CN217849702U - PTC heater assembly - Google Patents

Abstract

The utility model provides a PTC heater assembly, including control box, the core that generates heat, first heating core shell, second generate heat core shell, core ground connection pencil, be used for the earth's bonding wire, be equipped with the controller in the control box, the core that generates heat is fixed first heating core shell with the second generates heat between the core shell, first heating core shell with the second generates heat the core shell all with control box fixed connection, the electrode of the core that generates heat stretches into in the control box, the electrode of the core that generates heat with the controller electricity is connected, the control box includes the plastic casing and inlays the metal on the plastic casing and inserts, the one end of ground connection core pencil the core side that generates heat links to each other, the other end of core ground connection pencil the controller the bonding wire all with the metal is inserted and is linked to each other.

Description

PTC heater assembly

Technical Field

The utility model relates to a new energy automobile air conditioner air heater field especially relates to a PTC heater assembly.

Background

New energy automobiles have been the trend of future automobile development. Unlike traditional fuel vehicles, new energy vehicles have no engine, which causes heating in vehicles to be a problem, and PTC as a positive temperature coefficient semiconductor material can generate heat in a power-on state, and has the advantages of high heating efficiency, high power, no open fire and the like. The service life of the normal work can reach 10 ten thousand hours. The PTC heater has the working principle that the PTC chip is electrified to generate heat, and the heat is taken away by the air blower, so that the heating, defrosting and defogging functions of the whole vehicle are realized.

The structure of the present PTC heater has disadvantages, and therefore, there is a need for a new PTC heater assembly to further improve the structure of the PTC heater.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect of prior art, provide a PTC heater assembly, the utility model discloses partial problem among the prior art has been solved at least.

The utility model discloses a realize like this:

the utility model provides a PTC heater assembly, including control box, the core that generates heat, first heating core shell, second generate heat core shell, core ground connection pencil, be used for the earth's bonding wire, be equipped with the controller in the control box, the core that generates heat is fixed first heating core shell with the second generates heat between the core shell, first heating core shell with the second generates heat the core shell all with control box fixed connection, the electrode of the core that generates heat stretches into in the control box, the electrode of the core that generates heat with the controller electricity is connected, the control box includes the plastic casing and inlays the metal on the plastic casing and inserts, the one end of ground connection core pencil the core side that generates heat links to each other, the other end of core ground connection pencil the controller the bonding wire all with the metal is inserted and is linked to each other.

Further, the other end of the core body grounding wire harness and the controller are installed on the metal insert through first screws, and the bonding wire is installed on the metal insert through second screws.

Further, a first temperature sensor is further installed on the side edge of the heating core body, and the first temperature sensor is electrically connected with the controller.

Furthermore, a second temperature sensor for detecting the temperature of the controller is mounted on the metal insert, and the second temperature sensor is electrically connected with the controller.

Further, still be equipped with the IGBT module in the control box, the IGBT module with the controller welding, the controller passes through the IGBT module and is connected with the electrode electricity of the core that generates heat, it has insulating heat conduction membrane to paste on the metal insert, still be equipped with the nonrust steel sheet that makes the IGBT module hug closely insulating heat conduction membrane in the control box, nonrust steel sheet is the M type, the both ends and the metal of nonrust steel sheet are inserted fixed connection.

Further, the metal insert is arranged at the bottom of the control box and extends towards the outer side of the control box.

Further, install the jack catch of being connected with the controller electricity on the controller, still be equipped with the adapter in the control box, the electrode of the core that generates heat stretches into in the control box and with copper bar welding on the adapter, the copper bar insert in the jack catch and with the jack catch electricity is connected.

Further, be equipped with embedment silica gel in the cavity of control box, embedment silica gel is used for sealing control box and the core junction that generates heat, and the heating pipe bottom of the core that generates heat also is sealed through silica gel.

Furthermore, the PTC heater assembly further comprises a low-voltage connector and a high-voltage connector, wherein the low-voltage connector and the high-voltage connector are respectively fixed on the control box in a flange mode through screws.

Furthermore, the PTC heater assembly further comprises a waterproof vent valve, and the waterproof vent valve is arranged on the control box.

The utility model discloses following beneficial effect has:

1. the IGBT module is tightly attached to the metal insert by the stainless steel sheet, the metal insert extends downwards to an air duct inside the air conditioner box body, heat of the IGBT module is taken away by air with lower temperature through the heat-conducting insulating film and the metal insert, and the heat dissipation effect of the IGBT module is good.

