CN211290540U

CN211290540U - PTC air heater

Info

Publication number: CN211290540U
Application number: CN201922293646.4U
Authority: CN
Inventors: 王玮; 吴强; 孙雨; 张文鹏; 杨光
Original assignee: Xiaogan Huagong Gaoli Electron Co Ltd
Current assignee: Xiaogan Huagong Gaoli Electron Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-18
Anticipated expiration: 2029-12-19

Abstract

The utility model provides a PTC air heater, including casing, controller and temperature sensor, the controller install in on the surface of casing, be equipped with a plurality of PTC heating unit in the casing, adjacent two be equipped with a heat dissipation strip between the PTC heating unit, temperature sensor installs on one of them heat dissipation strip, temperature sensor is located between two corresponding PTC heating unit, temperature sensor electric connection director. The utility model provides a PTC air heater fixes PTC heating element department with temperature sensor, has reduced temperature sensor's measuring error for the controller accuse temperature is more accurate, has realized vehicle air conditioner temperature regulation optimization.

Description

PTC air heater

Technical Field

The utility model relates to an automobile air conditioner heater field especially relates to a PTC air heater.

Background

The temperature detection accuracy of the automobile air conditioner heater determines the effect of an automobile air conditioner control strategy, and the optimization of the temperature regulation of the automobile air conditioner can be realized only by accurately detecting the temperature of an air inlet and an air outlet of the heater, so that the key is how to fix the temperature sensor and determine the position of the sensor.

At present, a plurality of PTC air heaters are not additionally provided with a temperature sensor on a heating body, a part of air heaters are provided with the sensor on the side surface of a core body, and the side surface of the PTC air heaters is blocked by a shell body and is not blown by air, so that great error exists in the feedback of the real temperature of the heating body, particularly for a heating device with a controller, the accuracy of a control strategy of the heater is influenced, and the difference between the detection value of the outlet air temperature and the actual temperature is great.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a PTC wind heater for temperature sensor's measured value is more close actual temperature.

The utility model discloses a realize like this:

the utility model provides a PTC air heater, including casing, controller and temperature sensor, the controller install in on the surface of casing, be equipped with a plurality of PTC heating unit in the casing, adjacent two be equipped with a heat dissipation strip between the PTC heating unit, temperature sensor installs on one of them heat dissipation strip, temperature sensor is located between two corresponding PTC heating unit, temperature sensor electric connection director.

Preferably, the top of heat dissipation strip is equipped with the kink, temperature sensor installs on the kink.

Preferably, an installation plate is arranged on a shell of the temperature sensor, the installation plate is fixedly connected with the bent part through a screw, the installation plate is located above the bent part, and the temperature sensor penetrates through the bent part.

Preferably, each PTC heating unit all includes an aluminum pipe, all be equipped with PTC heating base member in the aluminum pipe, PTC heating base member and aluminum pipe contact's surface cladding has the polyimide film, PTC heating base member includes two electrode slices, two the electrode slice extends along the length direction of aluminum pipe, two accompany two insulating pad between the electrode slice, two accompany a plurality of PTC heating chip between the insulating pad, two insulating pad and each PTC heating chip all set up along the direction of two electrode slices of perpendicular to, one side butt shutoff aluminum pipe open-ended plug that one of them insulating pad deviates from PTC heating chip, two the electrode tip of electrode slice all stretches out the plug.

Preferably, the PTC air heater further comprises a bus board, a first positive terminal and a first negative terminal are arranged on the bus board, a positive electrode of the temperature sensor is electrically connected with the first positive terminal, a negative electrode of the temperature sensor is electrically connected with the first negative terminal, a second positive terminal, a third positive terminal and a second negative terminal are further arranged on the bus board, a positive electrode tip extending out of a part of the aluminum pipe is electrically connected with the second positive terminal, a positive electrode tip extending out of another part of the aluminum pipe is electrically connected with the third positive terminal, negative electrode tips extending out of each aluminum pipe are electrically connected with the second negative terminal, and the first positive terminal, the first negative terminal, the second positive terminal, the third positive terminal and the second negative terminal are electrically connected with the controller.

