JPH03245031A - Waterproof test method - Google Patents

Abstract

PURPOSE:To prevent intrusion of water into a substance under test by draining water out of a container after the test, and returning the inside into an atmospheric pressure with a vacuum pump. CONSTITUTION:A substance under test 1 is fixed in a pressure reduced water tank 5 in a container 2. Water in a water tank 4 is supplied by a water feeding and draining pump 6, and the substance under test 1 is submerged into the water. Then the container is tightly closed with a cap 51. Thereafter, the air pressure in the container is reduced to the specified pressure by a vacuum pump 7. The presence or absence of the generation of bubbles from the substance under test 1 is observed, and the intactness of the waterproof property is judged. When the substance under test 1 is taken out after the test, the water (b) in the container 2 is forcibly returned into the water tank 4 by the pump 6 under the pressure reduced state in the container 2. The substance under test 1 emerges from the submerged state into the non-submerged state. Thereafter, the pressure in the water tank 5 is returned to the atmospheric pressure. When the pressure is returned to the atmospheric pressure under the submerged state, however, the water on which the atmospheric pressure is applied intrudes into the substance under test 1 whose waterproof is defective so as to cause the bubbles. The occurrence of troubles such as defective insulation due to the water intrusion can be eliminated in this method.

Description

[Detailed Description of the Invention] [Summary] Water is placed in a sealed container whose inside can be observed from the outside, the test object is submerged in the water tank of the container, the pressure inside the container is reduced, and the water is placed inside the container. Regarding the waterproof test method, which tests the waterproofness of a test object by observing the presence or absence of air bubbles from inside the submerged test object, when returning the inside of the decompression tank to atmospheric pressure after the test, The purpose of this test is to provide a waterproof test method that can prevent the ingress of water into a water tank, in which the test object is fixed in a container large enough to allow observation of the inside and into which the test object can be immersed, and the container is filled with water. A water pump is used to supply water from the water tank to a reduced pressure water tank in which the internal pressure of the container is reduced, the test object is immersed in water, the lid of the container is sealed, and the container of the reduced pressure water tank is removed using a vacuum pump. The internal pressure of the test object is reduced to a predetermined pressure, and the presence or absence of bubbles from the test object is observed to determine whether the test object is waterproof. Water in the water tank is forcibly returned to the water tank while the atmospheric pressure is being reduced by the pump, and the test object is taken out of the submerged state and the internal pressure of the container of the reduced pressure water tank is returned to atmospheric pressure in the non-submerged state. do.

[Industrial Application Field] The present invention involves placing water in a sealed container whose interior can be observed from the outside, placing an object to be tested such as an electronic device in the water tank of the container, and observing the inside of the container. The present invention relates to a waterproof test method for performing a waterproof test on a test object by reducing the pressure and observing whether bubbles are generated from the test object held in the container.

[Conventional technology]

In the conventional waterproof test method, as shown in Figure 2, the test object I
For example, look around the aquarium 4A, which is a transparent acrylic container filled with water that is large enough to allow A to be immersed and the inside can be observed.
The test object in the water tank 4A is placed in a sealed pressure reducing tank 3A which has been reduced to a predetermined pressure with the vacuum pump 7A, and the valve 71A of the vacuum pump 7A is closed to maintain the reduced pressure state inside the pressure reducing tank 3A. By observing the presence/absence of bubbles generated from the IA, the waterproofness of the test object 1 was tested as to whether it was poor or good.

(Problem to be Solved by the Invention) In the conventional waterproof testing method described above, the test object 18 is placed in a water tank 4A for testing, and the inside of the decompression tank 3A is pumped with a vacuum pump 7.
The pressure is reduced to a predetermined atmospheric pressure at A, and due to the pressure difference between the inside of the test object IA and the inside of the decompression tank 3A, air bubbles are generated from waterproof defects such as gaps in the case of the outer cover of the test object IA. After the test, the test object l^ was placed in the water in the water tank 4A, and the inside of the decompression tank 3A was returned to atmospheric pressure, so the test object generated air bubbles. IA
The pressure inside the case is lower than atmospheric pressure. When the inside of the decompression tank 3A is returned to atmospheric pressure again, the water to which atmospheric pressure has been applied will infiltrate the inside of the case of the test object LA, which has air bubbles and is not waterproof, through the gaps in the case. . Intrusion of water into the case in this way causes problems such as poor insulation in the electric circuit of the test object 1A inside the case. In view of the above-mentioned circumstances, an object of the present invention is to provide a waterproof test method that can prevent water from entering the test object IA when returning the inside of the decompression tank 3A to atmospheric pressure after the test.

[Means for Solving the Problem] As shown in FIG.
The container 2 has a water tank 4 in which the container 2 is fixed and water is poured into the container 2.
The pressure at the top of the water tank 5 is reduced, and the water tank 4 is pumped and drained by a pump 6, two of which are in total;
: (Mi supply = the subject of the test, the first decompression water tank 5)
The lid 51 of the container is sealed. Thereafter, the internal pressure of the container 2 of the reduced-pressure water tank 5 is reduced to a predetermined pressure using the vacuum pump 7, and the presence or absence of bubbles from the test object 1 is observed to determine whether the waterproofness is good or not. To take out the test object 1 from the reduced pressure water tank 5,
While the internal pressure of the container 2 of the decompressed water tank 5 is being reduced, the water tank 4 is
According to the waterproof test method of the present invention, the water is forcibly returned to the water tank 4 by the pump 6, the test object 1 is taken out of the submerged state, and the pressure in the decompression tank 5 is returned to atmospheric pressure in the non-submerged state. resolved.

