Thick film high-pressure liquid heating device and corresponding automotive compressor

Abstract

This invention provides a thick-film high-pressure liquid heating device, which includes a die-cast aluminum flow channel assembly, a thick-film heating plate, an end cap, and a manifold. The upper end of the die-cast aluminum flow channel assembly is provided with a receiving groove, and the flow channel is located at the bottom of the receiving groove for conveying high-pressure liquid. The thick-film heating plate is disposed inside the receiving groove, located at the upper end of the flow channel. The thick-film heating plate is connected to the die-cast aluminum flow channel assembly and is used to heat the high-pressure liquid. The thick-film heating plate includes a fuse located in the middle of the heating plate, which is used to melt and disconnect when its temperature exceeds a set temperature. The end cap is located at the opening of the receiving groove and is connected to the die-cast aluminum flow channel assembly. The manifold is electrically connected to the thick-film heating plate and is used to electrically connect the thick-film heating plate to an external power supply device.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a thick-film high-pressure liquid heating device and a corresponding automotive compressor. Background Technology

[0002] In modern society, automotive compressors are equipped with high-pressure liquid heating devices to heat high-pressure liquids. However, when the temperature is too high, the heating device is prone to dry burning, which can lead to electrical leakage. Therefore, existing high-pressure liquid heating devices have a technical problem of low safety.

[0003] Therefore, there is a need to provide a thick-film high-pressure liquid heating device and a corresponding automotive compressor to solve the above-mentioned technical problems. Utility Model Content

[0004] This invention provides a thick-film high-pressure liquid heating device and a corresponding automotive compressor, which effectively solves the technical problem of low safety in existing high-pressure liquid heating devices.

[0005] This utility model provides a thick-film high-pressure liquid heating device, which includes, A die-cast aluminum flow channel assembly has a receiving groove at its upper end. The die-cast aluminum flow channel assembly includes a flow channel, which is disposed at the bottom of the receiving groove and is used to transport high-pressure liquid. A thick film heating plate is disposed inside the receiving groove, located at the upper end of the flow channel, and connected to the die-cast aluminum flow channel assembly. The thick film heating plate is used to heat high-pressure liquid. The thick film heating plate includes a fuse, which is disposed in the middle of the thick film heating plate. The fuse is used to perform a melting operation when its temperature exceeds the set temperature. An end cap is disposed at the opening of the receiving groove and connected to the die-cast aluminum flow channel assembly; The busbar is electrically connected to the thick film heating plate and is used to electrically connect the thick film heating plate to an external power supply device.

[0006] Furthermore, the thick film heating plate includes, A stainless steel plate is disposed at the upper end of the flow channel and connected to the flow channel; An insulating layer is disposed at the upper end of the stainless steel plate and connected to the stainless steel plate, and is used to insulate the flow channel from the resistive layer and the conductor layer; The resistive layer is disposed on the upper end of the insulating layer and connected to the insulating layer, and is used to generate heat; The conductor layer is disposed on the upper end of the insulating layer and connected to the insulating layer. The conductor layer is disposed along the circumference of the resistive layer and is used to conduct electricity to the resistive layer. An encapsulation layer, the lower end of which is connected to the resistive layer and the conductor layer, and the upper end of which is connected to the end cap, is used to seal the resistive layer and the conductor layer.

[0007] Furthermore, the fuse is disposed in the middle of the resistor layer, and the fuse is connected in series with the resistor layer.

[0008] Furthermore, the thick-film high-pressure liquid heating device includes a sealing ring, which is arranged circumferentially along the flow channel. The sealing ring is connected to the die-cast aluminum flow channel assembly and is used to seal the flow channel circumferentially.

[0009] Furthermore, the die-cast aluminum flow channel assembly includes an annular groove located at the bottom of the receiving groove, the annular groove being arranged circumferentially along the flow channel, and the sealing ring being connected to the interior of the annular groove.

[0010] Furthermore, the flow channel includes an inlet and an outlet. The inlet is located at one end of the length direction of the die-cast aluminum flow channel assembly, and the outlet is located at the other end of the length direction of the die-cast aluminum flow channel assembly. The inlet and the outlet are arranged along the diagonal of the die-cast aluminum flow channel assembly. The flow channel includes multiple straight flow channels and multiple curved flow channels. The curved flow channels connect the ends of two adjacent straight flow channels. The inlet is connected to the corresponding straight flow channel, and the outlet is connected to the corresponding straight flow channel.

[0011] Furthermore, the die-cast aluminum flow channel assembly includes two NTC mounting holes, which are located at the bottom of the flow channel. The two NTC mounting holes are respectively located on the liquid inlet and the corresponding straight flow channel, and on the liquid outlet and the corresponding straight flow channel. The two NTC mounting holes are used to detect the temperature of the high-pressure liquid.

