High-pressure water heating PTC heater

Abstract

The application relates to a high-pressure water heating PTC heater which comprises an upper shell and a base, a cavity for placing cooling liquid is formed in the base, a cooling liquid inlet and a cooling liquid outlet are respectively arranged on the side wall of the base; a heating assembly is arranged in the upper shell, the heating assembly is a heating core inserted into the base, a heat exchange structure is arranged in the base, the heat exchange structure comprises a partition plate and a flow-around plate, the partition plate is fixed in the base, and the flow-around plate is fixed on the side wall of the partition plate and is arranged in a bent shape. The partition plate arranged in the base can separate the base area on one hand, so that the cooling liquid entering the base can be distributed to both sides of the partition plate, so that the heating effect of the heating core on the cooling liquid is more uniform; on the other hand, the partition plate supports the flow-around plate, the flow-around plate prolongs the flow path of the cooling liquid, so that sufficient heat exchange is realized, and the overall heat exchange efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of PTC heater technology, and in particular to a high-pressure water heating PTC heater. Background Technology

[0002] PTC water heaters are electric heating devices widely used in vehicle heating systems. Their main working principle is to use PTC (positive temperature coefficient) ceramic elements as the heating core, converting electrical energy into heat energy to heat the coolant flowing through the water tank. The circulating water pump drives the coolant to absorb heat and then deliver it to the heater core or heat dissipation terminal to achieve heating. In high-pressure water heating systems, higher requirements are placed on the heat exchange efficiency of the heater.

[0003] Existing PTC heaters for water heating generally suffer from low heat exchange efficiency, have simple heat exchange channel designs, short coolant flow paths or dead zones, and insufficient heat exchange, so there is still room for improvement. Utility Model Content

[0004] To overcome the problems of insufficient heat exchange due to the simple heat exchange channel design, short coolant flow path or dead zone in water-heated PTC heaters, this application provides a high-pressure water-heated PTC heater.

[0005] The high-pressure water heating PTC heater provided in this application adopts the following technical solution: A high-pressure water heating PTC heater includes an upper shell and a base. The base forms a chamber for placing coolant, and a coolant inlet and a coolant outlet are respectively opened on the side wall of the base. A heating element is provided in the upper shell, which is a heating core inserted into the base. A heat exchange structure is provided in the base, which includes a partition plate and a flow plate. The partition plate is fixed in the base, and the flow plate is fixed to the side wall of the partition plate and is arranged in a bent shape.

[0006] By adopting the above technical solution, a partition plate is set inside the base to separate the base area, so that the coolant entering the base can be diverted to both sides of the partition plate, thereby making the heating effect of the heating core on the coolant more uniform; on the other hand, the partition plate supports the flow plate, which extends the flow path of the coolant to achieve sufficient heat exchange and improve the overall heat exchange efficiency.

[0007] Preferably, the flow plate is in the form of several reciprocating bends extending longitudinally, and the flow plate is spaced apart on the side wall of the partition plate and located between adjacent heating cores.

[0008] By adopting the above technical solution, the flow direction of the coolant is guided by the arrangement of several reciprocating bending flow plates, thereby extending the residence time of the coolant in the base and easily improving the heat exchange efficiency.

[0009] Preferably, the bottom of the upper housing extends to form a mounting base for mounting the heating element. The mounting bases are arranged side by side and spaced apart on both sides of the partition plate, and the mounting bases on the same side of the partition plate are staggered front to back.

[0010] By adopting the above technical solution, the staggered arrangement of the heating core and the mounting base creates a transverse U-shaped loop between adjacent mounting bases. This loop, combined with the longitudinally extending flow plate, extends the residence time of the coolant and maximizes the contact between the coolant and the heating core through lateral and longitudinal synergy, effectively improving heat exchange efficiency.

[0011] Preferably, the heat exchange structure further includes dividing strips, which are fixed at intervals to the bottom of the base and located below the flow plate.

[0012] By adopting the above technical solution, the spaced partition strips create a wave-shaped flow path for the coolant as it flows through the bottom of the base, which also helps to extend the residence time of the coolant and increase the heat exchange effect.

[0013] Preferably, flow channels are formed between the two ends of the partition plate and the corresponding sidewalls of the base.

[0014] By adopting the above technical solution, the flow channel design avoids the blockage of the area by the partition plate, reduces the dead zone of flow, and is conducive to the flow and heat exchange of coolant.