2. Electrode on the core and the copper bar welding on the adapter generate heat, in the jack catch of copper bar insertion controller to realize the controller and be connected of the core that generates heat, the adapter has increased the distance of the core and the controller that generate heat, and the separation core that generates heat avoids the control area high temperature to the heat transfer of controller.

3. After the core inserts the control box that generates heat, embedment silica gel in the cavity that the control box formed with the core that generates heat, can realize the fixed of the core that generates heat and improve the waterproof dustproof grade of product, the heating pipe bottom of the core that generates heat also is sealed through silica gel, and the last lower extreme of heating pipe is all sealed through silica gel, has promoted sealing performance.

4. The control box is provided with a waterproof vent valve which is used for balancing the air pressure inside and outside the control box and is used as a heating device, and the air pressure balance in the control box can effectively ensure the sealing reliability and the service life.

5. The utility model discloses in, the mounting structure of controller, IGBT module, the core and the control box that generate heat all adopts detachable construction. Greatly reducing the disassembling difficulty and the after-sale cost, and facilitating the after-sale maintenance.

6. The utility model discloses in, the control box of PTC heater assembly does not use the all-metal material, has still satisfied the product and has leaked the safety requirement of the whole ground connection of metal part outward to alleviateed product weight, the utility model discloses the structure to the PTC heater has effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of a PTC heater assembly according to an embodiment of the present invention;

fig. 2 is a sectional view illustrating the installation of the control box and the mating parts according to the embodiment of the present invention;

fig. 3 is an assembly outline view of a PTC heater assembly according to an embodiment of the present invention.

In the figure: 1. a first heat generating core housing; 2. a second heat generating core housing; 3. a heating core; 4. a first temperature sensor; 5. a core ground wire harness; 6. a control box; 7. a transfer seat; 8. a controller; 9. a control box cover plate; 10. bonding wires; 11. a low voltage connector; 12. a high voltage connector; 13. a first screw; 14. an IGBT module; 15. a waterproof vent valve; 16. a jaw; 17. a metal insert; 18. a second temperature sensor; 19. a stainless steel sheet; 20. a second screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

As shown in fig. 1-3, the embodiment of the utility model provides a PTC heater assembly, including control box 6, the core 3 that generates heat, first heating core shell 1, second heating core shell 2, core ground wire harness 5, with vehicle connection be used for grounded bond wire 10, be equipped with controller 8 in the control box 6, the heating core 3 is fixed first heating core shell 1 with between the second heating core shell 2, first heating core shell 1 with second heating core shell 2 all with control box 6 fixed connection, the electrode of heating core 3 stretches into in the control box 6, the electrode of heating core 3 with controller 8 electricity is connected, control box 6 includes the plastic casing and inlays metal insert 17 on the plastic casing, the one end of core ground wire harness 5 the heating core 3 side links to each other, the other end of core ground wire harness 5 controller 8 the bond wire 10 all with metal insert 17 links to each other.

The main structure of the control box 6 is plastic, a metal insert 17 is embedded during injection molding, and the metal insert 17 is combined with the plastic to ensure the whole sealing performance of the control box through a rib and groove structure. And the metal insert 17 of the control box 6 is connected with the core body grounding wire harness 6, the controller 8 and the bonding wire 10 to realize the grounding function.

The other end of the core ground wire harness 5 and the controller 8 are both mounted on the metal insert 17 through a first screw 13, and the bond wire 10 is mounted on the metal insert 17 through a second screw 20. The core grounding wire harness 5, the controller 8 and the bonding wire 10 are all installed on a metal insert 17 of the control box 6, and the core grounding wire harness 5 is installed on the side surface of the heating core 3. The metal parts of the heater are mutually connected, and finally are connected with the vehicle to be grounded through a bonding wire 10. The bonding wire 10 is installed on a metal insert 17 of the control box 6 through a second screw 20, and the bonding wire 10 is grounded for the whole vehicle, so that all the leakage metal parts of the product are grounded.

The side of the heating core body 3 is also provided with a first temperature sensor 4, the first temperature sensor 4 is used for detecting the temperature of the heating core body 3, and the first temperature sensor 4 is electrically connected with the controller 8. The side of the heating core body 3 is provided with a first temperature sensor 4 and a core body grounding wire harness 5, after the first temperature sensor 4 and the core body grounding wire harness 5 are inserted into a preformed hole at the bottom of the control box 6, the first temperature sensor 4 is electrically connected with the controller 8, and the core body grounding wire harness 5 and the controller 8 are both installed on the metal insert 17 through a first screw 13.

The metal insert 17 is provided with a second temperature sensor 18 for detecting the temperature of the controller 8, and the second temperature sensor 18 is electrically connected with the controller 8, so that the control area can work at normal temperature, and the reliability of the product is improved.

