nut 8, the screw 9 is screwed on the copper nut 8, so that the first terminal 71 and the second terminal 72 are communicated with the positive terminal 53 and the negative terminal 54, and in a traditional fixing mode, when the nuts are used, the terminals and the connecting ends on the low-voltage wire harness deform under the action of torque; in the utility model, the copper nut 8 and the binding post are injection molded in the control box 4, the binding post is arranged above the copper nut 8, the binding post and the binding post on the low-voltage wire harness cannot deform under the action of torque when the screw 9 is screwed in, the control box is provided with the wiring cavity, the wiring cavity is separated from the accommodating cavity, the control box cannot be influenced in the wiring process, and the control box is not easy to damage.

The optimized implementation manner further comprises a heat dissipation block 6, wherein the heat dissipation block 6 is arranged in the bottom shell 42, the heat dissipation block 6 is positioned in the accommodating cavity 45 and positioned below the control board 5, and the heat dissipation block 6 is preferably made of aluminum material and has good heat conduction and heat dissipation effects.

In an optimized embodiment, the control board 5 is provided with a plurality of MOS tubes 52, the heat dissipation block 6 is provided with a plurality of bosses 61, the bosses 61 are correspondingly arranged with the MOS tubes 52, heat conduction silicone grease is arranged between the bosses 61 and the MOS tubes 52, the heat dissipation block 6 has a heat dissipation function, a gap between the MOS tubes 52 and the bosses 61 is 2mm, and the heat generated by the MOS tubes 52 can be transmitted to the heat dissipation block 6 and timely dissipated through the heat conduction silicone grease by coating the heat conduction silicone grease on the bosses 61 for conducting heat and insulating, and on the other hand, the heat generated by the MOS tubes 52 is also in an insulating state between the bosses 61 and the MOS tubes 52.

In the optimized embodiment, after the heat dissipation block 6 and the control board 5 are assembled in the control box 4, the organic silicon gel is filled into the control box 4 for sealing, and the organic silicon gel is solidified at a high temperature, so that the protection level of the control box is improved. The heating core part of the PTC heater of this embodiment satisfies the protection level of IP54, and the control box part satisfies the protection level of IP 67.

In an optimized embodiment, one end of the bottom shell 42 is provided with a mounting post for connection with the core shell.

In an optimized embodiment, the bottom shell 42 of the control box is provided with a signal pin 44, the control board 5 is provided with a jack, and the signal pin 44 is inserted into the jack of the control board 5 and is connected through welding.

Example 2

As shown in fig. 7 and 8 of the specification, the present utility model further provides a PTC heater, which includes a heating core 3, a core housing, and a control box 4, where the heating core 3 is installed in the core housing, the core housing is connected to the control box 4, and the control box 4 is the control box described in embodiment 1, which is not described herein, and the heating core 3 is connected to a control board 5 in the control box 4.

As one of the embodiments, as shown in fig. 9-11 of the specification, the core housing includes a core housing 1, the core housing 1 is provided with a chamber for accommodating the heating core 3, two ends of the chamber are respectively provided with mounting portions and define a heating core mounting area through the two mounting portions, two sides of the heating core mounting area are respectively provided with a limiting structure 2 for propping against the side wall of the heating core 3, at least one group of limiting structures includes a limiting plate 21, and the limiting plate 21 is provided with a plurality of elastic sheets 22 arranged towards the heating core mounting area, so that the heating core is fixed, the heating core can be compressed while the heating core is rapidly mounted, and the parts in the heating core are ensured to be still in good contact under the condition of failure of silicone rubber. Specifically, one end of the cavity is provided with a first installation part connected with the heating core body 3, and the other end of the cavity is provided with a second installation part connected with the heating core body 3.

The control box 4 is installed on the first installation department of core shell 1, is provided with the second slot 422 on the drain pan 42, is provided with the second tongue 17 that inserts that corresponds to on the first installation department of core shell 1, and second tongue 17 and second slot 422 one-to-one set up, when being connected control box 4 and core shell 1, second tongue 17 can insert in second slot 422, realizes the detachable connection of control box 4 and core shell 1, can be quick to control box 4 and core shell 1 dismouting.

