CN117249964B - Test water tank, test system and test method for simulating water tank environment of washing device - Google Patents
Test water tank, test system and test method for simulating water tank environment of washing device Download PDFInfo
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- CN117249964B CN117249964B CN202311525144.4A CN202311525144A CN117249964B CN 117249964 B CN117249964 B CN 117249964B CN 202311525144 A CN202311525144 A CN 202311525144A CN 117249964 B CN117249964 B CN 117249964B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 172
- 238000005406 washing Methods 0.000 title claims abstract description 41
- 238000010998 test method Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 154
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000012806 monitoring device Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 5
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- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
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- 230000000630 rising effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to the technical field of part testing, and particularly relates to a test water tank, a test system and a test method for simulating the environment of a water tank of a washing device. The technical proposal is as follows: the test water tank includes: an upper case having a cylindrical shape; the lower box body is in a ball shape, and the upper end of the lower box body is connected with the lower end of the upper box body to form a flask-shaped structure; the inner cavity of the upper box body is communicated with the inner cavity of the lower box body to form a test cavity, the test cavity is provided with a water inlet valve, and the top of the test cavity is connected with the outside through a pipe fitting provided with an air inlet valve; the drain pipe is communicated with the bottom of the test cavity; the air chamber is positioned in the test cavity and is communicated with the inside of the test cavity through an opening at the bottom; and the air chamber is connected with a pipeline penetrating out of the test water tank. The invention provides a test water tank, a test system and a test method for simulating the environment of a water tank of a washing device, which can test a liquid level sensor and a drain valve which are commonly used in the washing device and improve the test rate.
Description
Technical Field
The invention belongs to the technical field of detection, in particular relates to the technical field of part testing, and particularly relates to a test water tank, a test system and a test method for simulating the environment of a water tank of a washing device.
Background
At present, a large amount of fluid machines are used in washing devices under the new technology, such as intelligent washing machines, and various electric elements and fluid machines need to be tested in the research and development design process, so that the performance and the service life of the washing devices can meet the use requirements.
In the intelligent washing machine, a water tank includes therein a drain valve for discharging water, a liquid level sensor for detecting a liquid level, a control element, and the like, for example, the drain valve and the liquid level sensor are important fluid parts of the water tank assembly. In the actual process, the drain valve is not only responsible for drainage function, when the inner cavity of the washing machine needs to realize the negative pressure dehydration performance, the inner part of the water tank of the washing machine is in a negative pressure state, so that the drain valve can be completely closed under the negative pressure condition to ensure the sealing effect, and when the requirement for controlling the change of the liquid level height of the water tank in the washing machine is met, the liquid level control is also realized through the drainage amount of the drain valve. Because such drain valves are used frequently, there is a high demand for reliability and durability of their performance. Durability use tests are required for such products to ensure that the accuracy and durability of their function meets the requirements. For another example, the liquid level sensor is used for testing the liquid level, and the liquid level sensor is required to face the working condition that the water tank is under negative pressure, so that the detection effect, the service life and the like of the liquid level sensor are required to be ensured.
In the prior art, when each part is tested, a mode of respectively and separately testing is generally adopted, a plurality of sets of testing devices are required for testing, and a test result can only reflect the working performance of each part in an independent state, for example, when a drain valve and a liquid level sensor are tested, a sealing performance testing device is generally adopted for testing the sealing performance of the drain valve, and then a liquid level sensor testing device is adopted for testing the liquid level detection accuracy of the liquid level sensor, a testing device cannot be adopted for testing the drain valve and the liquid level sensor, and the existing sealing performance testing device or the liquid level sensor testing device cannot meet the performance testing requirements of each part in the actual working condition of a water tank of a washing machine, and cannot simulate the actual working condition during testing, in particular, the working condition of the water tank during negative pressure dehydration of the washing machine is simulated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a test water tank, a test system and a test method for simulating the water tank environment of a washing device, which can simulate the actual working condition of the water tank of the washing device and the working state of each part, can also meet the repeated test requirements in the test requirements, can test at least one part in a water tank assembly based on the test system, and can test the tested part in the environment matched with other parts of the water tank of the washing device, thereby reflecting the working performance of the tested part in practice; the test system has compact structure, small test space and strong universality, and improves the test precision and efficiency.
To solve the deficiencies of the prior art, a first aspect of the present invention provides a test tank for simulating a tank environment of a washing device, the test tank comprising:
an upper case having a cylindrical shape;
the lower box body is in a ball shape, and the upper end of the lower box body is connected with the lower end of the upper box body to form a flask-shaped structure;
the inner cavity of the upper box body is communicated with the inner cavity of the lower box body to form a test cavity, and the test cavity is provided with a water inlet valve.
Further, the device also comprises a drain pipe and an air chamber; the top of the testing cavity is connected with the outside through a pipe fitting provided with an air inlet valve;
the drain pipe is communicated with the bottom of the test cavity;
the air chamber is positioned in the test cavity and is communicated with the inside of the test cavity through an opening at the bottom; and the air chamber is connected with a pipeline penetrating out of the test water tank.
Preferably, the outer wall of the test water tank is provided with a transparent part, and scale marks are arranged on the transparent part.
Preferably, the wall of the air chamber is of a shell structure, and the air chamber is of a tile-shaped structure as a whole.
Preferably, the number of the test cavities is at least one, and when the number is a plurality, the size of each of the test cavities may be the same or different.
A second aspect of the present invention provides a test system for simulating the environment of a tank of a washing apparatus, the device comprises the test water tank, a negative pressure generating device, a pressure monitoring device and a control element:
The negative pressure generating device is connected with the top of the testing cavity through a pipe fitting;
the pressure monitoring device is connected with the top of the testing cavity through a pipe fitting;
the control element is electrically connected with the drain valve;
the drain pipe is provided with a drain valve, and the pipeline is connected with the liquid level sensor;
wherein, at least one of drain valve, liquid level sensor, admission valve, water intaking valve, negative pressure generating device and pressure monitoring device is as test part.