[0012] Furthermore, the fuse is a thermal fuse.

[0013] Furthermore, the thick-film high-pressure liquid heating device also includes a sealing gasket, which is disposed inside the receiving groove and located at the upper end of the flow channel. The sealing gasket is connected to the die-cast aluminum flow channel assembly and is used to seal the flow channel in the vertical direction.

[0014] An automotive compressor comprising any of the thick-film high-pressure liquid heating devices described above.

[0015] Compared to existing technologies, this invention offers the following advantages: It provides a thick-film high-pressure liquid heating device equipped with a fuse. The fuse is used to melt when the temperature exceeds a set temperature. Therefore, when the fuse's temperature exceeds the set temperature, it will melt first, disconnecting the power supply circuit and stopping the thick-film high-pressure liquid heating device from heating. This prevents the thick-film high-pressure liquid heating device from dry-burning. Furthermore, the fuse's melting operation effectively ensures the insulation performance of the equipment, preventing leakage. Therefore, the thick-film high-pressure liquid heating device of this invention is safer for users. This thick-film high-pressure liquid heating device effectively solves the technical problem of low safety in existing high-pressure liquid heating devices. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0017] Figure 1 This is one of the structural diagrams of an embodiment of the thick-film high-pressure liquid heating device of this utility model.

[0018] Figure 2 This is the second structural diagram of an embodiment of the thick-film high-pressure liquid heating device of this utility model.

[0019] Figure 3 This is an exploded view of an embodiment of the thick-film high-pressure liquid heating device of this utility model.

[0020] Figure 4 This is an exploded view of the thick film heating plate of an embodiment of the thick film high-pressure liquid heating device of this utility model.

[0021] Figure 5 This is one of the internal structural diagrams of an embodiment of the thick-film high-pressure liquid heating device of this utility model.

[0022] Figure 6 This is the second internal structural diagram of an embodiment of the thick-film high-pressure liquid heating device of this utility model.

[0023] In the diagram, 10 is a thick-film high-pressure liquid heating device; 11 is a die-cast aluminum flow channel assembly; 111 is a receiving tank; 112 is a flow channel; 1121 is a straight flow channel; 1122 is a curved flow channel; 113 is an inlet; 114 is an outlet; 115 is an NTC mounting hole; 116 is an annular groove; 12 is a thick-film heating plate; 121 is a stainless steel plate; 122 is an insulating layer; 123 is a resistance layer; 1231 is a fuse; 124 is a conductor layer; 125 is an encapsulation layer; 13 is an end cap; 14 is a busbar; 15 is a sealing ring; and 16 is a sealing gasket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0026] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0027] In the diagram, units with similar structures are represented by the same labels.

[0028] Please refer to Figure 1 , Figure 3 and Figure 6This invention provides a thick-film high-pressure liquid heating device 10, which includes a die-cast aluminum flow channel assembly 11, a thick-film heating plate 12, an end cap 13, and a manifold 14. The upper end of the die-cast aluminum flow channel assembly 11 is provided with a receiving groove 111, and the die-cast aluminum flow channel assembly 11 includes a flow channel 112, which is located at the bottom of the receiving groove 111 and is used to transport high-pressure liquid. The thick-film heating plate 12 is disposed inside the receiving groove 111, located at the upper end of the flow channel 112. The thick-film heating plate 12 is connected to the die-cast aluminum flow channel assembly 11, and the thick-film heating plate 12 is fixedly connected to the die-cast aluminum flow channel assembly 11 by screws. Therefore, the connection between the thick-film heating plate 12 and the die-cast aluminum flow channel assembly 11 is relatively stable. Moreover, the user can easily install and remove the thick-film heating plate 12 from the die-cast aluminum flow channel assembly 11. The thick-film heating plate 12 is used to heat high-pressure liquids. The thick-film heating plate 12 includes a fuse 1231, which can be a thermal fuse. The fuse 1231 is located in the middle of the thick-film heating plate 12 and is used to melt when its temperature exceeds a set temperature. That is, in abnormal conditions, if the temperature of the fuse 1231 exceeds the highest temperature of other areas of the thick-film heating plate 12, the fuse 1231 will melt first.

[0029] Therefore, when the temperature of fuse 1231 exceeds the set temperature, fuse 1231 will melt first, disconnecting the power supply circuit and causing the thick-film high-pressure liquid heating device 10 to stop heating. This prevents the thick-film high-pressure liquid heating device 10 from dry burning. Furthermore, the melting operation of fuse 1231 effectively protects the insulation performance of the equipment, preventing leakage. Therefore, the thick-film high-pressure liquid heating device 10 of this invention is safer for users. This thick-film high-pressure liquid heating device 10 effectively solves the technical problem of low safety in existing high-pressure liquid heating devices.

