High-pressure liquid heater

Abstract

The utility model discloses a high-pressure liquid heater which comprises a main shell and a bottom cover, a plurality of working medium flow channels are correspondingly arranged on the bottom cover and the main shell, the working medium flow channels are communicated with one another, a heating element is arranged in each working medium flow channel, and hoops are arranged between the heating elements and the working medium flow channels in a matched mode. The main shell is further provided with a working medium inlet and a working medium outlet, and the working medium inlet and the working medium outlet communicate with the working medium flow channels at the head end and the tail end correspondingly. The plurality of working medium flow channels are formed by encircling the bottom cover and the main shell at one time, the liquid working medium flows in from the head end and flows out from the tail end, the design not only ensures the single heat absorption stroke length of the liquid working medium, but also greatly facilitates the disassembly, assembly and maintenance of the heater, and all the working medium flow channels and heating elements can be inspected through one-time disassembly; in addition, the heating element is effectively fixed through the hoop, collision between the heating element and the working medium flow channel caused by vibration in the vehicle running process is avoided, and the damage rate of the heating element is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the field of vehicle thermal management devices, and particularly relates to a high-pressure liquid heater. Background Art

[0002] The heating equipment supporting the battery pack is part of the thermal management system of new energy vehicles. Its basic working principle is to heat the liquid working medium through high-voltage heating elements and then generate a heat exchange through a partition wall with the vehicle battery pack, so as to maintain the normal working temperature of the battery pack under specific conditions. The existing high-pressure liquid heaters generally adopt the design of multiple independent heating chambers, with a large overall disassembly and assembly workload, which is rather troublesome. Moreover, the single heating stroke of the working medium is short, which is not conducive to the sufficient heat absorption and temperature rise of the working medium. In addition, the existing heating elements lack effective positioning, and the vibration generated during vehicle operation is likely to have an adverse impact on them, thereby increasing the failure rate and maintenance frequency, and there is great room for improvement. Content of the Utility Model

[0003] Aiming at the problems existing in the background art, the purpose of the utility model is to provide a high-pressure liquid heater, which effectively solves the problems existing in the background art.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The high-pressure liquid heater includes a main housing and a bottom cover detachably arranged on the main housing. A plurality of working medium flow channels are correspondingly arranged on the bottom cover and the main housing, and the plurality of working medium flow channels are interconnected. Heating elements are respectively arranged in each working medium flow channel. One end of the heating element is detachably arranged on the main housing, and a clamp is also arranged in cooperation between the heating element and the working medium flow channel. A working medium inlet and a working medium outlet are also arranged on the main housing, and the working medium inlet and the working medium outlet are respectively communicated with the working medium flow channels at the head and tail ends.

[0006] Further, the bottom cover is connected to the main housing through a plurality of bottom cover fastening screws, and a sealing gasket is also arranged in cooperation between the bottom cover and the main housing.

[0007] Further, the heating element is an electric heating tube. One end of the electric heating tube has a flange and a wiring head. The flange is connected to the main housing through a plurality of flange fastening screws, and a sealing ring is also arranged in cooperation between the flange and the main housing. A ceramic column is sleeved on the wiring head.

[0008] Further, the sealing ring includes a radial sealing ring and an axial sealing ring.

[0009] Furthermore, the main shell is also provided with a circuit board, an inlet temperature sensor, an outlet temperature sensor and a heating element temperature sensor, and the circuit board is provided with an electrical quick-plug female connector electrically connected to the terminal head; the inlet temperature sensor and the outlet temperature sensor are respectively arranged at the working fluid inlet and the working fluid outlet; the heating element temperature sensor is arranged on one of the working fluid flow channels and is in contact with the electric heating tube in this working fluid flow channel.

[0010] Furthermore, the clamp includes an outer claw, an inner claw and a positioning clamp, and the number of the outer claws and the inner claws are both multiple, and the outer claws and the inner claws respectively fit the inner ring and the outer ring of the electric heating tube; the number of the positioning clamp is at least one, and the positioning clamp is fixed on the outer claw and clamps the electric heating tube.