Preferably, the control element is arranged on the base, and is electrically connected with the liquid level sensor, the air inlet valve, the water inlet valve and the negative pressure generating device respectively, and the test water tank and the negative pressure generating device are both arranged on the base.
Preferably, the negative pressure generating device is connected with the top of the testing cavity through a multi-way pipe, one end of the multi-way pipe is connected with an air port at the top of the testing cavity, the other end of the multi-way pipe is provided with a first branch pipe, a second branch pipe and a third branch pipe, the first branch pipe is connected with the negative pressure generating device, the pressure monitoring device is arranged on the second branch pipe, and the air inlet valve is arranged at the pipe orifice of the third branch pipe.
The third aspect of the invention provides a test method of a test system for simulating the water tank environment of a washing device, which adopts the above part test system for simulating the water tank environment, and selects at least one of a drain valve, a liquid level sensor, an air inlet valve, a water inlet valve, a negative pressure generating device, a pressure monitoring device and a control element as a part to be tested for testing.
Preferably, the liquid level sensor and the drain valve are selected as test parts, comprising the following test steps:
s010, installing a drain valve to be tested on a drain pipe, and connecting a liquid level sensor to be tested with the pipeline; at this time, the air inlet valve and the water inlet valve are in an open state, and the water discharge valve to be tested is in a closed state;
s020, the steps comprise:
s021 drain valve air tightness test, namely closing the water inlet valve and the air inlet valve, opening the negative pressure generating device, forming negative pressure in the test cavity, and reading the pressure monitoring device to judge the air tightness of the drain valve to be tested; if the negative pressure in the test cavity can reach the set parameters, the drain valve is qualified, otherwise, the drain valve is unqualified;
s022, accuracy testing of a liquid level sensor and water tightness testing of a drain valve: according to the target pressure measured value of the liquid level sensor to be tested, injecting liquid into the testing cavity, transmitting a signal to control the water inlet valve to be closed after the target pressure is measured by the liquid level sensor to be tested, comparing the scale mark reading of the testing water tank with the measured liquid level of the liquid level sensor to be tested, and judging the accuracy of the liquid level sensor to be tested; if the reading of the scale mark of the water tank is consistent with the liquid level measured by the liquid level sensor, the liquid level sensor is qualified, otherwise, the liquid level sensor is unqualified; meanwhile, whether water flows out of the drain pipe or not is observed, and the water tightness of the drain valve to be tested is judged;
If the test method of S022 is carried out after the S021 is carried out, the test method comprises the following steps: after the step S021 is carried out, the negative pressure generating device is closed, the air inlet valve and the water inlet valve are opened until the air pressure in the test cavity is restored to the atmospheric pressure, the step S022 is carried out, and the single test is finished; or if the test method S022 is performed first, the test method S021 is as follows: after the step S022 is carried out, opening a drain valve to be tested to drain liquid in the testing cavity, closing the drain valve to be tested, and carrying out the step S021, wherein the single test is finished;
s030, if the ageing resistance of the liquid level sensor and the drain valve is required to be tested, repeating the steps S010-S020 for a plurality of times.
The invention at least comprises the following beneficial effects:
1. according to the test system, the liquid level sensor test and the drain valve test are organically unified, so that the test system has the liquid level sensor test and the drain valve test functions, and the drain valve and the liquid level sensor can be tested by adopting one set of system equipment, so that the overall test efficiency is improved;
2. the test system can realize the test of the air tightness and the water tightness of the drain valve, and is beneficial to improving the test effect;
3. according to the invention, the test water tank structure is designed, so that the test water tank not only can meet the function of simulating the water tank of the washing device, but also has the compression resistance function, thereby being beneficial to prolonging the service lives of the test water tank and a test system, and meeting the requirement of increasing the water pressure under the condition of saving space; the spherical structure of the lower box body is used for realizing the effect of providing most volume so as to store more water, the spherical structure can better realize the compression resistance effect, and the upper box body realizes the longitudinal space folding so that the liquid with the same volume can have higher liquid level, thereby meeting the higher liquid level test requirement; meanwhile, the internal structure can adapt to the influence of air pressure and water pressure;
4. The test system provided by the invention has the working conditions of the liquid level sensor and the drain valve under the actual working condition of the simulated water tank, so that the liquid level sensor and the drain valve to be tested can be tested under the environment of the simulated actual working condition, and the test precision and the test effect can be improved;
5. the test system of the invention can also test other water pressure or water level related elements needed by the washing device.
Drawings
Fig. 1 is a right side view of the test tank of the present invention.
FIG. 2 is a schematic view of the cross-sectional structure of FIG. 1 at A-A in accordance with the present invention.
Fig. 3 is a schematic perspective view of a test tank according to the present invention.
Fig. 4 is a schematic view of the structure of the inside of the test tank of the present invention.
Fig. 5 is a schematic perspective view of a test system according to the present invention.
Fig. 6 is a right side view of the test system of the present invention.
Fig. 7 is a bottom view of the testing system of the present invention.
