PTC air heater

Abstract

The invention relates to the technical field of temperature control. More specifically, the invention relates to a PTC air heater, comprising a heating module, an electric control board, a temperature control module, a temperature control module and a temperature control module, the negative copper bus bar is connected with the electric control board; the positive electrode copper bus bar is connected with the electric control board; the contact pin is connected with the electric control board; the positive electrodes of the two power interfaces are respectively connected with the positive electrode copper bus bar, and the negative electrodes of the two power interfaces are respectively connected with the negative electrode copper bus bar; and the communication interface is connected with the contact pin. The invention provides a PTC heating module and a PTC wind heater having the same, which can realize high power at low voltage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature control. More particularly, the present application relates to a PTC air heater. BACKGROUND

[0002] New energy vehicles are the direction of future global vehicle development, and are also the direction of policy support in China. Since new energy vehicles do not have engines, vehicle heating becomes a problem, and additional heating equipment needs to be added. The electric heating function of the PTC air heater exactly meets this function. The PTC air heater is a heating device, and its core function is based on the self-limiting temperature characteristics of PTC ceramic materials, combined with forced convection by a fan, to achieve rapid and stable heating effect.

[0003] The main core parameters of the PTC air heater include rated voltage, rated power and working range, which together determine the performance and application scenarios of the PTC air heater. Among them, the rated voltage and rated power determine the performance of the PTC air heater. The existing rated voltage of the PTC air heater is 12V / 13.5V, and the highest rated power commonly seen on the market is 1000w. For new energy vehicles, the rated power is not enough, and it is difficult to meet the heating needs of new energy vehicles. SUMMARY

[0004] The purpose of the present application is to provide a PTC air heater that can achieve high power at low voltage.

[0005] In order to achieve these objects and other advantages in accordance with the present application, a PTC air heater is provided, comprising:

[0006] a heating module:

[0007] an electric control board connected to the heating module;

[0008] a negative bus copper bar connected to the electric control board;

[0009] a positive bus copper bar connected to the electric control board;

[0010] a pin connected to the electric control board;

[0011] two power interfaces, the positive poles of which are respectively connected to the positive bus copper bar, and the negative poles of which are respectively connected to the negative bus copper bar;

[0012] a communication interface connected to the pin.

[0013] Further, the PTC air heater comprises:

[0014] The first heat dissipation strip is configured in multiple and spaced apart, with a fixing groove formed between two adjacent first heat dissipation strips;

[0015] The second heat sink is connected to one end of the first heat sink, except for the two sides.

[0016] The PTC heating unit is provided in each of the fixing slots. The PTC heating unit abuts against the first heat dissipation strips on both sides, and one end of its electrode plate extends out of the fixing slot and is connected to the electronic control board.

[0017] Furthermore, in the aforementioned PTC air heater, the PTC heating unit includes:

[0018] An aluminum tube, with its two sides respectively abutting against the first heat sink strip;

[0019] A plastic frame is embedded in the aluminum tube;

[0020] The electrode sheet is fixed in the aluminum tube by the plastic frame, and one end of the electrode sheet extends out of the aluminum tube.

[0021] Multiple heating chips are fixed on the plastic frame and attached to one side of the electrode sheet;

[0022] An insulating film is attached to the other side of the electrode sheet.

[0023] Furthermore, in the aforementioned PTC air heater, a first mounting groove is provided on one side of the plastic frame, and a plurality of second mounting grooves, all of which are connected to the first mounting groove, are provided on the other side. The electrode sheet is embedded in the first mounting groove, and the plurality of heating chips are respectively embedded in the plurality of second mounting grooves.

[0024] Furthermore, the aforementioned PTC air heater also includes:

[0025] A heat sink is disposed between the electronic control board and the PTC heating module. The electrode sheet passes through the heat sink, and the negative electrode busbar and the second heat sink are both connected to the heat sink.

[0026] Furthermore, in the PTC air heater, the heat sink has multiple protrusions on the side near the electronic control board and multiple heat dissipation fins on the side near the PTC heating module.

[0027] Furthermore, in the PTC air heater, the heat sink plate is provided with multiple connecting blocks on the side near the PTC heating module, and the multiple second heat sink strips are respectively connected to the multiple connecting blocks.

[0028] Furthermore, the aforementioned PTC air heater also includes:

[0029] The outer casing has a hollow center, and the PTC heating module is installed in the hollow center of the outer casing.

[0030] The control box is detachably connected to one end of the outer casing. The electronic control board, negative busbar, and positive busbar are all housed inside the control box. The electronic control board and heat sink are fixedly connected to the control box. The power interface and communication interface pass through the control box and are connected to it. The heat sink fins and connecting blocks extend out of the control box. The outer casing is provided with receiving slots corresponding to the heat sink fins and connecting blocks.

