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CN-121994490-A - Device and method for detecting anti-air-inlet liquid level of expansion tank of hybrid power cooling system

CN121994490ACN 121994490 ACN121994490 ACN 121994490ACN-121994490-A

Abstract

The invention discloses an anti-air-intake liquid level detection device of an expansion tank of a hybrid power cooling system, belongs to the technical field of automobile testing, and solves the problem that the anti-air-intake liquid level of the expansion tank is difficult to detect independently at present. The device comprises an expansion tank, a controller and a liquid storage tank, wherein a first degassing connecting pipe and a second degassing connecting pipe which are arranged in parallel are arranged between the liquid storage tank and the expansion tank, a first flowmeter, a first valve and a first driving pump are respectively arranged on the first degassing connecting pipe, a second flowmeter, a second valve and a second driving pump are respectively arranged on the second degassing connecting pipe, a water supplementing pipe and a water draining valve are respectively arranged at the bottom of the expansion tank, the water supplementing pipe is communicated with the liquid storage tank, and a third flowmeter, a third valve, an observation window and a third driving pump are sequentially arranged on the water supplementing pipe along one end of the liquid storage tank. The invention also discloses a method for detecting the anti-air-intake liquid level of the expansion tank of the hybrid power cooling system, which realizes the detection of the anti-air-intake performance of a single part of the expansion tank.

Inventors

  • ZHANG BO
  • LU JINGDONG
  • WENG YANFEI
  • LI WENJUN

Assignees

  • 广西玉柴机器股份有限公司

Dates

Publication Date
20260508
Application Date
20251231

Claims (10)

  1. 1. The utility model provides an anti liquid level detection device that admits air of hybrid cooling system expansion tank, includes expansion tank (1), expansion tank (1) top be equipped with filler (2), its characterized in that still includes controller (3) and liquid storage pot (4), liquid storage pot (4) and expansion tank (1) between be equipped with first degassing connection pipe (5) and second degassing connection pipe (6) of arranging side by side, the both ends of first degassing connection pipe (5) and second degassing connection pipe (6) all communicate with liquid storage pot (4) bottom, expansion tank (1) upper portion respectively, first degassing connection pipe (5) on install first flowmeter (7), first valve (8) and first driving pump (9) respectively, second degassing connection pipe (6) on install second flowmeter (10), second valve (11) and second driving pump (12) respectively, the bottom of expansion tank (1) install moisturizing pipe (13) and drain pipe (14) respectively, water valve (13) and liquid storage pot (4) bottom, expansion tank (1) upper portion intercommunication respectively, first degassing connection pipe (5) on install first flowmeter (8) and first driving pump (9) on third flowmeter (17), third driving pump (16) along third flowmeter (17) and third driving pump (12) on the third flowmeter (13) in proper order The first valve (8), the first driving pump (9), the second flowmeter (10), the second valve (11), the second driving pump (12), the third flowmeter (15), the third valve (16), the third driving pump (18) and the water drain valve (14) are electrically connected with the controller (3).
  2. 2. The device for detecting the anti-intake liquid level of the expansion tank of the hybrid cooling system according to claim 1, wherein a plugging cover (19) is arranged on the filling port (2) in a threaded manner.
  3. 3. The device for detecting the air inlet resistance liquid level of the expansion tank of the hybrid cooling system according to claim 1, wherein a first pressure sensor (20) is further installed on the expansion tank (1), and the first pressure sensor (20) is electrically connected with the controller (3).
  4. 4. The device for detecting the air inlet resistance liquid level of the expansion tank of the hybrid cooling system according to claim 1, wherein a second pressure sensor (21) is further installed on the water supplementing pipe (13) between the third flowmeter (15) and the expansion tank (1), and the second pressure sensor (21) is electrically connected with the controller (3).
  5. 5. A hybrid cooling system expansion tank anti-intake liquid level detection device according to claim 3, wherein a filter (22) is mounted on the first degassing connection pipe (5) between the first driving pump (9) and the liquid storage tank (4) and on the second degassing connection pipe (6) between the second driving pump (12) and the liquid storage tank (4).
  6. 6. The device for detecting the air inlet resistance liquid level of the expansion tank of the hybrid cooling system according to any one of claims 1 to 5, further comprising a support (23) and a linear driver (24), wherein the support (23) and the linear driver (24) are both positioned between the water supplementing pipe (13) and the water drain valve (14), the expansion tank (1) is hinged at the top of the support (23), one end of the linear driver (24) is hinged with the support (23), the other end of the linear driver is hinged with the bottom of the expansion tank (1), and the linear driver (24) is electrically connected with the controller (3).
  7. 7. The device for detecting the air inlet resistance liquid level of the expansion tank of the hybrid cooling system according to claim 6, wherein a bracket (25) is further arranged at the bottom of the expansion tank (1) between the water supplementing pipe (13) and the water drain valve (14), and the top of the bracket (23) and the other end of the linear driver (24) are hinged with the bottom of the bracket (25).
  8. 8. A method of detecting an intake air resistance level detection device of an expansion tank of a hybrid cooling system according to claim 6, comprising the steps of: S1, a first flowmeter (7), a first valve (8), a first driving pump (9), a second flowmeter (10), a second valve (11), a second driving pump (12), a third flowmeter (15), a third valve (16) and a third driving pump (18) are controlled to be opened through a controller (3); S2, according to flow data or CAE cooling system simulation calculation data in a target vehicle use state, opening degrees of a first valve (8), a second valve (11) and a third valve (16) are adjusted, so that flow values of the first flowmeter (7), the second flowmeter (10) and the third flowmeter (15) are consistent with flow values in the target vehicle use state; S3, adding water through a filling port (2) until the liquid level in the expansion tank (1) rises to a MAX line; S4, opening a water drain valve (14) through a controller (3) to drain water, observing the fluid state of an observation window (17), and closing the water drain valve (14) until bubbles appear in the observation window (17); S5, closing the first driving pump (9), the second driving pump (12), the third driving pump (18), the first valve (8), the second valve (11) and the third valve (16), and recording the liquid level position in the expansion water tank (1) at the moment after the liquid level in the expansion water tank (1) is stable, wherein the liquid level of the expansion water tank (1) is the anti-air inlet liquid level of the expansion water tank (1).
  9. 9. The detection method according to claim 8, wherein the liquid level lowering speed of the expansion tank (1) is less than or equal to 0.5mm/s when the drain valve (14) drains water.
  10. 10. The method according to claim 8, further comprising step S0, wherein step S0 is performed before step S1, and the specific operation procedure of step S0 is as follows: the controller (3) starts the linear driver (24), and the linear driver (24) stretches and contracts to drive the expansion water tank (1) to incline until the inclination angle of the expansion water tank (1) is the same as that of the use state of the target vehicle.