Preferably, the PTC heating units are uniformly spaced apart from each other.

The utility model discloses following beneficial effect has:

the utility model provides a PTC air heater fixes PTC heating element department with temperature sensor, has reduced temperature sensor's measuring error for the controller accuse temperature is more accurate, has realized vehicle air conditioner temperature regulation optimization.

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 a schematic view of a heat dissipation strip according to an embodiment of the present invention;

fig. 2 is a schematic view of a PTC air heater according to an embodiment of the present invention;

fig. 3 is an exploded view of a PTC heating unit according to an embodiment of the present invention.

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 in 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.

As shown in fig. 1-3, the embodiment of the utility model provides a PTC air heater, including casing 1, controller 2 and temperature sensor 3, controller 2 install in on casing 1's the surface, be equipped with a plurality of PTC heating unit 4 in casing 1, each PTC heating unit 4 even interval distribution, adjacent two be equipped with a heat dissipation strip 5 between PTC heating unit 4, temperature sensor 3 installs on one of them heat dissipation strip 5, temperature sensor 3 is located between two corresponding PTC heating unit 4, temperature sensor 3 electrical connection director 2. The utility model provides a PTC air heater is fixed temperature sensor 3 to PTC heating element 4 departments, has reduced temperature sensor 3's measuring error for 2 accuse temperature of controller are more accurate, have realized vehicle air conditioner temperature regulation optimization.

Fixing mode of the temperature sensor: be equipped with a mounting panel 6 on temperature sensor 3's the shell, set up the first mounting hole 8 of installation self-tapping screw 12 on the mounting panel 6, the top of heat dissipation strip 5 is equipped with kink 9, set up the third mounting hole 11 that supplies the second mounting hole 10 that temperature sensor 3 runs through and installation self-tapping screw on the kink 9, third mounting hole 11 is the hole of boring out that is slightly littleer than self-tapping screw 12 diameter, and mounting panel 6 locks at third mounting hole 11 through self-tapping screw 12, and mounting panel 6 surface formation packing force can be hugged closely on final self-tapping screw 12 surface, mounting panel 6 through self-tapping screw 12 with kink 9 fixed connection, mounting panel 6 is located kink 9 top. The housing of the heat dissipation strip and the temperature sensor can be customized in a factory. The heat-dissipating strip of fig. 1 is rotated 90 ° and placed between the two PTC heating units of fig. 2.

In this embodiment, each of the PTC heating units 4 includes an aluminum tube 13, a PTC heating substrate is disposed in the aluminum tube, the outer surface of the PTC heating substrate contacting the aluminum tube is coated with a polyimide film, the polyimide film is insulating and thermally conductive, so that the external aluminum tube does not get an electric shock when touched, the PTC heating substrate includes a first electrode plate 14 and a second electrode plate 15, the two electrode plates extend along the length direction of the aluminum tube 13, two insulating spacers 16 are sandwiched between the two electrode plates, eight PTC heating chips 17 are sandwiched between the two insulating spacers 16, the PTC heating chips are connected in parallel, each PTC heating chip is provided with an insulating material along the edges of the two ends of the aluminum tube in the length direction, the two insulating spacers 16 and each PTC heating chip 17 are disposed along the direction perpendicular to the two electrode plates, and the insulating spacers 16 can fill redundant space in the aluminum tube, make PTC heating chip 17 in the aluminum tube not take place to rock, one of them insulating pad 16 deviates from PTC heating chip 17 one side butt shutoff aluminum pipe open-ended plug 18, two the plug 18 is all stretched out to the electrode tip of electrode slice, and electrode slice and electrode tip are integrative, and the electrode tip is that the electrode slice wears out that part of plug.