[0030] In existing high-pressure liquid heating devices, the temperature of the thick-film heating plate rises extremely rapidly when dry-burning. If the electrical dry-burning protection fails, it can cause large-area melting of the thick-film heating circuit, easily leading to insulation failure and leakage. However, in the thick-film high-pressure liquid heating device 10 of this invention, the fuse 1231 is made of a special material. Under abnormal conditions, the temperature rise rate at this point exceeds that of other areas, causing it to melt first. Moreover, the melting point of fuse 1231 is lower than the temperature at which the insulation layer 122 is damaged. Therefore, the melting of fuse 1231 will not cause insulation failure.

[0031] Please refer to Figure 3 , Figure 5 and Figure 6An end cap 13 is disposed at the opening of the receiving groove 111 and is connected to the die-cast aluminum flow channel assembly 11. Furthermore, the end cap 13 is fixedly connected to the die-cast aluminum flow channel assembly 11 by screws. Therefore, the connection between the end cap 13 and the die-cast aluminum flow channel assembly 11 is relatively stable. Moreover, the user can easily install and remove the end cap 13 from the die-cast aluminum flow channel assembly 11. A busbar 14 is electrically connected to the thick-film heating plate 12 and is used to electrically connect the thick-film heating plate 12 to an external power supply device.

[0032] Please refer to Figure 1 , Figure 4 and Figure 6 The thick-film heating plate 12 includes a stainless steel plate 121, an insulating layer 122, a resistive layer 123, a conductor layer 124, and an encapsulation layer 125. The stainless steel plate 121 is disposed at the upper end of the flow channel 112 and is connected to the flow channel 112. The insulating layer 122 is disposed at the upper end of the stainless steel plate 121 and is connected to the stainless steel plate 121. The insulating layer 122 insulates the flow channel 112 from the resistive layer 123 and the conductor layer 124. The resistive layer 123 is disposed at the upper end of the insulating layer 122 and is connected to the insulating layer 122. The resistive layer 123 generates heat, which can be used to heat the high-pressure liquid. Furthermore, a fuse 1231 can be disposed in the middle of the resistive layer 123 and is connected in series with the resistive layer 123. A conductor layer 124 is disposed on the upper end of the insulating layer 122 and is connected to the insulating layer 122. The conductor layer 124 is disposed circumferentially along the resistive layer 123 and is used to conduct electricity to the resistive layer 123. The lower end of the encapsulation layer 125 is connected to the resistive layer 123 and the conductor layer 124, and the upper end of the encapsulation layer 125 is connected to the end cap 13. The encapsulation layer 125 is used to seal the resistive layer 123 and the conductor layer 124.

[0033] Please refer to Figure 3 and Figure 5 The thick-film high-pressure liquid heating device 10 includes a sealing ring 15. The sealing ring 15 is arranged circumferentially along the flow channel 112. The sealing ring 15 is connected to the die-cast aluminum flow channel assembly 11. The sealing ring 15 is used to seal the flow channel 112 circumferentially, thereby preventing high-pressure liquid from overflowing from the flow channel 112. The die-cast aluminum flow channel assembly 11 includes an annular groove 116, located at the bottom of the receiving groove 111, arranged circumferentially along the flow channel 112, and the sealing ring 15 is connected inside the annular groove 116. Because the sealing ring 15 is connected inside the annular groove 116, the connection between the sealing ring 15 and the die-cast aluminum flow channel assembly 11 is relatively stable. Even with prolonged use of the thick-film high-pressure liquid heating device 10, the sealing ring 15 will not loosen.

[0034] Please refer to Figure 1 and Figure 6 The flow channel 112 includes an inlet 113 and an outlet 114. The inlet 113 is located at one end of the die-cast aluminum flow channel assembly 11 along its length. The outlet 114 is located at the other end of the die-cast aluminum flow channel assembly 11 along its length. The inlet 113 and outlet 114 are arranged diagonally along the die-cast aluminum flow channel assembly 11. The inlet 113 and outlet 114 can be integrally formed with the die-cast aluminum flow channel assembly 11 by die casting. Moreover, the shape of the die-cast aluminum flow channel assembly 11 can be precision machined by CNC, thereby effectively reducing the cost of die-cast parts. The flow channel 112 includes multiple straight flow channels 1121 and multiple curved flow channels 1122. The curved flow channels 1122 connect the ends of two adjacent straight flow channels 1121. The inlet 113 communicates with the corresponding straight flow channel 1121, and the outlet 114 communicates with the corresponding straight flow channel 1121. Therefore, even if the area of ​​the die-cast aluminum flow channel assembly 11 is relatively limited, the die-cast aluminum flow channel assembly 11 can be provided with a longer flow channel 112, so that the high-pressure liquid is fully heated in the longer flow channel 112.

