CN115077931A - Automobile heat dissipation performance testing device - Google Patents

Abstract

The invention discloses an automobile heat dispersion performance testing device which comprises a first vertical plate, a second vertical plate, a low-temperature tank and the like, wherein the first vertical plate is provided with a plurality of first vent holes, the second vertical plate is provided with a plurality of second vent holes, cooling liquid is filled in the low-temperature tank, a plurality of inclined pipes are arranged in the low-temperature tank, the first vent holes are communicated with the top ends of the inclined pipes, the second vent holes are communicated with the side walls of the lower parts of the inclined pipes, the first vent holes, the inclined pipes and the second vent holes are communicated in a one-to-one correspondence mode, the side walls of the upper parts of the inclined pipes are provided with nozzles, the nozzles are communicated with a control valve, the control valve is communicated with a water pump, the water pump is arranged in the low-temperature tank, the lower ends of the inclined pipes are inserted into the cooling liquid in the low-temperature tank, and a thermometer is used for detecting the temperature in the low-temperature tank. The air circulation quantity required in the detection is small, the flow of the air flow passing through each part of the radiator is more uniform, the heat exchange between the air and the cooling liquid is sufficient, and the detection error is reduced.

Description

A vehicle heat dissipation performance test device

technical field

The invention relates to the technical field of automobile detection, in particular to an automobile heat dissipation performance testing device.

Background technique

The radiator belongs to the automobile cooling system. The radiator in the engine water cooling system consists of three parts: the water inlet chamber, the water outlet chamber, the main chip and the radiator core. The coolant flows inside the radiator core and the air passes outside the radiator core. The hot coolant cools by dissipating heat to the air, and the cold air heats up by absorbing the heat given off by the coolant, so the radiator is a heat exchanger. The heat dissipation performance of the car is determined by the heat dissipation performance of the radiator, so the heat dissipation performance of the radiator can be judged by detecting the heat dissipation performance of the radiator. In the prior art, the radiator is immersed in water, and the heat dissipation performance is judged by detecting the change of the water temperature. For air heat exchange, the above methods cannot accurately represent the heat dissipation performance of the radiator. It is also used to blow through the radiator by circulating air, and then heat the air to the coolant, and observe the temperature rise of the coolant to judge the heat dissipation performance of the radiator. However, due to the large area of the radiator, the air flow near the air outlet is large. , the air cannot flow through the radiator uniformly, and the required circulating air volume is large, and the heat exchange between the air and the cooling liquid is not sufficient, etc., resulting in large detection errors.

SUMMARY OF THE INVENTION

In view of the above-mentioned prior art, the present invention is to provide a vehicle heat dissipation performance test device, which requires less air circulation in the test, more uniform air flow through each part of the radiator, sufficient heat exchange between the air and the coolant, and reduces the detection error.

The technical scheme of the present invention is realized as follows:

An automobile heat dissipation performance testing device, comprising a first vertical plate, a second vertical plate, a low temperature tank, an inclined pipe, a water pump, a control valve, a thermometer and an incubator, the first vertical plate is provided with several first air holes, the second vertical plate is provided with a plurality of second air holes, the first vertical plate and the second vertical plate are separated by a preset distance and are parallel to each other, the low temperature tank is filled with cooling liquid, and a plurality of the The inclined pipe is arranged in the low temperature tank, the first ventilation hole is communicated with the top end of the inclined pipe, the second ventilation hole is communicated with the side wall of the lower part of the inclined pipe, the first ventilation hole, the inclined pipe The pipe and the second vent hole are in one-to-one correspondence, and the side wall of the upper part of the inclined pipe is provided with a nozzle, the nozzle communicates with the control valve, the control valve communicates with the water pump, and the water pump is provided in the In the low temperature tank, the lower end of the inclined tube is inserted into the cooling liquid of the low temperature tank, the thermometer is used to detect the temperature in the low temperature tank, the first vertical plate, the second vertical plate, the low temperature tank, the inclined Pipes, water pumps, control valves and thermometers are installed in the incubator.