In the principle diagram of FIG. 1 showing the basic configuration of the waterproof test method of the present invention, 1 is a test object to be tested for waterproofness, and a mounting stand 3 in a container 2 having a size that allows the whole to be immersed. At the time of the test, the test is carried out in a reduced pressure water tank 5 in which water is supplied from the water tank 4 by the pump 6 and the container 2 is submerged in water, and the internal pressure of the container 2 is reduced to a predetermined pressure by the vacuum pump 7.

2 is a size 0 container in which the inside can be observed and the test object 1 can be immersed therein.

3 is a mounting base for the test object 1 in the container 2.

4 is a water tank for supplying water to or draining water from the container 2.

5 is a water tank 4 in a container 2 with a test object l fixed on a mounting base 3.
This is a reduced-pressure water tank in which the test object 1 is submerged in water by being supplied with water from the container 2, and the atmospheric pressure at the upper part of the container 2 is reduced to a predetermined pressure by a vacuum pump 7.

Reference numeral 6 denotes a water supply/drainage pump that supplies water from the water tank 4 to the container 2 during the test, and drains water from the container 2 and returns it to the water tank 4 when the test object 1 is taken out after the test.

7 is a vacuum pump that reduces the pressure inside the container 2 to a predetermined pressure when water is supplied during the test and when draining water after the test, and returns it to atmospheric pressure when taking out the test object 1 after draining.

[Effect]

In the waterproofing test method of the present invention, after the test, water is drained from the container 2 using the pump 6 for water supply and drainage, and then the inside of the container 2 is returned to atmospheric pressure using the vacuum pump 7. It can prevent water from entering. Therefore, test object 1
Problems such as poor insulation will no longer occur, and the problem will be solved.

〔Example〕

The principle diagram in Fig. 1 shows the configuration of the waterproof test method according to the embodiment of the present invention as it is, and (a) in the same figure is a cross-sectional view during the test, and (b) is a cross-sectional view of the test object after the test. It is a sectional view of the device at the time, and SA, which was already explained but not explained,
Sll indicates a solenoid valve.

The solid line arrow indicates the water supply route from the water tank 4 of the reduced pressure water tank 5 to the container 2, and the dotted line arrow indicates the drainage route from the container 2 of the reduced pressure water tank 5 to the water tank 4.

The waterproof test method shown in Figure 1 is as follows: After the test, the water supply and drainage pump 6
After operating the solenoid valves SA and S, water is drained from the container 2 as shown by the dotted arrow, and the inside of the container 2 is returned to atmospheric pressure using the vacuum pump 7, so that a negative It is possible to prevent water from entering due to the pressure of The quality and reliability of the product equipment is maintained, and there are no problems.

[Effects of the Invention] As explained above, according to the present invention, since water is prevented from entering the test object (product) with poor waterproofing, the test time is shortened, the cost of the product is reduced, and the reliability is improved. An improvement effect can be obtained.

((1>I' out of 7 exams) Figure

[Brief explanation of drawings]

FIG. 1 is a principle diagram showing the basic structure of the waterproof test method of the present invention, and FIG. 2 is a sectional view showing the structure of a conventional waterproof test method. In the figure, ■ is the test object, 2 is the container, 3 is the mounting base, and 4
5 is a water tank, 5 is a reduced pressure water tank, 6 is a water supply and drainage pump, and 7 is a vacuum pump. Water skill test 1 of the present invention The grave structure of the grave tree structure of the present invention 1st page (T no 1) (b) Question 7 of the puzzle 1. Diagram of Hamari's removed kidney, 2000-2000 Pwosui language people, ancient history Logita's base 1\se (Hamongishakusu x self-work) sheep diagram (? no 2) Conventional (7) Obstacles”〈Test 1 test method Roku no Mizohachi Σ ↑ Cross-sectional view Figure 2

Claims (1)

[Claims] Water is placed in a sealed container that allows the inside to be observed from the outside, and the test object is submerged in the water tank of the container, and the pressure inside the container is reduced to remove air bubbles from within the test object submerged in the container. In a waterproof test method, the waterproofness of a test object is tested by observing the occurrence of
1) The test object is fixed in a container (2) of a size that can be immersed in the test object, and the container has a water tank (4) in which water is poured, and the internal pressure of the container is reduced to a reduced pressure water tank (5). , the water from the water tank is supplied to the container by the pump (6) for pumping and draining, the test object is submerged in water, the lid of the container is sealed, and the vacuum pump (7)
) to reduce the internal pressure of the vacuum water tank container to a predetermined pressure, observe the presence or absence of air bubbles from the test object to determine whether the test object is waterproof, and then remove the test object from the vacuum water tank. The water in the tank is forcibly returned to the tank using the pump while the internal pressure of the container of the reduced pressure water tank is reduced, and the test object is removed from the submerged state, and the inside of the container of the reduced pressure water tank is removed in the non-submerged state. A waterproof testing method characterized by returning the atmospheric pressure to atmospheric pressure.