KR101425407B1 - Thermal shock fatigue testing apparatus for radiator tester for automobile - Google Patents

Abstract

The present invention relates to a thermal shock fatigue testing device of a radiator. More specifically, the thermal shock fatigue testing device of the radiator alternately supplies high-temperature fluid and low-temperature fluid to a target radiator, and provides stress through thermal expansion by the high-temperature fluid and thermal contraction by the low-temperature fluid so as to test fatigue due to thermal shock. Therefore, the thermal shock fatigue testing device of the radiator can control a flow amount of the fluid flowing and a replacement cycle of the high-temperature fluid and the low-temperature fluid according to an embodiment of a user and the capacity of the radiator.

Description

TECHNICAL FIELD [0001] The present invention relates to a radiator thermal shock fatigue test apparatus,

The present invention relates to an apparatus for alternately supplying a high-temperature fluid and a low-temperature fluid to a radiator and performing a thermal shock fatigue test by repeating thermal expansion and heat shrinkage.

Generally, an engine serving as a power source of a vehicle generates heat at a considerably high temperature during its operation. When the engine is heated to a high temperature, it is affected by a power generating function of a normal characteristic. System.

According to the engine cooling system of the engine cooling system, an air cooling system that performs cooling by air and a water cooling system that performs engine cooling by flowing cooling water into the engine are typically known. Among them, in the case of the water cooling system, And the cooling water that absorbs heat in the cooling water passage of the cylinder head is cooled by the air while passing through the radiator, and the cooled cooling water is recirculated to the inside of the engine to release the heat of the engine.

According to the radiator employed in the water-cooled type, a fin (fin) is formed between a water tube and a water tube spaced apart from each other at regular intervals. When cooling water heated to a high temperature flows in the engine, Exchanged to cool the cooling water, and circulates the cooled cooling water again to the engine side to perform the cooling of the heated engine. Therefore, it is desirable that the radiator has a large amount of heat radiation per unit area, and the flow resistance of air and cooling water is small and the dimensions and weight are minimized.

However, when the radiator performs a heat exchange cooling operation of cooling water absolutely necessary for cooling the engine, the heat load acts to a considerable degree, and when the leakage of the cooling water occurs at any place constituting the radiator, The cooling of the engine can not be performed properly. Therefore, with respect to the radiator, it is necessary to artificially set a condition to be encountered in the course of actual operation of the vehicle, to sufficiently test the durability characteristic thereof, and then mount it on the vehicle.

It is an object of the present invention to provide a radiator for thermal shock fatigue test in which a high temperature fluid and a low temperature fluid are alternately flowed to a radiator to be tested, A plurality of radiators can be simultaneously tested for fatigue, and at the same time, the test conditions such as the amount of fluid flowing and the period of fluid movement, depending on the embodiment of the user and the capacity of the radiator To a radiator thermal shock fatigue testing apparatus.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Further, objects and advantages of the present invention can be realized by the means and the combination shown in the claims.

In order to solve the above-mentioned problems, the present invention provides a high-temperature tank (10) for supplying a high temperature fluid for thermal expansion to a first radiator part (R1) to be tested; First and second valves (20, 30) installed respectively in a discharge pipe (11) and a return pipe (12) of the high temperature tank (10); A low temperature tank 40 for supplying a low temperature fluid for heat shrinkage to the second radiator section R2 to be tested; Third and fourth valves (50, 60) installed in the discharge pipe (41) and the return pipe (42) of the low temperature tank (40); The first valve 20 is connected to the rear end of the third valve 50 and the fourth valve 60 is connected to the front end of the second valve 30 so that the high temperature fluid passes through the second radiator part R2, First and second auxiliary discharge pipes (70, 80) for allowing the first and second auxiliary discharge pipes The third valve 50 is connected to the rear end of the first valve 20 and the second valve 30 is connected to the front end of the fourth valve 60 so that the low temperature fluid passes through the first radiator R1, Third and fourth auxiliary discharge pipes (90, 100), respectively, .

As described above, the present invention has an effect that fatigue test of stress due to thermal expansion and heat shrinkage can be performed by alternately supplying the high temperature fluid and the low temperature fluid to the radiator.

Further, the present invention has an effect that fatigue tests can be simultaneously performed on a plurality of radiators.