[0035] Please refer to Figure 2 The die-cast aluminum flow channel assembly 11 includes two NTC mounting holes 115, which are located at the bottom of the flow channel 112. The two NTC mounting holes 115 are respectively located on the inlet 113 and the corresponding straight flow channel 1121, and on the outlet 114 and the corresponding straight flow channel 1121. The two NTC mounting holes 115 are used to detect the temperature of the high-pressure liquid. The thick-film high-pressure liquid heating device 10 also includes a sealing gasket 16, which is located inside the receiving groove 111 and at the upper end of the flow channel 112. The sealing gasket 16 is connected to the die-cast aluminum flow channel assembly 11. The sealing gasket 16 is used to seal the flow channel 112 in the vertical direction, effectively preventing the high-pressure liquid in the flow channel 112 from overflowing.

[0036] In current applications of thermal management in the new energy field, the compressor and high-pressure liquid heater are two separate components, resulting in high cost and heavy weight, which does not meet the current requirements for cost reduction and weight reduction in vehicle applications. However, this invention utilizes the unique structural advantages of thick-film heating. Through a flat thick-film heating plate 12 structure, the high-pressure liquid heating part can be integrated into the compressor. Furthermore, the heating device and compressor share the same electronic control board, achieving cost and weight reduction effects. Moreover, this invention achieves a thermal efficiency of up to 95%. Simultaneously, this invention optimizes the circuit design, ensuring that the current flowing through adjacent resistance lines flows in opposite directions, thereby canceling the magnetic field generated by the current and reducing the equivalent inductance. When the IGBT or SiC silicon carbide power module in the control circuit is turned off, the reduction in equivalent inductance effectively reduces the impact of the back electromotive force generated by the equivalent inductance on the power devices.

[0037] This utility model also provides an automotive compressor, which has a thick-film high-pressure liquid heating device 10 installed inside. The specific structure of the thick-film high-pressure liquid heating device 10 inside the automotive compressor is the same as that described above. Please refer to the detailed description of the structure of the thick-film high-pressure liquid heating device 10 above for details.

[0038] The installation process of this utility model is as follows: First, the user manufactures a receiving groove 111 on the die-cast aluminum flow channel assembly 11 using CNC machining. The user then manufactures a flow channel 112 at the bottom of the receiving groove 111. Furthermore, the user manufactures an inlet 113 at one end of the die-cast aluminum flow channel assembly 11 along its length and an outlet 114 at the other end. Next, the user manufactures two NTC mounting holes 115 at the bottom of the flow channel 112. These two NTC mounting holes 115 are used to install temperature sensors, which can be used to detect the temperature of the high-pressure liquid. The user manufactures an annular groove 116 at the bottom of the receiving groove 111, which is arranged circumferentially along the flow channel 112. Then, the user connects a sealing ring 15 to the inside of the annular groove 116. Subsequently, the user installs a sealing gasket 16 at the upper end of the flow channel 112. Finally, the user installs a thick-film heating plate 12 inside the receiving groove 111, located above the sealing gasket 16. Furthermore, the thick-film heating plate 12 is fixedly connected to the die-cast aluminum flow channel assembly 11 by screws. The thick-film heating plate 12 includes a stainless steel plate 121, an insulating layer 122, a resistive layer 123, a conductor layer 124, and an encapsulation layer 125. The stainless steel plate 121 is connected to the upper end of the flow channel 112, and the insulating layer 122 is connected to the upper end of the stainless steel plate 121. The resistive layer 123 and the conductor layer 124 are connected to the upper end of the insulating layer 122, with the conductor layer 124 arranged circumferentially along the resistive layer 123. The encapsulation layer 125 is connected to the upper ends of the resistive layer 123 and the conductor layer 124. The thick-film heating plate 12 includes a fuse 1231, which is connected to the middle of the resistive layer 123. The fuse 1231 is used to melt and disconnect when the temperature exceeds a set temperature. Subsequently, the user electrically connects the busbar 14 to the thick-film heating plate 12. The user then places the end cap 13 into the opening of the receiving groove 111, and the end cap 13 is fixedly connected to the die-cast aluminum flow channel assembly 11 by screws. Thus, the user can complete the installation of the thick-film high-pressure liquid heating device 10.

