Heater

Abstract

The invention provides a heater and a heating system of an electric automobile, the heater provided by the invention comprises a heating part, the heating part comprises a first shell and a heating pipe, the heating pipe comprises a heating pipeline, at least part of the heating pipeline is located in the first shell, and the heating pipeline is located in the first shell. A pipe cavity of the heating pipeline is not communicated with an inner cavity of the first shell; a heating film is arranged on at least part of the inner surface of the heating pipeline; the first shell is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both communicated with an inner cavity of the first shell. The heater can reduce heat loss and improve heating efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of heating devices, and in particular to a heater and a heating system of an electric vehicle. Background Art

[0002] The battery is one of the important components of new energy electric vehicles. The suitable working temperature of the battery is generally 20℃~40℃. When the outdoor temperature is low, electric vehicles need to be equipped with a heat source to quickly raise the vehicle battery temperature to a suitable temperature. This requires the heat source to have a high heating efficiency so that the control is accurate and rapid. At present, the heat source for heating the battery dissipates heat quickly and has a low heating efficiency. Summary of the invention

[0003] The purpose of the present application is to provide a heater and a heating system for an electric vehicle, wherein the heater can reduce heat loss and improve heating efficiency.

[0004] The heater provided in the present application includes a heating part, which includes a first shell and a heating tube, the heating tube includes a heating pipe, at least part of the heating pipe is located in the first shell, and the tube cavity of the heating pipe is not connected to the inner cavity of the first shell; the heating tube includes a heating film, and the heating film is provided on at least part of the inner surface of the heating pipe; the first shell is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the inner cavity of the first shell.

[0005] The heating tube in the heater can be completely immersed in the fluid flowing into the first shell, thereby reducing heat loss and improving heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 An exploded view of a heater in an embodiment of the present application;

[0007] Figure 2 for Figure 1 A schematic diagram of the heater after assembly, without showing the second shell;

[0008] Figure 3 for Figure 1 Side view of the middle heater after assembly;

[0009] Figure 4 for Figure 3 A top view of

[0010] Figure 5 for Figure 4 Exploded view of the middle heating section;

[0011] Figure 6 for Figure 4 A side view of the middle heating section;

[0012] Figure 7 for Figure 6 A top view of

[0013] Figure 8 for Figure 5 Schematic diagram of the heating tube;

[0014] Fig. 9 for Figure 4 AA sectional view of the middle heating part;

[0015] Fig.10 for Figure 5 A schematic diagram of the first shell of the central main body;

[0016] Fig.11 for Figure 4 A schematic diagram of the structure of the middle flow guide assembly;

[0017] Fig.12 for Figure 3 BB cross-sectional view of the middle heating part;

[0018] Fig.13 for Figure 5 Schematic diagram of the structure of the middle end board;

[0019] Fig.14 for Fig.13 Enlarged view of the middle C area;

[0020] Fig.15 for Figure 1 Schematic diagram of the central control unit;

[0021] Fig.16 for Figure 5 A schematic diagram of the structure in which a film temperature sensor is provided in the middle heating tube;

[0022] Fig.17 for Fig.16 Schematic diagram of the mid-film temperature sensor.

[0023] Figure 1-17 The reference numerals in the drawings are described as follows:

[0024] 1000-heater;

[0025] 001-heating unit;

[0026] 0011-end plate; 00111-liquid inlet; 00112-liquid outlet; 00113-boss; 00113a-first step portion; 00114-first mounting interface; 00115-second socket; 00116-second step portion;

[0027] 0012-heating tube; 00121-heating pipe; 00122-heating film; 00123-electrode;

[0028] 0013-flow guide assembly; 00131-flow guide plate; 00131a-limiting groove; 00132-connecting strip; 00133-connecting rib plate;

[0029] 0014-main housing; 00141-through hole; 00142-connector; 00143-detection hole; 00144-open end; 00145-connection end;

[0030] 0015-Interface pipe;

[0031] 001A-first shell;

[0032] 002-Control Department;

[0033] 0021-circuit board bracket; 0022-first circuit board; 0023-second circuit board; 0024-first fastener; 0025-second fastener;

[0034] 003- second shell;

[0035] 004-Low voltage connector;

[0036] 005-high voltage connector;

[0037] 006- Sealing parts;

[0038] 007-water temperature sensor;

[0039] 008-film temperature sensor; 0081-detection circuit; 0082-detection head; 0083-elastic element; 00831-winding end; 00832-opening. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Please refer to Figure 1-4 , Figure 1 An exploded view of a heater in an embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of the heater after assembly, without showing the second shell 003; Figure 3 for Figure 1 Side view of the middle heater after assembly; Figure 4 for Figure 3 Top view of the .