Specifically, the core housing 1 is preferably made of plastic materials, the limiting plate is preferably made of metal materials, the core housing 1 is of an integrated structure, the core housing 1 is square, a cavity for accommodating the heating core 3 is formed in the middle of the core housing, the size of the cavity is set according to the size of the heating core 3, the limiting structure is arranged along the side wall of the core housing and is used for being abutted against the side wall of the heating core 3 to be used for compressing the heating core 3, in actual use, the limiting plate 21 is arranged on one side wall of the core housing 1, one side of the heating core 3 is compressed, the limiting plates 21 are arranged on two opposite side walls of a mounting area of the heating core, two sides of the heating core 3 can be compressed, and the limiting plates can be arranged according to actual requirements; the limiting plate 21 can be adhered, screwed or injection-molded with the core housing 1.

According to the optimized implementation mode, the limiting structure 2 is formed by integrally injection molding the core body shell 1, the limiting structure 2 is arranged along the side wall of the core body shell 1, the limiting structure 2 and the core body shell 1 are integrally injection molded, the heating core body 3 is installed in the cavity of the core body shell 1, two ends of the heating core body 3 are respectively limited by the first installation part and the second installation part, the side wall of the heating core body 3 can be pressed and fixed through the limiting structure 2, the installation of the heating core body 3 can be rapidly realized, the assembly efficiency is accelerated, the use of shell structural members is reduced, and the cost is reduced.

In an optimized embodiment, one group of limiting structures comprises a limiting plate 21, the other group of limiting structures comprises a plurality of protruding portions 11 arranged on the inner walls of the corresponding sides of the core shell 1, the protruding portions 11 are arranged towards the installation area of the heating core in a protruding mode, specifically, the limiting plate 21 is arranged on one side wall of the core shell 1, a spring piece 22 on the limiting plate 21 is arranged towards the installation area of the heating core, a plurality of protruding portions 11 are arranged on the inner walls of the corresponding sides of the core shell 1 to form another limiting structure, the protruding portions 11 are arranged towards the installation area of the heating core, the bottoms of the protruding portions 11 are connected with the core shell 1, and the tops of the protruding portions are arranged towards the installation area of the heating core, so that on one hand, the strength of the core shell 1 can be enhanced, on the other hand, the protruding portions can be matched with the limiting plate 21, the heating core 3 is pressed, and the heating core 3 is fixed in the core shell 1.

According to the refinement implementation mode, the side wall of the core shell 1 of the limiting plate 21 is provided with a plurality of bases 12, hollowed-out parts 13 are arranged between every two adjacent bases 12, elastic pieces 22 on the limiting plate 21 are arranged at intervals, through holes 23 are formed between every two adjacent elastic pieces 22, after the limiting plate 21 and the core shell 1 are injection molded together, the elastic pieces 22 on the limiting plate 21 are arranged at positions corresponding to the hollowed-out parts 13, the through holes 23 on the limiting plate 21 are arranged at positions corresponding to the bases 12 of the core shell 1, the connecting strength between the limiting plate 21 and the core shell 1 can be enhanced after the through holes 23 are injection molded, the bases 12 can play a supporting role, ventilation holes 14 are formed at the positions of the bases 12 and the hollowed-out parts 13, air convection can be enhanced, and heat exchange efficiency is improved.

According to the refinement implementation mode, the core shell 1 is provided with the plurality of ventilation holes 14, specifically, the protruding portion 11 and the two side walls of the limiting plate 21 are provided with the plurality of ventilation holes 14, so that air convection can be enhanced, heat exchange efficiency is improved, heat generated by the heating core 3 is emitted, and heat dissipation efficiency is improved on the premise of ensuring the strength of the core shell 1.