Further, the present invention has an effect that the amount of fluid to be supplied, the supply period, and the like can be controlled according to various conditions such as the capacity of the radiator, the length of the pipe through which the fluid is moved, and the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing an embodiment of a radiator thermal shock fatigue testing apparatus according to the present invention, in which high temperature and low temperature fluids flow to first and second radiator parts, respectively; FIG.
FIG. 2 is a circuit diagram showing an embodiment in which a high-temperature fluid that has flowed through a first radiator section is supplied to a second radiator section; FIG.
3 is a circuit diagram showing an embodiment in which a low-temperature fluid that has flowed through a second radiator section is supplied to a first radiator section.
FIG. 4 is a circuit diagram showing an embodiment in which each of the first and second radiator units is supplied with a high-temperature / low-temperature fluid so as to flow therebetween.
FIG. 5 is a graph illustrating the change in temperature due to the exchange of high and low temperature fluids supplied from the first and second radiator units (heat exchangers) according to the present invention.
6 to 7 are views of an embodiment showing a radiator thermal shock fatigue testing apparatus according to the present invention.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front,""back,""up,""down,""top,""bottom, Expressions and predicates used herein for terms such as "left,"" right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Accordingly, in one embodiment of the present invention, a high temperature tank 10 for supplying a high temperature fluid for thermal expansion to a first radiator R1 to be tested; First and second valves (20, 30) installed respectively in a discharge pipe (11) and a return pipe (12) of the high temperature tank (10); A low temperature tank 40 for supplying a low temperature fluid for heat shrinkage to the second radiator section R2 to be tested; Third and fourth valves (50, 60) installed in the discharge pipe (41) and the return pipe (42) of the low temperature tank (40); The first valve 20 is connected to the rear end of the third valve 50 and the fourth valve 60 is connected to the front end of the second valve 30 so that the high temperature fluid passes through the second radiator part R2, First and second auxiliary discharge pipes (70, 80) for allowing the first and second auxiliary discharge pipes The third valve 50 is connected to the rear end of the first valve 20 and the second valve 30 is connected to the front end of the fourth valve 60 so that the low temperature fluid passes through the first radiator R1, Third and fourth auxiliary discharge pipes (90, 100), respectively, .

The first and third valves 20 and 50 are simultaneously operated to be connected to the first and second auxiliary discharge pipes 70 and 80 so as to be supplied to the first and second radiator units R1 and R2 So that the fluid can be exchanged from a high temperature to a low temperature or from a low temperature to a high temperature.

The second and fourth valves 30 and 60 allow the communication directions of the first and third valves 20 and 50 to be switched and concurrently operated after a preset time elapses, And 100, respectively, so that high temperature water can be introduced into the low temperature tank 40 or low temperature water can be circulated to the tank without being introduced into the high temperature tank 10.

The predetermined time may be set to a predetermined value depending on the capacity of the first and second radiator units R1 and R2 and the discharge pipes 11 and 41, the return pipes 12 and 42, the first, second, third and fourth auxiliary discharge pipes 70, 80, 90, 100) and the friction loss.

The predetermined time is a time at which the fluid, which was supplied before the switching of the communication directions of the first and third valves (20, 50), is recovered to the tank in which the fluid was supplied.

The first and second radiator units R1 and R2 are installed so that a plurality of radiators are connected to each other so that fatigue tests for thermal shocks of a plurality of radiators can be simultaneously performed.

The first and second radiator units R1 and R2 to be tested are configured to alternately supply the high temperature fluid and the low temperature fluid according to a predetermined period of time by the user to perform a fatigue test due to thermal expansion and heat shrinkage do.

The high temperature tank 10 and the low temperature tank 40 compensate for the difference in the length of the pipe through which the high temperature fluid and the low temperature fluid respectively flow and the difference in friction loss so that the high temperature tank 10 and the low temperature tank 40 always So that a constant water level can be maintained.

Further, it is possible to control the fluid amount of the high temperature fluid and the low temperature fluid according to the capacity of the first and second radiator sections (R1, R2) to be tested.

Hereinafter, a radiator thermal shock fatigue testing apparatus according to a preferred embodiment of the present invention will be described in detail with reference to FIG. 1 through FIG.

As shown, the radiator thermal shock fatigue testing apparatus according to the present invention includes a high temperature tank 10, a first valve 20, a second valve 30, a low temperature tank 40, a third valve 50, And includes a valve 60, a first auxiliary discharge pipe 70, a second auxiliary discharge pipe 80, a third auxiliary discharge pipe 90, and a fourth auxiliary discharge pipe 100.