Reference numerals: 100-test water tank, 101-scale mark, 102-water inlet, 103-air port, 110-test cavity, 111-stiffener, 120-upper box, 130-lower box, 140-connecting part, 150-placing plate, 151-connecting block, 152-coaming, 153-notch, 154-stiffener plate, 160-fixing component, 161-seat, 162-extension arm, 1621-hook part, 163-avoidance groove, 170-support cylinder, 171-mounting skirt, 200-negative pressure generating device, 300-pressure monitoring device, 400-drain pipe, 500-air chamber, 510-pagoda head, 520-air chamber wall, 521-arc surface, 530-pipeline, 600-drain valve, 700-liquid level sensor, 800-base, 900-control element.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The indicated azimuth or position relationship is based on the azimuth or position relationship shown in the drawings, or is the azimuth or position relationship which is placed conventionally when the application product is used, or is the azimuth or position relationship which is understood conventionally by a person skilled in the art. The terms "disposed," "configured," "mounted," "connected," "coupled," and "connected" are to be construed broadly. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. And the embodiments and features of the embodiments in this application may be combined with each other without conflict.
Referring to fig. 1 to 4, the present invention provides a test tank simulating a washing apparatus tank environment, and the test tank 100 includes an upper tank 120, a lower tank 130, a drain pipe 400, and an air chamber 500.
The upper case 120 is cylindrical; the lower case 130 has a spherical shape, and the upper end thereof is connected to the lower end of the upper case 120 to form a flask-shaped structure.
In the actual use of the test tank 100, the test tank 100 is assembled with other devices to form a test system for parts (a liquid level sensor and a drain valve), since the drain valve faces a negative pressure working condition and ensures the airtight performance of the drain valve, the negative pressure resistance of the test tank 100 needs to be considered, since the test tank 100 is made of plastic materials in order to simulate the tank material of a real washing device (such as a washing machine), and since the test tank 100 is used for testing parts under a negative pressure condition, the test tank 100 needs to bear the negative pressure very frequently in the use process, the test tank 100 made of plastic is easy to deform or even damage, the service lives of the test tank and the test system are short, and the spherical structure is adopted to bear the pressure to the greatest extent, so that the tank is kept in a form when the interior of the test tank 100 is the negative pressure, however, if the whole design is spherical, the diameter of the test tank 100 will become larger under the condition that the volume of the test tank 100 needs to be maintained, but the test tank 100 has a requirement on the height of the liquid for testing the liquid level sensor, if the test tank 100 is spherical, the diameter needs to be large to meet the height requirement, which is unfavorable for saving space, and the difficulty of processing, designing and installing the base structure and the field requirement of the test system are greatly increased, so that the spherical structure of the lower tank 130 is used for resisting external air pressure, the arc surface of the spherical structure is easy to bear negative pressure, the spherical structure of the lower tank 130 can disperse the pressure, prevent the test tank 100 from deforming, and can not bear the negative pressure uniformly, the negative pressure resistance of the test tank 100 is greatly increased, the lower tank 130 of the spherical structure and the upper tank 120 of the cylindrical structure form a flask structure, realize the volumetric effect of most through lower part box 130 to store more water, and spherical structure can be better realize the resistance to compression effect, thereby upper portion box 120 realizes that vertical space draws in to let equal volumetric liquid can have higher liquid level simultaneously, satisfy higher liquid level test demand, and optimize design junction and additional strengthening and other supporting structure's installation relation etc. make test water tank 100 can satisfy the test demand to higher liquid level when satisfying stronger compressive capacity, reinforcing test system's practicality. In summary, the test water tank 100 can not only meet the function of simulating the water tank of the washing device, but also meet the compression-resistant effect, and meanwhile, the internal structure of the test water tank can also adapt to the influence of air pressure and water pressure. Further, the connection part 140 of the upper case 120 and the lower case 130 is a connection part with a small upper part and a large lower part, and the wall surface is in a circular arc structure, so that the effect of the whole test water tank 100 on resisting the vacuum pressure is ensured.
The inner cavity of the upper box body 120 is communicated with the inner cavity of the lower box body 130 to form a test cavity 110, the test cavity 110 is provided with a water inlet 102 provided with a water inlet valve, and the top of the test cavity 110 is connected with the outside through a pipe fitting provided with an air inlet valve; the drain pipe 400 is communicated with the bottom of the test cavity 110; the drain pipe 400 is used for draining the liquid inside the test chamber 110; the air chamber 500 is located in the test cavity 110 and is communicated with the inside of the test cavity 110 through an opening at the bottom; and the air chamber 500 is connected to a pipe penetrating out of the test water tank 100.
The test cavity 110 is used for providing a test environment, the water inlet 102 is used for injecting liquid into the test cavity 110, the pipe fitting is used for discharging gas in the test cavity 110 or introducing gas into the test cavity 110, and it is worth noting that the number of the test cavities 110 is at least one, and when the number is a plurality of the test cavities, the size of each test cavity can be the same or different; the number of the test cavities 110 can be 1, 2, 3, 4, etc., and different numbers of the test cavities 110 can be set according to different requirements to test the plurality of drain valves 600 and the liquid level sensor 700, and different sizes of the test cavities 110 can be set to test the liquid level sensor 700 and the drain valve 600 with different models. Preferably, the number of the test cavities 110 is 4, each test cavity 110 is independent, and 4 test cavities 110 are arranged around the central axis of the test water tank 100.
The water inlet valve can be a water inlet electromagnetic valve, and can be other valves as long as the liquid channel can be opened and closed; the top of the test cavity 110 is connected with the outside through a pipe provided with an air inlet valve, preferably, the air inlet valve is a two-position two-way valve, and in other embodiments, the air inlet valve can be other fluid valves as long as the air inlet valve can be capable of connecting and disconnecting a gas channel;
specifically, the air chamber wall 520 of the air chamber 500 is a shell structure (the shell structure is surrounded by an inner curved surface and an outer curved surface, the thickness t is far smaller than the minimum radius of curvature R of the middle surface and the sheet structure with a plane size, which is a generic term of a thin shell and a middle thick shell), and the air chamber 500 is integrally formed into a tile-shaped structure, that is, the air chamber wall 520 and the cavity wall of the test cavity 110 enclose to form the air chamber 500, the wall surface of the air chamber wall 520 facing the test cavity 110 is an arc-shaped surface 521 consistent with the shape of the test water tank 100, and by adopting the scheme, the test water tank 100 is integrally provided with two-sided arc-shaped structures, so that the compression resistance of the test water tank 100 and the inside of the test cavity 110 is further enhanced.