[0011] Furthermore, the outer claw has a bending portion, and the bending portion has a protrusion that matches the inner wall of the working medium flow channel.

[0012] The utility model has the following beneficial technical effects:

[0013] The multiple working fluid flow channels in the utility model are formed by the bottom cover and the main shell body at one time. The multiple working fluid flow channels are interconnected, and the liquid working fluid flows in from the head end and flows out from the tail end. This design not only ensures the single heat absorption stroke length of the liquid working fluid, but also greatly facilitates the disassembly and maintenance of the heater. All working fluid flow channels and heating elements can be inspected by disassembly at one time. In addition, the heating element in the present application is effectively fixed by a clamp, which avoids the collision between the heating element and the working fluid flow channel caused by vibration during the operation of the vehicle, significantly reduces the damage rate of the heating element, and is conducive to improving and enhancing the user experience. The present application is novel in design, stable and safe in operation, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0015] Figure 2 An exploded view of an embodiment of the utility model;

[0016] Figure 3 A top view of an embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the overall structure of the electric heating tube in the embodiment of the utility model;

[0018] Figure 5 This is a schematic diagram of the overall structure of the clamp in the embodiment of the utility model;

[0019] Figure 6 It is a schematic diagram of the assembly structure of the electric heating tube and the main shell in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0021] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] As Figure 1-6 shown, the high-pressure liquid heater described in this embodiment includes a main housing 1 and a bottom cover 2 detachably arranged on the main housing 1. Specifically, the bottom cover 2 is connected to the main housing 1 through a plurality of bottom cover fastening screws. A sealing gasket 3 is also provided in cooperation between the bottom cover 2 and the main housing 1. Four working fluid channels 4 are correspondingly arranged on the bottom cover 2 and the main housing 1. The four working fluid channels 4 are interconnected through a communication port 5. Heating elements 6 are respectively arranged in each working fluid channel 4. One end of the heating element 6 is detachably arranged on the main housing 1. Specifically, the heating element 6 is an electric heating tube. One end of the electric heating tube has a flange 7 and a terminal 8. The main body of the electric heating tube is a spiral coil. The flange 7 is connected to the main housing 1 through a plurality of flange fastening screws. A sealing ring is also provided in cooperation between the flange 7 and the main housing 1. The sealing ring includes a radial sealing ring 9 and an axial sealing ring 10. A ceramic column 23 is sleeved on the terminal. It is assembled on the heating element 6 through a high-temperature resistant insulating glue. The ceramic column 23 can increase the electrical clearance and creepage distance, so that the heating element 6 can be used under high DC voltage. A clamp 11 is also provided in cooperation between the heating element 6 and the working fluid channel 4. A working fluid inlet 12 and a working fluid outlet 13 are also arranged on the main housing 1. The working fluid inlet 12 and the working fluid outlet 13 are respectively communicated with the working fluid channels 4 at the head and tail ends.

[0023] The main shell 1 is also provided with a circuit board 14, an inlet temperature sensor 15, an outlet temperature sensor 16 and a heating element temperature sensor 17. The circuit board 14 is provided with an electrical quick-plug female connector 18 electrically connected to the terminal head 8, such as a banana socket. The terminal head 8 is an electrical quick-plug male connector such as a banana plug, which can realize quick-disconnect wiring between the circuit board 14 and the electric heating tube, and is convenient for power supply connection and power-off disassembly of the electric heating tube; the inlet temperature sensor 15 and the outlet temperature sensor 16 are respectively arranged at the working fluid inlet 12 and the working fluid outlet 13, and the collection ends of the inlet temperature sensor 15 and the outlet temperature sensor 16 are respectively extended into the working fluid inlet 12 and the working fluid outlet 13; the heating element temperature sensor 17 is arranged on one of the working fluid flow channels 4 and contacts the electric heating tube in this working fluid flow channel 4.