[0042] The heater 1000 in this embodiment can be used to heat a fluid, and can be specifically applied in the field of electric vehicles, such as heating a fluid in a heat pipe of an electric vehicle, where the fluid is water. When the temperature is low, the heated fluid can heat the battery of the electric vehicle to keep it at the required operating temperature. The heater 1000 includes a heating unit 001, a second shell 003, and a control unit 002, wherein at least part of the control unit 002 and the heating unit 001 are located in the second shell 003, the heating unit 001 is an actuator for electrically heating the fluid, the control unit 002 is provided with a circuit board for controlling the electrical heating of the heating unit 001, and the second shell 003 is used to protect the heating unit 001 and the control unit 002.

[0043] The various components of the heater 1000 are described in detail below.

[0044] First, please look at the structure of the heating part 001, and you can continue to refer to Figure 5-10 understand, Figure 5 for Figure 4 Exploded view of the middle heating part 001; Figure 6 for Figure 4 A side view of the middle heating section 001; Figure 7 for Figure 6 A top view of Figure 8 for Figure 5 Schematic diagram of the middle heating tube 0012; Fig. 9 for Figure 4 AA sectional view of the middle heating part 001; Fig.10 for Figure 5 Schematic diagram of the main shell 0014.

[0045] In this embodiment, the heating unit 001 includes a heating tube 0012 and a first shell 001A. The first shell 001A includes a main shell 0014 with one end opened. Fig.10 As shown, one end of the opening of the main shell 0014 is defined as a first opening portion 00144, and the first shell 001A also includes an end plate 0011 that seals the first opening portion 00144 of the main shell 0014, so that the first shell 001A and the main shell 0014 can form a relatively closed first shell 001A after being assembled and matched. One end of the main shell 0014 is open, which is convenient for installing the heating tube 0012 inside.

[0046] Look again Figure 8The heating tube 0012 of the heating part 001 includes a heating pipe 00121. At least a portion of the inner surface of the heating pipe 00121 is provided with a heating film 00122. Of course, in order to improve the heating effect, the entire inner surface of the heating pipe 00121 can be provided with a heating film 00122. The heating film 00122 can be a heating film that can achieve rapid heating. The heating film 00122 is a multi-layer structure, including an insulating layer and a heating layer. The specific structural form of the heating film 00122 can be understood by referring to the prior art and will not be repeated here. The heating film 00122 can be directly attached to the inner surface of the heating pipe 00121, or it can be pre-equipped with a core mold and a cylindrical heating film 00122 wrapped around the core mold. The plate-shaped blank of the heating pipe 00121 is rolled around the heating film 00122 to form the heating pipe 00121. After the rolling is completed, the heating film 00122 is attached and fixed in the heating pipe 00121, and the core mold can be pulled out to form the required heating pipe 00121. Those skilled in the art can also form the heating pipe 00121 through other processing methods, and this embodiment does not make specific restrictions.

[0047] It should be emphasized that the heating pipe 00121 in this embodiment is located in the first shell 001A and is not connected to the inner cavity of the first shell 001A, that is, the lumen of the heating pipe 00121 and the inner cavity of the first shell 001A are isolated from each other. Figure 8 , 9 As shown, the heating tube 0012 also includes an electrode 00123. The heating pipe 00121 has two ends, and an electrode 00123 is arranged inside each of the two ends. The electrode 00123 is electrically connected to the heating film 00122. In this way, when the electrode 00123 is powered on, the heating film 00122 can generate heat, and the heating pipe 00121 is heated accordingly. It can be seen that the electrode 00123 can also be arranged at other positions of the heating tube 0012, as long as the heating film 00122 can be heated after power is turned on. The electrode 00123 is arranged at the end of the heating pipe 00121, which is convenient for the arrangement and fixation of the electrode 00123.

[0048] Fig.10 In the embodiment, the main shell 0014 includes a connecting end 00145 opposite to the first opening 00144, and the two ends of the heating pipe 00121 can abut against the inner surface of the connecting end 00145 of the main shell 0014, and the heating pipe 00121 can be welded and fixed to the inner surface of the connecting end 00145 of the main shell 0014. At this time, the lumen of the heating pipe 00121 and the inner lumen of the first shell 001A are not connected, and the fluid can flow between the outer surface of the heating pipe 00121 and the inner surface of the first shell 001A.