[0031] Furthermore, in the aforementioned PTC air heater, the control box has two U-shaped parts on the side near the outer casing. The two U-shaped parts form a mounting opening corresponding to one end of the outer casing. One end of the outer casing extends into the mounting opening. The outer casing has two buckles on one end, and the U-shaped parts have corresponding fastening positions.

[0032] Furthermore, in the aforementioned PTC air heater, the outer casing is provided with multiple holes for reducing ventilation resistance.

[0033] The beneficial effects of this invention are:

[0034] 1. The PTC air heater of the present invention is designed with two power supply plugs. It can be selected to use one power interface alone or both power interfaces at the same time as needed to achieve high power under low voltage.

[0035] 2. The PTC air heater of the present invention dissipates heat from the control box by setting heat sinks. The heat dissipated by the heat sinks also serves as a supplement to the PTC heating module, thereby improving the heating effect of the PTC air heater while ensuring its normal operation.

[0036] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a PTC heating module in one embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of a PTC heating unit in one embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the connection between the plastic frame and the electrode sheet in one embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram showing the connection between the plastic frame and the heating chip in one embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of a PTC air heater in another embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the structure of a PTC air heater in another embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the heat sink structure in another embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the structure of a PTC air heater in another embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the outer casing of the present invention;

[0046] Figure 10 This is a schematic diagram of the control box described in this invention;

[0047] The reference numerals in the attached figures are as follows:

[0048] 1. PTC heating module; 11. First heat sink; 12. Second heat sink; 13. PTC heating unit; 131. Aluminum tube; 132. Plastic frame; 133. Electrode sheet; 134. Heating chip; 135. Insulating film; 136. Positioning part; 2. Control board; 21. Negative busbar; 22. Positive busbar; 23. Pin; 3. Power interface; 4. Communication interface; 5. Heat sink; 51. Boss; 52. Heat sink fins; 53. Connecting block; 6. Housing; 61. Hole; 62. Receiving groove; 63. Buckle; 7. Control box; 71. U-shaped part; 72. Cover plate. Detailed Implementation

[0049] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0050] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] like Figure 1 As shown, an embodiment of the present invention provides a PTC heating module, comprising:

[0053] The first heat dissipation strip 11 is configured in multiple and spaced apart, and a fixing groove is formed between two adjacent first heat dissipation strips 11;

[0054] The second heat sink 12 is connected to one end of the first heat sink 11 except for the two sides;

[0055] PTC heating unit 13, each of the fixing slots is provided with PTC heating unit 13, the PTC heating unit 13 abuts against the first heat dissipation strips 11 on both sides, and one end of its electrode plate 133 extends out of the fixing slot.

[0056] In this embodiment, the PTC heating unit, the first heat sink 11, and the second heat sink 12 are bonded together with a high-temperature curing conductive adhesive. The first heat sink 11 on both sides of the PTC heating unit 13 dissipates heat during operation. Simultaneously, second heat sink 12 are connected to several of the middle first heat sink 11. The second heat sink 12 enhances the heat dissipation effect of the first heat sink 11. Furthermore, when the PTC heating module 1 is installed and used, the second heat sink 12 can serve as a connecting part to fix the PTC heating module 1.

[0057] Preferably, as another embodiment of the present invention, in Figure 1 Based on the illustrated embodiment, it also includes:

[0058] like Figures 2-4 As shown, the PTC heating unit 13 includes:

[0059] Aluminum tube 131, with its two sides respectively abutting against the first heat sink 11;

[0060] A plastic frame 132 is embedded in the aluminum tube 131;

[0061] Electrode 133 is fixed in the aluminum tube 131 by the plastic frame 132, and one end of it extends out of the aluminum tube 131;

[0062] Multiple heating chips 134 are fixed on the plastic frame 132 and attached to one side of the electrode sheet 133;

[0063] An insulating film 135 is attached to the other side of the electrode sheet 133.

[0064] In this embodiment, the plastic frame 132 has a first mounting groove on one side and multiple second mounting grooves, each communicating with the first mounting groove, on the other side. Electrode pieces 133 are embedded in the first mounting groove, and multiple heating chips 134 are embedded in the multiple second mounting grooves. The aluminum tube 131 is hollow. One end of the plastic frame 132 is inserted into the aluminum tube 131 until the positioning part 136 at the other end of the plastic frame 132 contacts the aluminum tube 131. Finally, a hydraulic press is used to compact and tighten the PTC heating unit 13. One end of the electrode piece 133 is located outside the aluminum tube 131, facilitating connection of the electrode piece 133 to the control module during use of the PTC heating unit 13.