The high-temperature tank (10) provides a high-temperature fluid to the radiator to be tested, and stores the high-temperature fluid in the empty space at a certain level where the high-temperature fluid passing through the radiator is recovered and stored.

The high temperature fluid is such that a mixture of antifreeze and water is used to match the actual test conditions of the radiator, which also applies to the low temperature fluid in the low temperature tank 40 described below.

The high temperature tank 10 is a housing in which the inside is empty. The discharge port and the recovery port are provided in communication with the inside of the outer rim. The discharge port and the recovery port are provided with a control valve V) may be further included.

In addition, the discharge port is connected to a plurality of radiators to be tested (in the present invention, the first radiator section R1 to be tested and the second radiator section R2 to be tested) through a discharge tube 11 in the form of a hose, The first radiator R1 is connected to the first radiator R1 through the hose-type return pipe 12 and the first radiator R1 is connected to the first radiator R1, So that the high-temperature fluid exiting through the inside can be returned to the high-temperature tank (10).

In the present invention, the radiator to be tested is referred to as a first radiator section R1 to be tested and a second radiator section R2 to be tested. The first radiator section R1 to be tested, the second radiator section R2 The plurality of single radiators are connected to each other through a separate hose so that the high temperature fluid of the high temperature tank 10 and the low temperature fluid of the low temperature tank 40, So that a plurality of radiators can be simultaneously subjected to the fatigue test.

The low-temperature tank 40 is a place where the low-temperature fluid, which is a mixture of the antifreeze and water, is supplied to the second radiator unit R2 to be tested and recovered, similarly to the high-temperature fluid in the high-temperature tank 10.

Of course, it is a matter of course that the low-temperature tank 40 is provided with a discharge port and a recovery port similarly to the high-temperature tank 10 described above, and the control valve should be provided in each of the discharge port and the recovery port.

The discharge port of the low temperature tank 40 is connected to one end of the second radiator part R2 to be tested by a discharge pipe 41 and the recovery port is connected to the other end of the second radiator part R2 to be tested, So that the fluid can be recovered after being supplied.

In the present invention, in the case of the high-temperature tank 10 described above, the discharge pipe 11 and the return pipe 12 are connected to the first radiator R1 to be tested, and the high-temperature fluid is supplied to the first radiator R1 to be tested In the case of the low temperature tank 40, the second radiator part R2 to be tested is connected to another exhaust pipe 41 and the return pipe 42 so that the second radiator part R2 to be tested Temperature fluid can be supplied and recovered through the first and second auxiliary discharge pipes, which will be described later, when the low-temperature fluid is to be supplied to and recovered from the first radiator R1 to be tested. And when it is desired to supply and recover the high temperature fluid to the second radiator part R2 to be tested, it can be supplied and recovered through the third and fourth auxiliary discharge pipes 90 and 100 to be described later. The first, second, third, and fourth auxiliary discharge pipes 70, 80, 90, and 100 will be described in detail.

The low-temperature tank 40 and the high-temperature tank 10 described above are connected to the discharge pipes 41 and 11, the return pipes 42 and 12, the lengths of the auxiliary discharge pipes (first, second, third and fourth auxiliary discharge pipes) And frictional loss, and can be stored at a constant water level in the low temperature tank 40 and the high temperature tank 10 at any time.

It is a matter of course that a cooling device is provided in the low temperature tank 40 and a heating device is provided in the high temperature tank 10 so that the low temperature fluid and the high temperature fluid are supplied.

The first valve 20 and the second valve 30 switch the flow direction of the high temperature fluid or the low temperature fluid. The first valve 20 is connected to the high temperature tank 10 and the first radiator part under test R1 And the second valve 30 is installed in the return pipe 12 connecting the high temperature tank 10 and the first radiator part under test R1 .

A three-way valve is used for the first and second valves 20 and 30, and the third and fourth valves 50 and 60 will be similarly applied.

The third valve 50 and the fourth valve 60 are intended to switch the flow directions of the low temperature fluid or the high temperature fluid in the same manner as the first and second valves 20 and 30, The fourth valve 60 is installed in the low temperature tank 40 and the second radiator part R2 to be tested so as to be installed in the discharge pipe 41 connecting the tank 40 and the second radiator part R2 to be tested. And is installed in the return pipe 42 that is connected.