[0049] In addition, the first shell 001A of the heating part 001 is provided with a liquid inlet 00111 and a liquid outlet 00112. The liquid inlet 00111 and the liquid outlet 00112 in this embodiment are specifically provided at the end plate 0011 of the first shell 001A. The positions of the liquid inlet 00111 and the liquid outlet 00112 can be connected with an interface pipe 0015. The two interface pipes 0015 are respectively used to connect the pipelines of the fluid, such as the heat pipes of the car. The two interface pipes 0015 can be welded to the liquid inlet 00111 and the liquid outlet 00112. The liquid inlet 00111 and the liquid outlet 00112 are both connected to the inner cavity of the first shell 001A. In this way, the fluid can enter the first shell 001A from the liquid inlet 00111 through the interface tube 0015. Since the heating pipe 00121 and the heating film 00122 on its inner surface are located in the first shell 001A, after the fluid enters the first shell 001A, it will contact the outer surface of the heating pipe 00121 and then be heated. The heated fluid can flow out from the liquid outlet 00112 through an interface tube 0015.

[0050] It can be seen that in this embodiment, the first shell 001A forms a closed inner cavity to accommodate the fluid to be heated, and the heating tube 0012 is located in the first shell 001A. Therefore, during the heating process of the fluid, the entire heating tube 0012 is immersed in the fluid flowing into the first shell 001A, and the heat of the heating tube 0012 can be used to heat the fluid, thereby reducing heat loss and improving heating efficiency. Fig. 9 As shown, the heating pipe 00121 and the heating film 00122 inside it are both located inside the first shell 001A, and the heating pipe 00121 does not extend out of the first shell 001A. In this way, the heating film 00122 is all located inside the first shell 001A, and heat is not wasted, but the end of the heating pipe 00121 can also pass through the first shell 001A.

[0051] In addition, in this embodiment, at least part of the outer surface of the first shell 001A may be covered with a thermal insulation layer (not shown in the figure), which can further reduce heat loss. For example, all or part of the outer surface of the main shell 0014 may be covered with a thermal insulation layer, and all or part of the surface of the side of the end plate 0011 away from the main shell 0014 may be covered with a thermal insulation layer.

[0052] Can continue to combine Fig.11 , 12 understand, Fig.11 for Figure 4 A schematic diagram of the structure of the middle flow guide assembly 0013; Fig.12 for Figure 3 BB cross-sectional view of the middle heating part.

[0053] The heating unit 001 in this embodiment further includes a flow guide assembly 0013, which is located in the first housing 001A. The flow guide assembly 0013 specifically includes a plurality of flow guide plates 00131, which are arranged in sequence relative to each other. The flow guide plates 00131 have two side surfaces, which are the two side surfaces of the flow guide plates 00131 distributed along the thickness direction. Fig.11 It can be seen that the flow guide assembly 0013 includes a row of flow guide plates 00131, including a total of 5 flow guide plates 00131, but it is obvious that the number can be adjusted according to actual needs. In addition, each flow guide plate 00131 is provided with a limiting groove 00131a, and a portion of the heating tube 0012 can be limited in the limiting groove 00131a. In this way, when the fluid enters the first shell 001A, since the flow guide assembly 0013 includes multiple flow guide plates 00131, the fluid can flow between adjacent flow guide plates 00131, and the heating tube 0012 is limited in the limiting groove 00131a of the flow guide plate 00131, so that the fluid can flow around the heating tube 0012 relatively evenly, thereby improving the uniformity of heating.

[0054] The limiting groove 00131a of the guide plate 00131 in this embodiment is a notch provided on the edge of the guide plate 00131, so that the heating pipe 00121 can directly fall into the notch, which is easy to install. It can be seen that the limiting groove 00131a can also be a through hole set on the guide plate 00131, and the heating pipe 00121 can pass through the through hole. Figure 4 , 9 As shown, in this embodiment, the heating pipe 00121 of the heating pipe 0012 is U-shaped. In this case, the limiting groove 00131a is set as a notch, and the U-shaped heating pipe 00121 can directly fall into the notch, which is easy to install and position. Setting the heating pipe 0012 to be U-shaped, on the one hand, can increase the volume of the heating pipe 0012 as much as possible in a limited space, thereby increasing the area in contact with the fluid and improving the heating efficiency. On the other hand, the electrodes 00123 at the two ends of the heating pipe 00121 can be set on the same side, which is more compact and convenient for establishing electrical connection. Of course, the heating pipe 00121 can also be other shapes, such as M-shaped, etc. If it is set to be U-shaped, the flow resistance is also smaller. Figure 6 , 7 As shown, the two electrodes 00123 of the heating tube 0012 both extend from the same end of the main shell 0014 , specifically, both extend from the connecting end 00145 of the main shell 0014 opposite to the first opening 00144 .