In this embodiment, the outer wall of the test water tank 100 has a transparent portion, and the transparent portion is provided with a scale mark 101, so that a tester can intuitively see the liquid level inside the test cavity 110 through the test water tank 100, and the scale mark 101 is used for the tester to read the liquid level of the test cavity 110.
It should be understood that the transparent portion may cover the entire test water tank 100, or may cover only the scale mark 101 area, and the latter may enable the test water tank 100 to be filled with a portion of a specific liquid, so as to reduce the influence of light on the specific liquid, for example, to fill a laundry detergent, which is easily deteriorated by light; in addition, the number of scale marks 101 is preferably identical to the number of the test cavities 110, and of course, for the arrangement of a plurality of test cavities 110, it is also possible to share one scale mark for two adjacent test cavities 110, and the scale marks 101 may be scale tables printed or adhered on the wall of the test water tank 100.
Based on the above, in some embodiments, in order to further enhance the compression resistance of the test cavity 110, reinforcing ribs 111 may be provided inside the test cavity 110.
With continued reference to fig. 1 to 7, the present invention further provides a test system for simulating the environment of a water tank of a washing device, which includes the test water tank 100, the negative pressure generating device 200, the pressure monitoring device 300 and the control element 900. In the in-service use, for convenient integrated use, still include base 800, test water tank 100 and negative pressure generating device 200 all install in on the base 800, realize the effect of test system integration, practice thrift the test space, be convenient for whole removal test system.
The negative pressure generating device 200 is connected with the top of the testing cavity 110 through a pipe fitting;
the pressure monitoring device 300 is connected with the top of the test cavity 110 through a pipe fitting;
the control element 900 is electrically connected to the drain valve 600; specifically, the control element 900 is disposed on the base 800, and is electrically connected to the liquid level sensor 700, the air inlet valve, the water inlet valve, and the negative pressure generating device 200, and when in use, the control element controls the opening or closing of the drain valve 600, the air inlet valve, the water inlet valve, and the negative pressure generating device 200, so as to perform efficient test operation, where the control element may be a PCBA (electric control board);
the drain pipe 400 is provided with a drain valve 600, and the pipeline is connected with a liquid level sensor 700; specifically, the pipeline is communicated with the interface of the liquid level sensor 700 through the pagoda head 510, the interface of the liquid level sensor 700 is connected with the pipeline 530, and the other end of the pipeline 530 is connected with the pagoda head 510;
wherein at least one of the drain valve 600, the liquid level sensor 700, the air inlet valve, the water inlet valve, the negative pressure generating device 200, and the pressure monitoring device 300 is used as a test part.
In this embodiment, the drain valve 600 and the liquid level sensor 700 are selected as the test parts, and it can be understood that the number of the drain valves 600 to be tested and the liquid level sensors 700 to be tested corresponds to the number of the test cavities 110 one by one, that is, 2 test cavities 110 correspond to 2 drain valves 600 to be tested, 2 liquid level sensors 700 to be tested, or 4 test cavities 110 correspond to 4 drain valves 600 to be tested, 4 liquid level sensors 700 to be tested. In this embodiment, the number of the test cavities 110 is 4, and it may be that 4 identical test cavities 110 simultaneously test 4 liquid level sensors 700 to be tested and 4 drain valves 600 to be tested, and of course, in other embodiments, 4 different sizes of test cavities 110 simultaneously test 4 liquid level sensors 700 to be tested and 4 drain valves 600 to be tested.
It should be noted that, when the number of the test cavities 110 is 1, i.e. the test cavities 110 are flask structures, the test cavities have pressure resistance; when the number of the test cavities 110 is plural, although the single test cavity 110 is not a flask structure, the plural test cavities are combined to form a flask structure, the overall structure is excellent, and the test cavities 110 can be unevenly pressed, for example, the number of the test cavities 110 is 4, and the 4 test cavities 110 are independent from each other and combined to form a flask-shaped structure.
In this embodiment, the air inlet valve is closed to seal the test cavity 110, so that the test system meets the sealing of the air tightness of the test drain valve, and the air inlet valve is opened to circulate the test cavity 110 with the external environment gas, so that the test cavity 110 is controlled to be turned into the open state of the test liquid level sensor from the sealed state of the air tightness of the test drain valve, that is, the test cavity 110 is in a negative pressure state, the external gas automatically enters the test cavity 110 through the opened air inlet valve, and the test drain valve and the test liquid level sensor are organically combined together. Specifically, the negative pressure generating device 200 is configured to meet the actual working condition environment of the water tank of the washing device, so that the inside of the test cavity 110 is a negative pressure environment, the pressure monitoring device 300 is used for detecting the negative pressure inside the test cavity 110, and the pressure inside the test cavity is monitored and displayed based on the pressure monitoring device 300, so as to judge the air tightness of the drain valve 600 to be tested, thereby realizing the test and detection of the air tightness of the drain valve. The liquid flows into the test cavity 110 from the water inlet 102, the water level in the test cavity 110 continuously rises, as the air in the air chamber 500 is kept airtight, the pressure in the air chamber 500 gradually increases along with the rising of the water level, the air chamber 500 is communicated with the liquid level sensor 700 to be tested, the liquid level sensor 700 to be tested can check the air pressure change of the cavity caused by the rising of the liquid level (the liquid level sensor monitors the liquid level through the pressure change of the air chamber caused by the rising of the liquid level, the liquid does not rise synchronously with the liquid level outside the air chamber after entering the air chamber 500 from bottom to top, the air chamber can dynamically maintain the internal and external pressure balance, namely the pressure of the liquid = the pressure of the internal gas), the pressure value of the liquid level sensor is set to be a measured value under a certain liquid level state, when the measured value of the pressure is reached, the liquid level sensor sends out an electric signal, the water inlet is closed, and the actual liquid level in the air chamber 110 is read and the liquid level corresponding to the measured value is compared.
