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CN-122008789-A - Multi-channel heat exchange tube assembly for automobile air conditioner and dynamic heat management method

CN122008789ACN 122008789 ACN122008789 ACN 122008789ACN-122008789-A

Abstract

The invention discloses a multi-channel heat exchange tube assembly for an automobile air conditioner and a dynamic heat management method, which belong to the technical field of automobile air conditioner heat exchange, integrate multi-channel heterogeneous integrated heat exchange tube assemblies for circulating refrigerant, motor cooling liquid and battery cooling liquid in the vertical direction, integrate two groups of independently controllable built-in heat exchange units respectively used for heat exchange of motor liquid-refrigerant and motor liquid-battery liquid in the inside of a collecting tube connected with each layer of flat tube, realize the physical integration of three functions of air conditioner condensation/evaporation, battery heat dissipation/heating and motor heat dissipation/waste heat recovery into one compact module, solve the fundamental problems of space, weight and complexity on the one hand, and create an efficient, multidirectional and controllable heat transfer path on the other hand by using a built intelligent and reconfigurable hardware platform of a heat flow path.

Inventors

  • ZHAI LIHUA
  • ZHU BING
  • XU JIABAO
  • HUANG QINFANG
  • SHEN PING
  • LIU SHENGXU

Assignees

  • 广西职业技术学院
  • 南宁市安和机械设备有限公司

Dates

Publication Date
20260512
Application Date
20260226

Claims (9)