Further, the angle between the water spraying direction of the nozzle and the inclined pipe is 10-45 degrees, and the angle between the inclined pipe and the horizontal plane is 30-60 degrees.

Further, the refrigerating liquid is water, and the inner wall of the inclined tube is coated with a hydrophobic layer.

Further, a buffer tank is communicated with the inclined pipe above the liquid, and the top of the buffer tank is communicated with the second vent hole through a pipe.

Further, the control valve is a solenoid valve, the solenoid valve is signally connected to a controller, and the controller controls the solenoid valve to open and close periodically.

Further, the nozzle includes an outer casing, a movable block and a spring, the outer casing is provided with a first cavity and a second cavity, and the side wall of the inclined tube is provided with an opening communicating with the first cavity and an opening connected with the first cavity. For the annular seam connected to the second cavity, the diameter of the opening is 0.5 to 1 times the inner diameter of the inclined pipe, the width of the annular seam is 0.2 to 1 mm, and the water outlet direction of the annular seam is toward the The lower end of the inclined tube, the movable block and the spring are arranged in the first cavity, the movable block is rotatably connected with the inner wall of the first cavity, and the two ends of the spring are connected with the movable block and the first cavity. In the inner wall of the cavity, the movable block covers part of the flow channel of the first cavity in a natural state, and when the liquid flows through the first cavity, the movable block is pushed to cover the opening.

Further, the annular slot is C-shaped, and the annular slot surrounds the lower end and both sides of the inclined tube.

Further, the first cavity surrounds the inclined tube.

The beneficial effect of the invention is that: using the water column formed by the cooling liquid in the inclined pipe to push the air flow, not only can the air flow in each area of the automobile radiator be the same, but also the cooling liquid can be fully contacted with the air in the process of promoting the air flow, and the air is not affected. It cools down and fully absorbs energy, and it is more accurate to observe the heat dissipation performance according to the coolant temperature. The amount of air circulating in the whole detection device is small, and the heat absorbed by the temperature change of the air is small, which reduces the error of the small temperature rise of the cooling liquid caused by the air absorbing part of the heat. The incubator can avoid the heat exchange between the air and coolant inside and the outside, and reduce the error of detection.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only preferred embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1 is a schematic structural diagram of a vehicle heat dissipation performance testing device according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of a nozzle of a vehicle heat dissipation performance testing device according to Embodiment 2 of the present invention;

Fig. 3 is A-A sectional structure schematic diagram in Fig. 2;

In the figure, 1 first vertical plate, 2 second vertical plate, 3 low temperature tank, 4 inclined pipe, 5 water pump, 6 control valve, 7 thermometer, 8 incubator, 9 first vent hole, 10 second vent hole , 11 nozzles, 12 buffer tanks, 13 controllers, 14 outer casings, 15 movable blocks, 16 springs, 17 first chambers, 18 second chambers, 19 openings, 20 annular slits.

Detailed ways

In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described with reference to the accompanying drawings.

Example 1

Referring to FIG. 1, an automobile heat dissipation performance test device includes a first vertical plate 1, a second vertical plate 2, a low temperature tank 3, an inclined pipe 4, a water pump 5, a control valve 6, a thermometer 7 and an incubator 8, so The first vertical plate 1 is provided with a plurality of first ventilation holes 9, the second vertical plate 2 is provided with a plurality of second ventilation holes 10, and the first vertical plate 1 and the second vertical plate 2 are spaced at a predetermined distance. Set distances and are parallel to each other, the cryogenic tank 3 is filled with cooling liquid, a plurality of the inclined pipes 4 are arranged in the low temperature tank 3, the first ventilation hole 9 is communicated with the top of the inclined pipe 4, the The second ventilation hole 10 is in communication with the side wall of the lower part of the inclined pipe 4 , the first ventilation hole 9 , the inclined pipe 4 and the second ventilation hole 10 are in one-to-one correspondence, and the side wall of the upper part of the inclined pipe 4 is provided with Nozzle 11, the nozzle 11 communicates with the control valve 6, the control valve 6 communicates with the water pump 5, the water pump 5 is set in the low temperature tank 3, and the lower end of the inclined pipe 4 is inserted into the low temperature tank 3, the thermometer 7 is used to detect the temperature in the low temperature tank 3, the first vertical plate 1, the second vertical plate 2, the low temperature tank 3, the inclined pipe 4, the water pump 5, the control A valve 6 and a thermometer 7 are installed in the incubator 8 .