[0065] like Figures 5-7 As shown, an embodiment of the present invention also provides a PTC air heater, comprising:

[0066] PTC heating module 1;

[0067] The electronic control board 2 is connected to one end of the electrode plate 133 of the PTC heating unit 13;

[0068] The negative busbar 21 is connected to the electronic control board 2;

[0069] Positive busbar 22, which is connected to the electronic control board 2;

[0070] Pin 23 is connected to the electronic control board 2;

[0071] Two power interfaces 3, the positive terminals of which are connected to the positive busbar 22 respectively, and the negative terminals of which are connected to the negative busbar 21 respectively;

[0072] Communication interface 4 is connected to the pin 23;

[0073] The heat sink 5 is disposed between the electronic control board 2 and the PTC heating module 1. The electrode sheet 133 passes through the heat sink 5. The negative electrode busbar 21 and the second heat sink 12 are both connected to the heat sink 5.

[0074] In this embodiment, the second heat sink 12 of the PTC heating module 1 is connected to the heat sink 5 to fix the PTC heating module 1. Multiple electrode plates 133 of the PTC heating module 1 pass through the heat sink 5 and are soldered to the control board 2, thus connecting the PTC heating module 1 to the control board 2. Two protrusions extend from the negative busbar 21 and the positive busbar 22 respectively. The two protrusions of the negative busbar 21 are connected to the negative terminals of the two power interfaces 3, and the two protrusions of the positive busbar 22 are connected to the positive terminals of the two power interfaces 3, thus connecting the two power interfaces 3 to the control board 2. Furthermore, the communication interface 4 is connected to the control board 2 via pins 23. The heat sink 5 is positioned between the control board 2 and the PTC heating module 1. The side of the heat sink 5 closest to the control board 2 has multiple protrusions 51, and the side closest to the PTC heating module 1 has multiple heat dissipation fins 52, allowing for heat dissipation. In addition, the heat sink 5 has multiple connecting blocks 53 on the side near the PTC heating module 1. Multiple second heat sink strips 12 are connected to the connecting blocks 53 respectively. Holes can be drilled between the second heat sink strips 12 and the connecting blocks 53, and then bolts can be used for connection. The negative busbar 21 is connected to the heat sink 5, transferring the heat generated when energized to the heat sink 5, thus dissipating heat from the negative busbar 21. For the heat dissipation of the positive busbar 22, such as... Figure 6 As shown, the area of ​​the positive busbar 22 can be appropriately increased to improve the heat dissipation effect of the positive busbar 22.

[0075] When the PTC air heater is working, power interface 3 supplies power to the control board 2 through the negative busbar 21 and the positive busbar 22. The control board 2 then supplies power to each PTC heating unit 13. When both power interfaces 3 supply power to the control board 2 simultaneously, the supply voltage of the control board 2 is the sum of the two power interfaces 3. This allows the supply voltage of the control board 2 to be increased without increasing the input voltage of the power interfaces 3, thereby increasing the power of the PTC heating module and enabling the PTC air heater to achieve high power at low voltage.

[0076] Preferably, as another embodiment of the present invention, in Figure 1 Based on the illustrated embodiments, as Figures 8-10 As shown, it also includes:

[0077] The outer casing 6 has a hollow center, and the PTC heating module 1 is installed in the hollow center of the outer casing 6. The outer casing 6 is provided with a plurality of holes 61 for reducing ventilation resistance.

[0078] A control box 7 is detachably connected to one end of the outer casing 6. The control board 2, negative busbar 21, and positive busbar 22 are all housed within the control box 7. The control board 2 and the heat sink 5 are fixedly connected to the control box 7. The power interface 3 and the communication interface 4 pass through and are connected to the control box 7. The heat sink fins 52 and the connecting block 53 extend out of the control box 7. The outer casing 6 has receiving slots 62 corresponding to the heat sink fins 52 and the connecting block 53. The control box 7 has an opening at the end furthest from the outer casing 6 and is detachably fitted with a cover plate 72.

[0079] In this embodiment, the PTC air heater is enclosed by the outer shell 6 and the control box 7. When connecting the control box 7 and the outer shell 6, the control box 7 has two U-shaped parts 71 on the side near the outer shell 6. The two U-shaped parts 71 form a mounting opening corresponding to one end of the outer shell 6. One end of the outer shell 6 is inserted into the mounting opening, and one end of the outer shell 6 has two buckles 63. The U-shaped parts 71 have corresponding fastening positions, and the two buckles 63 are respectively fastened to the two fastening positions to realize the connection between the control box 7 and the outer shell 6.