[0055] like Figure 5 , 12As shown, in this embodiment, the heating part 001 includes a plurality of heating tubes 0012, where "plurality" refers to two or more, and the plurality of heating tubes 0012 are stacked. The stacking arrangement here does not need to be in contact, and can have a certain interval to allow the fluid to flow between adjacent heating tubes 0012. The heating part 001 also includes a plurality of stacked flow guide components 0013, and each flow guide component 0013 corresponds to a limited position of a heating tube 0012. In this way, the increase in the number of heating tubes 0012 is conducive to increasing the contact area with the fluid. Figure 5 , 12 The viewing angle defines the up and down directions. The heating part 001 in this embodiment is specifically provided with two heating tubes 0012 and two flow guide components 0013. The flow guide components 0013 located at the lower side and the flow guide components 0013 located at the upper side are symmetrically arranged in the horizontal direction. The notch of the limiting groove 00131a of the flow guide plate 00131 in the lower flow guide component 0013 faces upward, and the notch of the limiting groove 00131a of the flow guide plate 00131 in the upper flow guide component 0013 faces downward, so that the upper and lower layers of the flow guide components 0013 can be buckled together, and the two heating tubes 0012 are limited between the two layers, and the limiting is more reliable. Of course, the setting direction of each layer of the flow guide components 0013 is also possible.

[0056] The flow guide assembly 0013 may also include a connecting strip 00132, such as Fig.11 As shown, the connecting strip 00132 connects the ends of the plurality of guide plates 00131 together, so that the guide assembly 0013 forms an integral frame structure, which is easier to install in the first housing 001A, and the fluid can flow evenly in the frame structure. The guide assembly 0013 can also include a connecting rib plate 00133, which connects the middle parts of the plurality of guide plates 00131 in series, which can also improve the overall reliability of the guide assembly 0013 and make the guide more even.

[0057] Look again Fig. 9The first shell 001A includes two oppositely arranged ends, one end is an end plate 0011, which is provided with a liquid inlet 00111 and a liquid outlet 00112, and the two ports of the U-shaped heating pipe 00121 are directed toward the other end, that is, toward the connecting end 00145 of the main shell 0014, that is, the two electrodes 00123 of the heating tube 0012 extend from the connecting end 00145, and the direction from the first opening 00144 of the first shell 001A to the connecting end 00145 is defined as a first direction, and the first direction is perpendicular to the above-mentioned up and down direction, that is, perpendicular to the direction in which the heating tubes 0012 are stacked. At this time, the multiple guide plates 00131 of the guide component 0013 can be distributed along the first direction, and a second direction is also defined. The second direction is perpendicular to the first direction and the up and down directions. The size of the guide component 0013 in the second direction gradually increases along the first direction. In this way, the first guide area 001a and the second guide area 001b whose sizes in the second direction gradually decrease along the first direction are formed on both sides of the guide component 0013. The first guide area 001a is connected to the liquid inlet 00111, and the second guide area 001b is connected to the liquid outlet 00112. This arrangement is conducive to the fluid flowing evenly along the first direction after entering, so as to contact more with the heating tube 0012, and avoid the fluid from quickly flowing from the liquid inlet 00111 to the liquid outlet 00112. At this time, the guide plate 00131 of the heating part 001 can also be set as an arc plate to adapt to the trend of the fluid flowing from the liquid inlet 00111 to the liquid outlet 00112, reduce flow resistance, Fig. 9 Among them, only the guide plate 00131 abutting against the connection end 00145 of the main shell 0014 is a straight plate, and the others are all curved plates.

[0058] The guide assembly 00133 in this embodiment can be fixed in the first shell 001A, can be clamped between two opposite sides of the main shell 0014 arranged along the second direction, or can be clamped between the upper and lower sides of the main shell 0014, or can be clamped between the connecting end 00145 of the main shell 0014 and the end plate 0011, and can also be connected to the first shell 001A by fasteners. This embodiment does not make specific restrictions.