The first ventilation hole 9 runs through both sides of the first vertical plate 1, and the second ventilation hole 10 runs through both sides of the second vertical plate 2. The first ventilation hole 9, the inclined pipe 4 and the second ventilation hole 10 are one One-to-one communication, when the amount of air flowing in different inclined tubes 4 is the same, the amount of air flowing through the first ventilation hole 9 and the second ventilation hole 10 is also the same. The first vertical plate 1 and the second vertical plate 2 are separated by a preset distance and are parallel to each other, and the automobile fan heater that needs to be tested for heat dissipation performance is placed between the first vertical plate 1 and the second vertical plate 2, When the air flows between the first air hole 9 and the second air hole 10, the air flows through the automobile radiator, thereby removing the heat of the automobile radiator. When the different first air holes 9 and the second air holes 10 pass the same amount of air, the air flow through each area of the car radiator is the same, the heat dissipation in each area of the car radiator is uniform, and the detection structure can fully characterize the car The heat dissipation performance of the radiator. The low-temperature tank 3 is filled with cooling liquid, and the cooling liquid can be low-temperature water or low-temperature oil. When the water pump 5 is working, the low-temperature liquid is pumped into the nozzle 11, and then sprayed from the nozzle 11 into the inclined pipe 4, and the nozzle 11 A control valve 6 is provided between the water pump 5 and the water pump 5 , and the control valve 6 controls the water pump 5 to supply low-temperature liquid to the nozzle 11 . By periodically opening and closing the control valve 6 , the nozzle 11 periodically supplies liquid into the inclined pipe 4 . The liquid sprayed from the nozzle 11 into the inclined tube 4 has the inertia of downward movement. The liquid is spaced at a certain distance in the inclined tube 4. The surface tension of the liquid fills the inclined tube 4 and sandwiches the air between the liquids. When moving along the inclined tube 4, the gas is moved downward. The first ventilation hole 9 is communicated with the top end of the inclined pipe 4, and air is continuously drawn from the first ventilation hole 9 during the movement of the liquid. The lower end of the inclined tube 4 is inserted into the cooling liquid of the low-temperature tank 3, and the liquid flows back into the low-temperature tank 3 after moving downward. It is discharged from the side wall of the lower part of the inclined pipe 4, and the circulation of the air is formed in the inflowing second air hole. In the process of air circulation, the air is in full contact with the cooling liquid, and the heat in the air enters the cooling liquid. The temperature change in the low temperature tank 3 is detected by the thermometer 7, and the heat dissipation performance of the automobile radiator can be objectively understood. Under other conditions Under the same circumstances, when the heat dissipation performance of the automobile radiator is strong, the temperature change of the coolant is large, and when the heat dissipation performance of the automobile radiator is poor, the temperature change of the coolant is small. When the water pump 5 is working, the water pressure generated in each pipeline is nearly the same. When the control valve 6 is opened, the cooling liquid in the pipeline is sprayed from the nozzle, and the cooling liquid flow and flow rate in each inclined pipe 4 are nearly the same. to push the water flow in the inclined pipes 4, so that the air flow in each inclined pipe 4 is the same, and finally the air flow of each first air hole 9 and the second air hole 10 is the same, and the air flow through each area of the automobile radiator is the same. Using the water column formed by the cooling liquid in the inclined pipe 4 to push the air flow can not only make the air flow in each area of the car radiator the same, but also make the cooling liquid fully contact with the air in the process of pushing the air flow, cool the air, and fully absorb the air. energy, which is more accurate when observing heat dissipation performance based on coolant temperature. The amount of air circulating in the whole detection device is small, and the heat absorbed by the temperature change of the air is small, which reduces the error of the small temperature rise of the cooling liquid caused by the air absorbing part of the heat. The heat preservation box 8 can prevent the heat exchange between the air and the cooling liquid inside and the outside, and reduce the error of detection.