[0015] Preferably, the mounting seats are arranged side by side and spaced apart on both sides of the bottom of the upper housing, and a first reinforcing rib is fixed between the side by side mounting seats.

[0016] Preferably, a heat dissipation groove is formed on the side wall of the upper housing; the upper housing is fixed to the base by circumferentially arranged fixing bolts, and a reinforcing block is fixed in the heat dissipation groove at the position corresponding to the fixing bolt.

[0017] By adopting the above technical solution, the heat dissipation groove can increase the contact area with air, assist in heat dissipation during high-power operation, and prevent the surface temperature of the casing from becoming too high; the reinforcing block provides extension space for the installation of the fixing bolts on the one hand, and strengthens the structural strength of the fixing bolt installation on the other hand.

[0018] Preferably, a second reinforcing rib is fixed on the outer wall of the base at the misalignment point with the fixing bolt.

[0019] In summary, this application includes at least one of the following beneficial technical effects: The partition plate inside the base separates the base area, allowing the coolant entering the base to flow to both sides of the partition plate, thus making the heating effect of the heating core on the coolant more uniform; on the other hand, the partition plate supports the flow plate, which extends the flow path of the coolant to achieve full heat exchange and improve the overall heat exchange efficiency. The longitudinal flow direction of the coolant is guided by the arrangement of several reciprocating and bent flow plates. The staggered arrangement of the heating core and the mounting base creates a transverse U-shaped loop between adjacent mounting bases. Through the synergy of transverse and longitudinal flow, the residence time of the coolant is extended and the coolant is brought into contact with the heating core as much as possible, thus effectively improving the heat exchange efficiency. The spaced-out protrusions create a wavy flow path for the coolant as it flows through the bottom of the base, which also helps to extend the residence time of the coolant and increase the heat exchange effect. The design of the flow channels avoids the blockage of the partition plate area, reduces the dead zone of the flow, and is conducive to the flow of coolant and heat exchange. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a partial exploded structural diagram of the upper shell and base with some of the flow plates hidden in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the bottom mounting base of the upper shell and the first reinforcing rib in an embodiment of this application; Figure 4 This is a partial cross-sectional view of the flow plate and the dividing ridges according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Upper shell; 11. Heat dissipation groove; 111. Reinforcing block; 12. Mounting base; 13. First reinforcing rib; 2. Base; 21. Coolant inlet; 22. Coolant outlet; 23. Second reinforcing rib; 3. Fixing bolt; 4. Heating core; 5. Heat exchange structure; 51. Partition plate; 52. Flow plate; 53. Separating ridge; 6. Flow channel. Detailed Implementation

[0022] The present application will be further described in detail below with reference to the accompanying drawings.

[0023] This application discloses a high-pressure water heating PTC heater, referring to... Figure 1 , 2 It includes an upper shell 1 and a base 2. The base 2 has a chamber for placing coolant. Coolant inlet 21 and coolant outlet 22 are respectively opened on the opposite side walls of the base 2.

[0024] Reference Figure 1 , 2A heat dissipation groove 11 is provided on the circumferential side wall of the upper shell 1 to increase the contact area with air and assist in heat dissipation during high-power operation to prevent the shell surface temperature from becoming too high. The upper shell 1 is fixed to the base 2 by circumferentially arranged fixing bolts 3, and a reinforcing block 111 is fixed in the heat dissipation groove 11 at the corresponding position of the fixing bolt 3. The reinforcing block 111 provides extension space for the installation of the fixing bolt 3 on the one hand, and strengthens the structural strength of the installation of the fixing bolt 3 on the other hand. A second reinforcing rib 23 is fixed on the outer side wall of the base 2 at the misalignment with the fixing bolt 3.

[0025] Reference Figure 2 , 3 The upper housing 1 is provided with a heating component, which is a heating core 4 inserted into the base 2. The bottom of the upper housing 1 extends to form a mounting seat 12 for mounting the heating core 4. The mounting seats 12 are arranged side by side and spaced apart on both sides of the bottom of the upper housing 1 along the length direction, and a first reinforcing rib 13 is fixed between the side by side mounting seats 12.

[0026] Reference Figure 2 The base 2 is provided with a heat exchange structure 5, which includes a partition plate 51. The partition plate 51 is located below the first reinforcing rib 13, in the middle of the base 2 and extends along the length of the base 2. Flow channels 6 are formed between the two ends of the partition plate 51 and the corresponding side walls of the base 2. The flow channels 6 prevent the partition plate 51 from blocking the area, reduce dead zones, and facilitate the flow and heat exchange of the coolant. The partition plate 51 in the base 2 separates the area of ​​the base 2, allowing the coolant entering the base 2 to flow to both sides of the partition plate 51, thereby making the heating effect of the heating core 4 on the coolant more uniform.