[0059] Please continue to refer to Figure 5 , and combined with Fig.13 , 14 understand, Fig.13 for Figure 5 Structural schematic diagram of middle end board 0011; Fig.14 for Fig.13 Magnified view of area C in the middle.

[0060] As mentioned above, the first shell 001A in this embodiment includes a main shell 0014 and an end plate 0011. The end plate 0011 and the main shell 0014 cooperate to form a relatively closed first shell 001A, thereby forming an inner cavity of the first shell 001A for fluid to flow in and out, and the heating of the fluid is carried out in the inner cavity of the first shell 001A.

[0061] Specifically, the end plate 0011 is provided with a first matching portion, and the first matching portion is used to match with the first opening portion 00144 of the main shell 0014 to be sealed and connected with the first opening portion 00144. Specifically, the first matching portion is a boss 00113 provided on the inner side of the end plate 0011, and the inner side is the side facing the main shell 0014. The boss 00113 of the end plate 0011 and the first opening portion 00144 of the main shell 0014 are matched, that is, the opening shape and size of the boss 00113 and the main shell 0014 are basically the same, and the boss 00113 can be inserted into the opening of the first opening portion 00144 of the main shell 0014, and then the boss 00113 and the first opening portion 00144 of the main shell 0014 are welded and fixed. Fig.13 As shown, the first step portion 00113a is arranged around the boss 00113, and specifically, the step portion of the first step portion 00113a is inserted into the opening of the first opening portion 00144 of the main shell 0014, and the end surface of the first opening portion 00144 of the main shell 0014 will abut against the step surface of the first step portion 00113a, so as to complete the welding more reliably. At this time, the liquid inlet 00111 and the liquid outlet 00112 of the heating part 001 are both arranged on the end plate 0011, and the liquid inlet 00111 and the liquid outlet 00112 pass through the end plate 0011 on the boss 00113 along the inside and outside.

[0062] Look again Fig.10 The first opening portion 00144 of the main shell 0014 is an end facing the end plate 0011, and a through hole 00141 is provided at the connection end 00145 of the main shell 0014 opposite to the first opening portion 00144. The end of the above-mentioned heating tube 0012 can be inserted into the through hole 00141, and the electrode 00123 can extend out of the main shell 0014. In this embodiment, two heating tubes 0012 are provided, and a total of four through holes 00141 are provided. After the electrode 00123 is extended, it is convenient to establish an electrical connection with the external control unit 002. Specifically, in this embodiment, it can be connected to the circuit board of the control unit 002.

[0063] The heating pipe 00121 in this embodiment can be welded and fixed to the first shell 001A. Specifically, the end of the heating pipe 00121 can be inserted into the through hole 00141 for welding and fixing. Of course, the heating pipe 00121 does not need to be inserted into the through hole 00141. The annular end surface of the end of the heating pipe 00121 can be directly attached to the inner surface of the connecting end 00145 for welding and fixing. At this time, the end of the heat pipe 00121 needs to correspond to the position of the through hole 00141 to allow the electrode 00123 to pass through the through hole 00141.

[0064] Combination Figure 1 and Fig.10 It is understood that the main shell 0014 may also be provided with a detection hole 00143, the heater 1000 may be provided with a water temperature sensor 007, and the water temperature sensor 007 may be installed at the position of the detection hole 00143 to detect the water temperature in the first shell 001A. Fig.10 In the embodiment, the detection hole 00143 is arranged at the upper part of the main housing 0014, and the water temperature sensor 007 is sealed with the detection hole 00143, that is, the detection probe of the water temperature sensor 007 can contact the fluid in the first housing 001A, but the fluid cannot leak from the detection hole 00143. In the working state, when the detection hole 00143 is at the upper part, leakage at the detection hole 00143 can be further reduced or avoided, but it can be known that the detection hole 00143 can also be arranged at other positions.

[0065] Look again Fig.15 , Fig.15 for Figure 1 Schematic diagram of the control unit 002.

[0066] The heater 1000 in this embodiment further includes a control unit 002, which is directly or indirectly connected to the first shell 001A. In this embodiment, the control unit 002 is fixedly connected to the main shell 0014 of the first shell 001A. Figure 1 The second housing 003 is fixed and then indirectly connected to the first housing 001A. The control unit 002 specifically includes a circuit board bracket 0021 and at least one circuit board mounted on the circuit board bracket 0021. The circuit board bracket 0021 is connected to the first housing 001A and serves as a mounting base for the circuit board. Fig.15The control unit 002 shown in the figure includes a first circuit board 0022 and a second circuit board 0023. The first circuit board 0022 can be a strong current circuit board, and the second circuit board 0023 can be a weak current circuit board. This is clearly divided. Of course, it can also be designed according to actual needs. In addition, the first circuit board 0022 and the second circuit board 0023 can also be integrated into one circuit board, or more circuit boards can be set according to actual needs. This embodiment does not make specific restrictions.