Description

Device and method for detecting anti-air-inlet liquid level of expansion tank of hybrid power cooling system Technical Field The invention relates to the technical field of automobile testing, in particular to an anti-air-inlet liquid level detection device and method for an expansion tank of a hybrid power cooling system. Background In a hybrid vehicle, a positive pressure cooling circulation system is a relatively important circulation system. The expansion water tank is used as an important part in the positive pressure cooling circulation system and has the functions of replenishing liquid, pressurizing and separating gas. The expansion tank is typically arranged at the highest point of the engine, and the water replenishment is located at the lowest point of the expansion tank. In the working process, when the liquid level of the cooling liquid in the expansion water tank is lower, and the cooling liquid in the expansion water tank is introduced into the engine through the through-hole-shaped large-caliber water outlet and the connecting pipeline, the flow speed of the cooling liquid in the air cavity area in the expansion water tank is larger when the cooling liquid flows to the water outlet, and the cooling liquid in the expansion water tank can possibly generate vortex at the water outlet to wind air into the water pump inlet. Therefore, in actual use, the minimum liquid level of the air involved in the cooling system is generally required to be confirmed, so that the influence on the working efficiency of a water pump, a heat exchanger or other accessories in the cooling system due to the fact that the system is involved in a large amount of air is avoided, and the service life of the whole vehicle is further influenced. But no related device for independently detecting the anti-intake liquid level of the expansion tank exists at present. Therefore, there is a need to develop and design a device and a method for detecting the anti-intake liquid level of an expansion tank of a hybrid cooling system to solve the above-mentioned problems. Disclosure of Invention The invention aims to solve the technical problems in the prior art, and aims to provide an anti-air-inlet liquid level detection device for an expansion tank of a hybrid power cooling system, so that the detection of the anti-air-inlet liquid level performance of the expansion tank in an independent part state is realized, the correction cost of unqualified verification after being matched with a finished automobile is reduced, and the safety risk brought by operation on the finished automobile is reduced. The invention aims to provide an anti-air-intake liquid level detection method for an expansion tank of a hybrid power cooling system, which is used for detecting the air-intake resistance of a single part of the expansion tank. In order to achieve the first aim, the invention provides an anti-air inlet liquid level detection device of an expansion tank of a hybrid power cooling system, which comprises an expansion tank, wherein a filling port is formed in the top of the expansion tank, the anti-air inlet liquid level detection device further comprises a controller and a liquid storage tank, a first degassing connecting pipe and a second degassing connecting pipe which are arranged in parallel are arranged between the liquid storage tank and the expansion tank, two ends of the first degassing connecting pipe and two ends of the second degassing connecting pipe are respectively communicated with the bottom of the liquid storage tank and the upper part of the expansion tank, a first flowmeter, a first valve and a first driving pump are respectively arranged on the first degassing connecting pipe, a second flowmeter, a second valve and a second driving pump are respectively arranged on the second degassing connecting pipe, a water supplementing pipe and a water draining valve are respectively arranged on the bottom of the expansion tank, the water supplementing pipe is communicated with the liquid storage tank, a third flowmeter, a third valve, a viewing window and a third driving pump are sequentially arranged on the water supplementing pipe along one end of the liquid storage tank, and the first flowmeter, the first valve, the first driving pump, the second flowmeter, the second valve, the second driving pump, the third valve, the third driving pump, the third flowmeter and the third driving pump are electrically connected with the third water draining valve. As a further improvement, a plugging cover is arranged on the filling port in a threaded manner. Further, a first pressure sensor is further installed on the expansion water tank, and the first pressure sensor is electrically connected with the controller. Further, a second pressure sensor is further installed on the water replenishing pipe between the third flowmeter and the expansion water tank, and the second pressure sensor is electrically connected with the controller. Further, a f