Still be equipped with IGBT module 14 (IGBT is the insulated gate bipolar transistor) in the control box 6, IGBT module 14 with controller 8 welding (electricity is connected), controller 8 is connected with the electrode electricity of the core 3 that generates heat through IGBT module 14, metal insert 17 top is pasted and is had insulating heat-conducting film, still be equipped with in the control box 6 and make the stainless steel piece 19 of insulating heat-conducting film is hugged closely to IGBT module 14 bottom, and stainless steel piece 19 is the M type, and the tight IGBT module 14 in middle part top of stainless steel piece 19, the both ends of stainless steel piece 19 adopt the fix with screw on metal insert 17.

In this embodiment, the insert 17 is provided at the bottom of the control box 6, and the insert 17 extends to the outside of the control box 6. The metal insert 17 is connected with the plastic shell at the joint position through a rib and groove structure, so that the whole sealing performance of the control box is ensured. The metal insert 17 extends downwards, namely towards the heating core body 3, and the main body part of the heating core body 3 is positioned in an air duct inside the air conditioner box body.

The IGBT module 14 is tightly attached to the metal insert 17 through the stainless steel sheet 19, the metal insert 17 extends downwards to an air duct inside the air conditioning box body, heat of the IGBT module 14 is taken away by air with lower temperature through the heat-conducting insulating film and the metal insert 17, and in the embodiment, the metal insert 17 is an aluminum insert.

All control parts, namely the controller 8 and the IGBT module 14 are installed together with other structures through detachable parts, so that the disassembling difficulty and the after-sale cost are greatly reduced.

Install jack catch 16 with the controller 8 electricity is connected on the controller 8, still be equipped with adapter 7 in the control box 6, the electrode of the core 3 that generates heat stretch into in the control box 6 and with copper bar welding (electricity) on the adapter 7 is connected, the copper bar insert in the jack catch 16 and with the jack catch 16 electricity is connected. The 3 electrode welding of core that generates heat is on the copper bar of adapter 7, the copper bar inserts in the jack catch 16 of controller 8 to realize controller 8 and the core 3's that generates heat being connected, adapter 7 can play the thermal effect of separation, prevents that heat transfer from leading to the control area high temperature to the control area.

The copper bar welding on the electrode on the core 3 and the adapter 7 generates heat, and adapter 7 will generate heat all electrodes on the core 3 and converge into the positive and negative two poles, compare in the direct and controller 8 connection of core 3 that generates heat, has reduced the controller area, and adapter 7 has increased the distance of core 3 and controller 8 that generates heat, and the separation core 3 that generates heat is to the heat transfer of controller 8.

Be equipped with embedment silica gel in the cavity of control box 6, embedment silica gel is used for sealing control box 6 and 3 junctions of the core that generates heat, has guaranteed control area's waterproof performance, and the heating pipe bottom of the core 3 that generates heat is also sealed through silica gel.

First heating core shell 1 and second generate heat core shell 2 and pass through buckle and screw interconnect, the core 3 that generates heat is fixed between first heating core shell 1 and second heating core shell 2, first heating core shell 1 and second generate heat core shell 2 all through screw and 6 fixed connection of control box, after core 3 inserts control box 6 generates heat, embedment silica gel in the cavity that control box 6 and the core 3 that generates heat formed, can realize the fixed of core 3 that generates heat and improve the waterproof dustproof grade of product, the heating pipe bottom (the lower extreme of heating pipe in the picture) of core 3 that generates heat also seals through silica gel, the upper and lower extreme of heating pipe all seals through silica gel, sealing performance has been promoted.

The PTC heater assembly further comprises a low-voltage connector 11 and a high-voltage connector 12, the high-voltage connector 12 and the low-voltage connector 11 are installed in a plate end mode, and the low-voltage connector 11 and the high-voltage connector 12 are respectively fixed on the control box 6 through screws in a flange mode. The low-voltage connector 11 and the high-voltage connector 12 are both electrically connected to the controller 8.

The PTC heater assembly further comprises a waterproof vent valve 15, and the waterproof vent valve 15 is arranged on the control box 6. The waterproof ventilation valve 15 is used for balancing the air pressure inside and outside the control box 6 and is used as a heating device, and the air pressure balance in the control box 6 can effectively guarantee the sealing reliability and the service life.

The PTC heater assembly further comprises a control box cover plate 9, and silica gel is adopted between the control box cover plate 9 and the control box 6 for sealing. Specifically, the control box cover plate 9 and the control box 6 are matched by using a rib groove and sealed by glue filling.