[0067] Specifically, the first circuit board 0022 can be fixed to the circuit board bracket 0021 by a first fastener 0024, and the second circuit board 0023 can be fixed to the circuit board bracket 0021 by a second fastener 0025. The first fastener 0024 and the second fastener 0025 can be mechanical connection structures such as screws and bolts. In this embodiment, the circuit board bracket 0021 is generally an L-shaped bracket, including a bracket end 00211 arranged opposite to the connection end 00145 of the main housing 0014, and both sides of the bracket end 00211 are extended with bracket side portions 00212 in the direction opposite to the first direction. The first circuit board 0022 is installed on the bracket end 00211, and the second circuit board 0023 is supported and connected above the two bracket side portions 00212.

[0068] In this way, when the control unit 002 and the heating unit 001 are assembled together, the bracket end 00211 is opposite to the connection end 00145 of the main shell 0014 and is located on the outside of the connection end 00145. The outside is relative to the inner cavity of the main shell 0014. The side close to the inner cavity is the inner side, and the opposite is the outer side. The two bracket side parts 00212 are located on both sides of the main shell 0014 distributed in the second direction, that is, part of the main shell 0014 is embedded in the circuit board bracket 0021. Accordingly, the first circuit board 0022 is located at one end of the heating unit 001 along the first direction, and the second circuit board 0023 is located above the heating unit 001. In this way, the structure is relatively compact, which is conducive to the electrical connection between the heating unit 001 and the control unit 002. The electrode 00123 extending from the connection end 00145 of the main shell 0014 can be directly connected to the first circuit board 0022.

[0069] Combination Figure 2 , 10 15. In this embodiment, when the first fastener 0024 fastens the first circuit board 0022 and the bracket end 00211, it can also pass through the bracket end 00211 and be fixed to the main housing 0014. Fig.10As shown, the outer surface of the connection end 00145 of the main housing 0014 is further provided with a connection piece 00142, and the connection piece 00142 is provided with a connection hole, and the first fastener 0024 can be inserted into the connection hole of the connection piece 00142. The connection piece 00142 is specifically a "X"-shaped connection frame, and the middle part of the connection frame can be welded to the connection end 00145. The two lugs at both ends of the connection piece 00142 can be provided with connection holes that match the first fastener 0024. It can be seen that the first fastener 0024 can connect the control unit 002 to the main housing 0014 while connecting the first circuit board 0022 and the circuit board bracket 0021. Of course, the circuit board bracket 0021 and the main housing 0014 can also be connected and fixed separately.

[0070] In addition, it can be understood that the circuit board bracket 0021 is not limited to the above structure, as long as it can provide connection support for the circuit board. In fact, it is not necessary to set up a circuit board bracket. The second shell 003 and the shell 001A can also be provided with connecting parts to fix the circuit board. However, the structural form of the circuit board bracket 0021 provided in this embodiment makes the circuit board installation simple and the overall structure compact.

[0071] Look again Figure 1 and Fig.13 The heater 1000 further includes a high-voltage connector 005 and a low-voltage connector 004. The low-voltage connector 004 is used to connect to an external control signal, and the high-voltage connector 005 is used to connect to the power supply required by the heater 1000. The high-voltage connector 005 and the low-voltage connector 004 are both mounted on the end plate 0011. The high-voltage connector 005 and the pressure connector can be connected to the control unit 002. In this embodiment, the boss 00113 on the inner side of the end plate 0011 is adapted to the first opening 00144 of the main housing 0014. The end plate 0011 further includes a second matching portion 00117. The second matching portion 00117 is located outside the boss 00113. Figure 3 In the figure, the second mating portion 00117 is located on the upper side of the boss 00113. The second mating portion 00117 is provided with a first mounting interface 00114 and a second mounting interface 00115. The first mounting interface 00114 is used to install the low-voltage connector 004, and the second mounting interface 00115 is used to install the high-voltage connector 005. The end plate 0011 can be matched with the second shell 003. The second shell 003 is a shell-like structure with one end open, and its open end is the second opening portion. The entire end plate 0011 is adapted to the second opening portion of the second shell 003 for sealing connection. Similar to the connection method of the boss 00113 and the main shell 0014, the end plate 0011 is also provided with a step portion around it, which is defined as the second step portion 00116. The step of the second step portion 00116 is inserted into the second opening portion of the second shell 003, and the step surface of the second step portion 00116 abuts against the end surface of the second opening portion of the second shell 003 and is fixed by welding, as shown in FIG. Fig.12 As shown, the weld P between the second shell 003 and the end plate 0011 is illustrated.