Preferably, the negative pressure generating device 200 may be a negative pressure air pump, and the pressure monitoring device 300 may be a pressure gauge, or may be any other device capable of monitoring and displaying the internal pressure of the test cavity 110. It should be noted that the number of the negative pressure generating devices 200 may be consistent with the number of the test cavities 110, or 1 negative pressure generating device 200 may correspond to a plurality of test cavities 110, for example, an air inlet end of 1 negative pressure air pump is connected with one end of a multi-way pipe, the other end of the multi-way pipe is provided with 4 branch pipes, electromagnetic valves capable of cutting off air paths are respectively arranged on the 4 branch pipes, the 4 branch pipes are respectively connected with tops of the 4 test cavities 110, when in use, the electromagnetic valves on the 4 branch pipes can be opened one by one in staggered time, and the 4 test cavities 110 are subjected to sequential negative pressure pumping operation, so that the staggered test time can achieve the intensive test effect of one to many.
Based on the above, in some embodiments, the upper case 120 further includes a placement plate 150, the bottom surface of which is connected to the top surface of the upper case 120 through a connection block 151; the placing plate 150 is provided with fixing assemblies 160 with the same number as the test cavity 110 for fixing the liquid level sensor 700 to be tested, and the coaming 152 at the edge of the placing plate 150 is provided with a notch 153; the fixing assembly 160 includes a base 161, a pair of extension arms 162 and a avoiding groove 163, and the base 161 is mounted on the top surface of the placement plate 150; a pair of extension arms 162 are symmetrically installed on the base 161 to limit the position of the level sensor 700 to be tested; a clamping hook part 1621 is arranged at the top of the extension arm 162; the avoiding groove 163 is formed in the peripheral wall of the base body 161 to accommodate the interface of the liquid level sensor 700 to be tested, and the avoiding groove 163 corresponds to the notch 153.
The setting of placing the board 150 is convenient for put the level sensor 700 of installation waiting to test, do benefit to the effect that realizes the system integration, practice thrift test space, also be convenient for change other level sensor 700 of waiting to test, and fixed subassembly 160 is fixed the level sensor 700 of waiting to test, avoid the level sensor 700 of waiting to test to take place phenomenon such as shift in the test and influence test effect and accuracy, the pedestal 161 of fixed subassembly 160 is used for placing the level sensor 700 of waiting to test, extension arm 162 cooperates with pothook 1621 and restricts the level sensor 700 of waiting to test on pedestal 161, avoid the level sensor 700 of waiting to test effectively and remove, dodge the groove 163 and be convenient for place the interface of the level sensor 700 of waiting to test, the breach 153 is for connecting the pipeline 530 of level sensor 700 interface and pagoda head 510 of waiting to test to pass through, just breach 153 upper portion is horn mouth form, so that pipeline 530 put into on breach 153, adopt this kind of scheme, make the level sensor 700 of waiting to test and connected pipeline 530 neatly install on pedestal 161, make the orderly test system structure compact. In order to further enhance the structural strength of the placement plate 150, a plurality of reinforcing ribs 154 may be disposed at the bottom of the placement plate 150, the reinforcing ribs 154 extend to the top of the lower case 130, and the side edges of the reinforcing ribs 154 are connected with the outer wall of the upper case 120 of the test water tank 100, and the reinforcing ribs 154 may simultaneously enhance the strength of the upper case 120, thereby enhancing the pressure-bearing effect of the upper case 120 when subjected to negative pressure.
Based on the above, in some embodiments, the bottom of the lower case 130 is provided with the supporting cylinder 170, the outer edge of the bottom of the supporting cylinder 170 is provided with the mounting skirt 171, specifically, the mounting skirt 171 and the base 800 may be detachably mounted, for example, a plurality of through holes may be formed on the mounting skirt 171, and the fixing bolts may pass through the through holes to enter the base 800 to fix the supporting cylinder 170 on the base 800, and since the supporting cylinder 170 has a height, the bottom of the lower case 130 may be separated from the upper surface of the base 800, so that the drain pipe 400 penetrates from the bottom of the test cavity 110 into the supporting cylinder 170 after penetrating out of the test water tank 100, and then turns to horizontally extend out of the supporting cylinder 170, thereby facilitating the installation of the drain valve 600 to be tested.
Based on the above, in some embodiments, the negative pressure generating device 200 is connected to the top of the test cavity 110 through a multi-way pipe, one end of the multi-way pipe is connected to the air port 103 at the top of the test cavity 110, the other end of the multi-way pipe has a first branch pipe, a second branch pipe and a third branch pipe, the first branch pipe is connected to the negative pressure generating device 200, the pressure monitoring device 300 is disposed on the second branch pipe, and the air inlet valve is installed at the pipe orifice of the third branch pipe. When the device is specifically used, the third branch pipe is provided with the air inlet valve, the air inlet valve is opened, external air can enter the test cavity 110 through the third branch pipe and the air port 103, the air inlet valve is closed, the test cavity 110 can meet the sealing requirement, air in the test cavity 110 is pumped away by the negative pressure generating device 200 through the air port 103 and the first branch pipe, so that a negative pressure state is formed inside the test cavity 110, and the pressure monitoring device 300 is communicated with the inside of the test cavity 110 through the second branch pipe, so that the pressure monitoring device 300 can monitor and display the pressure inside the test cavity 110.