[0024] The clamp 11 comprises an outer claw 19, an inner claw 20 and a positioning clip 21 which are fixed together. The outer claws 19 are four in number and the inner claws 20 are two in number. The outer claws 19 and the inner claws 20 are respectively fitted with the inner ring and the outer ring of the electric heating tube. The outer claw 19 has a bending portion, and the bending portion has a protrusion 22 which matches the inner wall of the working fluid flow channel 4. The outer claw 19 is interference fit with the working fluid flow channel 4, and the inner claw 20 also has a bending portion. The inner claw 20 clamps the inner ring of the electric heating tube to form a gripping force. The number of the positioning clip 21 is at least one. The positioning clip 21 is fixed on the outer claw 19 and clamps the electric heating tube. The function of the positioning clip 21 is to realize the assembly positioning of the clamp 11 and the electric heating tube.

[0025] When assembling this embodiment, first assemble the clamp 11 and the electric heating tube into place, then fix each electric heating tube to the main shell 1, then buckle the bottom cover 2 and fix it, and finally install the circuit board 14, the inlet temperature sensor 15, the outlet temperature sensor 16 and the heating element temperature sensor 17; compared with the prior art, the multiple working fluid flow channels 4 in this embodiment are formed by the bottom cover 2 and the main shell 1 at one time, and the multiple working fluid flow channels 4 are interconnected, and the liquid working fluid flows in from the head end and flows out from the tail end. This design not only ensures the single heat absorption stroke length of the liquid working fluid, but also greatly facilitates the disassembly and maintenance of the heater. All the working fluid flow channels 4 and the electric heating tubes can be inspected by disassembling once; in addition, the electric heating tube in this embodiment is effectively fixed by the clamp 11, which avoids the collision between the electric heating tube and the working fluid flow channel 4 caused by vibration during the operation of the vehicle, significantly reduces the damage rate of the electric heating tube, and is conducive to improving and enhancing the user experience.

[0026] The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the present utility model and its practical applications, and to enable those of ordinary skill in the art to understand the present utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A high pressure liquid heater, characterized in that: It includes a main shell and a bottom cover detachably arranged on the main shell, wherein a plurality of working fluid flow channels are correspondingly arranged on the bottom cover and the main shell, and the plurality of working fluid flow channels are interconnected, and a heating element is arranged in each working fluid flow channel, and one end of the heating element is detachably arranged on the main shell, and a clamp is also arranged between the heating element and the working fluid flow channel; a working fluid inlet and a working fluid outlet are also arranged on the main shell, and the working fluid inlet and the working fluid outlet are respectively connected to the working fluid flow channels at the head and tail ends.

2. The high pressure liquid heater according to claim 1, characterized in that: The bottom cover is connected to the main shell through a plurality of bottom cover fastening screws, and a sealing gasket is also arranged between the bottom cover and the main shell.

3. The high pressure liquid heater according to claim 1, characterized in that: The heating element is an electric heating tube, one end of which is provided with a flange and a terminal. The flange is connected to the main shell through a plurality of flange fastening screws, and a sealing ring is also provided between the flange and the main shell; a ceramic column is provided on the terminal.

4. The high pressure liquid heater according to claim 3, characterized in that: The sealing ring comprises a radial sealing ring and an axial sealing ring.

5. The high pressure liquid heater according to claim 3, characterized in that: The main shell is also provided with a circuit board, an inlet temperature sensor, an outlet temperature sensor and a heating element temperature sensor; the circuit board is provided with an electrical quick-plug female connector electrically connected to the terminal head; the inlet temperature sensor and the outlet temperature sensor are respectively arranged at the working fluid inlet and the working fluid outlet; the heating element temperature sensor is arranged on one of the working fluid flow channels and is in contact with the electric heating tube in this working fluid flow channel.

6. The high pressure liquid heater according to claim 3 or 5, characterized in that: The clamp includes an outer claw, an inner claw and a positioning clamp. The outer claw and the inner claw are both multiple in number, and the outer claw and the inner claw respectively fit the inner ring and the outer ring of the electric heating tube; the positioning clamp is at least one in number, and the positioning clamp is fixed on the outer claw and clamps the electric heating tube.

7. The high pressure liquid heater according to claim 6, characterized in that: The outer claw is provided with a bending portion, and the bending portion is provided with a protrusion matched with the inner wall of the working medium flow channel.

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