In an optimized embodiment, the first installation part comprises a plurality of first clamping grooves 15, the second installation part comprises a plurality of second clamping grooves 16, specifically, the two ends of the core shell 1 are provided with the first clamping grooves 15 and the second clamping grooves 16 connected with the two ends of the heating core body 3, the two ends of the heating core body 3 can be fixed, and the number and the position of the first clamping grooves 15 and the second clamping grooves 16 are set according to the structure of the heating core body.

The optimized embodiment further comprises a low-voltage wire harness 7, wherein a first wiring terminal 71 and a second wiring terminal 72 are arranged at one end of the low-voltage wire harness 7, a sheath 73 is arranged at the other end of the low-voltage wire harness 7, specifically, the first wiring terminal 71 and the second wiring terminal 72 are respectively connected with one copper nut 8, a screw 9 is screwed on the copper nut 8, so that the first wiring terminal 71 and the second wiring terminal 72 are communicated with the positive wiring terminal 53 and the negative wiring terminal 54, and in a traditional fixing mode, when nuts are used, the connection ends on the wiring terminal and the low-voltage wire harness deform under the action of torque; in the utility model, the copper nut 8 and the binding post are injection molded in the control box 4, the binding post is arranged above the copper nut 8, the binding post and the binding post on the low-voltage wire harness cannot deform under the action of torque when the screw 9 is screwed in, the control box is provided with the wiring cavity, the wiring cavity is separated from the accommodating cavity, the control box cannot be influenced in the wiring process, and the control box is not easy to damage.

In an optimized embodiment, as shown in fig. 12 and 13 of the specification, the heating core 3 includes at least two heat dissipation strips 31, at least one ceramic chip 32 is disposed between every two adjacent heat dissipation strips 31, the ceramic chip 32 is attached between the sidewalls of two adjacent heat dissipation strips, preferably, at least one dummy plate 33 is disposed between every two adjacent heat dissipation strips, the dummy plate plays a supporting role, the ceramic chip can be protected, the dummy plate and the ceramic chip are disposed side by side, and the protruding portions and the limiting plates are disposed on two sides of the outermost heat dissipation strip, so that the heat dissipation strips can be abutted tightly, and further, the ceramic chip and the heat dissipation strips can be reliably contacted. According to the embodiment, a plurality of ceramic chips 32 and dummy pieces 33 are adhered between adjacent heat dissipation strips 31 along the vertical direction at intervals, then baking and curing are carried out to form a heating core body 3, and side dispensing is carried out on the ceramic chips and the dummy pieces, so that silicon rubber is coated on the ceramic chips and the dummy pieces, the salt spray resistance of the ceramic chips is improved, and salt spray resistance can be improved for 168 hours.

Specifically, the heating core 3 includes at least two heat dissipation strips 31, one end of each heat dissipation strip 31 is provided with a first connection end 311 extending out, the first connection end 311 is disposed corresponding to the first clamping groove 15 of the core housing 1, the first connection end 311 is in pressure connection with the terminal 34, the terminal 34 is also disposed in the first clamping groove 15, the second electrode piece 55 (negative electrode) and the first electrode piece 51 (positive electrode) are alternately arranged, bottoms of adjacent first electrode piece 51 and second electrode piece 55 are respectively connected with adjacent terminals 34 in an opposite inserting manner, and polarities of the first electrode piece 51 and the second electrode piece 55 are opposite. In this embodiment, the assembled heating core 3 is installed in the core housing 1, the limiting plate 21 can compress the heat dissipation strip 31, so that the connection between the heat dissipation strip 31 and the ceramic chip 32 is more reliable, the phenomenon of poor contact caused by aging of adhesive is avoided, the terminal 34 is connected to the heat dissipation strip 31, the control box 4 is assembled with the core housing 1, the adjacent first electrode plate 51 and the adjacent second electrode plate 55 are respectively connected with the adjacent terminal 34 in an opposite way, the ceramic chip 32 between the heat dissipation strips 31 is electrified, the adjacent first electrode plate 51 and the adjacent second electrode plate 55 are respectively connected with the adjacent terminal 34 in an opposite way, the installation is convenient, the contact resistance after opposite insertion is small, the power loss is small, and the safety is high; the other end of the heat dissipation strip 31 is provided with a second connection end 312, the second connection end 312 is arranged corresponding to the second clamping groove 16 of the core body shell 1, the second connection end 312 can be inserted into the second clamping groove 16 to be fixed, and then the head of the heating core body 3 is pressed into the first clamping groove 15, so that the assembly of the heating core body is completed.