The first auxiliary discharge pipe 70 connects the first valve 20 provided in the discharge pipe 11 for supplying the high temperature fluid of the high temperature tank 10 to the first radiator R1 to be tested, And connects the low-temperature fluid to another discharge pipe 41 which supplies the second radiator part R2 to be tested.

More specifically, one end of the first auxiliary discharge pipe 70 is connected to the first valve 20 and the other end is connected between the third valve 50 and the second radiator part R2 to be tested 50) in the discharge pipe 41 of the apparatus.

The second auxiliary discharge pipe 80 is connected to the fourth valve 60 provided in the return pipe 42 for collecting the low temperature fluid passing through the second radiator part R2 to be tested to the low temperature tank 40, And is connected to the recovery pipe 12 through which the high-temperature fluid is recovered to the high-temperature tank 10 through the radiator R1.

That is, the first and second auxiliary discharge pipes 70 and 80 are connected to the low temperature tank 40 through the discharge pipe 41 and the return pipe 42, and the second radiator unit R2 The third and fourth valves 50 and 60 are arranged in such a manner that the low temperature fluid in the low temperature tank 40 can be circulated to the high temperature tank 10 after the high temperature fluid in the high temperature tank 10 flows into the high temperature tank 10, When the high temperature fluid is to be supplied to the second radiator part R2 to be tested, the flow direction of the first valve 20 is changed and the high temperature fluid is supplied to the second radiator part R2. The hot fluid is allowed to pass through the second radiator part R2 to be tested and then the high temperature fluid passing through the second radiator part R2 to be tested while the communication direction of the fourth valve 60 is changed is not the low temperature tank 40 And can be recovered to the high temperature tank (10).

The third auxiliary discharge pipe 90 has one end connected to the third valve 50 and the other end connected to the discharge pipe 11 connecting the high temperature fluid to the first radiator R1 to be tested. Is to connect the discharge pipe (11) between the first valve (20) and the first radiator part (R1) to be tested to the third valve (50).

The fourth auxiliary discharge pipe 100 has one end connected to the second valve 30 and the other end connected to a return pipe (not shown) for collecting the low temperature fluid passing through the second subject radiator R2 to the low temperature tank 40 42, respectively. In other words, the fourth auxiliary discharge pipe 100 is connected to the return pipe 42 between the low temperature tank 40 and the fourth valve 60.

When the low temperature fluid flows from the high temperature tank 10 to the first radiator part R1 to be tested, the communication direction of the third valve 50 is switched to the low temperature tank 40 are moved to the discharge pipe 11 between the first valve 20 and the first radiator part under test R 1 instead of going to the second radiator part R 2 to be tested, The low temperature fluid discharged through the first radiator unit R1 to be tested is not recovered to the high temperature tank 10 through the recovery pipe 12 provided with the second valve 30 The second valve 30 is switched to communicate with the fourth auxiliary discharge pipe 100 and flows through the fourth auxiliary discharge pipe 100 between the fourth valve 60 and the low temperature tank 40, 40). ≪ / RTI >

Hereinafter, the operation of the preferred embodiment of the present invention having the above-described structure and structure will be described.

1, the high-temperature tank 10 is configured such that a high-temperature fluid is circulated only through the discharge pipe 11 and the return pipe 12 to the first radiator R1 to be tested, 2 valves 20 and 30 can also supply the high temperature fluid only to the first radiator section R1 to be tested and to recover only the high temperature fluid discharged from the first radiator section R1 to be tested to the high temperature tank 10 will be. That is, the first valve 20 is not in communication with the first auxiliary discharge pipe 70, and the second valve 30 is not in communication with the fourth auxiliary discharge pipe 100.

1, the low-temperature tank 40 is also configured to allow the low-temperature fluid to be circulated through only the second radiator part R2 to be tested through another discharge pipe 41 and the return pipe 42 , The third valve 50 at this time is not in communication with the third auxiliary discharge pipe 90 and the fourth valve 60 is in a state of not communicating with the second auxiliary discharge pipe 80, Only the front and rear ends of the discharge pipe 41 provided with the valve 50 communicate with each other and only the front and rear ends of the return pipe 42 provided with the fourth valve 60 are communicated.

When the high temperature fluid of the high temperature tank 10 is to be supplied to the second radiator section through which the low temperature fluid only flows from the low temperature tank 40, as shown in FIG. 2, The front end of the first valve 20 is operated in such a manner that the front end of the first valve 20 communicates with the first auxiliary discharge pipe 70, The high temperature fluid is supplied to the second radiator part R2 to be tested while moving to the rear end of the third valve 50 of the low temperature tank 40. At this time, And the rear end of the fourth valve 60 is operated to be in communication with the second auxiliary discharge pipe 80 so that the high temperature fluid circulating through the second radiator part to be tested R2 is supplied to the high- (10).