Specifically, the angle between the spraying direction of the nozzle 11 and the inclined pipe 4 is 10-45 degrees, and the angle between the inclined pipe 4 and the horizontal plane is 30-60 degrees. The cooling liquid sprayed from the nozzle 11 is injected into the inclined pipe 4 at an inclined angle, which is beneficial to form a water column in the inclined pipe 4, and the air in the inclined pipe 4 is clamped and transported by the water column. The angle between the water spraying direction of the nozzle 11 and the inclined pipe 4 is 10-45 degrees, and the injected cooling liquid can have a downward movement component along the inclined pipe 4 . The angle between the inclined pipe 4 and the horizontal plane is 30-60 degrees, and the water column in the inclined pipe 4 moves downward along the inclined pipe 4 under the action of gravity.

Specifically, the refrigerating liquid is water, and the inner wall of the inclined pipe 4 is coated with a hydrophobic layer. The hydrophobic layer prevents water from adhering to the inclined tubes 4 in which the cooling liquid moves.

Specifically, the inclined pipe 4 is connected with a buffer tank 12 above the liquid, and the top of the buffer tank 12 is communicated with the second vent hole 10 through a pipeline. The cooling liquid flowing down from the inclined pipe 4 enters the buffer tank 12 , and is mixed with the cooling liquid in the low temperature tank 3 after flowing down from the buffer tank 12 . The cooling liquid and the air are separated in the buffer tank 12 to prevent the cooling liquid from flowing to the second through hole.

Specifically, the control valve 6 is a solenoid valve, the solenoid valve is signally connected to the controller 13 , and the controller 13 controls the solenoid valve to open and close periodically. The controller 13 controls the opening and closing of the solenoid valve, and has a simple structure and convenient operation.

Example 2

2 to 3 , the difference between this embodiment and Embodiment 1 is that the nozzle 11 includes an outer casing 14 , a movable block 15 and a spring 16 , and the outer casing 14 is provided with a first cavity 17 and a second cavity 18. The side wall of the inclined tube 4 is provided with an opening 19 communicating with the first cavity 17 and an annular slit 20 communicating with the second cavity 18. The diameter of the annular seam 20 is 0.5 to 1 times the diameter, the width of the annular seam 20 is 0.2 to 1 mm, the water outlet direction of the annular seam 20 is toward the lower end of the inclined pipe 4, and the first cavity 17 is provided with the movable A block 15 and a spring 16, the movable block 15 is rotatably connected to the inner wall of the first cavity 17, and both ends of the spring 16 are connected to the movable block 15 and the inner wall of the first cavity 17, in a natural state The movable block 15 covers part of the flow channel of the first cavity 17 , and when the liquid flows through the first cavity 17 , the movable block 15 is pushed to cover the opening 19 . After the control valve 6 is opened, the cooling liquid pumped by the water pump 5 is delivered to the first cavity 17 and the second cavity 18. The first cavity 17 has a large cross-sectional area of the flow channel, and the flow resistance of the cooling liquid is small. It flows into the inclined tube 4 from the first cavity 17 . The diameter of the opening 19 of the first cavity 17 communicating with the inclined pipe 4 is 0.5-1 times the inner diameter of the inclined pipe 4 . The movable block 15 and the spring 16 are arranged in the first cavity 17 , the movable block 15 is rotatably connected with the inner wall of the first cavity 17 , and the movable block 15 can rotate in the second cavity 18 to open and cover the opening 19. In the natural state, the movable block 15 opens the opening 19, but the movable block 15 still covers part of the flow channel of the first cavity 17. When the liquid flows through the first cavity 17, the liquid will push the movable block 15 covers the opening 19, and a certain amount of cooling liquid flows into the inclined pipe 4. After the opening 19 is covered, the cooling liquid can only flow out from the annular slit 20 that communicates with the second cavity 18. The water outlet direction of the annular slit 20 is toward the lower end of the inclined pipe 4. The Coanda wall flows under the effect of reaching, and at the same time, the cooling liquid entering the inclined pipe 4 from the first cavity 17 is driven, so that when the cooling liquid moves, the air in the inclined pipe 4 is pushed to flow. The structure of the nozzle 11 is favorable for forming a water column in the inclined pipe 4, and the air in the inclined pipe 4 is clamped and pushed by the water column.