It should be noted that in other embodiments, the pipe may be a single common pipe (i.e. only one flow path), and the common pipe may be a straight pipe or a single pipe, for example, the top of the test chamber 110 is provided with 3 air ports 103, the pipe connects one of the air ports 103 with the negative pressure generating device 200, the other pipe is connected with the other air port 103 and the pressure monitoring device 300 is disposed on the pipe, and the other pipe is connected with the other air port 103 and the air valve is mounted on the pipe.
In the actual use process of the test system of the present invention, when the number of test cavities 110 is multiple, for example, 4, the test can be performed according to different time (different water inlet speeds of each test cavity 110), and the test cavities 110 are not synchronous in pressure, so that the test water tank 100 is not uniformly pressed, and the negative pressure condition of the test water tank 100 is divided into 5 working conditions, which are specifically as follows:
working condition 1: one test chamber 110 is subjected to negative pressure: the water inlet speed of one test cavity 110 is higher than that of other test cavities 110, and the limit value of the negative pressure of the test cavity 110 is reached first;
working condition 2: adjacent two test chambers 110 are subjected to negative pressure: the water inlet speed of two adjacent test cavities 110 is higher, and compared with other test cavities 110, the limit value of the negative pressure of the test cavity 110 is reached;
Working condition 3: the diagonal two test chambers 110 are under negative pressure: the water inlet speed of the two diagonal test cavities 110 is higher, and compared with other test cavities 110, the limit value of the negative pressure of the test cavity 110 is reached;
working condition 4: three test chambers 110 are under negative pressure: one test cavity 110 has a water inlet speed slower than that of other test cavities 110, and the other three test cavities 110 reach the limit value of the negative pressure of the test cavity 110;
working condition 5: all four test chambers 110 are under negative pressure: the water inlet speeds of the four test cavities 110 are consistent, and the four test cavities 110 reach the limit value of negative pressure at the same time.
According to a certain working condition, the test water tank 100 simulating the water tank environment of the washing device provided by the invention is manufactured in a required size, and the used materials are high-strength transparent resin, and the density of the materials is as follows: 1.13g/cm 3 Poisson's ratio is 0.41 and Young's modulus is 2700MPa. The test water tank 100 under the above 5 working conditions is tested by adopting (deformation, stress and tensile strength testing methods), namely, the internal is subjected to vacuum test, and the adopted negative pressure value limit value is as follows: 80kpa, the test results are shown in table 1 below:
table 1 test structure condition table for test water tank under different working conditions
According to the stress value obtained by the test, the tensile strength of the test water tank 100 of the test system meets the requirement, and the test system can adapt to negative pressure test. In addition, because the negative pressure is greater than the water pressure, the hydraulic pressure test can also be adapted.
The third aspect of the present invention provides a test method of a test system for simulating the water tank environment of a washing device, which adopts the above-mentioned part test system for simulating the water tank environment, and selects the liquid level sensor 700 and the drain valve 600 as test parts, comprising the following test steps:
s010, mounting the drain valve 600 to be tested on the drain pipe 400, and connecting the liquid level sensor 700 to be tested with the pipeline; at this time, the intake valve and the intake valve are in an open state, and the drain valve 600 to be tested is in a closed state;
s020, the steps comprise:
s021 drain valve air tightness test: closing the water inlet valve and the air inlet valve, opening the negative pressure generating device 200, forming negative pressure in the test cavity 110, and reading the pressure monitoring device 300 to judge the air tightness of the water outlet valve 600 to be tested; if the negative pressure in the test chamber 110 can reach the set parameters, the drain valve 600 is qualified, otherwise, the drain valve 600 is unqualified;
s022, accuracy testing of a liquid level sensor and water tightness testing of a drain valve: according to the target pressure measured value of the liquid level sensor 700 to be tested, liquid is injected into the testing cavity 110, a signal is transmitted to control the water inlet valve to be closed after the target pressure is measured by the liquid level sensor 700 to be tested, and the reading of the scale mark 101 of the testing water tank 100 is compared with the measured liquid level of the liquid level sensor 700 to be tested, so that the accuracy of the liquid level sensor 700 to be tested is judged; if the reading of the scale mark 101 of the test water tank 100 is consistent with the liquid level measured by the liquid level sensor 700, the liquid level sensor 700 is qualified, otherwise, the liquid level sensor 700 is unqualified; meanwhile, whether water flows out of the drain pipe 400 or not is observed, so that the water tightness of the drain valve 600 to be tested is judged;
If the test method of S022 is carried out after the S021 is carried out, the test method comprises the following steps: after the step S021, the negative pressure generating device is closed, and the intake valve are opened until the internal air pressure of the test cavity 110 is restored to the atmospheric pressure, and then the step S022 is performed; or if the test method S022 is performed first, the test method S021 is as follows: after the step S022, the drain valve 600 to be tested is opened to drain the liquid in the testing cavity 110, and then the drain valve 600 to be tested is closed to perform the step S021.