3, when the low temperature fluid of the low temperature tank 40 is to be supplied to the first radiator R1 through which only the high temperature fluid flows from the high temperature tank 10, the third valve 50 Is operated in such a manner that the front and rear ends of the third valve 50 communicate with each other and the front end of the third valve 50 communicates with the third auxiliary discharge pipe 90, The low temperature fluid of the first valve 30 is supplied to the first radiator while the low temperature fluid of the second valve 30 is moved to the rear end of the first valve 20 of the high temperature tank 10, The communicating direction is changed so that the rear end of the second valve 30 is operated to be in communication with the fourth auxiliary discharge pipe 100 so that the low temperature fluid circulated through the first radiator R1 is returned to the low temperature tank 40 ).

In order to simultaneously perform the fatigue test on the plurality of second radiator parts R2 to be tested, the low temperature fluid is supplied to the first radiator part R1 to be tested, to which the high temperature fluid has been supplied, 4, the first and third valves 20, 50 must be turned simultaneously while being operated simultaneously, and the second and third valves 20, The fluid supplied to the first and second radiator units R1 and R2 to be tested is simultaneously changed from a high temperature to a low temperature or from a low temperature to a high temperature at the same time when the four valves 30 and 60 are also operated simultaneously (A display of a PC or the like) that the fluid flowing in the first and second radiator units (ex: heat exchanger) to be tested is continuously changed at the outlet side in FIG. If the fluid is cold (Temperature / pressure sensor 120) is connected to the first and second radiator parts under test (ex: heat exchange And the temperature / pressure sensor 120 should be electrically connected to the controller 140, the display device, and the like.

In addition, the simultaneous operation of the first and third valves 20 and 50 and the simultaneous operation of the second and fourth valves 30 and 60 must have an interval equal to a predetermined time interval between the first and third valves 20 and 50, The low temperature fluid flows into the high temperature tank 10 or the high temperature fluid flows from the low temperature tank 40 to the low temperature tank 40. When the low temperature tank 40 and the three valves 20, The temperature of the fluid in the high temperature tank 10 and the low temperature tank 40 can not be maintained at a predetermined level and becomes the same.

More specifically, the first, second, third and fourth valves 20, 30, 50 and 60 are operated in such a manner that only the front and rear ends thereof communicate with each other. In the first radiator R1 to be tested, Only the low temperature fluid of the low temperature tank 40 flows into the second radiator part R2 to be tested and only the low temperature fluid of the low temperature tank 40 flows into the second radiator part R2 of the test subject. Temperature fluid that is temporarily supplied to the first radiator R1 to be tested and is recovered to the low-temperature tank 40 is supplied to the first and second valves 20, The temperature of the low temperature tank 40 becomes higher than the existing temperature and is temporarily supplied to the second radiator section R2 to be tested and the temperature of the high temperature tank 40 is increased. The high temperature fluid recovered into the high temperature tank 10 is also supplied to the low temperature fluid which has conventionally been flowing between the third and fourth valves 50, 0), the temperature of the high-temperature tank 10 becomes lower than the existing temperature. As a result, the tubes for recovering the fluid such as the second and fourth auxiliary discharge pipes 80 and 100 are connected later than the first and third auxiliary discharge pipes 70 and 90 for supplying the fluid of different temperatures, And the low temperature fluid is not mixed (securing the time until the fluid which has been flowing in the past is recovered to the tank from which it was originally supplied). Therefore, the direction switching operation of the second and fourth valves 30 and 60 Is operated later than the direction switching operation of the first and third valves (20, 50) by a preset time.

The pre-set time is such that the changeover time of the second and fourth valves 30 and 60 is relatively later than the changeover time of the first and third valves 20 and 50, The discharge pipes 11 and 41 and the return pipes 12 and 42 provided with the first, second, third and fourth valves 20, 30, 50 and 60 and the first, second, third and fourth valves The length of the auxiliary discharge pipes 70, 80, 90 and 100, and the friction loss.