Specifically, the annular slot 20 is C-shaped, and the annular slot 20 surrounds the lower end and both sides of the inclined tube 4 . The top of the annular slit 20 is not provided with a water outlet, and the water column in the inclined pipe 4 can be driven to move from the lower end and both sides.

Specifically, the first cavity 17 surrounds the inclined tube 4 . It is convenient to supply cooling liquid into the annular slot 20 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1. A device for testing heat dispersion of an automobile is characterized by comprising a first vertical plate, a second vertical plate, a low-temperature tank, an inclined pipe, a water pump, a control valve, a thermometer and an insulation box, wherein the first vertical plate is provided with a plurality of first air vents, the second vertical plate is provided with a plurality of second air vents, the first vertical plate and the second vertical plate are separated by a preset distance and are parallel to each other, cooling liquid is filled in the low-temperature tank, the inclined pipes are arranged in the low-temperature tank, the first air vents are communicated with the top ends of the inclined pipes, the second air vents are communicated with the side wall of the lower portion of the inclined pipes, the first air vents, the inclined pipes and the second air vents are communicated in a one-to-one correspondence manner, the side wall of the upper portion of the inclined pipes is provided with nozzles, the nozzles are communicated with the control valve, the control valve is communicated with the water pump, and the water pump is arranged in the low-temperature tank, the lower end of the inclined pipe is inserted into cooling liquid of the low-temperature tank, the thermometer is used for detecting the temperature in the low-temperature tank, and the first vertical plate, the second vertical plate, the low-temperature tank, the inclined pipe, the water pump, the control valve and the thermometer are installed in the heat insulation box.

2. The automobile heat dissipation performance testing device according to claim 1, wherein an included angle between a water spraying direction of the nozzle and the inclined pipe is 10-45 degrees, and an included angle between the inclined pipe and a horizontal plane is 30-60 degrees.

3. The device for testing heat dissipation performance of an automobile according to claim 1, wherein the refrigerant fluid is water, and an inner wall of the inclined tube is coated with a hydrophobic layer.

4. The device for testing heat dissipation performance of the automobile according to claim 1, wherein a buffer tank is communicated with the inclined pipe above the liquid, and the top of the buffer tank is communicated with the second vent hole through a pipeline.

5. The device for testing heat dissipation performance of an automobile according to claim 1, wherein the control valve is an electromagnetic valve, the electromagnetic valve is in signal connection with a controller, and the controller controls the electromagnetic valve to be opened and closed periodically.

6. The automotive heat dissipation performance testing device according to claim 1, the nozzle comprises an outer shell, a movable block and a spring, the outer shell is provided with a first cavity and a second cavity, the side wall of the inclined pipe is provided with an opening communicated with the first cavity and an annular seam communicated with the second cavity, the diameter of the opening is 0.5-1 times of the inner diameter of the inclined tube, the width of the annular gap is 0.2-1 mm, the water outlet direction of the annular gap faces to the lower end of the inclined pipe, the movable block and the spring are arranged in the first cavity, the movable block is rotationally connected with the inner wall of the first cavity, two ends of the spring are connected with the movable block and the inner wall of the first cavity, in a natural state, the movable block covers a part of the flow channel of the first cavity, and liquid pushes the movable block to cover the opening when flowing through the first cavity.

7. The automotive heat dissipation performance testing device according to claim 6, wherein the annular slit is C-shaped, and surrounds the lower end and two sides of the inclined tube.

8. The automotive heat dissipation performance testing device of claim 1, wherein the first cavity surrounds the inclined tube.

Images