Specifically, in one embodiment, the drain valve air tightness test is first performed:
s010, mounting the drain valve 600 to be tested on the drain pipe 400, and connecting the liquid level sensor 700 to be tested with the pipeline; at this time, the intake valve and the intake valve are in an open state, and the drain valve 600 to be tested is in a closed state;
s020, closing the water inlet valve and the air inlet valve, opening the negative pressure generating device 200, forming negative pressure in the test cavity 110, and reading the pressure monitoring device 300 to judge the air tightness of the water outlet valve 600 to be tested; if the negative pressure in the test cavity 110 can reach-75 kPa and the air leakage is less than or equal to 0.1kPa/s, the test of the test cavity 110 by the test water tank 100 is proved to be airtight, the drain valve meets the negative pressure test and can ensure the tightness, the air tightness of the drain valve is qualified, and otherwise, the drain valve is not qualified; then, closing the negative pressure generating device 200, opening the air inlet valve and the water inlet valve until the air pressure in the test cavity 110 is restored to atmospheric pressure, injecting liquid into the test cavity 110 according to the target pressure measured value of the liquid level sensor 700 to be tested, transmitting a signal to control the water inlet valve to be closed after the target pressure is measured by the liquid level sensor 700 to be tested, and comparing the reading of the scale mark 101 of the test water tank 100 with the measured liquid level of the liquid level sensor 700 to be tested to judge the accuracy of the liquid level sensor 700 to be tested; if the reading of the scale mark 101 of the test water tank 100 is consistent with the liquid level measured by the liquid level sensor 700, the liquid level sensor 700 is qualified, otherwise, the liquid level sensor 700 is unqualified; in this process, it is simultaneously observed whether there is water flowing out in the drain pipe 400 to determine the water tightness of the drain valve 600 to be tested, if there is no water flowing out or oozing out in the drain pipe 400, the water tightness of the drain valve 600 is qualified, otherwise, it is not qualified, and the single test is finished.
Of course, in another embodiment, the accuracy test of the liquid level sensor and the water tightness test of the drain valve are performed first:
s010, mounting the drain valve 600 to be tested on the drain pipe 400, and connecting the liquid level sensor 700 to be tested with the pipeline; at this time, the intake valve and the intake valve are in an open state, and the drain valve 600 to be tested is in a closed state;
s020, injecting liquid into the testing cavity 110 according to a target pressure measured value of the liquid level sensor 700 to be tested, transmitting a signal to control the water inlet valve to be closed after the target pressure is measured by the liquid level sensor 700 to be tested, and comparing the reading of the scale mark 101 of the testing water tank 100 with the measured liquid level of the liquid level sensor 700 to be tested to judge the accuracy of the liquid level sensor 700 to be tested; if the reading of the scale mark 101 of the test water tank 100 is consistent with the liquid level measured by the liquid level sensor 700, the liquid level sensor 700 is qualified, otherwise, the liquid level sensor 700 is unqualified; in the process, whether water flows out of the drain pipe 400 or not is observed at the same time to judge the water tightness of the drain valve 600 to be tested, if no water flows out or seeps out of the drain pipe 400, the water tightness of the drain valve 600 is qualified, otherwise, the water tightness is not qualified; then, opening the drain valve 600 to be tested to empty the liquid in the test cavity 110, closing the drain valve 600 to be tested, closing the air inlet valve, opening the negative pressure generating device 200, forming negative pressure in the test cavity 110, and reading the pressure monitoring device 300 to judge the air tightness of the drain valve 600 to be tested; if the negative pressure in the test cavity 110 can reach-75 kPa and the air leakage is less than or equal to 0.1kPa/s, the test of the inside of the test cavity 110 by the test water tank 100 is proved to be airtight, the drain valve meets the negative pressure test and can ensure the tightness, the air tightness of the drain valve is qualified, otherwise, the drain valve is unqualified, and the single test is finished.
And (3) testing the ageing resistance of the liquid level sensor and the drain valve, and repeating the steps S010-S020 for a plurality of times. Repeating the steps S010-S020 for a plurality of times, if the accuracy of the liquid level sensor is qualified, indicating that the ageing resistance of the liquid level sensor is qualified, and if the air tightness and the water tightness of the drain valve are both qualified, the ageing resistance of the drain valve is qualified.
In summary, the liquid level sensor test and the drain valve test are organically unified, so that the test system has the liquid level sensor test and the drain valve test functions, and the drain valve and the liquid level sensor can be tested by adopting one set of system equipment, thereby improving the overall test efficiency; the test system can be used for testing the air tightness and the water tightness of the drain valve, and is beneficial to improving the test effect; through designing test water tank 100 structure for test water tank 100 can satisfy the function of simulation washing device water tank, can satisfy the effect of resistance to compression again, and its inside structure also can adapt to the influence of atmospheric pressure and water pressure simultaneously, is favorable to prolonging test system's life.
Of course, in other embodiments, based on the testing system of the present invention, the water pressure or water level related elements required by other washing machines may be tested by using the testing system according to the testing method in the prior art, such as the air inlet valve, the water inlet valve, the negative pressure generating device 200 (negative pressure air pump), the pressure monitoring device 300, the control element 900 (control chip), etc., for example, the control chip in the testing device is tested, the control chip is electrically connected with the air inlet valve, the water outlet valve, and the negative pressure air pump, and the air inlet valve, the water outlet valve, and the negative pressure air pump are repeatedly opened or closed by the control chip, and if the control chip fails (cannot open or close the air inlet valve, the water outlet valve, and the negative pressure air pump), the control chip is failed, otherwise, the control chip is qualified.