The hot fluid and the low temperature fluid can also control the first, second, third, and fourth valves 20, 30, 50, 60 so that the hot fluid and the hot fluid are alternately supplied in accordance with a predetermined time period The control unit 140 for controlling the first, second, third and fourth valves 20, 30, 50 and 60 is provided with the first, second, third and fourth valves 20, 30, 50 and 60, And a plurality of sensors (temperature sensors, flow meters, control valves, etc.).

The temperature and pressure sensors 120 and 120 are respectively connected to the front and rear ends of the first radiator R1 and the front and rear ends of the second radiator R2 and the low and high temperature tanks 10 and 40, And the flow meter 130 can be installed and it can be confirmed that the alternation of the low temperature fluid and the high temperature fluid is performed through the temperature measurement at the inlet or the outlet of the first and second radiators R1 and R2 to be tested, The discharge pipes 11 and 41, the return pipes 12 and 42, the first, second, third and fourth auxiliary discharge pipes 70, 80 and 90, as well as the discharge port and the recovery port of the hot tank 10 and the cold tank 40, , 100) can also be provided with a control valve to control the flow rate and enable flow ON / OFF (ON / OFF). It is a matter of course that the motor pump device 110 is installed in the discharge pipes 11 and 41 and the return pipes 12 and 42 so that the fluid can flow.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

10: high temperature tank 11, 41: discharge pipe
12, 42: collection pipe 20: first valve
30: second valve 40: low temperature tank
50: third valve 60: fourth valve
70: First auxiliary discharge pipe 80: Second auxiliary discharge pipe
90: Third auxiliary discharge pipe 100: Fourth auxiliary discharge pipe
110: motor pump device 120: temperature / pressure sensor
130: Flowmeter
R1: first radiator part under test
R2: test subject second radiator part
V: Control valve

Claims (9)

A high temperature tank 10 for supplying a high temperature fluid for thermal expansion to the first radiator section R1 to be tested;
First and second valves (20, 30) installed respectively in a discharge pipe (11) and a return pipe (12) of the high temperature tank (10);
A low temperature tank 40 for supplying a low temperature fluid for heat shrinkage to the second radiator section R2 to be tested;
Third and fourth valves (50, 60) installed in the discharge pipe (41) and the return pipe (42) of the low temperature tank (40);
The first valve 20 is connected to the rear end of the third valve 50 and the fourth valve 60 is connected to the front end of the second valve 30 so that the high temperature fluid passes through the second radiator part R2, First and second auxiliary discharge pipes (70, 80) for allowing the first and second auxiliary discharge pipes
The third valve 50 is connected to the rear end of the first valve 20 and the second valve 30 is connected to the front end of the fourth valve 60 so that the low temperature fluid passes through the first radiator R1, And third and fourth auxiliary discharge pipes (90, 100)
The first and third valves 20 and 50 are simultaneously operated to be in communication with the first and second auxiliary discharge pipes 70 and 80 so that the fluid supplied to the first and second radiator units R1 and R2 To a low temperature, or from a low temperature to a high temperature,
The third and fourth auxiliary discharge pipes 90 and 100 are connected to the second and fourth valves 30 and 60 so that the communication directions of the first and third valves 20 and 50 are switched, Temperature water is introduced into the low-temperature tank 40 or low-temperature water does not flow into the high-temperature tank 10, so that the high-temperature water can be circulated to the tank in which it was supplied,
The predetermined time period is set to a predetermined time based on the capacity of the first and second radiator units R1 and R2 and the discharge pipes 11 and 41, the return pipes 12 and 42, the first, second, third and fourth auxiliary discharge pipes 70 and 80 , 90 and 100 and the frictional loss and is the time at which the fluid supplied before the switching of the communication direction of the first and third valves 20 and 50 is recovered to the tank in which it was supplied,
The first and second radiator units R1 and R2 are provided so that a plurality of radiators are connected to each other so that the fatigue test for thermal shocks of a plurality of radiators can be simultaneously performed,
The first and second radiator sections (R1 and R2) to be tested are alternately supplied with the hot fluid and the low-temperature fluid according to a predetermined period of time by the user to perform a fatigue test due to thermal expansion and heat shrinkage,
The high temperature tank 10 and the low temperature tank 40 correct the difference in the length of the pipe through which the high temperature fluid and the low temperature fluid respectively flow and the difference in the friction loss so that the high temperature tank 10 and the low temperature tank 40 constantly , ≪ / RTI >
Wherein a fluid amount of the high temperature fluid and the low temperature fluid is adjustable according to the capacity of the first and second radiator units (R1, R2) to be tested.
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