The low voltage connector 11, the first temperature sensor 4 and the second temperature sensor 18 are all electrically connected to the controller 8. The controller 8 is electrically connected with the electrode of the heating core body 3 through the IGBT module 14, the high-voltage connector 12 is electrically connected with the heating core body 3 to provide high voltage electricity for the heating core body 3, the controller 8 adjusts and controls the duty ratio of the PWM pulse signal of the IGBT module 14 to control the heating power of the heating core body 3, and the increase or decrease of the duty ratio is controlled to realize the heating power of the stepless regulation PTC heater.

The PTC heater assembly receives a signal from the whole vehicle end through the low-voltage connector 11, the high-voltage connector 12 receives high voltage, and the duty ratio of the high voltage received by the heating core body 3 is adjusted by judging the signal from the whole vehicle end and the information of the first temperature sensor 4 and the second temperature sensor 18 through the controller 8, so that the function of controlling the heating power is achieved.

The utility model provides a PWM control PTC heater assembly, the duty cycle of the PWM pulse signal of controller adjustment control IGBT module to the power of generating heat of the core that controls generates heat has the electrodeless regulatory function of gear, and low pressure connector and temperature sensor all are connected with the controller electricity, can adjust self power according to ambient temperature, and not only energy-conservation can also improve whole car travelling comfort.

The utility model provides a PWM control type PTC heater assembly, mainly used new energy automobile air conditioning system heater, the control area closes formula as an organic whole with the district that generates heat, the assembly of being convenient for. Inside, 3 electrode welding of core that generate heat are on the copper bar of adapter 7, and the copper bar inserts controller 8's jack catch again, and adapter 7 is used for the separation heat, prevents heat transfer to control area and leads to the control area high temperature. The heat dissipation mode of the IGBT module 14 is that an aluminum block (a metal insert 17) is embedded in the control box 6, the aluminum insert extends to an air duct inside the air conditioner box body, and the heat of the IGBT module 14 is taken away by air with lower temperature through a heat-conducting insulating film and the aluminum insert. The high-voltage connector 12 and the low-voltage connector 11 are both mounted in a plate-end manner. The 3 electrodes of core that generate heat weld on the copper bar of adapter 7, the jack catch on the copper bar insertion controller 8 to realize controller 8 and the core 3's that generates heat being connected.

The control box 6 and the heating core body 3 are combined to form a cavity, and the cavity is filled with glue for sealing. The core grounding wire harness 5, the controller 8 and the bonding wire 10 are all installed on a metal insert 17 of the control box 6, and the core grounding wire harness 5 is installed on the side surface of the heating core 3. The metal parts of the heater are mutually connected, and finally are connected with the vehicle to be grounded through a bonding wire 10. The controller 8 is installed inside the control box 6 through a first screw 13, and the copper bar of the adapter 7 is inserted into a clamping jaw of the controller 8.

After the heating core body 3 and the control box 6 are assembled, a cavity is formed, and glue is filled in the cavity to fix the relative positions of the heating core body and the control box and improve the sealing performance. The bottom of the IGBT module 4 is tightly attached to an insulating heat-conducting film adhered to the metal insert, and the IGBT module 4 is fixed through a stainless steel sheet 19.

The product receives a signal of the whole vehicle end through the low-voltage connector 11, the high-voltage connector 12 receives high voltage, and the duty ratio of the high voltage received by the heating core body 3 is adjusted by the controller 8 through judging the signal of the whole vehicle end and the information of the first temperature sensor 4 and the second temperature sensor 18, so that the function of controlling the heating power is achieved.

The heating core 3 is fixed in between the first heating core shell 1 and the second heating core shell 2, the 3 sides of the heating core are equipped with a first temperature sensor 4 and a core ground wire harness 5, the heating core 3, the first temperature sensor 4 and the core ground wire harness 5 are inserted through a preformed hole at the bottom of the control box 6, the first heating core shell 1 and the second heating core shell 2 are both fixedly connected with the control box 6 through screws, and the glue filling is sealed in a cavity formed after the assembly of the heating core 3 and the control box 6. The electrode on the heating core body 3 is welded with the copper bar on the adapter 7, and the copper bar is inserted into the claw 16 of the controller 8. The controller 8 is mounted inside the control box 6 by means of a first screw 13. The core body grounding wire harness 5 is installed on a metal insert 17 of the control box 6 through a first screw 13, the low-voltage connector 11 and the high-voltage connector 12 are respectively fixed on the control box 6 through screws in a flange mode, the bonding wire 10 is installed on the metal insert 17 of the control box 6 through a second screw 20, and a control box cover plate 9 and the control box 6 are matched through a rib groove and sealed through glue filling.