  1. 1. A multi-channel heat exchange tube assembly for an automobile air conditioner comprises a first collecting tube (1) and a second collecting tube (2) which are arranged at intervals in parallel, and is characterized in that a plurality of layers of micro-channel flat tube structures (3) are stacked between the two tubes along the length direction of the two tubes, a plurality of independent fluid chambers which correspond to and are communicated with the micro-channel flat tube structures (3) in position are respectively separated from the inside of the first collecting tube (1) and the inside of the second collecting tube (2) through middle separation plates (6), the upper and lower layers of micro-channel flat tube structures (3) and the corresponding independent fluid chambers form a first fluid channel, a second fluid channel and a third fluid channel which are isolated from each other, and the first fluid channel, the second fluid channel and the third fluid channel are respectively used for circulating different cooling mediums; The microchannel flat tube structure (3) comprises a plurality of flat tubes (31) and a plurality of microchannels (32) arranged in the flat tubes (31), wherein radiating fins (4) extending outwards horizontally are embedded and arranged on the upper end face and the lower end face of each microchannel (32); an inner heat exchange space is reserved between the upper and lower adjacent independent fluid chambers, a pair of inner heat exchange spaces are distributed above and below the second fluid channel, and a pair of inner heat exchange spaces are integrally provided with a built-in heat exchange unit (7) which is respectively used for carrying out non-mixed conveying heat exchange on the upper and lower cooling mediums.
  2. 2. The multi-channel heat exchange tube assembly for an automobile air conditioner of claim, wherein said first, second and third fluid channels are respectively used for circulating a refrigerant, a motor coolant and a battery coolant.
  3. 3. The multi-channel heat exchange tube assembly for the automobile air conditioner according to claim 1, wherein the upper end face and the lower end face of the micro-channel (32) are provided with a plurality of heat dissipation grooves (33) extending along the length direction of the micro-channel, the plurality of heat dissipation grooves (33) are internally provided with vertical heat dissipation holes (34) extending along the thickness direction of the tube wall of the flat tube (31) and staggered with the micro-channel (32), and the opposite surface of the heat dissipation fins (4) and the flat tube (31) is provided with a heat conduction connection layer (401) embedded in the heat dissipation grooves (33).
  4. 4. The multi-channel heat exchange tube assembly for an automobile air conditioner according to claim 1, wherein two ends of the first fluid channel, the second fluid channel and the third fluid channel are respectively provided with a medium communicating tube (8) externally connected with corresponding independent flow chambers, the medium communicating tubes (8) are respectively communicated with a cooling medium external circulation system, a motor cooling pump and a motor loop flow control valve are arranged on the medium communicating tube (8) where the second fluid channel is located, and a battery cooling pump and a battery loop flow control valve are arranged on the medium communicating tube (8) where the third fluid channel is located.
  5. 5. The multi-channel heat exchange tube assembly for an automobile air conditioner according to claim 4, wherein the medium communicating tube (8) of the first fluid channel is connected to the heat pump circulation loop of the automobile air conditioner through a four-way reversing valve, and the other interfaces of the four-way reversing valve are respectively connected with the compressor, the indoor heat exchanger and the expansion valve, so that the first fluid channel can be selectively configured as a condenser or an evaporator.
  6. 6. The multi-channel heat exchange tube assembly for the automobile air conditioner according to claim 5, wherein the built-in heat exchange unit (7) comprises a U-shaped heat exchange plate (71) integrally installed in an inner heat exchange space, two ends of the U-shaped heat exchange plate (71) are respectively provided with an outer heat exchange inlet tube (711) and an outer heat exchange outlet tube (712), the U-shaped heat exchange plate (71) is internally embedded with a U-shaped heat exchange tube (72) which is reversely arranged with the U-shaped heat exchange plate, a heat exchange cavity (713) corresponding to the position of the U-shaped heat exchange tube (72) is formed in the outer heat exchange inlet tube (711), and two ends of the U-shaped heat exchange tube (72) respectively penetrate through the U-shaped heat exchange plate (71) and are provided with an inner heat exchange inlet tube (721) and an inner heat exchange outlet tube (722); The upper and lower inner heat exchange inlet pipes (721) are respectively provided with a first unit control valve and a second unit control valve, and the upper and lower outer heat exchange inlet pipes (711) are respectively provided with a third unit control valve and a fourth unit control valve for controlling the on-off and the flow of fluid flowing through the built-in heat exchange units (7).
  7. 7. The multi-channel heat exchange tube assembly for an automobile air conditioner according to claim 6, wherein the outer heat exchange inlet tubes (711) and the outer heat exchange outlet tubes (712) on the built-in heat exchange unit (7) respectively penetrate through the upper independent flow chamber and the lower independent flow chamber, the inner heat exchange inlet tubes (721) and the inner heat exchange outlet tubes (722) on the built-in heat exchange unit (7) respectively penetrate through the independent flow chambers in the middle, and the outer heat exchange outlet tubes (712) are respectively connected with the medium communicating tubes (8) corresponding to the positions.
  8. 8. A dynamic thermal management method of a multi-channel heat exchange tube assembly for an automobile air conditioner, adopting the multi-channel heat exchange tube assembly for an automobile air conditioner as defined in any one of claims 1 to 7, comprising the following steps: S1, judging a thermal management mode, namely judging a current required thermal management mode according to a vehicle working condition signal, an environment temperature, a battery temperature, a motor temperature and a passenger cabin demand temperature, wherein the thermal management mode at least comprises a dual-source heat pump heating mode, a battery active preheating mode and a high-efficiency parallel heat dissipation mode; S2, generating and executing instructions, namely generating a corresponding control instruction set according to the judged thermal management mode and issuing the control instruction set to each executing mechanism; controlling a four-way reversing valve to enable a first fluid channel to serve as an evaporator, starting a motor cooling pump and a motor loop flow control valve, and starting a first unit control valve and a third unit control valve to enable motor waste heat to be transmitted to a refrigerant through a built-in heat exchange unit (7) above; For the active battery preheating mode, when the temperature of the battery is lower than a preset first threshold value and the temperature of the motor is higher than a second threshold value, starting a battery cooling pump, a motor cooling pump and corresponding loop flow control valves thereof, and starting a second unit control valve and a fourth unit control valve to enable the motor waste heat to be transmitted to battery cooling liquid through a built-in heat exchange unit (7) below; And in the efficient parallel heat dissipation mode, the four-way reversing valve is controlled to enable the first fluid channel to serve as a condenser, the battery cooling pump and the battery loop flow control valve are simultaneously opened, the first unit control valve and the second unit control valve are closed, so that the refrigerant and the battery cooling liquid dissipate heat to the ambient air in parallel through the heat dissipation fins (4), and the waste heat uploading of the motor is blocked.
  9. 9. The method for dynamic heat management of a multi-channel heat exchange tube assembly for an automotive air conditioner of claim 8, wherein in the efficient parallel heat dissipation mode, if the motor temperature is detected to exceed a safety threshold, a motor cooling pump and a motor loop flow control valve are started, so that motor cooling liquid flows through the second fluid channel and dissipates heat through a heat dissipation fin (4), and simultaneously the first unit control valve and the second unit control valve are kept closed; in the dual-source heat pump heating mode, if the motor waste heat is insufficient, the second unit control valve is controlled to be partially opened or pulse control is adopted, so that part of motor waste heat flows to the battery cooling liquid for heat preservation.