In a refinement, when the heating core 3 includes more than two heat dissipation strips 31, the ceramic chips 32 between the adjacent heat dissipation strips 31 are connected in parallel with the ceramic chips 32 between the other adjacent heat dissipation strips 31, and the heating power of the heater is increased or reduced by the PWM control module, so as to meet different requirements of customers.

The PTC heater in the embodiment has a control function, controls the power output through a LIN communication mode, and simultaneously has the protection functions of soft start, overvoltage protection, undervoltage protection, overcurrent protection, overheat protection and the like, so that the safety of products and personnel is ensured.

The PTC heater in the embodiment meets the dust-proof and waterproof grade requirements of the air conditioning system of the new energy automobile, can be safely and reliably applied to the air conditioning system of the new energy automobile, can heat the air in the automobile, then blows the hot air to all positions in the automobile through the air conditioning duct system by the air conditioning blower, has the advantages of high heating efficiency, high power, good safety and the like, and can be widely applied to the air conditioning system of the automobile.

It will be appreciated by those skilled in the art that the utility model can be embodied in many other specific forms without departing from the spirit or scope of the utility model. Although an embodiment of the present utility model has been described, it is to be understood that the utility model is not limited to this embodiment, and that variations and modifications may be effected by one skilled in the art within the spirit and scope of the utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a PTC heater's control box, includes drain pan and upper cover, the connection can be dismantled to drain pan and upper cover, its characterized in that, the upper cover with the drain pan encloses to close and forms holding chamber and wiring chamber, the holding chamber with be equipped with first baffle between the wiring chamber, the holding intracavity is equipped with the control panel, the wiring intracavity is equipped with two copper nuts, two copper nuts are connected with anodal terminal and negative pole terminal respectively, anodal terminal with the negative pole terminal all with the control panel is connected, be equipped with the screw that is used for fixing the wiring end of low pressure pencil on the copper nut.

2. A PTC heater control box according to claim 1 wherein two connection locations are provided in the connection chamber, a second spacer is provided between the two connection locations, and two copper nuts are respectively injection-molded on the two connection locations.

3. A PTC heater control box according to claim 1 wherein the positive terminal is injection-molded with the bottom case, one end of the positive terminal is connected with the copper nut, the other end extends into the accommodation chamber and is connected with the control board, and the control board is further connected with a first electrode sheet for connection with a heat generating core.

4. The PTC heater control box according to claim 1, wherein the negative terminal is injection-molded with the bottom case, one end of the negative terminal is connected with the copper nut, the other end extends into the accommodating chamber and is connected with the control board, and a second electrode sheet for connection with the heat generating core is further provided on the negative terminal.

5. A control box for a PTC heater according to claim 1, further comprising a heat sink provided in the bottom case below the control board.

6. The PTC heater control box according to claim 5, wherein the control board is provided with a plurality of MOS tubes, the heat sink is provided with a boss at a position corresponding to the MOS tubes, and a heat conductive silicone grease is provided between the boss and the MOS tubes.

7. A PTC heater control box according to claim 1, wherein a sealant is filled between the bottom case and the upper cover.

8. A control box for a PTC heater according to claim 1, wherein one end of the bottom case is provided with a mounting post for connection with the core case.

9. The PTC heater comprises a heating core body, a core body shell and a control box, wherein the heating core body is arranged in the core body shell, and the core body shell is connected with the control box.

10. A PTC heater according to claim 9, further comprising a low voltage harness comprising a first terminal and a second terminal, the first terminal and the second terminal being connected to corresponding copper nuts, respectively, by screws.