Specifically, the first heating core housing 1 and the second heating core housing 2 are connected with each other through a buckle and a screw, and the heating core 3 is fixed between the first heating core housing 1 and the second heating core housing 2. The first heating core shell 1 and the second heating core shell 2 are connected with the control box 6 through screws. The bottom of the heating tube of the heating core body 3 is sealed by silica gel. After the first heating core shell 1, the second heating core shell 2 and the heating core 3 are connected with the control box 6, a plurality of components are mutually assembled to form a cavity, silica gel is poured from top to bottom, the assembly relation is further strengthened, and the waterproof performance is improved.

As shown in fig. 2, the heating core 3 is connected to the metal insert 17 through the core grounding wire harness 5, the controller 8 is connected to the metal insert 17, the bonding wire 10 is connected to the metal insert 17 through the second bolt 20, and the bonding wire 10 is grounded for the whole vehicle, so that all the metal parts leaking outside the product are grounded.

As shown in fig. 2, the IGBT module 14 is attached to the metal insert 17 by the stainless steel sheet 19, and the metal insert 17 extends downward to the ventilation position of the air conditioning box to take away the heat generated during the operation of the IGBT module 14. The metal insert 17 is provided with a second temperature sensor 18, so that the control area can work at normal temperature, and the reliability of the product is improved.

As shown in fig. 2, the controller 8 and the IGBT module 14 are welded together, the IGBT module 14 is attached to the metal insert 17 by the stainless steel sheet 19, the controller 8 is installed inside the control box 6 by the first screw 13, and the controller 8 is connected to the adapter 7 by the claw 16. All control parts, namely the controller 8 and the IGBT module 14 are installed together with other structures through detachable parts, so that the disassembling difficulty and the after-sale cost are greatly reduced.

The joint of the control box 6 and the heating core body 3 is sealed by silica gel. The waterproof performance of the control area is ensured.

Those not described in detail in this specification are well within the skill of the art.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A PTC heater assembly, comprising: including control box, the core that generates heat, first heating core shell, second generate heat core shell, core ground connection pencil, be used for the bonding wire of ground connection, be equipped with the controller in the control box, the core that generates heat is fixed first heating core shell with the second generates heat between the core shell, first heating core shell with the second generates heat the core shell all with control box fixed connection, the electrode of the core that generates heat stretches into in the control box, the electrode of the core that generates heat with the controller electricity is connected, the control box includes the plastic casing and inlays the metal on the plastic casing and insert, the one end of core ground connection pencil the core side that generates heat links to each other, the other end of core ground connection pencil the controller the bonding wire all with the metal is inserted and is linked to each other.

2. A PTC heater assembly according to claim 1, wherein: the other end of the core body grounding wire harness and the controller are installed on the metal insert through first screws, and the bonding wire is installed on the metal insert through second screws.

3. A PTC heater assembly according to claim 1, wherein: the side of the heating core body is also provided with a first temperature sensor which is electrically connected with the controller.

4. A PTC heater assembly according to claim 1 wherein: and a second temperature sensor for detecting the temperature of the controller is arranged on the metal insert and is electrically connected with the controller.

5. A PTC heater assembly according to claim 1, wherein: still be equipped with the IGBT module in the control box, the IGBT module with the controller welding, the controller passes through the IGBT module and is connected with the electrode electricity of the core that generates heat, it has insulating heat conduction membrane to paste on the metal insert, still be equipped with the nonrust steel sheet that makes the IGBT module hug closely insulating heat conduction membrane in the control box, nonrust steel sheet is the M type, the both ends and the metal of nonrust steel sheet are inserted fixed connection.

6. A PTC heater assembly according to claim 5, wherein: the metal insert is arranged at the bottom of the control box and extends towards the outer side of the control box.

7. A PTC heater assembly according to claim 1, wherein: the controller is provided with a clamping jaw electrically connected with the controller, a switching seat is further arranged in the control box, an electrode of the heating core body extends into the control box and is welded with a copper bar on the switching seat, and the copper bar is inserted into the clamping jaw and is electrically connected with the clamping jaw.

8. A PTC heater assembly according to claim 1, wherein: be equipped with embedment silica gel in the cavity of control box, embedment silica gel is used for sealing control box and the core junction that generates heat, and the heating pipe bottom of the core that generates heat also is sealed through silica gel.

9. A PTC heater assembly according to claim 1, wherein: the low-voltage connector and the high-voltage connector are respectively fixed on the control box through screws in a flange mode.

10. A PTC heater assembly according to claim 1 wherein: the waterproof ventilation valve is arranged on the control box.

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