[0072] It can be seen that the end plate 0011 in this embodiment not only cooperates with the main shell 0014 cover to form a relatively closed first shell 001A for fluid flow inside the heater 1000, but also cooperates with the second opening cover of the second shell 003 to form a relatively closed external shell. In this way, the number of structural parts can be reduced and the structure is more compact. At this time, except for the end cover 0011 and the corresponding interface pipe 0015, the other parts of the heating part 001 are all located in the second shell 003, and the control part 002 is also located in the second shell 003. At the same time, since only part of the end plate 0011 cooperates with the first opening 00144 of the main shell 0014, the rest of the end plate 0011 can be provided with a first installation interface 00114 and a second installation interface 00115 for installing the low-voltage connector 004 and the high-voltage connector 005, specifically, the second matching part 00117 of the end plate 0011, and the part of the end plate 0011 located above the boss 00113 can be defined as the second matching part 00117. With such a configuration, the structure is more compact. And refer to Fig.12 It is understood that the second circuit board 0023 of the control unit 002 is arranged on the upper side of the main shell 0014, that is, on the side of the heating unit 001 close to the second matching part 00117. At this time, the high-voltage connector 005 and the low-voltage connector 004 installed on the upper side of the end plate 0011 of the heating unit 001 can be relatively close to the control unit 002 after being plugged in, so it is more convenient to achieve electrical connection with the control unit 002.

[0073] Look again Figure 1 The heater 1000 in this embodiment further includes a sealing component 006. The sealing component 006 can be provided between the low-voltage connector 004 and the end plate 0011, and between the high-voltage connector 005 and the end plate 0011, to prevent external water vapor from entering the interior of the heater 1000. The sealing component 006 can be Figure 1 The rectangular ring shown in the figure may also be an O-ring, a rubber pad or a liquid sealant, etc., and the specific structural form is not limited.

[0074] In addition, in addition to the connector and the end plate 0011 being sealed by the sealing component 006 to ensure sealing while realizing plugging and unplugging operations, the heater 1000 in this embodiment has a first shell 001A formed by welding the main shell 0014 and the end plate 0011, a second shell 003 and the end plate 0011 being welded and sealed, and a heating pipe 00121 being welded to the connecting end 00145 of the main shell 0014, that is, the connecting position is mostly fixed by welding, thereby ensuring the sealing performance of the product and improving product reliability.

[0075] Please continue to refer to Fig.16 ,17 understand, Fig.16 for Figure 5 A schematic diagram of the structure in which the middle heating tube 0012 is provided with a film temperature sensor 008; Fig.17 for Fig.16 Schematic diagram of the middle film temperature sensor 008.

[0076] The heater 1000 in this embodiment is also provided with a film temperature sensor 008, which contacts the heating film 00122 in the heating pipe 00121 to detect the temperature of the heating film 00122 so as to electrically control the heating tube 0012. Specifically, the control unit 002 can control the heating of the heater 1000 in combination with the detection temperature of the water temperature sensor 007 and the detection temperature of the film temperature sensor 008.

[0077] The film temperature sensor 008 in this embodiment includes a detection circuit 0081 and a detection head 0082. The detection circuit 0081 is similar to the electrode 00123 and also extends from the end of the heating pipe 00121 and is connected to the circuit board of the control unit 002. The detection head 0082 of the film temperature sensor 008 can contact the heating film 00122 to detect the temperature of the heating film 00122.

[0078] Furthermore, if Fig.16 As shown, the film temperature sensor 008 may include an elastic element 0083, and the elastic element 0083 may be pressed against the heating film 00122, thereby allowing the detection head 0082 to always maintain contact with the heating film 00122, thereby providing a relatively accurate temperature detection value.