Although embodiments of the present invention have been disclosed in the foregoing description and illustrated in the drawings, it is not intended to be limited to the details and embodiments shown and described, but rather to be fully applicable to various fields of adaptation to the present invention, and further modifications may be readily made by those skilled in the art without departing from the general concept defined by the claims and the equivalents thereof, and it is therefore apparent that the invention is not limited to the specific details and illustrations shown and described herein, and that various changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (9)
1. The test system for simulating the environment of the water tank of the washing device is characterized by comprising a test water tank (100), a negative pressure generating device (200), a pressure monitoring device (300) and a control element (900):
the test tank (100) comprises:
an upper case (120) having a cylindrical shape,
a lower case (130) having a ball shape, the upper end of which is connected to the lower end of the upper case (120) to form a flask-shaped structure;
the inner cavity of the upper box body (120) is communicated with the inner cavity of the lower box body (130) to form a test cavity (110), and the test cavity (110) is provided with a water inlet (102) provided with a water inlet valve; the bottom of the test cavity (110) is communicated with a drain pipe (400);
The negative pressure generating device (200) is connected with the top of the testing cavity (110) through a pipe fitting;
the pressure monitoring device (300) is connected with the top of the testing cavity (110) through a pipe fitting;
the control element (900) is electrically connected with the drain valve (600);
the drain pipe (400) is provided with a drain valve (600); the pipeline is connected with the liquid level sensor (700);
wherein at least one of the drain valve (600), the liquid level sensor (700), the air inlet valve, the water inlet valve, the negative pressure generating device (200) and the pressure monitoring device (300) is used as a test part.
2. The test system for simulating the environment of a water tank of a washing device according to claim 1, further comprising an air chamber (500), wherein the top of the test cavity (110) is connected to the outside through a tube provided with an air inlet valve;
the air chamber (500) is positioned in the test cavity (110) and is communicated with the inside of the test cavity (110) through an opening at the bottom; and the air chamber (500) is connected with the pipeline penetrating out of the test water tank (100).
3. A test system for simulating the environment of a washing unit tank according to claim 1, wherein the outer wall of the test tank (100) has a transparent portion with graduation marks (101) thereon.
4. A test system for simulating the environment of a washing unit tank according to claim 2, wherein the air chamber (500) has a housing structure with the air chamber wall (520) being of a tile-shaped configuration throughout the air chamber (500).
5. A test system for simulating the environment of a washing unit tank according to claim 1, wherein the number of test chambers (110) is at least one, and when the number is plural, the dimensions of each can be the same or different.
6. The system according to claim 1, wherein the control element (900) is disposed on the base (800), and the control element (900) is electrically connected to the liquid level sensor (700), the air inlet valve, the water inlet valve, and the negative pressure generating device (200), respectively, and the test water tank (100) and the pressure monitoring device (300) are both mounted on the base (800).
7. The system according to claim 6, wherein the negative pressure generating device (200) is connected to the top of the test chamber (110) through a multi-way pipe, one end of the multi-way pipe is connected to the air port (103) at the top of the test chamber (110), the other end of the multi-way pipe has a first branch pipe, a second branch pipe and a third branch pipe, the first branch pipe is connected to the negative pressure generating device (200), the pressure monitoring device (300) is disposed on the second branch pipe, and the air inlet valve is mounted at the pipe orifice of the third branch pipe.
8. A test method of a test system for simulating the water tank environment of a washing device, which adopts the test system for simulating the water tank environment of the washing device according to any one of claims 1 to 7, and is characterized in that at least one of a drain valve (600), a liquid level sensor (700), an air inlet valve, an inlet valve, a negative pressure generating device (200), a pressure monitoring device (300) and a control element (900) is selected as a test part for testing;
wherein, when selecting the liquid level sensor (700) and the drain valve (600) as test parts, the method comprises the following test steps:
s010, installing a drain valve (600) to be tested on the drain pipe (400), and connecting a liquid level sensor (700) to be tested with the pipeline;
s020, performing air tightness test of the drain valve (600) and/or accuracy test of the liquid level sensor (700) and water tightness test of the drain valve (600).
9. The method for testing the system for simulating the environment of the water tank of the washing device according to claim 8, wherein in the step S010, the intake valve and the intake valve are in an opened state, and the drain valve (600) to be tested is in a closed state;
the step S020 includes:
S021 drain valve air tightness test, namely closing a water inlet valve and an air inlet valve, opening a negative pressure generating device (200), forming negative pressure in a test cavity (110), and reading a pressure monitoring device (300) to judge the air tightness of a drain valve (600) to be tested; if the negative pressure in the test cavity (110) can reach the set parameters, the drain valve is qualified, otherwise, the drain valve is unqualified;
s022, accuracy testing of a liquid level sensor and water tightness testing of a drain valve: according to a target pressure measured value of a liquid level sensor (700) to be tested, injecting liquid into a testing cavity (110), transmitting a signal to control a water inlet valve to be closed after the target pressure is measured by the liquid level sensor (700) to be tested, and comparing the reading of a scale mark (101) of a water tank (100) with the measured liquid level of the liquid level sensor (700) to be tested to judge the accuracy of the liquid level sensor (700) to be tested; if the reading of the scale mark (101) of the water tank (100) is consistent with the liquid level measured by the liquid level sensor (700), the liquid level sensor (700) is qualified, otherwise, the liquid level sensor (700) is unqualified; meanwhile, whether water flows out of the drain pipe (400) or not is observed, and the water tightness of the drain valve (600) to be tested is judged;
If the test method of S022 is carried out after the S021 is carried out, the test method comprises the following steps: after the step S021 is carried out, the negative pressure generating device is closed, the air inlet valve and the water inlet valve are opened until the air pressure in the test cavity (110) is restored to the atmospheric pressure, the step S022 is carried out, and the single test is finished; or if the test method S022 is performed first, the test method S021 is as follows: after the step S022 is carried out, opening a drain valve (600) to be tested to drain liquid in the test cavity (110), closing the drain valve (600) to be tested, and carrying out the step S021, wherein the single test is finished;
and S030, if the ageing resistance of the liquid level sensor (700) and the drain valve (600) is required to be tested, repeating the steps S010-S020 for a plurality of times.
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