Description

Multi-channel heat exchange tube assembly for automobile air conditioner and dynamic heat management method Technical Field The invention relates to the field of heat exchange of automobile air conditioners, in particular to a multi-channel heat exchange tube assembly for an automobile air conditioner. Background Along with the rapid development of new energy automobiles, the complexity and the importance of a whole automobile thermal management system are increasingly remarkable, and compared with a traditional fuel oil automobile, the thermal management of an electric automobile and a hybrid electric automobile is required to comprehensively coordinate a plurality of requirements of refrigerating/heating of an air conditioner of a passenger cabin, precise temperature control of a power battery, waste heat recovery and heat dissipation of high-voltage components such as a motor/electric control and the like. Currently, the mainstream whole vehicle heat management scheme mainly adopts a plurality of independent heat exchangers (such as an air conditioner condenser, an evaporator, a battery cooler Chiller, a motor radiator, a warm air core body and the like) to be connected through pipelines, so as to form a relatively discrete heat exchange network. In order to improve the integration level and energy efficiency of the system, the prior art has explored that, as disclosed in patent document CN117656774A, an outdoor heat exchanger of an automobile air conditioner is designed by adopting a nested flat tube (an inner flat tube sleeve and an outer flat tube), double refrigerant flow channels are formed in a single component, the supercooling degree is regulated in a refrigerating mode by the cooperation of the inner flow channels, the frosting of an outer tube is prevented by utilizing the heat of the inner tube in a heating mode, and the performance of the heat pump air conditioner under extreme working conditions is optimized. However, the scheme is still 'homogeneous fluid (all are refrigerants) optimization' in the air conditioning system, the runner design is special for refrigerant circulation, heterogeneous fluid loops such as battery cooling liquid and motor cooling liquid are not physically integrated, so that the deep coordination problem of the air conditioning system, a battery and motor thermal management system cannot be solved, the thermal management strategy is localized and static, and a global optimization control method which is based on whole-vehicle thermal state prediction and can coordinate multi-channel heat flow and multi-mode switching is lacking. Therefore, an integrated solution with high integration and dynamically changeable functions and capable of implementing intelligent collaborative thermal management is needed, and a multichannel heat exchange tube assembly and a dynamic heat management method for an automobile air conditioner are proposed at present, which are intelligently controllable on a heat flow path through deep integration of a physical hardware layer, so that the comprehensive utilization efficiency of the whole automobile energy is improved. Disclosure of Invention The invention aims to solve the problems, and provides the multi-channel heat exchange tube assembly for the automobile air conditioner, which is used for improving the comprehensive utilization efficiency of the energy of the whole automobile through the deep integration of physical hardware layers and intelligent and controllable heat flow paths. In order to achieve the above object, the present invention adopts the following technical scheme: According to one aspect of the invention, a multi-channel heat exchange tube assembly for an automobile air conditioner is provided, the multi-channel heat exchange tube assembly comprises a first collecting tube and a second collecting tube which are arranged in parallel at intervals, a plurality of layers of micro-channel flat tube structures are stacked between the two tubes along the length direction of the multi-channel heat exchange tube assembly, a plurality of independent fluid chambers which correspond to and are communicated with the positions of the micro-channel flat tube structures are respectively separated from each other by a middle partition plate in the first collecting tube and the second collecting tube, the upper and lower multi-layer micro-channel flat tube structures and the corresponding independent fluid chambers form a first fluid channel, a second fluid channel and a third fluid channel which are isolated from each other, and the first fluid channel, the second fluid channel and the third fluid channel are respectively used for circulating different cooling mediums; the microchannel flat tube structure comprises a plurality of flat tubes and a plurality of microchannels arranged in the flat tubes, wherein radiating fins extending outwards horizontally are embedded and arranged on the upper end face and the lower end face of each microch