The PTC air heater further comprises a bus board, wherein a first positive terminal and a first negative terminal are arranged on the bus board, a positive electrode of the temperature sensor 3 is electrically connected with the first positive terminal, a negative electrode of the temperature sensor 3 is electrically connected with the first negative terminal, a second positive terminal, a third positive terminal and a second negative terminal are further arranged on the bus board, a positive electrode tip extending out of a part of aluminum pipe 13 is electrically connected with the second positive terminal, a positive electrode tip extending out of the other part of aluminum pipe 13 is electrically connected with the third positive terminal, each negative electrode tip extending out of the aluminum pipe 13 is electrically connected with the second negative terminal, and the first positive terminal, the first negative terminal, the second positive terminal, the third positive terminal and the second negative terminal are electrically connected with the controller. All the electrodes of the aluminum pipe 13 are integrated by welding a circuit board (bus board), the control panel is butted with the bus board through the inserting piece, so that the heating of the whole heating core body is controlled, the second positive terminal, the second negative terminal and the controller form a control loop, the third positive terminal, the second negative terminal and the controller form a control loop, and the two control loops represent two-gear temperature control loops of the PTC air heater.

Most wind heater all is equipped with heat dissipation strip 5, the utility model discloses utilize the special construction of sensor housing and heat dissipation strip, fix temperature sensor 3 on heat dissipation strip 5 through self-tapping screw 12 to it is fixed to realize air outlet temperature sensor.

The utility model discloses take and install the measure on the heat dissipation strip of heating core with temperature sensor, fix the sensor on the heat dissipation strip through the hole structure and the self-tapping screw of heat dissipation strip and sensor.

As shown in fig. 1, the present embodiment provides a structure for accurately detecting surface temperature of a PTC air heater, which includes a heat dissipation strip, wherein a second mounting hole 10 and a third mounting hole 11 are formed in the heat dissipation strip, a temperature sensor is placed in the second mounting hole, and the heat dissipation strip is connected and locked with the temperature sensor 3 through a tapping screw 12, so as to fix the sensor and accurately detect the temperature of the PTC air heater.

As shown in fig. 2, the heat dissipation strip in fig. 1 can be applied to the heating core of the PTC air heater, so that the measurement value of the temperature sensor is closer to the actual air outlet plugging, the control strategy can accurately control the outlet air temperature, and the outlet air temperature can be accurately controlled.

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

1. A PTC air heater is characterized in that: the temperature sensor is arranged on one of the heat dissipation strips, the temperature sensor is located between the two corresponding PTC heating units, and the temperature sensor is electrically connected with the controller.

2. A PTC air heater as claimed in claim 1, wherein: the top of heat dissipation strip is equipped with the kink, temperature sensor installs on the kink.

3. A PTC air heater as claimed in claim 2, wherein: the temperature sensor is characterized in that a mounting plate is arranged on a shell of the temperature sensor and fixedly connected with the bent part through screws, the mounting plate is located above the bent part, and the temperature sensor penetrates through the bent part.

4. A PTC air heater as claimed in claim 1, wherein: each PTC heating element all includes an aluminum pipe, all be equipped with PTC heating base member in the aluminum pipe, PTC heating base member and aluminum pipe contact's surface cladding has the polyimide film, PTC heating base member includes two electrode slices, two the electrode slice extends along the length direction of aluminum pipe, two accompany two insulating pad between the electrode slice, two accompany a plurality of PTC heating chip between the insulating pad, two insulating pad and each PTC heating chip all sets up along the direction of two electrode slices of perpendicular to, and one side butt shutoff aluminum pipe open-ended plug that one of them insulating pad deviates from PTC heating chip, two the plug is all stretched out to the electrode tip of electrode slice.

5. A PTC air heater according to claim 4, wherein: still include the cylinder manifold, be equipped with first positive terminal and first negative terminal on the cylinder manifold, first positive terminal is connected to temperature sensor's positive pole electricity, first negative terminal is connected to temperature sensor's negative pole electricity, still be equipped with second positive terminal, third positive terminal and second negative terminal on the cylinder manifold, positive electrode tip that partly aluminum pipe stretches out is connected with the second positive terminal electricity, and positive electrode tip that partly aluminum pipe stretches out is connected with the third positive terminal electricity in addition, each negative electrode tip that the aluminum pipe stretches out all is connected with the second negative terminal electricity, first positive terminal, first negative terminal, second positive terminal, third positive terminal and second negative terminal all are connected with the controller electricity.

6. A PTC air heater as claimed in claim 1, wherein: the PTC heating units are uniformly distributed at intervals.