[0080] At this time, only the two ends of the outer casing 6 are blocked by the U-shaped parts 71, while the middle part is still exposed. At this time, the heat dissipation fins 52 and the connecting block 53 are also connected to the external environment through the corresponding receiving grooves 62. At this time, the heat dissipation fins 52 and the connecting block 53 can conduct the heat of the heat dissipation plate 5 outward. The PTC air heater mainly heats the external ambient air. When it is working, the temperature of the PTC heating unit 13 in the PTC heating module 1 is about 50°C, while the temperature of the heat dissipation fins 52 and the connecting block 53 is about 70°C. It can be seen that the heat dissipation fins 52 and the connecting block 53 can also play a role in heating the air in the external environment, and can serve as a supplement to the PTC heating unit 13, thereby improving the heating effect of the PTC air heater on the external ambient air.

[0081] In addition, PTC air heaters are generally used in conjunction with fans. The fan drives the air to circulate, and the air is heated by the PTC air heater. During this process, the heat on the heat dissipation fins 52 and connecting block 53 is quickly transferred to the outside air, which also accelerates the heat dissipation effect of the heat sink 5. This ensures that the temperature inside the control box 7 does not become too high. The control board 2, negative busbar 21 and positive busbar 22 can also dissipate heat quickly, thus preventing high temperatures from affecting their normal operation.

[0082] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A PTC air heater, characterized in that, include: Heating module: An electronic control board, which is connected to the heating module; A negative busbar is connected to the electronic control board; A positive busbar is connected to the electronic control board; A pin, which connects to the electronic control board; Two power interfaces, the positive terminals of which are connected to the positive busbar and the negative terminals of which are connected to the negative busbar; A communication interface, which is connected to the pin.

2. A PTC air heater as described in claim 1, characterized in that, The PTC heating module includes: The first heat dissipation strip is configured in multiple and spaced apart, with a fixing groove formed between two adjacent first heat dissipation strips; The second heat sink is connected to one end of the first heat sink, except for the two sides. The PTC heating unit is provided in each of the fixing slots. The PTC heating unit abuts against the first heat dissipation strips on both sides, and one end of its electrode plate extends out of the fixing slot and is connected to the electronic control board.

3. A PTC air heater as described in claim 2, characterized in that, The PTC heating unit includes: An aluminum tube, with its two sides respectively abutting against the first heat sink strip; A plastic frame is embedded in the aluminum tube; The electrode sheet is fixed in the aluminum tube by the plastic frame, and one end of the electrode sheet extends out of the aluminum tube. Multiple heating chips are fixed on the plastic frame and attached to one side of the electrode sheet; An insulating film is attached to the other side of the electrode sheet.

4. A PTC air heater as described in claim 3, characterized in that, The plastic frame has a first mounting groove on one side and multiple second mounting grooves on the other side, all of which are connected to the first mounting groove. The electrode sheet is embedded in the first mounting groove, and the multiple heating chips are respectively embedded in the multiple second mounting grooves.

5. A PTC air heater as described in claim 2, characterized in that, A heat sink is disposed between the electronic control board and the PTC heating module. The electrode sheet passes through the heat sink, and the negative electrode busbar and the second heat sink are both connected to the heat sink.

6. A PTC air heater as described in claim 5, characterized in that, The heat sink has multiple protrusions on the side near the electronic control board and multiple heat dissipation fins on the side near the PTC heating module.

7. A PTC air heater as described in claim 6, characterized in that, The heat sink is provided with multiple connecting blocks on the side near the PTC heating module, and the multiple second heat sink strips are respectively connected to the multiple connecting blocks.

8. A PTC air heater as described in claim 7, characterized in that, Also includes: The outer casing has a hollow center, and the PTC heating module is installed in the hollow center of the outer casing. The control box is detachably connected to one end of the outer casing. The electronic control board, negative busbar, and positive busbar are all housed inside the control box. The electronic control board and heat sink are fixedly connected to the control box. The power interface and communication interface pass through the control box and are connected to it. The heat sink fins and connecting blocks extend out of the control box. The outer casing is provided with receiving slots corresponding to the heat sink fins and connecting blocks.

9. A PTC air heater as described in claim 8, characterized in that, The control box has two U-shaped parts on the side near the outer shell. The two U-shaped parts form a mounting opening corresponding to one end of the outer shell. One end of the outer shell extends into the mounting opening. Two buckles are provided on one end of the outer shell, and corresponding fasteners are provided on the U-shaped parts.

10. A PTC air heater as described in claim 8, characterized in that, The outer casing has multiple holes to reduce ventilation resistance.

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