[0027] Reference Figure 2 , 3 The mounting base 12 at the bottom of the upper housing 1 is inserted into the base 2, and the mounting bases 12 on both sides are located on both sides of the partition plate 51. The mounting bases 12 on the same side of the partition plate 51 are staggered back and forth in the direction closer to the partition plate 51. The staggered arrangement of the heating core 4 and the mounting base 12 forms a transverse U-shaped loop between adjacent mounting bases 12, which prolongs the residence time of the coolant and improves the heat exchange efficiency. It should be noted that there is a gap between the mounting base 12 and the inner wall of the base 2, which does not block the flow of coolant.

[0028] Reference Figure 2 , 4The heat exchange structure 5 also includes a flow plate 52. The flow plate 52 is spaced apart on the side wall of the partition plate 51 and located between adjacent heating cores 4. The flow plate 52 has several longitudinally extending reciprocating bends. The partition plate 51 supports the flow plate 52. The reciprocating bends of the flow plate 52 can extend the flow path of the coolant to achieve sufficient heat exchange and improve the overall heat exchange efficiency. There is a gap between the flow plate 52 and the inner side wall of the base 2, which does not block the flow of coolant. Thus, the staggered mounting base 12 forms a transverse U-shaped loop, which, together with the longitudinally extending flow plate 52, through the synergy of transverse and longitudinal, extends the residence time of the coolant and makes the coolant contact the heating core 4 as much as possible, effectively improving the heat exchange efficiency.

[0029] Reference Figure 2 , 4 The heat exchange structure 5 also includes a partition strip 53, which is fixed at intervals at the bottom of the base 2 and located below the flow plate 52. There is a gap between the bottom of the flow plate 52 and the upper part of the partition strip 53. The partition strip 53 makes the coolant flow through the bottom of the base 2 in a wave-shaped flow path, which also helps to prolong the residence time of the coolant and increase the heat exchange effect.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-pressure water heating PTC heater, comprising an upper shell (1) and a base (2), characterized in that: The base (2) forms a chamber for placing coolant. Coolant inlet (21) and coolant outlet (22) are respectively opened on the side wall of the base (2). The upper shell (1) is provided with a heating component, which is a heating core (4) inserted into the base (2). The base (2) is provided with a heat exchange structure (5). The heat exchange structure (5) includes a partition plate (51) and a flow plate (52). The partition plate (51) is fixed in the base (2), and the flow plate (52) is fixed on the side wall of the partition plate (51) and is arranged in a bent shape.

2. The high-pressure water heating PTC heater according to claim 1, characterized in that: The flow plate (52) is longitudinally extended in several reciprocating bends, and the flow plate (52) is spaced apart on the side wall of the partition plate (51) and located between adjacent heating cores (4).

3. A high-pressure water heating PTC heater according to claim 1, characterized in that: The bottom of the upper housing (1) extends to form a mounting seat (12) for mounting the heating core (4). The mounting seats (12) are arranged side by side and spaced apart on both sides of the partition plate (51), and the mounting seats (12) on the same side of the partition plate (51) are staggered front and back.

4. A high-pressure water heating PTC heater according to claim 1, characterized in that: The heat exchange structure (5) also includes a partition strip (53), which is fixed at intervals to the bottom of the base (2) and located below the flow plate (52).

5. A high-pressure water heating PTC heater according to claim 1, characterized in that: A flow channel (6) is formed between the two ends of the partition plate (51) and the corresponding side wall of the base (2).

6. A high-pressure water heating PTC heater according to claim 3, characterized in that: The mounting bases (12) are arranged side by side and spaced apart on both sides of the bottom of the upper housing (1), and a first reinforcing rib (13) is fixed between the side by side mounting bases (12).

7. A high-pressure water heating PTC heater according to claim 1, characterized in that: The upper housing (1) has a heat dissipation groove (11) on its side wall; the upper housing (1) is fixed to the base (2) by a circumferentially arranged fixing bolt (3), and a reinforcing block (111) is fixed in the heat dissipation groove (11) at the position corresponding to the fixing bolt (3).

8. A high-pressure water heating PTC heater according to claim 7, characterized in that: A second reinforcing rib (23) is fixed on the outer wall of the base (2) at the misalignment point with the fixing bolt (3).

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