[0039] This invention provides a thick-film high-pressure liquid heating device, which includes a fuse that melts when its temperature exceeds a set temperature. Therefore, when the fuse's temperature exceeds the set temperature, it will melt first, disconnecting the power supply circuit and stopping the thick-film high-pressure liquid heating device from heating. This prevents the thick-film high-pressure liquid heating device from dry burning. Furthermore, the fuse's melting operation effectively protects the equipment's insulation performance, preventing leakage. Therefore, the thick-film high-pressure liquid heating device of this invention is safer for users. This thick-film high-pressure liquid heating device effectively solves the technical problem of low safety in existing high-pressure liquid heating devices.

[0040] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A thick-film high-pressure liquid heating device, characterized by It includes A die-cast aluminum flow channel assembly has a receiving groove at its upper end. The die-cast aluminum flow channel assembly includes a flow channel, which is disposed at the bottom of the receiving groove and is used to transport high-pressure liquid. A thick film heating plate is disposed inside the receiving groove, located at the upper end of the flow channel, and connected to the die-cast aluminum flow channel assembly. The thick film heating plate is used to heat high-pressure liquid. The thick film heating plate includes a fuse, which is disposed in the middle of the thick film heating plate. The fuse is used to perform a melting operation when its temperature exceeds the set temperature. An end cap is disposed at the opening of the receiving groove and connected to the die-cast aluminum flow channel assembly; The busbar is electrically connected to the thick film heating plate and is used to electrically connect the thick film heating plate to an external power supply device.

2. The thick film high pressure liquid heating device of claim 1, wherein, The thick film heating plate includes, A stainless steel plate is disposed at the upper end of the flow channel and connected to the flow channel; An insulating layer is disposed at the upper end of the stainless steel plate and connected to the stainless steel plate, and is used to insulate the flow channel from the resistive layer and the conductor layer; The resistive layer is disposed on the upper end of the insulating layer and connected to the insulating layer, and is used to generate heat; The conductor layer is disposed on the upper end of the insulating layer and connected to the insulating layer. The conductor layer is disposed along the circumference of the resistive layer and is used to conduct electricity to the resistive layer. An encapsulation layer, the lower end of which is connected to the resistive layer and the conductor layer, and the upper end of which is connected to the end cap, is used to seal the resistive layer and the conductor layer.

3. The thick-film high-pressure liquid heating device according to claim 2, characterized in that, The fuse is located in the middle of the resistor layer and is connected in series with the resistor layer.

4. The thick-film high-pressure liquid heating device according to claim 1, characterized in that, The thick-film high-pressure liquid heating device includes a sealing ring, which is arranged circumferentially along the flow channel. The sealing ring is connected to the die-cast aluminum flow channel assembly and is used to seal the flow channel circumferentially.

5. The thick-film high-pressure liquid heating device according to claim 4, characterized in that, The die-cast aluminum flow channel assembly includes an annular groove located at the bottom of the receiving groove and arranged circumferentially along the flow channel. The sealing ring is connected to the interior of the annular groove.

6. The thick-film high-pressure liquid heating device according to claim 1, characterized in that, The flow channel includes an inlet and an outlet. The inlet is located at one end of the length direction of the die-cast aluminum flow channel assembly, and the outlet is located at the other end of the length direction of the die-cast aluminum flow channel assembly. The inlet and the outlet are arranged along the diagonal of the die-cast aluminum flow channel assembly. The flow channel includes multiple straight flow channels and multiple curved flow channels. The curved flow channels connect the ends of two adjacent straight flow channels. The inlet is connected to the corresponding straight flow channel, and the outlet is connected to the corresponding straight flow channel.

7. The thick-film high-pressure liquid heating device according to claim 6, characterized in that, The die-cast aluminum flow channel assembly includes two NTC mounting holes, which are located at the bottom of the flow channel. The two NTC mounting holes are respectively located on the liquid inlet and the corresponding straight flow channel, and on the liquid outlet and the corresponding straight flow channel. The two NTC mounting holes are used to detect the temperature of the high-pressure liquid.

8. The thick-film high-pressure liquid heating device according to claim 1, characterized in that, The fuse is a thermal fuse.

9. The thick-film high-pressure liquid heating device according to claim 1, characterized in that, The thick-film high-pressure liquid heating device also includes a sealing gasket, which is disposed inside the receiving groove and located at the upper end of the flow channel. The sealing gasket is connected to the die-cast aluminum flow channel assembly and is used to seal the flow channel in the vertical direction.

10. An automotive compressor, characterized in that, It includes the thick-film high-pressure liquid heating device according to any one of claims 1-9.

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