[0079] In detail, the elastic element 0083 is specifically an arc-shaped structure that is wound into a certain arc, and the two ends of the elastic element 0083 are curled inward to form a winding end 00831, so that the elastic element 0083 has a certain elasticity and tension, and can be supported in the heating pipe 00121, and the elastic element 0083 is in contact with the heating film 00122. The elastic element 0083 is also provided with an opening 00832, and the detection head 0082 is located outside the elastic element 0083. The detection circuit 0081 is connected to the detection head 0082 and passes through the opening 00832 to the inside of the elastic element 0083. In this way, when the elastic element 0083 is pressed against the heating film 00122, the detection head 0082 can be pressed between the elastic element 0083 and the heating film 00122, that is, the detection head 0082 can be in contact with the heating film 00122.

[0080] The embodiment of the present application also provides a heating system for an electric vehicle, including the heater 1000 described in any of the above embodiments. The heater 1000 can be used to heat a fluid. When the ambient temperature is low, the heated fluid can heat the battery of the electric vehicle to increase the temperature, thereby maintaining the battery at a desired operating temperature. The electric vehicle obviously has the same technical effects as the above embodiments, and will not be described in detail.

[0081] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A heater, characterized in that: It includes a heating part, which includes a first shell and a heating tube, and the heating tube includes a heating pipe, at least part of which is located in the first shell, and the tube cavity of the heating pipe is not connected to the inner cavity of the first shell; the heating tube includes a heating film, and the heating film is arranged on at least part of the inner surface of the heating pipe; the first shell is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the inner cavity of the first shell.

2. The heater according to claim 1, characterized in that The first shell is provided with through holes, and the two ends of the heating pipe are inserted into the corresponding through holes and fixed by welding.

3. The heater according to claim 1, characterized in that The first shell includes a main shell and an end plate. The main shell has a first opening. The end plate is sealed and connected to the first opening. The liquid inlet and the liquid outlet are both arranged on the end plate.

4. The heater according to claim 3, characterized in that Electrodes are provided at both ends of the heating pipe, and the electrodes are electrically connected to the heating film. The main shell also includes a connecting end arranged opposite to the first opening, and the two electrodes of the heating pipe extend from the connecting end of the first shell.

5. The heater according to claim 4, characterized in that The heater further includes a control unit, the control unit includes a first circuit board, the first circuit board is located outside the connection end, and the electrode is electrically connected to the first circuit board.

6. The heater according to claim 5, characterized in that The portion of the end plate is a first mating portion, which is sealed and connected to the first opening portion. The end plate also includes a second mating portion, which is provided with an installation interface. The heater also includes a high-voltage connector and / or a low-voltage connector, and the installation interface is used to install the high-voltage connector or the pressure connector.

7. The heater according to claim 6, characterized in that The heater also includes a second shell having a second opening portion, the end plate and the second opening portion are sealed and connected, the main shell and the control portion are both located in the second shell; the control portion includes a second circuit board, and the second circuit board is located on a side of the main shell close to the second mating portion.

8. The heater according to claim 7, characterized in that The end plate has a boss, the boss is the first matching portion, the first matching portion is welded to the end surface of the first opening; and / or the second matching portion is welded to the end surface of the second opening.

9. The heater according to claim 7, characterized in that The control unit includes a circuit board bracket, which is connected to the first shell, and the circuit board bracket includes a bracket end and a bracket side located on both sides of the bracket end, at least a portion of the main shell is located between the two bracket side portions, and the bracket end portion is located on the outside of the connecting end of the main shell, the first circuit board is installed on the bracket end portion, and the second circuit board support is connected to the two bracket side portions.

10. The heater according to any one of claims 1 to 9, characterized in that: The heating part includes a guide assembly, the guide assembly is located in the first shell, the guide assembly includes a plurality of guide plates, and the guide plates are arranged in sequence relative to each other; the guide plates are provided with limiting grooves, and part of the heating pipe is limited in the limiting grooves.

11. The heater according to claim 10, characterized in that The heating part includes a plurality of the heating tubes, which are stacked. The heating part also includes a plurality of the flow guide components which are stacked, and each of the flow guide components corresponds to a position limit of one of the heating tubes.

12. The heater according to any one of claims 1 to 9, characterized in that: The heater further includes a film temperature sensor, which includes a detection circuit and a detection head. The detection head is arranged inside the heating pipe, and the detection head can contact the heating film.

13. The heater according to claim 12, characterized in that The film temperature sensor further comprises an elastic element, the elastic element is an arc-shaped structure, and the two ends of the elastic element are winding ends formed by winding inward, and the elastic element is in contact with the heating film; The elastic element is provided with an opening, the detection head is located outside the elastic element, the detection circuit can pass through the opening, and the elastic element presses the detection head to fit the heating film.

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